refactor: sway: port away from home-manager

```
• Updated input 'mobile-nixos':
    'github:nixos/mobile-nixos/4d2093efa7efa00131d385fd9d11e54ce16bc57a' (2023-01-24)
  → 'github:nixos/mobile-nixos/80ece5a61738fbf3b96fdda402ab2dfc74ee5cee' (2023-01-27)
• Updated input 'nixpkgs':
    'path:/nix/store/2yvdsmlp8nx67fh4gvn64mbm82pbgzz8-source/nixpatches?lastModified=1&narHash=sha256-hxFwrPvi%2fvd6g8BfCYtTM2CEIDde%2fgz7GjVmkmRzP+o=' (1970-01-01)
  → 'path:/nix/store/4xd16l52dabh0xgwg57j4qraj2nrijl5-source/nixpatches?lastModified=1&narHash=sha256-hxFwrPvi%2fvd6g8BfCYtTM2CEIDde%2fgz7GjVmkmRzP+o=' (1970-01-01)
• Updated input 'nixpkgs-stable':
    'github:nixos/nixpkgs/ab1254087f4cdf4af74b552d7fc95175d9bdbb49' (2023-01-22)
  → 'github:nixos/nixpkgs/def9e420d27c951026d57dc96ce0218c3131f412' (2023-01-26)
• Updated input 'nixpkgs-unpatched':
    'github:nixos/nixpkgs/1b1f50645af2a70dc93eae18bfd88d330bfbcf7f' (2023-01-23)
  → 'github:nixos/nixpkgs/9b97ad7b4330aacda9b2343396eb3df8a853b4fc' (2023-01-25)
```

.sops.yaml

@@ -0,0 +1,47 @@
+keys:
+  - &user_desko_colin age1tnl4jfgacwkargzeqnhzernw29xx8mkv73xh6ufdyde6q7859slsnzf24x
+  - &user_lappy_colin age1j2pqnl8j0krdzk6npe93s4nnqrzwx978qrc0u570gzlamqpnje9sc8le2g
+  - &user_servo_colin age1z8fauff34cdecr6sjkre260luzxcca05kpcwvhx988d306tpcejsp63znu
+  - &user_moby_colin age1zsrsvd7j6l62fjxpfd2qnhqlk8wk4p8r0dtxpe4sdgnh2474095qdu7xj9
+  - &host_desko age1vnw7lnfpdpjn62l3u5nyv5xt2c965k96p98kc43mcnyzpetrts9q54mc9v
+  - &host_lappy age1w7mectcjku6x3sd8plm8wkn2qfrhv9n6zhzlf329e2r2uycgke8qkf9dyn
+  - &host_servo age1tzlyex2z6t88tg9h82943e39shxhmqeyr7ywhlwpdjmyqsndv3qq27x0rf
+  - &host_moby age18vq5ktwgeaysucvw9t67drqmg5zd5c5k3le34yqxckkfj7wqdqgsd4ejmt
+creation_rules:
+  - path_regex: secrets/universal*
+    key_groups:
+    - age:
+      - *user_desko_colin
+      - *user_lappy_colin
+      - *user_servo_colin
+      - *user_moby_colin
+      - *host_desko
+      - *host_lappy
+      - *host_servo
+      - *host_moby
+  - path_regex: secrets/servo*
+    key_groups:
+    - age:
+      - *user_desko_colin
+      - *user_lappy_colin
+      - *user_servo_colin
+      - *host_servo
+  - path_regex: secrets/desko.yaml$
+    key_groups:
+    - age:
+      - *user_desko_colin
+      - *user_lappy_colin
+      - *host_desko
+  - path_regex: secrets/lappy.yaml$
+    key_groups:
+    - age:
+      - *user_lappy_colin
+      - *user_desko_colin
+      - *host_lappy
+  - path_regex: secrets/moby.yaml$
+    key_groups:
+    - age:
+      - *user_desko_colin
+      - *user_lappy_colin
+      - *user_moby_colin
+      - *host_moby

TODO.md

@@ -1,21 +0,0 @@
-# features/tweaks
-- enable sshfs (deskto/lappy)
-- set firefox default search engine
-- iron out video drivers
-
-# cleanup
-- remove helpers from outputs section (use `let .. in`)
-
-
-# speed up cross compiling
-   https://nixos.wiki/wiki/Cross_Compiling
-   https://nixos.wiki/wiki/NixOS_on_ARM
-   overlays = [{ ... }: {
-     nixpkgs.crossSystem.system = "aarch64-linux";
-   }];
-
-# better secrets management? read:
-- decrypted at activation time: https://github.com/Mic92/sops-nix
-less promising:
-- https://christine.website/blog/nixos-encrypted-secrets-2021-01-20
-- git-crypt (https://github.com/bobbbay/dotfiles.git)

configuration.nix

@@ -1,25 +0,0 @@
-# Edit this configuration file to define what should be installed on
-# your system.  Help is available in the configuration.nix(5) man page
-# and in the NixOS manual (accessible by running ‘nixos-help’).
-
-# USEFUL COMMANDS:
-#   nix show-config
-#   nix eval --raw <expr>  => print an expression. e.g. nixpkgs.raspberrypifw prints store path to the package
-#   nix-option   ##  query options -- including their SET VALUE; similar to search: https://search.nixos.org/options
-#   nixos-rebuild switch --upgrade   ## pull changes from the nixos channel (e.g. security updates) and rebuild
-
-{ config, pkgs, ... }:
-
-{
-
-  # enable flake support.
-  # the real config root lives in flake.nix
-  nix = {
-    #package = pkgs.nixFlakes;
-    package = pkgs.nixUnstable;
-    extraOptions = ''
-      experimental-features = nix-command flakes
-    '';
-  };
-}
-

flake.lock

@@ -1,5 +1,20 @@
 {
   "nodes": {
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1659877975,
+        "narHash": "sha256-zllb8aq3YO3h8B/U0/J1WBgAL8EX5yWf5pMj3G0NAmc=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "c0e246b9b83f637f4681389ecabcb2681b4f3af0",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
     "home-manager": {
       "inputs": {
         "nixpkgs": [
@@ -7,11 +22,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1654113405,
-        "narHash": "sha256-VpK+0QaWG2JRgB00lw77N9TjkE3ec0iMYIX1TzGpxa4=",
+        "lastModified": 1667907331,
+        "narHash": "sha256-bHkAwkYlBjkupPUFcQjimNS8gxWSWjOTevEuwdnp5m0=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "ac2287df5a2d6f0a44bbcbd11701dbbf6ec43675",
+        "rev": "6639e3a837fc5deb6f99554072789724997bc8e5",
         "type": "github"
       },
       "original": {
@@ -24,11 +39,11 @@
     "mobile-nixos": {
       "flake": false,
       "locked": {
-        "lastModified": 1654281294,
-        "narHash": "sha256-hT2/u0jUOD4TFU6YyYt+5Gt+hjIeerLTyZG7ru79aDU=",
+        "lastModified": 1674779092,
+        "narHash": "sha256-mFBD0Dvjf8tuxWtJhsCQ+8VYqI4fQeWjd/vfWsZiRRo=",
         "owner": "nixos",
         "repo": "mobile-nixos",
-        "rev": "d798b0b34240b18a08c22f5c0ee1f59a3ce43c01",
+        "rev": "80ece5a61738fbf3b96fdda402ab2dfc74ee5cee",
         "type": "github"
       },
       "original": {
@@ -38,32 +53,67 @@
       }
     },
     "nixpkgs": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs-unpatched"
+        ]
+      },
       "locked": {
-        "lastModified": 1654275867,
-        "narHash": "sha256-pt14ZE4jVPGvfB2NynGsl34pgXfOqum5YJNpDK4+b9E=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "7a20c208aacf4964c19186dcad51f89165dc7ed0",
-        "type": "github"
+        "lastModified": 1,
+        "narHash": "sha256-5pNu9Ph1LIBj5q9RWLV3r7daANjmd4u5y+MVq8vlfS4=",
+        "path": "/nix/store/bjzsgw8zn4av0dv4sqyj7vxhi43na16y-source/nixpatches",
+        "type": "path"
       },
       "original": {
-        "id": "nixpkgs",
-        "ref": "nixos-22.05",
-        "type": "indirect"
+        "path": "/nix/store/bjzsgw8zn4av0dv4sqyj7vxhi43na16y-source/nixpatches",
+        "type": "path"
       }
     },
-    "nurpkgs": {
+    "nixpkgs-stable": {
       "locked": {
-        "lastModified": 1654367137,
-        "narHash": "sha256-xufB/+qvk/7rh7qrwZbzru1kTu8nsmNWBNQkYbdS84Q=",
-        "owner": "nix-community",
-        "repo": "NUR",
-        "rev": "86ff2d098bce1d623232f4886027a1d61317b195",
+        "lastModified": 1674692158,
+        "narHash": "sha256-oqGpwVg4D+eMSgF7Th5Ve1ysCiH3H3g85vGJ3nvJsZQ=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "def9e420d27c951026d57dc96ce0218c3131f412",
         "type": "github"
       },
       "original": {
-        "owner": "nix-community",
-        "repo": "NUR",
+        "owner": "nixos",
+        "ref": "nixos-22.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-stable_2": {
+      "locked": {
+        "lastModified": 1674352297,
+        "narHash": "sha256-OkAnJPrauEcUCrst4/3DKoQfUn2gXKuU6CFvhtMrLgg=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "918b760070bb8f48cb511300fcd7e02e13058a2e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "release-22.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-unpatched": {
+      "locked": {
+        "lastModified": 1674641431,
+        "narHash": "sha256-qfo19qVZBP4qn5M5gXc/h1MDgAtPA5VxJm9s8RUAkVk=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "9b97ad7b4330aacda9b2343396eb3df8a853b4fc",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
         "type": "github"
       }
     },
@@ -72,7 +122,52 @@
         "home-manager": "home-manager",
         "mobile-nixos": "mobile-nixos",
         "nixpkgs": "nixpkgs",
-        "nurpkgs": "nurpkgs"
+        "nixpkgs-stable": "nixpkgs-stable",
+        "nixpkgs-unpatched": "nixpkgs-unpatched",
+        "sops-nix": "sops-nix",
+        "uninsane-dot-org": "uninsane-dot-org"
+      }
+    },
+    "sops-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "nixpkgs-stable": "nixpkgs-stable_2"
+      },
+      "locked": {
+        "lastModified": 1674546403,
+        "narHash": "sha256-vkyNv0xzXuEnu9v52TUtRugNmQWIti8c2RhYnbLG71w=",
+        "owner": "Mic92",
+        "repo": "sops-nix",
+        "rev": "b6ab3c61e2ca5e07d1f4eb1b67304e2670ea230c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "Mic92",
+        "repo": "sops-nix",
+        "type": "github"
+      }
+    },
+    "uninsane-dot-org": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1666870107,
+        "narHash": "sha256-b9eXZxSwhzdJI5uQgfrMhu4SY2POrPkinUg7F5gQVYo=",
+        "ref": "refs/heads/master",
+        "rev": "80c6ec95bd430e29d231cf745f19279bb76fb382",
+        "revCount": 164,
+        "type": "git",
+        "url": "https://git.uninsane.org/colin/uninsane"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://git.uninsane.org/colin/uninsane"
       }
     }
   },

flake.nix

@@ -1,114 +1,191 @@
-# docs:
-#   https://nixos.wiki/wiki/Flakes
-#   https://serokell.io/blog/practical-nix-flakes
+# FLAKE FEEDBACK:
+# - if flake inputs are meant to be human-readable, a human should be able to easily track them down given the URL.
+#   - this is not the case with registry URLs, like `nixpkgs/nixos-22.11`.
+#   - this is marginally the case with schemes like `github:nixos/nixpkgs`.
+#   - given the *existing* `git+https://` scheme, i propose expressing github URLs similarly:
+#     - `github+https://github.com/nixos/nixpkgs/tree/nixos-22.11`
+# - need some way to apply local patches to inputs.
+#
+#
+# DEVELOPMENT DOCS:
+# - Flake docs: <https://nixos.wiki/wiki/Flakes>
+# - Flake RFC: <https://github.com/tweag/rfcs/blob/flakes/rfcs/0049-flakes.md>
+#   - Discussion: <https://github.com/NixOS/rfcs/pull/49>
+# - <https://serokell.io/blog/practical-nix-flakes>
 
 {
+  # XXX: use the `github:` scheme instead of the more readable git+https: because it's *way* more efficient
+  # preferably, i would rewrite the human-readable https URLs to nix-specific github: URLs with a helper,
+  # but `inputs` is required to be a strict attrset: not an expression.
   inputs = {
-    nixpkgs.url = "nixpkgs/nixos-22.05";
-    # pkgs-telegram.url = "nixpkgs/33775ec9a2173a08e46edf9f46c9febadbf743e8";# 2022/04/18; telegram 3.7.3. fails: nix log /nix/store/y5kv47hnv55qknb6cnmpcyraicay79fx-telegram-desktop-3.7.3.drv: g++: fatal error: cannot execute '/nix/store/njk5sbd21305bhr7gwibxbbvgbx5lxvn-gcc-9.3.0/libexec/gcc/aarch64-unknown-linux-gnu/9.3.0/cc1plus': execv: No such file or directory
+    # <https://github.com/nixos/nixpkgs/tree/nixos-22.11>
+    nixpkgs-stable.url = "github:nixos/nixpkgs?ref=nixos-22.11";
+
+    # <https://github.com/nixos/nixpkgs/tree/nixos-unstable>
+    nixpkgs-unpatched.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+    nixpkgs = {
+      url = "./nixpatches";
+      inputs.nixpkgs.follows = "nixpkgs-unpatched";
+    };
     mobile-nixos = {
+      # <https://github.com/nixos/mobile-nixos>
       url = "github:nixos/mobile-nixos";
       flake = false;
     };
     home-manager = {
-      url = "github:nix-community/home-manager/release-22.05";
+      # <https://github.com/nix-community/home-manager/tree/release-22.05>
+      url = "github:nix-community/home-manager?ref=release-22.05";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    sops-nix = {
+      # <https://github.com/Mic92/sops-nix>
+      url = "github:Mic92/sops-nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    uninsane-dot-org = {
+      url = "git+https://git.uninsane.org/colin/uninsane";
       inputs.nixpkgs.follows = "nixpkgs";
     };
-    nurpkgs.url = "github:nix-community/NUR";
   };
 
-  outputs = { self, nixpkgs, mobile-nixos, home-manager, nurpkgs }: {
-    machines.uninsane = self.decl-bootable-machine { name = "uninsane"; system = "aarch64-linux"; };
-    machines.desko = self.decl-bootable-machine { name = "desko"; system = "x86_64-linux"; };
-    machines.lappy = self.decl-bootable-machine { name = "lappy"; system = "x86_64-linux"; };
+  outputs = {
+    self,
+    nixpkgs,
+    nixpkgs-stable,
+    nixpkgs-unpatched,
+    mobile-nixos,
+    home-manager,
+    sops-nix,
+    uninsane-dot-org
+  }:
+    let
+      nixpkgsCompiledBy = local: nixpkgs.legacyPackages."${local}";
 
-    machines.moby =
-      let machine = self.decl-machine {
-        name = "moby";
-        system = "aarch64-linux";
-        extraModules = [
-          (import "${mobile-nixos}/lib/configuration.nix" {
-            device = "pine64-pinephone";
-          })
-        ];
-      };
-      in {
-        nixosConfiguration = machine;
-        img = machine.config.mobile.outputs.u-boot.disk-image;
-      };
-
-    nixosConfigurations = builtins.mapAttrs (name: value: value.nixosConfiguration) self.machines;
-    imgs = builtins.mapAttrs (name: value: value.img) self.machines;
-
-    decl-machine = { name, system, extraModules ? [], basePkgs ? nixpkgs }: let
-      patchedPkgs = basePkgs.legacyPackages.${system}.applyPatches {
-        name = "nixpkgs-patched-uninsane";
-        src = basePkgs;
-        patches = [
-          # for mobile: allow phoc to scale to non-integer values
-          ./nixpatches/01-phosh-float-scale.patch
-          # for raspberry pi: allow building u-boot for rpi 4{,00}
-          ./nixpatches/02-rpi4-uboot.patch
-          ./nixpatches/03-whalebird-4.6.0.patch
-        ];
-      };
-      nixosSystem = import (patchedPkgs + "/nixos/lib/eval-config.nix");
-      in (nixosSystem {
-        inherit system;
-        specialArgs = { inherit home-manager; inherit nurpkgs; secrets = import ./secrets/default.nix; };
+      evalHost = { name, local, target }:
+        let
+          # XXX: we'd prefer to use `nixosSystem = (nixpkgsCompiledBy target).nixos`
+          # but it doesn't propagate config to the underlying pkgs, meaning it doesn't let you use
+          # non-free packages even after setting nixpkgs.allowUnfree.
+          # XXX: patch using the target -- not local -- otherwise the target will
+          # need to emulate the host in order to rebuild!
+          nixosSystem = import ((nixpkgsCompiledBy target).path + "/nixos/lib/eval-config.nix");
+        in
+          (nixosSystem {
+            # we use pkgs built for and *by* the target, i.e. emulation, by default.
+            # cross compilation only happens on explicit access to `pkgs.cross`
+            system = target;
             modules = [
-          ./configuration.nix
-          ./machines/${name}
-          (import ./helpers/set-hostname.nix name)
-          (self.overlaysModule system)
-        ] ++ extraModules;
+              (import ./hosts/instantiate.nix { localSystem = local; hostName = name; })
+              self.nixosModules.default
+              self.nixosModules.passthru
+              {
+                nixpkgs.overlays = [
+                  self.overlays.default
+                  self.overlays.passthru
+                  self.overlays.pins
+                ];
+              }
+            ];
           });
-
-    # this produces a EFI-bootable .img file (GPT with / and /boot).
-    # after building this, steps are:
-    #   run `btrfs-convert --uuid copy <device>`
-    #   boot, checkout this flake into /etc/nixos AND UPDATE THE UUIDS IT REFERENCES.
-    #   then `nixos-rebuild ...`
-    decl-img = { name, system, extraModules ? [] }: (
-      (self.decl-machine { inherit name; inherit system; extraModules = extraModules ++ [./image.nix]; })
-        .config.system.build.raw
-    );
-
-    decl-bootable-machine = { name, system }: {
-      nixosConfiguration = self.decl-machine { inherit name; inherit system; };
-      img = self.decl-img { inherit name; inherit system; };
+    in {
+      nixosConfigurations = {
+        servo = evalHost { name = "servo"; local = "x86_64-linux"; target = "x86_64-linux"; };
+        desko = evalHost { name = "desko"; local = "x86_64-linux"; target = "x86_64-linux"; };
+        lappy = evalHost { name = "lappy"; local = "x86_64-linux"; target = "x86_64-linux"; };
+        moby = evalHost { name = "moby"; local = "aarch64-linux"; target = "aarch64-linux"; };
+        # special cross-compiled variant, to speed up deploys from an x86 box to the arm target
+        # note that these *do* produce different store paths, because the closure for the tools used to cross compile
+        # v.s. emulate differ.
+        # so deploying foo-cross and then foo incurs some rebuilding.
+        moby-cross = evalHost { name = "moby"; local = "x86_64-linux"; target = "aarch64-linux"; };
+        rescue = evalHost { name = "rescue"; local = "x86_64-linux"; target = "x86_64-linux"; };
       };
 
-    overlaysModule = system: { config, pkgs, ...}: {
-      nixpkgs.config.allowUnfree = true;
+      # unofficial output
+      # this produces a EFI-bootable .img file (GPT with a /boot partition and a system (/ or /nix) partition).
+      # after building this:
+      #   - flash it to a bootable medium (SD card, flash drive, HDD)
+      #   - resize the root partition (use cfdisk)
+      #   - mount the part
+      #      - chown root:nixbld <part>/nix/store
+      #      - chown root:root -R <part>/nix/store/*
+      #      - chown root:root -R <part>/persist  # if using impermanence
+      #      - populate any important things (persist/, home/colin/.ssh, etc)
+      #   - boot
+      #   - if fs wasn't resized automatically, then `sudo btrfs filesystem resize max /`
+      #   - checkout this flake into /etc/nixos AND UPDATE THE FS UUIDS.
+      #   - `nixos-rebuild --flake './#<host>' switch`
+      imgs = builtins.mapAttrs (_: host-dfn: host-dfn.config.system.build.img) self.nixosConfigurations;
 
-      nixpkgs.overlays = [
-        #mobile-nixos.overlay
-        nurpkgs.overlay
-        (next: prev: {
-          #### customized packages
-          # nixos-unstable pleroma is too far out-of-date for our db
-          pleroma = prev.callPackage ./pkgs/pleroma { };
-          # jackett doesn't allow customization of the bind address: this will probably always be here.
-          jackett = next.callPackage ./pkgs/jackett { pkgs = prev; };
-          # fix abrupt HDD poweroffs as during reboot. patching systemd requires rebuilding nearly every package.
-          # systemd = import ./pkgs/systemd { pkgs = prev; };
+      overlays = rec {
+        default = pkgs;
+        pkgs = import ./overlays/pkgs.nix;
+        pins = import ./overlays/pins.nix;  # TODO: move to `nixpatches/` input
+        passthru =
+          let
+            stable = next: prev: {
+              stable = nixpkgs-stable.legacyPackages."${prev.stdenv.hostPlatform.system}";
+            };
+            mobile = (import "${mobile-nixos}/overlay/overlay.nix");
+            uninsane = uninsane-dot-org.overlay;
+          in
+            next: prev:
+              (stable next prev) // (mobile next prev) // (uninsane next prev);
+      };
 
-          # patch rpi uboot with something that fixes USB HDD boot
-          ubootRaspberryPi4_64bit = next.callPackage ./pkgs/ubootRaspberryPi4_64bit { pkgs = prev; };
-
-          #### TEMPORARY NIXOS-UNSTABLE PACKAGES
-
-          # stable telegram doesn't build, so explicitly use the stable one.
-          # TODO: apply this specifically to the moby build?
-          # tdesktop = pkgs-telegram.legacyPackages.${system}.tdesktop;
-          tdesktop = nixpkgs.legacyPackages.${system}.tdesktop;
-
-          #### TEMPORARY: PACKAGES WAITING TO BE UPSTREAMED
-          whalebird = prev.callPackage ./pkgs/whalebird { };
-        })
+      nixosModules = rec {
+        default = sane;
+        sane = import ./modules;
+        passthru = { ... }: {
+          imports = [
+            home-manager.nixosModule
+            sops-nix.nixosModules.sops
           ];
         };
       };
+
+      # this includes both our native packages and all the nixpkgs packages.
+      legacyPackages =
+        let
+          allPkgsFor = sys: (nixpkgsCompiledBy sys).appendOverlays [
+            self.overlays.passthru self.overlays.pkgs
+          ];
+        in {
+          x86_64-linux = allPkgsFor "x86_64-linux";
+          aarch64-linux = allPkgsFor "aarch64-linux";
+        };
+
+      # extract only our own packages from the full set
+      packages = builtins.mapAttrs
+        (_: full: full.sane // { inherit (full) sane uninsane-dot-org; })
+        self.legacyPackages;
+
+      apps."x86_64-linux" =
+        let
+          pkgs = self.legacyPackages."x86_64-linux";
+        in {
+          update-feeds = {
+            type = "app";
+            program = "${pkgs.feeds.passthru.updateScript}";
+          };
+
+          init-feed = {
+            # use like `nix run '.#init-feed' uninsane.org`
+            type = "app";
+            program = "${pkgs.feeds.passthru.initFeedScript}";
+          };
+        };
+
+      templates = {
+        python-data = {
+          # initialize with:
+          # - `nix flake init -t '/home/colin/dev/nixos/#python-data'`
+          # then enter with:
+          # - `nix develop`
+          path = ./templates/python-data;
+          description = "python environment for data processing";
+        };
+      };
+    };
 }
 

helpers/gui/gnome.nix

@@ -1,13 +0,0 @@
-{ config, pkgs, lib, ... }:
-
-{
-  # start gnome/gdm on boot
-  services.xserver.enable = true;
-  services.xserver.desktopManager.gnome.enable = true;
-  services.xserver.displayManager.gdm.enable = true;
-
-  # gnome does networking stuff with networkmanager
-  networking.useDHCP = false;
-  networking.networkmanager.enable = true;
-  networking.wireless.enable = lib.mkForce false;
-}

helpers/gui/i3.nix

@@ -1,16 +0,0 @@
-{ pkgs, ... }:
-{
-  environment.pathsToLink = [ "/libexec" ];  # patch for i3blocks to work
-  services.xserver.enable = true;
-  services.xserver.displayManager.defaultSession = "none+i3";
-  services.xserver.windowManager.i3 = {
-    enable = true;
-    extraPackages = with pkgs; [
-      dmenu
-      i3status
-      i3lock
-      i3blocks
-    ];
-  };
-}
-

helpers/gui/phosh.nix

@@ -1,21 +0,0 @@
-{ ... }:
-{
-  # docs: https://github.com/NixOS/nixpkgs/blob/nixos-22.05/nixos/modules/services/x11/desktop-managers/phosh.nix
-  services.xserver.desktopManager.phosh = {
-    enable = true;
-    user = "colin";
-    group = "users";
-    phocConfig = {
-      xwayland = "true";
-      # find default outputs by catting /etc/phosh/phoc.ini
-      outputs.DSI-1 = {
-        scale = 1.5;
-      };
-    };
-  };
-
-  environment.variables = {
-    # Qt apps won't always start unless this env var is set
-    QT_QPA_PLATFORM = "wayland";
-  };
-}

helpers/gui/plasma-mobile.nix

@@ -1,14 +0,0 @@
-{ config, pkgs, lib, ... }:
- 
-{
-  # start plasma-mobile on boot
-  services.xserver.enable = true;
-  services.xserver.desktopManager.plasma5.mobile.enable = true;
-  services.xserver.desktopManager.plasma5.mobile.installRecommendedSoftware = false;  # not all plasma5-mobile packages build for aarch64
-  services.xserver.displayManager.sddm.enable = true;
- 
-  # Plasma does networking stuff with networkmanager, but nix configures the defaults itself
-  # networking.useDHCP = false;
-  # networking.networkmanager.enable = true;
-  # networking.wireless.enable = lib.mkForce false;
-}

helpers/gui/sway.nix

@@ -1,31 +0,0 @@
-{ pkgs, ... }:
- 
-# docs: https://nixos.wiki/wiki/Sway
-{
-  programs.sway = {
-    # we configure sway with home-manager, but this enable gets us e.g. opengl and fonts
-    enable = true;
-  };
-
-  # TODO: should be able to use SDDM to get interactive login
-  services.greetd = {
-    enable = true;
-    settings = rec {
-      initial_session = {
-        command = "${pkgs.sway}/bin/sway";
-        user = "colin";
-      };
-      default_session = initial_session;
-    };
-  };
-
-  # unlike other DEs, sway configures no audio stack
-  # administer with pw-cli, pw-mon, pw-top commands
-  services.pipewire = {
-    enable = true;
-    alsa.enable = true;
-    alsa.support32Bit = true;  # ??
-    pulse.enable = true;
-  };
-}
-

helpers/hardware-x86_64.nix

@@ -1,65 +0,0 @@
-{ config, pkgs, lib, ... }:
-
-{
-  boot.initrd.availableKernelModules = [
-    "xhci_pci" "ahci" "sd_mod" "sdhci_pci"  # nixos-generate-config defaults
-    "usb_storage"   # rpi needed this to boot from usb storage, i think.
-    # "usbhid" "hid-generic"  # hopefully these will fix USB HID auto-sleep ?
-  ];
-  boot.initrd.kernelModules = [ ];
-  boot.initrd.supportedFilesystems = [ "ext4" "btrfs" "ext2" "ext3" "vfat" ];
-  # find more of these with sensors-detect
-  boot.kernelModules = [
-    "coretemp"
-    "kvm-intel"
-    "kvm-amd"  # desktop
-    "amdgpu"   # desktop
-  ];
-  boot.extraModulePackages = [ ];
-  boot.kernelParams = [ "boot.shell_on_fail" ];
-  boot.consoleLogLevel = 7;
-
-  # Use the systemd-boot EFI boot loader.
-  boot.loader.systemd-boot.enable = true;
-  boot.loader.systemd-boot.configurationLimit = 40;  # keep this many generations
-  boot.loader.efi.canTouchEfiVariables = true;
-
-  # enable cross compilation
-  boot.binfmt.emulatedSystems = [ "aarch64-linux" ];
-  # nixpkgs.crossSystem.system = "aarch64-linux";
-
-  powerManagement.cpuFreqGovernor = "powersave";
-  hardware.enableRedistributableFirmware = true;
-  hardware.cpu.amd.updateMicrocode = true;    # desktop
-  hardware.cpu.intel.updateMicrocode = true;  # laptop
-  services.fwupd.enable = true;
-  # powertop will default to putting USB devices -- including HID -- to sleep after TWO SECONDS
-  powerManagement.powertop.enable = false;
-
-  hardware.opengl.extraPackages = [
-    # laptop
-    pkgs.intel-compute-runtime
-    pkgs.intel-media-driver  # new
-    pkgs.libvdpau-va-gl      # new
-    pkgs.vaapiIntel
-    # desktop
-    pkgs.rocm-opencl-icd
-    pkgs.rocm-opencl-runtime
-  ];
-  hardware.opengl.driSupport = true;
-  # For 32 bit applications
-  hardware.opengl.driSupport32Bit = true;
-
-  # TODO colin: does this *do* anything?
-  swapDevices = [ ];
-
-  # services.snapper.configs = {
-  #   root = {
-  #     subvolume = "/";
-  #     extraConfig = {
-  #       ALLOW_USERS = "colin";
-  #     };
-  #   };
-  # };
-  # services.snapper.snapshotInterval = "daily";
-}

helpers/home-manager-gen-colin.nix

@@ -1,531 +0,0 @@
-# docs:
-#   https://rycee.gitlab.io/home-manager/
-#   https://rycee.gitlab.io/home-manager/options.html
-#   man home-configuration.nix
-#
-
-# system is e.g. x86_64-linux
-# gui is "gnome", or null
-{ lib, pkgs, system, gui, extraPackages ? [] }: {
-  home.stateVersion = "21.11";
-  home.username = "colin";
-  home.homeDirectory = "/home/colin";
-  programs.home-manager.enable = true;  # this lets home-manager manage dot-files in user dirs, i think
-
-  # XDG defines things like ~/Desktop, ~/Downloads, etc.
-  # these clutter the home, so i mostly don't use them.
-  xdg.userDirs = {
-    enable = true;
-    createDirectories = false;  # on headless systems, most xdg dirs are noise
-    desktop = "$HOME/.xdg/Desktop";
-    documents = "$HOME/src";
-    download = "$HOME/tmp";
-    music = "$HOME/Music";
-    pictures = "$HOME/Pictures";
-    publicShare = "$HOME/.xdg/Public";
-    templates = "$HOME/.xdg/Templates";
-    videos = "$HOME/Videos";
-  };
-
-  programs.zsh = {
-    enable = true;
-    enableSyntaxHighlighting = true;
-    enableVteIntegration = true;
-    dotDir = ".config/zsh";
-
-    initExtraBeforeCompInit = ''
-      # p10k instant prompt
-      # run p10k configure to configure, but it can't write out its file :-(
-      POWERLEVEL9K_DISABLE_CONFIGURATION_WIZARD=true
-    '';
-
-    # prezto = oh-my-zsh fork; controls prompt, auto-completion, etc.
-    # see: https://github.com/sorin-ionescu/prezto
-    prezto = {
-      enable = true;
-      pmodules = [
-        "environment"
-        "terminal"
-        "editor"
-        "history"
-        "directory"
-        "spectrum"
-        "utility"
-        "completion"
-        "prompt"
-        "git"
-      ];
-      prompt = {
-        theme = "powerlevel10k";
-      };
-    };
-  };
-  programs.kitty.enable = true;
-  programs.git = {
-    enable = true;
-    userName = "colin";
-    userEmail = "colin@uninsane.org";
-  };
-
-  programs.vim = {
-    enable = true;
-    extraConfig = ''
-      " wtf vim project: NOBODY LIKES MOUSE FOR VISUAL MODE
-      set mouse-=a
-      " copy/paste to system clipboard
-      set clipboard=unnamedplus
-      " <tab> completion menu settings
-      set wildmenu
-      set wildmode=longest,list,full
-      " highlight all matching searches (using / and ?)
-      set hlsearch
-      " allow backspace to delete empty lines in insert mode
-      set backspace=indent,eol,start
-      " built-in syntax highlighting
-      syntax enable
-      " show line/col number in bottom right
-      set ruler
-      " highlight trailing space & related syntax errors (does this work?)
-      let c_space_errors=1
-      let python_space_errors=1
-    '';
-  };
-
-  # obtain these by running `dconf dump /` after manually customizing gnome
-  # TODO: fix "is not of type `GVariant value'"
-  # dconf.settings = lib.mkIf (gui == "gnome") {
-  #   gnome = {
-  #     # control alt-tab behavior
-  #     "org/gnome/desktop/wm/keybindings" = {
-  #       switch-applications = [ "<Super>Tab" ];
-  #       switch-applications-backward=[];
-  #       switch-windows=["<Alt>Tab"];
-  #       switch-windows-backward=["<Super><Alt>Tab"];
-  #     };
-  #     # idle power savings
-  #     "org/gnome/settings-deamon/plugins/power" = {
-  #       idle-brigthness = 50;
-  #       sleep-inactive-ac-type = "nothing";
-  #       sleep-inactive-battery-timeout = 5400;  # seconds
-  #     };
-  #     "org/gnome/shell" = {
-  #       favorite-apps = [
-  #         "org.gnome.Nautilus.desktop"
-  #         "firefox.desktop"
-  #         "kitty.desktop"
-  #         # "org.gnome.Terminal.desktop"
-  #       ];
-  #     };
-  #     "org/gnome/desktop/session" = {
-  #       # how long until considering a session idle (triggers e.g. screen blanking)
-  #       idle-delay = 900;
-  #     };
-  #     "org/gnome/desktop/interface" = {
-  #       text-scaling-factor = 1.25;
-  #     };
-  #     "org/gnome/desktop/media-handling" = {
-  #       # don't auto-mount inserted media
-  #       automount = false;
-  #       automount-open = false;
-  #     };
-  #   };
-  # };
-
-  # home.pointerCursor = {
-  #   package = pkgs.vanilla-dmz;
-  #   name = "Vanilla-DMZ";
-  # };
-
-  # taken from https://github.com/srid/nix-config/blob/705a70c094da53aa50cf560179b973529617eb31/nix/home/i3.nix
-  xsession.windowManager.i3 = lib.mkIf (gui == "i3") (
-  let
-    mod = "Mod4";
-  in {
-    enable = true;
-    config = {
-      modifier = mod;
-
-      fonts = {
-        names = [ "DejaVu Sans Mono" ];
-        style = "Bold Semi-Condensed";
-        size = 11.0;
-      };
-
-      # terminal = "kitty";
-      # terminal = "${pkgs.kitty}/bin/kitty";
-
-      keybindings = {
-        "${mod}+Return" = "exec ${pkgs.kitty}/bin/kitty";
-        "${mod}+p" = "exec ${pkgs.dmenu}/bin/dmenu_run";
-        "${mod}+x" = "exec sh -c '${pkgs.maim}/bin/maim -s | xclip -selection clipboard -t image/png'";
-        "${mod}+Shift+x" = "exec sh -c '${pkgs.i3lock}/bin/i3lock -c 222222 & sleep 5 && xset dpms force of'";
-
-        # Focus
-        "${mod}+j" = "focus left";
-        "${mod}+k" = "focus down";
-        "${mod}+l" = "focus up";
-        "${mod}+semicolon" = "focus right";
-
-        # Move
-        "${mod}+Shift+j" = "move left";
-        "${mod}+Shift+k" = "move down";
-        "${mod}+Shift+l" = "move up";
-        "${mod}+Shift+semicolon" = "move right";
-
-        # multi monitor setup
-        # "${mod}+m" = "move workspace to output DP-2";
-        # "${mod}+Shift+m" = "move workspace to output DP-5";
-      };
-
-      # bars = [
-      #   {
-      #     position = "bottom";
-      #     statusCommand = "${pkgs.i3status-rust}/bin/i3status-rs ${./i3status-rust.toml}";
-      #   }
-      # ];
-    };
-  });
-
-  wayland.windowManager.sway = lib.mkIf (gui == "sway") {
-    enable = true;
-    wrapperFeatures.gtk = true;
-    config = rec {
-      terminal = "${pkgs.kitty}/bin/kitty";
-      window.border = 3;  # pixel boundary between windows
-
-      # defaults; required for keybindings decl.
-      modifier = "Mod1";
-      # list of launchers: https://www.reddit.com/r/swaywm/comments/v39hxa/your_favorite_launcher/
-      # menu = "${pkgs.dmenu}/bin/dmenu_path";
-      menu = "${pkgs.fuzzel}/bin/fuzzel";
-      # menu = "${pkgs.albert}/bin/albert";
-      left = "h";
-      down = "j";
-      up = "k";
-      right = "l";
-      keybindings = {
-        "${modifier}+Return" = "exec ${terminal}";
-        "${modifier}+Shift+q" = "kill";
-        "${modifier}+d" = "exec ${menu}";
-
-        "${modifier}+${left}" = "focus left";
-        "${modifier}+${down}" = "focus down";
-        "${modifier}+${up}" = "focus up";
-        "${modifier}+${right}" = "focus right";
-
-        "${modifier}+Left" = "focus left";
-        "${modifier}+Down" = "focus down";
-        "${modifier}+Up" = "focus up";
-        "${modifier}+Right" = "focus right";
-
-        "${modifier}+Shift+${left}" = "move left";
-        "${modifier}+Shift+${down}" = "move down";
-        "${modifier}+Shift+${up}" = "move up";
-        "${modifier}+Shift+${right}" = "move right";
-
-        "${modifier}+Shift+Left" = "move left";
-        "${modifier}+Shift+Down" = "move down";
-        "${modifier}+Shift+Up" = "move up";
-        "${modifier}+Shift+Right" = "move right";
-
-        "${modifier}+b" = "splith";
-        "${modifier}+v" = "splitv";
-        "${modifier}+f" = "fullscreen toggle";
-        "${modifier}+a" = "focus parent";
-
-        "${modifier}+s" = "layout stacking";
-        "${modifier}+w" = "layout tabbed";
-        "${modifier}+e" = "layout toggle split";
-
-        "${modifier}+Shift+space" = "floating toggle";
-        "${modifier}+space" = "focus mode_toggle";
-
-        "${modifier}+1" = "workspace number 1";
-        "${modifier}+2" = "workspace number 2";
-        "${modifier}+3" = "workspace number 3";
-        "${modifier}+4" = "workspace number 4";
-        "${modifier}+5" = "workspace number 5";
-        "${modifier}+6" = "workspace number 6";
-        "${modifier}+7" = "workspace number 7";
-        "${modifier}+8" = "workspace number 8";
-        "${modifier}+9" = "workspace number 9";
-
-        "${modifier}+Shift+1" =
-          "move container to workspace number 1";
-        "${modifier}+Shift+2" =
-          "move container to workspace number 2";
-        "${modifier}+Shift+3" =
-          "move container to workspace number 3";
-        "${modifier}+Shift+4" =
-          "move container to workspace number 4";
-        "${modifier}+Shift+5" =
-          "move container to workspace number 5";
-        "${modifier}+Shift+6" =
-          "move container to workspace number 6";
-        "${modifier}+Shift+7" =
-          "move container to workspace number 7";
-        "${modifier}+Shift+8" =
-          "move container to workspace number 8";
-        "${modifier}+Shift+9" =
-          "move container to workspace number 9";
-
-        "${modifier}+Shift+minus" = "move scratchpad";
-        "${modifier}+minus" = "scratchpad show";
-
-        "${modifier}+Shift+c" = "reload";
-        "${modifier}+Shift+e" =
-          "exec swaynag -t warning -m 'You pressed the exit shortcut. Do you really want to exit sway? This will end your Wayland session.' -b 'Yes, exit sway' 'swaymsg exit'";
-
-        "${modifier}+r" = "mode resize";
-      } // {
-        # media keys
-        XF86MonBrightnessDown = ''exec "${pkgs.brightnessctl}/bin/brightnessctl set 2%-"'';
-        XF86MonBrightnessUp = ''exec "${pkgs.brightnessctl}/bin/brightnessctl set +2%"'';
-
-        XF86AudioRaiseVolume = "exec '${pkgs.pulsemixer}/bin/pulsemixer --change-volume +5'";
-        XF86AudioLowerVolume = "exec '${pkgs.pulsemixer}/bin/pulsemixer --change-volume -5'";
-        XF86AudioMute = "exec '${pkgs.pulsemixer}/bin/pulsemixer --toggle-mute'";
-
-      };
-
-      # mostly defaults:
-      bars = [{
-        mode = "dock";
-        hiddenState = "hide";
-        position = "top";
-        command = "${pkgs.waybar}/bin/waybar";
-        workspaceButtons = true;
-        workspaceNumbers = true;
-        statusCommand = "${pkgs.i3status}/bin/i3status";
-        fonts = {
-          names = [ "monospace" ];
-          size = 8.0;
-        };
-        trayOutput = "primary";
-        colors = {
-          background = "#000000";
-          statusline = "#ffffff";
-          separator = "#666666";
-          focusedWorkspace = {
-            border = "#4c7899";
-            background = "#285577";
-            text = "#ffffff";
-          };
-          activeWorkspace = {
-            border = "#333333";
-            background = "#5f676a";
-            text = "#ffffff";
-          };
-          inactiveWorkspace = {
-            border = "#333333";
-            background = "#222222";
-            text = "#888888";
-          };
-          urgentWorkspace = {
-            border = "#2f343a";
-            background = "#900000";
-            text = "#ffffff";
-          };
-          bindingMode = {
-            border = "#2f343a";
-            background = "#900000";
-            text = "#ffffff";
-          };
-        };
-      }];
-    };
-  };
-
-  programs.waybar = lib.mkIf (gui == "sway") {
-    enable = true;
-    # docs: https://github.com/Alexays/Waybar/wiki/Configuration
-    settings = {
-      mainBar = {
-        layer = "top";
-        height = 40;
-        modules-left = ["sway/workspaces" "sway/mode"];
-        modules-center = ["sway/window"];
-        modules-right = ["custom/mediaplayer" "clock" "cpu" "network"];
-        "sway/window" = {
-          max-length = 50;
-        };
-        # include song artist/title. source: https://www.reddit.com/r/swaywm/comments/ni0vso/waybar_spotify_tracktitle/
-        "custom/mediaplayer" = {
-          exec = pkgs.writeShellScript "waybar-mediaplayer" ''
-            player_status=$(${pkgs.playerctl}/bin/playerctl status 2> /dev/null)
-            if [ "$player_status" = "Playing" ]; then
-              echo "$(${pkgs.playerctl}/bin/playerctl metadata artist) - $(${pkgs.playerctl}/bin/playerctl metadata title)"
-            elif [ "$player_status" = "Paused" ]; then
-              echo " $(${pkgs.playerctl}/bin/playerctl metadata artist) - $(${pkgs.playerctl}/bin/playerctl metadata title)"
-            fi
-          '';
-          interval = 2;
-          format = "{}  ";
-          # return-type = "json";
-          on-click = "${pkgs.playerctl}/bin/playerctl play-pause";
-          on-scroll-up = "${pkgs.playerctl}/bin/playerctl next";
-          on-scroll-down = "${pkgs.playerctl}/bin/playerctl previous";
-        };
-        network = {
-          interval = 1;
-          format-ethernet = "{ifname}: {ipaddr}/{cidr}   up: {bandwidthUpBits} down: {bandwidthDownBits}";
-        };
-        cpu = {
-          format = "{usage}% ";
-          tooltip = false;
-        };
-        clock = {
-          format-alt = "{:%a, %d. %b  %H:%M}";
-        };
-      };
-    };
-    # style = ''
-    #   * {
-    #     border: none;
-    #     border-radius: 0;
-    #     font-family: Source Code Pro;
-    #   }
-    #   window#waybar {
-    #     background: #16191C;
-    #     color: #AAB2BF;
-    #   }
-    #   #workspaces button {
-    #     padding: 0 5px;
-    #   }
-    #   .custom-spotify {
-    #     padding: 0 10px;
-    #     margin: 0 4px;
-    #     background-color: #1DB954;
-    #     color: black;
-    #   }
-    # '';
-  };
-
-
-  programs.firefox = lib.mkIf (gui != null) {
-    enable = true;
-
-    profiles.default = {
-      bookmarks = {
-        fed_uninsane.url = "https://fed.uninsane.org/";
-        delightful.url = "https://delightful.club/";
-        crowdsupply.url = "https://www.crowdsupply.com/";
-        linux_phone_apps.url = "https://linuxphoneapps.org/mobile-compatibility/5/";
-        mempool.url = "https://jochen-hoenicke.de/queue";
-      };
-    };
-
-    # firefox profile support seems to be broken :shrug:
-    # profiles.other = {
-    #   id = 2;
-    # };
-
-    # NB: these must be manually enabled in the Firefox settings on first start
-    # extensions can be found here: https://gitlab.com/rycee/nur-expressions/-/blob/master/pkgs/firefox-addons/addons.json
-    extensions = [
-      pkgs.nur.repos.rycee.firefox-addons.bypass-paywalls-clean
-      pkgs.nur.repos.rycee.firefox-addons.metamask
-      pkgs.nur.repos.rycee.firefox-addons.i-dont-care-about-cookies
-      pkgs.nur.repos.rycee.firefox-addons.sidebery
-      pkgs.nur.repos.rycee.firefox-addons.sponsorblock
-      pkgs.nur.repos.rycee.firefox-addons.ublock-origin
-    ];
-  };
-
-  home.shellAliases = {
-    ":q" = "exit";
-    # common typos
-    "cd.." = "cd ..";
-    "cd../" = "cd ../";
-  };
-
-
-  home.packages = [
-    pkgs.btrfs-progs
-    pkgs.dig
-    pkgs.cryptsetup
-    pkgs.duplicity
-    pkgs.fatresize
-    pkgs.fd
-    pkgs.file
-    pkgs.gnumake
-    pkgs.gptfdisk
-    pkgs.hdparm
-    pkgs.htop
-    pkgs.iftop
-    pkgs.inetutils  # for telnet
-    pkgs.iotop
-    pkgs.iptables
-    pkgs.jq
-    pkgs.killall
-    pkgs.lm_sensors  # for sensors-detect
-    pkgs.lsof
-    pkgs.mix2nix
-    pkgs.netcat
-    pkgs.nixpkgs-review
-    pkgs.nixUnstable  # TODO: still needed on 22.05?
-    # pkgs.nixos-generators
-    # pkgs.nettools
-    pkgs.nmap
-    pkgs.obsidian
-    pkgs.parted
-    pkgs.pciutils
-    # pkgs.ponymix
-    pkgs.powertop
-    pkgs.pulsemixer
-    pkgs.python3
-    pkgs.ripgrep
-    pkgs.smartmontools
-    pkgs.snapper
-    pkgs.socat
-    pkgs.sudo
-    pkgs.usbutils
-    pkgs.wget
-    pkgs.wireguard-tools
-    pkgs.youtube-dl
-    pkgs.zola
-  ]
-  ++ (if gui != null then
-  [
-    # GUI only
-    pkgs.chromium
-    pkgs.clinfo
-    pkgs.element-desktop  # broken on phosh
-    pkgs.evince  # works on phosh
-    pkgs.font-manager
-    pkgs.gimp  # broken on phosh
-    pkgs.gnome.dconf-editor
-    pkgs.gnome.file-roller
-    pkgs.gnome.gnome-maps  # works on phosh
-    pkgs.gnome.nautilus
-    pkgs.gnome-podcasts
-    pkgs.gnome.gnome-terminal  # works on phosh
-    pkgs.inkscape
-    pkgs.libreoffice-fresh  # XXX colin: maybe don't want this on mobile
-    pkgs.mesa-demos
-    pkgs.playerctl
-    pkgs.tdesktop  # broken on phosh
-    pkgs.vlc  # works on phosh
-    pkgs.whalebird # pleroma client. TODO: port kaiteki to nix: https://craftplacer.moe/projects/kaiteki/
-    pkgs.xterm  # broken on phosh
-  ] else [])
-  ++ (if gui == "sway" then
-  [
-    # TODO: move this to helpers/gui/sway.nix?
-    pkgs.swaylock
-    pkgs.swayidle
-    pkgs.wl-clipboard
-    pkgs.mako # notification daemon
-    # pkgs.dmenu # todo: use wofi?
-    # user stuff
-    # pkgs.pavucontrol
-  ] else [])
-  ++ (if gui != null && system == "x86_64-linux" then
-  [
-    # x86_64 only
-    pkgs.signal-desktop
-    pkgs.spotify
-    pkgs.discord
-  ] else [])
-  ++ extraPackages;
-}

helpers/set-hostname.nix

@@ -1,4 +0,0 @@
-hostName: { ... }:
-{
-  networking.hostName = hostName;
-}

helpers/universal/default.nix

@@ -1,17 +0,0 @@
-{ ... }:
-
-{
-  imports = [
-    ./fs.nix
-    ./home-manager.nix
-    ./nix-cache.nix
-    ./users.nix
-  ];
-
-  time.timeZone = "America/Los_Angeles";
-
-  environment.variables = {
-    EDITOR = "vim";
-  };
-}
-

helpers/universal/fs.nix

@@ -1,25 +0,0 @@
-{ pkgs, ... }:
-
-{
-  fileSystems."/mnt/media-uninsane" = {
-    # device = "sshfs#colin@uninsane.org:/opt/uninsane/media";
-    device = "colin@uninsane.org:/opt/uninsane/media";
-    fsType = "fuse.sshfs";
-    options = [
-      "x-systemd.automount"
-      "_netdev"
-      "user"
-      "idmap=user"
-      "transform_symlinks"
-      "identityfile=/home/colin/.ssh/id_ed25519"
-      "allow_other"
-      "default_permissions"
-      "uid=1000"
-      "gid=1000"
-    ];
-  };
-  environment.systemPackages = [
-    pkgs.sshfs-fuse
-  ];
-}
-

helpers/universal/home-manager.nix

@@ -1,9 +0,0 @@
-{ home-manager, config, pkgs, ... }:
-{
-  imports = [
-    home-manager.nixosModule
-  ];
-
-  home-manager.useGlobalPkgs = true;
-  home-manager.useUserPackages = true;
-}

helpers/universal/nix-cache.nix

@@ -1,16 +0,0 @@
-{ ... }:
-
-{
-  # use our own binary cache
-  nix.settings = {
-    substituters = [
-      "https://nixcache.uninsane.org"
-      "https://nix-community.cachix.org"
-      "https://cache.nixos.org/"
-    ];
-    trusted-public-keys = [
-      "nixcache.uninsane.org:r3WILM6+QrkmsLgqVQcEdibFD7Q/4gyzD9dGT33GP70="
-      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
-    ];
-  };
-}

helpers/universal/users.nix

@@ -1,53 +0,0 @@
-{ config, pkgs, lib, ... }:
-
-# installer docs: https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/profiles/installation-device.nix
-{
-  # Users are exactly these specified here;
-  # old ones will be deleted (from /etc/passwd, etc) upon upgrade.
-  users.mutableUsers = false;
-
-  # docs: https://nixpkgs-manual-sphinx-markedown-example.netlify.app/generated/options-db.xml.html#users-users
-  users.users.colin = {
-    # sets group to "users" (?)
-    isNormalUser = true;
-    home = "/home/colin";
-    uid = 1000;
-    # XXX colin: this is what the installer has, but is it necessary?
-    # group = "users";
-    extraGroups = [
-      "wheel"
-      "nixbuild"
-      "networkmanager"
-      # phosh/mobile. XXX colin: unsure if necessary
-      "video"
-      "feedbackd"
-      "dialout" # required for modem access
-    ];
-    initialPassword = lib.mkDefault "";
-    shell = pkgs.zsh;
-    # shell = pkgs.bashInteractive;
-    # XXX colin: create ssh key for THIS user by logging in and running:
-    #   ssh-keygen -t ed25519
-    openssh.authorizedKeys.keys = [
-      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGSDe/y0e9PSeUwYlMPjzhW0UhNsGAGsW3lCG3apxrD5 colin@colin.desktop"
-      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIG+MZ/l5d8g5hbxMB9ed1uyvhV85jwNrSVNVxb5ujQjw colin@lappy"
-      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPU5GlsSfbaarMvDA20bxpSZGWviEzXGD8gtrIowc1pX colin@desko"
-      # TODO: should probably only let this authenticate to my server
-      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIGCLCA9KbjXaXNNMJJvqbPO5KQQ64JCdG8sg88AfdKzi colin@moby"
-    ];
-  };
-
-  security.sudo = {
-    enable = true;
-    wheelNeedsPassword = false;
-  };
-
-  services.openssh = {
-    enable = true;
-    permitRootLogin = "no";
-    passwordAuthentication = false;
-  };
-
-  # TODO colin: move this somewhere else!
-  programs.vim.defaultEditor = true;
-}

hosts/by-name/desko/default.nix

@@ -0,0 +1,64 @@
+{ config, pkgs, ... }:
+{
+  imports = [
+    ./fs.nix
+  ];
+
+  # sane.packages.enableDevPkgs = true;
+
+  sane.roles.client = true;
+  sane.services.wg-home.enable = true;
+  sane.services.wg-home.ip = config.sane.hosts.by-name."desko".wg-home.ip;
+  sane.services.duplicity.enable = true;
+  sane.services.nixserve.enable = true;
+  sane.services.nixserve.sopsFile = ../../../secrets/desko.yaml;
+  sane.persist.enable = true;
+
+  sane.gui.sway.enable = true;
+
+  boot.loader.efi.canTouchEfiVariables = false;
+  sane.image.extraBootFiles = [ pkgs.bootpart-uefi-x86_64 ];
+
+  # needed to use libimobiledevice/ifuse, for iphone sync
+  services.usbmuxd.enable = true;
+
+  sops.secrets.colin-passwd = {
+    sopsFile = ../../../secrets/desko.yaml;
+    neededForUsers = true;
+  };
+
+  # don't enable wifi by default: it messes with connectivity.
+  systemd.services.iwd.enable = false;
+
+  # default config: https://man.archlinux.org/man/snapper-configs.5
+  # defaults to something like:
+  #   - hourly snapshots
+  #   - auto cleanup; keep the last 10 hourlies, last 10 daylies, last 10 monthlys.
+  services.snapper.configs.nix = {
+    # TODO: for the impermanent setup, we'd prefer to just do /nix/persist,
+    # but that also requires setting up the persist dir as a subvol
+    subvolume = "/nix";
+    # TODO: ALLOW_USERS doesn't seem to work. still need `sudo snapper -c nix list`
+    extraConfig = ''
+      ALLOW_USERS = "colin";
+    '';
+  };
+
+  sops.secrets.duplicity_passphrase = {
+    sopsFile = ../../../secrets/desko.yaml;
+  };
+
+  programs.steam = {
+    enable = true;
+    # not sure if needed: stole this whole snippet from the wiki
+    remotePlay.openFirewall = true; # Open ports in the firewall for Steam Remote Play
+    dedicatedServer.openFirewall = true; # Open ports in the firewall for Source Dedicated Server
+  };
+  sane.persist.home.plaintext = [
+    ".steam"
+    ".local/share/Steam"
+  ];
+
+  # docs: https://nixos.org/manual/nixos/stable/options.html#opt-system.stateVersion
+  system.stateVersion = "21.05";
+}

hosts/by-name/desko/fs.nix

@@ -0,0 +1,31 @@
+{ ... }:
+
+{
+  sane.persist.root-on-tmpfs = true;
+  # we need a /tmp for building large nix things.
+  # a cross-compiled kernel, particularly, will easily use 30+GB of tmp
+  fileSystems."/tmp" = {
+    device = "none";
+    fsType = "tmpfs";
+    options = [
+      "mode=777"
+      "size=64G"
+      "defaults"
+    ];
+  };
+  fileSystems."/nix" = {
+    # device = "/dev/disk/by-uuid/985a0a32-da52-4043-9df7-615adec2e4ff";
+    device = "/dev/disk/by-uuid/0ab0770b-7734-4167-88d9-6e4e20bb2a56";
+    fsType = "btrfs";
+    options = [
+      "compress=zstd"
+      "defaults"
+    ];
+  };
+
+  fileSystems."/boot" = {
+    # device = "/dev/disk/by-uuid/CAA7-E7D2";
+    device = "/dev/disk/by-uuid/41B6-BAEF";
+    fsType = "vfat";
+  };
+}

hosts/by-name/lappy/default.nix

@@ -0,0 +1,40 @@
+{ config, pkgs, ... }:
+{
+  imports = [
+    ./fs.nix
+  ];
+
+  sane.roles.client = true;
+  sane.services.wg-home.enable = true;
+  sane.services.wg-home.ip = config.sane.hosts.by-name."lappy".wg-home.ip;
+
+  # sane.packages.enableDevPkgs = true;
+
+  # sane.users.guest.enable = true;
+  sane.gui.sway.enable = true;
+  sane.persist.enable = true;
+  sane.nixcache.enable = true;
+  boot.loader.efi.canTouchEfiVariables = false;
+  sane.image.extraBootFiles = [ pkgs.bootpart-uefi-x86_64 ];
+
+  sops.secrets.colin-passwd = {
+    sopsFile = ../../../secrets/lappy.yaml;
+    neededForUsers = true;
+  };
+
+  # default config: https://man.archlinux.org/man/snapper-configs.5
+  # defaults to something like:
+  #   - hourly snapshots
+  #   - auto cleanup; keep the last 10 hourlies, last 10 daylies, last 10 monthlys.
+  services.snapper.configs.nix = {
+    # TODO: for the impermanent setup, we'd prefer to just do /nix/persist,
+    # but that also requires setting up the persist dir as a subvol
+    subvolume = "/nix";
+  };
+
+  # TODO: only here for debugging
+  # services.ipfs.enable = true;
+
+  # docs: https://nixos.org/manual/nixos/stable/options.html#opt-system.stateVersion
+  system.stateVersion = "21.05";
+}

hosts/by-name/lappy/fs.nix

@@ -0,0 +1,48 @@
+{ ... }:
+
+{
+  sane.persist.root-on-tmpfs = true;
+  # we need a /tmp of default size (half RAM) for building large nix things
+  fileSystems."/tmp" = {
+    device = "none";
+    fsType = "tmpfs";
+    options = [
+      "mode=777"
+      "defaults"
+    ];
+  };
+
+  fileSystems."/nix" = {
+    device = "/dev/disk/by-uuid/75230e56-2c69-4e41-b03e-68475f119980";
+    fsType = "btrfs";
+    options = [
+      "compress=zstd"
+      "defaults"
+    ];
+  };
+
+  fileSystems."/boot" = {
+    device = "/dev/disk/by-uuid/BD79-D6BB";
+    fsType = "vfat";
+  };
+
+  # fileSystems."/nix" = {
+  #   device = "/dev/disk/by-uuid/5a7fa69c-9394-8144-a74c-6726048b129f";
+  #   fsType = "btrfs";
+  # };
+
+  # fileSystems."/boot" = {
+  #   device = "/dev/disk/by-uuid/4302-1685";
+  #   fsType = "vfat";
+  # };
+
+  # fileSystems."/" = {
+  #   device = "none";
+  #   fsType = "tmpfs";
+  #   options = [
+  #     "mode=755"
+  #     "size=1G"
+  #     "defaults"
+  #   ];
+  # };
+}

hosts/by-name/moby/default.nix

@@ -0,0 +1,101 @@
+{ config, pkgs, lib, ... }:
+{
+  imports = [
+    ./firmware.nix
+    ./fs.nix
+    ./kernel.nix
+  ];
+
+  sane.roles.client = true;
+  sane.services.wg-home.enable = true;
+  sane.services.wg-home.ip = config.sane.hosts.by-name."moby".wg-home.ip;
+
+  # cross-compiled documentation is *slow*.
+  # no obvious way to natively compile docs (2022/09/29).
+  # entrypoint is nixos/modules/misc/documentation.nix
+  # doc building happens in nixos/doc/manual/default.nix
+  # TODO: we could *maybe* inject pkgs.buildPackages.xyz = cross.buildPackages.xyz?
+  documentation.nixos.enable = false;
+
+  # XXX colin: phosh doesn't work well with passwordless login,
+  # so set this more reliable default password should anything go wrong
+  users.users.colin.initialPassword = "147147";
+  services.getty.autologinUser = "root";  # allows for emergency maintenance?
+
+  sops.secrets.colin-passwd = {
+    sopsFile = ../../../secrets/moby.yaml;
+    neededForUsers = true;
+  };
+
+  sane.web-browser = {
+    # compromise impermanence for the sake of usability
+    persistCache = "private";
+    persistData = "private";
+
+    # i don't do crypto stuff on moby
+    addons.ether-metamask.enable = false;
+    # addons.sideberry.enable = false;
+  };
+
+  sane.persist.home.plaintext = [
+    ".config/pulse"  # persist pulseaudio volume
+  ];
+
+  # sane.packages.enableGuiPkgs = false;  # XXX faster builds/imaging for debugging
+  sane.packages.extraUserPkgs = [
+    pkgs.plasma5Packages.konsole  # terminal
+  ];
+
+  sane.nixcache.enable = true;
+  sane.persist.enable = true;
+  sane.gui.phosh.enable = true;
+
+  boot.loader.efi.canTouchEfiVariables = false;
+  # /boot space is at a premium. default was 20.
+  # even 10 can be too much
+  # TODO: compress moby kernels!
+  boot.loader.generic-extlinux-compatible.configurationLimit = 8;
+  # mobile.bootloader.enable = false;
+  # mobile.boot.stage-1.enable = false;
+  # boot.initrd.systemd.enable = false;
+  # boot.initrd.services.swraid.enable = false;  # attempt to fix dm_mod stuff
+  # disable proximity sensor.
+  # the filtering/calibration is bad that it causes the screen to go fully dark at times.
+  boot.blacklistedKernelModules = [ "stk3310" ];
+
+  # without this some GUI apps fail: `DRM_IOCTL_MODE_CREATE_DUMB failed: Cannot allocate memory`
+  # this is because they can't allocate enough video ram.
+  # the default CMA seems to be 32M.
+  # i was running fine with 256MB from 2022/07-ish through 2022/12-ish, but then the phone quit reliably coming back from sleep: maybe a memory leak?
+  # `cat /proc/meminfo` to see CmaTotal/CmaFree if interested in tuning this.
+  boot.kernelParams = [ "cma=512M" ];
+
+  # mobile-nixos' /lib/firmware includes:
+  #   rtl_bt          (bluetooth)
+  #   anx7688-fw.bin  (USB-C -> HDMI bridge)
+  #   ov5640_af.bin   (camera module)
+  # hardware.firmware = [ config.mobile.device.firmware ];
+  hardware.firmware = [ pkgs.rtl8723cs-firmware ];
+
+  system.stateVersion = "21.11";
+
+  # defined: https://www.freedesktop.org/software/systemd/man/machine-info.html
+  # XXX colin: not sure which, if any, software makes use of this
+  environment.etc."machine-info".text = ''
+    CHASSIS="handset"
+  '';
+
+  # enable rotation sensor
+  hardware.sensor.iio.enable = true;
+
+  # from https://gitlab.manjaro.org/manjaro-arm/packages/community/phosh/alsa-ucm-pinephone
+  # mobile-nixos does this same thing, with *slightly different settings*.
+  # i trust manjaro more because the guy maintaining that is actively trying to upstream into alsa-ucm-conf.
+  # an alternative may be to build a custom alsa with the PinePhone config patch applied:
+  # - <https://github.com/alsa-project/alsa-ucm-conf/pull/134>
+  # that would make this be not device-specific
+  environment.variables.ALSA_CONFIG_UCM2 = "${./ucm2}";
+  systemd.services.pulseaudio.environment.ALSA_CONFIG_UCM2 = "${./ucm2}";
+
+  hardware.opengl.driSupport = true;
+}

hosts/by-name/moby/firmware.nix

@@ -0,0 +1,12 @@
+{ config, pkgs, ... }:
+{
+  # we need space in the GPT header to place tow-boot.
+  # only actually need 1 MB, but better to over-allocate than under-allocate
+  sane.image.extraGPTPadding = 16 * 1024 * 1024;
+  sane.image.firstPartGap = 0;
+  system.build.img = pkgs.runCommand "nixos_full-disk-image.img" {} ''
+    cp -v ${config.system.build.img-without-firmware}/nixos.img $out
+    chmod +w $out
+    dd if=${pkgs.tow-boot-pinephone}/Tow-Boot.noenv.bin of=$out bs=1024 seek=8 conv=notrunc
+  '';
+}

hosts/by-name/moby/fs.nix

@@ -0,0 +1,18 @@
+{ ... }:
+
+{
+  sane.persist.root-on-tmpfs = true;
+  fileSystems."/nix" = {
+    device = "/dev/disk/by-uuid/1f1271f8-53ce-4081-8a29-60a4a6b5d6f9";
+    fsType = "btrfs";
+    options = [
+      "compress=zstd"
+      "defaults"
+    ];
+  };
+
+  fileSystems."/boot" = {
+    device = "/dev/disk/by-uuid/0299-F1E5";
+    fsType = "vfat";
+  };
+}

hosts/by-name/moby/kernel.nix

@@ -0,0 +1,146 @@
+{ lib, pkgs, ... }:
+let
+  # use the last commit on the 5.18 branch (5.18.14)
+  # manjaro's changes between kernel patch versions tend to be minimal if any.
+  manjaroBase = "https://gitlab.manjaro.org/manjaro-arm/packages/core/linux/-/raw/25bd828cd47b1c6e09fcbcf394a649b89d2876dd";
+  manjaroPatch = name: sha256: {
+    inherit name;
+    patch = pkgs.fetchpatch {
+      inherit name;
+      url = "${manjaroBase}/${name}?inline=false";
+      inherit sha256;
+    };
+  };
+
+  # the idea for patching off Manjaro's kernel comes from jakewaksbaum:
+  # - https://git.sr.ht/~jakewaksbaum/pi/tree/af20aae5653545d6e67a459b59ee3e1ca8a680b0/item/kernel/default.nix
+  # - he later abandoned this, i think because he's using the Pinephone Pro which received mainline support.
+  manjaroPatches = [
+    (manjaroPatch
+      "1001-arm64-dts-allwinner-add-hdmi-sound-to-pine-devices.patch"
+      "sha256-DApd791A+AxB28Ven/MVAyuyVphdo8KQDx8O7oxVPnc="
+    )
+    # these patches below are critical to enable wifi (RTL8723CS)
+    # - the alternative is a wholly forked kernel by megi/megous:
+    #   - https://xnux.eu/howtos/build-pinephone-kernel.html#toc-how-to-build-megi-s-pinehpone-kernel
+    # - i don't know if these patches are based on megi's or original
+    (manjaroPatch
+      "2001-Bluetooth-Add-new-quirk-for-broken-local-ext-features.patch"
+      "sha256-CExhJuUWivegxPdnzKINEsKrMFx/m/1kOZFmlZ2SEOc="
+    )
+    (manjaroPatch
+      "2002-Bluetooth-btrtl-add-support-for-the-RTL8723CS.patch"
+      "sha256-dDdvOphTcP/Aog93HyH+L9m55laTgtjndPSE4/rnzUA="
+    )
+    (manjaroPatch
+      "2004-arm64-dts-allwinner-enable-bluetooth-pinetab-pinepho.patch"
+      "sha256-o43P3WzXyHK1PF+Kdter4asuyGAEKO6wf5ixcco2kCQ="
+    )
+    # XXX: this one has a Makefile, which hardcodes /sbin/depmod:
+    # - drivers/staging/rtl8723cs/Makefile
+    # - not sure if this is problematic?
+    (manjaroPatch
+      "2005-staging-add-rtl8723cs-driver.patch"
+      "sha256-6ywm3dQQ5JYl60CLKarxlSUukwi4QzqctCj3tVgzFbo="
+    )
+  ];
+
+  # pinephone uses the linux dtb at arch/arm64/boot/dts/allwinner/sun50i-a64-pinephone.dtsi
+  # - this includes sun50i-a64.dtsi
+  # - and sun50i-a64-cpu-opp.dtsi
+  # - no need to touch the allwinner-h6 stuff: that's the SBC pine product
+  # - i think it's safe to ignore sun9i stuff, but i don't know what it is
+  kernelConfig = with lib.kernel; {
+    # NB: nix adds the CONFIG_ prefix to each of these.
+    # if you add the prefix yourself nix will IGNORE YOUR CONFIG.
+    RTL8723CS = module;
+    BT_HCIUART_3WIRE = yes;
+    BT_HCIUART_RTL = yes;
+    RTL8XXXU_UNTESTED = yes;
+    BT_BNEP_MC_FILTER = yes;
+    BT_BNEP_PROTO_FILTER = yes;
+    BT_HS = yes;
+    BT_LE = yes;
+    # relevant configs inherited from nixos defaults (or above additions):
+    # CONFIG_BT=m
+    # CONFIG_BT_BREDR=y
+    # CONFIG_BT_RFCOMM=m
+    # CONFIG_BT_RFCOMM_TTY=y
+    # CONFIG_BT_BNEP=m
+    # CONFIG_BT_HIDP=m
+    # CONFIG_BT_RTL=m
+    # CONFIG_BT_HCIBTUSB=m
+    # CONFIG_BT_HCIBTUSB_BCM=y
+    # CONFIG_BT_HCIBTUSB_RTL=y
+    # CONFIG_BT_HCIUART=m
+    # CONFIG_BT_HCIUART_SERDEV=y
+    # CONFIG_BT_HCIUART_H4=y
+    # CONFIG_BT_HCIUART_LL=y
+    # CONFIG_RTL_CARDS=m
+    # CONFIG_RTLWIFI=m
+    # CONFIG_RTLWIFI_PCI=m
+    # CONFIG_RTLWIFI_USB=m
+    # CONFIG_RTLWIFI_DEBUG=y
+    # CONFIG_RTL8723_COMMON=m
+    # CONFIG_RTLBTCOEXIST=m
+    # CONFIG_RTL8XXXU=m
+    # CONFIG_RTLLIB=m
+    # consider adding (from mobile-nixos):
+    # maybe: CONFIG_BT_HCIUART_3WIRE=y
+    # maybe: CONFIG_BT_HCIUART_RTL=y
+    # maybe: CONFIG_RTL8XXXU_UNTESTED=y
+    # consider adding (from manjaro):
+    # CONFIG_BT_6LOWPAN=m  (not listed as option in nixos kernel)
+    # these are referenced in the rtl8723 source, but not known to config (and not in mobile-nixos config
+    # maybe: CONFIG_RTL_ODM_WLAN_DRIVER
+    # maybe: CONFIG_RTL_TRIBAND_SUPPORT
+    # maybe: CONFIG_SDIO_HCI
+    # maybe: CONFIG_USB_HCI
+  };
+
+  # create a kernelPatch which overrides nixos' defconfig with extra options
+  patchDefconfig = config: {
+    # defconfig options. this method comes from here:
+    # - https://discourse.nixos.org/t/the-correct-way-to-override-the-latest-kernel-config/533/9
+    name = "sane-moby-defconfig";
+    patch = null;
+    extraStructuredConfig = config;
+  };
+in
+{
+  # use Megi's kernel:
+  # even with the Manjaro patches, stock 5.18 has a few issues on Pinephone:
+  # - no battery charging
+  # - phone rotation sensor is off by 90 degrees
+  # - ambient light sensor causes screen brightness to be shakey
+  # - phosh greeter may not appear after wake from sleep
+  boot.kernelPackages = pkgs.cross.linuxPackagesFor pkgs.cross.linux-megous;
+
+  boot.kernelPatches = [
+    (patchDefconfig (kernelConfig //
+      (with lib.kernel; {
+        # disabling the sun5i_eink driver avoids this compilation error:
+        # CC [M]  drivers/video/fbdev/sun5i-eink-neon.o
+        # aarch64-unknown-linux-gnu-gcc: error: unrecognized command line option '-mfloat-abi=softfp'
+        # aarch64-unknown-linux-gnu-gcc: error: unrecognized command line option '-mfpu=neon'
+        # make[3]: *** [../scripts/Makefile.build:289: drivers/video/fbdev/sun5i-eink-neon.o] Error 1
+        FB_SUN5I_EINK = no;
+        # used by the pinephone pro, but fails to compile with:
+        # ../drivers/media/i2c/ov8858.c:1834:27: error: implicit declaration of function 'compat_ptr'
+        VIDEO_OV8858 = no;
+      })
+    ))
+  ];
+
+  # alternatively, use nixos' kernel and add the stuff we want:
+  # # cross-compilation optimization:
+  # boot.kernelPackages =
+  #   let p = (import nixpkgs { localSystem = "x86_64-linux"; });
+  #   in p.pkgsCross.aarch64-multiplatform.linuxPackages_5_18;
+  # # non-cross:
+  # # boot.kernelPackages = pkgs.linuxPackages_5_18;
+
+  # boot.kernelPatches = manjaroPatches ++ [
+  #   (patchDefconfig kernelConfig)
+  # ];
+}

hosts/by-name/moby/ucm2/PinePhone/HiFi.conf

@@ -0,0 +1,148 @@
+SectionVerb {
+	EnableSequence [
+		cset "name='Headphone Playback Switch' off"
+		cset "name='Headphone Source Playback Route' DAC"
+		cset "name='Line In Playback Switch' off"
+		cset "name='Line Out Playback Switch' off"
+		cset "name='Line Out Source Playback Route' Mono Differential"
+		cset "name='Mic1 Playback Switch' off"
+		cset "name='Mic2 Playback Switch' off"
+		cset "name='AIF1 DA0 Playback Volume' 160"
+		cset "name='AIF3 ADC Source Capture Route' None"
+		cset "name='AIF2 DAC Source Playback Route' AIF2"
+		cset "name='DAC Playback Switch' on"
+		cset "name='DAC Playback Volume' 160"
+		cset "name='ADC Digital DAC Playback Switch' off"
+		cset "name='AIF1 Slot 0 Digital DAC Playback Switch' on"
+		cset "name='AIF2 Digital DAC Playback Switch' off"
+		cset "name='DAC Reversed Playback Switch' off"
+		cset "name='Earpiece Playback Switch' off"
+		cset "name='Earpiece Source Playback Route' DACL"
+
+		cset "name='Line In Capture Switch' off"
+		cset "name='Mic1 Capture Switch' off"
+		cset "name='Mic1 Boost Volume' 7"
+		cset "name='Mic2 Capture Switch' off"
+		cset "name='Mic2 Boost Volume' 7"
+		cset "name='Mixer Capture Switch' off"
+		cset "name='Mixer Reversed Capture Switch' off"
+		cset "name='ADC Capture Volume' 160"
+		cset "name='ADC Gain Capture Volume' 7"
+		cset "name='AIF1 AD0 Capture Volume' 160"
+		cset "name='AIF1 Data Digital ADC Capture Switch' on"
+		cset "name='AIF2 ADC Mixer ADC Capture Switch' off"
+		cset "name='AIF2 ADC Mixer AIF1 DA0 Capture Switch' off"
+		cset "name='AIF2 ADC Mixer AIF2 DAC Rev Capture Switch' off"
+		cset "name='AIF2 ADC Mixer AIF1 DA0 Capture Switch' off"
+		cset "name='AIF2 ADC Mixer AIF1 DA0 Capture Switch' off"
+	]
+
+        DisableSequence [
+        ]
+
+	Value {
+	}
+}
+
+SectionDevice."Speaker" {
+	Comment "Internal speaker"
+	EnableSequence [
+		cset "name='AIF1 DA0 Stereo Playback Route' Mix Mono"
+		cset "name='Line Out Playback Switch' on"
+		cset "name='Line Out Playback Volume' 100%"
+	]
+
+	DisableSequence [
+		cset "name='Line Out Playback Switch' off"
+	]
+
+	Value {
+		PlaybackVolume "Line Out Playback Volume"
+		PlaybackSwitch "Line Out Playback Switch"
+		PlaybackChannels 2
+		PlaybackPriority 300
+		PlaybackPCM "hw:${CardId},0"
+	}
+}
+SectionDevice."Earpiece" {
+	Comment "Internal Earpiece"
+	EnableSequence [
+		cset "name='AIF1 DA0 Stereo Playback Route' Mix Mono"
+		cset "name='Earpiece Playback Switch' on"
+		cset "name='Earpiece Playback Volume' 100%"
+	]
+
+	DisableSequence [
+		cset "name='Earpiece Playback Switch' off"
+	]
+
+	Value {
+		PlaybackVolume "Earpiece Playback Volume"
+		PlaybackSwitch "Earpiece Playback Switch"
+		PlaybackChannels 2
+		PlaybackPriority 200
+		PlaybackPCM "hw:${CardId},0"
+	}
+}
+SectionDevice."Mic" {
+	Comment "Internal Microphone"
+	ConflictingDevice [
+		"Headset"
+	]
+	EnableSequence [
+		cset "name='Mic1 Capture Switch' on"
+	]
+	DisableSequence [
+		cset "name='Mic1 Capture Switch' off"
+	]
+	Value {
+		CapturePriority 100
+		CapturePCM "hw:${CardId},0"
+		CaptureChannels 2
+		CaptureMixerElem "ADC"
+		CaptureVolume "ADC Capture Volume"
+		CaptureSwitch "Mic1 Capture Switch"
+	}
+}
+SectionDevice."Headset" {
+	Comment "Headset Microphone"
+	ConflictingDevice [
+		"Mic"
+	]
+	EnableSequence [
+		cset "name='Mic2 Capture Switch' on"
+	]
+	DisableSequence [
+		cset "name='Mic2 Capture Switch' off"
+	]
+	Value {
+		CapturePriority 500
+		CapturePCM "hw:${CardId},0"
+		CaptureChannels 2
+		CaptureMixerElem "ADC"
+		CaptureVolume "ADC Capture Volume"
+		CaptureSwitch "Mic2 Capture Switch"
+		JackControl "Headset Microphone Jack"
+	}
+}
+SectionDevice."Headphones" {
+	Comment "Headphones"
+	EnableSequence [
+		cset "name='AIF1 DA0 Stereo Playback Route' Stereo"
+		cset "name='Headphone Playback Switch' on"
+		cset "name='Headphone Playback Volume' 70%"
+	]
+
+	DisableSequence [
+		cset "name='Headphone Playback Switch' off"
+	]
+
+	Value {
+		PlaybackVolume "Headphone Playback Volume"
+		PlaybackSwitch "Headphone Playback Switch"
+		PlaybackChannels 2
+		PlaybackPriority 500
+		PlaybackPCM "hw:${CardId},0"
+		JackControl "Headphone Jack"
+	}
+}

hosts/by-name/moby/ucm2/PinePhone/PinePhone.conf

@@ -0,0 +1,11 @@
+Syntax 2
+
+SectionUseCase."HiFi" {
+	File "HiFi.conf"
+	Comment "Default"
+}
+
+SectionUseCase."Voice Call" {
+	File "VoiceCall.conf"
+	Comment "Phone call"
+}

hosts/by-name/moby/ucm2/PinePhone/VoiceCall.conf

@@ -0,0 +1,153 @@
+SectionVerb {
+	EnableSequence [
+		cset "name='Headphone Playback Switch' off"
+		cset "name='Headphone Source Playback Route' DAC"
+		cset "name='Line In Playback Switch' off"
+		cset "name='Line Out Playback Switch' off"
+		cset "name='Line Out Source Playback Route' Mono Differential"
+		cset "name='Mic1 Playback Switch' off"
+		cset "name='Mic2 Playback Switch' off"
+		cset "name='AIF1 DA0 Playback Volume' 160"
+		cset "name='AIF2 DAC Playback Volume' 160"
+		cset "name='AIF3 ADC Source Capture Route' None"
+		cset "name='AIF2 DAC Source Playback Route' AIF2"
+		cset "name='DAC Playback Switch' on"
+		cset "name='DAC Playback Volume' 160"
+		cset "name='ADC Digital DAC Playback Switch' off"
+		cset "name='AIF1 Slot 0 Digital DAC Playback Switch' on"
+		cset "name='AIF2 Digital DAC Playback Switch' on"
+		cset "name='DAC Reversed Playback Switch' off"
+		cset "name='Earpiece Playback Switch' off"
+		cset "name='Earpiece Source Playback Route' DACL"
+
+		cset "name='Line In Capture Switch' off"
+		cset "name='Mic1 Capture Switch' off"
+		cset "name='Mic1 Boost Volume' 0"
+		cset "name='Mic1 Playback Volume' 7"
+		cset "name='Mic2 Capture Switch' off"
+		cset "name='Mic2 Boost Volume' 0"
+		cset "name='Mic2 Playback Volume' 7"
+		cset "name='Mixer Capture Switch' off"
+		cset "name='Mixer Reversed Capture Switch' off"
+		cset "name='ADC Capture Volume' 160"
+		cset "name='ADC Gain Capture Volume' 7"
+		cset "name='AIF1 AD0 Capture Volume' 160"
+		cset "name='AIF1 Data Digital ADC Capture Switch' on"
+		cset "name='AIF2 ADC Capture Volume' 160"
+		cset "name='AIF2 ADC Mixer ADC Capture Switch' on"
+		cset "name='AIF2 ADC Mixer AIF1 DA0 Capture Switch' off"
+		cset "name='AIF2 ADC Mixer AIF2 DAC Rev Capture Switch' off"
+		cset "name='AIF2 ADC Mixer AIF1 DA0 Capture Switch' off"
+		cset "name='AIF2 ADC Mixer AIF1 DA0 Capture Switch' off"
+	]
+
+        DisableSequence [
+        ]
+
+	Value {
+		PlaybackRate 8000
+	}
+}
+
+SectionDevice."Speaker" {
+	Comment "Internal speaker"
+	EnableSequence [
+		cset "name='AIF1 DA0 Stereo Playback Route' Mix Mono"
+		cset "name='Line Out Playback Switch' on"
+		cset "name='Line Out Playback Volume' 100%"
+	]
+
+	DisableSequence [
+		cset "name='Line Out Playback Switch' off"
+	]
+
+	Value {
+		PlaybackVolume "Line Out Playback Volume"
+		PlaybackSwitch "Line Out Playback Switch"
+		PlaybackChannels 2
+		PlaybackPriority 300
+		PlaybackPCM "hw:${CardId},0"
+	}
+}
+SectionDevice."Earpiece" {
+	Comment "Internal Earpiece"
+	EnableSequence [
+		cset "name='AIF1 DA0 Stereo Playback Route' Mix Mono"
+		cset "name='Earpiece Playback Switch' on"
+		cset "name='Earpiece Playback Volume' 100%"
+	]
+
+	DisableSequence [
+		cset "name='Earpiece Playback Switch' off"
+	]
+
+	Value {
+		PlaybackVolume "Earpiece Playback Volume"
+		PlaybackSwitch "Earpiece Playback Switch"
+		PlaybackChannels 2
+		PlaybackPriority 500
+		PlaybackPCM "hw:${CardId},0"
+	}
+}
+SectionDevice."Mic" {
+	Comment "Internal Microphone"
+	ConflictingDevice [
+		"Headset"
+	]
+	EnableSequence [
+		cset "name='Mic1 Capture Switch' on"
+	]
+	DisableSequence [
+		cset "name='Mic1 Capture Switch' off"
+	]
+	Value {
+		CapturePriority 200
+		CapturePCM "hw:${CardId},0"
+		CaptureMixerElem "ADC"
+		CaptureVolume "ADC Capture Volume"
+		CaptureSwitch "Mic1 Capture Switch"
+		CaptureChannels 2
+	}
+}
+SectionDevice."Headset" {
+	Comment "Headset Microphone"
+	ConflictingDevice [
+		"Mic"
+	]
+	EnableSequence [
+		cset "name='Mic2 Capture Switch' on"
+	]
+	DisableSequence [
+		cset "name='Mic2 Capture Switch' off"
+	]
+	Value {
+		CapturePriority 500
+		CapturePCM "hw:${CardId},0"
+		CaptureChannels 2
+		CaptureMixerElem "ADC"
+		CaptureVolume "ADC Capture Volume"
+		CaptureSwitch "Mic2 Capture Switch"
+		JackControl "Headset Microphone Jack"
+	}
+}
+SectionDevice."Headphones" {
+	Comment "Headphones"
+	EnableSequence [
+		cset "name='AIF1 DA0 Stereo Playback Route' Stereo"
+		cset "name='Headphone Playback Switch' on"
+		cset "name='Headphone Playback Volume' 100%"
+	]
+
+	DisableSequence [
+		cset "name='Headphone Playback Switch' off"
+	]
+
+	Value {
+		PlaybackVolume "Headphone Playback Volume"
+		PlaybackSwitch "Headphone Playback Switch"
+		PlaybackChannels 2
+		PlaybackPriority 500
+		PlaybackPCM "hw:${CardId},0"
+		JackControl "Headphone Jack"
+	}
+}

hosts/by-name/moby/ucm2/ucm.conf

@@ -0,0 +1,8 @@
+Syntax 3
+
+UseCasePath {
+	legacy {
+		Directory "PinePhone"
+		File "PinePhone.conf"
+	}
+}

hosts/by-name/rescue/default.nix

@@ -0,0 +1,13 @@
+{ config, pkgs, ... }:
+{
+  imports = [
+    ./fs.nix
+  ];
+
+  boot.loader.generic-extlinux-compatible.enable = true;
+  boot.loader.efi.canTouchEfiVariables = false;
+  sane.image.extraBootFiles = [ pkgs.bootpart-uefi-x86_64 ];
+
+  # docs: https://nixos.org/manual/nixos/stable/options.html#opt-system.stateVersion
+  system.stateVersion = "21.05";
+}

hosts/by-name/rescue/fs.nix

@@ -0,0 +1,12 @@
+{ ... }:
+
+{
+  fileSystems."/" = {
+    device = "/dev/disk/by-uuid/44445555-6666-7777-8888-999900001111";
+    fsType = "ext4";
+  };
+  fileSystems."/boot" = {
+    device = "/dev/disk/by-uuid/2222-3333";
+    fsType = "vfat";
+  };
+}

hosts/by-name/servo/default.nix

@@ -0,0 +1,44 @@
+{ config, pkgs, ... }:
+
+{
+  imports = [
+    ./fs.nix
+    ./net.nix
+    ./secrets.nix
+    ./services
+  ];
+
+  sane.packages.extraUserPkgs = with pkgs; [
+    # for administering services
+    freshrss
+    matrix-synapse
+    signaldctl
+  ];
+  sane.persist.enable = true;
+  sane.services.dyn-dns.enable = true;
+  sane.services.wg-home.enable = true;
+  sane.services.wg-home.ip = config.sane.hosts.by-name."servo".wg-home.ip;
+  # sane.services.duplicity.enable = true;  # TODO: re-enable after HW upgrade
+
+  # automatically log in at the virtual consoles.
+  # using root here makes sure we always have an escape hatch
+  services.getty.autologinUser = "root";
+
+  boot.loader.efi.canTouchEfiVariables = false;
+  sane.image.extraBootFiles = [ pkgs.bootpart-uefi-x86_64 ];
+
+  # both transmission and ipfs try to set different net defaults.
+  # we just use the most aggressive of the two here:
+  boot.kernel.sysctl = {
+    "net.core.rmem_max" = 4194304;  # 4MB
+  };
+
+  # This value determines the NixOS release from which the default
+  # settings for stateful data, like file locations and database versions
+  # on your system were taken. It‘s perfectly fine and recommended to leave
+  # this value at the release version of the first install of this system.
+  # Before changing this value read the documentation for this option
+  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
+  system.stateVersion = "21.11";
+}
+

hosts/by-name/servo/fs.nix

@@ -0,0 +1,93 @@
+{ ... }:
+
+{
+  sane.persist.root-on-tmpfs = true;
+  # we need a /tmp for building large nix things
+  fileSystems."/tmp" = {
+    device = "none";
+    fsType = "tmpfs";
+    options = [
+      "mode=777"
+      "defaults"
+    ];
+  };
+
+  fileSystems."/nix" = {
+    device = "/dev/disk/by-uuid/cc81cca0-3cc7-4d82-a00c-6243af3e7776";
+    fsType = "btrfs";
+    options = [
+      "compress=zstd"
+      "defaults"
+    ];
+  };
+
+  fileSystems."/boot" = {
+    device = "/dev/disk/by-uuid/6EE3-4171";
+    fsType = "vfat";
+  };
+
+  # slow, external storage (for archiving, etc)
+  fileSystems."/mnt/persist/ext" = {
+    device = "/dev/disk/by-uuid/aa272cff-0fcc-498e-a4cb-0d95fb60631b";
+    fsType = "btrfs";
+    options = [
+      "compress=zstd"
+      "defaults"
+    ];
+  };
+
+  sane.persist.stores."ext" = {
+    origin = "/mnt/persist/ext/persist";
+    storeDescription = "external HDD storage";
+  };
+  sane.fs."/mnt/persist/ext".mount = {};
+
+  sane.persist.sys.plaintext = [
+    # TODO: this is overly broad; only need media and share directories to be persisted
+    { user = "colin"; group = "users"; directory = "/var/lib/uninsane"; }
+  ];
+  # make sure large media is stored to the HDD
+  sane.persist.sys.ext = [
+    {
+      user = "colin";
+      group = "users";
+      mode = "0777";
+      directory = "/var/lib/uninsane/media/Videos";
+    }
+    {
+      user = "colin";
+      group = "users";
+      mode = "0777";
+      directory = "/var/lib/uninsane/media/freeleech";
+    }
+  ];
+
+  # in-memory compressed RAM (seems to be dynamically sized)
+  # zramSwap = {
+  #   enable = true;
+  # };
+
+  # btrfs doesn't easily support swapfiles
+  # swapDevices = [
+  #   { device = "/nix/persist/swapfile"; size = 4096; }
+  # ];
+
+  # this can be a partition. create with:
+  #   fdisk <dev>
+  #     n
+  #     <default partno>
+  #     <start>
+  #     <end>
+  #     t
+  #     <partno>
+  #     19  # set part type to Linux swap
+  #     w   # write changes
+  #   mkswap -L swap <part>
+  # swapDevices = [
+  #   {
+  #     label = "swap";
+  #     # TODO: randomEncryption.enable = true;
+  #   }
+  # ];
+}
+

hosts/by-name/servo/net.nix

@@ -0,0 +1,209 @@
+{ config, pkgs, ... }:
+
+{
+  networking.domain = "uninsane.org";
+
+  # The global useDHCP flag is deprecated, therefore explicitly set to false here.
+  # Per-interface useDHCP will be mandatory in the future, so this generated config
+  # replicates the default behaviour.
+  networking.useDHCP = false;
+  networking.interfaces.eth0.useDHCP = true;
+  # XXX colin: probably don't need this. wlan0 won't be populated unless i touch a value in networking.interfaces.wlan0
+  networking.wireless.enable = false;
+
+  # networking.firewall.enable = false;
+  networking.firewall.enable = true;
+
+  # this is needed to forward packets from the VPN to the host
+  boot.kernel.sysctl."net.ipv4.ip_forward" = 1;
+
+  # unless we add interface-specific settings for each VPN, we have to define nameservers globally.
+  # networking.nameservers = [
+  #   "1.1.1.1"
+  #   "9.9.9.9"
+  # ];
+
+  # use systemd's stub resolver.
+  # /etc/resolv.conf isn't sophisticated enough to use different servers per net namespace (or link).
+  # instead, running the stub resolver on a known address in the root ns lets us rewrite packets
+  # in the ovnps namespace to use the provider's DNS resolvers.
+  # a weakness is we can only query 1 NS at a time (unless we were to clone the packets?)
+  # there also seems to be some cache somewhere that's shared between the two namespaces.
+  # i think this is a libc thing. might need to leverage proper cgroups to _really_ kill it.
+  # - getent ahostsv4 www.google.com
+  # - try fix: <https://serverfault.com/questions/765989/connect-to-3rd-party-vpn-server-but-dont-use-it-as-the-default-route/766290#766290>
+  services.resolved.enable = true;
+  networking.nameservers = [
+    # use systemd-resolved resolver
+    # full resolver (which understands /etc/hosts) lives on 127.0.0.53
+    # stub resolver (just forwards upstream) lives on 127.0.0.54
+    "127.0.0.53"
+  ];
+
+  # nscd -- the Name Service Caching Daemon -- caches DNS query responses
+  # in a way that's unaware of my VPN routing, so routes are frequently poor against
+  # services which advertise different IPs based on geolocation.
+  # nscd claims to be usable without a cache, but in practice i can't get it to not cache!
+  # nsncd is the Name Service NON-Caching Daemon. it's a drop-in that doesn't cache;
+  # this is OK on the host -- because systemd-resolved caches. it's probably sub-optimal
+  # in the netns and we query upstream DNS more often than needed. hm.
+  # TODO: run a separate recursive resolver in each namespace.
+  services.nscd.enableNsncd = true;
+
+  # services.resolved.extraConfig = ''
+  #   # docs: `man resolved.conf`
+  #   # DNS servers to use via the `wg-ovpns` interface.
+  #   #   i hope that from the root ns, these aren't visible.
+  #   DNS=46.227.67.134%wg-ovpns 192.165.9.158%wg-ovpns
+  #   FallbackDNS=1.1.1.1 9.9.9.9
+  # '';
+
+  # OVPN CONFIG (https://www.ovpn.com):
+  # DOCS: https://nixos.wiki/wiki/WireGuard
+  # if you `systemctl restart wireguard-wg-ovpns`, make sure to also restart any other services in `NetworkNamespacePath = .../ovpns`.
+  # TODO: why not create the namespace as a seperate operation (nix config for that?)
+  networking.wireguard.enable = true;
+  networking.wireguard.interfaces.wg-ovpns = let
+    ip = "${pkgs.iproute2}/bin/ip";
+    in-ns = "${ip} netns exec ovpns";
+    iptables = "${pkgs.iptables}/bin/iptables";
+    veth-host-ip = "10.0.1.5";
+    veth-local-ip = "10.0.1.6";
+    vpn-ip = "185.157.162.178";
+    # DNS = 46.227.67.134, 192.165.9.158, 2a07:a880:4601:10f0:cd45::1, 2001:67c:750:1:cafe:cd45::1
+    vpn-dns = "46.227.67.134";
+  in {
+    privateKeyFile = config.sops.secrets.wg_ovpns_privkey.path;
+    # wg is active only in this namespace.
+    # run e.g. ip netns exec ovpns <some command like ping/curl/etc, it'll go through wg>
+    #   sudo ip netns exec ovpns ping www.google.com
+    interfaceNamespace = "ovpns";
+    ips = [
+      "185.157.162.178/32"
+    ];
+    peers = [
+      {
+        publicKey = "SkkEZDCBde22KTs/Hc7FWvDBfdOCQA4YtBEuC3n5KGs=";
+        endpoint = "185.157.162.10:9930";
+        # alternatively: use hostname, but that presents bootstrapping issues (e.g. if host net flakes)
+        # endpoint = "vpn36.prd.amsterdam.ovpn.com:9930";
+        allowedIPs = [ "0.0.0.0/0" ];
+        # nixOS says this is important for keeping NATs active
+        persistentKeepalive = 25;
+        # re-executes wg this often. docs hint that this might help wg notice DNS/hostname changes.
+        # so, maybe that helps if we specify endpoint as a domain name
+        # dynamicEndpointRefreshSeconds = 30;
+        # when refresh fails, try it again after this period instead.
+        # TODO: not avail until nixpkgs upgrade
+        # dynamicEndpointRefreshRestartSeconds = 5;
+      }
+    ];
+    preSetup = "" + ''
+      ${ip} netns add ovpns || echo "ovpns already exists"
+    '';
+    postShutdown = "" + ''
+      ${in-ns} ip link del ovpns-veth-b || echo "couldn't delete ovpns-veth-b"
+      ${ip} link del ovpns-veth-a || echo "couldn't delete ovpns-veth-a"
+      ${ip} netns delete ovpns || echo "couldn't delete ovpns"
+      # restore rules/routes
+      ${ip} rule del from ${veth-host-ip} lookup ovpns pref 50 || echo "couldn't delete init -> ovpns rule"
+      ${ip} route del default via ${veth-local-ip} dev ovpns-veth-a proto kernel src ${veth-host-ip} metric 1002 table ovpns || echo "couldn't delete init -> ovpns route"
+      ${ip} rule add from all lookup local pref 0
+      ${ip} rule del from all lookup local pref 100
+    '';
+    postSetup = "" + ''
+      # DOCS:
+      # - some of this approach is described here: <https://josephmuia.ca/2018-05-16-net-namespaces-veth-nat/>
+      # - iptables primer: <https://danielmiessler.com/study/iptables/>
+      # create veth pair
+      ${ip} link add ovpns-veth-a type veth peer name ovpns-veth-b
+      ${ip} addr add ${veth-host-ip}/24 dev ovpns-veth-a
+      ${ip} link set ovpns-veth-a up
+
+      # mv veth-b into the ovpns namespace
+      ${ip} link set ovpns-veth-b netns ovpns
+      ${in-ns} ip addr add ${veth-local-ip}/24 dev ovpns-veth-b
+      ${in-ns} ip link set ovpns-veth-b up
+
+      # make it so traffic originating from the host side of the veth
+      # is sent over the veth no matter its destination.
+      ${ip} rule add from ${veth-host-ip} lookup ovpns pref 50
+      # for traffic originating at the host veth to the WAN, use the veth as our gateway
+      # not sure if the metric 1002 matters.
+      ${ip} route add default via ${veth-local-ip} dev ovpns-veth-a proto kernel src ${veth-host-ip} metric 1002 table ovpns
+      # give the default route lower priority
+      ${ip} rule add from all lookup local pref 100
+      ${ip} rule del from all lookup local pref 0
+
+      # bridge HTTP traffic:
+      # any external port-80 request sent to the VPN addr will be forwarded to the rootns.
+      # this exists so LetsEncrypt can procure a cert for the MX over http.
+      # TODO: we could use _acme_challence.mx.uninsane.org CNAME to avoid this forwarding
+      # - <https://community.letsencrypt.org/t/where-does-letsencrypt-resolve-dns-from/37607/8>
+      ${in-ns} ${iptables} -A PREROUTING -t nat -p tcp --dport 80 -m iprange --dst-range ${vpn-ip} \
+        -j DNAT --to-destination ${veth-host-ip}:80
+
+      # we also bridge DNS traffic
+      ${in-ns} ${iptables} -A PREROUTING -t nat -p udp --dport 53 -m iprange --dst-range ${vpn-ip} \
+        -j DNAT --to-destination ${veth-host-ip}:53
+      ${in-ns} ${iptables} -A PREROUTING -t nat -p tcp --dport 53 -m iprange --dst-range ${vpn-ip} \
+        -j DNAT --to-destination ${veth-host-ip}:53
+
+      # in order to access DNS in this netns, we need to route it to the VPN's nameservers
+      # - alternatively, we could fix DNS servers like 1.1.1.1.
+      ${in-ns} ${iptables} -A OUTPUT -t nat -p udp --dport 53 -m iprange --dst-range 127.0.0.53 \
+        -j DNAT --to-destination ${vpn-dns}:53
+    '';
+  };
+
+  # create a new routing table that we can use to proxy traffic out of the root namespace
+  # through the ovpns namespace, and to the WAN via VPN.
+  networking.iproute2.rttablesExtraConfig = ''
+    5 ovpns
+  '';
+  networking.iproute2.enable = true;
+
+
+  # HURRICANE ELECTRIC CONFIG:
+  # networking.sits = {
+  #   hurricane = {
+  #     remote = "216.218.226.238";
+  #     local = "192.168.0.5";
+  #     # local = "10.0.0.5";
+  #     # remote = "10.0.0.1";
+  #     # local = "10.0.0.22";
+  #     dev = "eth0";
+  #     ttl = 255;
+  #   };
+  # };
+  # networking.interfaces."hurricane".ipv6 = {
+  #   addresses = [
+  #     # mx.uninsane.org (publically routed /64)
+  #     {
+  #       address = "2001:470:b:465::1";
+  #       prefixLength = 128;
+  #     }
+  #     # client addr
+  #     # {
+  #     #   address = "2001:470:a:466::2";
+  #     #   prefixLength = 64;
+  #     # }
+  #   ];
+  #   routes = [
+  #     {
+  #       address = "::";
+  #       prefixLength = 0;
+  #       # via = "2001:470:a:466::1";
+  #     }
+  #   ];
+  # };
+
+  # # after configuration, we want the hurricane device to look like this:
+  # # hurricane: flags=209<UP,POINTOPOINT,RUNNING,NOARP>  mtu 1480
+  # #            inet6 2001:470:a:450::2  prefixlen 64  scopeid 0x0<global>
+  # #            inet6 fe80::c0a8:16  prefixlen 64  scopeid 0x20<link>
+  # #            sit  txqueuelen 1000  (IPv6-in-IPv4)
+  # # test with:
+  # #   curl --interface hurricane http://[2607:f8b0:400a:80b::2004]
+  # #   ping 2607:f8b0:400a:80b::2004
+}

hosts/by-name/servo/secrets.nix

@@ -0,0 +1,41 @@
+{ ... }:
+
+{
+  sops.secrets."ddns_afraid" = {
+    sopsFile = ../../../secrets/servo.yaml;
+  };
+  sops.secrets."ddns_he" = {
+    sopsFile = ../../../secrets/servo.yaml;
+  };
+
+  sops.secrets."dovecot_passwd" = {
+    sopsFile = ../../../secrets/servo.yaml;
+  };
+
+  sops.secrets."duplicity_passphrase" = {
+    sopsFile = ../../../secrets/servo.yaml;
+  };
+
+  sops.secrets."freshrss_passwd" = {
+    sopsFile = ../../../secrets/servo.yaml;
+  };
+
+  sops.secrets."matrix_synapse_secrets" = {
+    sopsFile = ../../../secrets/servo.yaml;
+  };
+  sops.secrets."mautrix_signal_env" = {
+    sopsFile = ../../../secrets/servo/mautrix_signal_env.bin;
+  };
+
+  sops.secrets."mediawiki_pw" = {
+    sopsFile = ../../../secrets/servo.yaml;
+  };
+
+  sops.secrets."pleroma_secrets" = {
+    sopsFile = ../../../secrets/servo.yaml;
+  };
+
+  sops.secrets."wg_ovpns_privkey" = {
+    sopsFile = ../../../secrets/servo.yaml;
+  };
+}

hosts/by-name/servo/services/ddns-afraid.nix

@@ -0,0 +1,27 @@
+{ config, lib, pkgs, ... }:
+
+# using manual ddns now
+lib.mkIf false
+{
+  systemd.services.ddns-afraid = {
+    description = "update dynamic DNS entries for freedns.afraid.org";
+    serviceConfig = {
+      EnvironmentFile = config.sops.secrets.ddns_afraid.path;
+      # TODO: ProtectSystem = "strict";
+      # TODO: ProtectHome = "full";
+      # TODO: PrivateTmp = true;
+    };
+    script = let
+      curl = "${pkgs.curl}/bin/curl -4";
+    in ''
+      ${curl} "https://freedns.afraid.org/dynamic/update.php?$AFRAID_KEY"
+    '';
+  };
+  systemd.timers.ddns-afraid = {
+    wantedBy = [ "multi-user.target" ];
+    timerConfig = {
+      OnStartupSec = "2min";
+      OnUnitActiveSec = "10min";
+    };
+  };
+}

hosts/by-name/servo/services/ddns-he.nix

@@ -0,0 +1,30 @@
+{ config, lib, pkgs, ... }:
+
+# we use manual DDNS now
+lib.mkIf false
+{
+  systemd.services.ddns-he = {
+    description = "update dynamic DNS entries for HurricaneElectric";
+    serviceConfig = {
+      EnvironmentFile = config.sops.secrets.ddns_he.path;
+      # TODO: ProtectSystem = "strict";
+      # TODO: ProtectHome = "full";
+      # TODO: PrivateTmp = true;
+    };
+    # HE DDNS API is documented: https://dns.he.net/docs.html
+    script = let
+      crl = "${pkgs.curl}/bin/curl -4";
+    in ''
+      ${crl} "https://he.uninsane.org:$HE_PASSPHRASE@dyn.dns.he.net/nic/update?hostname=he.uninsane.org"
+      ${crl} "https://native.uninsane.org:$HE_PASSPHRASE@dyn.dns.he.net/nic/update?hostname=native.uninsane.org"
+      ${crl} "https://uninsane.org:$HE_PASSPHRASE@dyn.dns.he.net/nic/update?hostname=uninsane.org"
+    '';
+  };
+  systemd.timers.ddns-he = {
+    wantedBy = [ "multi-user.target" ];
+    timerConfig = {
+      OnStartupSec = "2min";
+      OnUnitActiveSec = "10min";
+    };
+  };
+}

hosts/by-name/servo/services/default.nix

@@ -0,0 +1,26 @@
+{ ... }:
+{
+  imports = [
+    ./ddns-afraid.nix
+    ./ddns-he.nix
+    ./ejabberd.nix
+    ./freshrss.nix
+    ./gitea.nix
+    ./goaccess.nix
+    ./ipfs.nix
+    ./jackett.nix
+    ./jellyfin.nix
+    ./kiwix-serve.nix
+    ./matrix
+    ./navidrome.nix
+    ./nixserve.nix
+    ./nginx.nix
+    ./pleroma.nix
+    ./postfix.nix
+    ./postgres.nix
+    ./prosody.nix
+    ./transmission.nix
+    ./trust-dns.nix
+    ./wikipedia.nix
+  ];
+}

hosts/by-name/servo/services/ejabberd.nix

@@ -0,0 +1,395 @@
+# docs:
+# - <https://docs.ejabberd.im/admin/configuration/basic>
+# example configs:
+# - <https://github.com/vkleen/machines/blob/138a2586ce185d7cf201d4e1fe898c83c4af52eb/hosts/europium/ejabberd.nix>
+# - <https://github.com/Mic92/stockholm/blob/675ef0088624c9de1cb531f318446316884a9d3d/tv/3modules/ejabberd/default.nix>
+# - <https://github.com/buffet/tararice/blob/master/programs/ejabberd.nix>
+#   - enables STUN and TURN
+#   - only over UDP 3478, not firewall-forwarding any TURN port range
+#   - uses stun_disco module (but with no options)
+# - <https://github.com/leo60228/dotfiles/blob/39b3abba3009bdc31413d4757ca2f882a33eec8b/files/ejabberd.yml>
+# - <https://github.com/Mic92/dotfiles/blob/ddf0f4821f554f7667fc803344657367c55fb9e6/nixos/eve/modules/ejabberd.nix>
+# - <nixpkgs:nixos/tests/xmpp/ejabberd.nix>
+# - 2013: <https://github.com/processone/ejabberd/blob/master/ejabberd.yml.example>
+#
+# compliance tests:
+# - <https://compliance.conversations.im/server/uninsane.org/#xep0352>
+{ config, lib, pkgs, ... }:
+
+# XXX: avatar support works in MUCs but not DMs
+# lib.mkIf false
+{
+  sane.persist.sys.plaintext = [
+    { user = "ejabberd"; group = "ejabberd"; directory = "/var/lib/ejabberd"; }
+  ];
+  networking.firewall.allowedTCPPorts = [
+    3478  # STUN/TURN
+    5222  # XMPP  client -> server
+    5223  # XMPPS client -> server (XMPP over TLS)
+    5269  # XMPP  server -> server
+    5270  # XMPPS server -> server (XMPP over TLS)
+    5280  # bosh
+    5281  # bosh (https) ??
+    5349  # STUN/TURN (TLS)
+    5443  # web services (file uploads, websockets, admin)
+  ];
+  networking.firewall.allowedUDPPorts = [
+    3478  # STUN/TURN
+  ];
+  networking.firewall.allowedTCPPortRanges = [{
+    from = 49152;  # TURN
+    to = 65535;
+  }];
+  networking.firewall.allowedUDPPortRanges = [{
+    from = 49152;  # TURN
+    to = 65535;
+  }];
+
+  # provide access to certs
+  # TODO: this should just be `acme`. then we also add nginx to the `acme` group.
+  #   why is /var/lib/acme/* owned by `nginx` group??
+  users.users.ejabberd.extraGroups = [ "nginx" ];
+
+  security.acme.certs."uninsane.org".extraDomainNames = [
+    "xmpp.uninsane.org"
+    "muc.xmpp.uninsane.org"
+    "pubsub.xmpp.uninsane.org"
+    "upload.xmpp.uninsane.org"
+    "vjid.xmpp.uninsane.org"
+  ];
+
+  # exists so the XMPP server's cert can obtain altNames for all its resources
+  services.nginx.virtualHosts."xmpp.uninsane.org" = {
+    useACMEHost = "uninsane.org";
+  };
+  services.nginx.virtualHosts."muc.xmpp.uninsane.org" = {
+    useACMEHost = "uninsane.org";
+  };
+  services.nginx.virtualHosts."pubsub.xmpp.uninsane.org" = {
+    useACMEHost = "uninsane.org";
+  };
+  services.nginx.virtualHosts."upload.xmpp.uninsane.org" = {
+    useACMEHost = "uninsane.org";
+  };
+  services.nginx.virtualHosts."vjid.xmpp.uninsane.org" = {
+    useACMEHost = "uninsane.org";
+  };
+
+  sane.services.trust-dns.zones."uninsane.org".inet = {
+    # XXX: SRV records have to point to something with a A/AAAA record; no CNAMEs
+    A."xmpp" =                "%NATIVE%";
+    CNAME."muc.xmpp" =        "xmpp";
+    CNAME."pubsub.xmpp" =     "xmpp";
+    CNAME."upload.xmpp" =     "xmpp";
+    CNAME."vjid.xmpp" =       "xmpp";
+
+    # _Service._Proto.Name    TTL Class SRV    Priority Weight Port Target
+    # - <https://xmpp.org/extensions/xep-0368.html>
+    # something's requesting the SRV records for muc.xmpp, so let's include it
+    # nothing seems to request XMPP SRVs for the other records (except @)
+    # lower numerical priority field tells clients to prefer this method
+    SRV."_xmpps-client._tcp.muc.xmpp" =       "3 50 5223 xmpp";
+    SRV."_xmpps-server._tcp.muc.xmpp" =       "3 50 5270 xmpp";
+    SRV."_xmpp-client._tcp.muc.xmpp" =        "5 50 5222 xmpp";
+    SRV."_xmpp-server._tcp.muc.xmpp" =        "5 50 5269 xmpp";
+
+    SRV."_xmpps-client._tcp" =                "3 50 5223 xmpp";
+    SRV."_xmpps-server._tcp" =                "3 50 5270 xmpp";
+    SRV."_xmpp-client._tcp" =                 "5 50 5222 xmpp";
+    SRV."_xmpp-server._tcp" =                 "5 50 5269 xmpp";
+
+    SRV."_stun._udp" =                        "5 50 3478 xmpp";
+    SRV."_stun._tcp" =                        "5 50 3478 xmpp";
+    SRV."_stuns._tcp" =                       "5 50 5349 xmpp";
+    SRV."_turn._udp" =                        "5 50 3478 xmpp";
+    SRV."_turn._tcp" =                        "5 50 3478 xmpp";
+    SRV."_turns._tcp" =                       "5 50 5349 xmpp";
+  };
+
+  # TODO: allocate UIDs/GIDs ?
+  services.ejabberd.enable = true;
+  services.ejabberd.configFile = "/var/lib/ejabberd/ejabberd.yaml";
+  systemd.services.ejabberd.preStart = let
+    config-in = pkgs.writeTextFile {
+      name = "ejabberd.yaml.in";
+      text = ''
+        hosts:
+          - uninsane.org
+
+        # none | emergency | alert | critical | error | warning | notice | info | debug
+        loglevel: debug
+        # loglevel: info
+        # loglevel: notice
+
+        acme:
+          auto: false
+        certfiles:
+        - /var/lib/acme/uninsane.org/full.pem
+        # ca_file: ${pkgs.cacert.unbundled}/etc/ssl/certs/
+        # ca_file: ${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt
+
+        pam_userinfotype: jid
+
+        acl:
+          admin:
+            user:
+              - "colin@uninsane.org"
+          local:
+            user_regexp: ""
+          loopback:
+            ip:
+              - 127.0.0.0/8
+              - ::1/128
+
+        access_rules:
+          local:
+            allow: local
+          c2s_access:
+            allow: all
+          announce:
+            allow: admin
+          configure:
+            allow: admin
+          muc_create:
+            allow: local
+          pubsub_createnode_access:
+            allow: all
+          trusted_network:
+            allow: loopback
+
+        # docs: <https://docs.ejabberd.im/admin/configuration/basic/#shaper-rules>
+        shaper_rules:
+          # setting this to above 1 may break outgoing messages
+          # - maybe some servers rate limit? or just don't understand simultaneous connections?
+          max_s2s_connections: 1
+          max_user_sessions: 10
+          max_user_offline_messages: 5000
+          c2s_shaper:
+            fast: all
+          s2s_shaper:
+            med: all
+
+        # docs: <https://docs.ejabberd.im/admin/configuration/basic/#shapers>
+        # this limits the bytes/sec.
+        # for example, burst: 3_000_000 and rate: 100_000 means:
+        # - each client has a BW budget that accumulates 100kB/sec and is capped at 3 MB
+        shaper:
+          fast: 1000000
+          med:   500000
+        #   fast:
+        #     - rate:        1000000
+        #     - burst_size: 10000000
+        #   med:
+        #     - rate:         500000
+        #     - burst_size:  5000000
+
+        # see: <https://docs.ejabberd.im/admin/configuration/listen/>
+        # s2s_use_starttls: true
+        s2s_use_starttls: optional
+        # lessens 504: remote-server-timeout errors
+        # see: <https://github.com/processone/ejabberd/issues/3105#issuecomment-562182967>
+        negotiation_timeout: 60
+
+        listen:
+          -
+            port: 5222
+            module: ejabberd_c2s
+            shaper: c2s_shaper
+            starttls: true
+            access: c2s_access
+          -
+            port: 5223
+            module: ejabberd_c2s
+            shaper: c2s_shaper
+            tls: true
+            access: c2s_access
+          -
+            port: 5269
+            module: ejabberd_s2s_in
+            shaper: s2s_shaper
+          -
+            port: 5270
+            module: ejabberd_s2s_in
+            shaper: s2s_shaper
+            tls: true
+          -
+            port: 5443
+            module: ejabberd_http
+            tls: true
+            request_handlers:
+              /admin: ejabberd_web_admin  # TODO: ensure this actually works
+              /api: mod_http_api  # ejabberd API endpoint (to control server)
+              /bosh: mod_bosh
+              /upload: mod_http_upload
+              /ws: ejabberd_http_ws
+              # /.well-known/host-meta: mod_host_meta
+              # /.well-known/host-meta.json: mod_host_meta
+          -
+            # STUN+TURN TCP
+            # note that the full port range should be forwarded ("not NAT'd")
+            # `use_turn=true` enables both TURN *and* STUN
+            port: 3478
+            module: ejabberd_stun
+            transport: tcp
+            use_turn: true
+            turn_min_port: 49152
+            turn_max_port: 65535
+            turn_ipv4_address: %NATIVE%
+          -
+            # STUN+TURN UDP
+            port: 3478
+            module: ejabberd_stun
+            transport: udp
+            use_turn: true
+            turn_min_port: 49152
+            turn_max_port: 65535
+            turn_ipv4_address: %NATIVE%
+          -
+            # STUN+TURN TLS over TCP
+            port: 5349
+            module: ejabberd_stun
+            transport: tcp
+            tls: true
+            certfile: /var/lib/acme/uninsane.org/full.pem
+            use_turn: true
+            turn_min_port: 49152
+            turn_max_port: 65535
+            turn_ipv4_address: %NATIVE%
+
+        # TODO: enable mod_fail2ban
+        # TODO(low): look into mod_http_fileserver for serving macros?
+        modules:
+          # mod_adhoc: {}
+          # mod_announce:
+          #   access: admin
+          # allows users to set avatars in vCard
+          # - <https://docs.ejabberd.im/admin/configuration/modules/#mod-avatar>
+          mod_avatar: {}
+          mod_caps: {}  # for mod_pubsub
+          mod_carboncopy: {}  # allows multiple clients to receive a user's message
+          # queues messages when recipient is offline, including PEP and presence messages.
+          # compliance test suggests this be enabled
+          mod_client_state: {}
+          # mod_conversejs: TODO: enable once on 21.12
+          # allows clients like Dino to discover where to upload files
+          mod_disco:
+            server_info:
+              -
+                modules: all
+                name: abuse-addresses
+                urls:
+                  - "mailto:admin.xmpp@uninsane.org"
+                  - "xmpp:colin@uninsane.org"
+              -
+                modules: all
+                name: admin-addresses
+                urls:
+                  - "mailto:admin.xmpp@uninsane.org"
+                  - "xmpp:colin@uninsane.org"
+          mod_http_upload:
+            host: upload.xmpp.uninsane.org
+            hosts:
+              - upload.xmpp.uninsane.org
+            put_url: "https://@HOST@:5443/upload"
+            dir_mode: "0750"
+            file_mode: "0750"
+            rm_on_unregister: false
+          # allow discoverability of BOSH and websocket endpoints
+          # TODO: enable once on ejabberd 22.05  (presently 21.04)
+          # mod_host_meta: {}
+          mod_jidprep: {}  # probably not needed: lets clients normalize jids
+          mod_last: {}  # allow other users to know when i was last online
+          mod_mam:
+            # Mnesia is limited to 2GB, better to use an SQL backend
+            # For small servers SQLite is a good fit and is very easy
+            # to configure. Uncomment this when you have SQL configured:
+            # db_type: sql
+            assume_mam_usage: true
+            default: always
+          mod_muc:
+            access:
+              - allow
+            access_admin:
+              - allow: admin
+            access_create: muc_create
+            access_persistent: muc_create
+            access_mam:
+              - allow
+            history_size: 100  # messages to show new participants
+            host: muc.xmpp.uninsane.org
+            hosts:
+              - muc.xmpp.uninsane.org
+            default_room_options:
+              anonymous: false
+              lang: en
+              persistent: true
+              mam: true
+          mod_muc_admin: {}
+          mod_offline:  # store messages for a user when they're offline (TODO: understand multi-client workflow?)
+            access_max_user_messages: max_user_offline_messages
+            store_groupchat: true
+          mod_ping: {}
+          mod_privacy: {}  # deprecated, but required for `ejabberctl export_piefxis`
+          mod_private: {}  # allow local clients to persist arbitrary data on my server
+          # push notifications to services integrated with e.g. Apple/Android.
+          # default is for a maximum amount of PII to be withheld, since these push notifs
+          # generally traverse 3rd party services. can opt to include message body, etc, though.
+          mod_push: {}
+          # i don't fully understand what this does, but it seems aimed at making push notifs more reliable.
+          mod_push_keepalive: {}
+          mod_roster:
+            versioning: true
+          # docs: <https://docs.ejabberd.im/admin/configuration/modules/#mod-s2s-dialback>
+          # s2s dialback to verify inbound messages
+          # unclear to what degree the XMPP network requires this
+          mod_s2s_dialback: {}
+          mod_shared_roster: {}  # creates groups for @all, @online, and anything manually administered?
+          mod_stream_mgmt:
+            resend_on_timeout: if_offline  # resend undelivered messages if the origin client is offline
+          # fallback for when DNS-based STUN discovery is unsupported.
+          # - see: <https://xmpp.org/extensions/xep-0215.html>
+          # docs: <https://docs.ejabberd.im/admin/configuration/modules/#mod-stun-disco>
+          # people say to just keep this defaulted (i guess ejabberd knows to return its `host` option of uninsane.org?)
+          mod_stun_disco: {}
+          # docs: <https://docs.ejabberd.im/admin/configuration/modules/#mod-vcard>
+          mod_vcard:
+            allow_return_all: true  # all users are discoverable (?)
+            host: vjid.xmpp.uninsane.org
+            hosts:
+              - vjid.xmpp.uninsane.org
+            search: true
+          mod_vcard_xupdate: {}  # needed for avatars
+          # docs: <https://docs.ejabberd.im/admin/configuration/modules/#mod-pubsub>
+          mod_pubsub:  # needed for avatars
+            access_createnode: pubsub_createnode_access
+            host: pubsub.xmpp.uninsane.org
+            hosts:
+              - pubsub.xmpp.uninsane.org
+            ignore_pep_from_offline: false
+            last_item_cache: true
+            plugins:
+              - pep
+              - flat
+            force_node_config:
+              # ensure client bookmarks are private
+              storage:bookmarks:
+                access_model: whitelist
+              urn:xmpp:avatar:data:
+                access_model: open
+              urn:xmpp:avatar:metadata:
+                access_model: open
+          mod_version: {}
+      '';
+    };
+    sed = "${pkgs.gnused}/bin/sed";
+  in ''
+    ip=$(cat '${config.sane.services.dyn-dns.ipPath}')
+    # config is 444 (not 644), so we want to write out-of-place and then atomically move
+    # TODO: factor this out into `sane-woop` helper?
+    rm -f /var/lib/ejabberd/ejabberd.yaml.new
+    ${sed} "s/%NATIVE%/$ip/" ${config-in} > /var/lib/ejabberd/ejabberd.yaml.new
+    mv /var/lib/ejabberd/ejabberd.yaml{.new,}
+  '';
+
+  sane.services.dyn-dns.restartOnChange = [ "ejabberd.service" ];
+}

hosts/by-name/servo/services/freshrss.nix

@@ -0,0 +1,63 @@
+# import feeds with e.g.
+# ```console
+# $ nix build '.#nixpkgs.freshrss'
+# $ sudo -u freshrss -g freshrss FRESHRSS_DATA_PATH=/var/lib/freshrss ./result/cli/import-for-user.php --user admin --filename /home/colin/.config/newsflashFeeds.opml
+# ```
+#
+# export feeds with
+# ```console
+# $ sudo -u freshrss -g freshrss FRESHRSS_DATA_PATH=/var/lib/freshrss ./result/cli/export-opml-for-user.php --user admin
+# ```
+
+{ config, lib, pkgs, sane-lib, ... }:
+{
+  sops.secrets."freshrss_passwd" = {
+    owner = config.users.users.freshrss.name;
+    mode = "0400";
+  };
+  sane.persist.sys.plaintext = [
+    { user = "freshrss"; group = "freshrss"; directory = "/var/lib/freshrss"; }
+  ];
+
+  services.freshrss.enable = true;
+  services.freshrss.baseUrl = "https://rss.uninsane.org";
+  services.freshrss.virtualHost = "rss.uninsane.org";
+  services.freshrss.passwordFile = config.sops.secrets.freshrss_passwd.path;
+
+  systemd.services.freshrss-import-feeds =
+  let
+    feeds = sane-lib.feeds;
+    fresh = config.systemd.services.freshrss-config;
+    all-feeds = config.sane.feeds;
+    wanted-feeds = feeds.filterByFormat ["text" "image"] all-feeds;
+    opml = pkgs.writeText "sane-freshrss.opml" (feeds.feedsToOpml wanted-feeds);
+  in {
+    inherit (fresh) wantedBy environment;
+    serviceConfig = {
+      inherit (fresh.serviceConfig) Type User Group StateDirectory WorkingDirectory
+        # hardening options
+        CapabilityBoundingSet DeviceAllow LockPersonality NoNewPrivileges PrivateDevices PrivateTmp PrivateUsers ProcSubset ProtectClock ProtectControlGroups ProtectHome ProtectHostname ProtectKernelLogs ProtectKernelModules ProtectKernelTunables ProtectProc ProtectSystem RemoveIPC RestrictNamespaces RestrictRealtime RestrictSUIDSGID SystemCallArchitectures SystemCallFilter UMask;
+    };
+    description = "import sane RSS feed list";
+    after = [ "freshrss-config.service" ];
+    script = ''
+      # easiest way to preserve feeds: delete the user, recreate it, import feeds
+      ${pkgs.freshrss}/cli/delete-user.php --user colin || true
+      ${pkgs.freshrss}/cli/create-user.php --user colin --password "$(cat ${config.services.freshrss.passwordFile})" || true
+      ${pkgs.freshrss}/cli/import-for-user.php --user colin --filename ${opml}
+    '';
+  };
+
+  # the default ("*:0/5") is to run every 5 minutes.
+  # `systemctl list-timers` to show
+  systemd.services.freshrss-updater.startAt = lib.mkForce "*:3/30";
+
+  services.nginx.virtualHosts."rss.uninsane.org" = {
+    addSSL = true;
+    enableACME = true;
+    # inherit kTLS;
+    # the routing is handled by services.freshrss.virtualHost
+  };
+
+  sane.services.trust-dns.zones."uninsane.org".inet.CNAME."rss" = "native";
+}

hosts/by-name/servo/services/gitea.nix

@@ -1,6 +1,10 @@
 { config, pkgs, lib, ... }:
 
 {
+  sane.persist.sys.plaintext = [
+    # TODO: mode? could be more granular
+    { user = "git"; group = "gitea"; directory = "/var/lib/gitea"; }
+  ];
   services.gitea.enable = true;
   services.gitea.user = "git";  # default is 'gitea'
   services.gitea.database.type = "postgres";
@@ -8,9 +12,20 @@
   services.gitea.appName = "Perfectly Sane Git";
   services.gitea.domain = "git.uninsane.org";
   services.gitea.rootUrl = "https://git.uninsane.org/";
-  services.gitea.cookieSecure = true;
+  services.gitea.settings.session.COOKIE_SECURE = true;
   # services.gitea.disableRegistration = true;
 
+  # gitea doesn't create the git user
+  users.users.git = {
+    description = "Gitea Service";
+    home = "/var/lib/gitea";
+    useDefaultShell = true;
+    group = "gitea";
+    isSystemUser = true;
+    # sendmail access (not 100% sure if this is necessary)
+    extraGroups = [ "postdrop" ];
+  };
+
   services.gitea.settings = {
     server = {
       # options: "home", "explore", "organizations", "login" or URL fragment (or full URL)
@@ -55,7 +70,7 @@
     };
   };
   # options: "Trace", "Debug", "Info", "Warn", "Error", "Critical"
-  services.gitea.log.level = "Info";
+  services.gitea.settings.log.LEVEL = "Warn";
 
   systemd.services.gitea.serviceConfig = {
     # nix default is AF_UNIX AF_INET AF_INET6.
@@ -67,4 +82,18 @@
       "/var/lib/gitea"
     ];
   };
+
+  # hosted git (web view and for `git <cmd>` use
+  # TODO: enable publog?
+  services.nginx.virtualHosts."git.uninsane.org" = {
+    forceSSL = true;  # gitea complains if served over a different protocol than its config file says
+    enableACME = true;
+    # inherit kTLS;
+
+    locations."/" = {
+      proxyPass = "http://127.0.0.1:3000";
+    };
+  };
+
+  sane.services.trust-dns.zones."uninsane.org".inet.CNAME."git" = "native";
 }

hosts/by-name/servo/services/goaccess.nix

@@ -0,0 +1,68 @@
+{ pkgs, ... }:
+{
+  # based on <https://bytes.fyi/real-time-goaccess-reports-with-nginx/>
+  # log-format setting can be derived with this tool if custom:
+  # - <https://github.com/stockrt/nginx2goaccess>
+  # config options:
+  # - <https://github.com/allinurl/goaccess/blob/master/config/goaccess.conf>
+
+  systemd.services.goaccess = {
+    description = "GoAccess server monitoring";
+    serviceConfig = {
+      ExecStart = ''
+        ${pkgs.goaccess}/bin/goaccess \
+          -f /var/log/nginx/public.log \
+          --log-format=VCOMBINED \
+          --real-time-html \
+          --html-refresh=30 \
+          --no-query-string \
+          --anonymize-ip \
+          --ignore-panel=HOSTS \
+          --ws-url=wss://sink.uninsane.org:443/ws \
+          --port=7890 \
+          -o /var/lib/uninsane/sink/index.html
+      '';
+      ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
+      Type = "simple";
+      Restart = "on-failure";
+      RestartSec = "10s";
+
+      # hardening
+      WorkingDirectory = "/tmp";
+      NoNewPrivileges = true;
+      PrivateTmp = true;
+      ProtectHome = "read-only";
+      ProtectSystem = "strict";
+      SystemCallFilter = "~@clock @cpu-emulation @debug @keyring @memlock @module @mount @obsolete @privileged @reboot @resources @setuid @swap @raw-io";
+      ReadOnlyPaths = "/";
+      ReadWritePaths = [ "/proc/self" "/var/lib/uninsane/sink" ];
+      PrivateDevices = "yes";
+      ProtectKernelModules = "yes";
+      ProtectKernelTunables = "yes";
+    };
+    after = [ "network.target" ];
+    wantedBy = [ "multi-user.target" ];
+  };
+
+  # server statistics
+  services.nginx.virtualHosts."sink.uninsane.org" = {
+    addSSL = true;
+    enableACME = true;
+    # inherit kTLS;
+    root = "/var/lib/uninsane/sink";
+
+    locations."/ws" = {
+      proxyPass = "http://127.0.0.1:7890";
+      # XXX not sure how much of this is necessary
+      extraConfig = ''
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection $connection_upgrade;
+        proxy_buffering off;
+        proxy_read_timeout 7d;
+      '';
+    };
+  };
+
+  sane.services.trust-dns.zones."uninsane.org".inet.CNAME."sink" = "native";
+}

hosts/by-name/servo/services/ipfs.nix

@@ -0,0 +1,93 @@
+# admin:
+# - view stats:
+#   - sudo -u ipfs -g ipfs ipfs -c /var/lib/ipfs/ stats bw
+#   - sudo -u ipfs -g ipfs ipfs -c /var/lib/ipfs/ stats dht
+#   - sudo -u ipfs -g ipfs ipfs -c /var/lib/ipfs/ bitswap stat
+# - number of open peer connections:
+#   - sudo -u ipfs -g ipfs ipfs -c /var/lib/ipfs/ swarm peers | wc -l
+
+{ lib, ... }:
+
+lib.mkIf false # i don't actively use ipfs anymore
+{
+  sane.persist.sys.plaintext = [
+    # TODO: mode? could be more granular
+    { user = "261"; group = "261"; directory = "/var/lib/ipfs"; }
+  ];
+
+  networking.firewall.allowedTCPPorts = [ 4001 ];
+  networking.firewall.allowedUDPPorts = [ 4001 ];
+
+  services.nginx.virtualHosts."ipfs.uninsane.org" = {
+    # don't default to ssl upgrades, since this may be dnslink'd from a different domain.
+    # ideally we'd disable ssl entirely, but some places assume it?
+    addSSL = true;
+    enableACME = true;
+    # inherit kTLS;
+
+    locations."/" = {
+      proxyPass = "http://127.0.0.1:8080";
+      extraConfig = ''
+        proxy_set_header Host $host;
+        proxy_set_header X-Ipfs-Gateway-Prefix "";
+      '';
+    };
+  };
+
+  sane.services.trust-dns.zones."uninsane.org".inet.CNAME."ipfs" = "native";
+
+  # services.ipfs.enable = true;
+  services.kubo.localDiscovery = true;
+  services.kubo.settings = {
+    Addresses = {
+      Announce = [
+        # "/dns4/ipfs.uninsane.org/tcp/4001"
+        "/dns4/ipfs.uninsane.org/udp/4001/quic"
+      ];
+      Swarm = [
+        # "/dns4/ipfs.uninsane.org/tcp/4001"
+        # "/ip4/0.0.0.0/tcp/4001"
+        "/dns4/ipfs.uninsane.org/udp/4001/quic"
+        "/ip4/0.0.0.0/udp/4001/quic"
+      ];
+    };
+    Gateway = {
+      # the gateway can only be used to serve content already replicated on this host
+      NoFetch = true;
+    };
+    Swarm = {
+      ConnMgr = {
+        # maintain between LowWater and HighWater peer connections
+        # taken from: https://github.com/ipfs/ipfs-desktop/pull/2055
+        # defaults are 600-900: https://github.com/ipfs/kubo/blob/master/docs/config.md#swarmconnmgr
+        LowWater = 20;
+        HighWater = 40;
+        # default is 20s. i guess more grace period = less churn
+        GracePeriod = "1m";
+      };
+      ResourceMgr = {
+        # docs: https://github.com/libp2p/go-libp2p-resource-manager#resource-scopes
+        Enabled = true;
+        Limits = {
+          System = {
+            Conns = 196;
+            ConnsInbound = 128;
+            ConnsOutbound = 128;
+            FD = 512;
+            Memory = 1073741824;  # 1GiB
+            Streams = 1536;
+            StreamsInbound = 1024;
+            StreamsOutbound = 1024;
+          };
+        };
+      };
+      Transports = {
+        Network = {
+          # disable TCP, force QUIC, for lighter resources
+          TCP = false;
+          QUIC = true;
+        };
+      };
+    };
+  };
+}

hosts/by-name/servo/services/jackett.nix

@@ -0,0 +1,32 @@
+{ ... }:
+
+{
+  sane.persist.sys.plaintext = [
+    # TODO: mode? we only need this to save Indexer creds ==> migrate to config?
+    { user = "root"; group = "root"; directory = "/var/lib/jackett"; }
+  ];
+  services.jackett.enable = true;
+
+  systemd.services.jackett.after = [ "wireguard-wg-ovpns.service" ];
+  systemd.services.jackett.partOf = [ "wireguard-wg-ovpns.service" ];
+  systemd.services.jackett.serviceConfig = {
+    # run this behind the OVPN static VPN
+    NetworkNamespacePath = "/run/netns/ovpns";
+    # patch jackett to listen on the public interfaces
+    # ExecStart = lib.mkForce "${pkgs.jackett}/bin/Jackett --NoUpdates --DataFolder /var/lib/jackett/.config/Jackett --ListenPublic";
+  };
+
+  # jackett torrent search
+  services.nginx.virtualHosts."jackett.uninsane.org" = {
+    forceSSL = true;
+    enableACME = true;
+    # inherit kTLS;
+    locations."/" = {
+      # proxyPass = "http://ovpns.uninsane.org:9117";
+      proxyPass = "http://10.0.1.6:9117";
+    };
+  };
+
+  sane.services.trust-dns.zones."uninsane.org".inet.CNAME."jackett" = "native";
+}
+

hosts/by-name/servo/services/jellyfin.nix

@@ -0,0 +1,67 @@
+{ config, lib, ... }:
+
+# TODO: re-enable after migrating media dir to /var/lib/uninsane/media
+# else it's too spammy
+lib.mkIf false
+{
+  networking.firewall.allowedUDPPorts = [
+    1900 7359 # DLNA: https://jellyfin.org/docs/general/networking/index.html
+  ];
+  sane.persist.sys.plaintext = [
+    # TODO: mode? could be more granular
+    { user = "jellyfin"; group = "jellyfin"; directory = "/var/lib/jellyfin"; }
+  ];
+
+  # Jellyfin multimedia server
+  # this is mostly taken from the official jellfin.org docs
+  services.nginx.virtualHosts."jelly.uninsane.org" = {
+    addSSL = true;
+    enableACME = true;
+    # inherit kTLS;
+
+    locations."/" = {
+      proxyPass = "http://127.0.0.1:8096";
+      extraConfig = ''
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_set_header X-Forwarded-Protocol $scheme;
+        proxy_set_header X-Forwarded-Host $http_host;
+
+        # Disable buffering when the nginx proxy gets very resource heavy upon streaming
+        proxy_buffering off;
+      '';
+    };
+    # locations."/web/" = {
+    #   proxyPass = "http://127.0.0.1:8096/web/index.html";
+    #   extraConfig = ''
+    #     proxy_set_header Host $host;
+    #     proxy_set_header X-Real-IP $remote_addr;
+    #     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    #     proxy_set_header X-Forwarded-Proto $scheme;
+    #     proxy_set_header X-Forwarded-Protocol $scheme;
+    #     proxy_set_header X-Forwarded-Host $http_host;
+    #   '';
+    # };
+    locations."/socket" = {
+      proxyPass = "http://127.0.0.1:8096";
+      extraConfig = ''
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_set_header X-Forwarded-Protocol $scheme;
+        proxy_set_header X-Forwarded-Host $http_host;
+      '';
+    };
+  };
+
+  sane.services.trust-dns.zones."uninsane.org".inet.CNAME."jelly" = "native";
+
+  services.jellyfin.enable = true;
+}

hosts/by-name/servo/services/kiwix-serve.nix

@@ -0,0 +1,17 @@
+{ ... }:
+{
+  sane.services.kiwix-serve = {
+    enable = true;
+    port = 8013;
+    zimPaths = [ "/var/lib/uninsane/www-archive/wikipedia_en_all_maxi_2022-05.zim" ];
+  };
+
+  services.nginx.virtualHosts."w.uninsane.org" = {
+    forceSSL = true;
+    enableACME = true;
+    # inherit kTLS;
+    locations."/".proxyPass = "http://127.0.0.1:8013";
+  };
+
+  sane.services.trust-dns.zones."uninsane.org".inet.CNAME."w" = "native";
+}

hosts/by-name/servo/services/matrix/default.nix

@@ -0,0 +1,139 @@
+# docs: https://nixos.wiki/wiki/Matrix
+# docs: https://nixos.org/manual/nixos/stable/index.html#module-services-matrix-synapse
+{ config, lib, pkgs, ... }:
+
+{
+  imports = [
+    ./discord-puppet.nix
+    # ./irc.nix
+    ./signal.nix
+  ];
+
+  # allow synapse to read the registration files of its appservices
+  users.users.matrix-synapse.extraGroups = [ "mautrix-signal" ];
+
+  sane.persist.sys.plaintext = [
+    { user = "matrix-synapse"; group = "matrix-synapse"; directory = "/var/lib/matrix-synapse"; }
+  ];
+  services.matrix-synapse.enable = true;
+  # this changes the default log level from INFO to WARN.
+  # maybe there's an easier way?
+  services.matrix-synapse.settings.log_config = ./synapse-log_level.yaml;
+  services.matrix-synapse.settings.server_name = "uninsane.org";
+
+  # services.matrix-synapse.enable_registration_captcha = true;
+  # services.matrix-synapse.enable_registration_without_verification = true;
+  services.matrix-synapse.settings.enable_registration = true;
+  # services.matrix-synapse.registration_shared_secret = "<shared key goes here>";
+
+  # default for listeners is port = 8448, tls = true, x_forwarded = false.
+  # we change this because the server is situated behind nginx.
+  services.matrix-synapse.settings.listeners = [
+    {
+      port = 8008;
+      bind_addresses = [ "127.0.0.1" ];
+      type = "http";
+      tls = false;
+      x_forwarded = true;
+      resources = [
+        {
+          names = [ "client" "federation" ];
+          compress = false;
+        }
+      ];
+    }
+  ];
+
+  services.matrix-synapse.settings.admin_contact = "admin.matrix@uninsane.org";
+  services.matrix-synapse.settings.registrations_require_3pid = [ "email" ];
+
+  services.matrix-synapse.extraConfigFiles = [
+    config.sops.secrets.matrix_synapse_secrets.path
+  ];
+
+  # services.matrix-synapse.extraConfigFiles = [builtins.toFile "matrix-synapse-extra-config" ''
+  #   admin_contact: "admin.matrix@uninsane.org"
+  #   registrations_require_3pid:
+  #     - email
+  #   email:
+  #     smtp_host: "mx.uninsane.org"
+  #     smtp_port: 587
+  #     smtp_user: "matrix-synapse"
+  #     smtp_pass: "${secrets.matrix-synapse.smtp_pass}"
+  #     require_transport_security: true
+  #     enable_tls: true
+  #     notif_from: "%(app)s <notify.matrix@uninsane.org>"
+  #     app_name: "Uninsane Matrix"
+  #     enable_notifs: true
+  #     validation_token_lifetime: 96h
+  #     invite_client_location: "https://web.matrix.uninsane.org"
+  #     subjects:
+  #       email_validation: "[%(server_name)s] Validate your email"
+  # ''];
+
+  # new users may be registered on the CLI:
+  #   register_new_matrix_user -c /nix/store/8n6kcka37jhmi4qpd2r03aj71pkyh21s-homeserver.yaml http://localhost:8008
+  #
+  # or provide an registration token then can use to register through the client.
+  #   docs: https://github.com/matrix-org/synapse/blob/develop/docs/usage/administration/admin_api/registration_tokens.md
+  # first, grab your own user's access token (Help & About section in Element). then:
+  #   curl --header "Authorization: Bearer <my_token>" localhost:8008/_synapse/admin/v1/registration_tokens
+  # create a token with unlimited uses:
+  #   curl -d '{}' --header "Authorization: Bearer <my_token>" localhost:8008/_synapse/admin/v1/registration_tokens/new
+  # create a token with limited uses:
+  #   curl -d '{ "uses_allowed": 1 }' --header "Authorization: Bearer <my_token>" localhost:8008/_synapse/admin/v1/registration_tokens/new
+
+  # matrix chat server
+  # TODO: was `publog`
+  services.nginx.virtualHosts."matrix.uninsane.org" = {
+    addSSL = true;
+    enableACME = true;
+    # inherit kTLS;
+
+    # TODO colin: replace this with something helpful to the viewer
+    # locations."/".extraConfig = ''
+    #   return 404;
+    # '';
+
+    locations."/" = {
+      proxyPass = "http://127.0.0.1:8008";
+    };
+    # redirect browsers to the web client.
+    # i don't think native matrix clients ever fetch the root.
+    # ideally this would be put behind some user-agent test though.
+    locations."= /" = {
+      return = "301 https://web.matrix.uninsane.org";
+    };
+
+    # locations."/_matrix" = {
+    #   proxyPass = "http://127.0.0.1:8008";
+    # };
+  };
+
+  # matrix web client
+  # docs: https://nixos.org/manual/nixos/stable/index.html#module-services-matrix-element-web
+  services.nginx.virtualHosts."web.matrix.uninsane.org" = {
+    forceSSL = true;
+    enableACME = true;
+    # inherit kTLS;
+
+    root = pkgs.element-web.override {
+      conf = {
+        default_server_config."m.homeserver" = {
+          "base_url" = "https://matrix.uninsane.org";
+          "server_name" = "uninsane.org";
+        };
+      };
+    };
+  };
+
+  sane.services.trust-dns.zones."uninsane.org".inet = {
+    CNAME."matrix" = "native";
+    CNAME."web.matrix" = "native";
+  };
+
+
+  sops.secrets."matrix_synapse_secrets" = {
+    owner = config.users.users.matrix-synapse.name;
+  };
+}

hosts/by-name/servo/services/matrix/discord-puppet.nix

@@ -0,0 +1,53 @@
+{ lib, ... }:
+{
+  sane.persist.sys.plaintext = [
+    { user = "matrix-synapse"; group = "matrix-synapse"; directory = "/var/lib/mx-puppet-discord"; }
+  ];
+
+  services.matrix-synapse.settings.app_service_config_files = [
+    # auto-created by mx-puppet-discord service
+    "/var/lib/mx-puppet-discord/discord-registration.yaml"
+  ];
+
+  services.mx-puppet-discord.enable = true;
+  # schema/example: <https://gitlab.com/mx-puppet/discord/mx-puppet-discord/-/blob/main/sample.config.yaml>
+  services.mx-puppet-discord.settings = {
+    bridge = {
+      # port = 8434
+      bindAddress = "127.0.0.1";
+      domain = "uninsane.org";
+      homeserverUrl = "http://127.0.0.1:8008";
+      # displayName = "mx-discord-puppet";  # matrix name for the bot
+      # matrix "groups" were an earlier version of spaces.
+      # maybe the puppet understands this, maybe not?
+      enableGroupSync = false;
+    };
+    presence = {
+      enabled = false;
+      interval = 30000;
+    };
+    provisioning = {
+      # allow these users to control the puppet
+      whitelist = [ "@colin:uninsane\\.org" ];
+    };
+    relay = {
+      whitelist = [ "@colin:uninsane\\.org" ];
+    };
+    selfService = {
+      # who's allowed to use plumbed rooms (idk what that means)
+      whitelist = [ "@colin:uninsane\\.org" ];
+    };
+    logging = {
+      # silly, debug, verbose, info, warn, error
+      console = "debug";
+    };
+  };
+
+  # TODO: should use a dedicated user
+  systemd.services.mx-puppet-discord.serviceConfig = {
+    # fix up to not use /var/lib/private, but just /var/lib
+    DynamicUser = lib.mkForce false;
+    User = "matrix-synapse";
+    Group = "matrix-synapse";
+  };
+}

hosts/by-name/servo/services/matrix/irc.nix

@@ -0,0 +1,97 @@
+{ config, lib, ... }:
+
+{
+  sane.persist.sys.plaintext = [
+    # TODO: mode?
+    # user and group are both "matrix-appservice-irc"
+    { user = "993"; group = "992"; directory = "/var/lib/matrix-appservice-irc"; }
+  ];
+
+  services.matrix-synapse.settings.app_service_config_files = [
+    "/var/lib/matrix-appservice-irc/registration.yml"  # auto-created by irc appservice
+  ];
+
+  # note: Rizon allows only FOUR simultaneous IRC connections per IP: https://wiki.rizon.net/index.php?title=Connection/Session_Limit_Exemptions
+  # Rizon supports CertFP for auth: https://wiki.rizon.net/index.php?title=CertFP
+  services.matrix-appservice-irc.enable = true;
+  services.matrix-appservice-irc.registrationUrl = "http://127.0.0.1:8009";
+  # settings documented here: https://github.com/matrix-org/matrix-appservice-irc/blob/develop/config.sample.yaml
+  services.matrix-appservice-irc.settings = {
+    homeserver = {
+      url = "http://127.0.0.1:8008";
+      dropMatrixMessagesAfterSecs = 300;
+      domain = "uninsane.org";
+      enablePresence = true;
+      bindPort = 9999;
+      bindHost = "127.0.0.1";
+    };
+
+    ircService = {
+      servers = {
+        "irc.rizon.net" = {
+          name = "Rizon";
+          port = 6697;  # SSL port
+          ssl = true;
+          sasl = true;  # appservice doesn't support NickServ identification
+          botConfig = {
+            # bot has no presence in IRC channel; only real Matrix users
+            enabled = false;
+            # nick = "UninsaneDotOrg";
+            nick = "uninsane";
+            username = "uninsane";
+          };
+          dynamicChannels = {
+            enabled = true;
+            aliasTemplate = "#irc_rizon_$CHANNEL";
+          };
+          ircClients = {
+            nickTemplate = "$LOCALPARTsane";
+            # by default, Matrix will convert messages greater than (3) lines into a pastebin-like URL to send to IRC.
+            lineLimit = 20;
+          };
+          matrixClients = {
+            userTemplate = "@irc_rizon_$NICK";  # the :uninsane.org part is appended automatically
+          };
+
+          # this will let this user message the appservice with `!join #<IRCChannel>` and the rest "Just Works"
+          "@colin:uninsane.org" = "admin";
+
+          membershipLists = {
+            enabled = true;
+            global = {
+              ircToMatrix = {
+                initial = true;
+                incremental = true;
+                requireMatrixJoined = false;
+              };
+              matrixToIrc = {
+                initial = true;
+                incremental = true;
+              };
+            };
+          };
+          # sync room description?
+          bridgeInfoState = {
+            enabled = true;
+            initial = true;
+          };
+
+          # hardcoded mappings, for when dynamicChannels fails us. TODO: probably safe to remove these.
+          # mappings = {
+          #   "#chat" = {
+          #     roomIds = [ "!GXJSOTdbtxRboGtDep:uninsane.org" ];
+          #   };
+          #   # BakaBT requires account registration, which i think means my user needs to be added before the appservice user
+          #   "#BakaBT" = {
+          #     roomIds = [ "!feZKttuYuHilqPFSkD:uninsane.org" ];
+          #   };
+          # };
+          # for per-user IRC password:
+          #   invite @irc_rizon_NickServ:uninsane.org to a DM and type `help`  => register
+          #   invite the matrix-appservice-irc user to a DM and type `!help`   => add PW to database
+          # passwordEncryptionKeyPath = "/path/to/privkey";  # appservice will generate its own if unspecified
+        };
+      };
+    };
+  };
+}

hosts/by-name/servo/services/matrix/signal.nix

@@ -0,0 +1,35 @@
+# config options:
+# - <https://github.com/mautrix/signal/blob/master/mautrix_signal/example-config.yaml>
+{ config, pkgs, ... }:
+{
+  sane.persist.sys.plaintext = [
+    { user = "mautrix-signal"; group = "mautrix-signal"; directory = "/var/lib/mautrix-signal"; }
+    { user = "signald"; group = "signald"; directory = "/var/lib/signald"; }
+  ];
+
+  services.signald.enable = true;
+  services.mautrix-signal.enable = true;
+  services.mautrix-signal.environmentFile =
+    config.sops.secrets.mautrix_signal_env.path;
+
+  services.mautrix-signal.settings.signal.socket_path = "/run/signald/signald.sock";
+  services.mautrix-signal.settings.homeserver.domain = "uninsane.org";
+  services.mautrix-signal.settings.bridge.permissions."@colin:uninsane.org" = "admin";
+  services.matrix-synapse.settings.app_service_config_files = [
+    # auto-created by mautrix-signal service
+    "/var/lib/mautrix-signal/signal-registration.yaml"
+  ];
+
+  systemd.services.mautrix-signal.serviceConfig = {
+    # allow communication to signald
+    SupplementaryGroups = [ "signald" ];
+    ReadWritePaths = [ "/run/signald" ];
+  };
+
+  sops.secrets."mautrix_signal_env" = {
+    format = "binary";
+    mode = "0440";
+    owner = config.users.users.mautrix-signal.name;
+    group = config.users.users.matrix-synapse.name;
+  };
+}

hosts/by-name/servo/services/matrix/synapse-log_level.yaml

@@ -0,0 +1,27 @@
+version: 1
+
+# In systemd's journal, loglevel is implicitly stored, so let's omit it
+# from the message text.
+formatters:
+    journal_fmt:
+        format: '%(name)s: [%(request)s] %(message)s'
+
+filters:
+    context:
+        (): synapse.util.logcontext.LoggingContextFilter
+        request: ""
+
+handlers:
+    journal:
+        class: systemd.journal.JournalHandler
+        formatter: journal_fmt
+        filters: [context]
+        SYSLOG_IDENTIFIER: synapse
+
+# default log level: INFO
+root:
+    level: WARN
+    handlers: [journal]
+
+disable_existing_loggers: False
+

hosts/by-name/servo/services/navidrome.nix

@@ -0,0 +1,40 @@
+{ lib, ... }:
+
+{
+  sane.persist.sys.plaintext = [
+    { user = "navidrome"; group = "navidrome"; directory = "/var/lib/navidrome"; }
+  ];
+  services.navidrome.enable = true;
+  services.navidrome.settings = {
+    # docs: https://www.navidrome.org/docs/usage/configuration-options/
+    Address = "127.0.0.1";
+    Port = 4533;
+    MusicFolder = "/var/lib/uninsane/media/Music";
+    CovertArtPriority = "*.jpg, *.JPG, *.png, *.PNG, embedded";
+    AutoImportPlaylists = false;
+    ScanSchedule = "@every 1h";
+  };
+
+  systemd.services.navidrome.serviceConfig = {
+    # fix to use a normal user so we can configure perms correctly
+    DynamicUser = lib.mkForce false;
+    User = "navidrome";
+    Group = "navidrome";
+  };
+
+  users.groups.navidrome = {};
+
+  users.users.navidrome = {
+    group = "navidrome";
+    isSystemUser = true;
+  };
+
+  services.nginx.virtualHosts."music.uninsane.org" = {
+    forceSSL = true;
+    enableACME = true;
+    # inherit kTLS;
+    locations."/".proxyPass = "http://127.0.0.1:4533";
+  };
+
+  sane.services.trust-dns.zones."uninsane.org".inet.CNAME."music" = "native";
+}

hosts/by-name/servo/services/nginx.nix

@@ -0,0 +1,166 @@
+# docs: https://nixos.wiki/wiki/Nginx
+{ config, lib, pkgs, ... }:
+
+let
+  # make the logs for this host "public" so that they show up in e.g. metrics
+  publog = vhost: lib.attrsets.unionOfDisjoint vhost {
+    extraConfig = (vhost.extraConfig or "") + ''
+      access_log /var/log/nginx/public.log vcombined;
+    '';
+  };
+
+  # kTLS = true;  # in-kernel TLS for better perf
+in
+{
+
+  networking.firewall.allowedTCPPorts = [ 80 443 ];
+
+  services.nginx.enable = true;
+  services.nginx.appendConfig = ''
+    # use 1 process per core.
+    # may want to increase worker_connections too, but `ulimit -n` must be increased first.
+    worker_processes auto;
+  '';
+
+  # this is the standard `combined` log format, with the addition of $host
+  # so that we have the virtualHost in the log.
+  # KEEP IN SYNC WITH GOACCESS
+  # goaccess calls this VCOMBINED:
+  # - <https://gist.github.com/jyap808/10570005>
+  services.nginx.commonHttpConfig = ''
+    log_format vcombined '$host:$server_port $remote_addr - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referrer" "$http_user_agent"';
+    access_log /var/log/nginx/private.log vcombined;
+  '';
+  # sets gzip_comp_level = 5
+  services.nginx.recommendedGzipSettings = true;
+  # enables OCSP stapling (so clients don't need contact the OCSP server -- i do instead)
+  # - doesn't seem to, actually: <https://www.ssllabs.com/ssltest/analyze.html?d=uninsane.org>
+  # caches TLS sessions for 10m
+  services.nginx.recommendedTlsSettings = true;
+  # enables sendfile, tcp_nopush, tcp_nodelay, keepalive_timeout 65
+  services.nginx.recommendedOptimisation = true;
+
+  # web blog/personal site
+  services.nginx.virtualHosts."uninsane.org" = publog {
+    root = "${pkgs.uninsane-dot-org}/share/uninsane-dot-org";
+    # a lot of places hardcode https://uninsane.org,
+    # and then when we mix http + non-https, we get CORS violations
+    # and things don't look right. so force SSL.
+    forceSSL = true;
+    enableACME = true;
+    # inherit kTLS;
+    # for OCSP stapling
+    sslTrustedCertificate = "${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt";
+
+    # uninsane.org/share/foo => /var/lib/uninsane/root/share/foo.
+    # yes, nginx does not strip the prefix when evaluating against the root.
+    locations."/share".root = "/var/lib/uninsane/root";
+
+    # allow matrix users to discover that @user:uninsane.org is reachable via matrix.uninsane.org
+    locations."= /.well-known/matrix/server".extraConfig =
+      let
+        # use 443 instead of the default 8448 port to unite
+        # the client-server and server-server port for simplicity
+        server = { "m.server" = "matrix.uninsane.org:443"; };
+      in ''
+        add_header Content-Type application/json;
+        return 200 '${builtins.toJSON server}';
+      '';
+    locations."= /.well-known/matrix/client".extraConfig =
+      let
+        client = {
+          "m.homeserver" =  { "base_url" = "https://matrix.uninsane.org"; };
+          "m.identity_server" =  { "base_url" = "https://vector.im"; };
+        };
+      # ACAO required to allow element-web on any URL to request this json file
+      in ''
+        add_header Content-Type application/json;
+        add_header Access-Control-Allow-Origin *;
+        return 200 '${builtins.toJSON client}';
+      '';
+
+    # static URLs might not be aware of .well-known (e.g. registration confirmation URLs),
+    # so hack around that.
+    locations."/_matrix" = {
+      proxyPass = "http://127.0.0.1:8008";
+    };
+    locations."/_synapse" = {
+      proxyPass = "http://127.0.0.1:8008";
+    };
+
+    # allow ActivityPub clients to discover how to reach @user@uninsane.org
+    # TODO: waiting on https://git.pleroma.social/pleroma/pleroma/-/merge_requests/3361/
+    # locations."/.well-known/nodeinfo" = {
+    #   proxyPass = "http://127.0.0.1:4000";
+    #   extraConfig = pleromaExtraConfig;
+    # };
+  };
+
+
+  # serve any site not listed above, if it's static.
+  # because we define it dynamically, SSL isn't trivial. support only http
+  # documented <https://nginx.org/en/docs/http/ngx_http_core_module.html#server_name>
+  services.nginx.virtualHosts."~^(?<domain>.+)$" = {
+    default = true;
+    addSSL = true;
+    enableACME = false;
+    sslCertificate = "/var/www/certs/wildcard/cert.pem";
+    sslCertificateKey = "/var/www/certs/wildcard/key.pem";
+    # sslCertificate = "/var/lib/acme/.minica/cert.pem";
+    # sslCertificateKey = "/var/lib/acme/.minica/key.pem";
+    # serverName = null;
+    locations."/" = {
+      # somehow this doesn't escape -- i get error 400 if i:
+      # curl 'http://..' --resolve '..:80:127.0.0.1'
+      root = "/var/www/sites/$domain";
+      # tryFiles = "$domain/$uri $domain/$uri/ =404";
+    };
+  };
+
+  security.acme.acceptTerms = true;
+  security.acme.defaults.email = "admin.acme@uninsane.org";
+
+  sane.persist.sys.plaintext = [
+    # TODO: mode?
+    { user = "acme"; group = "acme"; directory = "/var/lib/acme"; }
+    { user = "colin"; group = "users"; directory = "/var/www/sites"; }
+  ];
+
+  # let's encrypt default chain looks like:
+  # - End-entity certificate ← R3 ← ISRG Root X1 ← DST Root CA X3
+  # - <https://community.letsencrypt.org/t/production-chain-changes/150739>
+  # DST Root CA X3 expired in 2021 (?)
+  # the alternative chain is:
+  # - End-entity certificate ← R3 ← ISRG Root X1 (self-signed)
+  # using this alternative chain grants more compatibility for services like ejabberd
+  # but might decrease compatibility with very old clients that don't get updates (e.g. old android, iphone <= 4).
+  # security.acme.defaults.extraLegoFlags = [
+  security.acme.certs."uninsane.org" = rec {
+    # ISRG Root X1 results in lets encrypt sending the same chain as default,
+    # just without the final ISRG Root X1 ← DST Root CA X3 link.
+    # i.e. we could alternative clip the last item and achieve the exact same thing.
+    extraLegoRunFlags = [
+      "--preferred-chain" "ISRG Root X1"
+    ];
+    extraLegoRenewFlags = extraLegoRunFlags;
+  };
+  # TODO: alternatively, we could clip the last cert IF it's expired,
+  # optionally outputting that to a new cert file.
+  # security.acme.defaults.postRun = "";
+
+  # create a self-signed SSL certificate for use with literally any domain.
+  # browsers will reject this, but proxies and local testing tools can be configured
+  # to accept it.
+  system.activationScripts.generate-x509-self-signed.text = ''
+    mkdir -p /var/www/certs/wildcard
+    test -f /var/www/certs/wildcard/key.pem || ${pkgs.openssl}/bin/openssl \
+      req -x509 -newkey rsa:4096 \
+      -keyout /var/www/certs/wildcard/key.pem \
+      -out /var/www/certs/wildcard/cert.pem \
+      -sha256 -nodes -days 3650 \
+      -addext 'subjectAltName=DNS:*' \
+      -subj '/CN=self-signed'
+    chmod 640 /var/www/certs/wildcard/{key,cert}.pem
+    chown root:nginx /var/www/certs/wildcard /var/www/certs/wildcard/{key,cert}.pem
+  '';
+}

hosts/by-name/servo/services/nixserve.nix

@@ -0,0 +1,21 @@
+{ config, ... }:
+
+{
+  services.nginx.virtualHosts."nixcache.uninsane.org" = {
+    addSSL = true;
+    enableACME = true;
+    # inherit kTLS;
+    # serverAliases = [ "nixcache" ];
+    locations."/".extraConfig = ''
+      proxy_pass http://localhost:${toString config.services.nix-serve.port};
+      proxy_set_header Host $host;
+      proxy_set_header X-Real-IP $remote_addr;
+      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    '';
+  };
+
+  sane.services.trust-dns.zones."uninsane.org".inet.CNAME."nixcache" = "native";
+
+  sane.services.nixserve.enable = true;
+  sane.services.nixserve.sopsFile = ../../../../secrets/servo.yaml;
+}

hosts/by-name/servo/services/pleroma.nix

@@ -1,21 +1,26 @@
-# docs: https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/services/networking/pleroma.nix
+# docs:
+# - https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/services/networking/pleroma.nix
+# - https://docs.pleroma.social/backend/configuration/cheatsheet/
 #
 # to run it in a oci-container: https://github.com/barrucadu/nixfiles/blob/master/services/pleroma.nix
-{ config, pkgs, lib, secrets, ... }:
+{ config, pkgs, ... }:
 
 {
+  sane.persist.sys.plaintext = [
+    # TODO: mode? could be more granular
+    { user = "pleroma"; group = "pleroma"; directory = "/var/lib/pleroma"; }
+  ];
   services.pleroma.enable = true;
-  # TODO: we should write a config file somewhere outside the store... somehow.
-  services.pleroma.secretConfigFile = "/dev/null";
+  services.pleroma.secretConfigFile = config.sops.secrets.pleroma_secrets.path;
   services.pleroma.configs = [
     ''
     import Config
 
     config :pleroma, Pleroma.Web.Endpoint,
       url: [host: "fed.uninsane.org", scheme: "https", port: 443],
-      http: [ip: {127, 0, 0, 1}, port: 4000],
-      secret_key_base: "${secrets.pleroma.secret_key_base}",
-      signing_salt: "${secrets.pleroma.signing_salt}"
+      http: [ip: {127, 0, 0, 1}, port: 4000]
+    #   secret_key_base: "{secrets.pleroma.secret_key_base}",
+    #   signing_salt: "{secrets.pleroma.signing_salt}"
 
     config :pleroma, :instance,
       name: "Perfectly Sane",
@@ -43,25 +48,28 @@
       redirect_on_failure: true
       #base_url: "https://cache.pleroma.social"
 
+    # see for reference:
+    # - `force_custom_plan`: <https://docs.pleroma.social/backend/configuration/postgresql/#disable-generic-query-plans>
     config :pleroma, Pleroma.Repo,
       adapter: Ecto.Adapters.Postgres,
       username: "pleroma",
-      password: "${secrets.pleroma.db_password}",
       database: "pleroma",
       hostname: "localhost",
       pool_size: 10,
-      prepare: :named,
       parameters: [
           plan_cache_mode: "force_custom_plan"
       ]
+    # XXX: prepare: :named is needed only for PG <= 12
+    #   prepare: :named,
+    #   password: "{secrets.pleroma.db_password}",
 
     # Configure web push notifications
     config :web_push_encryption, :vapid_details,
-      subject: "mailto:notify.pleroma@uninsane.org",
-      public_key: "${secrets.pleroma.vapid_public_key}",
-      private_key: "${secrets.pleroma.vapid_private_key}"
+      subject: "mailto:notify.pleroma@uninsane.org"
+    #   public_key: "{secrets.pleroma.vapid_public_key}",
+    #   private_key: "{secrets.pleroma.vapid_private_key}"
 
-    config :joken, default_signer: "${secrets.pleroma.joken_default_signer}"
+    # config :joken, default_signer: "{secrets.pleroma.joken_default_signer}"
 
     config :pleroma, :database, rum_enabled: false
     config :pleroma, :instance, static_dir: "/var/lib/pleroma/instance/static"
@@ -69,9 +77,10 @@
     config :pleroma, configurable_from_database: false
 
     # strip metadata from uploaded images
-    config :pleroma, Pleroma.Upload, filters: [Pleroma.Upload.Filter.Exiftool]
+    config :pleroma, Pleroma.Upload, filters: [Pleroma.Upload.Filter.Exiftool.StripLocation]
 
     # TODO: GET /api/pleroma/captcha is broken
+    # there was a nixpkgs PR to fix this around 2022/10 though.
     config :pleroma, Pleroma.Captcha,
       enabled: false,
       method: Pleroma.Captcha.Native
@@ -116,6 +125,7 @@
   systemd.services.pleroma.serviceConfig = {
     # postgres can be slow to service early requests, preventing pleroma from starting on the first try
     Restart = "on-failure";
+    RestartSec = "10s";
   };
 
   # systemd.services.pleroma.serviceConfig = {
@@ -124,4 +134,57 @@
   #   PrivateTmp = lib.mkForce false;
   #   CapabilityBoundingSet = lib.mkForce "~";
   # };
+
+  # this is required to allow pleroma to send email.
+  # raw `sendmail` works, but i think pleroma's passing it some funny flags or something, idk.
+  # hack to fix that.
+  users.users.pleroma.extraGroups = [ "postdrop" ];
+
+  # Pleroma server and web interface
+  # TODO: enable publog?
+  services.nginx.virtualHosts."fed.uninsane.org" = {
+    forceSSL = true;  # pleroma redirects to https anyway
+    enableACME = true;
+    # inherit kTLS;
+    locations."/" = {
+      proxyPass = "http://127.0.0.1:4000";
+      # documented: https://git.pleroma.social/pleroma/pleroma/-/blob/develop/installation/pleroma.nginx
+      extraConfig = ''
+        # XXX colin: this block is in the nixos examples: i don't understand all of it
+        add_header 'Access-Control-Allow-Origin' '*' always;
+        add_header 'Access-Control-Allow-Methods' 'POST, PUT, DELETE, GET, PATCH, OPTIONS' always;
+        add_header 'Access-Control-Allow-Headers' 'Authorization, Content-Type, Idempotency-Key' always;
+        add_header 'Access-Control-Expose-Headers' 'Link, X-RateLimit-Reset, X-RateLimit-Limit, X-RateLimit-Remaining, X-Request-Id' always;
+        if ($request_method = OPTIONS) {
+            return 204;
+        }
+
+        add_header X-XSS-Protection "1; mode=block";
+        add_header X-Permitted-Cross-Domain-Policies none;
+        add_header X-Frame-Options DENY;
+        add_header X-Content-Type-Options nosniff;
+        add_header Referrer-Policy same-origin;
+        add_header X-Download-Options noopen;
+
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+        # proxy_set_header Host $http_host;
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+
+        # colin: added this due to Pleroma complaining in its logs
+        # proxy_set_header X-Real-IP $remote_addr;
+        # proxy_set_header X-Forwarded-Proto $scheme;
+
+        client_max_body_size 16m;
+      '';
+    };
+  };
+
+  sane.services.trust-dns.zones."uninsane.org".inet.CNAME."fed" = "native";
+
+  sops.secrets."pleroma_secrets" = {
+    owner = config.users.users.pleroma.name;
+  };
 }

hosts/by-name/servo/services/postfix.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, lib, secrets, ... }:
+{ config, lib, ... }:
 
 let
   submissionOptions = {
@@ -16,6 +16,70 @@ let
   };
 in
 {
+  sane.persist.sys.plaintext = [
+    # TODO: mode? could be more granular
+    { user = "opendkim"; group = "opendkim"; directory = "/var/lib/opendkim"; }
+    { user = "root"; group = "root"; directory = "/var/lib/postfix"; }
+    { user = "root"; group = "root"; directory = "/var/spool/mail"; }
+    # *probably* don't need these dirs:
+    # "/var/lib/dhparams"          # https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/security/dhparams.nix
+    # "/var/lib/dovecot"
+  ];
+
+  networking.firewall.allowedTCPPorts = [
+    25   # SMTP
+    143  # IMAP
+    465  # SMTPS
+    587  # SMTPS/submission
+    993  # IMAPS
+  ];
+
+  # exists only to manage certs for dovecot
+  services.nginx.virtualHosts."imap.uninsane.org" = {
+    enableACME = true;
+  };
+  # exists only to manage certs for Postfix
+  services.nginx.virtualHosts."mx.uninsane.org" = {
+    enableACME = true;
+  };
+
+
+  sane.services.trust-dns.zones."uninsane.org".inet = {
+    MX."@" = "10 mx.uninsane.org.";
+    # XXX: RFC's specify that the MX record CANNOT BE A CNAME
+    A."mx" = "185.157.162.178";
+    CNAME."imap" = "native";
+
+    # Sender Policy Framework:
+    #   +mx     => mail passes if it originated from the MX
+    #   +a      => mail passes if it originated from the A address of this domain
+    #   +ip4:.. => mail passes if it originated from this IP
+    #   -all    => mail fails if none of these conditions were met
+    TXT."@" = "v=spf1 a mx -all";
+
+    # DKIM public key:
+    TXT."mx._domainkey" =
+      "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCkSyMufc2KrRx3j17e/LyB+3eYSBRuEFT8PUka8EDX04QzCwDPdkwgnj3GNDvnB5Ktb05Cf2SJ/S1OLqNsINxJRWtkVfZd/C339KNh9wrukMKRKNELL9HLUw0bczOI4gKKFqyrRE9qm+4csCMAR79Te9FCjGV/jVnrkLdPT0GtFwIDAQAB"
+    ;
+
+    # DMARC fields <https://datatracker.ietf.org/doc/html/rfc7489>:
+    #   p=none|quarantine|reject: what to do with failures
+    #   sp = p but for subdomains
+    #   rua = where to send aggregrate reports
+    #   ruf = where to send individual failure reports
+    #   fo=0|1|d|s  controls WHEN to send failure reports
+    #     (1=on bad alignment; d=on DKIM failure; s=on SPF failure);
+    # Additionally:
+    #   adkim=r|s  (is DKIM relaxed [default] or strict)
+    #   aspf=r|s   (is SPF relaxed [default] or strict)
+    #   pct = sampling ratio for punishing failures (default 100 for 100%)
+    #   rf = report format
+    #   ri = report interval
+    TXT."_dmarc" =
+      "v=DMARC1;p=quarantine;sp=reject;rua=mailto:admin+mail@uninsane.org;ruf=mailto:admin+mail@uninsane.org;fo=1:d:s"
+    ;
+  };
+
   services.postfix.enable = true;
   services.postfix.hostname = "mx.uninsane.org";
   services.postfix.origin = "uninsane.org";
@@ -46,7 +110,8 @@ in
   services.postfix.enableSubmissions = true;
   services.postfix.submissionsOptions = submissionOptions;
 
-  systemd.services.postfix.after = [ "wg0veth.service" ];
+  systemd.services.postfix.after = [ "wireguard-wg-ovpns.service" ];
+  systemd.services.postfix.partOf = [ "wireguard-wg-ovpns.service" ];
   systemd.services.postfix.serviceConfig = {
     # run this behind the OVPN static VPN
     NetworkNamespacePath = "/run/netns/ovpns";
@@ -67,7 +132,8 @@ in
   # keeping this the same as the hostname seems simplest
   services.opendkim.selector = "mx";
 
-  systemd.services.opendkim.after = [ "wg0veth.service" ];
+  systemd.services.opendkim.after = [ "wireguard-wg-ovpns.service" ];
+  systemd.services.opendkim.partOf = [ "wireguard-wg-ovpns.service" ];
   systemd.services.opendkim.serviceConfig = {
     # run this behind the OVPN static VPN
     NetworkNamespacePath = "/run/netns/ovpns";
@@ -82,10 +148,7 @@ in
   services.dovecot2.enablePAM = false;
   services.dovecot2.extraConfig =
   let
-    passwdFile = builtins.toFile "dovecot-passwd-file" ''
-      colin:${secrets.dovecot.hashedPasswd.colin}:1000:1000::/var/mail/colin/run/current-system/sw/bin/nologin:
-      matrix-synapse:${secrets.dovecot.hashedPasswd.matrix-synapse}:224:224::/var/mail/colin:/run/current-system/sw/bin/nologin:
-      '';
+    passwdFile = config.sops.secrets.dovecot_passwd.path;
   in
     ''
     passdb {
@@ -133,4 +196,10 @@ in
     #   pattern = "/^Subject:.*activate your account/";
     # }
   ];
+
+  sops.secrets."dovecot_passwd" = {
+    owner = config.users.users.dovecot2.name;
+    # TODO: debug why mail can't be sent without this being world-readable
+    mode = "0444";
+  };
 }

hosts/by-name/servo/services/postgres.nix

@@ -1,8 +1,12 @@
-{ config, pkgs, lib, ... }:
+{ ... }:
 
 {
+  sane.persist.sys.plaintext = [
+    # TODO: mode?
+    { user = "postgres"; group = "postgres"; directory = "/var/lib/postgresql"; }
+  ];
   services.postgresql.enable = true;
-  services.postgresql.dataDir = "/opt/postgresql/13";
+  # services.postgresql.dataDir = "/opt/postgresql/13";
   # XXX colin: for a proper deploy, we'd want to include something for Pleroma here too.
   # services.postgresql.initialScript = pkgs.writeText "synapse-init.sql" ''
   #   CREATE ROLE "matrix-synapse" WITH LOGIN PASSWORD '<password goes here>';
@@ -13,6 +17,11 @@
   #     LC_CTYPE = "C";
   # '';
 
+  # TODO: perf tuning
+  # - for recommended values see: <https://pgtune.leopard.in.ua/>
+  # - for official docs (sparse), see: <https://www.postgresql.org/docs/11/config-setting.html#CONFIG-SETTING-CONFIGURATION-FILE>
+  # services.postgresql.settings = { ... }
+
   # daily backups to /var/backup
   services.postgresqlBackup.enable = true;
 

hosts/by-name/servo/services/prosody.nix

@@ -0,0 +1,64 @@
+# example configs:
+# - <https://github.com/kittywitch/nixfiles/blob/main/services/prosody.nix>
+# create users with:
+# - `sudo -u prosody prosodyctl adduser colin@uninsane.org`
+
+{ lib, ... }:
+
+# XXX disabled: doesn't send messages to nixnet.social (only receives them).
+# nixnet runs ejabberd, so revisiting that.
+lib.mkIf false
+{
+  sane.persist.sys.plaintext = [
+    { user = "prosody"; group = "prosody"; directory = "/var/lib/prosody"; }
+  ];
+  networking.firewall.allowedTCPPorts = [
+    5222  # XMPP client -> server
+    5269  # XMPP server -> server
+    5280  # bosh
+    5281  # Prosody HTTPS port  (necessary?)
+  ];
+
+  # provide access to certs
+  users.users.prosody.extraGroups = [ "nginx" ];
+
+  security.acme.certs."uninsane.org".extraDomainNames = [
+    "conference.xmpp.uninsane.org"
+    "upload.xmpp.uninsane.org"
+  ];
+
+  services.prosody = {
+    enable = true;
+    admins = [ "colin@uninsane.org" ];
+    # allowRegistration = false;
+    # extraConfig = ''
+    #   s2s_require_encryption = true
+    #   c2s_require_encryption = true
+    # '';
+
+    extraModules = [ "private" "vcard" "privacy" "compression" "component" "muc" "pep" "adhoc" "lastactivity" "admin_adhoc" "blocklist"];
+
+    ssl.cert = "/var/lib/acme/uninsane.org/fullchain.pem";
+    ssl.key = "/var/lib/acme/uninsane.org/key.pem";
+
+    muc = [
+      {
+        domain = "conference.xmpp.uninsane.org";
+      }
+    ];
+    uploadHttp.domain = "upload.xmpp.uninsane.org";
+
+    virtualHosts = {
+      localhost = {
+        domain = "localhost";
+        enabled = true;
+      };
+      "xmpp.uninsane.org" = {
+        domain = "uninsane.org";
+        enabled = true;
+        ssl.cert = "/var/lib/acme/uninsane.org/fullchain.pem";
+        ssl.key = "/var/lib/acme/uninsane.org/key.pem";
+      }; 
+    };
+  };
+}

hosts/by-name/servo/services/transmission.nix

@@ -0,0 +1,80 @@
+{ pkgs, ... }:
+
+{
+  sane.persist.sys.plaintext = [
+    # TODO: mode? we need this specifically for the stats tracking in .config/
+    { user = "transmission"; group = "transmission"; directory = "/var/lib/transmission"; }
+  ];
+  services.transmission.enable = true;
+  services.transmission.settings = {
+    rpc-bind-address = "0.0.0.0";
+    #rpc-host-whitelist = "bt.uninsane.org";
+    #rpc-whitelist = "*.*.*.*";
+    rpc-authentication-required = true;
+    rpc-username = "colin";
+    # salted pw. to regenerate, set this plaintext, run nixos-rebuild, and then find the salted pw in:
+    # /var/lib/transmission/.config/transmission-daemon/settings.json
+    rpc-password = "{503fc8928344f495efb8e1f955111ca5c862ce0656SzQnQ5";
+    rpc-whitelist-enabled = false;
+
+    # download-dir = "/opt/uninsane/media/";
+    # hopefully, make the downloads world-readable
+    umask = 0;
+
+    # force peer connections to be encrypted
+    encryption = 2;
+
+    # units in kBps
+    speed-limit-down = 3000;
+    speed-limit-down-enabled = true;
+    speed-limit-up = 300;
+    speed-limit-up-enabled = true;
+
+    # see: https://git.zknt.org/mirror/transmission/commit/cfce6e2e3a9b9d31a9dafedd0bdc8bf2cdb6e876?lang=bg-BG
+    anti-brute-force-enabled = false;
+
+    download-dir = "/var/lib/uninsane/media";
+    incomplete-dir = "/var/lib/uninsane/media/incomplete";
+
+  };
+  # transmission will by default not allow the world to read its files.
+  services.transmission.downloadDirPermissions = "775";
+
+  systemd.services.transmission.after = [ "wireguard-wg-ovpns.service" ];
+  systemd.services.transmission.partOf = [ "wireguard-wg-ovpns.service" ];
+  systemd.services.transmission.serviceConfig = {
+    # run this behind the OVPN static VPN
+    NetworkNamespacePath = "/run/netns/ovpns";
+    LogLevelMax = "warning";
+  };
+
+  # service to automatically backup torrents i add to transmission
+  systemd.services.backup-torrents = {
+    description = "archive torrents to storage not owned by transmission";
+    script = ''
+      ${pkgs.rsync}/bin/rsync -arv /var/lib/transmission/.config/transmission-daemon/torrents/ /var/backup/torrents/
+    '';
+  };
+  systemd.timers.backup-torrents = {
+    wantedBy = [ "multi-user.target" ];
+    timerConfig = {
+      OnStartupSec = "11min";
+      OnUnitActiveSec = "240min";
+    };
+  };
+
+  # transmission web client
+  services.nginx.virtualHosts."bt.uninsane.org" = {
+    # basicAuth is literally cleartext user/pw, so FORCE this to happen over SSL
+    forceSSL = true;
+    enableACME = true;
+    # inherit kTLS;
+    locations."/" = {
+      # proxyPass = "http://ovpns.uninsane.org:9091";
+      proxyPass = "http://10.0.1.6:9091";
+    };
+  };
+
+  sane.services.trust-dns.zones."uninsane.org".inet.CNAME."bt" = "native";
+}
+

hosts/by-name/servo/services/trust-dns.nix

@@ -0,0 +1,67 @@
+{ config, pkgs, ... }:
+
+{
+  sane.services.trust-dns.enable = true;
+
+  sane.services.trust-dns.listenAddrsIPv4 = [
+    # specify each address explicitly, instead of using "*".
+    # this ensures responses are sent from the address at which the request was received.
+    "192.168.0.5"
+    "10.0.1.5"
+  ];
+  sane.services.trust-dns.quiet = true;
+
+  sane.services.trust-dns.zones."uninsane.org".TTL = 900;
+
+  # SOA record structure: <https://en.wikipedia.org/wiki/SOA_record#Structure>
+  # SOA MNAME RNAME (... rest)
+  # MNAME = Master name server for this zone. this is where update requests should be sent.
+  # RNAME = admin contact (encoded email address)
+  # Serial = YYYYMMDDNN, where N is incremented every time this file changes, to trigger secondary NS to re-fetch it.
+  # Refresh = how frequently secondary NS should query master
+  # Retry = how long secondary NS should wait until re-querying master after a failure (must be < Refresh)
+  # Expire = how long secondary NS should continue to reply to queries after master fails (> Refresh + Retry)
+  sane.services.trust-dns.zones."uninsane.org".inet = {
+    SOA."@" = ''
+      ns1.uninsane.org. admin-dns.uninsane.org. (
+                                      2022122101 ; Serial
+                                      4h         ; Refresh
+                                      30m        ; Retry
+                                      7d         ; Expire
+                                      5m)        ; Negative response TTL
+    '';
+    TXT."rev" = "2022122101";
+
+    # XXX NS records must also not be CNAME
+    # it's best that we keep this identical, or a superset of, what org. lists as our NS.
+    # so, org. can specify ns2/ns3 as being to the VPN, with no mention of ns1. we provide ns1 here.
+    A."ns1" =    "%NATIVE%";
+    A."ns2" =    "185.157.162.178";
+    A."ns3" =    "185.157.162.178";
+    A."ovpns" =  "185.157.162.178";
+    A."native" = "%NATIVE%";
+    A."@" =      "%NATIVE%";
+    NS."@" = [
+      "ns1.uninsane.org."
+      "ns2.uninsane.org."
+      "ns3.uninsane.org."
+    ];
+  };
+
+  sane.services.trust-dns.zones."uninsane.org".file =
+    "/var/lib/trust-dns/uninsane.org.zone";
+
+  systemd.services.trust-dns.preStart = let
+    sed = "${pkgs.gnused}/bin/sed";
+    zone-dir = "/var/lib/trust-dns";
+    zone-out = "${zone-dir}/uninsane.org.zone";
+    zone-template = pkgs.writeText "uninsane.org.zone.in" config.sane.services.trust-dns.generatedZones."uninsane.org";
+  in ''
+    # make WAN records available to trust-dns
+    mkdir -p ${zone-dir}
+    ip=$(cat '${config.sane.services.dyn-dns.ipPath}')
+    ${sed} s/%NATIVE%/$ip/ ${zone-template} > ${zone-out}
+  '';
+
+  sane.services.dyn-dns.restartOnChange = [ "trust-dns.service" ];
+}

hosts/by-name/servo/services/wikipedia.nix

@@ -0,0 +1,30 @@
+# docs: <https://nixos.wiki/wiki/MediaWiki>
+{ config, lib, ... }:
+
+# XXX: working to host wikipedia with kiwix instead of mediawiki
+# mediawiki does more than i need and isn't obviously superior in any way
+# except that the dumps are more frequent/up-to-date.
+lib.mkIf false
+{
+  sops.secrets."mediawiki_pw" = {
+    owner = config.users.users.mediawiki.name;
+  };
+
+  services.mediawiki.enable = true;
+  services.mediawiki.name = "Uninsane Wiki";
+  services.mediawiki.passwordFile = config.sops.secrets.mediawiki_pw.path;
+  services.mediawiki.extraConfig = ''
+    # Disable anonymous editing
+    $wgGroupPermissions['*']['edit'] = false;
+  '';
+  services.mediawiki.virtualHost.listen = [
+    {
+      ip = "127.0.0.1";
+      port = 8013;
+      ssl = false;
+    }
+  ];
+  services.mediawiki.virtualHost.hostName = "w.uninsane.org";
+  services.mediawiki.virtualHost.adminAddr = "admin+mediawiki@uninsane.org";
+  # services.mediawiki.extensions = TODO: wikipedia sync extension?
+}

hosts/common/cross.nix

@@ -0,0 +1,22 @@
+{ config, ... }:
+
+let
+  mkCrossFrom = localSystem: pkgs: import pkgs.path {
+    inherit localSystem;
+    crossSystem = pkgs.stdenv.hostPlatform.system;
+    inherit (config.nixpkgs) config overlays;
+  };
+in
+{
+  # the configuration of which specific package set `pkgs.cross` refers to happens elsewhere;
+  # here we just define them all.
+  nixpkgs.overlays = [
+    (next: prev: {
+      # non-emulated packages build *from* local *for* target.
+      # for large packages like the linux kernel which are expensive to build under emulation,
+      # the config can explicitly pull such packages from `pkgs.cross` to do more efficient cross-compilation.
+      crossFrom."x86_64-linux" = mkCrossFrom "x86_64-linux" next;
+      crossFrom."aarch64-linux" = mkCrossFrom "aarch64-linux" next;
+    })
+  ];
+}

hosts/common/default.nix

@@ -0,0 +1,84 @@
+{ pkgs, ... }:
+{
+  imports = [
+    ./cross.nix
+    ./feeds.nix
+    ./fs.nix
+    ./hardware.nix
+    ./home
+    ./i2p.nix
+    ./ids.nix
+    ./machine-id.nix
+    ./net.nix
+    ./secrets.nix
+    ./ssh.nix
+    ./users.nix
+    ./vpn.nix
+  ];
+
+  sane.home-manager.enable = true;
+  sane.nixcache.enable-trusted-keys = true;
+  sane.packages.enableConsolePkgs = true;
+  sane.packages.enableSystemPkgs = true;
+
+  sane.persist.sys.plaintext = [
+    "/var/log"
+    "/var/backup"  # for e.g. postgres dumps
+    # TODO: move elsewhere
+    "/var/lib/alsa"                # preserve output levels, default devices
+    "/var/lib/colord"              # preserve color calibrations (?)
+    "/var/lib/machines"            # maybe not needed, but would be painful to add a VM and forget.
+  ];
+
+  # some services which use private directories error if the parent (/var/lib/private) isn't 700.
+  sane.fs."/var/lib/private".dir.acl.mode = "0700";
+
+  nixpkgs.config.allowUnfree = true;
+
+  # time.timeZone = "America/Los_Angeles";
+  time.timeZone = "Etc/UTC";  # DST is too confusing for me => use a stable timezone
+
+  # allow `nix flake ...` command
+  nix.extraOptions = ''
+    experimental-features = nix-command flakes
+  '';
+  # allow `nix-shell` (and probably nix-index?) to locate our patched and custom packages
+  nix.nixPath = [
+    "nixpkgs=${pkgs.path}"
+    "nixpkgs-overlays=${../..}/overlays"
+  ];
+
+  fonts = {
+    enableDefaultFonts = true;
+    fonts = with pkgs; [ font-awesome twitter-color-emoji hack-font ];
+    fontconfig.enable = true;
+    fontconfig.defaultFonts = {
+      emoji = [ "Font Awesome 6 Free" "Twitter Color Emoji" ];
+      monospace = [ "Hack" ];
+      serif = [ "DejaVu Serif" ];
+      sansSerif = [ "DejaVu Sans" ];
+    };
+  };
+
+  # disable non-required packages like nano, perl, rsync, strace
+  environment.defaultPackages = [];
+
+  # programs.vim.defaultEditor = true;
+  environment.variables = {
+    EDITOR = "vim";
+    # git claims it should use EDITOR, but it doesn't!
+    GIT_EDITOR = "vim";
+    # TODO: these should be moved to `home.sessionVariables` (home-manager)
+    # Electron apps should use native wayland backend:
+    #   https://nixos.wiki/wiki/Slack#Wayland
+    # Discord under sway crashes with this.
+    # NIXOS_OZONE_WL = "1";
+    # LIBGL_ALWAYS_SOFTWARE = "1";
+  };
+  # enable zsh completions
+  environment.pathsToLink = [ "/share/zsh" ];
+
+  # link debug symbols into /run/current-system/sw/lib/debug
+  # hopefully picked up by gdb automatically?
+  environment.enableDebugInfo = true;
+}

hosts/common/feeds.nix

@@ -0,0 +1,203 @@
+{ lib, sane-data, ... }:
+let
+  hourly = { freq = "hourly"; };
+  daily = { freq = "daily"; };
+  weekly = { freq = "weekly"; };
+  infrequent = { freq = "infrequent"; };
+
+  art = { cat = "art"; };
+  humor = { cat = "humor"; };
+  pol = { cat = "pol"; };  # or maybe just "social"
+  rat = { cat = "rat"; };
+  tech = { cat = "tech"; };
+  uncat = { cat = "uncat"; };
+
+  text = { format = "text"; };
+  img = { format = "image"; };
+
+  mkRss = format: url: { inherit url format; } // uncat // infrequent;
+  # format-specific helpers
+  mkText = mkRss "text";
+  mkImg = mkRss "image";
+  mkPod = mkRss "podcast";
+
+  # host-specific helpers
+  mkSubstack = subdomain: { substack = subdomain; };
+
+  fromDb = name:
+    let
+      raw = sane-data.feeds."${name}";
+    in {
+      url = raw.url;
+      # not sure the exact mapping with velocity here: entries per day?
+      freq = lib.mkIf (raw.velocity or 0 != 0) (lib.mkDefault (
+        if raw.velocity > 2 then
+          "hourly"
+        else if raw.velocity > 0.5 then
+          "daily"
+        else if raw.velocity > 0.1 then
+          "weekly"
+        else
+          "infrequent"
+      ));
+    } // lib.optionalAttrs (raw.is_podcast or false) {
+      format = "podcast";
+    } // lib.optionalAttrs (raw.title or "" != "") {
+      title = lib.mkDefault raw.title;
+    };
+
+  podcasts = [
+    (fromDb "lexfridman.com/podcast" // rat)
+    ## Astral Codex Ten
+    (fromDb "sscpodcast.libsyn.com" // rat)
+    ## Econ Talk
+    (fromDb "feeds.simplecast.com/wgl4xEgL" // rat)
+    ## Cory Doctorow -- both podcast & text entries
+    (fromDb "craphound.com" // pol)
+    (fromDb "congressionaldish.libsyn.com" // pol)
+    ## Civboot -- https://anchor.fm/civboot
+    (fromDb "anchor.fm/s/34c7232c/podcast/rss" // tech)
+    ## Emerge: making sense of what's next -- <https://www.whatisemerging.com/emergepodcast>
+    (mkPod "https://anchor.fm/s/21bc734/podcast/rss" // pol // infrequent)
+    (fromDb "feeds.feedburner.com/80000HoursPodcast" // rat)
+    (fromDb "allinchamathjason.libsyn.com" // pol)
+    (fromDb "acquired.libsyn.com" // tech)
+    # The Intercept - Deconstructed; also available: <rss.acast.com/deconstructed>
+    (fromDb "rss.prod.firstlook.media/deconstructed/podcast.rss" // pol)
+    ## The Daily
+    (mkPod "https://feeds.simplecast.com/54nAGcIl" // pol // daily)
+    # The Intercept - Intercepted; also available: <https://rss.acast.com/intercepted-with-jeremy-scahill>
+    (fromDb "rss.prod.firstlook.media/intercepted/podcast.rss" // pol)
+    (fromDb "podcast.posttv.com/itunes/post-reports.xml" // pol)
+    ## Eric Weinstein
+    (fromDb "rss.art19.com/the-portal" // rat)
+    (fromDb "darknetdiaries.com" // tech)
+    ## Radiolab -- also available here, but ONLY OVER HTTP: <http://feeds.wnyc.org/radiolab>
+    (fromDb "feeds.feedburner.com/radiolab" // pol)
+    ## Sam Harris
+    (fromDb "wakingup.libsyn.com" // pol)
+    ## 99% Invisible -- also available here: <https://feeds.simplecast.com/BqbsxVfO>
+    (fromDb "feeds.99percentinvisible.org/99percentinvisible" // pol)
+    (fromDb "rss.acast.com/ft-tech-tonic" // tech)
+    (fromDb "feeds.feedburner.com/dancarlin/history" // rat)
+    (fromDb "rss.art19.com/60-minutes" // pol)
+    ## The Verge - Decoder
+    (fromDb "feeds.megaphone.fm/recodedecode" // tech)
+    ## Matrix (chat) Live
+    (fromDb "feed.podbean.com/matrixlive/feed.xml" // tech)
+    ## Michael Malice - Your Welcome -- also available here: <https://origin.podcastone.com/podcast?categoryID2=2232>
+    (fromDb "rss.art19.com/your-welcome" // pol)
+    (fromDb "seattlenice.buzzsprout.com" // pol)
+    ## Sci-Fi? has Peter Watts; author of No Moods, Ads or Cutesy Fucking Icons (rifters.com)
+    (fromDb "talesfromthebridge.buzzsprout.com" // tech)
+  ];
+
+  texts = [
+    # AGGREGATORS (> 1 post/day)
+    (fromDb "lwn.net" // tech)
+    (fromDb "lesswrong.com" // rat)
+    (fromDb "econlib.org" // pol)
+
+    # AGGREGATORS (< 1 post/day)
+    (fromDb "palladiummag.com" // uncat)
+    (fromDb "profectusmag.com" // uncat)
+    (fromDb "semiaccurate.com" // tech)
+    (mkText "https://linuxphoneapps.org/blog/atom.xml" // tech // infrequent)
+    (fromDb "spectrum.ieee.org" // tech)
+    ## n.b.: quality RSS list here: <https://forum.merveilles.town/thread/57/share-your-rss-feeds%21-6/>
+    (mkText "https://forum.merveilles.town/rss.xml" // pol // infrequent)
+
+    ## No Moods, Ads or Cutesy Fucking Icons
+    (fromDb "rifters.com/crawl" // uncat)
+
+    # DEVELOPERS
+    (fromDb "uninsane.org" // tech)
+    (fromDb "mg.lol" // tech)
+    (fromDb "drewdevault.com" // tech)
+    ## Ken Shirriff
+    (fromDb "righto.com" // tech)
+    ## shared blog by a few NixOS devs, notably onny
+    (fromDb "project-insanity.org" // tech)
+    ## Vitalik Buterin
+    (fromDb "vitalik.ca" // tech)
+    ## ian (Sanctuary)
+    (fromDb "sagacioussuricata.com" // tech)
+    ## Bunnie Juang
+    (fromDb "bunniestudios.com" // tech)
+    (fromDb "blog.danieljanus.pl" // tech)
+    (fromDb "ianthehenry.com" // tech)
+    (fromDb "bitbashing.io" // tech)
+    (fromDb "idiomdrottning.org" // uncat)
+    (mkText "https://anish.lakhwara.com/home.html" // tech // weekly)
+    (fromDb "jefftk.com" // tech)
+    (fromDb "pomeroyb.com" // tech)
+
+    # (TECH; POL) COMMENTATORS
+    ## Matt Webb -- engineering-ish, but dreamy
+    (fromDb "interconnected.org/home/feed" // rat)
+    (fromDb "edwardsnowden.substack.com" // pol // text)
+    ## Julia Evans
+    (mkText "https://jvns.ca/atom.xml" // tech // weekly)
+    (mkText "http://benjaminrosshoffman.com/feed" // pol // weekly)
+    ## Ben Thompson
+    (mkText "https://www.stratechery.com/rss" // pol // weekly)
+    ## Balaji
+    (fromDb "balajis.com" // pol)
+    (fromDb "ben-evans.com/benedictevans" // pol)
+    (fromDb "lynalden.com" // pol)
+    (fromDb "austinvernon.site" // tech)
+    (mkSubstack "oversharing" // pol // daily)
+    (mkSubstack "doomberg" // tech // weekly)
+    ## David Rosenthal
+    (fromDb "blog.dshr.org" // pol)
+    ## Matt Levine
+    (mkText "https://www.bloomberg.com/opinion/authors/ARbTQlRLRjE/matthew-s-levine.rss" // pol // weekly)
+    (fromDb "stpeter.im/atom.xml" // pol)
+    ## Peter Saint-Andre -- side project of stpeter.im
+    (fromDb "philosopher.coach" // rat)
+
+    # RATIONALITY/PHILOSOPHY/ETC
+    (mkSubstack "samkriss" // humor // infrequent)
+    (fromDb "unintendedconsequenc.es" // rat)
+    (fromDb "applieddivinitystudies.com" // rat)
+    (fromDb "slimemoldtimemold.com" // rat)
+    (fromDb "richardcarrier.info" // rat)
+    (fromDb "gwern.net" // rat)
+    ## Jason Crawford
+    (fromDb "rootsofprogress.org" // rat)
+    ## Robin Hanson
+    (fromDb "overcomingbias.com" // rat)
+    ## Scott Alexander
+    (mkSubstack "astralcodexten" // rat // daily)
+    ## Paul Christiano
+    (fromDb "sideways-view.com" // rat)
+    ## Sean Carroll
+    (fromDb "preposterousuniverse.com" // rat)
+
+    ## mostly dating topics. not advice, or humor, but looking through a social lens
+    (fromDb "putanumonit.com" // rat)
+
+    # CODE
+    # (mkText "https://github.com/Kaiteki-Fedi/Kaiteki/commits/master.atom" // tech // infrequent)
+  ];
+
+  images = [
+    (fromDb "smbc-comics.com" // img // humor)
+    (fromDb "xkcd.com" // img // humor)
+    (fromDb "pbfcomics.com" // img // humor)
+    # (mkImg "http://dilbert.com/feed" // humor // daily)
+
+    # ART
+    (fromDb "miniature-calendar.com" // img // art // daily)
+  ];
+in
+{
+  sane.feeds = texts ++ images ++ podcasts;
+
+  assertions = builtins.map
+    (p: {
+      assertion = p.format or "unknown" == "podcast";
+      message = ''${p.url} is not a podcast: ${p.format or "unknown"}'';
+    })
+    podcasts;
+}

hosts/common/fs.nix

@@ -0,0 +1,74 @@
+{ pkgs, ... }:
+
+let sshOpts = rec {
+  fsType = "fuse.sshfs";
+  optionsBase = [
+    "x-systemd.automount"
+    "_netdev"
+    "user"
+    "identityfile=/home/colin/.ssh/id_ed25519"
+    "allow_other"
+    "default_permissions"
+  ];
+  optionsColin = optionsBase ++ [
+    "transform_symlinks"
+    "idmap=user"
+    "uid=1000"
+    "gid=100"
+  ];
+
+  optionsRoot = optionsBase ++ [
+    # we don't transform_symlinks because that breaks the validity of remote /nix stores
+    "sftp_server=/run/wrappers/bin/sudo\\040/run/current-system/sw/libexec/sftp-server"
+  ];
+};
+in
+{
+  environment.pathsToLink = [
+    # needed to achieve superuser access for user-mounted filesystems (see optionsRoot above)
+    # we can only link whole directories here, even though we're only interested in pkgs.openssh
+    "/libexec"
+  ];
+
+  fileSystems."/mnt/servo-media-wan" = {
+    device = "colin@uninsane.org:/var/lib/uninsane/media";
+    inherit (sshOpts) fsType;
+    options = sshOpts.optionsColin;
+    noCheck = true;
+  };
+  fileSystems."/mnt/servo-media-lan" = {
+    device = "colin@servo:/var/lib/uninsane/media";
+    inherit (sshOpts) fsType;
+    options = sshOpts.optionsColin;
+    noCheck = true;
+  };
+  fileSystems."/mnt/servo-root-wan" = {
+    device = "colin@uninsane.org:/";
+    inherit (sshOpts) fsType;
+    options = sshOpts.optionsRoot;
+    noCheck = true;
+  };
+  fileSystems."/mnt/servo-root-lan" = {
+    device = "colin@servo:/";
+    inherit (sshOpts) fsType;
+    options = sshOpts.optionsRoot;
+    noCheck = true;
+  };
+  fileSystems."/mnt/desko-home" = {
+    device = "colin@desko:/home/colin";
+    inherit (sshOpts) fsType;
+    options = sshOpts.optionsColin;
+    noCheck = true;
+  };
+  fileSystems."/mnt/desko-root" = {
+    device = "colin@desko:/";
+    inherit (sshOpts) fsType;
+    options = sshOpts.optionsRoot;
+    noCheck = true;
+  };
+
+  environment.systemPackages = [
+    pkgs.sshfs-fuse
+  ];
+}
+

hosts/common/hardware.nix

@@ -0,0 +1,40 @@
+{ lib, pkgs, ... }:
+
+{
+  boot.initrd.supportedFilesystems = [ "ext4" "btrfs" "ext2" "ext3" "vfat" ];
+  # useful emergency utils
+  boot.initrd.extraUtilsCommands = ''
+    copy_bin_and_libs ${pkgs.btrfs-progs}/bin/btrfstune
+  '';
+  boot.kernelParams = [ "boot.shell_on_fail" ];
+  # other kernelParams:
+  #   "boot.trace"
+  #   "systemd.log_level=debug"
+  #   "systemd.log_target=console"
+
+  # hack in the `boot.shell_on_fail` arg since that doesn't always seem to work.
+  boot.initrd.preFailCommands = "allowShell=1";
+
+  # default: 4 (warn). 7 is debug
+  boot.consoleLogLevel = 7;
+
+  boot.loader.grub.enable = lib.mkDefault false;
+  boot.loader.generic-extlinux-compatible.enable = lib.mkDefault true;
+
+  # non-free firmware
+  hardware.enableRedistributableFirmware = true;
+  services.fwupd.enable = true;
+
+  # powertop will default to putting USB devices -- including HID -- to sleep after TWO SECONDS
+  powerManagement.powertop.enable = false;
+
+  # services.snapper.configs = {
+  #   root = {
+  #     subvolume = "/";
+  #     extraConfig = {
+  #       ALLOW_USERS = "colin";
+  #     };
+  #   };
+  # };
+  # services.snapper.snapshotInterval = "daily";
+}

hosts/common/home/aerc.nix

@@ -0,0 +1,12 @@
+# Terminal UI mail client
+{ config, lib, sane-lib, ... }:
+
+lib.mkIf config.sane.home-manager.enable
+{
+  sops.secrets."aerc_accounts" = {
+    owner = config.users.users.colin.name;
+    sopsFile = ../../../secrets/universal/aerc_accounts.conf;
+    format = "binary";
+  };
+  sane.fs."/home/colin/.config/aerc/accounts.conf" = sane-lib.fs.wantedSymlinkTo config.sops.secrets.aerc_accounts.path;
+}

hosts/common/home/default.nix

@@ -0,0 +1,23 @@
+{ ... }:
+{
+  imports = [
+    ./aerc.nix
+    ./firefox.nix
+    ./gfeeds.nix
+    ./git.nix
+    ./gpodder.nix
+    ./keyring.nix
+    ./kitty.nix
+    ./libreoffice.nix
+    ./mime.nix
+    ./mpv.nix
+    ./neovim.nix
+    ./newsflash.nix
+    ./splatmoji.nix
+    ./ssh.nix
+    ./sublime-music.nix
+    ./vlc.nix
+    ./xdg-dirs.nix
+    ./zsh
+  ];
+}

hosts/common/home/firefox.nix

@@ -0,0 +1,199 @@
+# common settings to toggle (at runtime, in about:config):
+#   > security.ssl.require_safe_negotiation
+
+# librewolf is a forked firefox which patches firefox to allow more things
+# (like default search engines) to be configurable at runtime.
+# many of the settings below won't have effect without those patches.
+# see: https://gitlab.com/librewolf-community/settings/-/blob/master/distribution/policies.json
+
+{ config, lib, pkgs, sane-lib, ...}:
+with lib;
+let
+  cfg = config.sane.web-browser;
+  # allow easy switching between firefox and librewolf with `defaultSettings`, below
+  librewolfSettings = {
+    browser = pkgs.librewolf-unwrapped;
+    # browser = pkgs.librewolf-unwrapped.overrideAttrs (drv: {
+    #   # this allows side-loading unsigned addons
+    #   MOZ_REQUIRE_SIGNING = false;
+    # });
+    libName = "librewolf";
+    dotDir = ".librewolf";
+    cacheDir = ".cache/librewolf";  # TODO: is it?
+    desktop = "librewolf.desktop";
+  };
+  firefoxSettings = {
+    browser = pkgs.firefox-esr-unwrapped;
+    libName = "firefox";
+    dotDir = ".mozilla/firefox";
+    cacheDir = ".cache/mozilla";
+    desktop = "firefox.desktop";
+  };
+  defaultSettings = firefoxSettings;
+  # defaultSettings = librewolfSettings;
+
+  addon = name: extid: hash: pkgs.fetchFirefoxAddon {
+    inherit name hash;
+    url = "https://addons.mozilla.org/firefox/downloads/latest/${name}/latest.xpi";
+    # extid can be found by unar'ing the above xpi, and copying browser_specific_settings.gecko.id field
+    fixedExtid = extid;
+  };
+  localAddon = pkg: pkgs.fetchFirefoxAddon {
+    inherit (pkg) name;
+    src = "${pkg}/share/mozilla/extensions/\\{ec8030f7-c20a-464f-9b0e-13a3a9e97384\\}/${pkg.extid}.xpi";
+    fixedExtid = pkg.extid;
+  };
+
+  package = pkgs.wrapFirefox cfg.browser.browser {
+    # inherit the default librewolf.cfg
+    # it can be further customized via ~/.librewolf/librewolf.overrides.cfg
+    inherit (pkgs.librewolf-unwrapped) extraPrefsFiles;
+    inherit (cfg.browser) libName;
+
+    extraNativeMessagingHosts = [ pkgs.browserpass ];
+    # extraNativeMessagingHosts = [ pkgs.gopass-native-messaging-host ];
+
+    nixExtensions = concatMap (ext: optional ext.enable ext.package) (attrValues cfg.addons);
+
+    extraPolicies = {
+      NoDefaultBookmarks = true;
+      SearchEngines = {
+        Default = "DuckDuckGo";
+      };
+      AppUpdateURL = "https://localhost";
+      DisableAppUpdate = true;
+      OverrideFirstRunPage = "";
+      OverridePostUpdatePage = "";
+      DisableSystemAddonUpdate = true;
+      DisableFirefoxStudies = true;
+      DisableTelemetry = true;
+      DisableFeedbackCommands = true;
+      DisablePocket = true;
+      DisableSetDesktopBackground = false;
+
+      # remove many default search providers
+      # XXX this seems to prevent the `nixExtensions` from taking effect
+      # Extensions.Uninstall = [
+      #   "google@search.mozilla.org"
+      #   "bing@search.mozilla.org"
+      #   "amazondotcom@search.mozilla.org"
+      #   "ebay@search.mozilla.org"
+      #   "twitter@search.mozilla.org"
+      # ];
+      # XXX doesn't seem to have any effect...
+      # docs: https://github.com/mozilla/policy-templates#homepage
+      # Homepage = {
+      #   HomepageURL = "https://uninsane.org/";
+      #   StartPage = "homepage";
+      # };
+      # NewTabPage = true;
+    };
+  };
+
+  addonOpts = types.submodule {
+    options = {
+      package = mkOption {
+        type = types.package;
+      };
+      enable = mkOption {
+        type = types.bool;
+      };
+    };
+  };
+in
+{
+  options = {
+    sane.web-browser.browser = mkOption {
+      default = defaultSettings;
+      type = types.attrs;
+    };
+    sane.web-browser.persistData = mkOption {
+      description = "optional store name to which persist browsing data (like history)";
+      type = types.nullOr types.str;
+      default = null;
+    };
+    sane.web-browser.persistCache = mkOption {
+      description = "optional store name to which persist browser cache";
+      type = types.nullOr types.str;
+      default = "cryptClearOnBoot";
+    };
+    sane.web-browser.addons = mkOption {
+      type = types.attrsOf addonOpts;
+      default = {
+        # get names from:
+        # - ~/ref/nix-community/nur-combined/repos/rycee/pkgs/firefox-addons/generated-firefox-addons.nix
+        # `wget ...xpi`; `unar ...xpi`; `cat */manifest.json | jq '.browser_specific_settings.gecko.id'`
+        # browserpass-ce.package = addon "browserpass-ce" "browserpass@maximbaz.com" "sha256-sXgUBbRvMnRpeIW1MTkmTcoqtW/8RDXAkxAq1evFkpc=";
+        browserpass-extension.package = localAddon pkgs.browserpass-extension;
+        bypass-paywalls-clean.package = addon "bypass-paywalls-clean" "{d133e097-46d9-4ecc-9903-fa6a722a6e0e}" "sha256-JOj5P7c2JTTReHCRZXm4BscaGr3i+9Y4Ey/y621x8PI=";
+        ether-metamask.package = addon "ether-metamask" "webextension@metamask.io" "sha256-G+MwJDOcsaxYSUXjahHJmkWnjLeQ0Wven8DU/lGeMzA=";
+        i2p-in-private-browsing.package = addon "i2p-in-private-browsing" "i2ppb@eyedeekay.github.io" "sha256-dJcJ3jxeAeAkRvhODeIVrCflvX+S4E0wT/PyYzQBQWs=";
+        sidebery.package = addon "sidebery" "{3c078156-979c-498b-8990-85f7987dd929}" "sha256-YONfK/rIjlsrTgRHIt3km07Q7KnpIW89Z9r92ZSCc6w=";
+        sponsorblock.package = addon "sponsorblock" "sponsorBlocker@ajay.app" "sha256-d2K3ufvurWnYVzqLbyR//MgejybkY9exitAf9RdLNRo=";
+        ublacklist.package = addon "ublacklist" "@ublacklist" "sha256-RqY5iHzbL2qizth7aguyOKWPyINXmrwOlf/OsfqAS48=";
+        ublock-origin.package = addon "ublock-origin" "uBlock0@raymondhill.net" "sha256-a/ivUmY1P6teq9x0dt4CbgHt+3kBsEMMXlOfZ5Hx7cg=";
+
+        browserpass-extension.enable = lib.mkDefault true;
+        bypass-paywalls-clean.enable = lib.mkDefault true;
+        ether-metamask.enable = lib.mkDefault true;
+        i2p-in-private-browsing.enable = lib.mkDefault config.services.i2p.enable;
+        sidebery.enable = lib.mkDefault true;
+        sponsorblock.enable = lib.mkDefault true;
+        ublacklist.enable = lib.mkDefault true;
+        ublock-origin.enable = lib.mkDefault true;
+      };
+    };
+  };
+
+  config = lib.mkIf config.sane.home-manager.enable {
+
+    # uBlock filter list configuration.
+    # specifically, enable the GDPR cookie prompt blocker.
+    # data.toOverwrite.filterLists is additive (i.e. it supplements the default filters)
+    # this configuration method is documented here:
+    # - <https://github.com/gorhill/uBlock/issues/2986#issuecomment-364035002>
+    # the specific attribute path is found via scraping ublock code here:
+    # - <https://github.com/gorhill/uBlock/blob/master/src/js/storage.js>
+    # - <https://github.com/gorhill/uBlock/blob/master/assets/assets.json>
+    sane.fs."/home/colin/${cfg.browser.dotDir}/managed-storage/uBlock0@raymondhill.net.json" = sane-lib.fs.wantedText ''
+      {
+       "name": "uBlock0@raymondhill.net",
+       "description": "ignored",
+       "type": "storage",
+       "data": {
+          "toOverwrite": "{\"filterLists\": [\"fanboy-cookiemonster\"]}"
+       }
+      }
+    '';
+    sane.fs."/home/colin/${cfg.browser.dotDir}/${cfg.browser.libName}.overrides.cfg" = sane-lib.fs.wantedText ''
+      // if we can't query the revocation status of a SSL cert because the issuer is offline,
+      // treat it as unrevoked.
+      // see: <https://librewolf.net/docs/faq/#im-getting-sec_error_ocsp_server_error-what-can-i-do>
+      defaultPref("security.OCSP.require", false);
+    '';
+
+    sane.packages.extraGuiPkgs = [ package ];
+    # flush the cache to disk to avoid it taking up too much tmp
+    sane.persist.home.byPath."${cfg.browser.cacheDir}" = lib.mkIf (cfg.persistCache != null) {
+      store = cfg.persistCache;
+    };
+
+    sane.persist.home.byPath."${cfg.browser.dotDir}/default" = lib.mkIf (cfg.persistData != null) {
+      store = cfg.persistData;
+    };
+    sane.fs."/home/colin/${cfg.browser.dotDir}/default" = sane-lib.fs.wantedDir;
+    # instruct Firefox to put the profile in a predictable directory (so we can do things like persist just it).
+    # XXX: the directory *must* exist, even if empty; Firefox will not create the directory itself.
+    sane.fs."/home/colin/${cfg.browser.dotDir}/profiles.ini" = sane-lib.fs.wantedText ''
+      [Profile0]
+      Name=default
+      IsRelative=1
+      Path=default
+      Default=1
+
+      [General]
+      StartWithLastProfile=1
+    '';
+
+  };
+}

hosts/common/home/gfeeds.nix

@@ -0,0 +1,42 @@
+# gnome feeds RSS viewer
+{ config, lib, sane-lib, ... }:
+
+let
+  feeds = sane-lib.feeds;
+  all-feeds = config.sane.feeds;
+  wanted-feeds = feeds.filterByFormat ["text" "image"] all-feeds;
+in {
+  sane.fs."/home/colin/.config/org.gabmus.gfeeds.json" = sane-lib.fs.wantedText (
+    builtins.toJSON {
+      # feed format is a map from URL to a dict,
+      #   with dict["tags"] a list of string tags.
+      feeds = sane-lib.mapToAttrs (feed: {
+        name = feed.url;
+        value.tags = [ feed.cat feed.freq ];
+      }) wanted-feeds;
+      dark_reader = false;
+      new_first = true;
+      # windowsize = {
+      #   width = 350;
+      #   height = 650;
+      # };
+      max_article_age_days = 90;
+      enable_js = false;
+      max_refresh_threads = 3;
+      # saved_items = {};
+      # read_items = [];
+      show_read_items = true;
+      full_article_title = true;
+      # views: "webview", "reader", "rsscont"
+      default_view = "rsscont";
+      open_links_externally = true;
+      full_feed_name = false;
+      refresh_on_startup = true;
+      tags = lib.unique (
+        (builtins.catAttrs "cat" wanted-feeds) ++ (builtins.catAttrs "freq" wanted-feeds)
+      );
+      open_youtube_externally = false;
+      media_player = "vlc";  # default: mpv
+    }
+  );
+}

hosts/common/home/git.nix

@@ -0,0 +1,19 @@
+{ config, lib, pkgs, sane-lib, ... }:
+
+let
+  mkCfg = lib.generators.toINI { };
+in
+lib.mkIf config.sane.home-manager.enable
+{
+  sane.fs."/home/colin/.config/git/config" = sane-lib.fs.wantedText (mkCfg {
+    user.name = "Colin";
+    user.email = "colin@uninsane.org";
+    alias.co = "checkout";
+    # difftastic docs:
+    # - <https://difftastic.wilfred.me.uk/git.html>
+    diff.tool = "difftastic";
+    difftool.prompt = false;
+    "difftool \"difftastic\"".cmd = ''${pkgs.difftastic}/bin/difft "$LOCAL" "$REMOTE"'';
+    # now run `git difftool` to use difftastic git
+  });
+}

hosts/common/home/gpodder.nix

@@ -0,0 +1,12 @@
+# gnome feeds RSS viewer
+{ config, sane-lib, ... }:
+
+let
+  feeds = sane-lib.feeds;
+  all-feeds = config.sane.feeds;
+  wanted-feeds = feeds.filterByFormat ["podcast"] all-feeds;
+in {
+  sane.fs."/home/colin/.config/gpodderFeeds.opml" = sane-lib.fs.wantedText (
+    feeds.feedsToOpml wanted-feeds
+  );
+}

hosts/common/home/keyring.nix

@@ -0,0 +1,11 @@
+{ config, lib, sane-lib, ... }:
+
+lib.mkIf config.sane.home-manager.enable
+{
+  sane.persist.home.private = [ ".local/share/keyrings" ];
+
+  sane.fs."/home/colin/private/.local/share/keyrings/default" = {
+    generated.script.script = builtins.readFile ../../../scripts/init-keyring;
+    wantedBy = [ config.sane.fs."/home/colin/private".unit ];
+  };
+}

hosts/common/home/kitty.nix

@@ -0,0 +1,69 @@
+{ config, lib, pkgs, sane-lib, ... }:
+
+lib.mkIf config.sane.home-manager.enable
+{
+  sane.fs."/home/colin/.config/kitty/kitty.conf" = sane-lib.fs.wantedText ''
+    # docs: https://sw.kovidgoyal.net/kitty/conf/
+    # disable terminal bell (when e.g. you backspace too many times)
+    enable_audio_bell no
+
+    map ctrl+n new_os_window_with_cwd
+
+    include ${pkgs.kitty-themes}/themes/PaperColor_dark.conf
+  '';
+  # THEME CHOICES:
+  #   docs: https://github.com/kovidgoyal/kitty-themes
+  # theme = "1984 Light";  # dislike: awful, harsh blues/teals
+  # theme = "Adventure Time";  # dislike: harsh (dark)
+  # theme = "Atom One Light";  # GOOD: light theme. all color combos readable. not a huge fan of the blue.
+  # theme = "Belafonte Day";  # dislike: too low contrast for text colors
+  # theme = "Belafonte Night";  # better: dark theme that's easy on the eyes. all combos readable. low contrast.
+  # theme = "Catppuccin";  # dislike: a bit pale/low-contrast (dark)
+  # theme = "Desert";  # mediocre: colors are harsh
+  # theme = "Earthsong";  # BEST: dark theme. readable, good contrast. unique, but decent colors.
+  # theme = "Espresso Libre";  # better: dark theme. readable, but meh colors
+  # theme = "Forest Night";  # decent: very pastel. it's workable, but unconventional and muted/flat.
+  # theme = "Gruvbox Material Light Hard";  # mediocre light theme.
+  # theme = "kanagawabones";  # better: dark theme. colors are too background-y
+  # theme = "Kaolin Dark";  # dislike: too dark
+  # theme = "Kaolin Breeze";  # mediocre: not-too-harsh light theme, but some parts are poor contrast
+  # theme = "Later This Evening";  # mediocre: not-too-harsh dark theme, but cursor is poor contrast
+  # theme = "Material"; # decent: light theme, few colors.
+  # theme = "Mayukai";  # decent: not-too-harsh dark theme. the teal is a bit straining
+  # theme = "Nord";  # mediocre: pale background, low contrast
+  # theme = "One Half Light";  # better: not-too-harsh light theme. contrast could be better
+  # theme = "PaperColor Dark";  # BEST: dark theme, very readable still the colors are background-y
+  # theme = "Parasio Dark";  # dislike: too low contrast
+  # theme = "Pencil Light";  # better: not-too-harsh light theme. decent contrast.
+  # theme = "Pnevma";  # dislike: too low contrast
+  # theme = "Piatto Light";  # better: readable light theme. pleasing colors. powerline prompt is hard to read.
+  # theme = "Rosé Pine Dawn";  # GOOD: light theme. all color combinations are readable. it is very mild -- may need to manually tweak contrast. tasteful colors
+  # theme = "Rosé Pine Moon";  # GOOD: dark theme. tasteful colors. but background is a bit intense
+  # theme = "Sea Shells";  # mediocre. not all color combos are readable
+  # theme = "Solarized Light";  # mediocre: not-too-harsh light theme; GREAT background; but some colors are low contrast
+  # theme = "Solarized Dark Higher Contrast";  # better: dark theme, decent colors
+  # theme = "Sourcerer";  # mediocre: ugly colors
+  # theme = "Space Gray";  # mediocre: too muted
+  # theme = "Space Gray Eighties";  # better: all readable, decent colors
+  # theme = "Spacemacs";  # mediocre: too muted
+  # theme = "Spring";  # mediocre: readable light theme, but the teal is ugly.
+  # theme = "Srcery";  # better: highly readable. colors are ehhh
+  # theme = "Substrata";  # decent: nice colors, but a bit flat.
+  # theme = "Sundried";  # mediocre: the solar text makes me squint
+  # theme = "Symfonic";  # mediocre: the dark purple has low contrast to the black bg.
+  # theme = "Tango Light";  # dislike: teal is too grating
+  # theme = "Tokyo Night Day";  # medicore: too muted
+  # theme = "Tokyo Night";  # better: tasteful. a bit flat
+  # theme = "Tomorrow";  # GOOD: all color combinations are readable. contrast is slightly better than Rose. on the blander side
+  # theme = "Treehouse";  # dislike: the orange is harsh on my eyes.
+  # theme = "Urple";  # dislike: weird palette
+  # theme = "Warm Neon";  # decent: not-too-harsh dark theme. the green is a bit unattractive
+  # theme = "Wild Cherry";  # GOOD: dark theme: nice colors. a bit flat
+  # theme = "Xcodedark";  # dislike: bad palette
+  # theme = "citylights";  # decent: dark theme. some parts have just a bit low contrast
+  # theme = "neobones_light"; # better light theme. the background is maybe too muted
+  # theme = "vimbones";
+  # theme = "zenbones_dark";  # mediocre: readable, but meh colors
+  # theme = "zenbones_light";  # decent: light theme. all colors are readable. contrast is passable but not excellent. highlight color is BAD
+  # theme = "zenwritten_dark";  # mediocre: looks same as zenbones_dark
+}

hosts/common/home/libreoffice.nix

@@ -0,0 +1,15 @@
+{ config, lib, sane-lib, ... }:
+
+lib.mkIf config.sane.home-manager.enable
+{
+  # libreoffice: disable first-run stuff
+  sane.fs."/home/colin/.config/libreoffice/4/user/registrymodifications.xcu" = sane-lib.fs.wantedText ''
+    <?xml version="1.0" encoding="UTF-8"?>
+    <oor:items xmlns:oor="http://openoffice.org/2001/registry" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+      <item oor:path="/org.openoffice.Office.Common/Misc"><prop oor:name="FirstRun" oor:op="fuse"><value>false</value></prop></item>
+      <item oor:path="/org.openoffice.Office.Common/Misc"><prop oor:name="ShowTipOfTheDay" oor:op="fuse"><value>false</value></prop></item>
+    </oor:items>
+  '';
+  # <item oor:path="/org.openoffice.Setup/Product"><prop oor:name="LastTimeDonateShown" oor:op="fuse"><value>1667693880</value></prop></item>
+  # <item oor:path="/org.openoffice.Setup/Product"><prop oor:name="LastTimeGetInvolvedShown" oor:op="fuse"><value>1667693880</value></prop></item>
+}

hosts/common/home/mime.nix

@@ -0,0 +1,43 @@
+{ config, lib, sane-lib, ...}:
+
+let
+  www = config.sane.web-browser.browser.desktop;
+  pdf = "org.gnome.Evince.desktop";
+  md = "obsidian.desktop";
+  thumb = "org.gnome.gThumb.desktop";
+  video = "vlc.desktop";
+  # audio = "mpv.desktop";
+  audio = "vlc.desktop";
+in
+lib.mkIf config.sane.home-manager.enable
+{
+
+  # the xdg mime type for a file can be found with:
+  # - `xdg-mime query filetype path/to/thing.ext`
+  # we can have single associations or a list of associations.
+  # there's also options to *remove* [non-default] associations from specific apps
+  xdg.mime.enable = true;
+  xdg.mime.defaultApplications = {
+    # AUDIO
+    "audio/flac" = audio;
+    "audio/mpeg" = audio;
+    "audio/x-vorbis+ogg" = audio;
+    # IMAGES
+    "image/heif" = thumb;  # apple codec
+    "image/png" = thumb;
+    "image/jpeg" = thumb;
+    # VIDEO
+    "video/mp4" = video;
+    "video/quicktime" = video;
+    "video/x-matroska" = video;
+    # HTML
+    "text/html" = www;
+    "x-scheme-handler/http" = www;
+    "x-scheme-handler/https" = www;
+    "x-scheme-handler/about" = www;
+    "x-scheme-handler/unknown" = www;
+    # RICH-TEXT DOCUMENTS
+    "application/pdf" = pdf;
+    "text/markdown" = md;
+  };
+}

hosts/common/home/mpv.nix

@@ -0,0 +1,11 @@
+{ config, lib, sane-lib, ... }:
+
+lib.mkIf config.sane.home-manager.enable
+{
+  # format is <key>=%<length>%<value>
+  sane.fs."/home/colin/.config/mpv/mpv.conf" = sane-lib.fs.wantedText ''
+    save-position-on-quit=%3%yes
+    keep-open=%3%yes
+  '';
+}
+

hosts/common/home/neovim.nix

@@ -0,0 +1,130 @@
+{ config, lib, pkgs, ... }:
+
+let
+  inherit (builtins) map;
+  inherit (lib) concatMapStrings optionalString;
+  # this structure roughly mirrors home-manager's `programs.neovim.plugins` option
+  plugins = with pkgs.vimPlugins; [
+    # docs: surround-nvim: https://github.com/ur4ltz/surround.nvim/
+    # docs: vim-surround: https://github.com/tpope/vim-surround
+    { plugin = vim-surround; }
+    # docs: fzf-vim (fuzzy finder): https://github.com/junegunn/fzf.vim
+    { plugin = fzf-vim; }
+    ({
+      # docs: tex-conceal-vim: https://github.com/KeitaNakamura/tex-conceal.vim/
+      plugin = tex-conceal-vim;
+      type = "viml";
+      config = ''
+        " present prettier fractions
+        let g:tex_conceal_frac=1
+      '';
+    })
+    ({
+      plugin = vim-SyntaxRange;
+      type = "viml";
+      config = ''
+        " enable markdown-style codeblock highlighting for tex code
+        autocmd BufEnter * call SyntaxRange#Include('```tex', '```', 'tex', 'NonText')
+        " autocmd Syntax tex set conceallevel=2
+      '';
+    })
+    ({
+      # treesitter syntax highlighting: https://nixos.wiki/wiki/Tree_sitters
+      # docs: https://github.com/nvim-treesitter/nvim-treesitter
+      # config taken from: https://github.com/i077/system/blob/master/modules/home/neovim/default.nix
+      # this is required for tree-sitter to even highlight
+      plugin = nvim-treesitter.withAllGrammars;
+      type = "lua";
+      config = ''
+        require'nvim-treesitter.configs'.setup {
+          highlight = {
+            enable = true,
+            -- disable treesitter on Rust so that we can use SyntaxRange
+            -- and leverage TeX rendering in rust projects
+            disable = { "rust", "tex", "latex" },
+            -- disable = { "tex", "latex" },
+            -- true to also use builtin vim syntax highlighting when treesitter fails
+            additional_vim_regex_highlighting = false
+          },
+          incremental_selection = {
+            enable = true,
+            keymaps = {
+              init_selection = "gnn",
+              node_incremental = "grn",
+              mcope_incremental = "grc",
+              node_decremental = "grm"
+            }
+          },
+          indent = {
+            enable = true,
+            disable = {}
+          }
+        }
+
+        vim.o.foldmethod = 'expr'
+        vim.o.foldexpr = 'nvim_treesitter#foldexpr()'
+      '';
+    })
+  ];
+  plugin-packages = map (p: p.plugin) plugins;
+  plugin-config-tex = concatMapStrings (p: optionalString (p.type or "" == "viml") p.config) plugins;
+  plugin-config-lua = concatMapStrings (p: optionalString (p.type or "" == "lua") p.config) plugins;
+in
+lib.mkIf config.sane.home-manager.enable
+{
+  # private because there could be sensitive things in the swap
+  sane.persist.home.private = [ ".cache/vim-swap" ];
+
+  programs.neovim = {
+    # neovim: https://github.com/neovim/neovim
+    enable = true;
+    viAlias = true;
+    vimAlias = true;
+    configure = {
+      packages.myVimPackage = {
+        start = plugin-packages;
+      };
+      customRC = ''
+        " let the terminal handle mouse events, that way i get OS-level ctrl+shift+c/etc
+        " this used to be default, until <https://github.com/neovim/neovim/pull/19290>
+        set mouse=
+
+        " copy/paste to system clipboard
+        set clipboard=unnamedplus
+
+        " screw tabs; always expand them into spaces
+        set expandtab
+
+        " at least don't open files with sections folded by default
+        set nofoldenable
+
+        " allow text substitutions for certain glyphs.
+        " higher number = more aggressive substitution (0, 1, 2, 3)
+        " i only make use of this for tex, but it's unclear how to
+        " apply that *just* to tex and retain the SyntaxRange stuff.
+        set conceallevel=2
+
+        " horizontal rule under the active line
+        " set cursorline
+
+        " highlight trailing space & related syntax errors (doesn't seem to work??)
+        " let c_space_errors=1
+        " let python_space_errors=1
+
+        " enable highlighting of leading/trailing spaces,
+        " and especially tabs
+        " source: https://www.reddit.com/r/neovim/comments/chlmfk/highlight_trailing_whitespaces_in_neovim/
+        set list
+        set listchars=tab:▷\·,trail:·,extends:◣,precedes:◢,nbsp:○
+
+        """"" PLUGIN CONFIG (tex)
+        ${plugin-config-tex}
+
+        """"" PLUGIN CONFIG (lua)
+        lua <<EOF
+        ${plugin-config-lua}
+        EOF
+      '';
+    };
+  };
+}

hosts/common/home/newsflash.nix

@@ -0,0 +1,12 @@
+# news-flash RSS viewer
+{ config, sane-lib, ... }:
+
+let
+  feeds = sane-lib.feeds;
+  all-feeds = config.sane.feeds;
+  wanted-feeds = feeds.filterByFormat ["text" "image"] all-feeds;
+in {
+  sane.fs."/home/colin/.config/newsflashFeeds.opml" = sane-lib.fs.wantedText (
+    feeds.feedsToOpml wanted-feeds
+  );
+}

hosts/common/home/splatmoji.nix

@@ -0,0 +1,19 @@
+# borrows from:
+# - default config: <https://github.com/cspeterson/splatmoji/blob/master/splatmoji.config>
+# - wayland: <https://github.com/cspeterson/splatmoji/issues/32#issuecomment-830862566>
+{ pkgs, sane-lib, ... }:
+
+{
+  sane.persist.home.plaintext = [ ".local/state/splatmoji" ];
+  sane.fs."/home/colin/.config/splatmoji/splatmoji.config" = sane-lib.fs.wantedText ''
+    history_file=/home/colin/.local/state/splatmoji/history
+    history_length=5
+    # TODO: wayland equiv
+    paste_command=xdotool key ctrl+v
+    # rofi_command=${pkgs.wofi}/bin/wofi --dmenu --insensitive --cache-file /dev/null
+    rofi_command=${pkgs.fuzzel}/bin/fuzzel -d -i -w 60
+    xdotool_command=${pkgs.wtype}/bin/wtype
+    # TODO: wayland equiv
+    xsel_command=xsel -b -i
+  '';
+}

hosts/common/home/ssh.nix

@@ -0,0 +1,23 @@
+{ config, lib, pkgs, sane-lib, ... }:
+
+with lib;
+let
+  host = config.networking.hostName;
+  user-pubkey = config.sane.ssh.pubkeys."colin@${host}".asUserKey;
+  host-keys = filter (k: k.user == "root") (attrValues config.sane.ssh.pubkeys);
+  known-hosts-text = concatStringsSep
+    "\n"
+    (map (k: k.asHostKey) host-keys)
+  ;
+in lib.mkIf config.sane.home-manager.enable {
+  # ssh key is stored in private storage
+  sane.persist.home.private = [ ".ssh/id_ed25519" ];
+  sane.fs."/home/colin/.ssh/id_ed25519.pub" = sane-lib.fs.wantedText user-pubkey;
+  sane.fs."/home/colin/.ssh/known_hosts" = sane-lib.fs.wantedText known-hosts-text;
+
+  users.users.colin.openssh.authorizedKeys.keys =
+  let
+    user-keys = filter (k: k.user == "colin") (attrValues config.sane.ssh.pubkeys);
+  in
+    map (k: k.asUserKey) user-keys;
+}

hosts/common/home/sublime-music.nix

@@ -0,0 +1,12 @@
+{ config, lib, sane-lib, ... }:
+
+lib.mkIf config.sane.home-manager.enable
+{
+  # TODO: this should only be shipped on gui platforms
+  sops.secrets."sublime_music_config" = {
+    owner = config.users.users.colin.name;
+    sopsFile = ../../../secrets/universal/sublime_music_config.json.bin;
+    format = "binary";
+  };
+  sane.fs."/home/colin/.config/sublime-music/config.json" = sane-lib.fs.wantedSymlinkTo config.sops.secrets.sublime_music_config.path;
+}

hosts/common/home/vlc.nix

@@ -0,0 +1,21 @@
+{ config, lib, sane-lib, ... }:
+
+let
+  feeds = sane-lib.feeds;
+  all-feeds = config.sane.feeds;
+  wanted-feeds = feeds.filterByFormat ["podcast"] all-feeds;
+  podcast-urls = lib.concatStringsSep "|" (
+    builtins.map (feed: feed.url) wanted-feeds
+  );
+in
+lib.mkIf config.sane.home-manager.enable
+{
+  sane.fs."/home/colin/.config/vlc/vlcrc" = sane-lib.fs.wantedText ''
+    [podcast]
+    podcast-urls=${podcast-urls}
+    [core]
+    metadata-network-access=0
+    [qt]
+    qt-privacy-ask=0
+  '';
+}

hosts/common/home/xdg-dirs.nix

@@ -0,0 +1,21 @@
+{ config, lib, sane-lib, ...}:
+
+lib.mkIf config.sane.home-manager.enable
+{
+  # XDG defines things like ~/Desktop, ~/Downloads, etc.
+  # these clutter the home, so i mostly don't use them.
+  sane.fs."/home/colin/.config/user-dirs.dirs" = sane-lib.fs.wantedText ''
+    XDG_DESKTOP_DIR="$HOME/.xdg/Desktop"
+    XDG_DOCUMENTS_DIR="$HOME/dev"
+    XDG_DOWNLOAD_DIR="$HOME/tmp"
+    XDG_MUSIC_DIR="$HOME/Music"
+    XDG_PICTURES_DIR="$HOME/Pictures"
+    XDG_PUBLICSHARE_DIR="$HOME/.xdg/Public"
+    XDG_TEMPLATES_DIR="$HOME/.xdg/Templates"
+    XDG_VIDEOS_DIR="$HOME/Videos"
+  '';
+
+  # prevent `xdg-user-dirs-update` from overriding/updating our config
+  # see <https://manpages.ubuntu.com/manpages/bionic/man5/user-dirs.conf.5.html>
+  sane.fs."/home/colin/.config/user-dirs.conf" = sane-lib.fs.wantedText "enabled=False";
+}

hosts/common/home/zsh/default.nix

@@ -0,0 +1,141 @@
+{ config, lib, pkgs, sane-lib, ... }:
+
+let
+  # powerlevel10k prompt config
+  # p10k.zsh is the auto-generated config, and i overwrite those defaults here, below.
+  p10k-overrides = ''
+    # powerlevel10k launches a gitstatusd daemon to accelerate git prompt queries.
+    # this keeps open file handles for any git repo i touch for 60 minutes (by default).
+    # that prevents unmounting whatever device the git repo is on -- particularly problematic for ~/private.
+    # i can disable gitstatusd and get slower fallback git queries:
+    # - either universally
+    # - or selectively by path
+    # see: <https://github.com/romkatv/powerlevel10k/issues/246>
+    typeset -g POWERLEVEL9K_VCS_DISABLED_DIR_PATTERN='(/home/colin/private/*|/home/colin/knowledge/*)'
+    # typeset -g POWERLEVEL9K_DISABLE_GITSTATUS=true
+
+    # show user@host also when logged into the current machine.
+    # default behavior is to show it only over ssh.
+    typeset -g POWERLEVEL9K_CONTEXT_{DEFAULT,SUDO}_CONTENT_EXPANSION='$P9K_CONTENT'
+  '';
+
+  prezto-init = ''
+    source ${pkgs.zsh-autosuggestions}/share/zsh-autosuggestions/zsh-autosuggestions.zsh
+    source ${pkgs.zsh-syntax-highlighting}/share/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh
+    source ${pkgs.zsh-prezto}/share/zsh-prezto/init.zsh
+  '';
+in
+lib.mkIf config.sane.home-manager.enable
+{
+  sane.persist.home.plaintext = [
+    # we don't need to full zsh dir -- just the history file --
+    # but zsh will sometimes backup the history file and we get fewer errors if we do proper mounts instead of symlinks.
+    # TODO: should be private?
+    ".local/share/zsh"
+    # cache gitstatus otherwise p10k fetched it from the net EVERY BOOT
+    ".cache/gitstatus"
+  ];
+
+  # zsh/prezto complains if zshrc doesn't exist; but it does allow an "empty" file.
+  sane.fs."/home/colin/.config/zsh/.zshrc" = sane-lib.fs.wantedText "# ";
+
+  programs.zsh = {
+    enable = true;
+    histFile = "$HOME/.local/share/zsh/history";
+    shellAliases = {
+      ":q" = "exit";
+      # common typos
+      "cd.." = "cd ..";
+      "cd../" = "cd ../";
+    };
+    setOptions = [
+      # defaults:
+      "HIST_IGNORE_DUPS"
+      "SHARE_HISTORY"
+      "HIST_FCNTL_LOCK"
+      # disable `rm *` confirmations
+      "rmstarsilent"
+    ];
+
+    # .zshenv config:
+    shellInit = ''
+      ZDOTDIR=$HOME/.config/zsh
+    '';
+
+    # .zshrc config:
+    interactiveShellInit =
+      (builtins.readFile ./p10k.zsh)
+    + p10k-overrides
+    + prezto-init
+    + ''
+      # zmv is a way to do rich moves/renames, with pattern matching/substitution.
+      # see for an example: <https://filipe.kiss.ink/zmv-zsh-rename/>
+      autoload -Uz zmv
+
+      HISTORY_IGNORE='(sane-shutdown *|sane-reboot *|rm *)'
+
+      # extra aliases
+      # TODO: move to `shellAliases` config?
+      function nd() {
+        mkdir -p "$1";
+        pushd "$1";
+      }
+
+      # auto-cd into any of these dirs by typing them and pressing 'enter':
+      hash -d 3rd="/home/colin/dev/3rd"
+      hash -d dev="/home/colin/dev"
+      hash -d knowledge="/home/colin/knowledge"
+      hash -d nixos="/home/colin/nixos"
+      hash -d nixpkgs="/home/colin/dev/3rd/nixpkgs"
+      hash -d ref="/home/colin/ref"
+      hash -d secrets="/home/colin/knowledge/secrets"
+      hash -d tmp="/home/colin/tmp"
+      hash -d uninsane="/home/colin/dev/uninsane"
+      hash -d Videos="/home/colin/Videos"
+    '';
+
+    syntaxHighlighting.enable = true;
+    vteIntegration = true;
+  };
+
+  # enable a command-not-found hook to show nix packages that might provide the binary typed.
+  programs.nix-index.enable = true;
+  programs.command-not-found.enable = false;  #< mutually exclusive with nix-index
+
+  # prezto = oh-my-zsh fork; controls prompt, auto-completion, etc.
+  # see: https://github.com/sorin-ionescu/prezto
+  # i believe this file is auto-sourced by the prezto init.zsh script.
+  sane.fs."/home/colin/.config/zsh/.zpreztorc" = sane-lib.fs.wantedText ''
+    zstyle ':prezto:*:*' color 'yes'
+
+    # modules (they ship with prezto):
+    # ENVIRONMENT: configures jobs to persist after shell exit; other basic niceties
+    # TERMINAL: auto-titles terminal (e.g. based on cwd)
+    # EDITOR: configures shortcuts like Ctrl+U=undo, Ctrl+L=clear
+    # HISTORY: `history-stat` alias, setopts for good history defaults
+    # DIRECTORY: sets AUTO_CD, adds `d` alias to list directory stack, and `1`-`9` to cd that far back the stack
+    # SPECTRUM: helpers for term colors and styling. used by prompts? might be unnecessary
+    # UTILITY: configures aliases like `ll`, `la`, disables globbing for things like rsync
+    #   adds aliases like `get` to fetch a file. also adds `http-serve` alias??
+    # COMPLETION: tab completion. requires `utility` module prior to loading
+    # TODO: enable AUTO_PARAM_SLASH
+    zstyle ':prezto:load' pmodule \
+      'environment' \
+      'terminal' \
+      'editor' \
+      'history' \
+      'directory' \
+      'spectrum' \
+      'utility' \
+      'completion' \
+      'prompt'
+
+    # default keymap. try also `vicmd` (vim normal mode, AKA "cmd mode") or `vi`.
+    zstyle ':prezto:module:editor' key-bindings 'emacs'
+
+    zstyle ':prezto:module:prompt' theme 'powerlevel10k'
+
+    # disable `mv` confirmation (and `rm`, too, unfortunately)
+    zstyle ':prezto:module:utility' safe-ops 'no'
+  '';
+}

hosts/common/i2p.nix

@@ -0,0 +1,4 @@
+{ ... }:
+{
+  # services.i2p.enable = true;
+}

hosts/common/ids.nix

@@ -0,0 +1,66 @@
+{ ... }:
+
+{
+  # legacy servo users, some are inconvenient to migrate
+  sane.ids.dhcpcd.gid = 991;
+  sane.ids.dhcpcd.uid = 992;
+  sane.ids.gitea.gid = 993;
+  sane.ids.git.uid = 994;
+  sane.ids.jellyfin.gid = 994;
+  sane.ids.pleroma.gid = 995;
+  sane.ids.jellyfin.uid = 996;
+  sane.ids.acme.gid = 996;
+  sane.ids.pleroma.uid = 997;
+  sane.ids.acme.uid = 998;
+
+  # greetd (used by sway)
+  sane.ids.greeter.uid = 999;
+  sane.ids.greeter.gid = 999;
+
+  # new servo users
+  sane.ids.freshrss.uid = 2401;
+  sane.ids.freshrss.gid = 2401;
+  sane.ids.mediawiki.uid = 2402;
+  sane.ids.signald.uid = 2403;
+  sane.ids.signald.gid = 2403;
+  sane.ids.mautrix-signal.uid = 2404;
+  sane.ids.mautrix-signal.gid = 2404;
+  sane.ids.navidrome.uid = 2405;
+  sane.ids.navidrome.gid = 2405;
+
+  sane.ids.colin.uid = 1000;
+  sane.ids.guest.uid = 1100;
+
+  # found on all hosts
+  sane.ids.sshd.uid = 2001;  # 997
+  sane.ids.sshd.gid = 2001;  # 997
+  sane.ids.polkituser.gid = 2002;  # 998
+  sane.ids.systemd-coredump.gid = 2003;  # 996
+  sane.ids.nscd.uid = 2004;
+  sane.ids.nscd.gid = 2004;
+  sane.ids.systemd-oom.uid = 2005;
+  sane.ids.systemd-oom.gid = 2005;
+
+  # found on graphical hosts
+  sane.ids.nm-iodine.uid = 2101;  # desko/moby/lappy
+
+  # found on desko host
+  # from services.usbmuxd
+  sane.ids.usbmux.uid = 2204;
+  sane.ids.usbmux.gid = 2204;
+
+
+  # originally found on moby host
+  # gnome core-shell
+  sane.ids.avahi.uid = 2304;
+  sane.ids.avahi.gid = 2304;
+  sane.ids.colord.uid = 2305;
+  sane.ids.colord.gid = 2305;
+  sane.ids.geoclue.uid = 2306;
+  sane.ids.geoclue.gid = 2306;
+  # gnome core-os-services
+  sane.ids.rtkit.uid = 2307;
+  sane.ids.rtkit.gid = 2307;
+  # phosh
+  sane.ids.feedbackd.gid = 2308;
+}

hosts/common/machine-id.nix

@@ -0,0 +1,16 @@
+{ ... }:
+{
+  # /etc/machine-id is a globally unique identifier used for:
+  # - systemd-networkd: DHCP lease renewal (instead of keying by the MAC address)
+  # - systemd-journald: to filter logs by host
+  # - chromium (potentially to track re-installations)
+  # - gdbus; system services that might upgrade to AF_LOCAL if both services can confirm they're on the same machine
+  # because of e.g. the chromium use, we *don't want* to persist this.
+  # however, `journalctl` won't show logs from previous boots unless the machine-ids match.
+  # so for now, generate something unique from the host ssh key.
+  # TODO: move this into modules?
+  system.activationScripts.machine-id = {
+    deps = [ "etc" ];
+    text = "sha256sum /etc/ssh/host_keys/ssh_host_ed25519_key | cut -c 1-32 > /etc/machine-id";
+  };
+}

hosts/common/net.nix

@@ -0,0 +1,23 @@
+{ config, lib, pkgs, ... }:
+
+{
+  # the default backend is "wpa_supplicant".
+  # wpa_supplicant reliably picks weak APs to connect to.
+  # see: <https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/issues/474>
+  # iwd is an alternative that shouldn't have this problem
+  # docs:
+  # - <https://nixos.wiki/wiki/Iwd>
+  # - <https://iwd.wiki.kernel.org/networkmanager>
+  # - `man iwd.config`  for global config
+  # - `man iwd.network` for per-SSID config
+  # use `iwctl` to control
+  networking.networkmanager.wifi.backend = "iwd";
+  networking.wireless.iwd.enable = true;
+  networking.wireless.iwd.settings = {
+    # auto-connect to a stronger network if signal drops below this value
+    # bedroom -> bedroom connection is -35 to -40 dBm
+    # bedroom -> living room connection is -60 dBm
+    General.RoamThreshold = "-52";  # default -70
+    General.RoamThreshold5G = "-52";  # default -76
+  };
+}

hosts/common/secrets.nix

@@ -0,0 +1,124 @@
+{ config, ... }:
+
+{
+  # SOPS configuration:
+  #   docs: https://github.com/Mic92/sops-nix
+  #
+  # for each new user you want to edit sops files:
+  # create a private age key from ssh key:
+  #   $ mkdir -p ~/.config/sops/age; ssh-to-age -private-key -i ~/.ssh/id_ed25519 > ~/.config/sops/age/keys.txt; chmod 600 ~/.config/sops/age/keys.txt
+  #   if the private key was password protected, then first decrypt it:
+  #     $ cp ~/.ssh/id_ed25519 /tmp/id_ed25519
+  #     $ ssh-keygen -p -N "" -f /tmp/id_ed25519
+  #
+  # for each user you want to decrypt secrets:
+  #   $ cat ~/.ssh/id_ed25519.pub | ssh-to-age
+  #   add the result to .sops.yaml
+  #   since we specify ssh pubkeys in the nix config, you can just grep for `ssh-ed25519` here and use those instead
+  #
+  # for each host you want to decrypt secrets:
+  #   $ cat /etc/ssh/ssh_host_ed25519_key.pub | ssh-to-age
+  #   add the result to .sops.yaml
+  #   $ sops updatekeys secrets/example.yaml
+  #
+  # to create a new secret:
+  #   $ sops secrets/example.yaml
+  #   control access below (sops.secret.<x>.owner = ...)
+  #
+  # to read a secret:
+  #   $ cat /run/secrets/example_key
+
+  # sops.age.sshKeyPaths = [ "/home/colin/.ssh/id_ed25519_dec" ];
+  # This will add secrets.yaml to the nix store
+  # You can avoid this by adding a string to the full path instead, i.e.
+  # sops.defaultSopsFile = "/root/.sops/secrets/example.yaml";
+  sops.defaultSopsFile = ../../secrets/universal.yaml;
+  sops.gnupg.sshKeyPaths = [];  # disable RSA key import
+  # This is using an age key that is expected to already be in the filesystem
+  # sops.age.keyFile = "/home/colin/.ssh/age.pub";
+  # sops.age.keyFile = "/var/lib/sops-nix/key.txt";
+  # This will generate a new key if the key specified above does not exist
+  # sops.age.generateKey = true;
+  # This is the actual specification of the secrets.
+  # sops.secrets.example_key = {
+  #   owner = config.users.users.colin.name;
+  # };
+  # sops.secrets."myservice/my_subdir/my_secret" = {};
+
+  ## universal secrets
+  # TODO: glob these?
+
+  sops.secrets."jackett_apikey" = {
+    sopsFile = ../../secrets/universal.yaml;
+    owner = config.users.users.colin.name;
+  };
+  sops.secrets."router_passwd" = {
+    sopsFile = ../../secrets/universal.yaml;
+  };
+  sops.secrets."wg_ovpnd_us_privkey" = {
+    sopsFile = ../../secrets/universal.yaml;
+  };
+  sops.secrets."wg_ovpnd_us-atl_privkey" = {
+    sopsFile = ../../secrets/universal.yaml;
+  };
+  sops.secrets."wg_ovpnd_us-mi_privkey" = {
+    sopsFile = ../../secrets/universal.yaml;
+  };
+  sops.secrets."wg_ovpnd_ukr_privkey" = {
+    sopsFile = ../../secrets/universal.yaml;
+  };
+
+  sops.secrets."snippets" = {
+    sopsFile = ../../secrets/universal/snippets.bin;
+    format = "binary";
+    owner = config.users.users.colin.name;
+  };
+
+  sops.secrets."bt/car" = {
+    sopsFile = ../../secrets/universal/bt/car.bin;
+    format = "binary";
+  };
+  sops.secrets."bt/earbuds" = {
+    sopsFile = ../../secrets/universal/bt/earbuds.bin;
+    format = "binary";
+  };
+  sops.secrets."bt/portable-speaker" = {
+    sopsFile = ../../secrets/universal/bt/portable-speaker.bin;
+    format = "binary";
+  };
+
+  sops.secrets."iwd/community-university.psk" = {
+    sopsFile = ../../secrets/universal/net/community-university.psk.bin;
+    format = "binary";
+  };
+  sops.secrets."iwd/friend-libertarian-dod.psk" = {
+    sopsFile = ../../secrets/universal/net/friend-libertarian-dod.psk.bin;
+    format = "binary";
+  };
+  sops.secrets."iwd/friend-rationalist-empathist.psk" = {
+    sopsFile = ../../secrets/universal/net/friend-rationalist-empathist.psk.bin;
+    format = "binary";
+  };
+  sops.secrets."iwd/home-bedroom.psk" = {
+    sopsFile = ../../secrets/universal/net/home-bedroom.psk.bin;
+    format = "binary";
+  };
+  sops.secrets."iwd/home-shared-24G.psk" = {
+    sopsFile = ../../secrets/universal/net/home-shared-24G.psk.bin;
+    format = "binary";
+  };
+  sops.secrets."iwd/home-shared.psk" = {
+    sopsFile = ../../secrets/universal/net/home-shared.psk.bin;
+    format = "binary";
+  };
+  sops.secrets."iwd/iphone" = {
+    sopsFile = ../../secrets/universal/net/iphone.psk.bin;
+    format = "binary";
+  };
+  sops.secrets."iwd/parents" = {
+    sopsFile = ../../secrets/universal/net/parents.psk.bin;
+    format = "binary";
+  };
+}
+
+

hosts/common/ssh.nix

@@ -0,0 +1,33 @@
+{ config, lib, sane-data, sane-lib, ... }:
+
+let
+  inherit (builtins) head map mapAttrs tail;
+  inherit (lib) concatStringsSep mkMerge reverseList;
+in
+{
+  sane.ssh.pubkeys =
+  let
+    # path is a DNS-style path like [ "org" "uninsane" "root" ]
+    keyNameForPath = path:
+      let
+        rev = reverseList path;
+        name = head rev;
+        host = concatStringsSep "." (tail rev);
+      in
+      "${name}@${host}";
+
+    # [{ path :: [String], value :: String }] for the keys we want to install
+    globalKeys = sane-lib.flattenAttrs sane-data.keys;
+    domainKeys = sane-lib.flattenAttrs (
+      mapAttrs (host: cfg: {
+        colin = cfg.ssh.user_pubkey;
+        root = cfg.ssh.host_pubkey;
+      }) config.sane.hosts.by-name
+    );
+  in mkMerge (map
+    ({ path, value }: {
+      "${keyNameForPath path}" = lib.mkIf (value != null) value;
+    })
+    (globalKeys ++ domainKeys)
+  );
+}

hosts/common/users.nix

@@ -0,0 +1,134 @@
+{ config, pkgs, lib, sane-lib, ... }:
+
+# installer docs: https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/profiles/installation-device.nix
+with lib;
+let
+  cfg = config.sane.users;
+  fs = sane-lib.fs;
+in
+{
+  options = {
+    sane.users.guest.enable = mkOption {
+      default = false;
+      type = types.bool;
+    };
+  };
+
+  config = {
+    # Users are exactly these specified here;
+    # old ones will be deleted (from /etc/passwd, etc) upon upgrade.
+    users.mutableUsers = false;
+
+    # docs: https://nixpkgs-manual-sphinx-markedown-example.netlify.app/generated/options-db.xml.html#users-users
+    users.users.colin = {
+      # sets group to "users" (?)
+      isNormalUser = true;
+      home = "/home/colin";
+      createHome = true;
+      homeMode = "0700";
+      # i don't get exactly what this is, but nixos defaults to this non-deterministically
+      # in /var/lib/nixos/auto-subuid-map and i don't want that.
+      subUidRanges = [
+        { startUid=100000; count=1; }
+      ];
+      group = "users";
+      extraGroups = [
+        "wheel"
+        "nixbuild"
+        "networkmanager"
+        # phosh/mobile. XXX colin: unsure if necessary
+        "video"
+        "feedbackd"
+        "dialout" # required for modem access
+      ];
+
+      # initial password is empty, in case anything goes wrong.
+      # if `colin-passwd` (a password hash) is successfully found/decrypted, that becomes the password at boot.
+      initialPassword = lib.mkDefault "";
+      passwordFile = lib.mkIf (config.sops.secrets ? "colin-passwd") config.sops.secrets.colin-passwd.path;
+
+      shell = pkgs.zsh;
+
+      # mount encrypted stuff at login
+      # some other nix pam users:
+      # - <https://github.com/g00pix/nixconf/blob/32c04f6fa843fed97639dd3f09e157668d3eea1f/profiles/sshfs.nix>
+      # - <https://github.com/lourkeur/distro/blob/11173454c6bb50f7ccab28cc2c757dca21446d1d/nixos/profiles/users/louis-full.nix>
+      # - <https://github.com/dnr/sample-nix-code/blob/03494480c1fae550c033aa54fd96aeb3827761c5/nixos/laptop.nix>
+      pamMount = let
+        priv = config.fileSystems."/home/colin/private";
+      in {
+        fstype = priv.fsType;
+        path = priv.device;
+        mountpoint = priv.mountPoint;
+        options = builtins.concatStringsSep "," priv.options;
+      };
+    };
+
+    security.pam.mount.enable = true;
+
+    # ensure ~ perms are known to sane.fs module.
+    # TODO: this is generic enough to be lifted up into sane.fs itself.
+    sane.fs."/home/colin".dir.acl = {
+      user = "colin";
+      group = config.users.users.colin.group;
+      mode = config.users.users.colin.homeMode;
+    };
+
+    sane.persist.home.plaintext = [
+      "archive"
+      "dev"
+      # TODO: records should be private
+      "records"
+      "ref"
+      "tmp"
+      "use"
+      "Music"
+      "Pictures"
+      "Videos"
+
+      ".cache/nix"
+      ".cache/nix-index"
+      ".cargo"
+      ".rustup"
+    ];
+
+    # convenience
+    sane.fs."/home/colin/knowledge" = fs.wantedSymlinkTo "/home/colin/private/knowledge";
+    sane.fs."/home/colin/nixos" = fs.wantedSymlinkTo "/home/colin/dev/nixos";
+    sane.fs."/home/colin/Videos/servo" = fs.wantedSymlinkTo "/mnt/servo-media/Videos";
+    sane.fs."/home/colin/Videos/servo-incomplete" = fs.wantedSymlinkTo "/mnt/servo-media/incomplete";
+    sane.fs."/home/colin/Music/servo" = fs.wantedSymlinkTo "/mnt/servo-media/Music";
+
+    # used by password managers, e.g. unix `pass`
+    sane.fs."/home/colin/.password-store" = fs.wantedSymlinkTo "/home/colin/knowledge/secrets/accounts";
+
+    sane.persist.sys.plaintext = mkIf cfg.guest.enable [
+      # intentionally allow other users to write to the guest folder
+      { directory = "/home/guest"; user = "guest"; group = "users"; mode = "0775"; }
+    ];
+    users.users.guest = mkIf cfg.guest.enable {
+      isNormalUser = true;
+      home = "/home/guest";
+      subUidRanges = [
+        { startUid=200000; count=1; }
+      ];
+      group = "users";
+      initialPassword = lib.mkDefault "";
+      shell = pkgs.zsh;
+      openssh.authorizedKeys.keys = [
+        # TODO: insert pubkeys that should be allowed in
+      ];
+    };
+
+    security.sudo = {
+      enable = true;
+      wheelNeedsPassword = false;
+    };
+
+    services.openssh = {
+      enable = true;
+      settings.PermitRootLogin = "no";
+      settings.PasswordAuthentication = false;
+    };
+  };
+}

hosts/common/vpn.nix

@@ -0,0 +1,66 @@
+{ config, lib, ... }:
+
+# to add a new OVPN VPN:
+# - generate a privkey `wg genkey`
+# - add this key to `sops secrets/universal.yaml`
+# - upload pubkey to OVPN.com
+# - generate config @ OVPN.com
+# - copy the Address, PublicKey, Endpoint from OVPN's config
+# N.B.: maximum interface name in Linux is 15 characters.
+let
+  def-ovpn = name: { endpoint, publicKey, address }: {
+    networking.wg-quick.interfaces."ovpnd-${name}" = {
+      inherit address;
+      privateKeyFile = config.sops.secrets."wg_ovpnd_${name}_privkey".path;
+      dns = [
+        "46.227.67.134"
+        "192.165.9.158"
+      ];
+      peers = [
+        {
+          allowedIPs = [
+            "0.0.0.0/0"
+            "::/0"
+          ];
+          inherit endpoint publicKey;
+        }
+      ];
+      # to start: `systemctl start wg-quick-ovpnd-${name}`
+      autostart = false;
+    };
+  };
+in lib.mkMerge [
+  (def-ovpn "us" {
+    endpoint = "vpn31.prd.losangeles.ovpn.com:9929";
+    publicKey = "VW6bEWMOlOneta1bf6YFE25N/oMGh1E1UFBCfyggd0k=";
+    address = [
+      "172.27.237.218/32"
+      "fd00:0000:1337:cafe:1111:1111:ab00:4c8f/128"
+    ];
+  })
+  # NB: us-* share the same wg key and link-local addrs, but distinct public addresses
+  (def-ovpn "us-atl" {
+    endpoint = "vpn18.prd.atlanta.ovpn.com:9929";
+    publicKey = "Dpg/4v5s9u0YbrXukfrMpkA+XQqKIFpf8ZFgyw0IkE0=";
+    address = [
+      "172.21.182.178/32"
+      "fd00:0000:1337:cafe:1111:1111:cfcb:27e3/128"
+    ];
+  })
+  (def-ovpn "us-mi" {
+    endpoint = "vpn34.prd.miami.ovpn.com:9929";
+    publicKey = "VtJz2irbu8mdkIQvzlsYhU+k9d55or9mx4A2a14t0V0=";
+    address = [
+      "172.21.182.178/32"
+      "fd00:0000:1337:cafe:1111:1111:cfcb:27e3/128"
+    ];
+  })
+  (def-ovpn "ukr" {
+    endpoint = "vpn96.prd.kyiv.ovpn.com:9929";
+    publicKey = "CjZcXDxaaKpW8b5As1EcNbI6+42A6BjWahwXDCwfVFg=";
+    address = [
+      "172.18.180.159/32"
+      "fd00:0000:1337:cafe:1111:1111:ec5c:add3/128"
+    ];
+  })
+]

hosts/instantiate.nix

@@ -0,0 +1,27 @@
+# trampoline from flake.nix into the specific host definition, while doing a tiny bit of common setup
+
+# args from flake-level `import`
+{ hostName, localSystem }:
+
+# module args
+{ config, ... }:
+
+{
+  imports = [
+    ./by-name/${hostName}
+    ./common
+    ./modules
+  ];
+
+  networking.hostName = hostName;
+
+  nixpkgs.overlays = [
+    (next: prev: {
+      # for local != target we by default just emulate the target while building.
+      # provide a `pkgs.cross.<pkg>` alias that consumers can use instead of `pkgs.<foo>`
+      # to explicitly opt into non-emulated cross compilation for any specific package.
+      # this is most beneficial for large packages with few pre-requisites -- like Linux.
+      cross = next.crossFrom."${localSystem}";
+    })
+  ];
+}

hosts/modules/default.nix

@@ -0,0 +1,12 @@
+{ ... }:
+
+{
+  imports = [
+    ./derived-secrets.nix
+    ./hardware
+    ./hostnames.nix
+    ./hosts.nix
+    ./roles
+    ./wg-home.nix
+  ];
+}

hosts/modules/derived-secrets.nix

@@ -0,0 +1,47 @@
+{ config, lib, ... }:
+
+let
+  inherit (builtins) toString;
+  inherit (lib) mapAttrs mkOption types;
+  cfg = config.sane.derived-secrets;
+  secret = types.submodule {
+    options = {
+      len = mkOption {
+        type = types.int;
+      };
+      encoding = mkOption {
+        type = types.enum [ "base64" ];
+      };
+    };
+  };
+in
+{
+  options = {
+    sane.derived-secrets = mkOption {
+      type = types.attrsOf secret;
+      default = {};
+      description = ''
+        fs path => secret options.
+        for each entry, we create an item at the given path whose value is deterministic,
+        but also pseudo-random and not predictable by anyone without root access to the machine.
+        as PRNG source we use the host ssh key, and derived secrets are salted based on the destination path.
+      '';
+    };
+  };
+
+  config = {
+    sane.fs = mapAttrs (path: c: {
+      generated.script.script = ''
+        echo "$1" | cat /dev/stdin /etc/ssh/host_keys/ssh_host_ed25519_key \
+          | sha512sum \
+          | cut -c 1-${toString (c.len * 2)} \
+          | tr a-z A-Z \
+          | basenc -d --base16 \
+          | basenc --${c.encoding} \
+          > "$1"
+      '';
+      generated.script.scriptArgs = [ path ];
+      generated.acl.mode = "0600";
+    }) cfg;
+  };
+}

hosts/modules/hardware/default.nix

@@ -0,0 +1,7 @@
+{ ... }:
+
+{
+  imports = [
+    ./x86_64.nix
+  ];
+}

hosts/modules/hardware/x86_64.nix

@@ -0,0 +1,25 @@
+{ lib, pkgs, ... }:
+
+{
+  config = lib.mkIf (pkgs.system == "x86_64-linux") {
+    boot.initrd.availableKernelModules = [
+      "xhci_pci" "ahci" "sd_mod" "sdhci_pci"  # nixos-generate-config defaults
+      "usb_storage"   # rpi needed this to boot from usb storage, i think.
+      "nvme"  # to boot from nvme devices
+      # efi_pstore evivars
+    ];
+
+    # enable cross compilation
+    boot.binfmt.emulatedSystems = [ "aarch64-linux" ];
+    # nixpkgs.config.allowUnsupportedSystem = true;
+    # nixpkgs.crossSystem.system = "aarch64-linux";
+
+    powerManagement.cpuFreqGovernor = "powersave";
+    hardware.cpu.amd.updateMicrocode = true;    # desktop
+    hardware.cpu.intel.updateMicrocode = true;  # laptop
+
+    hardware.opengl.driSupport = true;
+    # For 32 bit applications
+    hardware.opengl.driSupport32Bit = true;
+  };
+}