modules/programs: sandbox: remove no-longer-needed /run/systemd/resolve from sandbox

mostly just pruning unused features

README.md

@@ -22,7 +22,7 @@ you might specifically be interested in these files (elaborated further in #key-
 - my way of deploying dotfiles/configuring programs per-user:
   - [modules/fs/](./modules/fs/default.nix)
   - [modules/programs/](./modules/programs/default.nix)
-  - [modules/users.nix](./modules/users.nix)
+  - [modules/users/](./modules/users/default.nix)
 
 [nixpkgs]: https://github.com/NixOS/nixpkgs
 [sops]: https://github.com/Mic92/sops-nix
@@ -109,9 +109,10 @@ i.e. you might find value in using these in your own config:
     - `sane.programs.firefox.sandbox.whitelistWayland = true;  # allow it to render a wayland window`
     - `sane.programs.firefox.sandbox.extraHomePaths = [ "Downloads" ];  # allow it read/write access to ~/Downloads`
     - integrated with `fs` and `persist` modules so that programs' config files and persisted data stores are linked into the sandbox w/o any extra involvement.
-- `modules/users.nix`
+- `modules/users/`
   - convenience layer atop the above modules so that you can just write
     `fs.".config/git"` instead of `fs."/home/colin/.config/git"`
+  - per-user services managed by [s6-rc](https://www.skarnet.org/software/s6-rc/)
 
 some things in here could easily find broader use. if you would find benefit in
 them being factored out of my config, message me and we could work to make that happen.

TODO.md

@@ -1,9 +1,25 @@
 ## BUGS
+- moby: my mobile ISP is adding spoofed AAAA records that break things like wireguard
+  - it only does this when i use their DNS resolvers though: if i run my own recursive resolver, they won't mess with it.
+- moby: mpv uosc always starts at 40% volume
+  - is this just mpv remembering its last-played volume?
+- moby: rofi crashes sporadically
+- mpv: no way to exit fullscreen video on moby
+  - uosc hides controls on FS, and touch doesn't support unhiding
+- i accidentally create sub-splits in sway all the time
+  - especially on moby => unusable
+  - like toplevel is split L/R, and then the L is a tabbed view and the R is a tabbed view
+- Signal restart loop drains battery
+  - decrease s6 restart time?
+- `ssh` access doesn't grant same linux capabilities as login
 - ringer (i.e. dino incoming call) doesn't prevent moby from sleeping
+- sway mouse/kb hotplug doesn't work
 - `nix` operations from lappy hang when `desko` is unreachable
   - could at least direct the cache to `http://desko-hn:5001`
+- sysvol (volume overlay): when casting with `blast`, sysvol doesn't react to volume changes
 
 ## REFACTORING:
+- REMOVE DEPRECATED `crypt` from sftpgo_auth_hook
 - consolidate ~/dev and ~/ref
   - ~/dev becomes a link to ~/ref/cat/mine
 - fold hosts/common/home/ssh.nix -> hosts/common/users/colin.nix
@@ -28,6 +44,7 @@
 
 ## IMPROVEMENTS:
 ### security/resilience
+- add FTPS support for WAN users of uninsane.org (and possibly require it?)
 - validate duplicity backups!
 - encrypt more ~ dirs (~/archives, ~/records, ..?)
   - best to do this after i know for sure i have good backups
@@ -55,6 +72,8 @@
   - integrate `nix check` into Gitea actions?
 
 ### user experience
+- rofi: sort items case-insensitively
+- give `mpv` better `nice`ness?
 - xdg-desktop-portal shouldn't kill children on exit
   - *maybe* a job for `setsid -f`?
 - replace starship prompt with something more efficient
@@ -79,6 +98,8 @@
   - numberlink (generic name for Flow Free). not packaged in Nix
   - Neverball (https://neverball.org/screenshots.php). nix: as `neverball`
   - blurble (https://linuxphoneapps.org/games/app.drey.blurble/). nix: not as of 2024-02-05
+  - Trivia Quiz (https://linuxphoneapps.org/games/io.github.nokse22.trivia-quiz/)
+- sane-sync-music: remove empty dirs
 
 #### moby
 - fix cpuidle (gets better power consumption): <https://xnux.eu/log/077.html>

flake.lock

@@ -24,11 +24,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1701473968,
-        "narHash": "sha256-YcVE5emp1qQ8ieHUnxt1wCZCC3ZfAS+SRRWZ2TMda7E=",
+        "lastModified": 1712014858,
+        "narHash": "sha256-sB4SWl2lX95bExY2gMFG5HIzvva5AVMJd4Igm+GpZNw=",
         "owner": "hercules-ci",
         "repo": "flake-parts",
-        "rev": "34fed993f1674c8d06d58b37ce1e0fe5eebcb9f5",
+        "rev": "9126214d0a59633752a136528f5f3b9aa8565b7d",
         "type": "github"
       },
       "original": {
@@ -61,11 +61,11 @@
         "nixpkgs-lib": "nixpkgs-lib"
       },
       "locked": {
-        "lastModified": 1710184940,
-        "narHash": "sha256-FzYm4td3FJfzOAuEkCXt3KdUgZuA072OAQXqIq+IAMo=",
+        "lastModified": 1715515815,
+        "narHash": "sha256-yaLScMHNFCH6SbB0HSA/8DWDgK0PyOhCXoFTdHlWkhk=",
         "owner": "nix-community",
         "repo": "lib-aggregate",
-        "rev": "45b75bf534592c0c1c881a1c447f7fdb37a87eaf",
+        "rev": "09883ca828e8cfaacdb09e29190a7b84ad1d9925",
         "type": "github"
       },
       "original": {
@@ -99,11 +99,11 @@
         "treefmt-nix": "treefmt-nix"
       },
       "locked": {
-        "lastModified": 1705242886,
-        "narHash": "sha256-TLj334vRwFtSym3m+NnKcNCnKKPNoTC/TDZL40vmOso=",
+        "lastModified": 1715248291,
+        "narHash": "sha256-npC9Swu4VIlRIiEP0XFGoIukd6vOufS/M3PdHk6rQpc=",
         "owner": "nix-community",
         "repo": "nix-eval-jobs",
-        "rev": "6b03a93296faf174b97546fd573c8b379f523a8d",
+        "rev": "63154bdfb22091041b307d17863bdc0e01a32a00",
         "type": "github"
       },
       "original": {
@@ -121,11 +121,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1701208414,
-        "narHash": "sha256-xrQ0FyhwTZK6BwKhahIkUVZhMNk21IEI1nUcWSONtpo=",
+        "lastModified": 1703863825,
+        "narHash": "sha256-rXwqjtwiGKJheXB43ybM8NwWB8rO2dSRrEqes0S7F5Y=",
         "owner": "nix-community",
         "repo": "nix-github-actions",
-        "rev": "93e39cc1a087d65bcf7a132e75a650c44dd2b734",
+        "rev": "5163432afc817cf8bd1f031418d1869e4c9d5547",
         "type": "github"
       },
       "original": {
@@ -136,11 +136,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1703134684,
-        "narHash": "sha256-SQmng1EnBFLzS7WSRyPM9HgmZP2kLJcPAz+Ug/nug6o=",
+        "lastModified": 1715037484,
+        "narHash": "sha256-OUt8xQFmBU96Hmm4T9tOWTu4oCswCzoVl+pxSq/kiFc=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "d6863cbcbbb80e71cecfc03356db1cda38919523",
+        "rev": "ad7efee13e0d216bf29992311536fce1d3eefbef",
         "type": "github"
       },
       "original": {
@@ -152,11 +152,11 @@
     },
     "nixpkgs-lib": {
       "locked": {
-        "lastModified": 1710031547,
-        "narHash": "sha256-pkUg3hOKuGWMGF9WEMPPN/G4pqqdbNGJQ54yhyQYDVY=",
+        "lastModified": 1715474941,
+        "narHash": "sha256-CNCqCGOHdxuiVnVkhTpp2WcqSSmSfeQjubhDOcgwGjU=",
         "owner": "nix-community",
         "repo": "nixpkgs.lib",
-        "rev": "630ebdc047ca96d8126e16bb664c7730dc52f6e6",
+        "rev": "58e03b95f65dfdca21979a081aa62db0eed6b1d8",
         "type": "github"
       },
       "original": {
@@ -167,11 +167,11 @@
     },
     "nixpkgs-next-unpatched": {
       "locked": {
-        "lastModified": 1710337169,
-        "narHash": "sha256-u2/74bhQuWykUZDWUIhHd6IpZiaQ0hSpTBbx0y9opkE=",
+        "lastModified": 1715601680,
+        "narHash": "sha256-Gmz6U8NMZVVnP6AGX4sMl4X6RcQBASPl/2Gj9R5k1Pk=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "4ee0840ba2ecc50458ab1677d108afcd691f4815",
+        "rev": "eda36d7cf3391ad06097009b08822fb74acd5e00",
         "type": "github"
       },
       "original": {
@@ -183,11 +183,11 @@
     },
     "nixpkgs-stable": {
       "locked": {
-        "lastModified": 1710033658,
-        "narHash": "sha256-yiZiVKP5Ya813iYLho2+CcFuuHpaqKc/CoxOlANKcqM=",
+        "lastModified": 1715458492,
+        "narHash": "sha256-q0OFeZqKQaik2U8wwGDsELEkgoZMK7gvfF6tTXkpsqE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "b17375d3bb7c79ffc52f3538028b2ec06eb79ef8",
+        "rev": "8e47858badee5594292921c2668c11004c3b0142",
         "type": "github"
       },
       "original": {
@@ -199,11 +199,11 @@
     },
     "nixpkgs-unpatched": {
       "locked": {
-        "lastModified": 1710339354,
-        "narHash": "sha256-+P5ccUPiLouHexb8aJrUOVOIja9qm+fG57pgAu7uIRs=",
+        "lastModified": 1715616096,
+        "narHash": "sha256-rxh2XECb5hRzgNR4Xqj3aAjg6821LmNTVRfF6sUW6fI=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "2dbc8f62d8af7a1ab962e4b20d12b25ddcb86ced",
+        "rev": "0a949cf2618e8eab83aa008f1f8e03db137ed36c",
         "type": "github"
       },
       "original": {
@@ -223,11 +223,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1710317949,
-        "narHash": "sha256-bwReMiWPA2wYBvKEMhO8pJcu+o+7ocy5hGkSoawTHu0=",
+        "lastModified": 1715609745,
+        "narHash": "sha256-z2lQ7G1AxljvYeqrHWjc1ctOI4QZP06vPtvLYJWfZSc=",
         "owner": "nix-community",
         "repo": "nixpkgs-wayland",
-        "rev": "771cb198c281db6918829651f194bf4db32e342d",
+        "rev": "ed18785b8816fa878bdd9df7f2e8722695401ef8",
         "type": "github"
       },
       "original": {
@@ -254,11 +254,11 @@
         "nixpkgs-stable": "nixpkgs-stable"
       },
       "locked": {
-        "lastModified": 1710195194,
-        "narHash": "sha256-KFxCJp0T6TJOz1IOKlpRdpsCr9xsvlVuWY/VCiAFnTE=",
+        "lastModified": 1715482972,
+        "narHash": "sha256-y1uMzXNlrVOWYj1YNcsGYLm4TOC2aJrwoUY1NjQs9fM=",
         "owner": "Mic92",
         "repo": "sops-nix",
-        "rev": "e52d8117b330f690382f1d16d81ae43daeb4b880",
+        "rev": "b6cb5de2ce57acb10ecdaaf9bbd62a5ff24fa02e",
         "type": "github"
       },
       "original": {
@@ -291,11 +291,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1702979157,
-        "narHash": "sha256-RnFBbLbpqtn4AoJGXKevQMCGhra4h6G2MPcuTSZZQ+g=",
+        "lastModified": 1711963903,
+        "narHash": "sha256-N3QDhoaX+paWXHbEXZapqd1r95mdshxToGowtjtYkGI=",
         "owner": "numtide",
         "repo": "treefmt-nix",
-        "rev": "2961375283668d867e64129c22af532de8e77734",
+        "rev": "49dc4a92b02b8e68798abd99184f228243b6e3ac",
         "type": "github"
       },
       "original": {
@@ -311,11 +311,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1707981105,
-        "narHash": "sha256-YCU1eNslBHabjP+OCY+BxPycEFO9SRUts10MrN9QORE=",
+        "lastModified": 1713198740,
+        "narHash": "sha256-8SUaqMJdAkMOI9zhvlToL7eCr5Sl+2o2pDQ7nq+HoJU=",
         "ref": "refs/heads/master",
-        "rev": "bb10cd8853d05191e4d62947d93687c462e92c30",
-        "revCount": 235,
+        "rev": "af8420d1c256d990b5e24de14ad8592a5d85bf77",
+        "revCount": 239,
         "type": "git",
         "url": "https://git.uninsane.org/colin/uninsane"
       },

flake.nix

@@ -108,7 +108,7 @@
       nixpkgs' = patchNixpkgs "master" nixpkgs-unpatched;
       nixpkgsCompiledBy = system: nixpkgs'.legacyPackages."${system}";
 
-      evalHost = { name, local, target, light ? false, nixpkgs ? nixpkgs' }: nixpkgs.lib.nixosSystem {
+      evalHost = { name, local, target, variant ? null, nixpkgs ? nixpkgs' }: nixpkgs.lib.nixosSystem {
         system = target;
         modules = [
           {
@@ -120,8 +120,11 @@
             # so avoid specifying hostPlatform.system on non-cross builds, so i can use upstream caches.
             nixpkgs.hostPlatform.system = target;
           })
-          (optionalAttrs light {
-            sane.enableSlowPrograms = false;
+          (optionalAttrs (variant == "light") {
+            sane.maxBuildCost = 2;
+          })
+          (optionalAttrs (variant == "min") {
+            sane.maxBuildCost = 0;
           })
           (import ./hosts/instantiate.nix { hostName = name; })
           self.nixosModules.default
@@ -139,11 +142,13 @@
         hosts = {
           servo       = { name = "servo";  local = "x86_64-linux"; target = "x86_64-linux";  };
           desko       = { name = "desko";  local = "x86_64-linux"; target = "x86_64-linux";  };
-          desko-light = { name = "desko";  local = "x86_64-linux"; target = "x86_64-linux";  light = true; };
+          desko-light = { name = "desko";  local = "x86_64-linux"; target = "x86_64-linux";  variant = "light"; };
           lappy       = { name = "lappy";  local = "x86_64-linux"; target = "x86_64-linux";  };
-          lappy-light = { name = "lappy";  local = "x86_64-linux"; target = "x86_64-linux";  light = true; };
+          lappy-light = { name = "lappy";  local = "x86_64-linux"; target = "x86_64-linux";  variant = "light"; };
+          lappy-min =   { name = "lappy";  local = "x86_64-linux"; target = "x86_64-linux";  variant = "min"; };
           moby        = { name = "moby";   local = "x86_64-linux"; target = "aarch64-linux"; };
-          moby-light  = { name = "moby";   local = "x86_64-linux"; target = "aarch64-linux"; light = true; };
+          moby-light  = { name = "moby";   local = "x86_64-linux"; target = "aarch64-linux"; variant = "light"; };
+          moby-min  =   { name = "moby";   local = "x86_64-linux"; target = "aarch64-linux"; variant = "min"; };
           rescue      = { name = "rescue"; local = "x86_64-linux"; target = "x86_64-linux";  };
         };
         hostsNext = mapAttrs' (h: v: {
@@ -408,14 +413,17 @@
             desko-light = deployApp "desko-light" "desko" "switch";
             lappy       = deployApp "lappy"       "lappy" "switch";
             lappy-light = deployApp "lappy-light" "lappy" "switch";
+            lappy-min   = deployApp "lappy-min"   "lappy" "switch";
             moby        = deployApp "moby"        "moby"  "switch";
             moby-light  = deployApp "moby-light"  "moby"  "switch";
+            moby-min  =   deployApp "moby-min"    "moby"  "switch";
             moby-test   = deployApp "moby"        "moby"  "test";
             servo       = deployApp "servo"       "servo" "switch";
 
             # like `nixos-rebuild --flake . switch`
-            self        = deployApp "$(hostname)"       ""      "switch";
-            self-light  = deployApp "$(hostname)-light" ""      "switch";
+            self        = deployApp "$(hostname)"       "" "switch";
+            self-light  = deployApp "$(hostname)-light" "" "switch";
+            self-min    = deployApp "$(hostname)-min"   "" "switch";
 
             type = "app";
             program = builtins.toString (pkgs.writeShellScript "deploy-all" ''
@@ -431,12 +439,16 @@
             desko-light = deployApp "desko-light" "desko" null;
             lappy       = deployApp "lappy"       "lappy" null;
             lappy-light = deployApp "lappy-light" "lappy" null;
+            lappy-min   = deployApp "lappy-min"   "lappy" null;
             moby        = deployApp "moby"        "moby"  null;
             moby-light  = deployApp "moby-light"  "moby"  null;
+            moby-min    = deployApp "moby-min"    "moby"  null;
             servo       = deployApp "servo"       "servo" null;
             type = "app";
             program = builtins.toString (pkgs.writeShellScript "predeploy-all" ''
-              # copy the -light variants first; this might be run while waiting on a full build. or the full build failed.
+              # copy the -min/-light variants first; this might be run while waiting on a full build. or the full build failed.
+              nix run '.#preDeploy.moby-min' -- "$@"
+              nix run '.#preDeploy.lappy-min' -- "$@"
               nix run '.#preDeploy.moby-light' -- "$@"
               nix run '.#preDeploy.lappy-light' -- "$@"
               nix run '.#preDeploy.desko-light' -- "$@"
@@ -541,6 +553,9 @@
               ''
                 # build minimally-usable hosts first, then their full image.
                 # this gives me a minimal image i can deploy or copy over, early.
+                ${checkHost "lappy-min"}
+                ${checkHost "moby-min"}
+
                 ${checkHost "desko-light"}
                 ${checkHost "moby-light"}
                 ${checkHost "lappy-light"}

hosts/by-name/desko/default.nix

@@ -28,6 +28,7 @@
   sane.nixcache.substituters.desko = false;
   sane.nixcache.remote-builders.desko = false;
 
+  sane.programs.cups.enableFor.user.colin = true;
   sane.programs.sway.enableFor.user.colin = true;
   sane.programs.iphoneUtils.enableFor.user.colin = true;
   sane.programs.steam.enableFor.user.colin = true;

hosts/by-name/lappy/default.nix

@@ -14,10 +14,12 @@
   boot.loader.efi.canTouchEfiVariables = false;
   sane.image.extraBootFiles = [ pkgs.bootpart-uefi-x86_64 ];
 
+  sane.programs.cups.enableFor.user.colin = true;
+  sane.programs.stepmania.enableFor.user.colin = true;
   sane.programs.sway.enableFor.user.colin = true;
+
   sane.programs."gnome.geary".config.autostart = true;
   sane.programs.signal-desktop.config.autostart = true;
-  sane.programs.stepmania.enableFor.user.colin = true;
 
   sops.secrets.colin-passwd.neededForUsers = true;
 

hosts/by-name/moby/bootloader.nix

@@ -1,12 +1,22 @@
+# tow-boot: <https://tow-boot.org>
+# docs (pinephone specific): <https://github.com/Tow-Boot/Tow-Boot/tree/development/boards/pine64-pinephoneA64>
+# LED and button behavior is defined here: <https://github.com/Tow-Boot/Tow-Boot/blob/development/modules/tow-boot/phone-ux.nix>
+# - hold VOLDOWN: enter recovery mode
+#   - LED will turn aqua instead of yellow
+#   - recovery mode would ordinarily allow a selection of entries, but for pinephone i guess it doesn't do anything?
+# - hold VOLUP: force it to load the OS from eMMC?
+#   - LED will turn blue instead of yellow
+# boot LEDs:
+# - yellow = entered tow-boot
+# - 10 red flashes => poweroff means tow-boot couldn't boot into the next stage (i.e. distroboot)
+#   - distroboot: <https://source.denx.de/u-boot/u-boot/-/blob/v2022.04/doc/develop/distro.rst>)
 { 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=$out bs=1024 seek=8 conv=notrunc
+  sane.image.installBootloader = ''
+    dd if=${pkgs.tow-boot-pinephone}/Tow-Boot.noenv.bin of=$out/nixos.img bs=1024 seek=8 conv=notrunc
   '';
 }

hosts/by-name/moby/default.nix

@@ -62,18 +62,8 @@
   # HACK/TODO: make `programs.P.env.VAR` behave according to `mime.priority`
   sane.programs.firefox.env = lib.mkForce {};
   sane.programs.epiphany.env.BROWSER = "epiphany";
-
-  # note the .conf.d approach: using ~/.config/pipewire/pipewire.conf directly breaks all audio,
-  # presumably because that deletes the defaults entirely whereas the .conf.d approach selectively overrides defaults
-  sane.user.fs.".config/pipewire/pipewire.conf.d/10-fix-dino-mic-cutout.conf".symlink.text = ''
-    # config docs: <https://gitlab.freedesktop.org/pipewire/pipewire/-/wikis/Config-PipeWire#properties>
-    # useful to run `pw-top` to see that these settings are actually having effect,
-    # and `pw-metadata` to see if any settings conflict (e.g. max-quantum < min-quantum)
-    #
-    # restart pipewire after editing these files:
-    # - `systemctl --user restart pipewire`
-    # - pipewire users will likely stop outputting audio until they are also restarted
-    #
+  sane.programs.pipewire.config = {
+    # tune so Dino doesn't drop audio
     # there's seemingly two buffers for the mic (see: <https://gitlab.freedesktop.org/pipewire/pipewire/-/wikis/FAQ#pipewire-buffering-explained>)
     # 1. Pipewire buffering out of the driver and into its own member.
     # 2. Pipewire buffering into Dino.
@@ -84,11 +74,9 @@
     # `pw-metadata -n settings 0 clock.force-quantum 1024` reduces to about 1 error per second.
     # `pw-metadata -n settings 0 clock.force-quantum 2048` reduces to 1 error every < 10s.
     # pipewire default config includes `clock.power-of-two-quantum = true`
-    context.properties = {
-      default.clock.min-quantum = 2048
-      default.clock.max-quantum = 8192
-    }
-  '';
+    min-quantum = 2048;
+    max-quantum = 8192;
+  };
 
   boot.loader.efi.canTouchEfiVariables = false;
   # /boot space is at a premium. default was 20.
@@ -128,14 +116,6 @@
   # enable rotation sensor
   hardware.sensor.iio.enable = true;
 
-  # TODO: move elsewhere...
-  systemd.services.ModemManager.serviceConfig = {
-    # N.B.: the extra "" in ExecStart serves to force upstream ExecStart to be ignored
-    ExecStart = [ "" "${pkgs.modemmanager}/bin/ModemManager --debug" ];
-    # --debug sets DEBUG level logging: so reset
-    ExecStartPost = [ "${pkgs.modemmanager}/bin/mmcli --set-logging=INFO" ];
-  };
-
   services.udev.extraRules = let
     chmod = "${pkgs.coreutils}/bin/chmod";
     chown = "${pkgs.coreutils}/bin/chown";

hosts/by-name/moby/gps.nix

@@ -64,6 +64,5 @@
     "dialout"  # TODO: figure out if dialout is required. that's for /dev/ttyUSB1, but geoclue probably doesn't read that?
   ];
 
-  sane.services.eg25-control.enable = true;
   sane.programs.where-am-i.enableFor.user.colin = true;
 }

hosts/by-name/servo/fs.nix

@@ -8,6 +8,7 @@
 # - 1. identify disk IDs: `ls -l /dev/disk/by-id`
 # - 2. pool these disks: `zpool create -f -m legacy pool raidz ata-ST4000VN008-2DR166_WDH0VB45 ata-ST4000VN008-2DR166_WDH17616 ata-ST4000VN008-2DR166_WDH0VC8Q ata-ST4000VN008-2DR166_WDH17680`
 #   - legacy documented: <https://superuser.com/questions/790036/what-is-a-zfs-legacy-mount-point>
+# - 3. enable acl support: `zfs set acltype=posixacl pool`
 #
 # import pools: `zpool import pool`
 # show zfs datasets: `zfs list` (will be empty if haven't imported)
@@ -25,6 +26,7 @@
   # scrub all zfs pools weekly:
   services.zfs.autoScrub.enable = true;
   boot.extraModprobeConfig = ''
+    ### zfs_arc_max tunable:
     # ZFS likes to use half the ram for its own cache and let the kernel push everything else to swap.
     # so, reduce its cache size
     # see: <https://askubuntu.com/a/1290387>
@@ -33,7 +35,13 @@
     # for all tunables, see: `man 4 zfs`
     # to update these parameters without rebooting:
     # - `echo '4294967296' | sane-sudo-redirect /sys/module/zfs/parameters/zfs_arc_max`
-    options zfs zfs_arc_max=4294967296
+    ### zfs_bclone_enabled tunable
+    # this allows `cp --reflink=always FOO BAR` to work. i.e. shallow copies.
+    # it's unstable as of 2.2.3. led to *actual* corruption in 2.2.1, but hopefully better by now.
+    # - <https://github.com/openzfs/zfs/issues/405>
+    # note that `du -h` won't *always* show the reduced size for reflink'd files (?).
+    # `zpool get all | grep clone` seems to be the way to *actually* see how much data is being deduped
+    options zfs zfs_arc_max=4294967296 zfs_bclone_enabled=1
   '';
   # to be able to mount the pool like this, make sure to tell zfs to NOT manage it itself.
   # otherwise local-fs.target will FAIL and you will be dropped into a rescue shell.
@@ -43,6 +51,7 @@
   fileSystems."/mnt/pool" = {
     device = "pool";
     fsType = "zfs";
+    options = [ "acl" ];  #< not sure if this `acl` flag is actually necessary. it mounts without it.
   };
   # services.zfs.zed = ... # TODO: zfs can send me emails when disks fail
   sane.programs.sysadminUtils.suggestedPrograms = [ "zfs" ];
@@ -82,12 +91,17 @@
   };
   sane.fs."/mnt/usb-hdd".mount = {};
 
-  sane.persist.sys.byStore.plaintext = [{
+  # FIRST TIME SETUP FOR MEDIA DIRECTORY:
+  # - set the group stick bit: `sudo find /var/media -type d -exec chmod g+s {} +`
+  #   - this ensures new files/dirs inherit the group of their parent dir (instead of the user who creates them)
+  # - ensure everything under /var/media is mounted with `-o acl`, to support acls
+  # - ensure all files are rwx by group: `setfacl --recursive --modify d:g::rwx /var/media`
+  #   - alternatively, `d:g:media:rwx` to grant `media` group even when file has a different owner, but that's a bit complex
+  sane.persist.sys.byStore.ext = [{
     path = "/var/media";
-    method = "bind";  #< this HAS to be `bind` if we're going to persist the whole thing but create subdirs, as below.
     user = "colin";
     group = "media";
-    mode = "0755";
+    mode = "0775";
   }];
   sane.fs."/var/media/archive".dir = {};
   # this is file.text instead of symlink.text so that it may be read over a remote mount (where consumers might not have any /nix/store/.../README.md path)
@@ -101,7 +115,7 @@
   sane.fs."/var/media/Books/Books".dir = {};
   sane.fs."/var/media/Books/Visual".dir = {};
   sane.fs."/var/media/collections".dir = {};
-  sane.fs."/var/media/datasets".dir = {};
+  # sane.fs."/var/media/datasets".dir = {};
   sane.fs."/var/media/freeleech".dir = {};
   sane.fs."/var/media/Music".dir = {};
   sane.fs."/var/media/Pictures".dir = {};
@@ -116,27 +130,6 @@
     this directory exists on SSD, allowing for speedy access to specific datasets when necessary.
     the contents should be a subset of what's in ../media/datasets.
   '';
-  # make sure large media is stored to the HDD
-  sane.persist.sys.byStore.ext = [
-    {
-      user = "colin";
-      group = "users";
-      mode = "0777";
-      path = "/var/media/Videos";
-    }
-    {
-      user = "colin";
-      group = "users";
-      mode = "0777";
-      path = "/var/media/freeleech";
-    }
-    {
-      user = "colin";
-      group = "users";
-      mode = "0775";
-      path = "/var/lib/uninsane/datasets";
-    }
-  ];
 
   # btrfs doesn't easily support swapfiles
   # swapDevices = [

hosts/by-name/servo/net.nix

@@ -87,7 +87,7 @@ in
         }
       ];
       preSetup = ''
-        ${ip} netns add ovpns || echo "ovpns already exists"
+        ${ip} netns add ovpns || (test -e /run/netns/ovpns && echo "ovpns already exists")
       '';
       postShutdown = ''
         ${in-ns} ip link del ovpns-veth-b || echo "couldn't delete ovpns-veth-b"

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

@@ -24,7 +24,7 @@ lib.mkIf false
   # services.calibre-web.options.calibreLibrary = svc-dir;
 
   services.nginx.virtualHosts."calibre.uninsane.org" = {
-    addSSL = true;
+    forceSSL = true;
     enableACME = true;
     locations."/" = {
       proxyPass = "http://${ip}:${builtins.toString port}";

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

@@ -24,50 +24,57 @@
 #   that is NOT the case when the STUN server and client A are on the same LAN
 #   even if client A contacts the STUN server via its WAN address with port reflection enabled.
 #   hence, there's no obvious way to put the STUN server on the same LAN as either client and expect the rest to work.
+# - there an old version which *half worked*, which is:
+#   - run the turn server in the root namespace.
+#   - bind the turn server to the veth connecting it to the VPN namespace (so it sends outgoing traffic to the right place).
+#   - NAT the turn port range from VPN into root namespace (so it receives incomming traffic).
+#   - this approach would fail the prosody conversations.im check, but i didn't notice *obvious* call routing errors.
 { lib, ... }:
 let
-  # TODO: this range could be larger, but right now that's costly because each element is its own UPnP forward
-  # TURN port range (inclusive)
-  turnPortLow = 49152;
-  turnPortHigh = 49167;
+  # TURN port range (inclusive).
+  # default coturn behavior is to use the upper quarter of all ports. i.e. 49152 - 65535.
+  # i believe TURN allocations expire after either 5 or 10 minutes of inactivity.
+  turnPortLow = 49152; # 49152 = 0xc000
+  turnPortHigh = turnPortLow + 256;
   turnPortRange = lib.range turnPortLow turnPortHigh;
 in
 {
-  sane.ports.ports = lib.mkMerge ([
-    {
-      "3478" = {
-        # this is the "control" port.
-        # i.e. no client data is forwarded through it, but it's where clients request tunnels.
-        protocol = [ "tcp" "udp" ];
-        # visibleTo.lan = true;
-        # visibleTo.wan = true;
-        visibleTo.ovpn = true;
-        description = "colin-stun-turn";
-      };
-      "5349" = {
-        # the other port 3478 also supports TLS/DTLS, but presumably clients wanting TLS will default 5349
-        protocol = [ "tcp" ];
-        # visibleTo.lan = true;
-        # visibleTo.wan = true;
-        visibleTo.ovpn = true;
-        description = "colin-stun-turn-over-tls";
-      };
-    }
-  ] ++ (builtins.map
-    (port: {
-      "${builtins.toString port}" = let
-        count = port - turnPortLow + 1;
-        numPorts = turnPortHigh - turnPortLow + 1;
-      in {
-        protocol = [ "tcp" "udp" ];
-        # visibleTo.lan = true;
-        # visibleTo.wan = true;
-        visibleTo.ovpn = true;
-        description = "colin-turn-${builtins.toString count}-of-${builtins.toString numPorts}";
-      };
-    })
-    turnPortRange
-  ));
+  # the port definitions are only needed if running in the root net namespace
+  # sane.ports.ports = lib.mkMerge ([
+  #   {
+  #     "3478" = {
+  #       # this is the "control" port.
+  #       # i.e. no client data is forwarded through it, but it's where clients request tunnels.
+  #       protocol = [ "tcp" "udp" ];
+  #       # visibleTo.lan = true;
+  #       # visibleTo.wan = true;
+  #       visibleTo.ovpn = true;  # forward traffic from the VPN to the root NS
+  #       description = "colin-stun-turn";
+  #     };
+  #     "5349" = {
+  #       # the other port 3478 also supports TLS/DTLS, but presumably clients wanting TLS will default 5349
+  #       protocol = [ "tcp" ];
+  #       # visibleTo.lan = true;
+  #       # visibleTo.wan = true;
+  #       visibleTo.ovpn = true;
+  #       description = "colin-stun-turn-over-tls";
+  #     };
+  #   }
+  # ] ++ (builtins.map
+  #   (port: {
+  #     "${builtins.toString port}" = let
+  #       count = port - turnPortLow + 1;
+  #       numPorts = turnPortHigh - turnPortLow + 1;
+  #     in {
+  #       protocol = [ "tcp" "udp" ];
+  #       # visibleTo.lan = true;
+  #       # visibleTo.wan = true;
+  #       visibleTo.ovpn = true;
+  #       description = "colin-turn-${builtins.toString count}-of-${builtins.toString numPorts}";
+  #     };
+  #   })
+  #   turnPortRange
+  # ));
 
   services.nginx.virtualHosts."turn.uninsane.org" = {
     # allow ACME to procure a cert via nginx for this domain
@@ -113,12 +120,15 @@ in
     "verbose"
     # "Verbose"  #< even MORE verbosity than "verbose"
     # "no-multicast-peers"  # disables sending to IPv4 broadcast addresses (e.g. 224.0.0.0/3)
-    "listening-ip=10.0.1.5"
+    # "listening-ip=10.0.1.5" "external-ip=185.157.162.178"  #< 2024/04/25: works, if running in root namespace
+    "listening-ip=185.157.162.178" "external-ip=185.157.162.178"
+
+    # old attempts:
     # "external-ip=185.157.162.178/10.0.1.5"
-    "external-ip=185.157.162.178"
     # "listening-ip=10.78.79.51"  # can be specified multiple times; omit for *
     # "external-ip=97.113.128.229/10.78.79.51"
     # "external-ip=97.113.128.229"
     # "mobility"  # "mobility with ICE (MICE) specs support" (?)
   ];
+  systemd.services.coturn.serviceConfig.NetworkNamespacePath = "/run/netns/ovpns";
 }

hosts/by-name/servo/services/cryptocurrencies/clightning-sane/clightning-sane

@@ -1,6 +1,22 @@
 #!/usr/bin/env nix-shell
 #!nix-shell -i python3 -p "python3.withPackages (ps: [ ps.pyln-client ])"
 
+"""
+clightning-sane: helper to perform common Lightning node admin operations:
+- view channel balances
+- rebalance channels
+
+COMMON OPERATIONS:
+- view channel balances: `clightning-sane status`
+- rebalance channels to improve routability (without paying any fees): `clightning-sane autobalance`
+
+FULL OPERATION:
+- `clightning-sane status --full`
+  - `P$`: represents how many msats i've captured in fees from this channel.
+  - `COST`: rough measure of how much it's "costing" me to let my channel partner hold funds on his side of the channel.
+            this is based on the notion that i only capture fees from outbound transactions, and so the channel partner holding all liquidity means i can't capture fees on that liquidity.
+"""
+
 # pyln-client docs: <https://github.com/ElementsProject/lightning/tree/master/contrib/pyln-client>
 # terminology:
 # - "scid": "Short Channel ID", e.g. 123456x7890x0
@@ -726,7 +742,7 @@ def main():
     logging.basicConfig()
     logger.setLevel(logging.INFO)
 
-    parser = argparse.ArgumentParser(description="rebalance lightning channel balances")
+    parser = argparse.ArgumentParser(description=__doc__)
     parser.add_argument("--verbose", action="store_true", help="more logging")
     parser.add_argument("--min-msat", default="999", help="min transaction size")
     parser.add_argument("--max-msat", default="1000000", help="max transaction size")

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

@@ -2,7 +2,7 @@
 {
   imports = [
     ./nfs.nix
-    ./sftpgo.nix
+    ./sftpgo
   ];
 
   users.groups.export = {};

hosts/by-name/servo/services/export/nfs.nix

@@ -26,7 +26,7 @@
     description = "NFS server portmapper";
   };
   sane.ports.ports."2049" = {
-    protocol = [ "tcp" ];
+    protocol = [ "tcp" "udp" ];
     visibleTo.lan = true;
     description = "NFS server";
   };
@@ -51,6 +51,23 @@
   services.nfs.server.mountdPort = 4002;
   services.nfs.server.statdPort = 4000;
 
+  services.nfs.extraConfig = ''
+    [nfsd]
+    # XXX: NFS over UDP REQUIRES SPECIAL CONFIG TO AVOID DATA LOSS.
+    # see `man 5 nfs`: "Using NFS over UDP on high-speed links".
+    # it's actually just a general property of UDP over IPv4 (IPv6 fixes it).
+    # both the client and the server should configure a shorter-than-default IPv4 fragment reassembly window to mitigate.
+    # OTOH, tunneling NFS over Wireguard also bypasses this weakness, because a mis-assembled packet would not have a valid signature.
+    udp=y
+
+    [exports]
+    # all export paths are relative to rootdir.
+    # for NFSv4, the export with fsid=0 behaves as `/` publicly,
+    # but NFSv3 implements no such feature.
+    # using `rootdir` instead of relying on `fsid=0` allows consistent export paths regardless of NFS proto version
+    rootdir=/var/export
+  '';
+
   # format:
   #   fspoint	visibility(options)
   # options:
@@ -85,13 +102,20 @@
       in "${export} 10.78.79.0/22(${lib.concatStringsSep "," lanOpts}) 10.0.10.0/24(${lib.concatStringsSep "," vpnOpts})";
   in lib.concatStringsSep "\n" [
     (fmtExport {
-      export = "/var/export";
+      export = "/";
       baseOpts = [ "crossmnt" "fsid=root" ];
       extraLanOpts = [ "ro" ];
       extraVpnOpts = [ "rw" "no_root_squash" ];
     })
     (fmtExport {
-      export = "/var/export/playground";
+      # provide /media as an explicit export. NFSv4 can transparently mount a subdir of an export, but NFSv3 can only mount paths which are exports.
+      export = "/media";
+      baseOpts = [ "crossmnt" ];  # TODO: is crossmnt needed here?
+      extraLanOpts = [ "ro" ];
+      extraVpnOpts = [ "rw" "no_root_squash" ];
+    })
+    (fmtExport {
+      export = "/playground";
       baseOpts = [
         "mountpoint"
         "all_squash"

hosts/by-name/servo/services/export/sftpgo.nix

@@ -1,186 +0,0 @@
-# docs:
-# - <https://github.com/drakkan/sftpgo>
-# - config options: <https://github.com/drakkan/sftpgo/blob/main/docs/full-configuration.md>
-# - config defaults: <https://github.com/drakkan/sftpgo/blob/main/sftpgo.json>
-# - nixos options: <repo:nixos/nixpkgs:nixos/modules/services/web-apps/sftpgo.nix>
-# - nixos example: <repo:nixos/nixpkgs:nixos/tests/sftpgo.nix>
-#
-# sftpgo is a FTP server that also supports WebDAV, SFTP, and web clients.
-#
-# TODO: change umask so sftpgo-created files default to 644.
-# - it does indeed appear that the 600 is not something sftpgo is explicitly doing.
-
-
-{ config, lib, pkgs, sane-lib, ... }:
-let
-  # user permissions:
-  # - see <repo:drakkan/sftpgo:internal/dataprovider/user.go>
-  # - "*" = grant all permissions
-  # - read-only perms:
-  #   - "list" = list files and directories
-  #   - "download"
-  # - rw perms:
-  #   - "upload"
-  #   - "overwrite" = allow uploads to replace existing files
-  #   - "delete" = delete files and directories
-  #     - "delete_files"
-  #     - "delete_dirs"
-  #   - "rename" = rename files and directories
-  #     - "rename_files"
-  #     - "rename_dirs"
-  #   - "create_dirs"
-  #   - "create_symlinks"
-  #   - "chmod"
-  #   - "chown"
-  #   - "chtimes" = change atime/mtime (access and modification times)
-  #
-  # home_dir:
-  # - it seems (empirically) that a user can't cd above their home directory.
-  #   though i don't have a reference for that in the docs.
-  authResponseSuccess = {
-    status = 1;
-    username = "anonymous";
-    expiration_date = 0;
-    home_dir = "/var/export";
-    # uid/gid 0 means to inherit sftpgo uid.
-    # - i.e. users can't read files which Linux user `sftpgo` can't read
-    # - uploaded files belong to Linux user `sftpgo`
-    # other uid/gid values aren't possible for localfs backend, unless i let sftpgo use `sudo`.
-    uid = 0;
-    gid = 0;
-    # uid = 65534;
-    # gid = 65534;
-    max_sessions = 0;
-    # quota_*: 0 means to not use SFTP's quota system
-    quota_size = 0;
-    quota_files = 0;
-    permissions = {
-      "/" = [ "list" "download" ];
-      "/playground" = [
-        # read-only:
-        "list"
-        "download"
-        # write:
-        "upload"
-        "overwrite"
-        "delete"
-        "rename"
-        "create_dirs"
-        "create_symlinks"
-        # intentionally omitted:
-        # "chmod"
-        # "chown"
-        # "chtimes"
-      ];
-    };
-    upload_bandwidth = 0;
-    download_bandwidth = 0;
-    filters = {
-      allowed_ip = [];
-      denied_ip = [];
-    };
-    public_keys = [];
-    # other fields:
-    # ? groups
-    # ? virtual_folders
-  };
-  authResponseFail = {
-    username = "";
-  };
-  authSuccessJson = pkgs.writeText "sftp-auth-success.json" (builtins.toJSON authResponseSuccess);
-  authFailJson = pkgs.writeText "sftp-auth-fail.json" (builtins.toJSON authResponseFail);
-  unwrappedAuthProgram = pkgs.static-nix-shell.mkBash {
-    pname = "sftpgo_external_auth_hook";
-    srcRoot = ./.;
-    pkgs = [ "coreutils" ];
-  };
-  authProgram = pkgs.writeShellScript "sftpgo-auth-hook" ''
-    ${unwrappedAuthProgram}/bin/sftpgo_external_auth_hook ${authFailJson} ${authSuccessJson}
-  '';
-in
-{
-  # Client initiates a FTP "control connection" on port 21.
-  # - this handles the client -> server commands, and the server -> client status, but not the actual data
-  # - file data, directory listings, etc need to be transferred on an ephemeral "data port".
-  # - 50000-50100 is a common port range for this.
-  sane.ports.ports = {
-    "21" = {
-      protocol = [ "tcp" ];
-      visibleTo.lan = true;
-      description = "colin-FTP server";
-    };
-  } // (sane-lib.mapToAttrs
-    (port: {
-      name = builtins.toString port;
-      value = {
-        protocol = [ "tcp" ];
-        visibleTo.lan = true;
-        description = "colin-FTP server data port range";
-      };
-    })
-    (lib.range 50000 50100)
-  );
-
-  services.sftpgo = {
-    enable = true;
-    group = "export";
-    settings = {
-      ftpd = {
-        bindings = [
-          {
-            # binding this means any wireguard client can connect
-            address = "10.0.10.5";
-            port = 21;
-            debug = true;
-          }
-          {
-            # binding this means any LAN client can connect
-            address = "10.78.79.51";
-            port = 21;
-            debug = true;
-          }
-        ];
-
-        # active mode is susceptible to "bounce attacks", without much benefit over passive mode
-        disable_active_mode = true;
-        hash_support = true;
-        passive_port_range = {
-          start = 50000;
-          end = 50100;
-        };
-
-        banner = ''
-          Welcome, friends, to Colin's read-only FTP server! Also available via NFS on the same host.
-          Username: "anonymous"
-          Password: "anonymous"
-          CONFIGURE YOUR CLIENT FOR "PASSIVE" mode, e.g. `ftp --passive uninsane.org`
-          Please let me know if anything's broken or not as it should be. Otherwise, browse and DL freely :)
-        '';
-
-      };
-      data_provider = {
-        driver = "memory";
-        external_auth_hook = "${authProgram}";
-        # track_quota:
-        # - 0: disable quota tracking
-        # - 1: quota is updated on every upload/delete, even if user has no quota restriction
-        # - 2: quota is updated on every upload/delete, but only if user/folder has a quota restriction  (default, i think)
-        # track_quota = 2;
-      };
-    };
-  };
-
-  users.users.sftpgo.extraGroups = [ "export" ];
-
-  systemd.services.sftpgo = {
-    after = [ "network-online.target" ];
-    wants = [ "network-online.target" ];
-    serviceConfig = {
-      ReadOnlyPaths = [ "/var/export" ];
-      ReadWritePaths = [ "/var/export/playground" ];
-
-      Restart = "always";
-      RestartSec = "20s";
-    };
-  };
-}

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

@@ -0,0 +1,167 @@
+# docs:
+# - <https://github.com/drakkan/sftpgo>
+# - config options: <https://github.com/drakkan/sftpgo/blob/main/docs/full-configuration.md>
+# - config defaults: <https://github.com/drakkan/sftpgo/blob/main/sftpgo.json>
+# - nixos options: <repo:nixos/nixpkgs:nixos/modules/services/web-apps/sftpgo.nix>
+# - nixos example: <repo:nixos/nixpkgs:nixos/tests/sftpgo.nix>
+#
+# sftpgo is a FTP server that also supports WebDAV, SFTP, and web clients.
+
+{ config, lib, pkgs, sane-lib, ... }:
+let
+  external_auth_hook = pkgs.static-nix-shell.mkPython3Bin {
+    pname = "external_auth_hook";
+    srcRoot = ./.;
+  };
+  # Client initiates a FTP "control connection" on port 21.
+  # - this handles the client -> server commands, and the server -> client status, but not the actual data
+  # - file data, directory listings, etc need to be transferred on an ephemeral "data port".
+  # - 50000-50100 is a common port range for this.
+  #   50000 is used by soulseek.
+  passiveStart = 50050;
+  passiveEnd   = 50070;
+in
+{
+  sane.ports.ports = {
+    "21" = {
+      protocol = [ "tcp" ];
+      visibleTo.lan = true;
+      # visibleTo.wan = true;
+      description = "colin-FTP server";
+    };
+    "990" = {
+      protocol = [ "tcp" ];
+      visibleTo.lan = true;
+      visibleTo.wan = true;
+      description = "colin-FTPS server";
+    };
+  } // (sane-lib.mapToAttrs
+    (port: {
+      name = builtins.toString port;
+      value = {
+        protocol = [ "tcp" ];
+        visibleTo.lan = true;
+        visibleTo.wan = true;
+        description = "colin-FTP server data port range";
+      };
+    })
+    (lib.range passiveStart passiveEnd)
+  );
+
+  # use nginx/acme to produce a cert for FTPS
+  services.nginx.virtualHosts."ftp.uninsane.org" = {
+    addSSL = true;
+    enableACME = true;
+  };
+  sane.dns.zones."uninsane.org".inet.CNAME."ftp" = "native";
+
+  services.sftpgo = {
+    enable = true;
+    group = "export";
+
+    package = lib.warnIf (lib.versionOlder "2.5.6" pkgs.sftpgo.version) "sftpgo update: safe to use nixpkgs' sftpgo but keep my own `patches`" pkgs.buildGoModule {
+      inherit (pkgs.sftpgo) name ldflags nativeBuildInputs doCheck subPackages postInstall passthru meta;
+      version = "2.5.6-unstable-2024-04-18";
+      src = pkgs.fetchFromGitHub {
+        # need to use > 2.5.6 for sftpgo_safe_fileinfo.patch to apply
+        owner = "drakkan";
+        repo = "sftpgo";
+        rev = "950cf67e4c03a12c7e439802cabbb0b42d4ee5f5";
+        hash = "sha256-UfiFd9NK3DdZ1J+FPGZrM7r2mo9xlKi0dsSlLEinYXM=";
+      };
+      vendorHash = "sha256-n1/9A2em3BCtFX+132ualh4NQwkwewMxYIMOphJEamg=";
+      patches = (pkgs.sftpgo.patches or []) ++ [
+        # fix for compatibility with kodi:
+        # ftp LIST operation returns entries over-the-wire like:
+        # - dgrwxrwxr-x 1 ftp ftp            9 Apr  9 15:05 Videos
+        # however not all clients understand all mode bits (like that `g`, indicating SGID / group sticky bit).
+        # instead, only send mode bits which are well-understood.
+        # the full set of bits, from which i filter, is found here: <https://pkg.go.dev/io/fs#FileMode>
+        ./safe_fileinfo.patch
+      ];
+    };
+
+    settings = {
+      ftpd = {
+        bindings = [
+          {
+            # binding this means any wireguard client can connect
+            address = "10.0.10.5";
+            port = 21;
+            debug = true;
+          }
+          {
+            # binding this means any LAN client can connect (also WAN traffic forwarded from the gateway)
+            address = "10.78.79.51";
+            port = 21;
+            debug = true;
+          }
+          {
+            # binding this means any wireguard client can connect
+            address = "10.0.10.5";
+            port = 990;
+            debug = true;
+            tls_mode = 2;  # 2 = "implicit FTPS": client negotiates TLS before any FTP command.
+          }
+          {
+            # binding this means any LAN client can connect (also WAN traffic forwarded from the gateway)
+            address = "10.78.79.51";
+            port = 990;
+            debug = true;
+            tls_mode = 2;  # 2 = "implicit FTPS": client negotiates TLS before any FTP command.
+          }
+        ];
+
+        # active mode is susceptible to "bounce attacks", without much benefit over passive mode
+        disable_active_mode = true;
+        hash_support = true;
+        passive_port_range = {
+          start = passiveStart;
+          end = passiveEnd;
+        };
+
+        certificate_file = "/var/lib/acme/ftp.uninsane.org/full.pem";
+        certificate_key_file = "/var/lib/acme/ftp.uninsane.org/key.pem";
+
+        banner = ''
+          Welcome, friends, to Colin's FTP server! Also available via NFS on the same host, but LAN-only.
+
+          Read-only access (LAN-restricted):
+          Username: "anonymous"
+          Password: "anonymous"
+
+          CONFIGURE YOUR CLIENT FOR "PASSIVE" MODE, e.g. `ftp --passive ftp.uninsane.org`.
+          Please let me know if anything's broken or not as it should be. Otherwise, browse and transfer freely :)
+        '';
+
+      };
+      data_provider = {
+        driver = "memory";
+        external_auth_hook = "${external_auth_hook}/bin/external_auth_hook";
+        # track_quota:
+        # - 0: disable quota tracking
+        # - 1: quota is updated on every upload/delete, even if user has no quota restriction
+        # - 2: quota is updated on every upload/delete, but only if user/folder has a quota restriction  (default, i think)
+        # track_quota = 2;
+      };
+    };
+  };
+
+  users.users.sftpgo.extraGroups = [
+    "export"
+    "media"
+    "nginx"  # to access certs
+  ];
+
+  systemd.services.sftpgo = {
+    after = [ "network-online.target" ];
+    wants = [ "network-online.target" ];
+    serviceConfig = {
+      ReadWritePaths = [ "/var/export" ];
+
+      Restart = "always";
+      RestartSec = "20s";
+      UMask = lib.mkForce "0002";
+    };
+  };
+}

hosts/by-name/servo/services/export/sftpgo/external_auth_hook

@@ -0,0 +1,157 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i python3 -p "python3.withPackages (ps: [  ])"
+# vim: set filetype=python :
+#
+# available environment variables:
+# - SFTPGO_AUTHD_USERNAME
+# - SFTPGO_AUTHD_USER
+# - SFTPGO_AUTHD_IP
+# - SFTPGO_AUTHD_PROTOCOL  = { "DAV", "FTP", "HTTP", "SSH" }
+# - SFTPGO_AUTHD_PASSWORD
+# - SFTPGO_AUTHD_PUBLIC_KEY
+# - SFTPGO_AUTHD_KEYBOARD_INTERACTIVE
+# - SFTPGO_AUTHD_TLS_CERT
+#
+# user permissions:
+# - see <repo:drakkan/sftpgo:internal/dataprovider/user.go>
+# - "*" = grant all permissions
+# - read-only perms:
+#   - "list" = list files and directories
+#   - "download"
+# - rw perms:
+#   - "upload"
+#   - "overwrite" = allow uploads to replace existing files
+#   - "delete" = delete files and directories
+#     - "delete_files"
+#     - "delete_dirs"
+#   - "rename" = rename files and directories
+#     - "rename_files"
+#     - "rename_dirs"
+#   - "create_dirs"
+#   - "create_symlinks"
+#   - "chmod"
+#   - "chown"
+#   - "chtimes" = change atime/mtime (access and modification times)
+#
+# home_dir:
+# - it seems (empirically) that a user can't cd above their home directory.
+#   though i don't have a reference for that in the docs.
+
+import crypt
+import json
+import os
+
+from hmac import compare_digest
+
+authFail = dict(username="")
+
+PERM_RO = [ "list", "download" ]
+PERM_RW = [
+  # read-only:
+  "list",
+  "download",
+  # write:
+  "upload",
+  "overwrite",
+  "delete",
+  "rename",
+  "create_dirs",
+  "create_symlinks",
+  # intentionally omitted:
+  # "chmod",
+  # "chown",
+  # "chtimes",
+]
+
+TRUSTED_CREDS = [
+  # /etc/shadow style creds.
+  # mkpasswd -m sha-512
+  # $<method>$<salt>$<hash>
+  "$6$Zq3c2u4ghUH4S6EP$pOuRt13sEKfX31OqPbbd1LuhS21C9MICMc94iRdTAgdAcJ9h95gQH/6Jf6Ie4Obb0oxQtojRJ1Pd/9QHOlFMW."  #< m. rocket boy
+]
+
+def mkAuthOk(username: str, permissions: dict[str, list[str]]) -> dict:
+  return dict(
+    status = 1,
+    username = username,
+    expiration_date = 0,
+    home_dir = "/var/export",
+    # uid/gid 0 means to inherit sftpgo uid.
+    # - i.e. users can't read files which Linux user `sftpgo` can't read
+    # - uploaded files belong to Linux user `sftpgo`
+    # other uid/gid values aren't possible for localfs backend, unless i let sftpgo use `sudo`.
+    uid = 0,
+    gid = 0,
+    # uid = 65534,
+    # gid = 65534,
+    max_sessions = 0,
+    # quota_*: 0 means to not use SFTP's quota system
+    quota_size = 0,
+    quota_files = 0,
+    permissions = permissions,
+    upload_bandwidth = 0,
+    download_bandwidth = 0,
+    filters = dict(
+      allowed_ip = [],
+      denied_ip = [],
+    ),
+    public_keys = [],
+    # other fields:
+    # ? groups
+    # ? virtual_folders
+  )
+
+def isLan(ip: str) -> bool:
+  return ip.startswith("10.78.76.") \
+    or ip.startswith("10.78.77.") \
+    or ip.startswith("10.78.78.") \
+    or ip.startswith("10.78.79.")
+
+def isWireguard(ip: str) -> bool:
+  return ip.startswith("10.0.10.")
+
+def isTrustedCred(password: str) -> bool:
+  for cred in TRUSTED_CREDS:
+    _, method, salt, hash_ = cred.split("$")
+    # assert method == "6", f"unrecognized crypt entry: {cred}"
+    if crypt.crypt(password, f"${method}${salt}") == cred:
+        return True
+
+  return False
+
+def getAuthResponse(ip: str, username: str, password: str) -> dict:
+  """
+  return a sftpgo auth response either denying the user or approving them
+  with a set of permissions.
+  """
+  if isTrustedCred(password) and username != "colin":
+    # allow r/w access from those with a special token
+    return mkAuthOk(username, permissions = {
+      "/": PERM_RW,
+      "/playground": PERM_RW,
+    })
+  if isWireguard(ip):
+    # allow any user from wireguard
+    return mkAuthOk(username, permissions = {
+      "/": PERM_RW,
+      "/playground": PERM_RW,
+    })
+  if isLan(ip):
+    if username == "anonymous":
+      # allow anonymous users on the LAN
+      return mkAuthOk("anonymous", permissions = {
+        "/": PERM_RO,
+        "/playground": PERM_RW,
+      })
+
+  return authFail
+
+def main():
+  ip = os.environ.get("SFTPGO_AUTHD_IP", "")
+  username = os.environ.get("SFTPGO_AUTHD_USERNAME", "")
+  password = os.environ.get("SFTPGO_AUTHD_PASSWORD", "")
+  resp = getAuthResponse(ip, username, password)
+  print(json.dumps(resp))
+
+if __name__ == "__main__":
+  main()

hosts/by-name/servo/services/export/sftpgo/safe_fileinfo.patch

@@ -0,0 +1,32 @@
+diff --git a/internal/ftpd/handler.go b/internal/ftpd/handler.go
+index 036c3977..33211261 100644
+--- a/internal/ftpd/handler.go
++++ b/internal/ftpd/handler.go
+@@ -169,7 +169,7 @@ func (c *Connection) Stat(name string) (os.FileInfo, error) {
+ 		}
+ 		return nil, err
+ 	}
+-	return fi, nil
++	return vfs.NewFileInfo(name, fi.IsDir(), fi.Size(), fi.ModTime(), false), nil
+ }
+
+ // Name returns the name of this connection
+@@ -315,7 +315,17 @@ func (c *Connection) ReadDir(name string) (ftpserver.DirLister, error) {
+ 		}, nil
+ 	}
+
+-	return c.ListDir(name)
++	lister, err := c.ListDir(name)
++	if err != nil {
++		return nil, err
++	}
++	return &patternDirLister{
++		DirLister:      lister,
++		pattern:        "*",
++		lastCommand:    c.clientContext.GetLastCommand(),
++		dirName:        name,
++		connectionPath: c.clientContext.Path(),
++	}, nil
+ }
+
+ // GetHandle implements ClientDriverExtentionFileTransfer

hosts/by-name/servo/services/export/sftpgo_external_auth_hook

@@ -1,23 +0,0 @@
-#!/usr/bin/env nix-shell
-#!nix-shell -i bash -p coreutils
-# vim: set filetype=bash :
-#
-# available environment variables:
-# - SFTPGO_AUTHD_USERNAME
-# - SFTPGO_AUTHD_USER
-# - SFTPGO_AUTHD_IP
-# - SFTPGO_AUTHD_PROTOCOL  = { "DAV", "FTP", "HTTP", "SSH" }
-# - SFTPGO_AUTHD_PASSWORD
-# - SFTPGO_AUTHD_PUBLIC_KEY
-# - SFTPGO_AUTHD_KEYBOARD_INTERACTIVE
-# - SFTPGO_AUTHD_TLS_CERT
-#
-#
-# call with <script_name> /path/to/fail/response.json /path/to/success/response.json
-
-
-if [ "$SFTPGO_AUTHD_USERNAME" = "anonymous" ]; then
-  cat "$2"
-else
-  cat "$1"
-fi

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

@@ -20,7 +20,7 @@
           --ignore-panel=HOSTS \
           --ws-url=wss://sink.uninsane.org:443/ws \
           --port=7890 \
-          -o /var/lib/uninsane/sink/index.html
+          -o /var/lib/goaccess/index.html
       '';
       ExecReload = "${pkgs.coreutils}/bin/kill -HUP $MAINPID";
       Type = "simple";
@@ -28,17 +28,19 @@
       RestartSec = "10s";
 
       # hardening
-      WorkingDirectory = "/tmp";
+      # TODO: run as `goaccess` user and add `goaccess` user to group `nginx`.
       NoNewPrivileges = true;
+      PrivateDevices = "yes";
       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";
+      ProtectSystem = "strict";
+      ReadOnlyPaths = [ "/var/log/nginx" ];
+      ReadWritePaths = [ "/proc/self" "/var/lib/goaccess" ];
+      StateDirectory = "goaccess";
+      SystemCallFilter = "~@clock @cpu-emulation @debug @keyring @memlock @module @mount @obsolete @privileged @reboot @resources @setuid @swap @raw-io";
+      WorkingDirectory = "/var/lib/goaccess";
     };
     after = [ "network.target" ];
     wantedBy = [ "multi-user.target" ];
@@ -49,7 +51,7 @@
     addSSL = true;
     enableACME = true;
     # inherit kTLS;
-    root = "/var/lib/uninsane/sink";
+    root = "/var/lib/goaccess";
 
     locations."/ws" = {
       proxyPass = "http://127.0.0.1:7890";

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

@@ -1,4 +1,4 @@
-{ ... }:
+{ lib, pkgs, ... }:
 
 {
   sane.persist.sys.byStore.plaintext = [
@@ -12,6 +12,8 @@
   systemd.services.jackett.serviceConfig = {
     # run this behind the OVPN static VPN
     NetworkNamespacePath = "/run/netns/ovpns";
+    ExecStartPre = [ "${lib.getExe pkgs.sane-scripts.ip-check} --no-upnp --expect 185.157.162.178" ];  # abort if public IP is not as expected
+
     # patch jackett to listen on the public interfaces
     # ExecStart = lib.mkForce "${pkgs.jackett}/bin/Jackett --NoUpdates --DataFolder /var/lib/jackett/.config/Jackett --ListenPublic";
   };

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

@@ -75,7 +75,7 @@
   # Jellyfin multimedia server
   # this is mostly taken from the official jellfin.org docs
   services.nginx.virtualHosts."jelly.uninsane.org" = {
-    addSSL = true;
+    forceSSL = true;
     enableACME = true;
     # inherit kTLS;
 

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

@@ -12,7 +12,7 @@ in
   services.komga.port = 11319;  # chosen at random
 
   services.nginx.virtualHosts."komga.uninsane.org" = {
-    addSSL = true;
+    forceSSL = true;
     enableACME = true;
     locations."/" = {
       proxyPass = "http://127.0.0.1:${builtins.toString port}";

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

@@ -10,16 +10,21 @@ let
   uiPort = 1234;  # default ui port is 1234
   backendPort = 8536; # default backend port is 8536
   #^ i guess the "backend" port is used for federation?
-  pict-rs = pkgs.pict-rs.overrideAttrs (upstream: {
-    # as of v 0.4.2, all non-GIF video is forcibly transcoded.
-    # that breaks lemmy, because of the request latency.
-    # and it eats up hella CPU.
-    # pict-rs is iffy around video altogether: mp4 seems the best supported.
-    postPatch = (upstream.postPatch or "") + ''
-      substituteInPlace src/validate.rs \
-        --replace 'if transcode_options.needs_reencode() {' 'if false {'
-    '';
-  });
+  pict-rs = pkgs.pict-rs;
+  # pict-rs = pkgs.pict-rs.overrideAttrs (upstream: {
+  #   # as of v0.4.2, all non-GIF video is forcibly transcoded.
+  #   # that breaks lemmy, because of the request latency.
+  #   # and it eats up hella CPU.
+  #   # pict-rs is iffy around video altogether: mp4 seems the best supported.
+  #   # XXX: this patch no longer applies after 0.5.10 -> 0.5.11 update.
+  #   #      git log is hard to parse, but *suggests* that video is natively supported
+  #   #      better than in the 0.4.2 days, e.g. 5fd59fc5b42d31559120dc28bfef4e5002fb509e
+  #   #      "Change commandline flag to allow disabling video, since it is enabled by default"
+  #   postPatch = (upstream.postPatch or "") + ''
+  #     substituteInPlace src/validate.rs \
+  #       --replace 'if transcode_options.needs_reencode() {' 'if false {'
+  #   '';
+  # });
 in {
   services.lemmy = {
     enable = true;

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

@@ -89,6 +89,16 @@ in
         disable_symlinks on;
       '';
     };
+    locations."/share/Milkbags/" = {
+      alias = "/var/media/Videos/Milkbags/";
+      extraConfig = ''
+        # autoindex => render directory listings
+        autoindex on;
+        # don't follow any symlinks when serving files
+        # otherwise it allows a directory escape
+        disable_symlinks on;
+      '';
+    };
 
     # allow matrix users to discover that @user:uninsane.org is reachable via matrix.uninsane.org
     locations."= /.well-known/matrix/server".extraConfig =

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

@@ -25,7 +25,7 @@ in
 
     config :pleroma, Pleroma.Web.Endpoint,
       url: [host: "fed.uninsane.org", scheme: "https", port: 443],
-      http: [ip: {127, 0, 0, 1}, port: 4000]
+      http: [ip: {127, 0, 0, 1}, port: 4040]
     #   secret_key_base: "{secrets.pleroma.secret_key_base}",
     #   signing_salt: "{secrets.pleroma.signing_salt}"
 
@@ -167,7 +167,7 @@ in
     enableACME = true;
     # inherit kTLS;
     locations."/" = {
-      proxyPass = "http://127.0.0.1:4000";
+      proxyPass = "http://127.0.0.1:4040";
       recommendedProxySettings = true;
       # documented: https://git.pleroma.social/pleroma/pleroma/-/blob/develop/installation/pleroma.nginx
       extraConfig = ''

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

@@ -3,10 +3,17 @@
 #
 # config precedence (higher precedence overrules lower precedence):
 # - Default Values < Environment Variables < YAML Configuraiton File < Command Line Arguments
-{ config, lib, ... }:
+#
+# debugging:
+# - soulseek is just *flaky*. if you see e.g. DNS errors, even though you can't replicate them via `dig` or `getent ahostsv4`, just give it 10 minutes to work out:
+#   - "Soulseek.AddressException: Failed to resolve address 'vps.slsknet.org': Resource temporarily unavailable"
+{ config, lib, pkgs, ... }:
+
+# TODO: re-enable once i'm satisfied this isn't escaping the net sandbox
+lib.mkIf false
 {
   sane.persist.sys.byStore.plaintext = [
-    { user = "slskd"; group = "slskd"; path = "/var/lib/slskd"; method = "bind"; }
+    { user = "slskd"; group = "media"; path = "/var/lib/slskd"; method = "bind"; }
   ];
   sops.secrets."slskd_env" = {
     owner = config.users.users.slskd.name;
@@ -15,7 +22,7 @@
 
   users.users.slskd.extraGroups = [ "media" ];
 
-  sane.ports.ports."50000" = {
+  sane.ports.ports."50300" = {
     protocol = [ "tcp" ];
     # not visible to WAN: i run this in a separate netns
     visibleTo.ovpn = true;
@@ -28,12 +35,14 @@
     forceSSL = true;
     enableACME = true;
     locations."/" = {
-      proxyPass = "http://10.0.1.6:5001";
+      proxyPass = "http://10.0.1.6:5030";
       proxyWebsockets = true;
     };
   };
 
   services.slskd.enable = true;
+  services.slskd.domain = null;  # i'll manage nginx for it
+  services.slskd.group = "media";
   # env file, for auth (SLSKD_SLSK_PASSWORD, SLSKD_SLSK_USERNAME)
   services.slskd.environmentFile = config.sops.secrets.slskd_env.path;
   services.slskd.settings = {
@@ -62,13 +71,12 @@
     # flags.volatile = true;  # store searches and active transfers in RAM (completed transfers still go to disk). rec for btrfs/zfs
   };
 
-  systemd.services.slskd = {
-    serviceConfig = {
-      # run this behind the OVPN static VPN
-      NetworkNamespacePath = "/run/netns/ovpns";
-      Restart = lib.mkForce "always";  # exits "success" when it fails to connect to soulseek server
-      RestartSec = "60s";
-      Group = "media";
-    };
+  systemd.services.slskd.serviceConfig = {
+    # run this behind the OVPN static VPN
+    NetworkNamespacePath = "/run/netns/ovpns";
+    ExecStartPre = [ "${lib.getExe pkgs.sane-scripts.ip-check} --no-upnp --expect 185.157.162.178" ];  # abort if public IP is not as expected
+
+    Restart = lib.mkForce "always";  # exits "success" when it fails to connect to soulseek server
+    RestartSec = "60s";
   };
 }

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

@@ -22,6 +22,65 @@ let
         --replace-fail 'set(TR_USER_AGENT_PREFIX "''${TR_SEMVER}")' 'set(TR_USER_AGENT_PREFIX "3.00")'
     '';
   });
+  download-dir = "/var/media/torrents";
+  torrent-done = pkgs.writeShellApplication {
+    name = "torrent-done";
+    runtimeInputs = with pkgs; [
+      acl
+      coreutils
+      findutils
+      rsync
+      util-linux
+    ];
+    text = ''
+      destructive() {
+        if [ -n "''${TR_DRY_RUN-}" ]; then
+          echo "$*"
+        else
+          "$@"
+        fi
+      }
+      if [[ "$TR_TORRENT_DIR" =~ ^.*freeleech.*$ ]]; then
+        # freeleech torrents have no place in my permanent library
+        echo "freeleech: nothing to do"
+        exit 0
+      fi
+      if ! [[ "$TR_TORRENT_DIR" =~ ^${download-dir}/.*$ ]]; then
+        echo "unexpected torrent dir, aborting: $TR_TORRENT_DIR"
+        exit 0
+      fi
+
+      REL_DIR="''${TR_TORRENT_DIR#${download-dir}/}"
+      MEDIA_DIR="/var/media/$REL_DIR"
+
+      destructive mkdir -p "$(dirname "$MEDIA_DIR")"
+      destructive rsync -arv "$TR_TORRENT_DIR/" "$MEDIA_DIR/"
+      # make the media rwx by anyone in the group
+      destructive find "$MEDIA_DIR" -type d -exec setfacl --recursive --modify d:g::rwx,o::rx {} \;
+      destructive find "$MEDIA_DIR" -type d -exec chmod g+rw,a+rx {} \;
+
+      # if there's a single directory inside the media dir, then inline that
+      subdirs=("$MEDIA_DIR"/*)
+      if [ ''${#subdirs} -eq 1 ]; then
+        dirname="''${subdirs[0]}"
+        if [ -d "$dirname" ]; then
+          mv "$dirname"/* "$MEDIA_DIR/" && rmdir "$dirname"
+        fi
+      fi
+
+      # remove noisy files:
+      find "$MEDIA_DIR/" -type f \(\
+           -iname 'www.YTS.*.jpg' \
+        -o -iname 'WWW.YIFY*.COM.jpg' \
+        -o -iname 'YIFY*.com.txt' \
+        -o -iname 'YTS*.com.txt' \
+        \) -exec rm {} \;
+
+      # dedupe the whole media library.
+      # yeah, a bit excessive: move this to a cron job if that's problematic.
+      destructive hardlink /var/media --reflink=always --ignore-time --verbose
+    '';
+  };
 in
 {
   sane.persist.sys.byStore.plaintext = [
@@ -46,8 +105,8 @@ in
     # DOCUMENTATION/options list: <https://github.com/transmission/transmission/blob/main/docs/Editing-Configuration-Files.md#options>
 
     # message-level = 3;  #< enable for debug logging. 0-3, default is 2.
-    # 0.0.0.0 => allow rpc from any host: we gate it via firewall and auth requirement
-    rpc-bind-address = "0.0.0.0";
+    # 10.0.1.6 => allow rpc only from the root servo ns. it'll tunnel things to the net, if need be.
+    rpc-bind-address = "10.0.1.6";
     #rpc-host-whitelist = "bt.uninsane.org";
     #rpc-whitelist = "*.*.*.*";
     rpc-authentication-required = true;
@@ -57,6 +116,10 @@ in
     rpc-password = "{503fc8928344f495efb8e1f955111ca5c862ce0656SzQnQ5";
     rpc-whitelist-enabled = false;
 
+    # force behind ovpns in case the NetworkNamespace fails somehow
+    bind-address-ipv4 = "185.157.162.178";
+    port-forwarding-enabled = false;
+
     # hopefully, make the downloads world-readable
     # umask = 0;  #< default is 2: i.e. deny writes from world
 
@@ -72,11 +135,23 @@ in
     # see: https://git.zknt.org/mirror/transmission/commit/cfce6e2e3a9b9d31a9dafedd0bdc8bf2cdb6e876?lang=bg-BG
     anti-brute-force-enabled = false;
 
-    download-dir = "/var/media";
-    incomplete-dir = "/var/media/incomplete";
+    inherit download-dir;
+    incomplete-dir = "${download-dir}/incomplete";
     # transmission regularly fails to move stuff from the incomplete dir to the main one, so disable:
-    # TODO: uncomment this line!
     incomplete-dir-enabled = false;
+
+    # env vars available in script:
+    # - TR_APP_VERSION - Transmission's short version string, e.g. `4.0.0`
+    # - TR_TIME_LOCALTIME
+    # - TR_TORRENT_BYTES_DOWNLOADED - Number of bytes that were downloaded for this torrent
+    # - TR_TORRENT_DIR - Location of the downloaded data
+    # - TR_TORRENT_HASH - The torrent's info hash
+    # - TR_TORRENT_ID
+    # - TR_TORRENT_LABELS - A comma-delimited list of the torrent's labels
+    # - TR_TORRENT_NAME - Name of torrent (not filename)
+    # - TR_TORRENT_TRACKERS - A comma-delimited list of the torrent's trackers' announce URLs
+    script-torrent-done-enabled = true;
+    script-torrent-done-filename = "${torrent-done}/bin/torrent-done";
   };
 
   systemd.services.transmission.after = [ "wireguard-wg-ovpns.service" ];
@@ -84,8 +159,11 @@ in
   systemd.services.transmission.serviceConfig = {
     # run this behind the OVPN static VPN
     NetworkNamespacePath = "/run/netns/ovpns";
+    ExecStartPre = [ "${lib.getExe pkgs.sane-scripts.ip-check} --no-upnp --expect 185.157.162.178" ];  # abort if public IP is not as expected
+
     Restart = "on-failure";
     RestartSec = "30s";
+    BindPaths = [ "/var/media" ];  #< so it can move completed torrents into the media library
   };
 
   # service to automatically backup torrents i add to transmission

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

@@ -2,19 +2,11 @@
 { config, lib, pkgs, ... }:
 
 let
+  dyn-dns = config.sane.services.dyn-dns;
   nativeAddrs = lib.mapAttrs (_name: builtins.head) config.sane.dns.zones."uninsane.org".inet.A;
   bindOvpn = "10.0.1.5";
-in lib.mkMerge [
+in
 {
-  services.trust-dns.enable = true;
-
-  # don't bind to IPv6 until i explicitly test that stack
-  services.trust-dns.settings.listen_addrs_ipv6 = [];
-  services.trust-dns.quiet = true;
-  # FIXME(2023/11/26): services.trust-dns.debug doesn't log requests: use RUST_LOG=debug env for that.
-  # - see: <https://github.com/hickory-dns/hickory-dns/issues/2082>
-  # services.trust-dns.debug = true;
-
   sane.ports.ports."53" = {
     protocol = [ "udp" "tcp" ];
     visibleTo.lan = true;
@@ -66,23 +58,6 @@ in lib.mkMerge [
 
   services.trust-dns.settings.zones = [ "uninsane.org" ];
 
-  # TODO: can i transform this into some sort of service group?
-  # have `systemctl restart trust-dns.service` restart all the individual services?
-  systemd.services.trust-dns.serviceConfig = {
-    DynamicUser = lib.mkForce false;
-    User = "trust-dns";
-    Group = "trust-dns";
-    wantedBy = lib.mkForce [];
-  };
-  systemd.services.trust-dns.enable = false;
-
-  users.groups.trust-dns = {};
-  users.users.trust-dns = {
-    group = "trust-dns";
-    isSystemUser = true;
-  };
-
-  # sane.services.dyn-dns.restartOnChange = [ "trust-dns.service" ];
 
   networking.nat.enable = true;
   networking.nat.extraCommands = ''
@@ -107,98 +82,73 @@ in lib.mkMerge [
     visibleTo.lan = true;
     description = "colin-redirected-dns-for-lan-namespace";
   };
-}
-{
-  systemd.services =
-    let
-      sed = "${pkgs.gnused}/bin/sed";
-      stateDir = "/var/lib/trust-dns";
-      zoneTemplate = pkgs.writeText "uninsane.org.zone.in" config.sane.dns.zones."uninsane.org".rendered;
 
-      zoneDirFor = flavor: "${stateDir}/${flavor}";
-      zoneFor = flavor: "${zoneDirFor flavor}/uninsane.org.zone";
-      mkTrustDnsService = opts: flavor: let
-        flags = let baseCfg = config.services.trust-dns; in
-          (lib.optional baseCfg.debug "--debug") ++ (lib.optional baseCfg.quiet "--quiet");
-        flagsStr = builtins.concatStringsSep " " flags;
 
-        anative = nativeAddrs."servo.${flavor}";
-
-        toml = pkgs.formats.toml { };
-        configTemplate = opts.config or (toml.generate "trust-dns-${flavor}.toml" (
-          (
-            lib.filterAttrsRecursive (_: v: v != null) config.services.trust-dns.settings
-          ) // {
-            listen_addrs_ipv4 = opts.listen or [ anative ];
-          }
-        ));
-        configFile = "${stateDir}/${flavor}-config.toml";
-
-        port = opts.port or 53;
-      in {
-        description = "trust-dns Domain Name Server (serving ${flavor})";
-        unitConfig.Documentation = "https://trust-dns.org/";
-
-        preStart = ''
-          wan=$(cat '${config.sane.services.dyn-dns.ipPath}')
-          ${sed} s/%AWAN%/$wan/ ${configTemplate} > ${configFile}
-        '' + lib.optionalString (!opts ? config) ''
-          mkdir -p ${zoneDirFor flavor}
-          ${sed} \
-            -e s/%CNAMENATIVE%/servo.${flavor}/ \
-            -e s/%ANATIVE%/${anative}/ \
-            -e s/%AWAN%/$wan/ \
-            -e s/%AOVPNS%/185.157.162.178/ \
-            ${zoneTemplate} > ${zoneFor flavor}
-        '';
-        serviceConfig = config.systemd.services.trust-dns.serviceConfig // {
-          ExecStart = ''
-            ${pkgs.trust-dns}/bin/${pkgs.trust-dns.meta.mainProgram} \
-            --port ${builtins.toString port} \
-            --zonedir ${zoneDirFor flavor}/ \
-            --config ${configFile} ${flagsStr}
-          '';
-        };
-
-        after = [ "network.target" ];
-        wantedBy = [ "multi-user.target" ];
-      };
-    in {
-      trust-dns-wan = mkTrustDnsService { listen = [ nativeAddrs."servo.lan" bindOvpn ]; } "wan";
-      trust-dns-lan = mkTrustDnsService { port = 1053; } "lan";
-      trust-dns-hn = mkTrustDnsService { port = 1053; } "hn";
-      trust-dns-hn-resolver = mkTrustDnsService {
-        config = pkgs.writeText "hn-resolver-config.toml" ''
-          # i host a resolver in the wireguard VPN so that clients can resolve DNS through the VPN.
-          # (that's what this file achieves).
-          #
-          # one would expect this resolver could host the authoritative zone for `uninsane.org`, and then forward everything else to the system resolver...
-          # and while that works for `dig`, it breaks for `nslookup` (and so `ssh`, etc).
-          #
-          # DNS responses include a flag for if the responding server is the authority of the zone queried.
-          # it seems that default Linux stub resolvers either:
-          # - expect DNSSEC when the response includes that bit, or
-          # - expect A records to be in the `answer` section instead of `additional` section.
-          # or perhaps something more nuanced. but for `nslookup` to be reliable, it has to talk to an
-          # instance of trust-dns which is strictly a resolver, with no authority.
-          # hence, this config: a resolver which forwards to the actual authority.
-
-          listen_addrs_ipv4 = ["${nativeAddrs."servo.hn"}"]
-          listen_addrs_ipv6 = []
-
-          [[zones]]
-          zone = "uninsane.org"
-          zone_type = "Forward"
-          stores = { type = "forward", name_servers = [{ socket_addr = "${nativeAddrs."servo.hn"}:1053", protocol = "udp", trust_nx_responses = true }] }
-
-          [[zones]]
-          # forward the root zone to the local DNS resolver
-          zone = "."
-          zone_type = "Forward"
-          stores = { type = "forward", name_servers = [{ socket_addr = "127.0.0.53:53", protocol = "udp", trust_nx_responses = true }] }
-        '';
-      } "hn-resolver";
+  sane.services.trust-dns.enable = true;
+  sane.services.trust-dns.instances = let
+    mkSubstitutions = flavor: {
+      "%AWAN%" = "$(cat '${dyn-dns.ipPath}')";
+      "%CNAMENATIVE%" = "servo.${flavor}";
+      "%ANATIVE%" = nativeAddrs."servo.${flavor}";
+      "%AOVPNS%" = "185.157.162.178";
     };
+  in
+  {
+    wan = {
+      substitutions = mkSubstitutions "wan";
+      listenAddrs = [
+        nativeAddrs."servo.lan"
+        bindOvpn
+      ];
+    };
+    lan = {
+      substitutions = mkSubstitutions "lan";
+      listenAddrs = [ nativeAddrs."servo.lan" ];
+      port = 1053;
+    };
+    hn = {
+      substitutions = mkSubstitutions "hn";
+      listenAddrs = [ nativeAddrs."servo.hn" ];
+      port = 1053;
+    };
+    hn-resolver = {
+      # don't need %AWAN% here because we forward to the hn instance.
+      listenAddrs = [ nativeAddrs."servo.hn" ];
+      extraConfig = {
+        zones = [
+          {
+            zone = "uninsane.org";
+            zone_type = "Forward";
+            stores = {
+              type = "forward";
+              name_servers = [
+                {
+                  socket_addr = "${nativeAddrs."servo.hn"}:1053";
+                  protocol = "udp";
+                  trust_nx_responses = true;
+                }
+              ];
+            };
+          }
+          {
+            # forward the root zone to the local DNS resolver
+            zone = ".";
+            zone_type = "Forward";
+            stores = {
+              type = "forward";
+              name_servers = [
+                {
+                  socket_addr = "127.0.0.53:53";
+                  protocol = "udp";
+                  trust_nx_responses = true;
+                }
+              ];
+            };
+          }
+        ];
+      };
+    };
+  };
 
   sane.services.dyn-dns.restartOnChange = [
     "trust-dns-wan.service"
@@ -207,4 +157,3 @@ in lib.mkMerge [
     # "trust-dns-hn-resolver.service"  # doesn't need restart because it doesn't know about WAN IP
   ];
 }
-]

hosts/common/feeds.nix

@@ -81,10 +81,14 @@ let
     (fromDb "feeds.simplecast.com/xKJ93w_w" // uncat)  # Atlas Obscura
     (fromDb "feeds.transistor.fm/acquired" // tech)
     (fromDb "fulltimenix.com" // tech)
+    (fromDb "futureofcoding.org/episodes" // tech)
+    (fromDb "hackerpublicradio.org" // tech)
     (fromDb "lexfridman.com/podcast" // rat)
     (fromDb "mapspodcast.libsyn.com" // uncat)  # Multidisciplinary Association for Psychedelic Studies
+    (fromDb "microarch.club" // tech)
     (fromDb "omegataupodcast.net" // tech)  # 3/4 German; 1/4 eps are English
     (fromDb "omny.fm/shows/cool-people-who-did-cool-stuff" // pol)  # Maggie Killjoy -- referenced by Cory Doctorow
+    (fromDb "omny.fm/shows/money-stuff-the-podcast")  # Matt Levine
     (fromDb "omny.fm/shows/the-dollop-with-dave-anthony-and-gareth-reynolds")  # The Dollop history/comedy
     (fromDb "originstories.libsyn.com" // uncat)
     (fromDb "podcast.posttv.com/itunes/post-reports.xml" // pol)
@@ -100,9 +104,12 @@ let
     (fromDb "sharkbytes.transistor.fm" // tech)  # Wireshark Podcast o_0
     (fromDb "sscpodcast.libsyn.com" // rat)  # Astral Codex Ten
     (fromDb "talesfromthebridge.buzzsprout.com" // tech)  # Sci-Fi? has Peter Watts; author of No Moods, Ads or Cutesy Fucking Icons (rifters.com)
+    (fromDb "theamphour.com" // tech)
+    (fromDb "techtalesshow.com" // tech)  # Corbin Davenport
     (fromDb "techwontsave.us" // pol)  # rec by Cory Doctorow
     (fromDb "wakingup.libsyn.com" // pol)  # Sam Harris
     (fromDb "werenotwrong.fireside.fm" // pol)
+    (mkPod "https://sfconservancy.org/casts/the-corresponding-source/feeds/ogg/" // tech)
 
     # (fromDb "feeds.libsyn.com/421877" // rat)  # Less Wrong Curated
     # (fromDb "feeds.megaphone.fm/hubermanlab" // uncat)  # Daniel Huberman on sleep
@@ -122,11 +129,11 @@ let
     (fromDb "acoup.blog/feed")  # history, states. author: <https://historians.social/@bretdevereaux/following>
     (fromDb "amosbbatto.wordpress.com" // tech)
     (fromDb "anish.lakhwara.com" // tech)
+    (fromDb "apenwarr.ca/log/rss.php" // tech)  # CEO of tailscale
     (fromDb "applieddivinitystudies.com" // rat)
     (fromDb "artemis.sh" // tech)
     (fromDb "ascii.textfiles.com" // tech)  # Jason Scott
     (fromDb "austinvernon.site" // tech)
-    # (fromDb "balajis.com" // pol)  # Balaji
     (fromDb "ben-evans.com/benedictevans" // pol)
     (fromDb "bitbashing.io" // tech)
     (fromDb "bitsaboutmoney.com" // uncat)
@@ -137,20 +144,19 @@ let
     (fromDb "blog.thalheim.io" // tech)  # Mic92
     (fromDb "bunniestudios.com" // tech)  # Bunnie Juang
     (fromDb "capitolhillseattle.com" // pol)
-    # (fromDb "drewdevault.com" // tech)
-    # (fromDb "econlib.org" // pol)
     (fromDb "edwardsnowden.substack.com" // pol // text)
     (fromDb "fasterthanli.me" // tech)
     (fromDb "gwern.net" // rat)
+    (fromDb "hardcoresoftware.learningbyshipping.com" // tech)  # Steven Sinofsky
     (fromDb "harihareswara.net" // tech // pol)  # rec by Cory Doctorow
     (fromDb "ianthehenry.com" // tech)
     (fromDb "idiomdrottning.org" // uncat)
     (fromDb "interconnected.org/home/feed" // rat)  # Matt Webb -- engineering-ish, but dreamy
     (fromDb "jeffgeerling.com" // tech)
     (fromDb "jefftk.com" // tech)
+    (fromDb "jwz.org/blog" // tech // pol)  # DNA lounge guy, loooong-time blogger
     (fromDb "kill-the-newsletter.com/feeds/joh91bv7am2pnznv.xml" // pol)  # Matt Levine - Money Stuff
     (fromDb "kosmosghost.github.io/index.xml" // tech)
-    # (fromDb "lesswrong.com" // rat)
     (fromDb "linmob.net" // tech)
     (fromDb "lwn.net" // tech)
     (fromDb "lynalden.com" // pol)
@@ -158,19 +164,20 @@ let
     (fromDb "mg.lol" // tech)
     (fromDb "mindingourway.com" // rat)
     (fromDb "morningbrew.com/feed" // pol)
+    (fromDb "nixpkgs.news" // tech)
     (fromDb "overcomingbias.com" // rat)  # Robin Hanson
     (fromDb "palladiummag.com" // uncat)
     (fromDb "philosopher.coach" // rat)  # Peter Saint-Andre -- side project of stpeter.im
     (fromDb "pomeroyb.com" // tech)
     (fromDb "postmarketos.org/blog" // tech)
     (fromDb "preposterousuniverse.com" // rat)  # Sean Carroll
-    (fromDb "profectusmag.com" // uncat)
     (fromDb "project-insanity.org" // tech)  # shared blog by a few NixOS devs, notably onny
     (fromDb "putanumonit.com" // rat)  # mostly dating topics. not advice, or humor, but looking through a social lens
     (fromDb "richardcarrier.info" // rat)
     (fromDb "rifters.com/crawl" // uncat)  # No Moods, Ads or Cutesy Fucking Icons
     (fromDb "righto.com" // tech)  # Ken Shirriff
     (fromDb "rootsofprogress.org" // rat)  # Jason Crawford
+    (fromDb "samuel.dionne-riel.com" // tech)  # SamuelDR
     (fromDb "sagacioussuricata.com" // tech)  # ian (Sanctuary)
     (fromDb "semiaccurate.com" // tech)
     (fromDb "sideways-view.com" // rat)  # Paul Christiano
@@ -179,31 +186,40 @@ let
     (fromDb "spectrum.ieee.org" // tech)
     (fromDb "stpeter.im/atom.xml" // pol)
     (fromDb "thediff.co" // pol)  # Byrne Hobart
-    # (fromDb "theregister.com" // tech)
     (fromDb "thisweek.gnome.org" // tech)
     (fromDb "tuxphones.com" // tech)
     (fromDb "uninsane.org" // tech)
     (fromDb "unintendedconsequenc.es" // rat)
-    # (fromDb "vitalik.ca" // tech)  # moved to vitalik.eth.limo
     (fromDb "vitalik.eth.limo" // tech)  # Vitalik Buterin
-    # (fromDb "webcurious.co.uk" // uncat)  # link aggregator; defunct?
+    (fromDb "willow.phantoma.online")  # wizard@xyzzy.link
     (fromDb "xn--gckvb8fzb.com" // tech)
     (mkSubstack "astralcodexten" // rat // daily)  # Scott Alexander
-    # (mkSubstack "doomberg" // tech // weekly)  # articles are all pay-walled
     (mkSubstack "eliqian" // rat // weekly)
     (mkSubstack "oversharing" // pol // daily)
     (mkSubstack "samkriss" // humor // infrequent)
     (mkText "http://benjaminrosshoffman.com/feed" // pol // weekly)
     (mkText "http://boginjr.com/feed" // tech // infrequent)
     (mkText "https://forum.merveilles.town/rss.xml" // pol // infrequent)  #quality RSS list here: <https://forum.merveilles.town/thread/57/share-your-rss-feeds%21-6/>
-    # (mkText "https://github.com/Kaiteki-Fedi/Kaiteki/commits/master.atom" // tech // infrequent)
     (mkText "https://jvns.ca/atom.xml" // tech // weekly)  # Julia Evans
     (mkText "https://linuxphoneapps.org/blog/atom.xml" // tech // infrequent)
     (mkText "https://nixos.org/blog/announcements-rss.xml" // tech // infrequent)  # more nixos stuff here, but unclear how to subscribe: <https://nixos.org/blog/categories.html>
     (mkText "https://nixos.org/blog/stories-rss.xml" // tech // weekly)
+    (mkText "https://solar.lowtechmagazine.com/posts/index.xml" // tech // weekly)
+    (mkText "https://www.stratechery.com/rss" // pol // weekly)  # Ben Thompson
+
+    # (fromDb "balajis.com" // pol)  # Balaji
+    # (fromDb "drewdevault.com" // tech)
+    # (fromDb "econlib.org" // pol)
+    # (fromDb "lesswrong.com" // rat)
+    # (fromDb "profectusmag.com" // pol)  # some conservative/libertarian think tank
+    # (fromDb "thesideview.co" // uncat)  # spiritual journal; RSS items are stubs
+    # (fromDb "theregister.com" // tech)
+    # (fromDb "vitalik.ca" // tech)  # moved to vitalik.eth.limo
+    # (fromDb "webcurious.co.uk" // uncat)  # link aggregator; defunct?
+    # (mkSubstack "doomberg" // tech // weekly)  # articles are all pay-walled
+    # (mkText "https://github.com/Kaiteki-Fedi/Kaiteki/commits/master.atom" // tech // infrequent)
     # (mkText "https://til.simonwillison.net/tils/feed.atom" // tech // weekly)
     # (mkText "https://www.bloomberg.com/opinion/authors/ARbTQlRLRjE/matthew-s-levine.rss" // pol // weekly)  # Matt Levine (preview/paywalled)
-    (mkText "https://www.stratechery.com/rss" // pol // weekly)  # Ben Thompson
   ];
 
   videos = [
@@ -215,17 +231,19 @@ let
     (fromDb "youtube.com/@JackStauber")
     (fromDb "youtube.com/@NativLang")
     (fromDb "youtube.com/@PolyMatter")
-    # (fromDb "youtube.com/@rossmanngroup" // pol // tech)  # Louis Rossmann
     (fromDb "youtube.com/@TechnologyConnections" // tech)
     (fromDb "youtube.com/@TheB1M")
     (fromDb "youtube.com/@TomScottGo")
     (fromDb "youtube.com/@Vihart")
     (fromDb "youtube.com/@Vox")
     (fromDb "youtube.com/@Vsauce")
+
+    # (fromDb "youtube.com/@rossmanngroup" // pol // tech)  # Louis Rossmann
   ];
 
   images = [
     (fromDb "catandgirl.com" // img // humor)
+    (fromDb "davidrevoy.com" // img // art)
     (fromDb "miniature-calendar.com" // img // art // daily)
     (fromDb "pbfcomics.com" // img // humor)
     (fromDb "poorlydrawnlines.com/feed" // img // humor)

hosts/common/fs.nix

@@ -2,7 +2,7 @@
 # - x-systemd options: <https://www.freedesktop.org/software/systemd/man/systemd.mount.html>
 # - fuse options: `man mount.fuse`
 
-{ lib, pkgs, sane-lib, ... }:
+{ config, lib, pkgs, sane-lib, utils, ... }:
 
 let
   fsOpts = rec {
@@ -23,15 +23,15 @@ let
     # N.B.: `remote-fs.target` is a dependency of multi-user.target, itself of graphical.target.
     # hence, omitting `noauto` can slow down boots.
     noauto = [ "noauto" ];
-    # lazyMount: defer mounting until first access from userspace
+    # lazyMount: defer mounting until first access from userspace.
+    # see: `man systemd.automount`, `man automount`, `man autofs`
     lazyMount = noauto ++ automount;
     wg = [
       "x-systemd.requires=wireguard-wg-home.service"
       "x-systemd.after=wireguard-wg-home.service"
     ];
 
-    ssh = common ++ [
-      "identityfile=/home/colin/.ssh/id_ed25519"
+    fuse = [
       "allow_other"  # allow users other than the one who mounts it to access it. needed, if systemd is the one mounting this fs (as root)
       # allow_root: allow root to access files on this fs (if mounted by non-root, else it can always access them).
       #             N.B.: if both allow_root and allow_other are specified, then only allow_root takes effect.
@@ -44,7 +44,18 @@ let
       # with default_permissions, sshfs doesn't tunnel file ops from users until checking that said user could perform said op on an equivalent local fs.
       "default_permissions"
     ];
-    sshColin = ssh ++ [
+    fuseColin = fuse ++ [
+      "uid=1000"
+      "gid=100"
+    ];
+
+    ssh = common ++ fuse ++ [
+      "identityfile=/home/colin/.ssh/id_ed25519"
+      # i *think* idmap=user means that `colin` on `localhost` and `colin` on the remote are actually treated as the same user, even if their uid/gid differs?
+      # i.e., local colin's id is translated to/from remote colin's id on every operation?
+      "idmap=user"
+    ];
+    sshColin = ssh ++ fuseColin ++ [
       # follow_symlinks: remote files which are symlinks are presented to the local system as ordinary files (as the target of the symlink).
       #                  if the symlink target does not exist, the presentation is unspecified.
       #                  symlinks which point outside the mount ARE followed. so this is more capable than `transform_symlinks`
@@ -52,9 +63,6 @@ let
       # symlinks on the remote fs which are absolute paths are presented to the local system as relative symlinks pointing to the expected data on the remote fs.
       # only symlinks which would point inside the mountpoint are translated.
       "transform_symlinks"
-      "idmap=user"
-      "uid=1000"
-      "gid=100"
     ];
     # sshRoot = ssh ++ [
     #   # we don't transform_symlinks because that breaks the validity of remote /nix stores
@@ -67,21 +75,44 @@ let
     # actimeo=n  = how long (in seconds) to cache file/dir attributes (default: 3-60s)
     # bg         = retry failed mounts in the background
     # retry=n    = for how many minutes `mount` will retry NFS mount operation
+    # intr       = allow Ctrl+C to abort I/O (it will error with `EINTR`)
     # soft       = on "major timeout", report I/O error to userspace
+    # softreval  = on "major timeout", service the request using known-stale cache results instead of erroring -- if such cache data exists
     # retrans=n  = how many times to retry a NFS request before giving userspace a "server not responding" error (default: 3)
     # timeo=n    = number of *deciseconds* to wait for a response before retrying it (default: 600)
     #              note: client uses a linear backup, so the second request will have double this timeout, then triple, etc.
+    # proto=udp  = encapsulate protocol ops inside UDP packets instead of a TCP session.
+    #              requires `nfsvers=3` and a kernel compiled with `NFS_DISABLE_UDP_SUPPORT=n`.
+    #              UDP might be preferable to TCP because the latter is liable to hang for ~100s (kernel TCP timeout) after a link drop.
+    #              however, even UDP has issues with `umount` hanging.
+    #
+    # N.B.: don't change these without first testing the behavior of sandboxed apps on a flaky network.
     nfs = common ++ [
-      # "actimeo=10"
-      "bg"
-      "retrans=4"
+      # "actimeo=5"
+      # "bg"
+      "retrans=1"
       "retry=0"
+      # "intr"
       "soft"
-      "timeo=15"
+      "softreval"
+      "timeo=30"
       "nofail"  # don't fail remote-fs.target when this mount fails  (not an option for sshfs else would be common)
+      # "proto=udp"  # default kernel config doesn't support NFS over UDP: <https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1964093> (see comment 11).
+      # "nfsvers=3"  # NFSv4+ doesn't support UDP at *all*. it's ok to omit nfsvers -- server + client will negotiate v3 based on udp requirement. but omitting causes confusing mount errors when the server is *offline*, because the client defaults to v4 and thinks the udp option is a config error.
+      # "x-systemd.idle-timeout=10"  # auto-unmount after this much inactivity
+    ];
+
+    # manually perform a ftp mount via e.g.
+    #   curlftpfs -o ftpfs_debug=2,user=anonymous:anonymous,connect_timeout=10 -f -s ftp://servo-hn /mnt/my-ftp
+    ftp = common ++ fuseColin ++ [
+      # "ftpfs_debug=2"
+      "user=colin:ipauth"
+      # connect_timeout=10: casting shows to T.V. fails partway through about half the time
+      "connect_timeout=20"
     ];
   };
   remoteHome = host: {
+    sane.programs.sshfs-fuse.enableFor.system = true;
     fileSystems."/mnt/${host}/home" = {
       device = "colin@${host}:/home/colin";
       fsType = "fuse.sshfs";
@@ -94,6 +125,54 @@ let
       dir.acl.mode = "0700";
     };
   };
+  remoteServo = subdir: {
+    sane.programs.curlftpfs.enableFor.system = true;
+    sane.fs."/mnt/servo/${subdir}" = sane-lib.fs.wanted {
+      dir.acl.user = "colin";
+      dir.acl.group = "users";
+      dir.acl.mode = "0750";
+    };
+    fileSystems."/mnt/servo/${subdir}" = {
+      device = "ftp://servo-hn:/${subdir}";
+      noCheck = true;
+      fsType = "fuse.curlftpfs";
+      options = fsOpts.ftp ++ fsOpts.noauto ++ fsOpts.wg;
+      # fsType = "nfs";
+      # options = fsOpts.nfs ++ fsOpts.lazyMount ++ fsOpts.wg;
+    };
+    systemd.services."automount-servo-${utils.escapeSystemdPath subdir}" = let
+      fs = config.fileSystems."/mnt/servo/${subdir}";
+    in {
+      # this is a *flaky* network mount, especially on moby.
+      # if done as a normal autofs mount, access will eternally block when network is dropped.
+      # notably, this would block *any* sandboxed app which allows media access, whether they actually try to use that media or not.
+      # a practical solution is this: mount as a service -- instead of autofs -- and unmount on timeout error, in a restart loop.
+      # until the ftp handshake succeeds, nothing is actually mounted to the vfs, so this doesn't slow down any I/O when network is down.
+      description = "automount /mnt/servo/${subdir} in a fault-tolerant and non-blocking manner";
+      after = [ "network-online.target" ];
+      requires = [ "network-online.target" ];
+      wantedBy = [ "default.target" ];
+
+      serviceConfig.Type = "simple";
+      serviceConfig.ExecStart = lib.escapeShellArgs [
+        "/usr/bin/env"
+        "PATH=/run/current-system/sw/bin"
+        "mount.${fs.fsType}"
+        "-f"  # foreground (i.e. don't daemonize)
+        "-s"  # single-threaded (TODO: it's probably ok to disable this?)
+        "-o"
+        (lib.concatStringsSep "," (lib.filter (o: !lib.hasPrefix "x-systemd." o) fs.options))
+        fs.device
+        "/mnt/servo/${subdir}"
+      ];
+      # not sure if this configures a linear, or exponential backoff.
+      # but the first restart will be after `RestartSec`, and the n'th restart (n = RestartSteps) will be RestartMaxDelaySec after the n-1'th exit.
+      serviceConfig.Restart = "always";
+      serviceConfig.RestartSec = "10s";
+      serviceConfig.RestartMaxDelaySec = "120s";
+      serviceConfig.RestartSteps = "5";
+    };
+  };
 in
 lib.mkMerge [
   {
@@ -128,35 +207,6 @@ lib.mkMerge [
     # but it decreases working memory under the heaviest of loads by however much space the compressed memory occupies (e.g. 50% if 2:1; 25% if 4:1)
     zramSwap.memoryPercent = 100;
 
-    # fileSystems."/mnt/servo-nfs" = {
-    #   device = "servo-hn:/";
-    #   noCheck = true;
-    #   fsType = "nfs";
-    #   options = fsOpts.nfs ++ fsOpts.automount ++ fsOpts.wg;
-    # };
-    fileSystems."/mnt/servo/media" = {
-      device = "servo-hn:/media";
-      noCheck = true;
-      fsType = "nfs";
-      options = fsOpts.nfs ++ fsOpts.lazyMount ++ fsOpts.wg;
-    };
-    sane.fs."/mnt/servo/media" = sane-lib.fs.wanted {
-      dir.acl.user = "colin";
-      dir.acl.group = "users";
-      dir.acl.mode = "0750";
-    };
-    fileSystems."/mnt/servo/playground" = {
-      device = "servo-hn:/playground";
-      noCheck = true;
-      fsType = "nfs";
-      options = fsOpts.nfs ++ fsOpts.lazyMount ++ fsOpts.wg;
-    };
-    sane.fs."/mnt/servo/playground" = sane-lib.fs.wanted {
-      dir.acl.user = "colin";
-      dir.acl.group = "users";
-      dir.acl.mode = "0750";
-    };
-
     # environment.pathsToLink = [
     #   # needed to achieve superuser access for user-mounted filesystems (see sshRoot above)
     #   # we can only link whole directories here, even though we're only interested in pkgs.openssh
@@ -164,13 +214,23 @@ lib.mkMerge [
     # ];
 
     programs.fuse.userAllowOther = true;  #< necessary for `allow_other` or `allow_root` options.
-    environment.systemPackages = [
-      pkgs.sshfs-fuse
-    ];
   }
 
   (remoteHome "desko")
   (remoteHome "lappy")
   (remoteHome "moby")
+  # this granularity of servo media mounts is necessary to support sandboxing:
+  # for flaky mounts, we can only bind the mountpoint itself into the sandbox,
+  # so it's either this or unconditionally bind all of media/.
+  (remoteServo "media/archive")
+  (remoteServo "media/Books")
+  (remoteServo "media/collections")
+  # (remoteServo "media/datasets")
+  (remoteServo "media/games")
+  (remoteServo "media/Music")
+  (remoteServo "media/Pictures/macros")
+  (remoteServo "media/torrents")
+  (remoteServo "media/Videos")
+  (remoteServo "playground")
 ]
 

hosts/common/hardware/default.nix

@@ -35,6 +35,16 @@
   # servo needs zfs though, which doesn't support every kernel.
   boot.kernelPackages = lib.mkDefault pkgs.zfs.latestCompatibleLinuxPackages;
 
+  # TODO: remove after linux 6.9. see: <https://github.com/axboe/liburing/issues/1113>
+  # - <https://github.com/neovim/neovim/issues/28149>
+  # - <https://git.kernel.dk/cgit/linux/commit/?h=io_uring-6.9&id=e5444baa42e545bb929ba56c497e7f3c73634099>
+  # when removing, try starting and suspending (ctrl+z) two instances of neovim simultaneously.
+  # if the system doesn't freeze, then this is safe to remove.
+  # added 2024-04-04
+  sane.user.fs.".profile".symlink.text = lib.mkBefore ''
+    export UV_USE_IO_URING=0
+  '';
+
   # hack in the `boot.shell_on_fail` arg since that doesn't always seem to work.
   boot.initrd.preFailCommands = "allowShell=1";
 

hosts/common/home/xdg-dirs.nix

@@ -3,13 +3,18 @@
 {
   # XDG defines things like ~/Desktop, ~/Downloads, etc.
   # these clutter the home, so i mostly don't use them.
+  # note that several of these are not actually standardized anywhere.
+  # some are even non-conventional, like:
+  # - XDG_PHOTOS_DIR: only works because i patch e.g. megapixels
   sane.user.fs.".config/user-dirs.dirs".symlink.text = ''
     XDG_DESKTOP_DIR="$HOME/.xdg/Desktop"
     XDG_DOCUMENTS_DIR="$HOME/dev"
     XDG_DOWNLOAD_DIR="$HOME/tmp"
     XDG_MUSIC_DIR="$HOME/Music"
+    XDG_PHOTOS_DIR="$HOME/Pictures/Photos"
     XDG_PICTURES_DIR="$HOME/Pictures"
     XDG_PUBLICSHARE_DIR="$HOME/.xdg/Public"
+    XDG_SCREENSHOTS_DIR="$HOME/Pictures/Screenshots"
     XDG_TEMPLATES_DIR="$HOME/.xdg/Templates"
     XDG_VIDEOS_DIR="$HOME/Videos"
   '';
@@ -17,4 +22,12 @@
   # prevent `xdg-user-dirs-update` from overriding/updating our config
   # see <https://manpages.ubuntu.com/manpages/bionic/man5/user-dirs.conf.5.html>
   sane.user.fs.".config/user-dirs.conf".symlink.text = "enabled=False";
+
+  sane.user.fs.".profile".symlink.text = ''
+    # configure XDG_<type>_DIR preferences (e.g. for downloads, screenshots, etc)
+    # surround with `set -o allexport` since user-dirs.dirs doesn't `export` its vars
+    set -a
+    source $HOME/.config/user-dirs.dirs
+    set +a
+  '';
 }

hosts/common/net/default.nix

@@ -60,8 +60,5 @@
   networking.networkmanager.plugins = lib.mkForce [];
 
   # keyfile.path = where networkmanager should look for connection credentials
-  networking.networkmanager.extraConfig = ''
-    [keyfile]
-    path=/var/lib/NetworkManager/system-connections
-  '';
+  networking.networkmanager.settings.keyfile.path = "/var/lib/NetworkManager/system-connections";
 }

hosts/common/net/dns.nix

@@ -19,30 +19,40 @@
 #
 # namespacing:
 # - each namespace can use a different /etc/resolv.conf to specify different DNS servers (see `firejail --dns=...`)
-# - nscd breaks namespacing: the host nscd is unaware of the guest's /etc/resolv.conf, and so direct's the guest's DNS requests to the host's servers.
+# - nscd breaks namespacing: the host nscd is unaware of the guest's /etc/resolv.conf, and so directs the guest's DNS requests to the host's servers.
 #   - this is fixed by either `firejail --blacklist=/var/run/nscd/socket`, or disabling nscd altogether.
 { lib, ... }:
 {
-  # 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 servo's 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?)
-  # TODO: rework servo's netns to use `firejail`, which is capable of spoofing /etc/resolv.conf.
-  services.resolved.enable = true;  #< to disable, set ` = lib.mkForce false`, as other systemd features default to enabling `resolved`.
-  # without DNSSEC:
-  # - dig matrix.org => works
-  # - curl https://matrix.org => works
-  # with default DNSSEC:
-  # - dig matrix.org => works
-  # - curl https://matrix.org => fails
-  # i don't know why. this might somehow be interfering with the DNS run on this device (trust-dns)
-  services.resolved.dnssec = "false";
+  # # 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 servo's 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?)
+  # # TODO: rework servo's netns to use `firejail`, which is capable of spoofing /etc/resolv.conf.
+  # services.resolved.enable = true;  #< to disable, set ` = lib.mkForce false`, as other systemd features default to enabling `resolved`.
+  # # without DNSSEC:
+  # # - dig matrix.org => works
+  # # - curl https://matrix.org => works
+  # # with default DNSSEC:
+  # # - dig matrix.org => works
+  # # - curl https://matrix.org => fails
+  # # i don't know why. this might somehow be interfering with the DNS run on this device (trust-dns)
+  # services.resolved.dnssec = "false";
+  # 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"
+  # ];
+
+  services.resolved.enable = lib.mkForce false;
+  sane.services.trust-dns.enable = true;
+  sane.services.trust-dns.instances.localhost = {
+    listenAddrs = [ "127.0.0.1" ];
+    enableRecursiveResolver = 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"
+    "127.0.0.1"
   ];
 
   # nscd -- the Name Service Caching Daemon -- caches DNS query responses

hosts/common/nix/default.nix

@@ -53,7 +53,7 @@
 
   # allow `nix-shell` (and probably nix-index?) to locate our patched and custom packages.
   # this is actually a no-op, and the real action happens in assigning `nix.settings.nix-path`.
-  nix.nixPath = (lib.optionals config.sane.enableSlowPrograms [
+  nix.nixPath = (lib.optionals (config.sane.maxBuildCost >= 2) [
     "nixpkgs=${pkgs.path}"
   ]) ++ [
     # note the import starts at repo root: this allows `./overlay/default.nix` to access the stuff at the root
@@ -65,10 +65,10 @@
 
   # ensure new deployments have a source of this repo with which they can bootstrap.
   # this however changes on every commit and can be slow to copy for e.g. `moby`.
-  environment.etc."nixos" = lib.mkIf config.sane.enableSlowPrograms {
+  environment.etc."nixos" = lib.mkIf (config.sane.maxBuildCost >= 2) {
     source = ../../..;
   };
-  environment.etc."nix/registry.json" = lib.mkIf (!config.sane.enableSlowPrograms) {
+  environment.etc."nix/registry.json" = lib.mkIf (config.sane.maxBuildCost < 2) {
     enable = false;
   };
 

hosts/common/polyunfill.nix

@@ -64,4 +64,9 @@
     # pkgs.udisks
     # pkgs.wpa_supplicant
   ];
+
+  # systemd by default forces shitty defaults for e.g. /tmp/.X11-unix.
+  # nixos propagates those in: <nixos/modules/system/boot/systemd/tmpfiles.nix>
+  # by overwriting this with an empty file, we can effectively remove it.
+  environment.etc."tmpfiles.d/x11.conf".text = "# (removed by Colin)";
 }

hosts/common/programs/abaddon.nix

@@ -87,13 +87,8 @@ in
 
     services.abaddon = {
       description = "unofficial Discord chat client";
-      wantedBy = lib.mkIf cfg.config.autostart [ "graphical-session.target" ];
-      serviceConfig = {
-        ExecStart = "${cfg.package}/bin/abaddon";
-        Type = "simple";
-        Restart = "always";
-        RestartSec = "20s";
-      };
+      partOf = lib.mkIf cfg.config.autostart [ "graphical-session" ];
+      command = "abaddon";
     };
   };
 }

hosts/common/programs/alsa-ucm-conf/default.nix

@@ -35,15 +35,15 @@ in
 
         # fix the self-contained ucm files i source from to have correct path within the alsa-ucm-conf source tree
         substituteInPlace ucm2/Allwinner/A64/PinePhone/PinePhone.conf \
-          --replace 'HiFi.conf' '/Allwinner/A64/PinePhone/HiFi.conf'
+          --replace-fail 'HiFi.conf' '/Allwinner/A64/PinePhone/HiFi.conf'
         substituteInPlace ucm2/Allwinner/A64/PinePhone/PinePhone.conf \
-        --replace 'VoiceCall.conf' '/Allwinner/A64/PinePhone/VoiceCall.conf'
+          --replace-fail 'VoiceCall.conf' '/Allwinner/A64/PinePhone/VoiceCall.conf'
       '' + lib.optionalString cfg.config.preferEarpiece ''
         # decrease the priority of the internal speaker so that sounds are routed
         # to the earpiece by default.
         # this is just personal preference.
-        substituteInPlace ucm2/Allwinner/A64/PinePhone/* \
-          --replace 'PlaybackPriority 300' 'PlaybackPriority 100'
+        substituteInPlace ucm2/Allwinner/A64/PinePhone/{HiFi.conf,VoiceCall.conf} \
+          --replace-fail 'PlaybackPriority 300' 'PlaybackPriority 100'
       '';
     });
 

hosts/common/programs/animatch.nix

@@ -30,6 +30,8 @@
       });
     };
 
+    buildCost = 1;
+
     sandbox.method = "bwrap";
     sandbox.whitelistWayland = true;
 

hosts/common/programs/assorted.nix

@@ -63,6 +63,7 @@ in
       "jq"
       "killall"
       "less"
+      "lftp"
       # "libcap_ng"  # for `netcap`
       "lsof"
       # "miniupnpc"
@@ -79,6 +80,7 @@ in
       "powertop"
       "pstree"
       "ripgrep"
+      "s6-rc"  # service manager
       "screen"
       "smartmontools"  # smartctl
       # "socat"
@@ -88,6 +90,7 @@ in
       "tree"
       "usbutils"  # lsusb
       "util-linux"  # lsblk, lscpu, etc
+      "valgrind"
       "wget"
       "wirelesstools"  # iwlist
       # "xq"  # jq for XML
@@ -107,7 +110,6 @@ in
     #   - debugging?
     consoleUtils = declPackageSet [
       "alsaUtils"  # for aplay, speaker-test
-      "strings"
       # "cdrtools"
       # "clinfo"
       # "dmidecode"
@@ -122,6 +124,7 @@ in
       # "gopass"
       # "gopass-jsonapi"
       # "helix"  # text editor
+      "htop"  # needed as a user package, for ~/.config/htop
       # "libsecret"  # for managing user keyrings (secret-tool)
       # "lm_sensors"  # for sensors-detect
       # "lshw"
@@ -135,6 +138,7 @@ in
       "nmon"
       # "node2nix"
       # "oathToolkit"  # for oathtool
+      "objdump"
       # "ponymix"
       "pulsemixer"
       "python3-repl"
@@ -147,6 +151,7 @@ in
       "sops"  # for manually viewing secrets; outside `sane-secrets` (TODO: improve sane-secrets!)
       "speedtest-cli"
       # "ssh-to-age"
+      "strings"
       "sudo"
       # "tageditor"  # music tagging
       # "unar"
@@ -171,6 +176,7 @@ in
       "ffmpeg"
       "go2tv"  # cast videos to UPNP/DLNA device (i.e. tv).
       "imagemagick"
+      "sane-cast"  # cast videos to UPNP/DLNA, with compatibility
       "sox"
       "yt-dlp"
     ];
@@ -209,6 +215,7 @@ in
 
     backblaze-b2 = {};
 
+    blanket.buildCost = 1;
     blanket.sandbox.method = "bwrap";
     blanket.sandbox.whitelistAudio = true;
     # blanket.sandbox.whitelistDbus = [ "user" ];  # TODO: untested
@@ -261,34 +268,42 @@ in
     ddrescue.sandbox.method = "landlock";  # TODO:sandbox: untested
     ddrescue.sandbox.autodetectCliPaths = "existingOrParent";
 
-    # auth token, preferences
+    delfin.buildCost = 1;
     delfin.sandbox.method = "bwrap";
     delfin.sandbox.whitelistAudio = true;
     delfin.sandbox.whitelistDbus = [ "user" ];  # else `mpris` plugin crashes the player
     delfin.sandbox.whitelistDri = true;
     delfin.sandbox.whitelistWayland = true;
     delfin.sandbox.net = "clearnet";
+    # auth token, preferences
     delfin.persist.byStore.private = [ ".config/delfin" ];
 
     dig.sandbox.method = "bwrap";
     dig.sandbox.net = "all";
 
     # creds, but also 200 MB of node modules, etc
+    discord.persist.byStore.private = [ ".config/discord" ];
+    discord.suggestedPrograms = [ "xwayland" ];
     discord.sandbox.method = "bwrap";
     discord.sandbox.wrapperType = "inplace";  #< /opt-style packaging
     discord.sandbox.whitelistAudio = true;
     discord.sandbox.whitelistDbus = [ "user" ];  # needed for xdg-open
     discord.sandbox.whitelistWayland = true;
+    discord.sandbox.whitelistX = true;
     discord.sandbox.net = "clearnet";
-    discord.persist.byStore.private = [ ".config/discord" ];
+    discord.sandbox.extraHomePaths = [
+      # still needs these paths despite it using the portal's file-chooser :?
+      "Pictures/cat"
+      "Pictures/Screenshots"
+      "Pictures/servo-macros"
+      "Videos/local"
+      "Videos/servo"
+      "tmp"
+    ];
 
     dtc.sandbox.method = "bwrap";
     dtc.sandbox.autodetectCliPaths = true;  # TODO:sandbox: untested
 
-    dtrx.sandbox.method = "bwrap";
-    dtrx.sandbox.whitelistPwd = true;
-    dtrx.sandbox.autodetectCliPaths = "existing";  #< for the archive
-
     duplicity = {};
 
     e2fsprogs.sandbox.method = "landlock";
@@ -301,11 +316,13 @@ in
 
     eg25-control = {};
 
+    electrum.buildCost = 1;
     electrum.sandbox.method = "bwrap";  # TODO:sandbox: untested
     electrum.sandbox.net = "all";  # TODO: probably want to make this run behind a VPN, always
     electrum.sandbox.whitelistWayland = true;
     electrum.persist.byStore.cryptClearOnBoot = [ ".electrum" ];  #< TODO: use XDG dirs!
 
+    endless-sky.buildCost = 1;
     endless-sky.persist.byStore.plaintext = [ ".local/share/endless-sky" ];
     endless-sky.sandbox.method = "bwrap";
     endless-sky.sandbox.whitelistAudio = true;
@@ -344,6 +361,7 @@ in
       ".persist/plaintext"
     ];
 
+    ffmpeg.buildCost = 1;
     ffmpeg.sandbox.method = "bwrap";
     ffmpeg.sandbox.autodetectCliPaths = "existingFileOrParent";  # it outputs uncreated files -> parent dir needs mounting
 
@@ -361,7 +379,9 @@ in
 
     fluffychat-moby.persist.byStore.plaintext = [ ".local/share/chat.fluffy.fluffychat" ];
 
+    font-manager.buildCost = 1;
     font-manager.sandbox.method = "bwrap";
+    font-manager.sandbox.whitelistWayland = true;
     font-manager.packageUnwrapped = pkgs.rmDbusServicesInPlace (pkgs.font-manager.override {
       # build without the "Google Fonts" integration feature, to save closure / avoid webkitgtk_4_0
       withWebkit = false;
@@ -396,8 +416,9 @@ in
     # TODO: we can populate gh's stuff statically; it even lets us use the same oauth across machines
     gh.persist.byStore.private = [ ".config/gh" ];
 
+    gimp.buildCost = 1;
     gimp.sandbox.method = "bwrap";
-    gimp.sandbox.net = "clearnet";  #< for Xwayland
+    gimp.sandbox.whitelistX = true;
     gimp.sandbox.whitelistWayland = true;
     gimp.sandbox.extraHomePaths = [
       "Pictures/albums"
@@ -415,32 +436,44 @@ in
       "/tmp"  # "Cannot open display:" if it can't mount /tmp 👀
     ];
 
+    "gnome.gnome-calculator".buildCost = 1;
     "gnome.gnome-calculator".sandbox.method = "bwrap";
     "gnome.gnome-calculator".sandbox.whitelistWayland = true;
 
+    "gnome.gnome-calendar".buildCost = 1;
     # gnome-calendar surely has data to persist, but i use it strictly to do date math, not track events.
     "gnome.gnome-calendar".sandbox.method = "bwrap";
     "gnome.gnome-calendar".sandbox.whitelistWayland = true;
 
+    "gnome.gnome-clocks".buildCost = 1;
     "gnome.gnome-clocks".sandbox.method = "bwrap";
     "gnome.gnome-clocks".sandbox.whitelistWayland = true;
     "gnome.gnome-clocks".suggestedPrograms = [ "dconf" ];
 
     # gnome-disks
+    "gnome.gnome-disk-utility".buildCost = 1;
     "gnome.gnome-disk-utility".sandbox.method = "bwrap";
     "gnome.gnome-disk-utility".sandbox.whitelistDbus = [ "system" ];
     "gnome.gnome-disk-utility".sandbox.whitelistWayland = true;
+    "gnome.gnome-disk-utility".sandbox.extraHomePaths = [
+      "tmp"
+      "use/iso"
+      # TODO: probably need /dev and such
+    ];
 
     # seahorse: dump gnome-keyring secrets.
+    "gnome.seahorse".buildCost = 1;
     # N.B.: it can also manage ~/.ssh keys, but i explicitly don't add those to the sandbox for now.
     "gnome.seahorse".sandbox.method = "bwrap";
     "gnome.seahorse".sandbox.whitelistDbus = [ "user" ];
     "gnome.seahorse".sandbox.whitelistWayland = true;
 
+    gnome-2048.buildCost = 1;
     gnome-2048.sandbox.method = "bwrap";
     gnome-2048.sandbox.whitelistWayland = true;
     gnome-2048.persist.byStore.plaintext = [ ".local/share/gnome-2048/scores" ];
 
+    gnome-frog.buildCost = 1;
     gnome-frog.sandbox.method = "bwrap";
     gnome-frog.sandbox.whitelistWayland = true;
     gnome-frog.sandbox.whitelistDbus = [ "user" ];
@@ -467,6 +500,7 @@ in
     # 1. no number may appear unshaded more than once in the same row/column
     # 2. no two shaded tiles can be direct N/S/E/W neighbors
     # - win once (1) and (2) are satisfied
+    "gnome.hitori".buildCost = 1;
     "gnome.hitori".sandbox.method = "bwrap";
     "gnome.hitori".sandbox.whitelistWayland = true;
 
@@ -496,6 +530,7 @@ in
     grim.sandbox.autodetectCliPaths = "existingOrParent";
     grim.sandbox.whitelistWayland = true;
 
+    hase.buildCost = 1;
     hase.sandbox.method = "bwrap";
     hase.sandbox.net = "clearnet";
     hase.sandbox.whitelistAudio = true;
@@ -509,16 +544,6 @@ in
     host.sandbox.method = "landlock";
     host.sandbox.net = "all";  #< technically, only needs to contact localhost's DNS server
 
-    htop.sandbox.method = "landlock";
-    htop.sandbox.extraPaths = [
-      "/proc"
-      "/sys/devices"
-    ];
-    htop.persist.byStore.plaintext = [
-      # consider setting `show_program_path=0` and either `hide_userland_threads=1` or `show_thread_names=1`
-      ".config/htop"
-    ];
-
     iftop.sandbox.method = "landlock";
     iftop.sandbox.capabilities = [ "net_raw" ];
 
@@ -526,6 +551,7 @@ in
     # N.B.: inetutils' `ping` is shadowed by iputils' ping (by nixos, intentionally).
     inetutils.sandbox.method = "landlock";  # want to keep the same netns, at least.
 
+    inkscape.buildCost = 1;
     inkscape.sandbox.method = "bwrap";
     inkscape.sandbox.whitelistWayland = true;
     inkscape.sandbox.extraHomePaths = [
@@ -551,6 +577,10 @@ in
     iproute2.sandbox.method = "landlock";
     iproute2.sandbox.net = "all";
     iproute2.sandbox.capabilities = [ "net_admin" ];
+    iproute2.sandbox.extraPaths = [
+      "/run/netns"  # for `ip netns ...` to work
+      "/var/run/netns"
+    ];
 
     iptables.sandbox.method = "landlock";
     iptables.sandbox.net = "all";
@@ -573,6 +603,7 @@ in
       "/proc"
     ];
 
+    krita.buildCost = 1;
     krita.sandbox.method = "bwrap";
     krita.sandbox.whitelistWayland = true;
     krita.sandbox.autodetectCliPaths = "existing";
@@ -593,6 +624,7 @@ in
     libnotify.sandbox.method = "bwrap";
     libnotify.sandbox.whitelistDbus = [ "user" ];  # notify-send
 
+    losslesscut-bin.buildCost = 1;
     losslesscut-bin.sandbox.method = "bwrap";
     losslesscut-bin.sandbox.extraHomePaths = [
       "Music"
@@ -608,27 +640,16 @@ in
     losslesscut-bin.sandbox.whitelistX = true;
 
     lsof.sandbox.method = "capshonly";  # lsof doesn't sandbox under bwrap or even landlock w/ full access to /
+    lsof.sandbox.capabilities = [ "dac_override" "sys_ptrace" ];
 
     lua = {};
 
-    "mate.engrampa".packageUnwrapped = pkgs.rmDbusServices pkgs.mate.engrampa;
-    "mate.engrampa".sandbox.method = "bwrap";  # TODO:sandbox: untested
-    "mate.engrampa".sandbox.whitelistWayland = true;
-    "mate.engrampa".sandbox.autodetectCliPaths = "existingOrParent";
-    "mate.engrampa".sandbox.extraHomePaths = [
-      "archive"
-      "Books/local"
-      "Books/servo"
-      "records"
-      "ref"
-      "tmp"
-    ];
-
     mercurial.sandbox.method = "bwrap";  # TODO:sandbox: untested
     mercurial.sandbox.net = "clearnet";
     mercurial.sandbox.whitelistPwd = true;
 
     # actual monero blockchain (not wallet/etc; safe to delete, just slow to regenerate)
+    monero-gui.buildCost = 1;
     # XXX: is it really safe to persist this? it doesn't have info that could de-anonymize if captured?
     monero-gui.persist.byStore.plaintext = [ ".bitmonero" ];
     monero-gui.sandbox.method = "bwrap";
@@ -637,6 +658,7 @@ in
       "records/finance/cryptocurrencies/monero"
     ];
 
+    mumble.buildCost = 1;
     mumble.persist.byStore.private = [ ".local/share/Mumble" ];
 
     nano.sandbox.method = "bwrap";
@@ -740,11 +762,14 @@ in
     pulsemixer.sandbox.method = "landlock";
     pulsemixer.sandbox.whitelistAudio = true;
 
+    pwvucontrol.buildCost = 1;
     pwvucontrol.sandbox.method = "bwrap";
     pwvucontrol.sandbox.whitelistAudio = true;
+    pwvucontrol.sandbox.whitelistDri = true;  # else perf on moby is unusable
     pwvucontrol.sandbox.whitelistWayland = true;
 
     python3-repl.packageUnwrapped = pkgs.python3.withPackages (ps: with ps; [
+      psutil
       requests
     ]);
     python3-repl.sandbox.method = "bwrap";
@@ -755,7 +780,7 @@ in
     ];
 
     qemu.sandbox.enable = false;  #< it's a launcher
-    qemu.slowToBuild = true;
+    qemu.buildCost = 2;
 
     rsync.sandbox.method = "bwrap";
     rsync.sandbox.net = "clearnet";
@@ -763,10 +788,9 @@ in
 
     rustc = {};
 
-    sane-open-desktop.sandbox.enable = false;  #< trivial script, and all our deps are sandboxed
-    sane-open-desktop.suggestedPrograms = [
-      "gdbus"
-    ];
+    sane-cast = {};  #< TODO: sandbox this the same way i sandbox go2tv
+
+    sane-die-with-parent.sandbox.enable = false;  #< it's a launcher; can't sandbox
 
     screen.sandbox.enable = false;  #< tty; needs to run anything
 
@@ -774,6 +798,7 @@ in
     sequoia.sandbox.whitelistPwd = true;
     sequoia.sandbox.autodetectCliPaths = true;
 
+    shattered-pixel-dungeon.buildCost = 1;
     shattered-pixel-dungeon.persist.byStore.plaintext = [ ".local/share/.shatteredpixel/shattered-pixel-dungeon" ];
     shattered-pixel-dungeon.sandbox.method = "bwrap";
     shattered-pixel-dungeon.sandbox.whitelistAudio = true;
@@ -781,6 +806,7 @@ in
     shattered-pixel-dungeon.sandbox.whitelistWayland = true;
 
     # printer/filament settings
+    slic3r.buildCost = 1;
     slic3r.persist.byStore.plaintext = [ ".Slic3r" ];
 
     slurp.sandbox.method = "bwrap";
@@ -795,12 +821,13 @@ in
     sops.sandbox.method = "bwrap";  # TODO:sandbox: untested
     sops.sandbox.extraHomePaths = [
       ".config/sops"
-      "dev/nixos"
+      "nixos"
       # TODO: sops should only need access to knowledge/secrets,
       # except that i currently put its .sops.yaml config in the root of ~/knowledge
       "knowledge"
     ];
 
+    soundconverter.buildCost = 1;
     soundconverter.sandbox.method = "bwrap";
     soundconverter.sandbox.whitelistWayland = true;
     soundconverter.sandbox.extraHomePaths = [
@@ -818,6 +845,7 @@ in
     sox.sandbox.autodetectCliPaths = "existingFileOrParent";
     sox.sandbox.whitelistAudio = true;
 
+    space-cadet-pinball.buildCost = 1;
     space-cadet-pinball.persist.byStore.plaintext = [ ".local/share/SpaceCadetPinball" ];
     space-cadet-pinball.sandbox.method = "bwrap";
     space-cadet-pinball.sandbox.whitelistAudio = true;
@@ -829,6 +857,8 @@ in
 
     sqlite = {};
 
+    sshfs-fuse = {};  # used by fs.nix
+
     strace.sandbox.enable = false;  #< needs to `exec` its args, and therefore support *anything*
 
     subversion.sandbox.method = "bwrap";
@@ -836,6 +866,7 @@ in
     subversion.sandbox.whitelistPwd = true;
     sudo.sandbox.enable = false;
 
+    superTux.buildCost = 1;
     superTux.sandbox.method = "bwrap";
     superTux.sandbox.wrapperType = "inplace";  # package Makefile incorrectly installs to $out/games/superTux instead of $out/share/games
     superTux.sandbox.whitelistAudio = true;
@@ -854,12 +885,14 @@ in
 
     tdesktop.persist.byStore.private = [ ".local/share/TelegramDesktop" ];
 
+    tokodon.buildCost = 1;
     tokodon.persist.byStore.private = [ ".cache/KDE/tokodon" ];
 
     tree.sandbox.method = "landlock";
     tree.sandbox.autodetectCliPaths = true;
     tree.sandbox.whitelistPwd = true;
 
+    tumiki-fighters.buildCost = 1;
     tumiki-fighters.sandbox.method = "bwrap";
     tumiki-fighters.sandbox.whitelistAudio = true;
     tumiki-fighters.sandbox.whitelistDri = true;  #< not strictly necessary, but triples CPU perf
@@ -878,12 +911,16 @@ in
       "/sys/bus/usb"
     ];
 
+    valgrind.buildCost = 1;
+    valgrind.sandbox.enable = false;  #< it's a launcher: can't sandbox
+
     visidata.sandbox.method = "bwrap";  # TODO:sandbox: untested
     visidata.sandbox.autodetectCliPaths = true;
 
     # `vulkaninfo`, `vkcube`
     vulkan-tools.sandbox.method = "landlock";
 
+    vvvvvv.buildCost = 1;
     vvvvvv.sandbox.method = "bwrap";
     vvvvvv.sandbox.whitelistAudio = true;
     vvvvvv.sandbox.whitelistDri = true;  #< playable without, but burns noticably more CPU
@@ -904,6 +941,7 @@ in
     wget.sandbox.net = "all";
     wget.sandbox.whitelistPwd = true;  # saves to pwd by default
 
+    whalebird.buildCost = 1;
     whalebird.persist.byStore.private = [ ".config/Whalebird" ];
 
     # `wg`, `wg-quick`
@@ -922,7 +960,7 @@ in
     xwayland.sandbox.method = "bwrap";
     xwayland.sandbox.wrapperType = "inplace";  #< consumers use it as a library (e.g. wlroots)
     xwayland.sandbox.whitelistWayland = true;  #< just assuming this is needed
-    xwayland.sandbox.net = "clearnet";  #< just assuming this is needed (X11 traffic)
+    xwayland.sandbox.whitelistX = true;
     xwayland.sandbox.whitelistDri = true;  #< would assume this gives better gfx perf
 
     xterm.sandbox.enable = false;  # need to be able to do everything

hosts/common/programs/audacity.nix

@@ -1,3 +1,8 @@
+# tips/tricks
+# - audio recording
+#   - default recording input will be silent, on lappy.
+#   - Audio Setup -> Rescan Audio Devices ...
+#   - Audio Setup -> Recording device -> sysdefault
 { pkgs, ... }:
 {
   sane.programs.audacity = {
@@ -9,6 +14,8 @@
       };
     };
 
+    buildCost = 1;
+
     sandbox.method = "bwrap";
     sandbox.whitelistAudio = true;
     sandbox.whitelistWayland = true;
@@ -20,6 +27,9 @@
       # audacity needs the entire config dir mounted if running in a sandbox
       ".config/audacity"
     ];
+    sandbox.extraPaths = [
+      "/dev/snd"  # for recording audio inputs to work
+    ];
 
     # disable first-run splash screen
     fs.".config/audacity/audacity.cfg".file.text = ''

hosts/common/programs/blast-ugjka/blast-to-default

@@ -2,10 +2,7 @@
 #!nix-shell -i python3 -p "python3.withPackages (ps: [  ])" -p blast-ugjka
 # vim: set filetype=python :
 
-import ctypes
 import logging
-import os
-import signal
 import socket
 import subprocess
 
@@ -19,50 +16,6 @@ DEVICE_MAP = {
   "[LG] webOS TV OLED55C9PUA": [ "-usewav" ],
 }
 
-def set_pdeathsig(sig=signal.SIGTERM):
-    """
-    helper function to ensure once parent process exits, its children processes will automatically die.
-    see: <https://stackoverflow.com/a/43152455>
-    see: <https://www.man7.org/linux/man-pages/man2/prctl.2.html>
-    """
-    libc = ctypes.CDLL("libc.so.6")
-    return libc.prctl(1, sig)
-
-MY_PID = None
-
-def reap_children(sig=None, frame=None):
-    global MY_PID
-    # reset SIGTERM handler to avoid recursing
-    signal.signal(signal.SIGTERM, signal.Handlers.SIG_DFL)
-    logger.info("killing all children (of pid %d)", MY_PID)
-    os.killpg(MY_PID, signal.SIGTERM)
-
-def reap_on_exit():
-    """
-    catch when the parent exits, and map that to SIGTERM for this process.
-    when this process receives SIGTERM, also terminate all descendent processes.
-
-    this is done because:
-    1. mpv invokes this, but (potentially) via the sandbox wrapper.
-    2. when mpv exits, it `SIGKILL`s that sandbox wrapper.
-    3. bwrap does not pass SIGKILL or SIGTERM to its child.
-    4. hence, we neither receive that signal NOR can we pass it on simply by killing our immediate children
-       (since any bwrap'd children wouldn't pass that signal on...)
-    really, the proper fix would be on mpv's side:
-    - mpv should create a new process group when it launches a command, and kill that process group on exit.
-    or fix this in the sandbox wrapper:
-    - why *doesn't* bwrap forward the signals?
-    - there's --die-with-parent, but i can't apply that *system wide* and expect reasonably behavior
-      <https://github.com/containers/bubblewrap/issues/529>
-    """
-    global MY_PID
-    MY_PID = os.getpid()
-    # create a new process group, pgid = gid
-    os.setpgid(MY_PID, MY_PID)
-
-    set_pdeathsig(signal.SIGTERM)
-    signal.signal(signal.SIGTERM, reap_children)
-
 def get_ranked_ip_addrs():
     """
     return the IP addresses most likely to be LAN addresses
@@ -96,8 +49,6 @@ class BlastDriver:
             stdin=subprocess.PIPE,
             stdout=subprocess.PIPE,
             stderr=subprocess.PIPE,
-            # this pdeathsig isn't necessary; seems it might result in leaked pulse outputs
-            # preexec_fn=set_pdeathsig
         )
         self.blast_flags = list(blast_flags)
         self.receiver_names = []
@@ -202,15 +153,11 @@ def main():
     logging.basicConfig()
     logging.getLogger().setLevel(logging.DEBUG)
 
-    reap_on_exit()
-
     blast = try_blast()
 
     if blast is not None:
         logger.info("waiting until blast exits")
         blast.blast.wait()
 
-    reap_children()
-
 if __name__ == "__main__":
     main()

hosts/common/programs/blast-ugjka/default.nix

@@ -44,7 +44,7 @@ in
       # might be possible to remove this, but kinda hard to see a clean way.
       "--sane-sandbox-keep-namespace" "pid"
     ];
-    suggestedPrograms = [ "blast-ugjka" ];
+    suggestedPrograms = [ "blast-ugjka" "sane-die-with-parent" ];
   };
 
   networking.firewall.allowedTCPPorts = lib.mkIf cfg.enabled [ 9000 ];

hosts/common/programs/bonsai.nix

@@ -99,18 +99,12 @@ in
             type = types.listOf transitionType;
             default = [];
           };
-          configFile = mkOption {
-            type = types.path;
-            default = pkgs.writeText "bonsai_tree.json" (builtins.toJSON cfg.config.transitions);
-            description = ''
-              configuration file to pass to bonsai.
-              usually auto-generated from the sibling options; exposed mainly for debugging or convenience.
-            '';
-          };
         };
       };
     };
 
+    fs.".config/bonsai/bonsai_tree.json".symlink.text = builtins.toJSON cfg.config.transitions;
+
     sandbox.method = "bwrap";
     sandbox.extraRuntimePaths = [
       "/"  #< just needs "bonsai", but needs to create it first...
@@ -118,18 +112,10 @@ in
 
     services.bonsaid = {
       description = "bonsai: programmable input dispatcher";
-      after = [ "graphical-session.target" ];
-      wantedBy = [ "graphical-session.target" ];
-
-      script = ''
-        ${pkgs.coreutils}/bin/rm -f $XDG_RUNTIME_DIR/bonsai
-        exec ${cfg.package}/bin/bonsaid -t ${cfg.config.configFile}
-      '';
-      serviceConfig = {
-        Type = "simple";
-        Restart = "always";
-        RestartSec = "5s";
-      };
+      partOf = [ "graphical-session" ];
+      # nice -n -11 chosen arbitrarily. i hope this will allow for faster response to inputs, but without audio underruns (pipewire is -21, dino -15-ish)
+      command = "nice -n -11 bonsaid -t $HOME/.config/bonsai/bonsai_tree.json";
+      cleanupCommand = "rm -f $XDG_RUNTIME_DIR/bonsai";
     };
   };
 }

hosts/common/programs/bubblewrap.nix

@@ -21,12 +21,12 @@
         # note that invoking bwrap with capabilities in the 'init' namespace does NOT grant the sandboxed process
         # capabilities in the 'init' namespace. it's a limitation of namespaces that namespaced processes can
         # never receive capabilities in their parent namespace.
-        substituteInPlace bubblewrap.c --replace \
+        substituteInPlace bubblewrap.c --replace-fail \
           'die ("Unexpected capabilities but not setuid, old file caps config?");' \
           '// die ("Unexpected capabilities but not setuid, old file caps config?");'
 
         # enable debug printing
-        # substituteInPlace utils.h --replace \
+        # substituteInPlace utils.h --replace-fail \
         #   '#define __debug__(x)' \
         #   '#define __debug__(x) printf x'
       '';

hosts/common/programs/calls.nix

@@ -44,15 +44,9 @@ in
     services.gnome-calls = {
       # TODO: prevent gnome-calls from daemonizing when started manually
       description = "gnome-calls daemon to monitor incoming SIP calls";
-      wantedBy = lib.mkIf cfg.config.autostart [ "graphical-session.target" ];
-      serviceConfig = {
-        # add --verbose for more debugging
-        ExecStart = "${cfg.package}/bin/gnome-calls --daemon";
-        Type = "simple";
-        Restart = "always";
-        RestartSec = "10s";
-      };
-      environment.G_MESSAGES_DEBUG = "all";
+      partOf = lib.mkIf cfg.config.autostart [ "graphical-session" ];
+      # add --verbose for more debugging
+      command = "env G_MESSAGES_DEBUG=all gnome-calls --daemon";
     };
   };
   programs.calls = lib.mkIf cfg.enabled {

hosts/common/programs/celeste64.nix

@@ -1,6 +1,8 @@
 { ... }:
 {
   sane.programs.celeste64 = {
+    buildCost = 1;
+
     sandbox.method = "bwrap";
     sandbox.whitelistAudio = true;
     sandbox.whitelistDri = true;

hosts/common/programs/conky/default.nix

@@ -1,4 +1,4 @@
-{ config, pkgs, ... }:
+{ pkgs, ... }:
 {
   sane.programs.conky = {
     # TODO: non-sandboxed `conky` still ships via `sxmo-utils`, but unused
@@ -14,6 +14,7 @@
 
     fs.".config/conky/conky.conf".symlink.target =
       let
+        # TODO: make this just another `suggestedPrograms`!
         battery_estimate = pkgs.static-nix-shell.mkBash {
           pname = "battery_estimate";
           srcRoot = ./.;
@@ -26,14 +27,8 @@
 
     services.conky = {
       description = "conky dynamic desktop background";
-      after = [ "graphical-session.target" ];
-      # partOf = [ "graphical-session.target" ];  # propagate stop/restart signal from graphical-session to this unit
-      wantedBy = [ "graphical-session.target" ];
-
-      serviceConfig.ExecStart = "${config.sane.programs.conky.package}/bin/conky";
-      serviceConfig.Type = "simple";
-      serviceConfig.Restart = "on-failure";
-      serviceConfig.RestartSec = "10s";
+      partOf = [ "graphical-session" ];
+      command = "conky";
     };
   };
 }

hosts/common/programs/cozy.nix

@@ -13,6 +13,8 @@
       '';
     });
 
+    buildCost = 1;
+
     sandbox.method = "bwrap";  # landlock gives: _multiprocessing.SemLock: Permission Denied
     sandbox.whitelistAudio = true;
     sandbox.whitelistDbus = [ "user" ];  # mpris

hosts/common/programs/cups.nix

@@ -0,0 +1,34 @@
+# docs: <https://wiki.nixos.org/wiki/Printing>
+# to add a printer:
+# 1. <http://localhost:631/admin/>
+# 2. click "find new printers" and follow prompts
+#   - prefer to use the "Generic IPP Everywhere Printer" driver
+# alternatively, add/modify printers by running
+# - `system-config-printer`
+{ config, lib, ... }:
+let
+  cfg = config.sane.programs.cups;
+in
+{
+  sane.programs.cups = {
+    suggestedPrograms = [
+      "system-config-printer"
+    ];
+  };
+  sane.programs.system-config-printer = {};
+
+  services.printing = lib.mkIf cfg.enabled {
+    enable = true;
+    startWhenNeeded = false;  #< a.k.a. socket activated?
+    # webInterface = false;
+    # logLevel = "debug";  # default: "info"
+    # extraConfig = "<lines ... >";
+    # drivers = [ <cups driver packages...> ]
+  };
+  # services.avahi = lib.mkIf cfg.enabled {
+  #   # only needed for wireless printing
+  #   enable = true;
+  #   nssmdns4 = true;
+  #   openFirewall = true;
+  # };
+}

hosts/common/programs/curlftpfs.nix

@@ -0,0 +1,35 @@
+{ pkgs, ... }:
+{
+  sane.programs.curlftpfs = {
+    packageUnwrapped = pkgs.curlftpfs.overrideAttrs (upstream: {
+      # my fork includes:
+      # - per-operation timeouts (CURLOPT_TIMEOUT; would use CURLOPT_LOW_SPEED_TIME/CURLOPT_LOW_SPEED_LIMIT but they don't apply)
+      #   - exit on timeout (so that one knows to abort the mount, instead of waiting indefinitely)
+      # - support for "meta" keys found in /etc/fstab
+      src = pkgs.fetchFromGitea {
+        domain = "git.uninsane.org";
+        owner = "colin";
+        repo = "curlftpfs";
+        rev = "0890d32e709b5a01153f00d29ed4c00299744f5d";
+        hash = "sha256-M28PzHqEAkezQdtPeL16z56prwl3BfMZqry0dlpXJls=";
+      };
+      # `mount` clears PATH before calling the mount helper (see util-linux/lib/env.c),
+      # so the traditional /etc/fstab approach of fstype=fuse and device = curlftpfs#URI doesn't work.
+      # instead, install a `mount.curlftpfs` mount helper. this is what programs like `gocryptfs` do.
+      postInstall = (upstream.postInstall or "") + ''
+        ln -s curlftpfs $out/bin/mount.fuse.curlftpfs
+        ln -s curlftpfs $out/bin/mount.curlftpfs
+      '';
+    });
+
+    # TODO: try to sandbox this better? maybe i can have fuse (unsandboxed) invoke curlftpfs (sandboxed)?
+    # - landlock gives EPERM
+    # - bwrap just silently doesn't mount it, maybe because of setuid stuff around fuse?
+    # sandbox.method = "capshonly";
+    # sandbox.net = "all";
+    # sandbox.capabilities = [
+    #   "sys_admin"
+    #   "sys_module"
+    # ];
+  };
+}

hosts/common/programs/dconf.nix

@@ -34,15 +34,8 @@ in
 
     services.dconf = {
       description = "dconf configuration database/server";
-      after = [ "graphical-session.target" ];
-      wantedBy = [ "graphical-session.target" ];
-
-      serviceConfig = {
-        ExecStart = "${lib.getLib cfg.package}/libexec/dconf-service";
-        Type = "simple";
-        Restart = "always";
-        RestartSec = "5s";
-      };
+      partOf = [ "graphical-session" ];
+      command = "${lib.getLib cfg.package}/libexec/dconf-service";
     };
 
     # supposedly necessary for packages which haven't been wrapped (i.e. wrapGtkApp?),

hosts/common/programs/default.nix

@@ -21,11 +21,17 @@
     ./chatty.nix
     ./conky
     ./cozy.nix
+    ./cups.nix
+    ./curlftpfs.nix
     ./dconf.nix
     ./deadd-notification-center
     ./dialect.nix
     ./dino.nix
+    ./dissent.nix
+    ./dtrx.nix
+    ./eg25-control.nix
     ./element-desktop.nix
+    ./engrampa.nix
     ./epiphany.nix
     ./evince.nix
     ./fcitx5.nix
@@ -50,15 +56,17 @@
     ./gpodder.nix
     ./grimshot.nix
     ./gthumb.nix
-    ./gtkcord4.nix
+    ./gvfs.nix
     ./handbrake.nix
     ./helix.nix
+    ./htop
     ./imagemagick.nix
     ./jellyfin-media-player.nix
     ./kdenlive.nix
     ./komikku.nix
     ./koreader
     ./less.nix
+    ./lftp.nix
     ./libreoffice.nix
     ./lemoa.nix
     ./loupe.nix
@@ -66,17 +74,20 @@
     ./megapixels.nix
     ./mepo.nix
     ./mimeo
+    ./modemmanager.nix
     ./mopidy.nix
     ./mpv
     ./msmtp.nix
     ./nautilus.nix
     ./neovim.nix
+    ./networkmanager.nix
     ./newsflash.nix
     ./nheko.nix
     ./nicotine-plus.nix
     ./nix-index.nix
     ./notejot.nix
     ./ntfy-sh.nix
+    ./objdump.nix
     ./obsidian.nix
     ./offlineimap.nix
     ./open-in-mpv.nix
@@ -87,7 +98,11 @@
     ./rhythmbox.nix
     ./ripgrep.nix
     ./rofi
+    ./rtkit.nix
+    ./s6-rc.nix
     ./sane-input-handler
+    ./sane-open.nix
+    ./sane-sandboxed.nix
     ./sane-screenshot.nix
     ./sane-scripts.nix
     ./schlock.nix
@@ -118,7 +133,7 @@
     ./wine.nix
     ./wireplumber.nix
     ./wireshark.nix
-    ./wob
+    ./wpa_supplicant.nix
     ./wvkbd.nix
     ./xarchiver.nix
     ./xdg-desktop-portal.nix
@@ -129,6 +144,7 @@
     ./zathura.nix
     ./zeal.nix
     ./zecwallet-lite.nix
+    ./zulip.nix
     ./zsh
   ];
 

hosts/common/programs/dialect.nix

@@ -1,15 +1,6 @@
 { pkgs, ... }:
 {
   sane.programs.dialect = {
-    sandbox.method = "bwrap";
-    sandbox.wrapperType = "inplace";  # share/search_providers/ calls back into the binary, weird wrap semantics
-    sandbox.whitelistWayland = true;
-    sandbox.net = "clearnet";
-    sandbox.extraHomePaths = [
-      ".config/dconf"  # won't start without it
-    ];
-    suggestedPrograms = [ "dconf" ];  #< to persist settings
-
     packageUnwrapped = pkgs.dialect.overrideAttrs (upstream: {
       # TODO: send upstream
       # TODO: figure out how to get audio working
@@ -18,5 +9,17 @@
         pkgs.glib-networking  # for TLS
       ];
     });
+
+    suggestedPrograms = [ "dconf" ];  #< to persist settings
+
+    buildCost = 1;
+
+    sandbox.method = "bwrap";
+    sandbox.wrapperType = "inplace";  # share/search_providers/ calls back into the binary, weird wrap semantics
+    sandbox.whitelistWayland = true;
+    sandbox.net = "clearnet";
+    sandbox.extraHomePaths = [
+      ".config/dconf"  # won't start without it
+    ];
   };
 }

hosts/common/programs/dino.nix

@@ -14,22 +14,27 @@
 # but at present it has no "start in tray" type of option: it must render a window.
 #
 # outstanding bugs:
+# - NAT holepunching burns CPU/NET when multiple interfaces are up
+#   - fix by just `ip link set ovpnd-xyz down`
+#     - setting `wg-home` down *seems* to be not necessary
+#   - characterized by UPnP/SOAP error 500/718 in wireshark
+#   - seems it asks router A to open a port mapping for an IP address which belongs to a different subnet...
 # - mic is sometimes disabled at call start despite presenting as enabled
 #   - fix is to toggle it off -> on in the Dino UI
 # - default mic gain is WAY TOO MUCH (heavily distorted)
-# - TODO: dino should have more optimal niceness/priority to ensure it can process its buffers
-#   - possibly this is solved by enabling RealtimeKit (rtkit)
+# - on lappy/desktop, right-clicking the mic button allows to toggle audio devices, but impossible to trigger this on moby/touch screen!
 # - TODO: see if Dino calls work better with `echo full > /sys/kernel/debug/sched/preempt`
 #
 # probably fixed:
 # - once per 1-2 minutes dino will temporarily drop mic input:
-#   - `rtp-WRNING: plugin.vala:148: Warning in pipeline: Can't record audio fast enough
+#   - `rtp-WARNING: plugin.vala:148: Warning in pipeline: Can't record audio fast enough
 #   - this was *partially* fixed by bumping the pipewire mic buffer to 2048 samples (from ~512)
 #   - this was further fixed by setting PULSE_LATENCY_MSEC=20.
 #   - possibly Dino should be updated internally: `info.rate / 100` -> `info.rate / 50`.
 #     - i think that affects the batching for echo cancellation, adaptive gain control, etc.
+#   - dino *should* be able to use Pipewire directly for calls instead of going through pulse, but had trouble achieving that in actuality
 #
-{ config, lib, ... }:
+{ config, lib, pkgs, ... }:
 let
   cfg = config.sane.programs.dino;
 in
@@ -45,6 +50,33 @@ in
       };
     };
 
+    packageUnwrapped = (pkgs.dino.override {
+      # XXX(2024/04/24): build without echo cancelation (i.e. force WITH_VOICE_PROCESSOR to be undefined).
+      # this means that if the other end of the call is on speaker phone, i'm liable to hear my own voice
+      # leave their speaker, enter their mic, and then return to me.
+      # the benefit is a >50% reduction in CPU use. insignificant on any modern PC; make-or-break on a low-power Pinephone.
+      webrtc-audio-processing = null;
+    }).overrideAttrs (upstream: {
+      # i'm updating experimentally to see if it improves call performance.
+      # i don't *think* this is actually necessary; i don't notice any difference.
+      version = "0.4.3-unstable-2024-04-28";
+      src = lib.warnIf (lib.versionOlder "0.4.3" upstream.version) "dino update: safe to remove sane patches" pkgs.fetchFromGitHub {
+        owner = "dino";
+        repo = "dino";
+        rev = "657502955567dd538e56f300e075c7db52e25d74";
+        hash = "sha256-SApJy9FgxxLOB5A/zGtpdFZtSqSiS03vggRrCte1tFE=";
+      };
+      # avoid double-application of upstreamed patches
+      # https://github.com/NixOS/nixpkgs/pull/309265
+      patches = [];
+      checkPhase = ''
+        runHook preCheck
+        ./xmpp-vala-test
+        # ./signal-protocol-vala-test  # doesn't exist anymore
+        runHook postCheck
+      '';
+    });
+
     sandbox.method = "bwrap";
     sandbox.net = "clearnet";
     sandbox.whitelistAudio = true;
@@ -68,26 +100,34 @@ in
 
     services.dino = {
       description = "dino XMPP client";
-      after = [ "graphical-session.target" ];
-      # partOf = [ "graphical-session.target" ];
-      wantedBy = lib.mkIf cfg.config.autostart [ "graphical-session.target" ];
-
-      serviceConfig = {
-        ExecStart = "${cfg.package}/bin/dino";
-        Type = "simple";
-        Restart = "always";
-        RestartSec = "20s";
-      };
+      partOf = lib.mkIf cfg.config.autostart [ "graphical-session" ];
 
       # audio buffering; see: <https://gitlab.freedesktop.org/pipewire/pipewire/-/wikis/FAQ#pipewire-buffering-explained>
       # dino defaults to 10ms mic buffer, which causes underruns, which Dino handles *very* poorly
       # as in, the other end of the call will just not receive sound from us for a couple seconds.
-      # pipewire uses power-of-two buffering for the mic itself. that would put us at 21.33 ms, but this env var supports only whole numbers (21ms ends up not power-of-two).
-      # also, Dino's likely still doing things in 10ms batches internally anyway.
-      environment.PULSE_LATENCY_MSEC = "20";
-
+      # pipewire uses power-of-two buffering for the mic itself (by default), but this env var supports only whole numbers, which isn't quite reconcilable:
+      # - 1024/48000 = 21.33ms
+      # - 2048/48000 = 42.67ms
+      # - 4096/48000 = 85.33ms
+      # also, Dino's likely still doing things in 10ms batches internally.
+      #
+      # note that this number supposedly is just the buffer size which Dino asks Pulse (pipewire) to share with it.
+      # in theory, it's equivalent to adjusting pipewire's quanta setting, and so isn't additive to the existing pipewire buffers.
+      # (and would also be overriden by pipewire's quanta.min setting).
+      # but in practice, setting this seems to have some more effect beyond just the buffer sizes visible in `pw-top`.
+      #
+      # further: decrease the "niceness" of dino, so that it can take precedence over anything else.
+      # ideally this would target just the audio processing, rather than the whole program.
+      # pipewire is the equivalent of `nice -n -21`, so probably don't want to go any more extreme than that.
+      # nice -n -15 chosen arbitrarily; not optimized (and seems to have very little impact in practice anyway).
+      # buffer size:
+      # - 1024 (PULSE_LATENCY_MSEC=20): `pw-top` shows several underruns per second.
+      # - 2048 (PULSE_LATENCY_MSEC=50): `pw-top` shows very few underruns: maybe 1-5 per minute. with voice processor disabled, this works well. with it enabled, i still get gaps in which the mic "disappears".
+      # - 4096 (PULSE_LATENCY_MSEC=100): `pw-top` shows 0 underruns. with voice processor disabled, i seem to be permanently muted. with it enabled, this works well.
+      #
       # note that debug logging during calls produces so much journal spam that it pegs the CPU and causes dropped audio
-      # environment.G_MESSAGES_DEBUG = "all";
+      # env G_MESSAGES_DEBUG = "all";
+      command = "env PULSE_LATENCY_MSEC=50 nice -n -15 dino";
     };
   };
 }

hosts/common/programs/dissent.nix

@@ -3,10 +3,10 @@
 #   - notification sounds can be handled by swaync
 { config, lib, pkgs, ... }:
 let
-  cfg = config.sane.programs.gtkcord4;
+  cfg = config.sane.programs.dissent;
 in
 {
-  sane.programs.gtkcord4 = {
+  sane.programs.dissent = {
     configOption = with lib; mkOption {
       default = {};
       type = types.submodule {
@@ -17,18 +17,18 @@ in
       };
     };
 
-    packageUnwrapped = pkgs.gtkcord4.overrideAttrs (upstream: {
+    packageUnwrapped = pkgs.dissent.overrideAttrs (upstream: {
       postConfigure = (upstream.postConfigure or "") + ''
-        # gtkcord4 uses go-keyring to interface with the org.freedesktop.secrets provider (i.e. gnome-keyring).
+        # dissent uses go-keyring to interface with the org.freedesktop.secrets provider (i.e. gnome-keyring).
         # go-keyring hardcodes `login.keyring` as the keyring to store secrets in, instead of reading `~/.local/share/keyring/default`.
         # `login.keyring` seems to be a special keyring preconfigured (by gnome-keyring) to encrypt everything to the user's password.
         # that's redundant with my fs-level encryption and makes the keyring less inspectable,
-        # so patch gtkcord4 to use Default_keyring instead.
+        # so patch dissent to use Default_keyring instead.
         # see:
-        # - <https://github.com/diamondburned/gtkcord4/issues/139>
+        # - <https://github.com/diamondburned/dissent/issues/139>
         # - <https://github.com/zalando/go-keyring/issues/46>
         substituteInPlace vendor/github.com/zalando/go-keyring/secret_service/secret_service.go \
-          --replace '"login"' '"Default_keyring"'
+          --replace-fail '"login"' '"Default_keyring"'
       '';
     });
     sandbox.method = "bwrap";
@@ -51,22 +51,14 @@ in
     ];
 
     persist.byStore.private = [
-      ".cache/gtkcord4"
-      ".config/gtkcord4"  # empty?
+      ".cache/dissent"
+      ".config/dissent"  # empty?
     ];
 
-    services.gtkcord4 = {
-      description = "gtkcord4 Discord client";
-      after = [ "graphical-session.target" ];
-      # partOf = [ "graphical-session.target" ];
-      wantedBy = lib.mkIf cfg.config.autostart [ "graphical-session.target" ];
-
-      serviceConfig = {
-        ExecStart = "${cfg.package}/bin/gtkcord4";
-        Type = "simple";
-        Restart = "always";
-        RestartSec = "20s";
-      };
+    services.dissent = {
+      description = "dissent Discord client";
+      partOf = lib.mkIf cfg.config.autostart [ "graphical-session" ];
+      command = "dissent";
     };
   };
 }

hosts/common/programs/dtrx.nix

@@ -0,0 +1,16 @@
+{ pkgs, ... }:
+{
+  sane.programs.dtrx = {
+    packageUnwrapped = pkgs.dtrx.override {
+      # `binutils` is the nix wrapper, which reads nix-related env vars
+      # before passing on to e.g. `ld`.
+      # dtrx probably only needs `ar` at runtime, not even `ld`.
+      binutils = pkgs.binutils-unwrapped;
+      # build without rpm support, since `rpm` package doesn't cross-compile.
+      rpm = null;
+    };
+    sandbox.method = "bwrap";
+    sandbox.whitelistPwd = true;
+    sandbox.autodetectCliPaths = "existing";  #< for the archive
+  };
+}

hosts/common/programs/eg25-control.nix

@@ -0,0 +1,74 @@
+{ config, lib, pkgs, ... }:
+let
+  cfg = config.sane.programs.eg25-control;
+in
+{
+  sane.programs.eg25-control = {
+    suggestedPrograms = [ "modemmanager" ];
+
+    services.eg25-control-powered = {
+      description = "eg25-control-powered: power to the Qualcomm eg25 modem used by PinePhone";
+      startCommand = "eg25-control --power-on --verbose";
+      cleanupCommand = "eg25-control --power-off --verbose";
+      # depends = [ "ModemManager" ]
+    };
+
+    services.eg25-control-gps = {
+      # TODO: separate almanac upload from GPS enablement
+      # - don't want to re-upload the almanac everytime the GPS is toggled
+      # - want to upload almanac even when GPS *isn't* enabled, if we have internet connection.
+      description = "eg25-control-gps: background GPS tracking";
+      startCommand = "eg25-control --enable-gps --dump-debug-info --verbose";
+      cleanupCommand = "eg25-control --disable-gps --dump-debug-info --verbose";
+      depends = [ "eg25-control-powered" ];
+    };
+  };
+
+  # TODO: port to s6
+  systemd.services.eg25-control-freshen-agps = lib.mkIf cfg.enabled {
+    description = "keep assisted-GPS data fresh";
+    serviceConfig = {
+      # XXX: this can have a race condition with eg25-control-gps
+      # - eg25-control-gps initiates DL of new/<agps>
+      # - eg25-control-gps tests new/<agps>: it works
+      # - eg25-control-freshen-agps initiates DL of new/<agps>
+      # - eg25-control-gps: moves new/<agps> into cache/
+      #   - but it moved the result (possibly incomplete) of eg25-control-freshen-agps, incorrectly
+      # in practice, i don't expect much issue from this.
+      ExecStart = "${cfg.package}/bin/eg25-control --ensure-agps-cache --verbose";
+      Restart = "no";
+
+      User = "eg25-control";
+      WorkingDirectory = "/var/lib/eg25-control";
+      StateDirectory = "eg25-control";
+    };
+    startAt = "hourly";  # this is a bit more than necessary, but idk systemd calendar syntax
+    after = [ "network-online.target" "nss-lookup.target" ];
+    requires = [ "network-online.target" ];
+    # wantedBy = [ "network-online.target" ]; # auto-start immediately after boot
+  };
+
+  users = lib.mkIf cfg.enabled {
+    groups.eg25-control = {};
+    users.eg25-control = {
+      group = "eg25-control";
+      isSystemUser = true;
+      home = "/var/lib/eg25-control";
+      extraGroups = [
+        "dialout"  # required to read /dev/ttyUSB1
+        "networkmanager"  # required to authenticate with mmcli
+      ];
+    };
+  };
+  sane.persist.sys.byStore.plaintext = lib.mkIf cfg.enabled [
+    # to persist agps data, i think.
+    { user = "eg25-control"; group = "eg25-control"; path = "/var/lib/eg25-control"; }
+  ];
+  services.udev.extraRules = let
+    chmod = "${pkgs.coreutils}/bin/chmod";
+    chown = "${pkgs.coreutils}/bin/chown";
+  in ''
+    # make Modem controllable by user
+    DRIVER=="modem-power", RUN+="${chmod} g+w /sys%p/powered", RUN+="${chown} :networkmanager /sys%p/powered"
+  '';
+}

hosts/common/programs/element-desktop.nix

@@ -4,18 +4,29 @@
 #     - <https://github.com/vector-im/element-desktop/issues/1029#issuecomment-1632688224>
 #   - `rm -rf ~/.config/Element/GPUCache`
 #     - <https://github.com/NixOS/nixpkgs/issues/244486>
-{ pkgs, ... }:
+{ lib, pkgs, ... }:
 {
   sane.programs.element-desktop = {
-    packageUnwrapped = pkgs.element-desktop.override {
-      # use pre-build electron because otherwise it takes 4 hrs to build from source.
-      electron = pkgs.electron-bin;
-    };
+    packageUnwrapped = (pkgs.element-desktop.override {
+      # use pre-built electron because otherwise it takes 4 hrs to build from source.
+      electron = pkgs.electron_28-bin;
+    }).overrideAttrs (upstream: {
+      # fix to use wayland instead of Xwayland:
+      # - replace `NIXOS_OZONE_WL` non-empty check with `WAYLAND_DISPLAY`
+      # - use `wayland` instead of `auto` because --ozone-platform-hint=auto still prefers X over wayland when both are available
+      # alternatively, set env var: `ELECTRON_OZONE_PLATFORM_HINT=wayland` and ignore all of this
+      installPhase = lib.replaceStrings
+        [ "NIXOS_OZONE_WL" "--ozone-platform-hint=auto" ]
+        [ "WAYLAND_DISPLAY" "--ozone-platform-hint=wayland" ]
+        upstream.installPhase
+      ;
+    });
     suggestedPrograms = [
       "gnome-keyring"
-      "xwayland"
     ];
 
+    buildCost = 1;
+
     sandbox.method = "bwrap";
     sandbox.net = "clearnet";
     sandbox.whitelistAudio = true;

hosts/common/programs/engrampa.nix

@@ -0,0 +1,17 @@
+{ pkgs, ... }:
+{
+  sane.programs."mate.engrampa" = {
+    packageUnwrapped = pkgs.rmDbusServices pkgs.mate.engrampa;
+    sandbox.method = "bwrap";  # TODO:sandbox: untested
+    sandbox.whitelistWayland = true;
+    sandbox.autodetectCliPaths = "existingOrParent";
+    sandbox.extraHomePaths = [
+      "archive"
+      "Books/local"
+      "Books/servo"
+      "records"
+      "ref"
+      "tmp"
+    ];
+  };
+}

hosts/common/programs/epiphany.nix

@@ -23,6 +23,8 @@
       "tmp"
     ];
 
+    buildCost = 2;
+
     # XXX(2023/07/08): running on moby without `WEBKIT_DISABLE_SANDBOX...` fails, with:
     # - `bwrap: Can't make symlink at /var/run: File exists`
     # this could be due to:

hosts/common/programs/evince.nix

@@ -1,6 +1,8 @@
 { ... }:
 {
   sane.programs.evince = {
+    buildCost = 1;
+
     sandbox.method = "bwrap";
     sandbox.autodetectCliPaths = true;
     sandbox.whitelistWayland = true;

hosts/common/programs/fcitx5.nix

@@ -24,10 +24,7 @@
 #   - nixpkgs has a few themes: `fcitx5-{material-color,nord,rose-pine}`
 #   - NUR has a few themes
 #   - <https://github.com/catppuccin/fcitx5>
-{ config, lib, pkgs, ... }:
-let
-  cfg = config.sane.programs.fcitx5;
-in
+{ lib, pkgs, ... }:
 {
   sane.programs.fcitx5 = {
     packageUnwrapped = pkgs.fcitx5-with-addons.override {
@@ -100,15 +97,8 @@ in
 
     services.fcitx5 = {
       description = "fcitx5: input method (IME) for emoji/internationalization";
-      after = [ "graphical-session.target" ];
-      wantedBy = [ "graphical-session.target" ];
-
-      serviceConfig = {
-        ExecStart="${cfg.package}/bin/fcitx5";
-        Type = "simple";
-        Restart = "always";
-        RestartSec = "10s";
-      };
+      partOf = [ "graphical-session" ];
+      command = "fcitx5";
     };
 
     env.XMODIFIERS = "@im=fcitx";

hosts/common/programs/feedbackd.nix

@@ -96,18 +96,16 @@ in
 
     services.feedbackd = {
       description = "feedbackd audio/vibration/led controller";
-      wantedBy = [ "default.target" ];  #< should technically be `sound.target`, but that doesn't seem to get auto-started?
-      serviceConfig = {
-        ExecStart = "${cfg.package}/libexec/feedbackd";
-        Type = "simple";
-        Restart = "on-failure";
-        RestartSec = "10s";
-      };
-      environment = {
-        G_MESSAGES_DEBUG = "all";
-      } // (lib.optionalAttrs cfg.config.proxied {
-        FEEDBACK_THEME = "/home/colin/.config/feedbackd/themes/proxied.json";
-      });
+      depends = [ "sound" ];
+      partOf = [ "default" ];
+      command = lib.concatStringsSep " " ([
+        "env"
+        "G_MESSAGES_DEBUG=all"
+      ] ++ lib.optionals cfg.config.proxied [
+        "FEEDBACK_THEME=$HOME/.config/feedbackd/themes/proxied.json"
+      ] ++ [
+        "${cfg.package}/libexec/feedbackd"
+      ]);
     };
   };
 

hosts/common/programs/firefox.nix

@@ -207,6 +207,10 @@ in
           package = pkgs.firefox-extensions.i2p-in-private-browsing;
           enable = lib.mkDefault config.services.i2p.enable;
         };
+        i-still-dont-care-about-cookies = {
+          package = pkgs.firefox-extensions.i-still-dont-care-about-cookies;
+          enable = lib.mkDefault true;
+        };
         open-in-mpv = {
           # test: `open-in-mpv 'mpv:///open?url=https://www.youtube.com/watch?v=dQw4w9WgXcQ'`
           package = pkgs.firefox-extensions.open-in-mpv;
@@ -310,8 +314,8 @@ in
           // scrollbar configuration, see: <https://artemis.sh/2023/10/12/scrollbars.html>
           // style=4 gives rectangular scrollbars
           // could also enable "always show scrollbars" in about:preferences -- not sure what the actual pref name for that is
-          // note that too-large scrollbars (like 50px wide) tend to obscure content (and make buttons unclickable)
-          defaultPref("widget.non-native-theme.scrollbar.size.override", 20);
+          // note that too-large scrollbars (like 50px wide, even 20px) tend to obscure content (and make buttons unclickable)
+          defaultPref("widget.non-native-theme.scrollbar.size.override", 14);
           defaultPref("widget.non-native-theme.scrollbar.style", 4);
 
           // disable inertial/kinetic/momentum scrolling because it just gets in the way on touchpads

hosts/common/programs/fontconfig.nix

@@ -30,6 +30,30 @@ let
   nerdfontPkgs = builtins.map
     (f: pkgs.nerdfonts.override { fonts = [ f ]; })
     wantedNerdfonts;
+
+  # see: <repo:nixos/nixpkgs:nixos/modules/config/fonts/fontconfig.nix>
+  # and: <repo:nixos/nixpkgs:pkgs/development/libraries/fontconfig/make-fonts-cache.nix>
+  # nixpkgs creates a fontconfig cache, but only when *not* cross compiling.
+  # but the alternative is that fonts are cached purely at runtime, in ~/.cache/fontconfig,
+  # and that needs to either be added to the sandbox of *every* app,
+  # or font-heavy apps are several *seconds* slower to launch.
+  #
+  # TODO: upstream this into `make-fonts-cache.nix`?
+  cache = (pkgs.makeFontsCache { fontDirectories = config.fonts.packages; }).overrideAttrs (upstream: {
+    buildCommand = lib.replaceStrings
+      [ "fc-cache" ]
+      [ "${pkgs.stdenv.hostPlatform.emulator pkgs.buildPackages} ${pkgs.fontconfig.bin}/bin/fc-cache" ]
+      upstream.buildCommand
+    ;
+  });
+  cacheConf = pkgs.writeTextDir "etc/fonts/conf.d/01-nixos-cache-cross.conf" ''
+    <?xml version='1.0'?>
+    <!DOCTYPE fontconfig SYSTEM 'urn:fontconfig:fonts.dtd'>
+    <fontconfig>
+      <!-- Pre-generated font caches -->
+      <cachedir>${cache}</cachedir>
+    </fontconfig>
+  '';
 in
 {
   sane.programs.fontconfig = {
@@ -64,6 +88,8 @@ in
         "DejaVu Sans"
       ];
     };
+    # nixpkgs builds a cache file, but only for non-cross. i want it always, so add my own cache -- but ONLY for cross.
+    fontconfig.confPackages = lib.mkIf (pkgs.stdenv.hostPlatform != pkgs.stdenv.buildPlatform) [ cacheConf ];
     #vvv enables dejavu_fonts, freefont_ttf, gyre-fonts, liberation_ttf, unifont, noto-fonts-emoji
     enableDefaultPackages = false;
     packages = with pkgs; [

hosts/common/programs/fractal.nix

@@ -59,26 +59,19 @@ in
 
     persist.byStore.private = [
       # XXX by default fractal stores its state in ~/.local/share/<build-profile>/<UUID>.
-      ".local/share/hack"    # for debug-like builds
-      ".local/share/stable"  # for normal releases
-      ".local/share/fractal" # for version 5+, i think?
+      # ".local/share/hack"    # for debug-like builds
+      # ".local/share/stable"  # for normal releases
+      ".local/share/fractal" # for version 5+
     ];
 
     suggestedPrograms = [ "gnome-keyring" ];
 
     services.fractal = {
       description = "fractal Matrix client";
-      after = [ "graphical-session.target" ];
-      # partOf = [ "graphical-session.target" ];
-      wantedBy = lib.mkIf cfg.config.autostart [ "graphical-session.target" ];
+      partOf = lib.mkIf cfg.config.autostart [ "graphical-session" ];
 
-      serviceConfig = {
-        ExecStart = "${cfg.package}/bin/fractal";
-        Type = "simple";
-        Restart = "always";
-        RestartSec = "20s";
-      };
-      # environment.G_MESSAGES_DEBUG = "all";
+      # env "G_MESSAGES_DEBUG=all"
+      command = "fractal";
     };
   };
 }

hosts/common/programs/frozen-bubble.nix

@@ -2,11 +2,6 @@
 { pkgs, ... }:
 {
   sane.programs.frozen-bubble = {
-    sandbox.method = "bwrap";
-    sandbox.net = "clearnet";  # net play
-    sandbox.whitelistAudio = true;
-    sandbox.whitelistWayland = true;
-
     packageUnwrapped = pkgs.frozen-bubble.overrideAttrs (upstream: {
       # patch so it stores its dot-files not in root ~.
       postPatch = (upstream.postPatch or "") + ''
@@ -14,6 +9,12 @@
           --replace-fail '$FBHOME   = "$ENV{HOME}/.frozen-bubble"' '$FBHOME   = "$ENV{HOME}/.local/share/frozen-bubble"'
       '';
     });
+    buildCost = 1;
+
+    sandbox.method = "bwrap";
+    sandbox.net = "clearnet";  # net play
+    sandbox.whitelistAudio = true;
+    sandbox.whitelistWayland = true;
 
     persist.byStore.plaintext = [
       ".local/share/frozen-bubble"  # preferences, high scores

hosts/common/programs/g4music.nix

@@ -8,6 +8,8 @@
 { ... }:
 {
   sane.programs.g4music = {
+    buildCost = 1;
+
     sandbox.method = "bwrap";
     sandbox.whitelistAudio = true;
     sandbox.whitelistDbus = [ "user" ];  # mpris

hosts/common/programs/geary.nix

@@ -37,7 +37,7 @@ in
     # fs.".config/geary".dir = {};
     # fs.".local/share/folks".dir = {};
 
-    slowToBuild = true;  # uses webkitgtk 4.1
+    buildCost = 3;  # uses webkitgtk 4.1
     persist.byStore.private = [
       # attachments, and email -- contained in a sqlite db
       ".local/share/geary"
@@ -87,16 +87,8 @@ in
 
     services.geary = {
       description = "geary email client";
-      after = [ "graphical-session.target" ];
-      # partOf = [ "graphical-session.target" ];
-      wantedBy = lib.mkIf cfg.config.autostart [ "graphical-session.target" ];
-
-      serviceConfig = {
-        ExecStart = "${cfg.package}/bin/geary";
-        Type = "simple";
-        Restart = "always";
-        RestartSec = "20s";
-      };
+      partOf = lib.mkIf cfg.config.autostart [ "graphical-session" ];
+      command = "geary";
     };
   };
 

hosts/common/programs/gnome-keyring/default.nix

@@ -1,14 +1,12 @@
-{ config, lib, pkgs, ... }:
-let
-  cfg = config.sane.programs.gnome-keyring;
-in
+{ lib, pkgs, ... }:
 {
   sane.programs.gnome-keyring = {
     packageUnwrapped = pkgs.rmDbusServices pkgs.gnome.gnome-keyring;
     sandbox.method = "bwrap";
     sandbox.whitelistDbus = [ "user" ];
     sandbox.extraRuntimePaths = [
-      "keyring/control"
+      "keyring"  #< only needs keyring/control, but has to *create* that.
+      # "keyring/control"
     ];
     sandbox.capabilities = [
       # ipc_lock: used to `mlock` the secrets so they don't get swapped out.
@@ -28,9 +26,9 @@ in
     fs.".local/share/keyrings/default" = {
       file.text = "Default_keyring.keyring";  #< no trailing newline
       # wantedBy = [ config.sane.fs."${config.sane.persist.stores.private.origin}".unit ];
-      wantedBeforeBy = [  #< don't create this as part of `multi-user.target`
-        "gnome-keyring.service"  # TODO: sane.programs should declare this dependency for us
-      ];
+      # wantedBeforeBy = [  #< don't create this as part of `multi-user.target`
+      #   "gnome-keyring.service"  # TODO: sane.programs should declare this dependency for us
+      # ];
     };
     # N.B.: certain keyring names have special significance
     # `login.keyring` is forcibly encrypted to the user's password, so that pam gnome-keyring can unlock it on login.
@@ -43,21 +41,20 @@ in
         lock-after=false
       '';
       # wantedBy = [ config.sane.fs."${config.sane.persist.stores.private.origin}".unit ];
-      wantedBeforeBy = [  #< don't create this as part of `multi-user.target`
-        "gnome-keyring.service"
-      ];
+      # wantedBeforeBy = [  #< don't create this as part of `multi-user.target`
+      #   "gnome-keyring.service"
+      # ];
     };
 
     services.gnome-keyring = {
       description = "gnome-keyring-daemon: secret provider";
-      after = [ "graphical-session.target" ];
-      wantedBy = [ "graphical-session.target" ];
-      serviceConfig = {
-        ExecStart = "${cfg.package}/bin/gnome-keyring-daemon --start --foreground --components=secrets";
-        Type = "simple";
-        Restart = "always";
-        RestartSec = "20s";
-      };
+      partOf = [ "graphical-session" ];
+      command = let
+        gkr-start = pkgs.writeShellScriptBin "gnome-keyring-daemon-start" ''
+          mkdir -m 0700 -p $XDG_RUNTIME_DIR/keyring
+          exec gnome-keyring-daemon --start --foreground --components=secrets
+        '';
+      in "${gkr-start}/bin/gnome-keyring-daemon-start";
     };
   };
 }

hosts/common/programs/gnome-weather.nix

@@ -3,6 +3,8 @@
 { ... }:
 {
   sane.programs."gnome.gnome-weather" = {
+    buildCost = 1;
+
     sandbox.method = "bwrap";
     sandbox.wrapperType = "inplace";  #< /share/org.gnome.Weather/org.gnome.Weather file refers to bins by full path
     sandbox.whitelistWayland = true;

hosts/common/programs/go2tv.nix

@@ -2,8 +2,20 @@
 # - turn the tv off and on again (no, really...)
 #
 # SANITY CHECKS:
-# - `go2tv -u 'https://uninsane.org/share/AmenBreak.mp4'`
+# - `go2tv -u 'https://uninsane.org/share/Milkbags/AmenBreak.mp4'`
 #   - LGTV: works, but not seekable
+#   - Samsung: "Cannot play video."
+# - `go2tv -v /mnt/servo/media/Videos/Milkbags/AmenBreak.mp4`
+#   - Samsung: works
+# - `go2tv -v /mnt/servo/media/Videos/Milkbags/COLIN.webm`
+#   - Samsung: works
+# - `go2tv -v /mnt/servo/media/Videos/Shows/Lucky.Star/S01/S01E01-The.Girl.who.Dashes.Off.mkv`
+#   - Samsung: error 500
+# - `go2tv -tc -v /mnt/servo/media/Videos/Shows/Lucky.Star/S01/S01E01-The.Girl.who.Dashes.Off.mkv`
+#   - Samsung: error 500
+#   - note that it still advertized .mkv to the TV
+# - `cp /mnt/servo/media/Videos/Shows/Lucky.Star/S01/S01E01-The.Girl.who.Dashes.Off.mkv S01E01-The.Girl.who.Dashes.Off.mp4 && go2tv -v S01E01-The.Girl.who.Dashes.Off.mp4`
+#   - Samsung: WORKS
 # - `go2tv -u 'https://youtu.be/p3G5IXn0K7A'`
 #   - LGTV: FAILS ("this file cannot be recognized")
 #     - no fix via transcoding, altering the URI, etc.
@@ -17,6 +29,8 @@
 #   - LGTV: works
 #
 # WHEN TO TRANSCODE:
+# - mkv container + *:
+#   - Samsung: rename to .mp4 and cast that: no need to transcode
 # - mkv container + mpeg-2 video + AC-3/48k stereo audio:
 #   - LGTV: no transcoding needed
 # - mkv container + H.264 video + AAC/48k 5.1 audio:
@@ -27,6 +41,7 @@
 #   - LGTV: no transcoding needed
 # - mkv container + H.265 video + E-AC-3/48k stereo audio:
 #   - LGTV: no transcoding needed
+#
 { config, lib, pkgs, ... }:
 let
   cfg = config.sane.programs.go2tv;

hosts/common/programs/gvfs.nix

@@ -0,0 +1,20 @@
+# gvfs is used by e.g. nautilus to mount remote filesystems (ftp://, etc)
+# TODO: gvfs depends on udisks, depends on gnupg,
+# and as part of this `keyboxd` gpg daemon gets started and does background work every minute even though i totally don't use it.
+{ config, pkgs, ... }:
+let
+  cfg = config.sane.programs.gvfs;
+in
+{
+  sane.programs.gvfs = {
+    packageUnwrapped = pkgs.gvfs.override {
+      # i don't need to mount samba shares, and samba build is expensive/flaky (mostly for cross, but even problematic on native)
+      samba = null;
+    };
+  };
+
+  services.gvfs = {
+    inherit (cfg) package;
+    enable = cfg.enabled;
+  };
+}

hosts/common/programs/handbrake.nix

@@ -1,6 +1,8 @@
 { pkgs, ... }:
 {
   sane.programs.handbrake = {
+    buildCost = 1;
+
     sandbox.method = "landlock";  #< also supports bwrap, but landlock ensures we don't write to non-mounted tmpfs dir
     sandbox.whitelistDbus = [ "user" ];  # notifications
     sandbox.whitelistWayland = true;
@@ -15,7 +17,7 @@
 
     # disable expensive sambda dependency; i don't use it.
     packageUnwrapped = pkgs.handbrake.override {
-      ffmpeg_5-full = pkgs.ffmpeg_5-full.override {
+      ffmpeg-full = pkgs.ffmpeg-full.override {
         withSamba = false;
       };
     };

hosts/common/programs/htop/default.nix

@@ -0,0 +1,11 @@
+{ ... }:
+{
+  sane.programs.htop = {
+    sandbox.method = "landlock";
+    sandbox.extraPaths = [
+      "/proc"
+      "/sys/devices"
+    ];
+    fs.".config/htop/htoprc".symlink.target = ./htoprc;
+  };
+}

hosts/common/programs/htop/htoprc

@@ -0,0 +1,63 @@
+# Beware! This file is rewritten by htop when settings are changed in the interface.
+# The parser is also very primitive, and not human-friendly.
+htop_version=3.3.0
+config_reader_min_version=3
+fields=0 48 6 18 39 130 2 46 47 49 1
+hide_kernel_threads=1
+hide_userland_threads=0
+hide_running_in_container=0
+shadow_other_users=0
+show_thread_names=0
+show_program_path=0
+highlight_base_name=0
+highlight_deleted_exe=1
+shadow_distribution_path_prefix=0
+highlight_megabytes=1
+highlight_threads=1
+highlight_changes=0
+highlight_changes_delay_secs=5
+find_comm_in_cmdline=1
+strip_exe_from_cmdline=1
+show_merged_command=0
+header_margin=1
+screen_tabs=1
+detailed_cpu_time=0
+cpu_count_from_one=0
+show_cpu_usage=1
+show_cpu_frequency=0
+show_cpu_temperature=0
+degree_fahrenheit=0
+update_process_names=0
+account_guest_in_cpu_meter=0
+color_scheme=0
+enable_mouse=1
+delay=15
+hide_function_bar=0
+header_layout=two_67_33
+column_meters_0=AllCPUs Memory Swap Zram
+column_meter_modes_0=1 1 1 1
+column_meters_1=Systemd Uptime Tasks LoadAverage NetworkIO DiskIO
+column_meter_modes_1=2 2 2 2 2 2
+tree_view=0
+sort_key=46
+tree_sort_key=0
+sort_direction=-1
+tree_sort_direction=1
+tree_view_always_by_pid=0
+all_branches_collapsed=0
+screen:Main=PID USER TTY PRIORITY NICE M_RESIDENT M_PRIV STATE PERCENT_CPU PERCENT_MEM TIME Command
+.sort_key=PERCENT_CPU
+.tree_sort_key=PID
+.tree_view_always_by_pid=0
+.tree_view=0
+.sort_direction=-1
+.tree_sort_direction=1
+.all_branches_collapsed=0
+screen:I/O=PID USER IO_PRIORITY IO_RATE IO_READ_RATE IO_WRITE_RATE PERCENT_SWAP_DELAY PERCENT_IO_DELAY Command
+.sort_key=IO_RATE
+.tree_sort_key=PID
+.tree_view_always_by_pid=0
+.tree_view=0
+.sort_direction=-1
+.tree_sort_direction=1
+.all_branches_collapsed=0

hosts/common/programs/imagemagick.nix

@@ -1,6 +1,8 @@
 { pkgs, ... }:
 {
   sane.programs.imagemagick = {
+    buildCost = 1;
+
     sandbox.method = "bwrap";
     sandbox.wrapperType = "inplace";  # /etc/ImageMagick-7/delegates.xml refers to bins by absolute path
     sandbox.whitelistPwd = true;

hosts/common/programs/kdenlive.nix

@@ -1,6 +1,15 @@
 { pkgs, ... }:
 {
   sane.programs.kdenlive = {
+    packageUnwrapped = pkgs.kdenlive.override {
+      ffmpeg-full = pkgs.ffmpeg-full.override {
+        # avoid expensive samba build for a feature i don't use
+        withSamba = false;
+      };
+    };
+
+    buildCost = 1;
+
     sandbox.method = "bwrap";
     sandbox.extraHomePaths = [
       "Music"
@@ -14,12 +23,5 @@
     sandbox.whitelistDbus = [ "user" ];  # notifications
     sandbox.whitelistDri = true;
     sandbox.whitelistWayland = true;
-
-    packageUnwrapped = pkgs.kdenlive.override {
-      ffmpeg-full = pkgs.ffmpeg-full.override {
-        # avoid expensive samba build for a feature i don't use
-        withSamba = false;
-      };
-    };
   };
 }

hosts/common/programs/komikku.nix

@@ -16,6 +16,8 @@
     sandbox.whitelistDri = true;  #< required
     sandbox.whitelistWayland = true;
 
+    buildCost = 2;
+
     secrets.".local/share/komikku/keyrings/plaintext.keyring" = ../../../secrets/common/komikku_accounts.json.bin;
     # downloads end up here, and without the toplevel database komikku doesn't know they exist.
     persist.byStore.plaintext = [

hosts/common/programs/koreader/default.nix

@@ -47,6 +47,7 @@ in {
     packageUnwrapped = pkgs.koreader-from-src;
     sandbox.method = "bwrap";  # sandboxes fine under landlock too, except for FTP
     sandbox.net = "clearnet";
+    sandbox.whitelistDbus = [ "user" ];  # for opening the web browser via portal
     sandbox.whitelistDri = true;  # reduces startup time and subjective page flip time
     sandbox.whitelistWayland = true;
     sandbox.extraHomePaths = [

hosts/common/programs/lemoa.nix

@@ -1,6 +1,7 @@
 { ... }:
 {
   sane.programs.lemoa = {
+    buildCost = 1;
     sandbox.method = "bwrap";
     sandbox.net = "clearnet";
     sandbox.whitelistDbus = [ "user" ];  # for clicking links

hosts/common/programs/lftp.nix

@@ -0,0 +1,13 @@
+{ ... }:
+{
+  sane.programs.lftp = {
+    sandbox.method = "bwrap";
+    sandbox.net = "all";
+    sandbox.extraPaths = [
+      "Music"
+      "Videos/local"
+      "Videos/servo"
+      "tmp"
+    ];
+  };
+}

hosts/common/programs/libreoffice.nix

@@ -16,7 +16,7 @@
       "tmp"
     ];
 
-    slowToBuild = true;
+    buildCost = 3;
 
     # disable first-run stuff
     fs.".config/libreoffice/4/user/registrymodifications.xcu".symlink.text = ''

hosts/common/programs/loupe.nix

@@ -30,6 +30,7 @@
     ];
 
     mime.associations = {
+      "image/avif" = "org.gnome.Loupe.desktop";
       "image/gif" = "org.gnome.Loupe.desktop";
       "image/heif" = "org.gnome.Loupe.desktop";  # apple codec
       "image/png" = "org.gnome.Loupe.desktop";

hosts/common/programs/mako.nix

@@ -53,13 +53,8 @@
     # on environment.packages, but then logs are blackholed.
     services.mako = {
       description = "mako desktop notification daemon";
-      wantedBy = [ "graphical-session.target" ];
-
-      serviceConfig.ExecStart = "${config.sane.programs.mako.package}/bin/mako";
-      serviceConfig.Type = "simple";
-      # mako will predictably fail if launched before the wayland server is fully initialized
-      serviceConfig.Restart = "on-failure";
-      serviceConfig.RestartSec = "10s";
+      partOf = [ "graphical-session" ];
+      command = "${config.sane.programs.mako.package}/bin/mako";
     };
   };
 }

hosts/common/programs/megapixels.nix

@@ -1,6 +1,16 @@
-{ ... }:
+{ pkgs, ... }:
 {
   sane.programs.megapixels = {
+    packageUnwrapped = pkgs.megapixels.overrideAttrs (upstream: {
+      postPatch = (upstream.postPatch or "") + ''
+        # 2024/04/21: patch it to save photos in a more specific directory
+        substituteInPlace src/process_pipeline.c \
+          --replace-fail 'XDG_PICTURES_DIR' 'XDG_PHOTOS_DIR'
+        # 2024/04/21: patch it so the folder button works
+        substituteInPlace src/main.c \
+          --replace-fail 'g_get_user_special_dir(G_USER_DIRECTORY_PICTURES)' 'getenv("XDG_PHOTOS_DIR")'
+      '';
+    });
     # megapixels sandboxing is tough:
     # if misconfigured, preview will alternately be OK, black, or only 1/4 of it will be rendered -- with no obvious pattern.
     # adding all of ~ to the sandbox will sometimes (?) fix the flakiness, even when `strace` doesn't show it accessing any files...
@@ -16,10 +26,8 @@
     sandbox.extraHomePaths = [
       ".config/dconf"  #< else it segfaults during post-process
       # ".config/megapixels"
-      ".local/share/applications"  #< needed for viewing photos, until i can sort out the portal stuff
       ".cache/mesa_shader_cache"  # loads way faster
-      "tmp"
-      "Pictures"  #< TODO: make this Pictures/Photos and save photos there
+      "Pictures/Photos"
       # also it addresses a lot via relative path.
     ];
     sandbox.extraPaths = [
@@ -37,6 +45,12 @@
     sandbox.extraRuntimePaths = [
       "dconf"  #< else it's very spammy, and slow
     ];
+    sandbox.extraConfig = [
+      # XXX(2024/04/21): without this it fails to convert .dng -> .jpg.
+      #   "bwrap: open /proc/34/ns/ns failed: No such file or directory"
+      "--sane-sandbox-keep-namespace" "pid"
+    ];
+
     suggestedPrograms = [ "dconf" ];  #< not sure if necessary
   };
 }

hosts/common/programs/mimeo/default.nix

@@ -57,6 +57,7 @@ in
           desktopName = "Mimeo";
           exec = "mimeo %U";
           comment = "Open files by MIME-type or file name using regular expressions.";
+          noDisplay = true;
         })
       ];
 

hosts/common/programs/modemmanager.nix

@@ -0,0 +1,38 @@
+{ config, lib, pkgs, ... }:
+let
+  cfg = config.sane.programs.modemmanager;
+in
+{
+  sane.programs.modemmanager = {
+    # mmcli needs /run/current-system/sw/share/dbus-1 files to function
+    enableFor.system = lib.mkIf (builtins.any (en: en) (builtins.attrValues cfg.enableFor.user)) true;
+  };
+
+  systemd.services.ModemManager = lib.mkIf cfg.enabled {
+    aliases = [ "dbus-org.freedesktop.ModemManager1.service" ];
+    after = [ "polkit.service" ];
+    requires = [ "polkit.service" ];
+    wantedBy = [ "network.target" ];
+    serviceConfig = {
+      Type = "dbus";
+      BusName = "org.freedesktop.ModemManager1";
+      # only if started with `--debug` does mmcli let us issue AT commands like
+      # `mmcli --modem any --command=<AT_CMD>`
+      ExecStart = "${cfg.package}/bin/ModemManager --debug";
+      # --debug sets DEBUG level logging: so reset
+      ExecStartPost = "${cfg.package}/bin/mmcli --set-logging=INFO";
+
+      Restart = "on-abort";
+      StandardError = "null";
+      CapabilityBoundingSet = "CAP_SYS_ADMIN CAP_NET_ADMIN";
+      ProtectSystem = true;
+      ProtectHome = true;
+      PrivateTmp = true;
+      RestrictAddressFamilies = "AF_NETLINK AF_UNIX AF_QIPCRTR";
+      NoNewPrivileges = true;
+    };
+  };
+
+  # so that ModemManager can discover when the modem appears
+  services.udev.packages = lib.mkIf cfg.enabled [ cfg.package ];
+}

hosts/common/programs/mpv/default.nix

@@ -9,7 +9,18 @@
 # - list: <https://github.com/stax76/awesome-mpv>
 # - list: <https://nudin.github.io/mpv-script-directory/>
 # - browse DLNA shares: <https://github.com/chachmu/mpvDLNA>
-# - act as a DLNS renderer (sink): <https://github.com/xfangfang/Macast>
+# - act as a DLNA renderer (sink): <https://github.com/xfangfang/Macast>
+# - update watch_later periodically -- not just on exit: <https://gist.github.com/CyberShadow/2f71a97fb85ed42146f6d9f522bc34ef>
+#   - <https://github.com/AN3223/dotfiles/blob/master/.config/mpv/scripts/auto-save-state.lua>
+# - touch shortcuts (double-tap L/R portions of window to seek, etc): <https://github.com/christoph-heinrich/mpv-touch-gestures>
+#   - <https://github.com/omeryagmurlu/mpv-gestures>
+# - jellyfin client: <https://github.com/EmperorPenguin18/mpv-jellyfin>
+#   - DLNA client (player only: no casting): <https://github.com/chachmu/mpvDLNA>
+# - search videos on Youtube: <https://github.com/rozari0/mpv-youtube-search>
+#   - <https://github.com/CogentRedTester/mpv-scripts/blob/master/youtube-search.lua>
+# - sponsorblock: <https://codeberg.org/jouni/mpv_sponsorblock_minimal>
+# - screenshot-to-clipboard: <https://github.com/zc62/mpv-scripts/blob/master/screenshot-to-clipboard.js>
+# - mpv-as-image-viewer: <https://github.com/guidocella/mpv-image-config>
 # debugging:
 # - enter console by pressing backtick.
 #   > `set volume 50`     -> sets application volume to 50%
@@ -17,6 +28,7 @@
 #   > `show-text "vol: ${volume}"`  -> get the volume
 # - show script output by running mpv with `--msg-level=all=trace`
 #   - and then just `print(...)` from lua & it'll show in terminal
+#   - requires that mpv.conf NOT include player-operation-mode=pseudo-gui
 # - invoke mpv with `--no-config` to have it not read ~/.config/mpv/*
 # - press `i` to show decoder info
 #
@@ -28,90 +40,152 @@
 let
   cfg = config.sane.programs.mpv;
   uosc = pkgs.mpvScripts.uosc.overrideAttrs (upstream: {
-    # patch so that the volume control corresponds to `ao-volume`, i.e. the system-wide volume.
-    # this is particularly nice for moby, because it avoids the awkwardness that system volume
-    # is hard to adjust while screen is on.
-    # note that only under alsa (`-ao=alsa`) does `ao-volume` actually correspond to system volume.
-    postPatch = (upstream.postPatch or "") + ''
-      substituteInPlace src/uosc/main.lua \
-        --replace-fail "mp.observe_property('volume'" "mp.observe_property('ao-volume'"
-      substituteInPlace src/uosc/elements/Volume.lua \
-        --replace-fail "mp.commandv('set', 'volume'" "mp.commandv('set', 'ao-volume'" \
-        --replace-fail "mp.set_property_native('volume'" "mp.set_property('ao-volume'"
+    version = "5.2.0-unstable-2024-03-13";
+    src = lib.warnIf (lib.versionOlder "5.2.0" upstream.version) "uosc outdated; remove patch?" pkgs.fetchFromGitHub {
+      owner = "tomasklaen";
+      repo = "uosc";
+      rev = "6fa34c31d0a5290dee83282205768d15111df7d8";
+      hash = "sha256-qxyNZHmH33bKRp4heFSC+RtvSApIfbVFt4otfS351nE=";
+    };
+    # src = pkgs.fetchFromGitea {
+    #   domain = "git.uninsane.org";
+    #   owner = "colin";
+    #   repo = "uosc";
+    #   rev = "dev-sane-5.2.0";
+    #   hash = "sha256-lpqk4nnCxDZr/Y7/seM4VyR30fVrDAT4VP7C8n88lvA=";
+    # };
 
-      # `ao-volume` isn't actually an observable property.
-      # as of 2024/03/02, they *may* be working on that:
-      # - <https://github.com/mpv-player/mpv/pull/13604#issuecomment-1971665736>
-      # in the meantime, just query the volume every tick (i.e. frame).
-      # alternative is mpv's JSON IPC feature, where i could notify its socket whenever pipewire volume changes.
-      cat <<EOF >> src/uosc/main.lua
-      function update_ao_volume()
-        local vol = mp.get_property('ao-volume')
-        if vol ~= nil then
-          vol = tonumber(vol)
-          if vol ~= state.volume then
-            set_state('volume', vol)
-            request_render()
-          end
-        end
-      end
-      -- tick seems to occur on every redraw (even when volume is hidden).
-      -- in practice: for every new frame of the source, or whenever the cursor is moved.
-      mp.register_event('tick', update_ao_volume)
-      -- if paused and cursor isn't moving, then `tick` isn't called. fallback to a timer.
-      mp.add_periodic_timer(2, update_ao_volume)
-      -- invoke immediately to ensure state.volume is non-nil
-      update_ao_volume()
-      if state.volume == nil then
-        state.volume = 0
-      end
-      EOF
+    postPatch = (upstream.postPatch or "") + ''
+      ### patch so touch controls work well with sway 1.9+
+      ### in particular, "mouse.hover" is *always* false for touch events (i guess this is a bug in mpv?)
+      ### and a touch release event is always followed by a mouse move to the cursor (that's a sway thing) which doesn't make sense.
+      # 1. always listen for mbtn_left events, even before a hover event would activate a zone:
+      substituteInPlace src/uosc/lib/cursor.lua \
+        --replace-fail \
+          "if binding and cursor:collides_with(zone.hitbox)" \
+          "if binding"
+      # 2. uosc already simulates mouse movements on touch down, but because of the hover handling, they get misunderstood as mouse leaves.
+      #    so, bypass the cursor:leave() check.
+      substituteInPlace src/uosc/lib/cursor.lua \
+        --replace-fail \
+          "handle_mouse_pos(nil, mp.get_property_native('mouse-pos'))" \
+          "local mpos = mp.get_property_native('mouse-pos')
+           cursor:move(mpos.x, mpos.y)
+           cursor.hover_raw = mpos.hover"
+      # 3. explicitly fire a cursor:leave on touch release, so that all zones are deactivated (and control visibility goes back to default state)
+      substituteInPlace src/uosc/lib/cursor.lua \
+        --replace-fail \
+          "cursor:create_handler('primary_up')" \
+          "function(...)
+             cursor:trigger('primary_up', ...)
+             if not cursor.hover_raw then
+               cursor:leave()
+             end
+           end"
+      # 4. sometimes we get a touch movement shortly AFTER touch is released:
+      #    detect that and ignore it
+      substituteInPlace src/uosc/lib/cursor.lua \
+        --replace-fail \
+          "cursor:move(mouse.x, mouse.y)" \
+          "local last_down = cursor.last_event['primary_down'] or { time = 0 }
+           local last_up = cursor.last_event['primary_up'] or { time = 0 }
+           if cursor.hover_raw or last_down.time >= last_up.time then cursor:move(mouse.x, mouse.y) end"
+
+      ### patch so that uosc volume control is routed to sane_sysvol.
+      ### this is particularly nice for moby, because it avoids the awkwardness that system volume
+      ### is hard to adjust while screen is on.
+      ### previously i used ao-volume instead of sane_sysvol: but that forced `ao=alsa`
+      ### and came with heavy perf penalties (especially when adjusting the volume)
+      substituteInPlace src/uosc/main.lua \
+        --replace-fail \
+          "mp.observe_property('volume'" \
+          "mp.observe_property('user-data/sane_sysvol/volume'" \
+        --replace-fail \
+          "mp.observe_property('mute'" \
+          "mp.observe_property('user-data/sane_sysvol/mute'"
+      substituteInPlace src/uosc/elements/Volume.lua \
+        --replace-fail \
+          "mp.commandv('set', 'volume'" \
+          "mp.set_property_number('user-data/sane_sysvol/volume'" \
+        --replace-fail \
+          "mp.set_property_native('volume'" \
+          "mp.set_property_number('user-data/sane_sysvol/volume'" \
+        --replace-fail \
+          "mp.set_property_native('mute'" \
+          "mp.set_property_bool('user-data/sane_sysvol/mute'" \
+        --replace-fail \
+          "mp.commandv('cycle', 'mute')" \
+          "mp.set_property_bool('user-data/sane_sysvol/mute', not mp.get_property_bool('user-data/sane_sysvol/mute'))"
+
+      # tweak the top-bar "maximize" button to actually act as a "fullscreen" button.
+      substituteInPlace src/uosc/elements/TopBar.lua \
+        --replace-fail \
+          'get_maximized_command,' \
+          '"cycle fullscreen",'
     '';
   });
+  mpv-unwrapped = pkgs.mpv-unwrapped.overrideAttrs (upstream: {
+    version = "0.37.0-unstable-2024-03-31";
+    src = lib.warnIf (lib.versionOlder "0.37.0" upstream.version) "mpv outdated; remove patch?" pkgs.fetchFromGitHub {
+      owner = "mpv-player";
+      repo = "mpv";
+      rev = "4ce4bf1795e6dfd6f1ddf07fb348ce5d191ab1dc";
+      hash = "sha256-nOGuHq7SWDAygROV7qHtezDv1AsMpseImI8TVd3F+Oc=";
+    };
+    patches = [];
+  });
 in
 {
   sane.programs.mpv = {
-    packageUnwrapped = with pkgs; wrapMpv mpv-unwrapped {
-      scripts = [
-        mpvScripts.mpris
-        mpvScripts.mpv-playlistmanager
-        uosc
-        # pkgs.mpv-uosc-latest
-      ];
-      # extraMakeWrapperArgs = lib.optionals (cfg.config.vo != null) [
-      #   # 2023/08/29: fixes an error where mpv on moby launches with the message
-      #   #   "DRM_IOCTL_MODE_CREATE_DUMB failed: Cannot allocate memory"
-      #   #   audio still works, and controls, screenshotting, etc -- just not the actual rendering
-      #   #
-      #   #   this is likely a regression for mpv 0.36.0.
-      #   #   the actual error message *appears* to come from the mesa library, but it's tough to trace.
-      #   #
-      #   # 2024/03/02: no longer necessary, with mesa 23.3.1: <https://github.com/NixOS/nixpkgs/pull/265740>
-      #   #
-      #   # backend compatibility (2023/10/22):
-      #   # run with `--vo=help` to see a list of all output options.
-      #   # non-exhaustive (W=works, F=fails, A=audio-only, U=audio+ui only (no video))
-      #   # ? null             Null video output
-      #   # A (default)
-      #   # A dmabuf-wayland   Wayland dmabuf video output
-      #   # A libmpv           render API for libmpv  (mpv plays the audio, but doesn't even render a window)
-      #   # A vdpau            VDPAU with X11
-      #   # F drm              Direct Rendering Manager (software scaling)
-      #   # F gpu-next         Video output based on libplacebo
-      #   # F vaapi            VA API with X11
-      #   # F x11              X11 (software scaling)
-      #   # F xv               X11/Xv
-      #   # U gpu              Shader-based GPU Renderer
-      #   # W caca             libcaca  (terminal rendering)
-      #   # W sdl              SDL 2.0 Renderer
-      #   # W wlshm            Wayland SHM video output (software scaling)
-      #   "--add-flags" "--vo=${cfg.config.vo}"
-      # ];
-    };
+    packageUnwrapped = pkgs.wrapMpv
+      (mpv-unwrapped.override rec {
+        # N.B.: populating `self` to `luajit` is necessary for the resulting `lua.withPackages` function to preserve my override.
+        # i use enable52Compat in order to get `table.unpack`.
+        # i think using `luajit` here instead of `lua` is optional, just i get better perf with it :)
+        lua = pkgs.luajit.override { enable52Compat = true; self = lua; };
+      })
+      {
+        scripts = [
+          pkgs.mpvScripts.mpris
+          pkgs.mpvScripts.mpv-playlistmanager
+          uosc
+          # pkgs.mpv-uosc-latest
+        ];
+        # extraMakeWrapperArgs = lib.optionals (cfg.config.vo != null) [
+        #   # 2023/08/29: fixes an error where mpv on moby launches with the message
+        #   #   "DRM_IOCTL_MODE_CREATE_DUMB failed: Cannot allocate memory"
+        #   #   audio still works, and controls, screenshotting, etc -- just not the actual rendering
+        #   #
+        #   #   this is likely a regression for mpv 0.36.0.
+        #   #   the actual error message *appears* to come from the mesa library, but it's tough to trace.
+        #   #
+        #   # 2024/03/02: no longer necessary, with mesa 23.3.1: <https://github.com/NixOS/nixpkgs/pull/265740>
+        #   #
+        #   # backend compatibility (2023/10/22):
+        #   # run with `--vo=help` to see a list of all output options.
+        #   # non-exhaustive (W=works, F=fails, A=audio-only, U=audio+ui only (no video))
+        #   # ? null             Null video output
+        #   # A (default)
+        #   # A dmabuf-wayland   Wayland dmabuf video output
+        #   # A libmpv           render API for libmpv  (mpv plays the audio, but doesn't even render a window)
+        #   # A vdpau            VDPAU with X11
+        #   # F drm              Direct Rendering Manager (software scaling)
+        #   # F gpu-next         Video output based on libplacebo
+        #   # F vaapi            VA API with X11
+        #   # F x11              X11 (software scaling)
+        #   # F xv               X11/Xv
+        #   # U gpu              Shader-based GPU Renderer
+        #   # W caca             libcaca  (terminal rendering)
+        #   # W sdl              SDL 2.0 Renderer
+        #   # W wlshm            Wayland SHM video output (software scaling)
+        #   "--add-flags" "--vo=${cfg.config.vo}"
+        # ];
+      };
 
     suggestedPrograms = [
       "blast-to-default"
-      "go2tv"
+      "sane-cast"
+      "sane-die-with-parent"
       "xdg-terminal-exec"
     ];
 
@@ -124,7 +198,7 @@ in
     sandbox.whitelistWayland = true;
     sandbox.extraHomePaths = [
       ".config/mpv"  #< else mpris plugin crashes on launch
-      ".local/share/applications"  #< for xdg-terminal-exec (go2tv)
+      ".local/share/applications"  #< for xdg-terminal-exec (sane-cast)
       # it's common for album (or audiobook, podcast) images/lyrics/metadata to live adjacent to the primary file.
       # CLI detection is too poor to pick those up, so expose the common media dirs to the sandbox to make that *mostly* work.
       "Books/local"
@@ -139,7 +213,9 @@ in
       # for `watch_later`
       ".local/state/mpv"
     ];
-    fs.".config/mpv/scripts/sane/main.lua".symlink.target = ./sane-main.lua;
+    fs.".config/mpv/scripts/sane_cast/main.lua".symlink.target = ./sane_cast/main.lua;
+    fs.".config/mpv/scripts/sane_sysvol/main.lua".symlink.target = ./sane_sysvol/main.lua;
+    fs.".config/mpv/scripts/sane_sysvol/non_blocking_popen.lua".symlink.target = ./sane_sysvol/non_blocking_popen.lua;
     fs.".config/mpv/input.conf".symlink.target = ./input.conf;
     fs.".config/mpv/mpv.conf".symlink.target = ./mpv.conf;
     fs.".config/mpv/script-opts/osc.conf".symlink.target = ./osc.conf;

hosts/common/programs/mpv/input.conf

@@ -9,6 +9,8 @@
 POWER ignore
 VOLUME_UP ignore
 VOLUME_DOWN ignore
+# disable "double-click to toggle fullscreen", else that limits the rate at which i can seek
+MBTN_LEFT_DBL ignore
 
 # uosc menu
 # text after the shebang is parsed by uosc to construct the menu and names
@@ -31,7 +33,5 @@ ctrl+s      async screenshot                       #! Utils > Screenshot
 alt+i       script-binding uosc/keybinds           #! Utils > Key bindings
 O           script-binding uosc/show-in-directory  #! Utils > Show in directory
 #           script-binding uosc/open-config-directory #! Utils > Open config directory
-ctrl+r      script-binding sane/blast              #! Audiocast
-ctrl+t      script-binding sane/go2tv-video        #! Cast
-#           script-binding sane/go2tv-stream       #! Cast (...) > Stream
-#           script-binding sane/go2tv-gui          #! Cast (...) > GUI
+ctrl+r      script-binding sane_cast/blast              #! Audiocast
+ctrl+t      script-binding sane_cast/sane-cast          #! Cast

hosts/common/programs/mpv/mpv.conf

@@ -10,7 +10,9 @@ keep-open-pause=no
 
 # force GUI, even for tracks w/o album art
 # see: <https://www.reddit.com/r/mpv/comments/rvrrpt/oscosdgui_and_arch_linux/>
-player-operation-mode=pseudo-gui
+# player-operation-mode=pseudo-gui
+# actually, prefer just a subset of what's enabled by pseudo-gui, else logging breaks
+force-window=yes
 
 # use uosc instead (for On Screen Controls)
 osc=no
@@ -19,8 +21,8 @@ osd-bar=no
 # uosc will draw its own window controls if you disable window border
 border=no
 
-# ao=alsa so that uosc can work with ao-volume (see my uosc patch)
-ao=alsa
-# with `ao-volume`, the max actually is 100.
-# to go higher you'll have to use the system's native controls.
-volume-max=100
+# # ao=alsa so that uosc can work with ao-volume (see my uosc patch)
+# ao=alsa
+# # with `ao-volume`, the max actually is 100.
+# # to go higher you'll have to use the system's native controls.
+# volume-max=100

hosts/common/programs/mpv/sane-main.lua

@@ -1,34 +0,0 @@
-function subprocess(in_terminal, args)
-  if in_terminal then
-    args = { "xdg-terminal-exec", table.unpack(args) }
-  end
-  mp.command_native({
-    name = "subprocess",
-    args = args,
-    detach = false,
-    capture_stdout = false,
-    capture_stderr = false,
-    -- capture_size=0,
-    passthrough_stdin = false,
-    playback_only = false,
-  })
-end
-
-function invoke_go2tv(in_terminal, args)
-  mp.commandv("set", "pause", "yes")
-  subprocess(in_terminal, { "go2tv", table.unpack(args) })
-end
-
-function invoke_go2tv_on_open_file(mode)
-  local path = mp.get_property("stream-open-filename");
-  return invoke_go2tv(true, { mode, path })
-end
-
-mp.add_key_binding(nil, "blast", function() subprocess(false, { "blast-to-default" }) end)
-mp.add_key_binding(nil, 'go2tv-gui', function() invoke_go2tv(false, {}) end)
-mp.add_key_binding(nil, 'go2tv-video', function() invoke_go2tv_on_open_file("-v") end)
-mp.add_key_binding(nil, 'go2tv-stream', function() invoke_go2tv_on_open_file("-s") end)
-
--- uncomment for debugging:
--- if mpv fails to eval this script (e.g. syntax error), then it will fail to quit on launch
--- mp.command('quit')

hosts/common/programs/mpv/sane_cast/main.lua

@@ -0,0 +1,40 @@
+msg = require("mp.msg")
+msg.trace("load: begin")
+
+function subprocess(in_terminal, args)
+  if in_terminal then
+    args = { "xdg-terminal-exec", table.unpack(args) }
+  end
+  msg.info(table.concat(args, " "))
+  mp.command_native({
+    name = "subprocess",
+    args = args,
+    detach = false,
+    capture_stdout = false,
+    capture_stderr = false,
+    -- capture_size=0,
+    passthrough_stdin = false,
+    playback_only = false,
+  })
+end
+
+function invoke_paused(in_terminal, args)
+  mp.commandv("set", "pause", "yes")
+  for k, v in ipairs(args) do
+    if v == "@FILE@" then
+      args[k] = mp.get_property("stream-open-filename")
+    end
+  end
+  subprocess(in_terminal, args)
+end
+
+
+-- invoke blast in a way where it dies when we die, because:
+-- 1. when mpv exits, it `SIGKILL`s this toplevel subprocess.
+-- 2. `blast-to-default` could be a sandbox wrapper.
+-- 3. bwrap does not pass SIGKILL or SIGTERM to its child.
+-- 4. hence, to properly kill blast, we have to kill all the descendants.
+mp.add_key_binding(nil, "blast", function() subprocess(false, { "sane-die-with-parent", "--descendants", "--use-pgroup", "--catch-sigkill", "blast-to-default" }) end)
+mp.add_key_binding(nil, "sane-cast", function() invoke_paused(true, { "sane-cast", "--verbose", "@FILE@" }) end)
+
+msg.trace("load: complete")

hosts/common/programs/mpv/sane_sysvol/main.lua

@@ -0,0 +1,281 @@
+msg = require("mp.msg")
+msg.trace("load: begin")
+
+non_blocking_popen = require("non_blocking_popen")
+
+RD_SIZE = 65536
+
+function startswith(superstring, substring)
+  return superstring:sub(1, substring:len()) == substring
+end
+function strip_prefix(superstring, substring)
+  assert(startswith(superstring, substring))
+  return superstring:sub(1 + substring:len())
+end
+
+function ltrim(s)
+  -- remove all leading whitespace from `s`
+  local i = 1
+  while s:sub(i, i) == " " or s:sub(i, i) == "\t" do
+    i = i + 1
+  end
+  return s:sub(i)
+end
+
+function subprocess(args)
+  mp.command_native({
+    name = "subprocess",
+    args = args,
+    -- these arguments below probably don't matter: copied from sane_cast
+    detach = false,
+    capture_stdout = false,
+    capture_stderr = false,
+    passthrough_stdin = false,
+    playback_only = false,
+  })
+end
+
+function sysvol_new()
+  return {
+    -- sysvol is pipewire-native volume
+    -- it's the cube of the equivalent 0-100% value represented inside mpv
+    sysvol = nil,
+    sysmute = nil,
+    change_sysvol = function(self, mpv_vol)
+      -- called when mpv wants to set the system-wide volume
+      if mpv_vol == nil then
+        return
+      end
+
+      local old_mpv_vol = nil
+      if self.sysvol ~= nil then
+        old_mpv_vol = 100 * self.sysvol^(1/3)
+      end
+      if old_mpv_vol ~= nil and math.abs(mpv_vol - old_mpv_vol) < 1.0 then
+        -- avoid near-infinite loop where we react to our own volume change.
+        -- consider that we might be a couple messages behind in parsing pipewire when we issue this command,
+        -- hence a check on only the pipewire -> mpv side wouldn't prevent oscillation
+        msg.debug("NOT setting system-wide volume:", old_mpv_vol, volstr)
+        return
+      end
+
+      local volstr = tostring(mpv_vol) .. "%"
+      msg.debug("setting system-wide volume:", old_mpv_vol, volstr)
+      self.sysvol = (0.01*mpv_vol)^3
+      subprocess({
+        "wpctl",
+        "set-volume",
+        "@DEFAULT_AUDIO_SINK@",
+        volstr
+      })
+    end,
+    on_sysvol_change = function(self, sysvol)
+      -- called when the pipewire system volume is changed (either by us, or an external application)
+      if sysvol == nil then
+        return
+      end
+
+      local new_mpv_vol = 100 * sysvol^(1/3)
+      local old_mpv_vol = nil
+      if self.sysvol ~= nil then
+        old_mpv_vol = 100 * self.sysvol^(1/3)
+      end
+
+      if old_mpv_vol ~= nil and math.abs(new_mpv_vol - old_mpv_vol) < 1.0 then
+        -- avoid an infinite loop where we react to our own volume change
+        msg.debug("NOT announcing volume change to mpv (because it was what triggered the change):", old_mpv_vol, new_mpv_vol)
+        return
+      end
+
+      msg.debug("announcing volume change to mpv:", old_mpv_vol, new_mpv_vol)
+      self.sysvol = sysvol
+      mp.set_property_number("user-data/sane_sysvol/volume", new_mpv_vol)
+    end,
+    change_sysmute = function(self, mute)
+      if mute == nil then
+        return
+      end
+      if mute == self.sysmute then
+        msg.debug("NOT setting system-wide mute (because it didn't change)", mute)
+        return
+      end
+
+      local mutestr
+      if mute then
+        mutestr = "1"
+      else
+        mutestr = "0"
+      end
+      msg.debug("setting system-wide mute:", mutestr)
+      self.sysmute = mute
+      subprocess({
+        "wpctl",
+        "set-mute",
+        "@DEFAULT_AUDIO_SINK@",
+        mutestr
+      })
+    end,
+    on_sysmute_change = function(self, mute)
+      if mute == nil then
+        return
+      end
+
+      msg.debug("announcing mute to mpv:", mute)
+      self.sysmute = mute
+      mp.set_property_bool("user-data/sane_sysvol/mute", mute)
+    end
+  }
+end
+
+function pwmon_parser_new()
+  return {
+    -- volume: pipewire-native volume. usually 0.0 - 1.0, but can go higher (e.g. 3.25)
+    -- `wpctl get-volume` and this volume are related, in that the volume reported by
+    -- wpctl is the cube-root of this one.
+    volume = nil, -- number
+    mute = nil, -- bool
+
+    -- parser state:
+    in_device = false,
+    in_direction = false,
+    in_output = false,
+    in_vol = false,
+    in_mute = false,
+
+    feed_line = function(self, line)
+      msg.trace("pw-mon:", line)
+      line = ltrim(line)
+      if startswith(line, "changed:") or startswith(line, "added:") or startswith(line, "removed:") then
+        self.in_device = false
+        self.in_direction = false
+        self.in_output = false
+        self.in_vol = false
+        self.in_mute = false
+        self.in_properties = false
+      elseif startswith(line, "type: ") then
+        self.in_device = startswith(line, "type: PipeWire:Interface:Device")
+        msg.trace("parsed type:", line, self.in_device)
+      elseif startswith(line, "Prop: ") and self.in_device then
+        self.in_direction = startswith(line, "Prop: key Spa:Pod:Object:Param:Route:direction")
+        if self.in_direction then
+          self.in_output = false
+        end
+        -- which of the *Volumes params we read is unclear.
+        -- alternative to this is to just detect the change, and then cal wpctl get-volume @DEFAULT_AUDIO_SINK@
+        self.in_vol = startswith(line, "Prop: key Spa:Pod:Object:Param:Props:channelVolumes")
+        self.in_mute = startswith(line, "Prop: key Spa:Pod:Object:Param:Props:mute")
+        msg.trace("parsed `Prop:`", line, self.in_vol)
+      elseif line:find("Spa:Enum:Direction:Output", 1, true) and self.in_direction then
+        self.in_output = true
+      elseif startswith(line, "Float ") and self.in_device and self.in_output and self.in_vol then
+        value = tonumber(strip_prefix(line, "Float "))
+        self:feed_volume(value)
+      elseif startswith(line, "Bool ") and self.in_device and self.in_output and self.in_mute then
+        value = strip_prefix(line, "Bool ") == "true"
+        self:feed_mute(value)
+      elseif startswith(line, "properties:") and self.in_device then
+        self.in_properties = true
+      end
+    end,
+
+    feed_volume = function(self, vol)
+      msg.debug("volume:", vol)
+      self.volume = vol
+    end,
+    feed_mute = function(self, mute)
+      msg.debug("mute:", mute)
+      self.mute = mute
+    end,
+    -- get_effective_volume = function(self)
+    --   if self.mute then
+    --     return 0
+    --   else
+    --     return self.volume
+    --   end
+    -- end
+  }
+end
+
+function pwmon_new()
+  return {
+    -- non_blocking_popen handle for the pw-mon process
+    -- which can be periodically read and parsed to detect volume changes.
+    -- we have to use `sane-die-with-parent` otherwise `pw-mon` will still be active even after mpv exits.
+    handle = non_blocking_popen.non_blocking_popen("sane-die-with-parent --descendants pw-mon", RD_SIZE),
+    stdout_unparsed = "",
+    pwmon_parser = pwmon_parser_new(),
+    service = function(self)
+      -- do a single non-blocking read, and parse the result
+      -- in the *rare* case in which more than RD_SIZE data is ready, we service that remaining data on the next call
+      local buf, res = self.handle:read(RD_SIZE)
+      if res == "closed" then
+        msg.debug("pw-mon unexpectedly closed!")
+      end
+      if buf ~= nil then
+        local old_vol = self.pwmon_parser.volume
+        local old_mute = self.pwmon_parser.mute
+        self.stdout_unparsed = self.stdout_unparsed .. buf
+        self:consume_stdout()
+        local new_vol = self.pwmon_parser.volume
+        local new_mute = self.pwmon_parser.mute
+
+        if new_vol ~= old_vol then
+          msg.debug("pipewire volume change:", old_vol, new_vol)
+          mp.set_property_number("user-data/sane_sysvol/pw-mon-volume", new_vol)
+        end
+        if new_mute ~= old_mute then
+          msg.debug("pipewire mute change:", old_mute, new_mute)
+          mp.set_property_bool("user-data/sane_sysvol/pw-mon-mute", new_mute)
+        end
+      end
+    end,
+    consume_stdout = function(self)
+      local idx_newline, next_newline = 0, 0
+      while next_newline ~= nil do
+        next_newline = self.stdout_unparsed:find("\n", idx_newline + 1, true)
+        if next_newline ~= nil then
+          self.pwmon_parser:feed_line(self.stdout_unparsed:sub(idx_newline + 1, next_newline - 1))
+          idx_newline = next_newline
+        end
+      end
+      self.stdout_unparsed = self.stdout_unparsed:sub(idx_newline + 1)
+    end,
+  }
+end
+
+mp.set_property_number("user-data/sane_sysvol/volume", 0)
+mp.set_property_bool("user-data/sane_sysvol/mute", true)
+
+local sysvol = sysvol_new()
+local first_sysvol_announcement = true
+mp.observe_property("user-data/sane_sysvol/volume", "native", function(_, val)
+  -- we must set the volume property early -- before we actually know the volume
+  -- else other modules will think it's `nil` and error.
+  -- but we DON'T want the value we set to actually impact the system volume
+  if not first_sysvol_announcement then
+    sysvol:change_sysvol(val)
+  end
+  first_sysvol_announcement = false
+end)
+mp.observe_property("user-data/sane_sysvol/pw-mon-volume", "native", function(_, val)
+  sysvol:on_sysvol_change(val)
+end)
+
+local first_sysmute_announcement = true
+mp.observe_property("user-data/sane_sysvol/mute", "native", function(_, val)
+  -- we must set the mute property early -- before we actually know the mute
+  -- else other modules will think it's `nil` and error.
+  -- but we DON'T want the value we set to actually impact the system mute
+  if not first_sysmute_announcement then
+    sysvol:change_sysmute(val)
+  end
+  first_sysmute_announcement = false
+end)
+mp.observe_property("user-data/sane_sysvol/pw-mon-mute", "native", function(_, val)
+  sysvol:on_sysmute_change(val)
+end)
+
+local pwmon = pwmon_new()
+mp.register_event("tick", function() pwmon:service() end)
+
+msg.trace("load: complete")

hosts/common/programs/mpv/sane_sysvol/non_blocking_popen.lua

@@ -0,0 +1,91 @@
+-- source: <https://gist.github.com/max1220/c19ccd4d90ed32d41b879eba727cbcbd>
+-- requires: luajit
+--
+-- Implements a basic binding for popen that allows non-blocking reads
+-- returned "file" table only supports :read(with an optional size argument, no mode etc.) and :close
+ffi = require("ffi")
+-- C functions that we need
+ffi.cdef([[
+  void* popen(const char* cmd, const char* mode);
+  int pclose(void* stream);
+  int fileno(void* stream);
+  int fcntl(int fd, int cmd, int arg);
+  int *__errno_location ();
+  ssize_t read(int fd, void* buf, size_t count);
+]])
+
+-- you can compile a simple C programm to find these values(Or look in the headers)
+F_SETFL = 4
+O_NONBLOCK = 2048
+EAGAIN = 11
+
+-- this "array" holds the errno variable
+_errno = ffi.C.__errno_location()
+
+popen_meta = {
+  __index = {
+    -- close the process, prevent reading, allow garbage colletion
+    close = function(self)
+      if self._file ~= nil then
+        local _file = self._file
+        self._file = nil
+        self._fd = nil
+        self._read_buffer = nil
+        ffi.C.pclose(_file)
+      end
+    end,
+    -- read up to size bytes from the process. Returns data(string) and number of bytes read if successfull,
+    -- nil, "EAGAIN" if there is no data aviable, and
+    -- nil, "closed" if the process has ended
+    read = function(self, size)
+      if self._fd == nil then
+        return nil, "closed"
+      end
+
+      size = math.min(self._read_buffer_size, size)
+      local nbytes = ffi.C.read(self._fd, self._read_buffer, size)
+
+      if nbytes > 0 then
+        local data = ffi.string(self._read_buffer, nbytes)
+        return data, nbytes
+      elseif (nbytes == -1) and (_errno[0] == EAGAIN) then
+        return nil, "EAGAIN"
+      else
+        self:close()
+        return nil, "closed"
+      end
+    end
+  }
+  -- __gc = function(self) self:close() end
+  -- __close = function(self) p:close() end
+}
+
+local function non_blocking_popen(cmd, read_buffer_size)
+  -- the buffer for reading from the process
+  local read_buffer_size = tonumber(read_buffer_size) or 2048
+  local read_buffer = ffi.new('uint8_t[?]',read_buffer_size)
+
+  -- get a FILE* for our command
+  local file = assert(ffi.C.popen(cmd, "r"))
+
+  -- turn the FILE* to a fd (int) for fcntl
+  local fd = ffi.C.fileno(file)
+
+  -- set non-blocking mode for read
+  assert(ffi.C.fcntl(fd, F_SETFL, O_NONBLOCK)==0, "fcntl failed")
+
+  local p = {
+    _fd = fd,
+    _file = file,
+    _read_buffer = read_buffer,
+    _read_buffer_size = read_buffer_size,
+  }
+
+  setmetatable(p, popen_meta)
+
+  return p
+end
+
+return {
+  non_blocking_popen = non_blocking_popen
+}

hosts/common/programs/mpv/uosc.conf

@@ -24,7 +24,7 @@ font_scale=1.5
 font_bold=yes
 # refine=text_width: slightly better text rendering
 refine=text_width
-color=foreground=ff8080,background_text=ff8080
+color=foreground=ff968b,background_text=ff968b
 # N.B.: if `opacity=` is set non-empty, then ALL items must be specified (else they get 0 opacity).
 # opacity values *must* be a multiple of 0.1
 opacity=timeline=0.8,position=1,chapters=0.8,slider=0.8,slider_gauge=0.8,controls=0,speed=0.8,menu=1,submenu=0.4,border=1,title=0.8,tooltip=1,thumbnail=1,curtain=0.8,idle_indicator=0.8,audio_indicator=0.5,buffering_indicator=0.3,playlist_position=0.8