treewide: format all files

cli.nix

@@ -1,12 +1,13 @@
-{ pkgs ? import <nixpkgs> { }
-, lib ? pkgs.lib
-, mode ? "mount"
-, flake ? null
-, flakeAttr ? null
-, diskoFile ? null
-, rootMountPoint ? "/mnt"
-, noDeps ? false
-, ...
+{
+  pkgs ? import <nixpkgs> { },
+  lib ? pkgs.lib,
+  mode ? "mount",
+  flake ? null,
+  flakeAttr ? null,
+  diskoFile ? null,
+  rootMountPoint ? "/mnt",
+  noDeps ? false,
+  ...
 }@args:
 let
   disko = import ./. {
@@ -17,66 +18,77 @@ let
   hasDiskoFile = diskoFile != null;
 
   diskoAttr =
-    (if noDeps then
-      (if hasDiskoFile then
-        {
-          destroy = "_cliDestroyNoDeps";
-          format = "_cliFormatNoDeps";
-          mount = "_cliMountNoDeps";
-          unmount = "_cliUnmountNoDeps";
+    (
+      if noDeps then
+        (
+          if hasDiskoFile then
+            {
+              destroy = "_cliDestroyNoDeps";
+              format = "_cliFormatNoDeps";
+              mount = "_cliMountNoDeps";
+              unmount = "_cliUnmountNoDeps";
 
-          "format,mount" = "_cliFormatMountNoDeps";
-          "destroy,format,mount" = "_cliDestroyFormatMountNoDeps";
+              "format,mount" = "_cliFormatMountNoDeps";
+              "destroy,format,mount" = "_cliDestroyFormatMountNoDeps";
+            }
+          else
+            {
+              destroy = "destroyNoDeps";
+              format = "formatNoDeps";
+              mount = "mountNoDeps";
+              unmount = "unmountNoDeps";
+
+              "format,mount" = "formatMountNoDeps";
+              "destroy,format,mount" = "destroyFormatMountNoDeps";
+            }
+        )
+        // {
+          # legacy aliases
+          disko = "diskoScriptNoDeps";
+          create = "createScriptNoDeps";
+          zap_create_mount = "diskoScriptNoDeps";
         }
       else
-        {
-          destroy = "destroyNoDeps";
-          format = "formatNoDeps";
-          mount = "mountNoDeps";
-          unmount = "unmountNoDeps";
+        (
+          if hasDiskoFile then
+            {
+              destroy = "_cliDestroy";
+              format = "_cliFormat";
+              mount = "_cliMount";
+              unmount = "_cliUnmount";
 
-          "format,mount" = "formatMountNoDeps";
-          "destroy,format,mount" = "destroyFormatMountNoDeps";
-        }) // {
-        # legacy aliases
-        disko = "diskoScriptNoDeps";
-        create = "createScriptNoDeps";
-        zap_create_mount = "diskoScriptNoDeps";
-      }
-    else
-      (if hasDiskoFile then
-        {
-          destroy = "_cliDestroy";
-          format = "_cliFormat";
-          mount = "_cliMount";
-          unmount = "_cliUnmount";
+              "format,mount" = "_cliFormatMount";
+              "destroy,format,mount" = "_cliDestroyFormatMount";
+            }
+          else
+            {
+              destroy = "destroy";
+              format = "format";
+              mount = "mount";
+              unmount = "unmount";
 
-          "format,mount" = "_cliFormatMount";
-          "destroy,format,mount" = "_cliDestroyFormatMount";
+              "format,mount" = "formatMount";
+              "destroy,format,mount" = "destroyFormatMount";
+            }
+        )
+        // {
+          # legacy aliases
+          disko = "diskoScript";
+          create = "createScript";
+          zap_create_mount = "diskoScript";
         }
-      else
-        {
-          destroy = "destroy";
-          format = "format";
-          mount = "mount";
-          unmount = "unmount";
-
-          "format,mount" = "formatMount";
-          "destroy,format,mount" = "destroyFormatMount";
-        }) // {
-        # legacy aliases
-        disko = "diskoScript";
-        create = "createScript";
-        zap_create_mount = "diskoScript";
-      }
     ).${mode};
 
   hasDiskoConfigFlake =
     hasDiskoFile || lib.hasAttrByPath [ "diskoConfigurations" flakeAttr ] (builtins.getFlake flake);
 
-  hasDiskoModuleFlake =
-    lib.hasAttrByPath [ "nixosConfigurations" flakeAttr "config" "disko" "devices" ] (builtins.getFlake flake);
-
+  hasDiskoModuleFlake = lib.hasAttrByPath [
+    "nixosConfigurations"
+    flakeAttr
+    "config"
+    "disko"
+    "devices"
+  ] (builtins.getFlake flake);
 
   diskFormat =
     let
@@ -86,20 +98,16 @@ let
         else
           (builtins.getFlake flake).diskoConfigurations.${flakeAttr};
     in
-    if builtins.isFunction diskoConfig then
-      diskoConfig ({ inherit lib; } // args)
-    else
-      diskoConfig;
+    if builtins.isFunction diskoConfig then diskoConfig ({ inherit lib; } // args) else diskoConfig;
 
-  diskoEval =
-    disko.${diskoAttr} diskFormat pkgs;
+  diskoEval = disko.${diskoAttr} diskFormat pkgs;
 
   diskoScript =
     if hasDiskoConfigFlake then
       diskoEval
     else if hasDiskoModuleFlake then
-      (builtins.getFlake flake).nixosConfigurations.${flakeAttr}.config.system.build.${diskoAttr} or (
-        pkgs.writeShellScriptBin "disko-compat-error" ''
+      (builtins.getFlake flake).nixosConfigurations.${flakeAttr}.config.system.build.${diskoAttr}
+        or (pkgs.writeShellScriptBin "disko-compat-error" ''
           echo 'Error: Attribute `nixosConfigurations.${flakeAttr}.config.system.build.${diskoAttr}` >&2
           echo '       not found in flake `${flake}`!' >&2
           echo '       This is probably caused by the locked version of disko in the flake' >&2
@@ -107,8 +115,7 @@ let
           echo 'EITHER set the `disko` input of your flake to `github:nix-community/disko/latest`,' >&2
           echo '       run `nix flake update disko` in the flake directory and then try again,' >&2
           echo 'OR run `nix run github:nix-community/disko/v1.9.0 -- --help` and use one of its modes.' >&2
-          exit 1;''
-      )
+          exit 1;'')
     else
       (builtins.abort "couldn't find `diskoConfigurations.${flakeAttr}` or `nixosConfigurations.${flakeAttr}.config.disko.devices`");
 

default.nix

@@ -1,64 +1,107 @@
-{ lib ? import <nixpkgs/lib>
-, rootMountPoint ? "/mnt"
-, checked ? false
-, diskoLib ? import ./lib { inherit lib rootMountPoint; }
+{
+  lib ? import <nixpkgs/lib>,
+  rootMountPoint ? "/mnt",
+  checked ? false,
+  diskoLib ? import ./lib { inherit lib rootMountPoint; },
 }:
 let
-  eval = cfg: lib.evalModules {
-    modules = lib.singleton {
-      # _file = toString input;
-      imports = lib.singleton { disko.devices = cfg.disko.devices; };
-      options = {
-        disko.devices = lib.mkOption {
-          type = diskoLib.toplevel;
+  eval =
+    cfg:
+    lib.evalModules {
+      modules = lib.singleton {
+        # _file = toString input;
+        imports = lib.singleton { disko.devices = cfg.disko.devices; };
+        options = {
+          disko.devices = lib.mkOption {
+            type = diskoLib.toplevel;
+          };
         };
       };
     };
-  };
   # We might instead reuse some of the deprecated output names to refer to the values the _cli* outputs currently do,
   # but this warning allows us to get feedback from users early in case they have a use case we haven't considered.
-  warnDeprecated = name: lib.warn "the ${name} output is deprecated and will be removed, please open an issue if you're using it!";
+  warnDeprecated =
+    name:
+    lib.warn "the ${name} output is deprecated and will be removed, please open an issue if you're using it!";
 in
 {
   lib = warnDeprecated ".lib.lib" diskoLib;
 
-  _cliDestroy = cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).destroy;
-  _cliDestroyNoDeps = cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).destroyNoDeps;
+  _cliDestroy =
+    cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).destroy;
+  _cliDestroyNoDeps =
+    cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).destroyNoDeps;
 
   _cliFormat = cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).format;
-  _cliFormatNoDeps = cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).formatNoDeps;
+  _cliFormatNoDeps =
+    cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).formatNoDeps;
 
   _cliMount = cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).mount;
-  _cliMountNoDeps = cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).mountNoDeps;
+  _cliMountNoDeps =
+    cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).mountNoDeps;
 
-  _cliUnmount = cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).unmount;
-  _cliUnmountNoDeps = cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).unmountNoDeps;
+  _cliUnmount =
+    cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).unmount;
+  _cliUnmountNoDeps =
+    cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).unmountNoDeps;
 
-  _cliFormatMount = cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).formatMount;
-  _cliFormatMountNoDeps = cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).formatMountNoDeps;
+  _cliFormatMount =
+    cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).formatMount;
+  _cliFormatMountNoDeps =
+    cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).formatMountNoDeps;
 
-  _cliDestroyFormatMount = cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).destroyFormatMount;
-  _cliDestroyFormatMountNoDeps = cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).destroyFormatMountNoDeps;
+  _cliDestroyFormatMount =
+    cfg: pkgs: ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).destroyFormatMount;
+  _cliDestroyFormatMountNoDeps =
+    cfg: pkgs:
+    ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).destroyFormatMountNoDeps;
 
   # legacy aliases
   create = cfg: warnDeprecated "create" (eval cfg).config.disko.devices._create;
-  createScript = cfg: pkgs: warnDeprecated "createScript" ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).formatScript;
-  createScriptNoDeps = cfg: pkgs: warnDeprecated "createScriptNoDeps" ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).formatScriptNoDeps;
+  createScript =
+    cfg: pkgs:
+    warnDeprecated "createScript"
+      ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).formatScript;
+  createScriptNoDeps =
+    cfg: pkgs:
+    warnDeprecated "createScriptNoDeps"
+      ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).formatScriptNoDeps;
 
   format = cfg: warnDeprecated "format" (eval cfg).config.disko.devices._create;
-  formatScript = cfg: pkgs: warnDeprecated "formatScript" ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).formatScript;
-  formatScriptNoDeps = cfg: pkgs: warnDeprecated "formatScriptNoDeps" ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).formatScriptNoDeps;
+  formatScript =
+    cfg: pkgs:
+    warnDeprecated "formatScript"
+      ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).formatScript;
+  formatScriptNoDeps =
+    cfg: pkgs:
+    warnDeprecated "formatScriptNoDeps"
+      ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).formatScriptNoDeps;
 
   mount = cfg: warnDeprecated "mount" (eval cfg).config.disko.devices._mount;
-  mountScript = cfg: pkgs: warnDeprecated "mountScript" ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).mountScript;
-  mountScriptNoDeps = cfg: pkgs: warnDeprecated "mountScriptNoDeps" ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).mountScriptNoDeps;
+  mountScript =
+    cfg: pkgs:
+    warnDeprecated "mountScript"
+      ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).mountScript;
+  mountScriptNoDeps =
+    cfg: pkgs:
+    warnDeprecated "mountScriptNoDeps"
+      ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).mountScriptNoDeps;
 
   disko = cfg: warnDeprecated "disko" (eval cfg).config.disko.devices._disko;
-  diskoScript = cfg: pkgs: warnDeprecated "diskoScript" ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).diskoScript;
-  diskoScriptNoDeps = cfg: pkgs: warnDeprecated "diskoScriptNoDeps" ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).diskoScriptNoDeps;
+  diskoScript =
+    cfg: pkgs:
+    warnDeprecated "diskoScript"
+      ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).diskoScript;
+  diskoScriptNoDeps =
+    cfg: pkgs:
+    warnDeprecated "diskoScriptNoDeps"
+      ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).diskoScriptNoDeps;
 
   # we keep this old output for backwards compatibility
-  diskoNoDeps = cfg: pkgs: warnDeprecated "diskoNoDeps" ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).diskoScriptNoDeps;
+  diskoNoDeps =
+    cfg: pkgs:
+    warnDeprecated "diskoNoDeps"
+      ((eval cfg).config.disko.devices._scripts { inherit pkgs checked; }).diskoScriptNoDeps;
 
   config = cfg: (eval cfg).config.disko.devices._config;
   packages = cfg: (eval cfg).config.disko.devices._packages;

doc.nix

@@ -1,4 +1,10 @@
-{ lib, nixosOptionsDoc, runCommand, fetchurl, pandoc }:
+{
+  lib,
+  nixosOptionsDoc,
+  runCommand,
+  fetchurl,
+  pandoc,
+}:
 
 let
   diskoLib = import ./lib {
@@ -21,16 +27,18 @@ let
   options = nixosOptionsDoc {
     options = eval.options;
   };
-  md = (runCommand "disko-options.md" { } ''
-    cat >$out <<EOF
-    # Disko options
+  md =
+    (runCommand "disko-options.md" { } ''
+      cat >$out <<EOF
+      # Disko options
 
-    EOF
-    cat ${options.optionsCommonMark} >>$out
-  '').overrideAttrs (_o: {
-    # Work around https://github.com/hercules-ci/hercules-ci-agent/issues/168
-    allowSubstitutes = true;
-  });
+      EOF
+      cat ${options.optionsCommonMark} >>$out
+    '').overrideAttrs
+      (_o: {
+        # Work around https://github.com/hercules-ci/hercules-ci-agent/issues/168
+        allowSubstitutes = true;
+      });
   css = fetchurl {
     url = "https://gist.githubusercontent.com/killercup/5917178/raw/40840de5352083adb2693dc742e9f75dbb18650f/pandoc.css";
     sha256 = "sha256-SzSvxBIrylxBF6B/mOImLlZ+GvCfpWNLzGFViLyOeTk=";

example/btrfs-only-root-subvolume.nix

@@ -26,7 +26,10 @@
                 type = "btrfs";
                 extraArgs = [ "-f" ]; # Override existing partition
                 mountpoint = "/";
-                mountOptions = [ "compress=zstd" "noatime" ];
+                mountOptions = [
+                  "compress=zstd"
+                  "noatime"
+                ];
               };
             };
           };
@@ -35,4 +38,3 @@
     };
   };
 }
-

example/btrfs-subvolumes.nix

@@ -41,7 +41,10 @@
                   "/home/user" = { };
                   # Parent is not mounted so the mountpoint must be set
                   "/nix" = {
-                    mountOptions = [ "compress=zstd" "noatime" ];
+                    mountOptions = [
+                      "compress=zstd"
+                      "noatime"
+                    ];
                     mountpoint = "/nix";
                   };
                   # This subvolume will be created but not mounted
@@ -74,4 +77,3 @@
     };
   };
 }
-

example/legacy-table.nix

@@ -38,4 +38,3 @@
     };
   };
 }
-

example/luks-btrfs-subvolumes.nix

@@ -35,15 +35,24 @@
                   subvolumes = {
                     "/root" = {
                       mountpoint = "/";
-                      mountOptions = [ "compress=zstd" "noatime" ];
+                      mountOptions = [
+                        "compress=zstd"
+                        "noatime"
+                      ];
                     };
                     "/home" = {
                       mountpoint = "/home";
-                      mountOptions = [ "compress=zstd" "noatime" ];
+                      mountOptions = [
+                        "compress=zstd"
+                        "noatime"
+                      ];
                     };
                     "/nix" = {
                       mountpoint = "/nix";
-                      mountOptions = [ "compress=zstd" "noatime" ];
+                      mountOptions = [
+                        "compress=zstd"
+                        "noatime"
+                      ];
                     };
                     "/swap" = {
                       mountpoint = "/.swapvol";

example/luks-on-mdadm.nix

@@ -56,4 +56,3 @@
     };
   };
 }
-

example/stand-alone/configuration.nix

@@ -1,6 +1,7 @@
-{ pkgs
-, lib
-, ...
+{
+  pkgs,
+  lib,
+  ...
 }:
 let
   # We just import from the repository for testing here:

example/with-lib.nix

@@ -1,5 +1,10 @@
 # Example to create a bios compatible gpt partition
-{ disks ? [ "/dev/vdb" ], lib, ... }: {
+{
+  disks ? [ "/dev/vdb" ],
+  lib,
+  ...
+}:
+{
   disko.devices = {
     disk = lib.genAttrs disks (device: {
       name = lib.replaceStrings [ "/" ] [ "_" ] device;

example/xfs-with-quota.nix

@@ -23,7 +23,10 @@
                 type = "filesystem";
                 format = "xfs";
                 mountpoint = "/";
-                mountOptions = [ "defaults" "pquota" ];
+                mountOptions = [
+                  "defaults"
+                  "pquota"
+                ];
               };
             };
           };

example/zfs-with-vdevs.nix

@@ -251,14 +251,20 @@
               }
               {
                 mode = "mirror";
-                members = [ "data2" "data3" ];
+                members = [
+                  "data2"
+                  "data3"
+                ];
               }
             ];
             spare = [ "spare" ];
             log = [
               {
                 mode = "mirror";
-                members = [ "log1" "log2" ];
+                members = [
+                  "log1"
+                  "log2"
+                ];
               }
               {
                 members = [ "log3" ];
@@ -267,7 +273,10 @@
             dedup = [
               {
                 mode = "mirror";
-                members = [ "dedup1" "dedup2" ];
+                members = [
+                  "dedup1"
+                  "dedup2"
+                ];
               }
               {
                 members = [ "dedup3" ];
@@ -276,7 +285,10 @@
             special = [
               {
                 mode = "mirror";
-                members = [ "special1" "special2" ];
+                members = [
+                  "special1"
+                  "special2"
+                ];
               }
               {
                 members = [ "special3" ];

flake.nix

@@ -6,7 +6,8 @@
   #inputs.nixpkgs.url = "nixpkgs";
   inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
 
-  outputs = { self, nixpkgs, ... }:
+  outputs =
+    { self, nixpkgs, ... }:
     let
       lib = nixpkgs.lib;
       supportedSystems = [
@@ -28,7 +29,8 @@
       nixosModules.default = self.nixosModules.disko; # convention
       nixosModules.disko = ./module.nix;
       lib = diskoLib;
-      packages = forAllSystems (system:
+      packages = forAllSystems (
+        system:
         let
           pkgs = nixpkgs.legacyPackages.${system};
         in
@@ -41,27 +43,35 @@
           default = self.packages.${system}.disko;
 
           create-release = pkgs.callPackage ./scripts/create-release.nix { };
-        } // pkgs.lib.optionalAttrs (!pkgs.stdenv.buildPlatform.isRiscV64) {
+        }
+        // pkgs.lib.optionalAttrs (!pkgs.stdenv.buildPlatform.isRiscV64) {
           disko-doc = pkgs.callPackage ./doc.nix { };
-        });
+        }
+      );
       # TODO: disable bios-related tests on aarch64...
       # Run checks: nix flake check -L
-      checks = forAllSystems (system:
+      checks = forAllSystems (
+        system:
         let
           pkgs = nixpkgs.legacyPackages.${system};
           # FIXME: aarch64-linux seems to hang on boot
-          nixosTests = lib.optionalAttrs pkgs.stdenv.hostPlatform.isx86_64 (import ./tests {
-            inherit pkgs;
-            makeTest = import (pkgs.path + "/nixos/tests/make-test-python.nix");
-            eval-config = import (pkgs.path + "/nixos/lib/eval-config.nix");
-          });
+          nixosTests = lib.optionalAttrs pkgs.stdenv.hostPlatform.isx86_64 (
+            import ./tests {
+              inherit pkgs;
+              makeTest = import (pkgs.path + "/nixos/tests/make-test-python.nix");
+              eval-config = import (pkgs.path + "/nixos/lib/eval-config.nix");
+            }
+          );
 
           disko-install = pkgs.callPackage ./tests/disko-install {
             inherit self;
             diskoVersion = version;
           };
 
-          jsonTypes = pkgs.writeTextFile { name = "jsonTypes"; text = (builtins.toJSON diskoLib.jsonTypes); };
+          jsonTypes = pkgs.writeTextFile {
+            name = "jsonTypes";
+            text = (builtins.toJSON diskoLib.jsonTypes);
+          };
 
           treefmt = pkgs.runCommand "treefmt" { } ''
             ${self.formatter.${system}}/bin/treefmt --ci --working-dir ${self}
@@ -69,11 +79,14 @@
           '';
         in
         # FIXME: aarch64-linux seems to hang on boot
-        lib.optionalAttrs pkgs.stdenv.hostPlatform.isx86_64 (nixosTests // { inherit disko-install; }) //
-        pkgs.lib.optionalAttrs (!pkgs.stdenv.buildPlatform.isRiscV64 && !pkgs.stdenv.hostPlatform.isx86_32) {
-          inherit jsonTypes treefmt;
-          inherit (self.packages.${system}) disko-doc;
-        });
+        lib.optionalAttrs pkgs.stdenv.hostPlatform.isx86_64 (nixosTests // { inherit disko-install; })
+        //
+          pkgs.lib.optionalAttrs (!pkgs.stdenv.buildPlatform.isRiscV64 && !pkgs.stdenv.hostPlatform.isx86_32)
+            {
+              inherit jsonTypes treefmt;
+              inherit (self.packages.${system}) disko-doc;
+            }
+      );
 
       nixosConfigurations.testmachine = lib.nixosSystem {
         system = "x86_64-linux";
@@ -83,7 +96,8 @@
           ./module.nix
         ];
       };
-      formatter = forAllSystems (system:
+      formatter = forAllSystems (
+        system:
         let
           pkgs = nixpkgs.legacyPackages.${system};
         in
@@ -104,6 +118,6 @@
             self.formatter.${system}
           ];
         };
-     });
+      });
     };
 }

install-cli.nix

@@ -1,10 +1,10 @@
-{ flake
-, flakeAttr
-, diskMappings
-, extraSystemConfig ? "{}"
-, writeEfiBootEntries ? false
-, rootMountPoint ? "/mnt"
-,
+{
+  flake,
+  flakeAttr,
+  diskMappings,
+  extraSystemConfig ? "{}",
+  writeEfiBootEntries ? false,
+  rootMountPoint ? "/mnt",
 }:
 let
   originalSystem = (builtins.getFlake "${flake}").nixosConfigurations."${flakeAttr}";
@@ -17,21 +17,19 @@ let
     else
       throw "No device passed for disk '${name}'. Pass `--disk ${name} /dev/name` via commandline";
 
-  modifiedDisks = builtins.mapAttrs
-    (
-      name: value:
-        let
-          dev = deviceName name;
-        in
-        value
-        // {
-          device = dev;
-          content = value.content // {
-            device = dev;
-          };
-        }
-    )
-    originalSystem.config.disko.devices.disk;
+  modifiedDisks = builtins.mapAttrs (
+    name: value:
+    let
+      dev = deviceName name;
+    in
+    value
+    // {
+      device = dev;
+      content = value.content // {
+        device = dev;
+      };
+    }
+  ) originalSystem.config.disko.devices.disk;
 
   # filter all nixos module internal attributes
   cleanedDisks = lib.filterAttrsRecursive (n: _: !lib.hasPrefix "_" n) modifiedDisks;

lib/binfmt.nix

@@ -1,25 +1,33 @@
-{ lib, diskoLib, pkgs, imagePkgs, ... }:
+{
+  lib,
+  diskoLib,
+  pkgs,
+  imagePkgs,
+  ...
+}:
 
 let
   # from https://github.com/NixOS/nixpkgs/blob/851f7fc119e9597c26cc43e10938ce7272d0af9d/nixos/modules/system/boot/binfmt.nix
   makeBinfmtLine =
-    { name
-    , recognitionType
-    , offset
-    , magicOrExtension
-    , mask
-    , preserveArgvZero
-    , openBinary
-    , matchCredentials
-    , fixBinary
-    , interpreter
-    , ...
+    {
+      name,
+      recognitionType,
+      offset,
+      magicOrExtension,
+      mask,
+      preserveArgvZero,
+      openBinary,
+      matchCredentials,
+      fixBinary,
+      interpreter,
+      ...
     }:
     let
       type = if recognitionType == "magic" then "M" else "E";
       offset' = toString offset;
       mask' = toString mask;
-      flags = with lib;
+      flags =
+        with lib;
         if !(matchCredentials -> openBinary) then
           throw "boot.binfmt.registrations.${name}: you can't specify openBinary = false when matchCredentials = true."
         else
@@ -144,29 +152,30 @@ let
 in
 {
   binfmtRegistration =
-  let
-    system = imagePkgs.stdenv.hostPlatform.system;
-    enabled = system != pkgs.stdenv.hostPlatform.system;
-    elaborated = lib.systems.elaborate { inherit system; };
-    useStaticEmulator = true; # needed for chroot
-    interpreter = elaborated.emulator (if useStaticEmulator then pkgs.pkgsStatic else pkgs);
+    let
+      system = imagePkgs.stdenv.hostPlatform.system;
+      enabled = system != pkgs.stdenv.hostPlatform.system;
+      elaborated = lib.systems.elaborate { inherit system; };
+      useStaticEmulator = true; # needed for chroot
+      interpreter = elaborated.emulator (if useStaticEmulator then pkgs.pkgsStatic else pkgs);
 
-    inherit (elaborated) qemuArch;
-    isQemu = "qemu-${qemuArch}" == baseNameOf interpreter;
-  in makeBinfmtLine (
-    {
-      name = system;
-      inherit interpreter;
-      recognitionType = "magic";
-      offset = null;
-      openBinary = false;
-      matchCredentials = false;
+      inherit (elaborated) qemuArch;
+      isQemu = "qemu-${qemuArch}" == baseNameOf interpreter;
+    in
+    makeBinfmtLine (
+      {
+        name = system;
+        inherit interpreter;
+        recognitionType = "magic";
+        offset = null;
+        openBinary = false;
+        matchCredentials = false;
 
-      preserveArgvZero = isQemu;
+        preserveArgvZero = isQemu;
 
-      fixBinary = useStaticEmulator;
-    }
-    // (magics.${system} or (throw "Cannot create binfmt registration for system ${system}"))
-  );
+        fixBinary = useStaticEmulator;
+      }
+      // (magics.${system} or (throw "Cannot create binfmt registration for system ${system}"))
+    );
   systemsAreDifferent = imagePkgs.stdenv.hostPlatform.system != pkgs.stdenv.hostPlatform.system;
 }

lib/interactive-vm.nix

@@ -1,22 +1,30 @@
-{ diskoLib, modulesPath, config, pkgs, lib, ... }:
+{
+  diskoLib,
+  modulesPath,
+  config,
+  pkgs,
+  lib,
+  ...
+}:
 
 let
   vm_disko = (diskoLib.testLib.prepareDiskoConfig config diskoLib.testLib.devices).disko;
-  cfg_ = (lib.evalModules {
-    modules = lib.singleton {
-      # _file = toString input;
-      imports = lib.singleton { disko.devices = vm_disko.devices; };
-      options = {
-        disko.devices = lib.mkOption {
-          type = diskoLib.toplevel;
-        };
-        disko.testMode = lib.mkOption {
-          type = lib.types.bool;
-          default = true;
+  cfg_ =
+    (lib.evalModules {
+      modules = lib.singleton {
+        # _file = toString input;
+        imports = lib.singleton { disko.devices = vm_disko.devices; };
+        options = {
+          disko.devices = lib.mkOption {
+            type = diskoLib.toplevel;
+          };
+          disko.testMode = lib.mkOption {
+            type = lib.types.bool;
+            default = true;
+          };
         };
       };
-    };
-  }).config;
+    }).config;
   disks = lib.attrValues cfg_.disko.devices.disk;
   rootDisk = {
     name = "root";
@@ -26,13 +34,11 @@ let
     deviceExtraOpts.bootindex = "1";
     deviceExtraOpts.serial = "root";
   };
-  otherDisks = map
-    (disk: {
-      name = disk.name;
-      file = ''"$tmp"/${lib.escapeShellArg disk.name}.qcow2'';
-      driveExtraOpts.werror = "report";
-    })
-    (builtins.tail disks);
+  otherDisks = map (disk: {
+    name = disk.name;
+    file = ''"$tmp"/${lib.escapeShellArg disk.name}.qcow2'';
+    driveExtraOpts.werror = "report";
+  }) (builtins.tail disks);
 
   diskoBasedConfiguration = {
     # generated from disko config

lib/make-disk-image.nix

@@ -1,10 +1,11 @@
-{ config
-, diskoLib
-, lib
-, extendModules
-, options
-, imagePkgs
-, ...
+{
+  config,
+  diskoLib,
+  lib,
+  extendModules,
+  options,
+  imagePkgs,
+  ...
 }:
 let
   diskoCfg = config.disko;
@@ -13,33 +14,45 @@ let
   checked = diskoCfg.checkScripts;
 
   configSupportsZfs = config.boot.supportedFilesystems.zfs or false;
-  binfmt = diskoLib.binfmt { inherit diskoLib lib pkgs imagePkgs; };
+  binfmt = diskoLib.binfmt {
+    inherit
+      diskoLib
+      lib
+      pkgs
+      imagePkgs
+      ;
+  };
   binfmtSetup = lib.optionalString (cfg.enableBinfmt && binfmt.systemsAreDifferent) ''
     mount binfmt_misc -t binfmt_misc /proc/sys/fs/binfmt_misc
     ${pkgs.systemdMinimal}/lib/systemd/systemd-binfmt <(echo ${lib.strings.escapeShellArg binfmt.binfmtRegistration})
   '';
 
-  vmTools = pkgs.vmTools.override
-    ({
-      rootModules = [
-        "9p" "9pnet_virtio" # we can drop those in future if we stop supporting 24.11
+  vmTools = pkgs.vmTools.override (
+    {
+      rootModules =
+        [
+          "9p"
+          "9pnet_virtio" # we can drop those in future if we stop supporting 24.11
 
-        "virtiofs"
-        "virtio_pci"
-        "virtio_blk"
-        "virtio_balloon"
-        "virtio_rng"
-      ]
+          "virtiofs"
+          "virtio_pci"
+          "virtio_blk"
+          "virtio_balloon"
+          "virtio_rng"
+        ]
         ++ (lib.optional configSupportsZfs "zfs")
         ++ cfg.extraRootModules;
-      kernel = pkgs.aggregateModules
-        ([ cfg.kernelPackages.kernel ]
-          ++ lib.optional (lib.elem "zfs" cfg.extraRootModules || configSupportsZfs) cfg.kernelPackages.${config.boot.zfs.package.kernelModuleAttribute});
+      kernel = pkgs.aggregateModules (
+        [ cfg.kernelPackages.kernel ]
+        ++ lib.optional (
+          lib.elem "zfs" cfg.extraRootModules || configSupportsZfs
+        ) cfg.kernelPackages.${config.boot.zfs.package.kernelModuleAttribute}
+      );
     }
-  // lib.optionalAttrs (diskoLib.vmToolsSupportsCustomQemu lib)
-    {
+    // lib.optionalAttrs (diskoLib.vmToolsSupportsCustomQemu lib) {
       customQemu = cfg.qemu;
-    });
+    }
+  );
   cleanedConfig = diskoLib.testLib.prepareDiskoConfig config diskoLib.testLib.devices;
   systemToInstall = extendModules {
     modules = [
@@ -51,34 +64,41 @@ let
       }
     ];
   };
-  systemToInstallNative = if binfmt.systemsAreDifferent then extendModules {
-    modules = [
-      cfg.extraConfig
-      {
-        disko.testMode = true;
-        disko.devices = lib.mkForce cleanedConfig.disko.devices;
-        boot.loader.grub.devices = lib.mkForce cleanedConfig.boot.loader.grub.devices;
-        nixpkgs.hostPlatform = lib.mkForce pkgs.stdenv.hostPlatform;
+  systemToInstallNative =
+    if binfmt.systemsAreDifferent then
+      extendModules {
+        modules = [
+          cfg.extraConfig
+          {
+            disko.testMode = true;
+            disko.devices = lib.mkForce cleanedConfig.disko.devices;
+            boot.loader.grub.devices = lib.mkForce cleanedConfig.boot.loader.grub.devices;
+            nixpkgs.hostPlatform = lib.mkForce pkgs.stdenv.hostPlatform;
+          }
+        ];
       }
-    ];
-  }
-  else systemToInstall;
-  dependencies = with pkgs; [
-    bash
-    coreutils
-    gnused
-    parted # for partprobe
-    systemdMinimal
-    nix
-    util-linux
-    findutils
-    kmod
-  ] ++ cfg.extraDependencies;
+    else
+      systemToInstall;
+  dependencies =
+    with pkgs;
+    [
+      bash
+      coreutils
+      gnused
+      parted # for partprobe
+      systemdMinimal
+      nix
+      util-linux
+      findutils
+      kmod
+    ]
+    ++ cfg.extraDependencies;
   preVM = ''
     # shellcheck disable=SC2154
     mkdir -p "$out"
-    ${lib.concatMapStringsSep "\n" (disk:
-       # shellcheck disable=SC2154
+    ${lib.concatMapStringsSep "\n" (
+      disk:
+      # shellcheck disable=SC2154
       "${pkgs.qemu}/bin/qemu-img create -f ${imageFormat} \"$out/${disk.imageName}.${imageFormat}\" ${disk.imageSize}"
     ) (lib.attrValues diskoCfg.devices.disk)}
     # This makes disko work, when canTouchEfiVariables is set to true.
@@ -127,24 +147,26 @@ let
     umount -Rv ${systemToInstall.config.disko.rootMountPoint}
   '';
 
-  QEMU_OPTS = lib.concatStringsSep " " ([
-    "-drive if=pflash,format=raw,unit=0,readonly=on,file=${pkgs.OVMF.firmware}"
-    "-drive if=pflash,format=raw,unit=1,file=efivars.fd"
-  ] ++ builtins.map
-    (disk:
+  QEMU_OPTS = lib.concatStringsSep " " (
+    [
+      "-drive if=pflash,format=raw,unit=0,readonly=on,file=${pkgs.OVMF.firmware}"
+      "-drive if=pflash,format=raw,unit=1,file=efivars.fd"
+    ]
+    ++ builtins.map (
+      disk:
       "-drive file=\"$out\"/${disk.imageName}.${imageFormat},if=virtio,cache=unsafe,werror=report,format=${imageFormat}"
-    )
-    (lib.attrValues diskoCfg.devices.disk));
+    ) (lib.attrValues diskoCfg.devices.disk)
+  );
 in
 {
-  system.build.diskoImages = vmTools.runInLinuxVM (pkgs.runCommand cfg.name
-    {
+  system.build.diskoImages = vmTools.runInLinuxVM (
+    pkgs.runCommand cfg.name {
       buildInputs = dependencies;
       inherit preVM QEMU_OPTS;
       postVM = cfg.extraPostVM;
       inherit (diskoCfg) memSize;
-    }
-    (binfmtSetup + partitioner + installer));
+    } (binfmtSetup + partitioner + installer)
+  );
 
   system.build.diskoImagesScript = diskoLib.writeCheckedBash { inherit checked pkgs; } cfg.name ''
     set -efu
@@ -209,32 +231,34 @@ in
       shift
     done
 
-    export preVM=${diskoLib.writeCheckedBash { inherit pkgs checked; } "preVM.sh" ''
-      set -efu
-      mv copy_before_disko copy_after_disko xchg/
-      origBuilder=${pkgs.writeScript "disko-builder" ''
-        set -eu
-        export PATH=${lib.makeBinPath dependencies}
-        for src in /tmp/xchg/copy_before_disko/*; do
-          [ -e "$src" ] || continue
-          dst=$(basename "$src" | base64 -d)
-          mkdir -p "$(dirname "$dst")"
-          cp -r "$src" "$dst"
-        done
-        set -f
-        ${partitioner}
-        set +f
-        for src in /tmp/xchg/copy_after_disko/*; do
-          [ -e "$src" ] || continue
-          dst=/mnt/$(basename "$src" | base64 -d)
-          mkdir -p "$(dirname "$dst")"
-          cp -r "$src" "$dst"
-        done
-        ${installer}
-      ''}
-      echo "export origBuilder=$origBuilder" >> xchg/saved-env
-      ${preVM}
-    ''}
+    export preVM=${
+      diskoLib.writeCheckedBash { inherit pkgs checked; } "preVM.sh" ''
+        set -efu
+        mv copy_before_disko copy_after_disko xchg/
+        origBuilder=${pkgs.writeScript "disko-builder" ''
+          set -eu
+          export PATH=${lib.makeBinPath dependencies}
+          for src in /tmp/xchg/copy_before_disko/*; do
+            [ -e "$src" ] || continue
+            dst=$(basename "$src" | base64 -d)
+            mkdir -p "$(dirname "$dst")"
+            cp -r "$src" "$dst"
+          done
+          set -f
+          ${partitioner}
+          set +f
+          for src in /tmp/xchg/copy_after_disko/*; do
+            [ -e "$src" ] || continue
+            dst=/mnt/$(basename "$src" | base64 -d)
+            mkdir -p "$(dirname "$dst")"
+            cp -r "$src" "$dst"
+          done
+          ${installer}
+        ''}
+        echo "export origBuilder=$origBuilder" >> xchg/saved-env
+        ${preVM}
+      ''
+    }
     export postVM=${diskoLib.writeCheckedBash { inherit pkgs checked; } "postVM.sh" cfg.extraPostVM}
 
     build_memory=''${build_memory:-${builtins.toString diskoCfg.memSize}}

lib/tests.nix

@@ -1,37 +1,48 @@
-{ lib
-, makeTest
-, eval-config
-, ...
+{
+  lib,
+  makeTest,
+  eval-config,
+  ...
 }:
 
 let
   testLib = {
     # this takes a nixos config and changes the disk devices so we can run them inside the qemu test runner
     # basically changes all the disk.*.devices to something like /dev/vda or /dev/vdb etc.
-    prepareDiskoConfig = cfg: devices:
+    prepareDiskoConfig =
+      cfg: devices:
       let
         cleanedTopLevel = lib.filterAttrsRecursive (n: _: !lib.hasPrefix "_" n) cfg;
 
-        preparedDisks = lib.foldlAttrs
-          (acc: n: v: {
-            devices = lib.tail acc.devices;
-            grub-devices = acc.grub-devices ++ (lib.optional (lib.any (part: (part.type or "") == "EF02") (lib.attrValues (v.content.partitions or { }))) (lib.head acc.devices));
-            disks = acc.disks // {
-              "${n}" = v // {
-                device = lib.head acc.devices;
-                content = v.content // { device = lib.head acc.devices; };
+        preparedDisks =
+          lib.foldlAttrs
+            (acc: n: v: {
+              devices = lib.tail acc.devices;
+              grub-devices =
+                acc.grub-devices
+                ++ (lib.optional (lib.any (part: (part.type or "") == "EF02") (
+                  lib.attrValues (v.content.partitions or { })
+                )) (lib.head acc.devices));
+              disks = acc.disks // {
+                "${n}" = v // {
+                  device = lib.head acc.devices;
+                  content = v.content // {
+                    device = lib.head acc.devices;
+                  };
+                };
               };
-            };
-          })
-          {
-            inherit devices;
-            grub-devices = [ ];
-            disks = { };
-          }
-          cleanedTopLevel.disko.devices.disk;
+            })
+            {
+              inherit devices;
+              grub-devices = [ ];
+              disks = { };
+            }
+            cleanedTopLevel.disko.devices.disk;
       in
-      cleanedTopLevel // {
-        boot.loader.grub.devices = if (preparedDisks.grub-devices != [ ]) then preparedDisks.grub-devices else [ "nodev" ];
+      cleanedTopLevel
+      // {
+        boot.loader.grub.devices =
+          if (preparedDisks.grub-devices != [ ]) then preparedDisks.grub-devices else [ "nodev" ];
         disko.devices = cleanedTopLevel.disko.devices // {
           disk = preparedDisks.disks;
         };
@@ -58,33 +69,31 @@ let
 
     # This is the test generator for a disko test
     makeDiskoTest =
-      { name
-      , disko-config
-      , extendModules ? null
-      , pkgs ? import <nixpkgs> { }
-      , extraTestScript ? ""
-      , bootCommands ? ""
-      , extraInstallerConfig ? { }
-      , extraSystemConfig ? { }
-      , efi ? !pkgs.stdenv.hostPlatform.isRiscV64
-      , postDisko ? ""
-      , testMode ? "module" # can be one of direct module cli
-      , testBoot ? true # if we actually want to test booting or just create/mount
-      , enableOCR ? false
+      {
+        name,
+        disko-config,
+        extendModules ? null,
+        pkgs ? import <nixpkgs> { },
+        extraTestScript ? "",
+        bootCommands ? "",
+        extraInstallerConfig ? { },
+        extraSystemConfig ? { },
+        efi ? !pkgs.stdenv.hostPlatform.isRiscV64,
+        postDisko ? "",
+        testMode ? "module", # can be one of direct module cli
+        testBoot ? true, # if we actually want to test booting or just create/mount
+        enableOCR ? false,
       }:
       let
-        makeTest' = args:
+        makeTest' =
+          args:
           makeTest args {
             inherit pkgs;
             inherit (pkgs) system;
           };
         # for installation we skip /dev/vda because it is the test runner disk
 
-        importedDiskoConfig =
-          if builtins.isPath disko-config then
-            import disko-config
-          else
-            disko-config;
+        importedDiskoConfig = if builtins.isPath disko-config then import disko-config else disko-config;
 
         diskoConfigWithArgs =
           if builtins.isFunction importedDiskoConfig then
@@ -104,79 +113,93 @@ let
         tsp-config = tsp-generator.config testConfigBooted;
         num-disks = builtins.length (lib.attrNames testConfigBooted.disko.devices.disk);
 
-        installed-system = { config, ... }: {
-          imports = [
-            (lib.optionalAttrs (testMode == "direct") tsp-config)
-            (lib.optionalAttrs (testMode == "module") {
-              disko.enableConfig = true;
-              imports = [
-                ../module.nix
-                testConfigBooted
-              ];
-            })
-          ];
+        installed-system =
+          { config, ... }:
+          {
+            imports = [
+              (lib.optionalAttrs (testMode == "direct") tsp-config)
+              (lib.optionalAttrs (testMode == "module") {
+                disko.enableConfig = true;
+                imports = [
+                  ../module.nix
+                  testConfigBooted
+                ];
+              })
+            ];
 
-          # config for tests to make them run faster or work at all
-          documentation.enable = false;
-          hardware.enableAllFirmware = lib.mkForce false;
-          # FIXME: we don't have an systemd in stage-1 equialvent for this
-          boot.initrd.preDeviceCommands = lib.mkIf (!config.boot.initrd.systemd.enable) ''
-            echo -n 'secretsecret' > /tmp/secret.key
-          '';
-          boot.consoleLogLevel = lib.mkForce 100;
-          boot.loader.systemd-boot.enable = lib.mkDefault efi;
-        };
+            # config for tests to make them run faster or work at all
+            documentation.enable = false;
+            hardware.enableAllFirmware = lib.mkForce false;
+            # FIXME: we don't have an systemd in stage-1 equialvent for this
+            boot.initrd.preDeviceCommands = lib.mkIf (!config.boot.initrd.systemd.enable) ''
+              echo -n 'secretsecret' > /tmp/secret.key
+            '';
+            boot.consoleLogLevel = lib.mkForce 100;
+            boot.loader.systemd-boot.enable = lib.mkDefault efi;
+          };
 
         installed-system-eval = eval-config {
           modules = [ installed-system ];
           inherit (pkgs) system;
         };
 
-        installedTopLevel = ((if extendModules != null then extendModules else installed-system-eval.extendModules) {
-          modules = [
-            ({ config, ... }: {
-              imports = [
-                extraSystemConfig
-                ({ modulesPath, ... }: {
-                  imports = [
-                    (modulesPath + "/testing/test-instrumentation.nix") # we need these 2 modules always to be able to run the tests
-                    (modulesPath + "/profiles/qemu-guest.nix")
-                  ];
-                  disko.devices = lib.mkForce testConfigBooted.disko.devices;
-                })
-              ];
-
-              # since we boot on a different machine, the efi payload needs to be portable
-              boot.loader.grub.efiInstallAsRemovable = efi;
-              boot.loader.grub.efiSupport = efi;
-              boot.loader.systemd-boot.graceful = true;
-
-              # we always want the bind-mounted nix store. otherwise tests take forever
-              fileSystems."/nix/store" = lib.mkForce {
-                device = "nix-store";
-                fsType = "9p";
-                neededForBoot = true;
-                options = [ "trans=virtio" "version=9p2000.L" "cache=loose" ];
-              };
-              boot.zfs.devNodes = "/dev/disk/by-uuid"; # needed because /dev/disk/by-id is empty in qemu-vms
-
-              # grub will install to these devices, we need to force those or we are offset by 1
-              # we use mkOveride 70, so that users can override this with mkForce in case they are testing grub mirrored boots
-              boot.loader.grub.devices = lib.mkOverride 70 testConfigInstall.boot.loader.grub.devices;
-
-              assertions = [
+        installedTopLevel =
+          ((if extendModules != null then extendModules else installed-system-eval.extendModules) {
+            modules = [
+              (
+                { config, ... }:
                 {
-                  assertion = builtins.length config.boot.loader.grub.mirroredBoots > 1 -> config.boot.loader.grub.devices == [ ];
-                  message = ''
-                    When using `--vm-test` in combination with `mirroredBoots`,
-                    it is necessary to configure `boot.loader.grub.devices` as an empty list by setting `boot.loader.grub.devices = lib.mkForce [];`.
-                    This adjustment is crucial because the `--vm-test` mechanism automatically overrides the grub boot devices as part of the virtual machine test.
-                  '';
+                  imports = [
+                    extraSystemConfig
+                    (
+                      { modulesPath, ... }:
+                      {
+                        imports = [
+                          (modulesPath + "/testing/test-instrumentation.nix") # we need these 2 modules always to be able to run the tests
+                          (modulesPath + "/profiles/qemu-guest.nix")
+                        ];
+                        disko.devices = lib.mkForce testConfigBooted.disko.devices;
+                      }
+                    )
+                  ];
+
+                  # since we boot on a different machine, the efi payload needs to be portable
+                  boot.loader.grub.efiInstallAsRemovable = efi;
+                  boot.loader.grub.efiSupport = efi;
+                  boot.loader.systemd-boot.graceful = true;
+
+                  # we always want the bind-mounted nix store. otherwise tests take forever
+                  fileSystems."/nix/store" = lib.mkForce {
+                    device = "nix-store";
+                    fsType = "9p";
+                    neededForBoot = true;
+                    options = [
+                      "trans=virtio"
+                      "version=9p2000.L"
+                      "cache=loose"
+                    ];
+                  };
+                  boot.zfs.devNodes = "/dev/disk/by-uuid"; # needed because /dev/disk/by-id is empty in qemu-vms
+
+                  # grub will install to these devices, we need to force those or we are offset by 1
+                  # we use mkOveride 70, so that users can override this with mkForce in case they are testing grub mirrored boots
+                  boot.loader.grub.devices = lib.mkOverride 70 testConfigInstall.boot.loader.grub.devices;
+
+                  assertions = [
+                    {
+                      assertion =
+                        builtins.length config.boot.loader.grub.mirroredBoots > 1 -> config.boot.loader.grub.devices == [ ];
+                      message = ''
+                        When using `--vm-test` in combination with `mirroredBoots`,
+                        it is necessary to configure `boot.loader.grub.devices` as an empty list by setting `boot.loader.grub.devices = lib.mkForce [];`.
+                        This adjustment is crucial because the `--vm-test` mechanism automatically overrides the grub boot devices as part of the virtual machine test.
+                      '';
+                    }
+                  ];
                 }
-              ];
-            })
-          ];
-        }).config.system.build.toplevel;
+              )
+            ];
+          }).config.system.build.toplevel;
 
       in
       makeTest' {
@@ -184,153 +207,177 @@ let
         meta.timeout = 600; # 10 minutes
         inherit enableOCR;
 
-        nodes.machine = { pkgs, ... }: {
-          imports = [
-            (lib.optionalAttrs (testMode == "module") {
-              imports = [
-                ../module.nix
-              ];
-              disko = {
-                enableConfig = false;
-                checkScripts = true;
-                devices = testConfigInstall.disko.devices;
-              };
-            })
-            extraInstallerConfig
+        nodes.machine =
+          { pkgs, ... }:
+          {
+            imports = [
+              (lib.optionalAttrs (testMode == "module") {
+                imports = [
+                  ../module.nix
+                ];
+                disko = {
+                  enableConfig = false;
+                  checkScripts = true;
+                  devices = testConfigInstall.disko.devices;
+                };
+              })
+              extraInstallerConfig
 
-            # from base.nix
-            ({ config, ... }: {
-              boot.supportedFilesystems =
-                [ "btrfs" "cifs" "f2fs" "jfs" "ntfs" "reiserfs" "vfat" "xfs" ] ++
-                lib.optional (config.networking.hostId != null && lib.meta.availableOn pkgs.stdenv.hostPlatform config.boot.zfs.package) "zfs";
-            })
+              # from base.nix
+              (
+                { config, ... }:
+                {
+                  boot.supportedFilesystems =
+                    [
+                      "btrfs"
+                      "cifs"
+                      "f2fs"
+                      "jfs"
+                      "ntfs"
+                      "reiserfs"
+                      "vfat"
+                      "xfs"
+                    ]
+                    ++ lib.optional (
+                      config.networking.hostId != null
+                      && lib.meta.availableOn pkgs.stdenv.hostPlatform config.boot.zfs.package
+                    ) "zfs";
+                }
+              )
 
-            (if lib.versionAtLeast (lib.versions.majorMinor lib.version) "23.11" then {
-              boot.swraid.enable = true;
-            } else {
-              boot.initrd.services.swraid.enable = true;
-            })
-          ];
+              (
+                if lib.versionAtLeast (lib.versions.majorMinor lib.version) "23.11" then
+                  {
+                    boot.swraid.enable = true;
+                  }
+                else
+                  {
+                    boot.initrd.services.swraid.enable = true;
+                  }
+              )
+            ];
 
-          systemd.services.mdmonitor.enable = false; # silence some weird warnings
+            systemd.services.mdmonitor.enable = false; # silence some weird warnings
 
-          environment.systemPackages = [
-            pkgs.jq
-          ];
+            environment.systemPackages = [
+              pkgs.jq
+            ];
 
-          # speed-up eval
-          documentation.enable = false;
+            # speed-up eval
+            documentation.enable = false;
 
-          nix.settings = {
-            substituters = lib.mkForce [ ];
-            hashed-mirrors = null;
-            connect-timeout = 1;
+            nix.settings = {
+              substituters = lib.mkForce [ ];
+              hashed-mirrors = null;
+              connect-timeout = 1;
+            };
+
+            networking.hostId = lib.mkIf (
+              (testConfigInstall ? networking.hostId) && (testConfigInstall.networking.hostId != null)
+            ) testConfigInstall.networking.hostId;
+
+            virtualisation.emptyDiskImages = builtins.genList (_: 4096) num-disks;
+
+            # useful for debugging via repl
+            system.build.systemToInstall = installed-system-eval;
           };
 
-          networking.hostId = lib.mkIf
-            (
-              (testConfigInstall ? networking.hostId) && (testConfigInstall.networking.hostId != null)
-            )
-            testConfigInstall.networking.hostId;
+        testScript =
+          { nodes, ... }:
+          ''
+            def disks(oldmachine, num_disks):
+                disk_flags = []
+                for i in range(num_disks):
+                    disk_flags += [
+                      '-drive',
+                      f"file={oldmachine.state_dir}/empty{i}.qcow2,id=drive{i + 1},if=none,index={i + 1},werror=report",
+                      '-device',
+                      f"virtio-blk-pci,drive=drive{i + 1}"
+                    ]
+                return disk_flags
 
-          virtualisation.emptyDiskImages = builtins.genList (_: 4096) num-disks;
-
-          # useful for debugging via repl
-          system.build.systemToInstall = installed-system-eval;
-        };
-
-        testScript = { nodes, ... }: ''
-          def disks(oldmachine, num_disks):
-              disk_flags = []
-              for i in range(num_disks):
-                  disk_flags += [
-                    '-drive',
-                    f"file={oldmachine.state_dir}/empty{i}.qcow2,id=drive{i + 1},if=none,index={i + 1},werror=report",
-                    '-device',
-                    f"virtio-blk-pci,drive=drive{i + 1}"
-                  ]
-              return disk_flags
-
-          def create_test_machine(
-              oldmachine=None, **kwargs
-          ):  # taken from <nixpkgs/nixos/tests/installer.nix>
-              start_command = [
-                  "${pkgs.qemu_test}/bin/qemu-kvm",
-                  "-cpu",
-                  "max",
-                  "-m",
-                  "1024",
-                  "-virtfs",
-                  "local,path=/nix/store,security_model=none,mount_tag=nix-store",
-                  *disks(oldmachine, ${toString num-disks})
-              ]
-              ${lib.optionalString efi ''
-                start_command += ["-drive",
-                  "if=pflash,format=raw,unit=0,readonly=on,file=${pkgs.OVMF.firmware}",
-                  "-drive",
-                  "if=pflash,format=raw,unit=1,readonly=on,file=${pkgs.OVMF.variables}"
+            def create_test_machine(
+                oldmachine=None, **kwargs
+            ):  # taken from <nixpkgs/nixos/tests/installer.nix>
+                start_command = [
+                    "${pkgs.qemu_test}/bin/qemu-kvm",
+                    "-cpu",
+                    "max",
+                    "-m",
+                    "1024",
+                    "-virtfs",
+                    "local,path=/nix/store,security_model=none,mount_tag=nix-store",
+                    *disks(oldmachine, ${toString num-disks})
                 ]
-              ''}
-              machine = create_machine(start_command=" ".join(start_command), **kwargs)
-              driver.machines.append(machine)
-              return machine
+                ${lib.optionalString efi ''
+                  start_command += ["-drive",
+                    "if=pflash,format=raw,unit=0,readonly=on,file=${pkgs.OVMF.firmware}",
+                    "-drive",
+                    "if=pflash,format=raw,unit=1,readonly=on,file=${pkgs.OVMF.variables}"
+                  ]
+                ''}
+                machine = create_machine(start_command=" ".join(start_command), **kwargs)
+                driver.machines.append(machine)
+                return machine
 
-          machine.start()
-          machine.succeed("echo -n 'additionalSecret' > /tmp/additionalSecret.key")
-          machine.succeed("echo -n 'secretsecret' > /tmp/secret.key")
-          ${lib.optionalString (testMode == "direct") ''
-            # running direct mode
-            machine.succeed("${lib.getExe tsp-format}")
-            machine.succeed("${lib.getExe tsp-mount}")
-            machine.succeed("${lib.getExe tsp-mount}") # verify that mount is idempotent
-            machine.succeed("${lib.getExe tsp-unmount}")
-            machine.succeed("${lib.getExe tsp-unmount}") # verify that umount is idempotent
-            machine.succeed("${lib.getExe tsp-mount}") # verify that mount is idempotent
-            machine.succeed("${lib.getExe tsp-disko} --yes-wipe-all-disks") # verify that we can destroy and recreate
-            machine.succeed("mkdir -p /mnt/home")
-            machine.succeed("touch /mnt/home/testfile")
-            machine.succeed("${lib.getExe tsp-format}") # verify that format is idempotent
-            machine.succeed("test -e /mnt/home/testfile")
-          ''}
-          ${lib.optionalString (testMode == "module") ''
-            #  running module mode
-            machine.succeed("${lib.getExe nodes.machine.system.build.format}")
-            machine.succeed("${lib.getExe nodes.machine.system.build.mount}")
-            machine.succeed("${lib.getExe nodes.machine.system.build.mount}") # verify that mount is idempotent
-            machine.succeed("${lib.getExe nodes.machine.system.build.destroyFormatMount} --yes-wipe-all-disks") # verify that we can destroy and recreate again
-            machine.succeed("mkdir -p /mnt/home")
-            machine.succeed("touch /mnt/home/testfile")
-            machine.succeed("${lib.getExe nodes.machine.system.build.format}") # verify that format is idempotent
-            machine.succeed("test -e /mnt/home/testfile")
-          ''}
-
-          ${postDisko}
-
-          ${lib.optionalString testBoot ''
-            # mount nix-store in /mnt
-            machine.succeed("mkdir -p /mnt/nix/store")
-            machine.succeed("mount --bind /nix/store /mnt/nix/store")
-
-            machine.succeed("nix-store --load-db < ${pkgs.closureInfo {rootPaths = [installedTopLevel];}}/registration")
-
-            # fix "this is not a NixOS installation"
-            machine.succeed("mkdir -p /mnt/etc")
-            machine.succeed("touch /mnt/etc/NIXOS")
-
-            machine.succeed("mkdir -p /mnt/nix/var/nix/profiles")
-            machine.succeed("nix-env -p /mnt/nix/var/nix/profiles/system --set ${installedTopLevel}")
-            machine.succeed("NIXOS_INSTALL_BOOTLOADER=1 nixos-enter --root /mnt -- ${installedTopLevel}/bin/switch-to-configuration boot")
-            machine.succeed("sync")
-            machine.shutdown()
-
-            machine = create_test_machine(oldmachine=machine, name="booted_machine")
             machine.start()
-            ${bootCommands}
-            machine.wait_for_unit("local-fs.target")
-          ''}
+            machine.succeed("echo -n 'additionalSecret' > /tmp/additionalSecret.key")
+            machine.succeed("echo -n 'secretsecret' > /tmp/secret.key")
+            ${lib.optionalString (testMode == "direct") ''
+              # running direct mode
+              machine.succeed("${lib.getExe tsp-format}")
+              machine.succeed("${lib.getExe tsp-mount}")
+              machine.succeed("${lib.getExe tsp-mount}") # verify that mount is idempotent
+              machine.succeed("${lib.getExe tsp-unmount}")
+              machine.succeed("${lib.getExe tsp-unmount}") # verify that umount is idempotent
+              machine.succeed("${lib.getExe tsp-mount}") # verify that mount is idempotent
+              machine.succeed("${lib.getExe tsp-disko} --yes-wipe-all-disks") # verify that we can destroy and recreate
+              machine.succeed("mkdir -p /mnt/home")
+              machine.succeed("touch /mnt/home/testfile")
+              machine.succeed("${lib.getExe tsp-format}") # verify that format is idempotent
+              machine.succeed("test -e /mnt/home/testfile")
+            ''}
+            ${lib.optionalString (testMode == "module") ''
+              #  running module mode
+              machine.succeed("${lib.getExe nodes.machine.system.build.format}")
+              machine.succeed("${lib.getExe nodes.machine.system.build.mount}")
+              machine.succeed("${lib.getExe nodes.machine.system.build.mount}") # verify that mount is idempotent
+              machine.succeed("${lib.getExe nodes.machine.system.build.destroyFormatMount} --yes-wipe-all-disks") # verify that we can destroy and recreate again
+              machine.succeed("mkdir -p /mnt/home")
+              machine.succeed("touch /mnt/home/testfile")
+              machine.succeed("${lib.getExe nodes.machine.system.build.format}") # verify that format is idempotent
+              machine.succeed("test -e /mnt/home/testfile")
+            ''}
 
-          ${extraTestScript}
-        '';
+            ${postDisko}
+
+            ${lib.optionalString testBoot ''
+              # mount nix-store in /mnt
+              machine.succeed("mkdir -p /mnt/nix/store")
+              machine.succeed("mount --bind /nix/store /mnt/nix/store")
+
+              machine.succeed("nix-store --load-db < ${
+                pkgs.closureInfo { rootPaths = [ installedTopLevel ]; }
+              }/registration")
+
+              # fix "this is not a NixOS installation"
+              machine.succeed("mkdir -p /mnt/etc")
+              machine.succeed("touch /mnt/etc/NIXOS")
+
+              machine.succeed("mkdir -p /mnt/nix/var/nix/profiles")
+              machine.succeed("nix-env -p /mnt/nix/var/nix/profiles/system --set ${installedTopLevel}")
+              machine.succeed("NIXOS_INSTALL_BOOTLOADER=1 nixos-enter --root /mnt -- ${installedTopLevel}/bin/switch-to-configuration boot")
+              machine.succeed("sync")
+              machine.shutdown()
+
+              machine = create_test_machine(oldmachine=machine, name="booted_machine")
+              machine.start()
+              ${bootCommands}
+              machine.wait_for_unit("local-fs.target")
+            ''}
+
+            ${extraTestScript}
+          '';
       };
   };
 in

lib/types/btrfs.nix

@@ -1,60 +1,71 @@
-{ config, options, diskoLib, lib, rootMountPoint, parent, device, ... }:
+{
+  config,
+  options,
+  diskoLib,
+  lib,
+  rootMountPoint,
+  parent,
+  device,
+  ...
+}:
 let
   swapType = lib.mkOption {
-    type = lib.types.attrsOf (lib.types.submodule ({ name, ... }: {
-      options = {
-        size = lib.mkOption {
-          type = lib.types.strMatching "^([0-9]+[KMGTP])?$";
-          description = "Size of the swap file (e.g. 2G)";
-        };
+    type = lib.types.attrsOf (
+      lib.types.submodule (
+        { name, ... }:
+        {
+          options = {
+            size = lib.mkOption {
+              type = lib.types.strMatching "^([0-9]+[KMGTP])?$";
+              description = "Size of the swap file (e.g. 2G)";
+            };
 
-        path = lib.mkOption {
-          type = lib.types.str;
-          default = name;
-          description = "Path to the swap file (relative to the mountpoint)";
-        };
+            path = lib.mkOption {
+              type = lib.types.str;
+              default = name;
+              description = "Path to the swap file (relative to the mountpoint)";
+            };
 
-        priority = lib.mkOption {
-          type = lib.types.nullOr lib.types.int;
-          default = null;
-          description = ''
-            Specify the priority of the swap file. Priority is a value between 0 and 32767.
-            Higher numbers indicate higher priority.
-            null lets the kernel choose a priority, which will show up as a negative value.
-          '';
-        };
+            priority = lib.mkOption {
+              type = lib.types.nullOr lib.types.int;
+              default = null;
+              description = ''
+                Specify the priority of the swap file. Priority is a value between 0 and 32767.
+                Higher numbers indicate higher priority.
+                null lets the kernel choose a priority, which will show up as a negative value.
+              '';
+            };
 
-        options = lib.mkOption {
-          type = lib.types.listOf lib.types.nonEmptyStr;
-          default = [ "defaults" ];
-          example = [ "nofail" ];
-          description = "Options used to mount the swap.";
-        };
-      };
-    }));
+            options = lib.mkOption {
+              type = lib.types.listOf lib.types.nonEmptyStr;
+              default = [ "defaults" ];
+              example = [ "nofail" ];
+              description = "Options used to mount the swap.";
+            };
+          };
+        }
+      )
+    );
     default = { };
     description = "Swap files";
   };
 
-  swapConfig = { mountpoint, swap }:
+  swapConfig =
+    { mountpoint, swap }:
     {
-      swapDevices = builtins.map
-        (file: {
-          device = "${mountpoint}/${file.path}";
-          inherit (file) priority options;
-        })
-        (lib.attrValues swap);
+      swapDevices = builtins.map (file: {
+        device = "${mountpoint}/${file.path}";
+        inherit (file) priority options;
+      }) (lib.attrValues swap);
     };
 
-  swapCreate = mountpoint: swap:
-    lib.concatMapStringsSep
-      "\n"
-      (file: ''
-        if ! test -e "${mountpoint}/${file.path}"; then
-          btrfs filesystem mkswapfile --size ${file.size} "${mountpoint}/${file.path}"
-        fi
-      '')
-      (lib.attrValues swap);
+  swapCreate =
+    mountpoint: swap:
+    lib.concatMapStringsSep "\n" (file: ''
+      if ! test -e "${mountpoint}/${file.path}"; then
+        btrfs filesystem mkswapfile --size ${file.size} "${mountpoint}/${file.path}"
+      fi
+    '') (lib.attrValues swap);
 
 in
 {
@@ -80,37 +91,42 @@ in
       description = "A list of options to pass to mount.";
     };
     subvolumes = lib.mkOption {
-      type = lib.types.attrsOf (lib.types.submodule ({ config, ... }: {
-        options = {
-          name = lib.mkOption {
-            type = lib.types.str;
-            default = config._module.args.name;
-            description = "Name of the BTRFS subvolume.";
-          };
-          type = lib.mkOption {
-            type = lib.types.enum [ "btrfs_subvol" ];
-            default = "btrfs_subvol";
-            internal = true;
-            description = "Type";
-          };
-          extraArgs = lib.mkOption {
-            type = lib.types.listOf lib.types.str;
-            default = [ ];
-            description = "Extra arguments";
-          };
-          mountOptions = lib.mkOption {
-            type = lib.types.listOf lib.types.str;
-            default = [ "defaults" ];
-            description = "Options to pass to mount";
-          };
-          mountpoint = lib.mkOption {
-            type = lib.types.nullOr diskoLib.optionTypes.absolute-pathname;
-            default = null;
-            description = "Location to mount the subvolume to.";
-          };
-          swap = swapType;
-        };
-      }));
+      type = lib.types.attrsOf (
+        lib.types.submodule (
+          { config, ... }:
+          {
+            options = {
+              name = lib.mkOption {
+                type = lib.types.str;
+                default = config._module.args.name;
+                description = "Name of the BTRFS subvolume.";
+              };
+              type = lib.mkOption {
+                type = lib.types.enum [ "btrfs_subvol" ];
+                default = "btrfs_subvol";
+                internal = true;
+                description = "Type";
+              };
+              extraArgs = lib.mkOption {
+                type = lib.types.listOf lib.types.str;
+                default = [ ];
+                description = "Extra arguments";
+              };
+              mountOptions = lib.mkOption {
+                type = lib.types.listOf lib.types.str;
+                default = [ "defaults" ];
+                description = "Options to pass to mount";
+              };
+              mountpoint = lib.mkOption {
+                type = lib.types.nullOr diskoLib.optionTypes.absolute-pathname;
+                default = null;
+                description = "Location to mount the subvolume to.";
+              };
+              swap = swapType;
+            };
+          }
+        )
+      );
       default = { };
       description = "Subvolumes to define for BTRFS.";
     };
@@ -138,9 +154,9 @@ in
         if ! (blkid "${config.device}" -o export | grep -q '^TYPE='); then
           mkfs.btrfs "${config.device}" ${toString config.extraArgs}
         fi
-        ${lib.optionalString (config.swap != {} || config.subvolumes != {}) ''
+        ${lib.optionalString (config.swap != { } || config.subvolumes != { }) ''
           if (blkid "${config.device}" -o export | grep -q '^TYPE=btrfs$'); then
-            ${lib.optionalString (config.swap != {}) ''
+            ${lib.optionalString (config.swap != { }) ''
               (
                 MNTPOINT=$(mktemp -d)
                 mount ${device} "$MNTPOINT" -o subvol=/
@@ -169,79 +185,84 @@ in
       inherit config options;
       default =
         let
-          subvolMounts = lib.concatMapAttrs
-            (_: subvol:
-              lib.warnIf (subvol.mountOptions != (options.subvolumes.type.getSubOptions [ ]).mountOptions.default && subvol.mountpoint == null)
-                "Subvolume ${subvol.name} has mountOptions but no mountpoint. See upgrade guide (2023-07-09 121df48)."
-                lib.optionalAttrs
-                (subvol.mountpoint != null)
-                {
-                  ${subvol.mountpoint} = ''
-                    if ! findmnt "${config.device}" "${rootMountPoint}${subvol.mountpoint}" > /dev/null 2>&1; then
-                      mount "${config.device}" "${rootMountPoint}${subvol.mountpoint}" \
-                      ${lib.concatMapStringsSep " " (opt: "-o ${opt}") (subvol.mountOptions ++ [ "subvol=${subvol.name}" ])} \
-                      -o X-mount.mkdir
-                    fi
-                  '';
-                }
-            )
-            config.subvolumes;
+          subvolMounts = lib.concatMapAttrs (
+            _: subvol:
+            lib.warnIf
+              (
+                subvol.mountOptions != (options.subvolumes.type.getSubOptions [ ]).mountOptions.default
+                && subvol.mountpoint == null
+              )
+              "Subvolume ${subvol.name} has mountOptions but no mountpoint. See upgrade guide (2023-07-09 121df48)."
+              lib.optionalAttrs
+              (subvol.mountpoint != null)
+              {
+                ${subvol.mountpoint} = ''
+                  if ! findmnt "${config.device}" "${rootMountPoint}${subvol.mountpoint}" > /dev/null 2>&1; then
+                    mount "${config.device}" "${rootMountPoint}${subvol.mountpoint}" \
+                    ${
+                      lib.concatMapStringsSep " " (opt: "-o ${opt}") (subvol.mountOptions ++ [ "subvol=${subvol.name}" ])
+                    } \
+                    -o X-mount.mkdir
+                  fi
+                '';
+              }
+          ) config.subvolumes;
         in
         {
-          fs = subvolMounts // lib.optionalAttrs (config.mountpoint != null) {
-            ${config.mountpoint} = ''
-              if ! findmnt "${config.device}" "${rootMountPoint}${config.mountpoint}" > /dev/null 2>&1; then
-                mount "${config.device}" "${rootMountPoint}${config.mountpoint}" \
-                ${lib.concatMapStringsSep " " (opt: "-o ${opt}") config.mountOptions} \
-                -o X-mount.mkdir
-              fi
-            '';
-          };
+          fs =
+            subvolMounts
+            // lib.optionalAttrs (config.mountpoint != null) {
+              ${config.mountpoint} = ''
+                if ! findmnt "${config.device}" "${rootMountPoint}${config.mountpoint}" > /dev/null 2>&1; then
+                  mount "${config.device}" "${rootMountPoint}${config.mountpoint}" \
+                  ${lib.concatMapStringsSep " " (opt: "-o ${opt}") config.mountOptions} \
+                  -o X-mount.mkdir
+                fi
+              '';
+            };
         };
     };
     _unmount = diskoLib.mkUnmountOption {
       inherit config options;
       default =
         let
-          subvolMounts = lib.concatMapAttrs
-            (_: subvol:
-              lib.optionalAttrs
-              (subvol.mountpoint != null)
-              {
-                ${subvol.mountpoint} = ''
-                  if findmnt "${config.device}" "${rootMountPoint}${subvol.mountpoint}" > /dev/null 2>&1; then
-                    umount "${rootMountPoint}${subvol.mountpoint}"
-                  fi
-                '';
-              }
-            )
-            config.subvolumes;
+          subvolMounts = lib.concatMapAttrs (
+            _: subvol:
+            lib.optionalAttrs (subvol.mountpoint != null) {
+              ${subvol.mountpoint} = ''
+                if findmnt "${config.device}" "${rootMountPoint}${subvol.mountpoint}" > /dev/null 2>&1; then
+                  umount "${rootMountPoint}${subvol.mountpoint}"
+                fi
+              '';
+            }
+          ) config.subvolumes;
         in
         {
-          fs = subvolMounts // lib.optionalAttrs (config.mountpoint != null) {
-            ${config.mountpoint} = ''
-              if findmnt "${config.device}" "${rootMountPoint}${config.mountpoint}" > /dev/null 2>&1; then
-                umount "${rootMountPoint}${config.mountpoint}"
-              fi
-            '';
-          };
+          fs =
+            subvolMounts
+            // lib.optionalAttrs (config.mountpoint != null) {
+              ${config.mountpoint} = ''
+                if findmnt "${config.device}" "${rootMountPoint}${config.mountpoint}" > /dev/null 2>&1; then
+                  umount "${rootMountPoint}${config.mountpoint}"
+                fi
+              '';
+            };
         };
     };
     _config = lib.mkOption {
       internal = true;
       readOnly = true;
       default = [
-        (map
-          (subvol:
-            lib.optional (subvol.mountpoint != null) {
-              fileSystems.${subvol.mountpoint} = {
-                device = config.device;
-                fsType = "btrfs";
-                options = subvol.mountOptions ++ [ "subvol=${subvol.name}" ];
-              };
-            }
-          )
-          (lib.attrValues config.subvolumes))
+        (map (
+          subvol:
+          lib.optional (subvol.mountpoint != null) {
+            fileSystems.${subvol.mountpoint} = {
+              device = config.device;
+              fsType = "btrfs";
+              options = subvol.mountOptions ++ [ "subvol=${subvol.name}" ];
+            };
+          }
+        ) (lib.attrValues config.subvolumes))
         (lib.optional (config.mountpoint != null) {
           fileSystems.${config.mountpoint} = {
             device = config.device;
@@ -249,11 +270,12 @@ in
             options = config.mountOptions;
           };
         })
-        (map
-          (subvol: swapConfig {
+        (map (
+          subvol:
+          swapConfig {
             inherit (subvol) mountpoint swap;
-          })
-          (lib.attrValues config.subvolumes))
+          }
+        ) (lib.attrValues config.subvolumes))
         (swapConfig {
           inherit (config) mountpoint swap;
         })
@@ -264,8 +286,10 @@ in
       internal = true;
       readOnly = true;
       type = lib.types.functionTo (lib.types.listOf lib.types.package);
-      default = pkgs:
-        [ pkgs.btrfs-progs pkgs.gnugrep ];
+      default = pkgs: [
+        pkgs.btrfs-progs
+        pkgs.gnugrep
+      ];
       description = "Packages";
     };
   };

lib/types/disk.nix

@@ -1,4 +1,10 @@
-{ config, options, lib, diskoLib, ... }:
+{
+  config,
+  options,
+  lib,
+  diskoLib,
+  ...
+}:
 {
   options = {
     name = lib.mkOption {
@@ -32,13 +38,20 @@
       '';
       default = "2G";
     };
-    content = diskoLib.deviceType { parent = config; device = config.device; };
+    content = diskoLib.deviceType {
+      parent = config;
+      device = config.device;
+    };
     _meta = lib.mkOption {
       internal = true;
       readOnly = true;
       type = diskoLib.jsonType;
-      default =
-        lib.optionalAttrs (config.content != null) (config.content._meta [ "disk" config.device ]);
+      default = lib.optionalAttrs (config.content != null) (
+        config.content._meta [
+          "disk"
+          config.device
+        ]
+      );
       description = "Metadata";
     };
     _create = diskoLib.mkCreateOption {
@@ -56,8 +69,7 @@
     _config = lib.mkOption {
       internal = true;
       readOnly = true;
-      default =
-        lib.optional (config.content != null) config.content._config;
+      default = lib.optional (config.content != null) config.content._config;
       description = "NixOS configuration";
     };
     _pkgs = lib.mkOption {

lib/types/filesystem.nix

@@ -1,4 +1,13 @@
-{ config, options, lib, diskoLib, rootMountPoint, parent, device, ... }:
+{
+  config,
+  options,
+  lib,
+  diskoLib,
+  rootMountPoint,
+  parent,
+  device,
+  ...
+}:
 {
   options = {
     type = lib.mkOption {
@@ -90,18 +99,32 @@
       internal = true;
       readOnly = true;
       # type = lib.types.functionTo (lib.types.listOf lib.types.package);
-      default = pkgs:
-        [ pkgs.util-linux pkgs.gnugrep ] ++ (
+      default =
+        pkgs:
+        [
+          pkgs.util-linux
+          pkgs.gnugrep
+        ]
+        ++ (
           # TODO add many more
-          if (config.format == "xfs") then [ pkgs.xfsprogs ]
-          else if (config.format == "btrfs") then [ pkgs.btrfs-progs ]
-          else if (config.format == "vfat") then [ pkgs.dosfstools ]
-          else if (config.format == "ext2") then [ pkgs.e2fsprogs ]
-          else if (config.format == "ext3") then [ pkgs.e2fsprogs ]
-          else if (config.format == "ext4") then [ pkgs.e2fsprogs ]
-          else if (config.format == "bcachefs") then [ pkgs.bcachefs-tools ]
-          else if (config.format == "f2fs") then [ pkgs.f2fs-tools ]
-          else [ ]
+          if (config.format == "xfs") then
+            [ pkgs.xfsprogs ]
+          else if (config.format == "btrfs") then
+            [ pkgs.btrfs-progs ]
+          else if (config.format == "vfat") then
+            [ pkgs.dosfstools ]
+          else if (config.format == "ext2") then
+            [ pkgs.e2fsprogs ]
+          else if (config.format == "ext3") then
+            [ pkgs.e2fsprogs ]
+          else if (config.format == "ext4") then
+            [ pkgs.e2fsprogs ]
+          else if (config.format == "bcachefs") then
+            [ pkgs.bcachefs-tools ]
+          else if (config.format == "f2fs") then
+            [ pkgs.f2fs-tools ]
+          else
+            [ ]
         );
       description = "Packages";
     };

lib/types/gpt.nix

@@ -1,4 +1,12 @@
-{ config, options, lib, diskoLib, parent, device, ... }:
+{
+  config,
+  options,
+  lib,
+  diskoLib,
+  parent,
+  device,
+  ...
+}:
 let
   sortedPartitions = lib.sort (x: y: x.priority < y.priority) (lib.attrValues config.partitions);
   sortedHybridPartitions = lib.filter (p: p.hybrid != null) sortedPartitions;
@@ -16,171 +24,210 @@ in
       description = "Device to use for the partition table";
     };
     partitions = lib.mkOption {
-      type = lib.types.attrsOf (lib.types.submodule ({ name, ... }@partition: {
-        options = {
-          type = lib.mkOption {
-            type =
-              let
-                hexPattern = len: "[A-Fa-f0-9]{${toString len}}";
-              in
-              lib.types.either
-                (lib.types.strMatching (hexPattern 4))
-                (lib.types.strMatching (lib.concatMapStringsSep "-" hexPattern [ 8 4 4 4 12 ]));
-            default = if partition.config.content != null && partition.config.content.type == "swap" then "8200" else "8300";
-            defaultText = ''8300 (Linux filesystem) normally, 8200 (Linux swap) if content.type is "swap"'';
-            description = ''
-              Filesystem type to use.
-              This can either be an sgdisk-specific short code (run sgdisk -L to see what is available),
-              or a fully specified GUID (see https://en.wikipedia.org/wiki/GUID_Partition_Table#Partition_type_GUIDs).
-            '';
-          };
-          device = lib.mkOption {
-            type = lib.types.str;
-            default =
-              if partition.config.uuid != null then
-                "/dev/disk/by-partuuid/${partition.config.uuid}"
-              else if config._parent.type == "mdadm" then
-                # workaround because mdadm partlabel do not appear in /dev/disk/by-partlabel
-                "/dev/disk/by-id/md-name-any:${config._parent.name}-part${toString partition.config._index}"
-              else
-                "/dev/disk/by-partlabel/${diskoLib.hexEscapeUdevSymlink partition.config.label}";
-            defaultText = ''
-              if `uuid` is provided:
-                /dev/disk/by-partuuid/''${partition.config.uuid}
-
-              otherwise, if the parent is an mdadm device:
-                /dev/disk/by-id/md-name-any:''${config._parent.name}-part''${toString partition.config._index}
-
-              otherwise:
-                /dev/disk/by-partlabel/''${diskoLib.hexEscapeUdevSymlink partition.config.label}
-            '';
-            description = "Device to use for the partition";
-          };
-          priority = lib.mkOption {
-            type = lib.types.int;
-            default =
-              if partition.config.size or "" == "100%" then
-                9001
-              else if partition.config.type == "EF02" then
-              # Boot partition should be created first, because some BIOS implementations require it.
-              # Priority defaults to 100 here to support any potential use-case for placing partitions prior to EF02
-                100
-              else
-                1000;
-            defaultText = ''
-              1000: normal partitions
-              9001: partitions with 100% size
-              100: boot partitions (EF02)
-            '';
-            description = "Priority of the partition, smaller values are created first";
-          };
-          name = lib.mkOption {
-            type = lib.types.str;
-            description = "Name of the partition";
-            default = name;
-          };
-          uuid = lib.mkOption {
-            type = lib.types.nullOr (lib.types.strMatching "[[:xdigit:]]{8}-[[:xdigit:]]{4}-[[:xdigit:]]{4}-[[:xdigit:]]{4}-[[:xdigit:]]{12}");
-            default = null;
-            defaultText = "`null` - generate a UUID when creating the partition";
-            example = "809b3a2b-828a-4730-95e1-75b6343e415a";
-            description = ''
-              The UUID (also known as GUID) of the partition. Note that this is distinct from the UUID of the filesystem.
-
-              You can generate a UUID with the command `uuidgen -r`.
-            '';
-          };
-          label = lib.mkOption {
-            type = lib.types.str;
-            default =
-              let
-                # 72 bytes is the maximum length of a GPT partition name
-                # the labels seem to be in UTF-16, so 2 bytes per character
-                limit = 36;
-                label = "${config._parent.type}-${config._parent.name}-${partition.config.name}";
-              in
-              if (lib.stringLength label) > limit then
-                builtins.substring 0 limit (builtins.hashString "sha256" label)
-              else
-                label;
-            defaultText = ''
-              ''${config._parent.type}-''${config._parent.name}-''${partition.config.name}
-
-              or a truncated hash of the above if it is longer than 36 characters
-            '';
-          };
-          size = lib.mkOption {
-            type = lib.types.either (lib.types.enum [ "100%" ]) (lib.types.strMatching "[0-9]+[KMGTP]?");
-            default = "0";
-            description = ''
-              Size of the partition, in sgdisk format.
-              sets end automatically with the + prefix
-              can be 100% for the whole remaining disk, will be done last in that case.
-            '';
-          };
-          alignment = lib.mkOption {
-            type = lib.types.int;
-            default = if (builtins.substring (builtins.stringLength partition.config.start - 1) 1 partition.config.start == "s" || (builtins.substring (builtins.stringLength partition.config.end - 1) 1 partition.config.end == "s")) then 1 else 0;
-            defaultText = "1 if the unit of start or end is sectors, 0 otherwise";
-            description = "Alignment of the partition, if sectors are used as start or end it can be aligned to 1";
-          };
-          start = lib.mkOption {
-            type = lib.types.str;
-            default = "0";
-            description = "Start of the partition, in sgdisk format, use 0 for next available range";
-          };
-          end = lib.mkOption {
-            type = lib.types.str;
-            default = if partition.config.size == "100%" then "-0" else "+${partition.config.size}";
-            defaultText = ''
-              if partition.config.size == "100%" then "-0" else "+''${partition.config.size}";
-            '';
-            description = ''
-              End of the partition, in sgdisk format.
-              Use + for relative sizes from the partitions start
-              or - for relative sizes from the disks end
-            '';
-          };
-          content = diskoLib.partitionType { parent = config; device = partition.config.device; };
-          hybrid = lib.mkOption {
-            type = lib.types.nullOr (lib.types.submodule ({ ... } @ hp: {
-              options = {
-                mbrPartitionType = lib.mkOption {
-                  type = lib.types.nullOr lib.types.str;
-                  default = null;
-                  description = "MBR type code";
-                };
-                mbrBootableFlag = lib.mkOption {
-                  type = lib.types.bool;
-                  default = false;
-                  description = "Set the bootable flag (aka the active flag) on any or all of your hybridized partitions";
-                };
-                _create = diskoLib.mkCreateOption {
-                  inherit config options;
-                  default = ''
-                    ${lib.optionalString (hp.config.mbrPartitionType != null) ''
-                      sfdisk --label-nested dos --part-type "${parent.device}" ${(toString partition.config._index)} ${hp.config.mbrPartitionType}
-                      udevadm trigger --subsystem-match=block
-                      udevadm settle
-                    ''}
-                    ${lib.optionalString hp.config.mbrBootableFlag ''
-                      sfdisk --label-nested dos --activate "${parent.device}" ${(toString partition.config._index)}
-                    ''}
-                  '';
-                };
+      type = lib.types.attrsOf (
+        lib.types.submodule (
+          { name, ... }@partition:
+          {
+            options = {
+              type = lib.mkOption {
+                type =
+                  let
+                    hexPattern = len: "[A-Fa-f0-9]{${toString len}}";
+                  in
+                  lib.types.either (lib.types.strMatching (hexPattern 4)) (
+                    lib.types.strMatching (
+                      lib.concatMapStringsSep "-" hexPattern [
+                        8
+                        4
+                        4
+                        4
+                        12
+                      ]
+                    )
+                  );
+                default =
+                  if partition.config.content != null && partition.config.content.type == "swap" then
+                    "8200"
+                  else
+                    "8300";
+                defaultText = ''8300 (Linux filesystem) normally, 8200 (Linux swap) if content.type is "swap"'';
+                description = ''
+                  Filesystem type to use.
+                  This can either be an sgdisk-specific short code (run sgdisk -L to see what is available),
+                  or a fully specified GUID (see https://en.wikipedia.org/wiki/GUID_Partition_Table#Partition_type_GUIDs).
+                '';
               };
-            }));
-            default = null;
-            description = "Entry to add to the Hybrid MBR table";
-          };
-          _index = lib.mkOption {
-            type = lib.types.int;
-            internal = true;
-            default = diskoLib.indexOf (x: x.name == partition.config.name) sortedPartitions 0;
-            defaultText = null;
-          };
-        };
-      }));
+              device = lib.mkOption {
+                type = lib.types.str;
+                default =
+                  if partition.config.uuid != null then
+                    "/dev/disk/by-partuuid/${partition.config.uuid}"
+                  else if config._parent.type == "mdadm" then
+                    # workaround because mdadm partlabel do not appear in /dev/disk/by-partlabel
+                    "/dev/disk/by-id/md-name-any:${config._parent.name}-part${toString partition.config._index}"
+                  else
+                    "/dev/disk/by-partlabel/${diskoLib.hexEscapeUdevSymlink partition.config.label}";
+                defaultText = ''
+                  if `uuid` is provided:
+                    /dev/disk/by-partuuid/''${partition.config.uuid}
+
+                  otherwise, if the parent is an mdadm device:
+                    /dev/disk/by-id/md-name-any:''${config._parent.name}-part''${toString partition.config._index}
+
+                  otherwise:
+                    /dev/disk/by-partlabel/''${diskoLib.hexEscapeUdevSymlink partition.config.label}
+                '';
+                description = "Device to use for the partition";
+              };
+              priority = lib.mkOption {
+                type = lib.types.int;
+                default =
+                  if partition.config.size or "" == "100%" then
+                    9001
+                  else if partition.config.type == "EF02" then
+                    # Boot partition should be created first, because some BIOS implementations require it.
+                    # Priority defaults to 100 here to support any potential use-case for placing partitions prior to EF02
+                    100
+                  else
+                    1000;
+                defaultText = ''
+                  1000: normal partitions
+                  9001: partitions with 100% size
+                  100: boot partitions (EF02)
+                '';
+                description = "Priority of the partition, smaller values are created first";
+              };
+              name = lib.mkOption {
+                type = lib.types.str;
+                description = "Name of the partition";
+                default = name;
+              };
+              uuid = lib.mkOption {
+                type = lib.types.nullOr (
+                  lib.types.strMatching "[[:xdigit:]]{8}-[[:xdigit:]]{4}-[[:xdigit:]]{4}-[[:xdigit:]]{4}-[[:xdigit:]]{12}"
+                );
+                default = null;
+                defaultText = "`null` - generate a UUID when creating the partition";
+                example = "809b3a2b-828a-4730-95e1-75b6343e415a";
+                description = ''
+                  The UUID (also known as GUID) of the partition. Note that this is distinct from the UUID of the filesystem.
+
+                  You can generate a UUID with the command `uuidgen -r`.
+                '';
+              };
+              label = lib.mkOption {
+                type = lib.types.str;
+                default =
+                  let
+                    # 72 bytes is the maximum length of a GPT partition name
+                    # the labels seem to be in UTF-16, so 2 bytes per character
+                    limit = 36;
+                    label = "${config._parent.type}-${config._parent.name}-${partition.config.name}";
+                  in
+                  if (lib.stringLength label) > limit then
+                    builtins.substring 0 limit (builtins.hashString "sha256" label)
+                  else
+                    label;
+                defaultText = ''
+                  ''${config._parent.type}-''${config._parent.name}-''${partition.config.name}
+
+                  or a truncated hash of the above if it is longer than 36 characters
+                '';
+              };
+              size = lib.mkOption {
+                type = lib.types.either (lib.types.enum [ "100%" ]) (lib.types.strMatching "[0-9]+[KMGTP]?");
+                default = "0";
+                description = ''
+                  Size of the partition, in sgdisk format.
+                  sets end automatically with the + prefix
+                  can be 100% for the whole remaining disk, will be done last in that case.
+                '';
+              };
+              alignment = lib.mkOption {
+                type = lib.types.int;
+                default =
+                  if
+                    (
+                      builtins.substring (builtins.stringLength partition.config.start - 1) 1 partition.config.start
+                      == "s"
+                      || (
+                        builtins.substring (builtins.stringLength partition.config.end - 1) 1 partition.config.end == "s"
+                      )
+                    )
+                  then
+                    1
+                  else
+                    0;
+                defaultText = "1 if the unit of start or end is sectors, 0 otherwise";
+                description = "Alignment of the partition, if sectors are used as start or end it can be aligned to 1";
+              };
+              start = lib.mkOption {
+                type = lib.types.str;
+                default = "0";
+                description = "Start of the partition, in sgdisk format, use 0 for next available range";
+              };
+              end = lib.mkOption {
+                type = lib.types.str;
+                default = if partition.config.size == "100%" then "-0" else "+${partition.config.size}";
+                defaultText = ''
+                  if partition.config.size == "100%" then "-0" else "+''${partition.config.size}";
+                '';
+                description = ''
+                  End of the partition, in sgdisk format.
+                  Use + for relative sizes from the partitions start
+                  or - for relative sizes from the disks end
+                '';
+              };
+              content = diskoLib.partitionType {
+                parent = config;
+                device = partition.config.device;
+              };
+              hybrid = lib.mkOption {
+                type = lib.types.nullOr (
+                  lib.types.submodule (
+                    { ... }@hp:
+                    {
+                      options = {
+                        mbrPartitionType = lib.mkOption {
+                          type = lib.types.nullOr lib.types.str;
+                          default = null;
+                          description = "MBR type code";
+                        };
+                        mbrBootableFlag = lib.mkOption {
+                          type = lib.types.bool;
+                          default = false;
+                          description = "Set the bootable flag (aka the active flag) on any or all of your hybridized partitions";
+                        };
+                        _create = diskoLib.mkCreateOption {
+                          inherit config options;
+                          default = ''
+                            ${lib.optionalString (hp.config.mbrPartitionType != null) ''
+                              sfdisk --label-nested dos --part-type "${parent.device}" ${(toString partition.config._index)} ${hp.config.mbrPartitionType}
+                              udevadm trigger --subsystem-match=block
+                              udevadm settle
+                            ''}
+                            ${lib.optionalString hp.config.mbrBootableFlag ''
+                              sfdisk --label-nested dos --activate "${parent.device}" ${(toString partition.config._index)}
+                            ''}
+                          '';
+                        };
+                      };
+                    }
+                  )
+                );
+                default = null;
+                description = "Entry to add to the Hybrid MBR table";
+              };
+              _index = lib.mkOption {
+                type = lib.types.int;
+                internal = true;
+                default = diskoLib.indexOf (x: x.name == partition.config.name) sortedPartitions 0;
+                defaultText = null;
+              };
+            };
+          }
+        )
+      );
       default = { };
       description = "Attrs of partitions to add to the partition table";
     };
@@ -197,12 +244,13 @@ in
       internal = true;
       readOnly = true;
       type = lib.types.functionTo diskoLib.jsonType;
-      default = dev:
-        lib.foldr lib.recursiveUpdate { } (map
-          (partition:
-            lib.optionalAttrs (partition.content != null) (partition.content._meta dev)
+      default =
+        dev:
+        lib.foldr lib.recursiveUpdate { } (
+          map (partition: lib.optionalAttrs (partition.content != null) (partition.content._meta dev)) (
+            lib.attrValues config.partitions
           )
-          (lib.attrValues config.partitions));
+        );
       description = "Metadata";
     };
     _create = diskoLib.mkCreateOption {
@@ -211,61 +259,63 @@ in
         if ! blkid "${config.device}" >&2; then
           sgdisk --clear "${config.device}"
         fi
-        ${lib.concatMapStrings (partition:
+        ${lib.concatMapStrings (
+          partition:
           let
             args = ''
-              --partition-guid="${toString partition._index}:${if partition.uuid == null then "R" else partition.uuid}" \
+              --partition-guid="${toString partition._index}:${
+                if partition.uuid == null then "R" else partition.uuid
+              }" \
               --change-name="${toString partition._index}:${partition.label}" \
               --typecode=${toString partition._index}:${partition.type} \
               "${config.device}" \
             '';
             createArgs = ''
-              --align-end ${lib.optionalString (partition.alignment != 0) ''--set-alignment=${builtins.toString partition.alignment}''} \
+              --align-end ${
+                lib.optionalString (
+                  partition.alignment != 0
+                ) ''--set-alignment=${builtins.toString partition.alignment}''
+              } \
               --new=${toString partition._index}:${partition.start}:${partition.end} \
             '';
           in
-            ''
-              # try to create the partition, if it fails, try to change the type and name
-              if ! sgdisk ${createArgs} ${args}
-              then
-                sgdisk ${args}
-              fi
-              # ensure /dev/disk/by-path/..-partN exists before continuing
-              partprobe "${config.device}" || : # sometimes partprobe fails, but the partitions are still up2date
-              udevadm trigger --subsystem-match=block
-              udevadm settle
-            ''
+          ''
+            # try to create the partition, if it fails, try to change the type and name
+            if ! sgdisk ${createArgs} ${args}
+            then
+              sgdisk ${args}
+            fi
+            # ensure /dev/disk/by-path/..-partN exists before continuing
+            partprobe "${config.device}" || : # sometimes partprobe fails, but the partitions are still up2date
+            udevadm trigger --subsystem-match=block
+            udevadm settle
+          ''
         ) sortedPartitions}
 
-        ${
-          lib.optionalString (sortedHybridPartitions != [])
-          ("sgdisk -h "
-            + (lib.concatStringsSep ":" (map (p: (toString p._index)) sortedHybridPartitions))
-            + (
-              lib.optionalString (!config.efiGptPartitionFirst) ":EE "
-            )
-            + ''"${parent.device}"'')
-        }
-        ${lib.concatMapStrings (p:
-            p.hybrid._create
-          )
-          sortedHybridPartitions
-        }
+        ${lib.optionalString (sortedHybridPartitions != [ ]) (
+          "sgdisk -h "
+          + (lib.concatStringsSep ":" (map (p: (toString p._index)) sortedHybridPartitions))
+          + (lib.optionalString (!config.efiGptPartitionFirst) ":EE ")
+          + ''"${parent.device}"''
+        )}
+        ${lib.concatMapStrings (p: p.hybrid._create) sortedHybridPartitions}
 
-        ${lib.concatStrings (map (partition: ''
-          ${lib.optionalString (partition.content != null) partition.content._create}
-        '') sortedPartitions)}
+        ${lib.concatStrings (
+          map (partition: ''
+            ${lib.optionalString (partition.content != null) partition.content._create}
+          '') sortedPartitions
+        )}
       '';
     };
     _mount = diskoLib.mkMountOption {
       inherit config options;
       default =
         let
-          partMounts = lib.foldr lib.recursiveUpdate { } (map
-            (partition:
-              lib.optionalAttrs (partition.content != null) partition.content._mount
+          partMounts = lib.foldr lib.recursiveUpdate { } (
+            map (partition: lib.optionalAttrs (partition.content != null) partition.content._mount) (
+              lib.attrValues config.partitions
             )
-            (lib.attrValues config.partitions));
+          );
         in
         {
           dev = partMounts.dev or "";
@@ -276,11 +326,11 @@ in
       inherit config options;
       default =
         let
-          partMounts = lib.foldr lib.recursiveUpdate { } (map
-            (partition:
-              lib.optionalAttrs (partition.content != null) partition.content._unmount
+          partMounts = lib.foldr lib.recursiveUpdate { } (
+            map (partition: lib.optionalAttrs (partition.content != null) partition.content._unmount) (
+              lib.attrValues config.partitions
             )
-            (lib.attrValues config.partitions));
+          );
         in
         {
           dev = partMounts.dev or "";
@@ -290,30 +340,31 @@ in
     _config = lib.mkOption {
       internal = true;
       readOnly = true;
-      default = (map
-        (partition:
-          lib.optional (partition.content != null) partition.content._config
-        )
-        (lib.attrValues config.partitions))
-      ++ (lib.optional (lib.any (part: part.type == "EF02") (lib.attrValues config.partitions)) {
-        boot.loader.grub.devices = [ config.device ];
-      });
+      default =
+        (map (partition: lib.optional (partition.content != null) partition.content._config) (
+          lib.attrValues config.partitions
+        ))
+        ++ (lib.optional (lib.any (part: part.type == "EF02") (lib.attrValues config.partitions)) {
+          boot.loader.grub.devices = [ config.device ];
+        });
       description = "NixOS configuration";
     };
     _pkgs = lib.mkOption {
       internal = true;
       readOnly = true;
       type = lib.types.functionTo (lib.types.listOf lib.types.package);
-      default = pkgs:
+      default =
+        pkgs:
         [
           pkgs.gptfdisk
           pkgs.systemdMinimal
           pkgs.parted # for partprobe
-        ] ++ lib.flatten (map
-          (partition:
-            lib.optional (partition.content != null) (partition.content._pkgs pkgs)
+        ]
+        ++ lib.flatten (
+          map (partition: lib.optional (partition.content != null) (partition.content._pkgs pkgs)) (
+            lib.attrValues config.partitions
           )
-          (lib.attrValues config.partitions));
+        );
       description = "Packages";
     };
   };

lib/types/luks.nix

@@ -1,20 +1,30 @@
-{ config, options, lib, diskoLib, parent, device, ... }:
+{
+  config,
+  options,
+  lib,
+  diskoLib,
+  parent,
+  device,
+  ...
+}:
 let
   keyFile =
-    if config.settings ? "keyFile"
-    then config.settings.keyFile
-    else if config.askPassword
-    then ''<(set +x; echo -n "$password"; set -x)''
-    else if config.passwordFile != null
+    if config.settings ? "keyFile" then
+      config.settings.keyFile
+    else if config.askPassword then
+      ''<(set +x; echo -n "$password"; set -x)''
+    else if
+      config.passwordFile != null
     # do not print the password to the console
-    then ''<(set +x; echo -n "$(cat ${config.passwordFile})"; set -x)''
-    else if config.keyFile != null
     then
-      lib.warn
-        ("The option `keyFile` is deprecated."
-          + "Use passwordFile instead if you want to use interactive login or settings.keyFile if you want to use key file login")
-        config.keyFile
-    else null;
+      ''<(set +x; echo -n "$(cat ${config.passwordFile})"; set -x)''
+    else if config.keyFile != null then
+      lib.warn (
+        "The option `keyFile` is deprecated."
+        + "Use passwordFile instead if you want to use interactive login or settings.keyFile if you want to use key file login"
+      ) config.keyFile
+    else
+      null;
   keyFileArgs = ''
     ${lib.optionalString (keyFile != null) "--key-file ${keyFile}"} \
     ${lib.optionalString (lib.hasAttr "keyFileSize" config.settings) "--keyfile-size ${builtins.toString config.settings.keyFileSize}"} \
@@ -23,7 +33,10 @@ let
   cryptsetupOpen = ''
     cryptsetup open "${config.device}" "${config.name}" \
       ${lib.optionalString (config.settings.allowDiscards or false) "--allow-discards"} \
-      ${lib.optionalString (config.settings.bypassWorkqueues or false) "--perf-no_read_workqueue --perf-no_write_workqueue"} \
+      ${
+        lib.optionalString (config.settings.bypassWorkqueues or false
+        ) "--perf-no_read_workqueue --perf-no_write_workqueue"
+      } \
       ${toString config.extraOpenArgs} \
       ${keyFileArgs} \
   '';
@@ -58,7 +71,7 @@ in
     };
     askPassword = lib.mkOption {
       type = lib.types.bool;
-      default = config.keyFile == null && config.passwordFile == null && (! config.settings ? "keyFile");
+      default = config.keyFile == null && config.passwordFile == null && (!config.settings ? "keyFile");
       defaultText = "true if neither keyFile nor passwordFile are set";
       description = "Whether to ask for a password for initial encryption";
     };
@@ -66,13 +79,14 @@ in
       type = lib.types.attrsOf lib.types.anything;
       default = { };
       description = "LUKS settings (as defined in configuration.nix in boot.initrd.luks.devices.<name>)";
-      example = ''{
-          keyFile = "/tmp/disk.key";
-          keyFileSize = 2048;
-          keyFileOffset = 1024;
-          fallbackToPassword = true;
-          allowDiscards = true;
-        };
+      example = ''
+        {
+                  keyFile = "/tmp/disk.key";
+                  keyFileSize = 2048;
+                  keyFileOffset = 1024;
+                  fallbackToPassword = true;
+                  allowDiscards = true;
+                };
       '';
     };
     additionalKeyFiles = lib.mkOption {
@@ -98,7 +112,10 @@ in
       description = "Extra arguments to pass to `cryptsetup luksOpen` when opening";
       example = [ "--timeout 10" ];
     };
-    content = diskoLib.deviceType { parent = config; device = "/dev/mapper/${config.name}"; };
+    content = diskoLib.deviceType {
+      parent = config;
+      device = "/dev/mapper/${config.name}";
+    };
     _parent = lib.mkOption {
       internal = true;
       default = parent;
@@ -107,8 +124,7 @@ in
       internal = true;
       readOnly = true;
       type = lib.types.functionTo diskoLib.jsonType;
-      default = dev:
-        lib.optionalAttrs (config.content != null) (config.content._meta dev);
+      default = dev: lib.optionalAttrs (config.content != null) (config.content._meta dev);
       description = "Metadata";
     };
     _create = diskoLib.mkCreateOption {
@@ -136,9 +152,11 @@ in
           ''}
           cryptsetup -q luksFormat "${config.device}" ${toString config.extraFormatArgs} ${keyFileArgs}
           ${cryptsetupOpen} --persistent
-          ${toString (lib.forEach config.additionalKeyFiles (keyFile: ''
-            cryptsetup luksAddKey "${config.device}" ${keyFile} ${keyFileArgs}
-          ''))}
+          ${toString (
+            lib.forEach config.additionalKeyFiles (keyFile: ''
+              cryptsetup luksAddKey "${config.device}" ${keyFile} ${keyFileArgs}
+            '')
+          )}
         fi
         ${lib.optionalString (config.content != null) config.content._create}
       '';
@@ -176,34 +194,42 @@ in
         let
           contentUnmount = config.content._unmount;
         in
-          {
-            dev = ''
-              ${lib.optionalString (config.content != null) contentUnmount.dev or ""}
-              if cryptsetup status "${config.name}" >/dev/null 2>/dev/null; then
-                cryptsetup close "${config.name}"
-              fi
-            '';
-          };
+        {
+          dev = ''
+            ${lib.optionalString (config.content != null) contentUnmount.dev or ""}
+            if cryptsetup status "${config.name}" >/dev/null 2>/dev/null; then
+              cryptsetup close "${config.name}"
+            fi
+          '';
+        };
     };
     _config = lib.mkOption {
       internal = true;
       readOnly = true;
-      default = [ ]
+      default =
+        [ ]
         # If initrdUnlock is true, then add a device entry to the initrd.luks.devices config.
         ++ (lib.optional config.initrdUnlock [
-        {
-          boot.initrd.luks.devices.${config.name} = {
-            inherit (config) device;
-          } // config.settings;
-        }
-      ]) ++ (lib.optional (config.content != null) config.content._config);
+          {
+            boot.initrd.luks.devices.${config.name} = {
+              inherit (config) device;
+            } // config.settings;
+          }
+        ])
+        ++ (lib.optional (config.content != null) config.content._config);
       description = "NixOS configuration";
     };
     _pkgs = lib.mkOption {
       internal = true;
       readOnly = true;
       type = lib.types.functionTo (lib.types.listOf lib.types.package);
-      default = pkgs: [ pkgs.gnugrep pkgs.cryptsetup ] ++ (lib.optionals (config.content != null) (config.content._pkgs pkgs));
+      default =
+        pkgs:
+        [
+          pkgs.gnugrep
+          pkgs.cryptsetup
+        ]
+        ++ (lib.optionals (config.content != null) (config.content._pkgs pkgs));
       description = "Packages";
     };
   };

lib/types/lvm_pv.nix

@@ -1,4 +1,12 @@
-{ config, options, lib, diskoLib, parent, device, ... }:
+{
+  config,
+  options,
+  lib,
+  diskoLib,
+  parent,
+  device,
+  ...
+}:
 {
   options = {
     type = lib.mkOption {
@@ -55,7 +63,10 @@
       internal = true;
       readOnly = true;
       type = lib.types.functionTo (lib.types.listOf lib.types.package);
-      default = pkgs: [ pkgs.gnugrep pkgs.lvm2 ];
+      default = pkgs: [
+        pkgs.gnugrep
+        pkgs.lvm2
+      ];
       description = "Packages";
     };
   };

lib/types/lvm_vg.nix

@@ -1,14 +1,22 @@
-{ config, options, lib, diskoLib, ... }:
+{
+  config,
+  options,
+  lib,
+  diskoLib,
+  ...
+}:
 let
   # Load kernel modules to ensure device mapper types are available
   kernelModules =
     [
       # Prevent unbootable systems if LVM snapshots are present at boot time.
       "dm-snapshot"
-    ] ++
-    lib.filter (x: x != "") (map
-      (lv: lib.optionalString (lv.lvm_type != null && lv.lvm_type != "thinlv") "dm-${lv.lvm_type}")
-      (lib.attrValues config.lvs));
+    ]
+    ++ lib.filter (x: x != "") (
+      map (lv: lib.optionalString (lv.lvm_type != null && lv.lvm_type != "thinlv") "dm-${lv.lvm_type}") (
+        lib.attrValues config.lvs
+      )
+    );
 in
 {
   options = {
@@ -23,44 +31,65 @@ in
       description = "Type";
     };
     lvs = lib.mkOption {
-      type = lib.types.attrsOf (lib.types.submodule ({ name, ... }@lv: {
-        options = {
-          name = lib.mkOption {
-            type = lib.types.str;
-            default = name;
-            description = "Name of the logical volume";
-          };
-          priority = lib.mkOption {
-            type = lib.types.int;
-            default = (if lv.config.lvm_type == "thin-pool" then 501 else 1000) + (if lib.hasInfix "100%" lv.config.size then 251 else 0);
-            defaultText = lib.literalExpression ''
-              if (lib.hasInfix "100%" lv.config.size) then 9001 else 1000
-            '';
-            description = "Priority of the logical volume, smaller values are created first";
-          };
-          size = lib.mkOption {
-            type = lib.types.str; # TODO lvm size type
-            description = "Size of the logical volume";
-          };
-          lvm_type = lib.mkOption {
-            # TODO: add raid10
-            type = lib.types.nullOr (lib.types.enum [ "mirror" "raid0" "raid1" "raid4" "raid5" "raid6" "thin-pool" "thinlv" ]); # TODO add all lib.types
-            default = null; # maybe there is always a default type?
-            description = "LVM type";
-          };
-          extraArgs = lib.mkOption {
-            type = lib.types.listOf lib.types.str;
-            default = [ ];
-            description = "Extra arguments";
-          };
-          pool = lib.mkOption {
-            type = lib.types.nullOr lib.types.str;
-            default = null;
-            description = "Name of pool LV that this LV belongs to";
-          };
-          content = diskoLib.partitionType { parent = config; device = "/dev/${config.name}/${lv.config.name}"; };
-        };
-      }));
+      type = lib.types.attrsOf (
+        lib.types.submodule (
+          { name, ... }@lv:
+          {
+            options = {
+              name = lib.mkOption {
+                type = lib.types.str;
+                default = name;
+                description = "Name of the logical volume";
+              };
+              priority = lib.mkOption {
+                type = lib.types.int;
+                default =
+                  (if lv.config.lvm_type == "thin-pool" then 501 else 1000)
+                  + (if lib.hasInfix "100%" lv.config.size then 251 else 0);
+                defaultText = lib.literalExpression ''
+                  if (lib.hasInfix "100%" lv.config.size) then 9001 else 1000
+                '';
+                description = "Priority of the logical volume, smaller values are created first";
+              };
+              size = lib.mkOption {
+                type = lib.types.str; # TODO lvm size type
+                description = "Size of the logical volume";
+              };
+              lvm_type = lib.mkOption {
+                # TODO: add raid10
+                type = lib.types.nullOr (
+                  lib.types.enum [
+                    "mirror"
+                    "raid0"
+                    "raid1"
+                    "raid4"
+                    "raid5"
+                    "raid6"
+                    "thin-pool"
+                    "thinlv"
+                  ]
+                ); # TODO add all lib.types
+                default = null; # maybe there is always a default type?
+                description = "LVM type";
+              };
+              extraArgs = lib.mkOption {
+                type = lib.types.listOf lib.types.str;
+                default = [ ];
+                description = "Extra arguments";
+              };
+              pool = lib.mkOption {
+                type = lib.types.nullOr lib.types.str;
+                default = null;
+                description = "Name of pool LV that this LV belongs to";
+              };
+              content = diskoLib.partitionType {
+                parent = config;
+                device = "/dev/${config.name}/${lv.config.name}";
+              };
+            };
+          }
+        )
+      );
       default = { };
       description = "LVS for the volume group";
     };
@@ -68,12 +97,15 @@ in
       internal = true;
       readOnly = true;
       type = diskoLib.jsonType;
-      default =
-        diskoLib.deepMergeMap
-          (lv:
-            lib.optionalAttrs (lv.content != null) (lv.content._meta [ "lvm_vg" config.name ])
-          )
-          (lib.attrValues config.lvs);
+      default = diskoLib.deepMergeMap (
+        lv:
+        lib.optionalAttrs (lv.content != null) (
+          lv.content._meta [
+            "lvm_vg"
+            config.name
+          ]
+        )
+      ) (lib.attrValues config.lvs);
       description = "Metadata";
     };
     _create = diskoLib.mkCreateOption {
@@ -93,8 +125,14 @@ in
             if ! lvdisplay "${config.name}/${lv.name}"; then
               lvcreate \
                 --yes \
-                ${if (lv.lvm_type == "thinlv") then "-V"
-                  else if lib.hasInfix "%" lv.size then "-l" else "-L"} \
+                ${
+                  if (lv.lvm_type == "thinlv") then
+                    "-V"
+                  else if lib.hasInfix "%" lv.size then
+                    "-l"
+                  else
+                    "-L"
+                } \
                   ${if lib.hasSuffix "%" lv.size then "${lv.size}FREE" else lv.size} \
                 -n "${lv.name}" \
                 ${lib.optionalString (lv.lvm_type == "thinlv") "--thinpool=${lv.pool}"} \
@@ -113,11 +151,9 @@ in
       inherit config options;
       default =
         let
-          lvMounts = diskoLib.deepMergeMap
-            (lv:
-              lib.optionalAttrs (lv.content != null) lv.content._mount
-            )
-            (lib.attrValues config.lvs);
+          lvMounts = diskoLib.deepMergeMap (lv: lib.optionalAttrs (lv.content != null) lv.content._mount) (
+            lib.attrValues config.lvs
+          );
         in
         {
           dev = ''
@@ -131,12 +167,11 @@ in
       inherit config options;
       default =
         let
-          lvMounts = diskoLib.deepMergeMap
-            (lv:
-              lib.optionalAttrs (lv.content != null) lv.content._unmount
-            )
-            (lib.attrValues config.lvs);
-        in {
+          lvMounts = diskoLib.deepMergeMap (lv: lib.optionalAttrs (lv.content != null) lv.content._unmount) (
+            lib.attrValues config.lvs
+          );
+        in
+        {
           dev = ''
             ${lib.concatMapStrings (x: x.dev or "") (lib.attrValues lvMounts)}
             vgchange -a n
@@ -147,36 +182,35 @@ in
     _config = lib.mkOption {
       internal = true;
       readOnly = true;
-      default = [{ boot.initrd.kernelModules = kernelModules; }] ++
-        map
-          (lv: [
-            (lib.optional (lv.content != null) lv.content._config)
-            (lib.optional (lv.lvm_type != null) {
-              boot.initrd.kernelModules = [
+      default =
+        [ { boot.initrd.kernelModules = kernelModules; } ]
+        ++ map (lv: [
+          (lib.optional (lv.content != null) lv.content._config)
+          (lib.optional (lv.lvm_type != null) {
+            boot.initrd.kernelModules =
+              [
                 (if lv.lvm_type == "mirror" then "dm-mirror" else "dm-raid")
               ]
               ++ lib.optional (lv.lvm_type == "raid0") "raid0"
               ++ lib.optional (lv.lvm_type == "raid1") "raid1"
               # ++ lib.optional (lv.lvm_type == "raid10") "raid10"
-              ++ lib.optional
-                (lv.lvm_type == "raid4" ||
-                  lv.lvm_type == "raid5" ||
-                  lv.lvm_type == "raid6") "raid456";
+              ++ lib.optional (
+                lv.lvm_type == "raid4" || lv.lvm_type == "raid5" || lv.lvm_type == "raid6"
+              ) "raid456";
 
-            })
-          ])
-          (lib.attrValues config.lvs);
+          })
+        ]) (lib.attrValues config.lvs);
       description = "NixOS configuration";
     };
     _pkgs = lib.mkOption {
       internal = true;
       readOnly = true;
       type = lib.types.functionTo (lib.types.listOf lib.types.package);
-      default = pkgs: lib.flatten (map
-        (lv:
-          lib.optional (lv.content != null) (lv.content._pkgs pkgs)
-        )
-        (lib.attrValues config.lvs));
+      default =
+        pkgs:
+        lib.flatten (
+          map (lv: lib.optional (lv.content != null) (lv.content._pkgs pkgs)) (lib.attrValues config.lvs)
+        );
       description = "Packages";
     };
   };

lib/types/mdadm.nix

@@ -1,4 +1,10 @@
-{ config, options, lib, diskoLib, ... }:
+{
+  config,
+  options,
+  lib,
+  diskoLib,
+  ...
+}:
 {
   options = {
     name = lib.mkOption {
@@ -18,17 +24,32 @@
       description = "mdadm level";
     };
     metadata = lib.mkOption {
-      type = lib.types.enum [ "1" "1.0" "1.1" "1.2" "default" "ddf" "imsm" ];
+      type = lib.types.enum [
+        "1"
+        "1.0"
+        "1.1"
+        "1.2"
+        "default"
+        "ddf"
+        "imsm"
+      ];
       default = "default";
       description = "Metadata";
     };
-    content = diskoLib.deviceType { parent = config; device = "/dev/md/${config.name}"; };
+    content = diskoLib.deviceType {
+      parent = config;
+      device = "/dev/md/${config.name}";
+    };
     _meta = lib.mkOption {
       internal = true;
       readOnly = true;
       type = diskoLib.jsonType;
-      default =
-        lib.optionalAttrs (config.content != null) (config.content._meta [ "mdadm" config.name ]);
+      default = lib.optionalAttrs (config.content != null) (
+        config.content._meta [
+          "mdadm"
+          config.name
+        ]
+      );
       description = "Metadata";
     };
     _create = diskoLib.mkCreateOption {
@@ -54,45 +75,52 @@
     };
     _mount = diskoLib.mkMountOption {
       inherit config options;
-      default =
-        lib.optionalAttrs (config.content != null) config.content._mount;
+      default = lib.optionalAttrs (config.content != null) config.content._mount;
       # TODO we probably need to assemble the mdadm somehow
     };
     _unmount = diskoLib.mkUnmountOption {
       inherit config options;
-      default = let
-        content = lib.optionalAttrs (config.content != null) config.content._unmount;
-      in {
-        fs = content.fs;
-        dev = ''
-          ${content.dev or ""}
-          if [ -e "/dev/md/${config.name}" ]; then
-            mdadm --stop "/dev/md/${config.name}"
-          fi
-        '';
-      };
+      default =
+        let
+          content = lib.optionalAttrs (config.content != null) config.content._unmount;
+        in
+        {
+          fs = content.fs;
+          dev = ''
+            ${content.dev or ""}
+            if [ -e "/dev/md/${config.name}" ]; then
+              mdadm --stop "/dev/md/${config.name}"
+            fi
+          '';
+        };
     };
     _config = lib.mkOption {
       internal = true;
       readOnly = true;
-      default =
-        [
-          (if lib.versionAtLeast (lib.versions.majorMinor lib.version) "23.11" then {
-            boot.swraid.enable = true;
-          } else {
-            boot.initrd.services.swraid.enable = true;
-          })
-        ] ++
-        lib.optional (config.content != null) config.content._config;
+      default = [
+        (
+          if lib.versionAtLeast (lib.versions.majorMinor lib.version) "23.11" then
+            {
+              boot.swraid.enable = true;
+            }
+          else
+            {
+              boot.initrd.services.swraid.enable = true;
+            }
+        )
+      ] ++ lib.optional (config.content != null) config.content._config;
       description = "NixOS configuration";
     };
     _pkgs = lib.mkOption {
       internal = true;
       readOnly = true;
       type = lib.types.functionTo (lib.types.listOf lib.types.package);
-      default = pkgs: [
-        pkgs.parted # for partprobe
-      ] ++ (lib.optionals (config.content != null) (config.content._pkgs pkgs));
+      default =
+        pkgs:
+        [
+          pkgs.parted # for partprobe
+        ]
+        ++ (lib.optionals (config.content != null) (config.content._pkgs pkgs));
       description = "Packages";
     };
   };

lib/types/mdraid.nix

@@ -1,4 +1,12 @@
-{ config, options, lib, diskoLib, parent, device, ... }:
+{
+  config,
+  options,
+  lib,
+  diskoLib,
+  parent,
+  device,
+  ...
+}:
 {
   options = {
     type = lib.mkOption {

lib/types/nodev.nix

@@ -1,4 +1,11 @@
-{ lib, config, options, diskoLib, rootMountPoint, ... }:
+{
+  lib,
+  config,
+  options,
+  diskoLib,
+  rootMountPoint,
+  ...
+}:
 {
   options = {
     type = lib.mkOption {

lib/types/swap.nix

@@ -1,4 +1,12 @@
-{ diskoLib, config, options, lib, parent, device, ... }:
+{
+  diskoLib,
+  config,
+  options,
+  lib,
+  parent,
+  device,
+  ...
+}:
 {
   options = {
     type = lib.mkOption {
@@ -14,7 +22,13 @@
     discardPolicy = lib.mkOption {
       default = null;
       example = "once";
-      type = lib.types.nullOr (lib.types.enum [ "once" "pages" "both" ]);
+      type = lib.types.nullOr (
+        lib.types.enum [
+          "once"
+          "pages"
+          "both"
+        ]
+      );
       description = ''
         Specify the discard policy for the swap device. If "once", then the
         whole swap space is discarded at swapon invocation. If "pages",
@@ -83,12 +97,8 @@
           if test "''${DISKO_SKIP_SWAP:-}" != 1 && ! swapon --show | grep -q "^$(readlink -f "${config.device}") "; then
             swapon ${
               lib.optionalString (config.discardPolicy != null)
-                "--discard${lib.optionalString (config.discardPolicy != "both")
-                "=${config.discardPolicy}"
-              }"} ${
-              lib.optionalString (config.priority != null)
-                "--priority=${toString config.priority}"
-              } \
+                "--discard${lib.optionalString (config.discardPolicy != "both") "=${config.discardPolicy}"}"
+            } ${lib.optionalString (config.priority != null) "--priority=${toString config.priority}"} \
               --options=${lib.concatStringsSep "," config.mountOptions} \
               "${config.device}"
           fi
@@ -108,26 +118,33 @@
     _config = lib.mkOption {
       internal = true;
       readOnly = true;
-      default = [{
-        swapDevices = [{
-          device = config.device;
-          inherit (config) discardPolicy priority;
-          randomEncryption = {
-            enable = config.randomEncryption;
-            # forward discard/TRIM attempts through dm-crypt
-            allowDiscards = config.discardPolicy != null;
-          };
-          options = config.mountOptions;
-        }];
-        boot.resumeDevice = lib.mkIf config.resumeDevice config.device;
-      }];
+      default = [
+        {
+          swapDevices = [
+            {
+              device = config.device;
+              inherit (config) discardPolicy priority;
+              randomEncryption = {
+                enable = config.randomEncryption;
+                # forward discard/TRIM attempts through dm-crypt
+                allowDiscards = config.discardPolicy != null;
+              };
+              options = config.mountOptions;
+            }
+          ];
+          boot.resumeDevice = lib.mkIf config.resumeDevice config.device;
+        }
+      ];
       description = "NixOS configuration";
     };
     _pkgs = lib.mkOption {
       internal = true;
       readOnly = true;
       type = lib.types.functionTo (lib.types.listOf lib.types.package);
-      default = pkgs: [ pkgs.gnugrep pkgs.util-linux ];
+      default = pkgs: [
+        pkgs.gnugrep
+        pkgs.util-linux
+      ];
       description = "Packages";
     };
   };

lib/types/table.nix

@@ -1,179 +1,227 @@
-{ config, options, lib, diskoLib, parent, device, ... }:
 {
-  options = lib.warn ''
-    The legacy table is outdated and should not be used. We recommend using the gpt type instead.
-    Please note that certain features, such as the test framework, may not function properly with the legacy table type.
-    If you encounter errors similar to:
-    "error: The option `disko.devices.disk.disk1.content.partitions."[definition 1-entry 1]".content._config` is read-only, but it's set multiple times,"
-    this is likely due to the use of the legacy table type.
-    for a migration you can follow the guide at https://github.com/nix-community/disko/blob/master/docs/table-to-gpt.md
-  ''
-    {
-      type = lib.mkOption {
-        type = lib.types.enum [ "table" ];
-        internal = true;
-        description = "Partition table";
-      };
-      device = lib.mkOption {
-        type = lib.types.str;
-        default = device;
-        description = "Device to partition";
-      };
-      format = lib.mkOption {
-        type = lib.types.enum [ "gpt" "msdos" ];
-        default = "gpt";
-        description = "The kind of partition table";
-      };
-      partitions = lib.mkOption {
-        type = lib.types.listOf (lib.types.submodule ({ name, ... }@partition: {
-          options = {
-            part-type = lib.mkOption {
-              type = lib.types.enum [ "primary" "logical" "extended" ];
-              default = "primary";
-              description = "Partition type";
-            };
-            fs-type = lib.mkOption {
-              type = lib.types.nullOr (lib.types.enum [ "btrfs" "ext2" "ext3" "ext4" "fat16" "fat32" "hfs" "hfs+" "linux-swap" "ntfs" "reiserfs" "udf" "xfs" ]);
-              default = null;
-              description = "Filesystem type to use";
-            };
-            name = lib.mkOption {
-              type = lib.types.nullOr lib.types.str;
-              description = "Name of the partition";
-            };
-            start = lib.mkOption {
-              type = lib.types.str;
-              default = "0%";
-              description = "Start of the partition";
-            };
-            end = lib.mkOption {
-              type = lib.types.str;
-              default = "100%";
-              description = "End of the partition";
-            };
-            flags = lib.mkOption {
-              type = lib.types.listOf lib.types.str;
-              default = [ ];
-              description = "Partition flags";
-            };
-            bootable = lib.mkOption {
-              type = lib.types.bool;
-              default = false;
-              description = "Whether to make the partition bootable";
-            };
-            content = diskoLib.partitionType { parent = config; device = diskoLib.deviceNumbering config.device partition.config._index; };
-            _index = lib.mkOption {
-              type = lib.types.int;
-              internal = true;
-              default = lib.toInt (lib.head (builtins.match ".*entry ([[:digit:]]+)]" name));
-              defaultText = null;
-            };
-          };
-        }));
-        default = [ ];
-        description = "List of partitions to add to the partition table";
-      };
-      _parent = lib.mkOption {
-        internal = true;
-        default = parent;
-      };
-      _meta = lib.mkOption {
-        internal = true;
-        readOnly = true;
-        type = lib.types.functionTo diskoLib.jsonType;
-        default = dev:
-          lib.foldr lib.recursiveUpdate { } (lib.imap
-            (_index: partition:
-              lib.optionalAttrs (partition.content != null) (partition.content._meta dev)
+  config,
+  options,
+  lib,
+  diskoLib,
+  parent,
+  device,
+  ...
+}:
+{
+  options =
+    lib.warn
+      ''
+        The legacy table is outdated and should not be used. We recommend using the gpt type instead.
+        Please note that certain features, such as the test framework, may not function properly with the legacy table type.
+        If you encounter errors similar to:
+        "error: The option `disko.devices.disk.disk1.content.partitions."[definition 1-entry 1]".content._config` is read-only, but it's set multiple times,"
+        this is likely due to the use of the legacy table type.
+        for a migration you can follow the guide at https://github.com/nix-community/disko/blob/master/docs/table-to-gpt.md
+      ''
+      {
+        type = lib.mkOption {
+          type = lib.types.enum [ "table" ];
+          internal = true;
+          description = "Partition table";
+        };
+        device = lib.mkOption {
+          type = lib.types.str;
+          default = device;
+          description = "Device to partition";
+        };
+        format = lib.mkOption {
+          type = lib.types.enum [
+            "gpt"
+            "msdos"
+          ];
+          default = "gpt";
+          description = "The kind of partition table";
+        };
+        partitions = lib.mkOption {
+          type = lib.types.listOf (
+            lib.types.submodule (
+              { name, ... }@partition:
+              {
+                options = {
+                  part-type = lib.mkOption {
+                    type = lib.types.enum [
+                      "primary"
+                      "logical"
+                      "extended"
+                    ];
+                    default = "primary";
+                    description = "Partition type";
+                  };
+                  fs-type = lib.mkOption {
+                    type = lib.types.nullOr (
+                      lib.types.enum [
+                        "btrfs"
+                        "ext2"
+                        "ext3"
+                        "ext4"
+                        "fat16"
+                        "fat32"
+                        "hfs"
+                        "hfs+"
+                        "linux-swap"
+                        "ntfs"
+                        "reiserfs"
+                        "udf"
+                        "xfs"
+                      ]
+                    );
+                    default = null;
+                    description = "Filesystem type to use";
+                  };
+                  name = lib.mkOption {
+                    type = lib.types.nullOr lib.types.str;
+                    description = "Name of the partition";
+                  };
+                  start = lib.mkOption {
+                    type = lib.types.str;
+                    default = "0%";
+                    description = "Start of the partition";
+                  };
+                  end = lib.mkOption {
+                    type = lib.types.str;
+                    default = "100%";
+                    description = "End of the partition";
+                  };
+                  flags = lib.mkOption {
+                    type = lib.types.listOf lib.types.str;
+                    default = [ ];
+                    description = "Partition flags";
+                  };
+                  bootable = lib.mkOption {
+                    type = lib.types.bool;
+                    default = false;
+                    description = "Whether to make the partition bootable";
+                  };
+                  content = diskoLib.partitionType {
+                    parent = config;
+                    device = diskoLib.deviceNumbering config.device partition.config._index;
+                  };
+                  _index = lib.mkOption {
+                    type = lib.types.int;
+                    internal = true;
+                    default = lib.toInt (lib.head (builtins.match ".*entry ([[:digit:]]+)]" name));
+                    defaultText = null;
+                  };
+                };
+              }
             )
-            config.partitions);
-        description = "Metadata";
+          );
+          default = [ ];
+          description = "List of partitions to add to the partition table";
+        };
+        _parent = lib.mkOption {
+          internal = true;
+          default = parent;
+        };
+        _meta = lib.mkOption {
+          internal = true;
+          readOnly = true;
+          type = lib.types.functionTo diskoLib.jsonType;
+          default =
+            dev:
+            lib.foldr lib.recursiveUpdate { } (
+              lib.imap (
+                _index: partition: lib.optionalAttrs (partition.content != null) (partition.content._meta dev)
+              ) config.partitions
+            );
+          description = "Metadata";
+        };
+        _create = diskoLib.mkCreateOption {
+          inherit config options;
+          default = ''
+            if ! blkid "${config.device}" >/dev/null; then
+              parted -s "${config.device}" -- mklabel ${config.format}
+              ${lib.concatStrings (
+                map (partition: ''
+                  ${lib.optionalString (config.format == "gpt") ''
+                    parted -s "${config.device}" -- mkpart "${diskoLib.hexEscapeUdevSymlink partition.name}" ${diskoLib.maybeStr partition.fs-type} ${partition.start} ${partition.end}
+                  ''}
+                  ${lib.optionalString (config.format == "msdos") ''
+                    parted -s "${config.device}" -- mkpart ${partition.part-type} ${diskoLib.maybeStr partition.fs-type} ${partition.start} ${partition.end}
+                  ''}
+                  # ensure /dev/disk/by-path/..-partN exists before continuing
+                  partprobe "${config.device}"
+                  udevadm trigger --subsystem-match=block
+                  udevadm settle
+                  ${lib.optionalString partition.bootable ''
+                    parted -s "${config.device}" -- set ${toString partition._index} boot on
+                  ''}
+                  ${lib.concatMapStringsSep "" (flag: ''
+                    parted -s "${config.device}" -- set ${toString partition._index} ${flag} on
+                  '') partition.flags}
+                  # ensure further operations can detect new partitions
+                  partprobe "${config.device}"
+                  udevadm trigger --subsystem-match=block
+                  udevadm settle
+                '') config.partitions
+              )}
+            fi
+            ${lib.concatStrings (
+              map (partition: ''
+                ${lib.optionalString (partition.content != null) partition.content._create}
+              '') config.partitions
+            )}
+          '';
+        };
+        _mount = diskoLib.mkMountOption {
+          inherit config options;
+          default =
+            let
+              partMounts = lib.foldr lib.recursiveUpdate { } (
+                map (
+                  partition: lib.optionalAttrs (partition.content != null) partition.content._mount
+                ) config.partitions
+              );
+            in
+            {
+              dev = partMounts.dev or "";
+              fs = partMounts.fs or { };
+            };
+        };
+        _unmount = diskoLib.mkUnmountOption {
+          inherit config options;
+          default =
+            let
+              partMounts = lib.foldr lib.recursiveUpdate { } (
+                map (
+                  partition: lib.optionalAttrs (partition.content != null) partition.content._unmount
+                ) config.partitions
+              );
+            in
+            {
+              dev = partMounts.dev or "";
+              fs = partMounts.fs or { };
+            };
+        };
+        _config = lib.mkOption {
+          internal = true;
+          readOnly = true;
+          default = map (
+            partition: lib.optional (partition.content != null) partition.content._config
+          ) config.partitions;
+          description = "NixOS configuration";
+        };
+        _pkgs = lib.mkOption {
+          internal = true;
+          readOnly = true;
+          type = lib.types.functionTo (lib.types.listOf lib.types.package);
+          default =
+            pkgs:
+            [
+              pkgs.parted
+              pkgs.systemdMinimal
+            ]
+            ++ lib.flatten (
+              map (
+                partition: lib.optional (partition.content != null) (partition.content._pkgs pkgs)
+              ) config.partitions
+            );
+          description = "Packages";
+        };
       };
-      _create = diskoLib.mkCreateOption {
-        inherit config options;
-        default = ''
-          if ! blkid "${config.device}" >/dev/null; then
-            parted -s "${config.device}" -- mklabel ${config.format}
-            ${lib.concatStrings (map (partition: ''
-              ${lib.optionalString (config.format == "gpt") ''
-                parted -s "${config.device}" -- mkpart "${diskoLib.hexEscapeUdevSymlink partition.name}" ${diskoLib.maybeStr partition.fs-type} ${partition.start} ${partition.end}
-              ''}
-              ${lib.optionalString (config.format == "msdos") ''
-                parted -s "${config.device}" -- mkpart ${partition.part-type} ${diskoLib.maybeStr partition.fs-type} ${partition.start} ${partition.end}
-              ''}
-              # ensure /dev/disk/by-path/..-partN exists before continuing
-              partprobe "${config.device}"
-              udevadm trigger --subsystem-match=block
-              udevadm settle
-              ${lib.optionalString partition.bootable ''
-                parted -s "${config.device}" -- set ${toString partition._index} boot on
-              ''}
-              ${lib.concatMapStringsSep "" (flag: ''
-                parted -s "${config.device}" -- set ${toString partition._index} ${flag} on
-              '') partition.flags}
-              # ensure further operations can detect new partitions
-              partprobe "${config.device}"
-              udevadm trigger --subsystem-match=block
-              udevadm settle
-            '') config.partitions)}
-          fi
-          ${lib.concatStrings (map (partition: ''
-            ${lib.optionalString (partition.content != null) partition.content._create}
-          '') config.partitions)}
-        '';
-      };
-      _mount = diskoLib.mkMountOption {
-        inherit config options;
-        default =
-          let
-            partMounts = lib.foldr lib.recursiveUpdate { } (map
-              (partition:
-                lib.optionalAttrs (partition.content != null) partition.content._mount
-              )
-              config.partitions);
-          in
-          {
-            dev = partMounts.dev or "";
-            fs = partMounts.fs or { };
-          };
-      };
-      _unmount = diskoLib.mkUnmountOption {
-        inherit config options;
-        default =
-          let
-            partMounts = lib.foldr lib.recursiveUpdate { } (map
-              (partition:
-                lib.optionalAttrs (partition.content != null) partition.content._unmount
-              )
-              config.partitions);
-          in
-          {
-            dev = partMounts.dev or "";
-            fs = partMounts.fs or { };
-          };
-      };
-      _config = lib.mkOption {
-        internal = true;
-        readOnly = true;
-        default =
-          map
-            (partition:
-              lib.optional (partition.content != null) partition.content._config
-            )
-            config.partitions;
-        description = "NixOS configuration";
-      };
-      _pkgs = lib.mkOption {
-        internal = true;
-        readOnly = true;
-        type = lib.types.functionTo (lib.types.listOf lib.types.package);
-        default = pkgs:
-          [ pkgs.parted pkgs.systemdMinimal ] ++ lib.flatten (map
-            (partition:
-              lib.optional (partition.content != null) (partition.content._pkgs pkgs)
-            )
-            config.partitions);
-        description = "Packages";
-      };
-    };
 }

lib/types/zfs.nix

@@ -1,4 +1,12 @@
-{ config, options, lib, diskoLib, parent, device, ... }:
+{
+  config,
+  options,
+  lib,
+  diskoLib,
+  parent,
+  device,
+  ...
+}:
 {
   options = {
     type = lib.mkOption {

lib/types/zfs_fs.nix

@@ -1,4 +1,12 @@
-{ config, options, lib, diskoLib, rootMountPoint, parent, ... }:
+{
+  config,
+  options,
+  lib,
+  diskoLib,
+  rootMountPoint,
+  parent,
+  ...
+}:
 {
   options = {
     name = lib.mkOption {
@@ -58,45 +66,53 @@
       default = true;
     };
 
-    _create = diskoLib.mkCreateOption
-      {
-        inherit config options;
-        # -u prevents mounting newly created datasets, which is
-        # important to prevent accidental shadowing of mount points
-        # since (create order != mount order)
-        # -p creates parents automatically
-        default =
-          let
-            createOptions = (lib.optionalAttrs (config.mountpoint != null) { mountpoint = config.mountpoint; }) // config.options;
-            # All options defined as PROP_ONETIME or PROP_ONETIME_DEFAULT in https://github.com/openzfs/zfs/blob/master/module/zcommon/zfs_prop.c
-            onetimeProperties = [
-              "encryption"
-              "casesensitivity"
-              "utf8only"
-              "normalization"
-              "volblocksize"
-              "pbkdf2iters"
-              "pbkdf2salt"
-              "keyformat"
-            ];
-            updateOptions = builtins.removeAttrs createOptions onetimeProperties;
-          in
-          ''
-            if ! zfs get type ${config._name} >/dev/null 2>&1; then
-              ${if config._createFilesystem then ''
-                zfs create -up ${config._name} \
-                  ${lib.concatStringsSep " " (lib.mapAttrsToList (n: v: "-o ${n}=${v}") (createOptions))}
-              '' else ''
-                # don't create anything for root dataset of zpools
-                true
-              ''}
-            ${lib.optionalString (updateOptions != {}) ''
+    _create = diskoLib.mkCreateOption {
+      inherit config options;
+      # -u prevents mounting newly created datasets, which is
+      # important to prevent accidental shadowing of mount points
+      # since (create order != mount order)
+      # -p creates parents automatically
+      default =
+        let
+          createOptions =
+            (lib.optionalAttrs (config.mountpoint != null) { mountpoint = config.mountpoint; })
+            // config.options;
+          # All options defined as PROP_ONETIME or PROP_ONETIME_DEFAULT in https://github.com/openzfs/zfs/blob/master/module/zcommon/zfs_prop.c
+          onetimeProperties = [
+            "encryption"
+            "casesensitivity"
+            "utf8only"
+            "normalization"
+            "volblocksize"
+            "pbkdf2iters"
+            "pbkdf2salt"
+            "keyformat"
+          ];
+          updateOptions = builtins.removeAttrs createOptions onetimeProperties;
+        in
+        ''
+          if ! zfs get type ${config._name} >/dev/null 2>&1; then
+            ${
+              if config._createFilesystem then
+                ''
+                  zfs create -up ${config._name} \
+                    ${lib.concatStringsSep " " (lib.mapAttrsToList (n: v: "-o ${n}=${v}") (createOptions))}
+                ''
+              else
+                ''
+                  # don't create anything for root dataset of zpools
+                  true
+                ''
+            }
+          ${lib.optionalString (updateOptions != { }) ''
             else
-              zfs set -u ${lib.concatStringsSep " " (lib.mapAttrsToList (n: v: "${n}=${v}") updateOptions)} ${config._name}
-            ''}
-            fi
-          '';
-      };
+              zfs set -u ${
+                lib.concatStringsSep " " (lib.mapAttrsToList (n: v: "${n}=${v}") updateOptions)
+              } ${config._name}
+          ''}
+          fi
+        '';
+    };
 
     _mount = diskoLib.mkMountOption {
       inherit config options;
@@ -107,17 +123,20 @@
               zfs load-key ${config._name}
             fi
           '';
-        }) // lib.optionalAttrs (config.options.mountpoint or "" != "none" && config.options.canmount or "" != "off") {
-          fs.${config.mountpoint} = ''
-            if ! findmnt ${config._name} "${rootMountPoint}${config.mountpoint}" >/dev/null 2>&1; then
-              mount ${config._name} "${rootMountPoint}${config.mountpoint}" \
-                -o X-mount.mkdir \
-                ${lib.concatMapStringsSep " " (opt: "-o ${opt}") config.mountOptions} \
-                ${lib.optionalString ((config.options.mountpoint or "") != "legacy") "-o zfsutil"} \
-                -t zfs
-            fi
-          '';
-        };
+        })
+        // lib.optionalAttrs
+          (config.options.mountpoint or "" != "none" && config.options.canmount or "" != "off")
+          {
+            fs.${config.mountpoint} = ''
+              if ! findmnt ${config._name} "${rootMountPoint}${config.mountpoint}" >/dev/null 2>&1; then
+                mount ${config._name} "${rootMountPoint}${config.mountpoint}" \
+                  -o X-mount.mkdir \
+                  ${lib.concatMapStringsSep " " (opt: "-o ${opt}") config.mountOptions} \
+                  ${lib.optionalString ((config.options.mountpoint or "") != "legacy") "-o zfsutil"} \
+                  -t zfs
+              fi
+            '';
+          };
     };
 
     _unmount = diskoLib.mkUnmountOption {
@@ -125,26 +144,32 @@
       default =
         (lib.optionalAttrs (config.options.keylocation or "none" != "none") {
           dev = "zfs unload-key ${config.name}";
-        }) // lib.optionalAttrs (config.options.mountpoint or "" != "none" && config.options.canmount or "" != "off") {
-          fs.${config.mountpoint} = ''
-            if findmnt ${config._name} "${rootMountPoint}${config.mountpoint}" >/dev/null 2>&1; then
-              umount "${rootMountPoint}${config.mountpoint}"
-            fi
-          '';
-        };
+        })
+        // lib.optionalAttrs
+          (config.options.mountpoint or "" != "none" && config.options.canmount or "" != "off")
+          {
+            fs.${config.mountpoint} = ''
+              if findmnt ${config._name} "${rootMountPoint}${config.mountpoint}" >/dev/null 2>&1; then
+                umount "${rootMountPoint}${config.mountpoint}"
+              fi
+            '';
+          };
     };
 
     _config = lib.mkOption {
       internal = true;
       readOnly = true;
       default =
-        lib.optional (config.options.mountpoint or "" != "none" && config.options.canmount or "" != "off") {
-          fileSystems.${config.mountpoint} = {
-            device = "${config._name}";
-            fsType = "zfs";
-            options = config.mountOptions ++ lib.optional ((config.options.mountpoint or "") != "legacy") "zfsutil";
+        lib.optional (config.options.mountpoint or "" != "none" && config.options.canmount or "" != "off")
+          {
+            fileSystems.${config.mountpoint} = {
+              device = "${config._name}";
+              fsType = "zfs";
+              options =
+                config.mountOptions
+                ++ lib.optional ((config.options.mountpoint or "") != "legacy") "zfsutil";
+            };
           };
-        };
       description = "NixOS configuration";
     };
 
@@ -157,4 +182,3 @@
     };
   };
 }
-

lib/types/zfs_volume.nix

@@ -1,4 +1,11 @@
-{ config, options, lib, diskoLib, parent, ... }:
+{
+  config,
+  options,
+  lib,
+  diskoLib,
+  parent,
+  ...
+}:
 {
   options = {
     name = lib.mkOption {
@@ -35,7 +42,10 @@
       description = "Size of the dataset";
     };
 
-    content = diskoLib.partitionType { parent = config; device = "/dev/zvol/${config._parent.name}/${config.name}"; };
+    content = diskoLib.partitionType {
+      parent = config;
+      device = "/dev/zvol/${config._parent.name}/${config.name}";
+    };
 
     _parent = lib.mkOption {
       internal = true;
@@ -45,8 +55,7 @@
       internal = true;
       readOnly = true;
       type = lib.types.functionTo diskoLib.jsonType;
-      default = dev:
-        lib.optionalAttrs (config.content != null) (config.content._meta dev);
+      default = dev: lib.optionalAttrs (config.content != null) (config.content._meta dev);
       description = "Metadata";
     };
     _create = diskoLib.mkCreateOption {
@@ -83,31 +92,34 @@
       inherit config options;
       default = {
         dev = ''
-          ${lib.optionalString (config.options.keylocation or "none" != "none") "zfs unload-key ${config.name}"}
+          ${lib.optionalString (
+            config.options.keylocation or "none" != "none"
+          ) "zfs unload-key ${config.name}"}
 
           ${config.content._unmount.dev or ""}
         '';
 
-        fs = config.content._unmount.fs or {};
+        fs = config.content._unmount.fs or { };
       };
     };
     _config = lib.mkOption {
       internal = true;
       readOnly = true;
-      default =
-        lib.optional (config.content != null) config.content._config;
+      default = lib.optional (config.content != null) config.content._config;
       description = "NixOS configuration";
     };
     _pkgs = lib.mkOption {
       internal = true;
       readOnly = true;
       type = lib.types.functionTo (lib.types.listOf lib.types.package);
-      default = pkgs: [
-        pkgs.util-linux
-        pkgs.parted # for partprobe
-      ] ++ lib.optionals (config.content != null) (config.content._pkgs pkgs);
+      default =
+        pkgs:
+        [
+          pkgs.util-linux
+          pkgs.parted # for partprobe
+        ]
+        ++ lib.optionals (config.content != null) (config.content._pkgs pkgs);
       description = "Packages";
     };
   };
 }
-

lib/types/zpool.nix

@@ -1,4 +1,11 @@
-{ config, options, lib, diskoLib, rootMountPoint, ... }:
+{
+  config,
+  options,
+  lib,
+  diskoLib,
+  rootMountPoint,
+  ...
+}:
 let
   # TODO: Consider expanding to handle `file` and `draid` mode options.
   modeOptions = [
@@ -63,134 +70,161 @@ in
           };
         };
       };
-      type = (lib.types.oneOf [
-        (lib.types.enum modeOptions)
-        (lib.types.attrsOf (diskoLib.subType {
-          types = {
-            topology =
-              let
-                vdev = lib.types.submodule ({ ... }: {
-                  options = {
-                    mode = lib.mkOption {
-                      type = lib.types.enum modeOptions;
-                      default = "";
-                      description = "Mode of the zfs vdev";
-                    };
-                    members = lib.mkOption {
-                      type = lib.types.listOf lib.types.str;
-                      description = "Members of the vdev";
-                    };
-                  };
-                });
-              in
-              lib.types.submodule
-                ({ ... }: {
-                  options = {
-                    type = lib.mkOption {
-                      type = lib.types.enum [ "topology" ];
-                      default = "topology";
-                      internal = true;
-                      description = "Type";
-                    };
-                    # zfs device types
-                    vdev = lib.mkOption {
-                      type = lib.types.listOf vdev;
-                      default = [ ];
-                      description = ''
-                        A list of storage vdevs. See
-                        https://openzfs.github.io/openzfs-docs/man/master/7/zpoolconcepts.7.html#Virtual_Devices_(vdevs)
-                        for details.
-                      '';
-                      example = [
-                        {
-                          mode = "mirror";
-                          members = [ "x" "y" ];
-                        }
-                        {
-                          members = [ "z" ];
-                        }
-                      ];
-                    };
-                    spare = lib.mkOption {
-                      type = lib.types.listOf lib.types.str;
-                      default = [ ];
-                      description = ''
-                        A list of devices to use as hot spares. See
-                        https://openzfs.github.io/openzfs-docs/man/master/7/zpoolconcepts.7.html#Hot_Spares
-                        for details.
-                      '';
-                      example = [ "x" "y" ];
-                    };
-                    log = lib.mkOption {
-                      type = lib.types.listOf vdev;
-                      default = [ ];
-                      description = ''
-                        A list of vdevs used for the zfs intent log (ZIL). See
-                        https://openzfs.github.io/openzfs-docs/man/master/7/zpoolconcepts.7.html#Intent_Log
-                        for details.
-                      '';
-                      example = [
-                        {
-                          mode = "mirror";
-                          members = [ "x" "y" ];
-                        }
-                        {
-                          members = [ "z" ];
-                        }
-                      ];
-                    };
-                    dedup = lib.mkOption {
-                      type = lib.types.listOf vdev;
-                      default = [ ];
-                      description = ''
-                        A list of vdevs used for the deduplication table. See
-                        https://openzfs.github.io/openzfs-docs/man/master/7/zpoolconcepts.7.html#dedup
-                        for details.
-                      '';
-                      example = [
-                        {
-                          mode = "mirror";
-                          members = [ "x" "y" ];
-                        }
-                        {
-                          members = [ "z" ];
-                        }
-                      ];
-                    };
-                    special = lib.mkOption {
-                      type = lib.types.either (lib.types.listOf vdev) (lib.types.nullOr vdev);
-                      default = [ ];
-                      description = ''
-                        A list of vdevs used as special devices. See
-                        https://openzfs.github.io/openzfs-docs/man/master/7/zpoolconcepts.7.html#special
-                        for details.
-                      '';
-                      example = [
-                        {
-                          mode = "mirror";
-                          members = [ "x" "y" ];
-                        }
-                        {
-                          members = [ "z" ];
-                        }
-                      ];
-                    };
-                    cache = lib.mkOption {
-                      type = lib.types.listOf lib.types.str;
-                      default = [ ];
-                      description = ''
-                        A dedicated zfs cache device (L2ARC). See
-                        https://openzfs.github.io/openzfs-docs/man/master/7/zpoolconcepts.7.html#Cache_Devices
-                        for details.
-                      '';
-                      example = [ "x" "y" ];
-                    };
-                  };
-                });
-          };
-          extraArgs.parent = config;
-        }))
-      ]);
+      type = (
+        lib.types.oneOf [
+          (lib.types.enum modeOptions)
+          (lib.types.attrsOf (
+            diskoLib.subType {
+              types = {
+                topology =
+                  let
+                    vdev = lib.types.submodule (
+                      { ... }:
+                      {
+                        options = {
+                          mode = lib.mkOption {
+                            type = lib.types.enum modeOptions;
+                            default = "";
+                            description = "Mode of the zfs vdev";
+                          };
+                          members = lib.mkOption {
+                            type = lib.types.listOf lib.types.str;
+                            description = "Members of the vdev";
+                          };
+                        };
+                      }
+                    );
+                  in
+                  lib.types.submodule (
+                    { ... }:
+                    {
+                      options = {
+                        type = lib.mkOption {
+                          type = lib.types.enum [ "topology" ];
+                          default = "topology";
+                          internal = true;
+                          description = "Type";
+                        };
+                        # zfs device types
+                        vdev = lib.mkOption {
+                          type = lib.types.listOf vdev;
+                          default = [ ];
+                          description = ''
+                            A list of storage vdevs. See
+                            https://openzfs.github.io/openzfs-docs/man/master/7/zpoolconcepts.7.html#Virtual_Devices_(vdevs)
+                            for details.
+                          '';
+                          example = [
+                            {
+                              mode = "mirror";
+                              members = [
+                                "x"
+                                "y"
+                              ];
+                            }
+                            {
+                              members = [ "z" ];
+                            }
+                          ];
+                        };
+                        spare = lib.mkOption {
+                          type = lib.types.listOf lib.types.str;
+                          default = [ ];
+                          description = ''
+                            A list of devices to use as hot spares. See
+                            https://openzfs.github.io/openzfs-docs/man/master/7/zpoolconcepts.7.html#Hot_Spares
+                            for details.
+                          '';
+                          example = [
+                            "x"
+                            "y"
+                          ];
+                        };
+                        log = lib.mkOption {
+                          type = lib.types.listOf vdev;
+                          default = [ ];
+                          description = ''
+                            A list of vdevs used for the zfs intent log (ZIL). See
+                            https://openzfs.github.io/openzfs-docs/man/master/7/zpoolconcepts.7.html#Intent_Log
+                            for details.
+                          '';
+                          example = [
+                            {
+                              mode = "mirror";
+                              members = [
+                                "x"
+                                "y"
+                              ];
+                            }
+                            {
+                              members = [ "z" ];
+                            }
+                          ];
+                        };
+                        dedup = lib.mkOption {
+                          type = lib.types.listOf vdev;
+                          default = [ ];
+                          description = ''
+                            A list of vdevs used for the deduplication table. See
+                            https://openzfs.github.io/openzfs-docs/man/master/7/zpoolconcepts.7.html#dedup
+                            for details.
+                          '';
+                          example = [
+                            {
+                              mode = "mirror";
+                              members = [
+                                "x"
+                                "y"
+                              ];
+                            }
+                            {
+                              members = [ "z" ];
+                            }
+                          ];
+                        };
+                        special = lib.mkOption {
+                          type = lib.types.either (lib.types.listOf vdev) (lib.types.nullOr vdev);
+                          default = [ ];
+                          description = ''
+                            A list of vdevs used as special devices. See
+                            https://openzfs.github.io/openzfs-docs/man/master/7/zpoolconcepts.7.html#special
+                            for details.
+                          '';
+                          example = [
+                            {
+                              mode = "mirror";
+                              members = [
+                                "x"
+                                "y"
+                              ];
+                            }
+                            {
+                              members = [ "z" ];
+                            }
+                          ];
+                        };
+                        cache = lib.mkOption {
+                          type = lib.types.listOf lib.types.str;
+                          default = [ ];
+                          description = ''
+                            A dedicated zfs cache device (L2ARC). See
+                            https://openzfs.github.io/openzfs-docs/man/master/7/zpoolconcepts.7.html#Cache_Devices
+                            for details.
+                          '';
+                          example = [
+                            "x"
+                            "y"
+                          ];
+                        };
+                      };
+                    }
+                  );
+              };
+              extraArgs.parent = config;
+            }
+          ))
+        ]
+      );
       description = "Mode of the ZFS pool";
     };
     options = lib.mkOption {
@@ -214,18 +248,25 @@ in
       description = "Options to pass to mount";
     };
     datasets = lib.mkOption {
-      type = lib.types.attrsOf (diskoLib.subType {
-        types = { inherit (diskoLib.types) zfs_fs zfs_volume; };
-        extraArgs.parent = config;
-      });
+      type = lib.types.attrsOf (
+        diskoLib.subType {
+          types = { inherit (diskoLib.types) zfs_fs zfs_volume; };
+          extraArgs.parent = config;
+        }
+      );
       description = "List of datasets to define";
     };
     _meta = lib.mkOption {
       internal = true;
       readOnly = true;
       type = diskoLib.jsonType;
-      default =
-        diskoLib.deepMergeMap (dataset: dataset._meta [ "zpool" config.name ]) (lib.attrValues config.datasets);
+      default = diskoLib.deepMergeMap (
+        dataset:
+        dataset._meta [
+          "zpool"
+          config.name
+        ]
+      ) (lib.attrValues config.datasets);
       description = "Metadata";
     };
     _create = diskoLib.mkCreateOption {
@@ -234,14 +275,14 @@ in
         let
           formatOutput = type: mode: members: ''
             entries+=("${type} ${mode}=${
-              lib.concatMapStringsSep " "
-              (d: if lib.strings.hasPrefix "/" d then d else "/dev/disk/by-partlabel/disk-${d}-zfs") members
+              lib.concatMapStringsSep " " (
+                d: if lib.strings.hasPrefix "/" d then d else "/dev/disk/by-partlabel/disk-${d}-zfs"
+              ) members
             }")
           '';
           formatVdev = type: vdev: formatOutput type vdev.mode vdev.members;
-          formatVdevList = type: vdevs: lib.concatMapStrings
-            (formatVdev type)
-            (builtins.sort (a: _: a.mode == "") vdevs);
+          formatVdevList =
+            type: vdevs: lib.concatMapStrings (formatVdev type) (builtins.sort (a: _: a.mode == "") vdevs);
           hasTopology = !(builtins.isString config.mode);
           mode = if hasTopology then "prescribed" else config.mode;
           topology = lib.optionalAttrs hasTopology config.mode.topology;
@@ -281,18 +322,20 @@ in
                 topology="${mode} ''${zfs_devices[*]}"
               else
                 entries=()
-                ${lib.optionalString (hasTopology && topology.vdev != null)
-                    (formatVdevList "" topology.vdev)}
-                ${lib.optionalString (hasTopology && topology.spare != [])
-                    (formatOutput "spare" "" topology.spare)}
-                ${lib.optionalString (hasTopology && topology.log != [])
-                    (formatVdevList "log" topology.log)}
-                ${lib.optionalString (hasTopology && topology.dedup != [])
-                    (formatVdevList "dedup" topology.dedup)}
-                ${lib.optionalString (hasTopology && topology.special != null && topology.special != [])
-                    (formatVdevList "special" (lib.lists.toList topology.special))}
-                ${lib.optionalString (hasTopology && topology.cache != [])
-                    (formatOutput "cache" "" topology.cache)}
+                ${lib.optionalString (hasTopology && topology.vdev != null) (formatVdevList "" topology.vdev)}
+                ${lib.optionalString (hasTopology && topology.spare != [ ]) (
+                  formatOutput "spare" "" topology.spare
+                )}
+                ${lib.optionalString (hasTopology && topology.log != [ ]) (formatVdevList "log" topology.log)}
+                ${lib.optionalString (hasTopology && topology.dedup != [ ]) (
+                  formatVdevList "dedup" topology.dedup
+                )}
+                ${lib.optionalString (hasTopology && topology.special != null && topology.special != [ ]) (
+                  formatVdevList "special" (lib.lists.toList topology.special)
+                )}
+                ${lib.optionalString (hasTopology && topology.cache != [ ]) (
+                  formatOutput "cache" "" topology.cache
+                )}
                 all_devices=()
                 last_type=
                 for line in "''${entries[@]}"; do
@@ -337,7 +380,9 @@ in
       inherit config options;
       default =
         let
-          datasetFilesystemsMounts = diskoLib.deepMergeMap (dataset: dataset._mount.fs or {}) (lib.attrValues config.datasets);
+          datasetFilesystemsMounts = diskoLib.deepMergeMap (dataset: dataset._mount.fs or { }) (
+            lib.attrValues config.datasets
+          );
         in
         {
           dev = ''
@@ -359,7 +404,7 @@ in
             zpool export "${config.name}"
           fi
         '';
-        fs = diskoLib.deepMergeMap (dataset: dataset._unmount.fs or {}) (lib.attrValues config.datasets);
+        fs = diskoLib.deepMergeMap (dataset: dataset._unmount.fs or { }) (lib.attrValues config.datasets);
       };
     };
     _config = lib.mkOption {
@@ -372,7 +417,13 @@ in
       internal = true;
       readOnly = true;
       type = lib.types.functionTo (lib.types.listOf lib.types.package);
-      default = pkgs: [ pkgs.gnugrep pkgs.util-linux ] ++ lib.flatten (map (dataset: dataset._pkgs pkgs) (lib.attrValues config.datasets));
+      default =
+        pkgs:
+        [
+          pkgs.gnugrep
+          pkgs.util-linux
+        ]
+        ++ lib.flatten (map (dataset: dataset._pkgs pkgs) (lib.attrValues config.datasets));
       description = "Packages";
     };
   };

module.nix

@@ -1,4 +1,11 @@
-{ config, lib, pkgs, extendModules, diskoLib, ... }:
+{
+  config,
+  lib,
+  pkgs,
+  extendModules,
+  diskoLib,
+  ...
+}:
 let
   cfg = config.disko;
 
@@ -107,7 +114,10 @@ in
       };
 
       imageFormat = lib.mkOption {
-        type = lib.types.enum [ "raw" "qcow2" ];
+        type = lib.types.enum [
+          "raw"
+          "qcow2"
+        ];
         description = "QEMU image format to use for the disk images";
         default = "raw";
       };
@@ -239,38 +249,49 @@ in
       eval-config = import (pkgs.path + "/nixos/lib/eval-config.nix");
     };
 
-    system.build = (cfg.devices._scripts { inherit pkgs; checked = cfg.checkScripts; }) // (
-      let
-        throwIfNoDisksDetected = _: v: if cfg.devices.disk == { } then throw "No disks defined, did you forget to import your disko config?" else v;
-      in
-      lib.mapAttrs throwIfNoDisksDetected {
-        # we keep these old outputs for compatibility
-        disko = builtins.trace "the .disko output is deprecated, please use .diskoScript instead" (cfg.devices._scripts { inherit pkgs; }).diskoScript;
-        diskoNoDeps = builtins.trace "the .diskoNoDeps output is deprecated, please use .diskoScriptNoDeps instead" (cfg.devices._scripts { inherit pkgs; }).diskoScriptNoDeps;
+    system.build =
+      (cfg.devices._scripts {
+        inherit pkgs;
+        checked = cfg.checkScripts;
+      })
+      // (
+        let
+          throwIfNoDisksDetected =
+            _: v:
+            if cfg.devices.disk == { } then
+              throw "No disks defined, did you forget to import your disko config?"
+            else
+              v;
+        in
+        lib.mapAttrs throwIfNoDisksDetected {
+          # we keep these old outputs for compatibility
+          disko =
+            builtins.trace "the .disko output is deprecated, please use .diskoScript instead"
+              (cfg.devices._scripts { inherit pkgs; }).diskoScript;
+          diskoNoDeps =
+            builtins.trace "the .diskoNoDeps output is deprecated, please use .diskoScriptNoDeps instead"
+              (cfg.devices._scripts { inherit pkgs; }).diskoScriptNoDeps;
 
-        installTest = diskoLib.testLib.makeDiskoTest {
-          inherit extendModules pkgs;
-          name = "${config.networking.hostName}-disko";
-          disko-config = builtins.removeAttrs config [ "_module" ];
-          testMode = "direct";
-          bootCommands = cfg.tests.bootCommands;
-          efi = cfg.tests.efi;
-          enableOCR = cfg.tests.enableOCR;
-          extraSystemConfig = cfg.tests.extraConfig;
-          extraTestScript = cfg.tests.extraChecks;
-        };
+          installTest = diskoLib.testLib.makeDiskoTest {
+            inherit extendModules pkgs;
+            name = "${config.networking.hostName}-disko";
+            disko-config = builtins.removeAttrs config [ "_module" ];
+            testMode = "direct";
+            bootCommands = cfg.tests.bootCommands;
+            efi = cfg.tests.efi;
+            enableOCR = cfg.tests.enableOCR;
+            extraSystemConfig = cfg.tests.extraConfig;
+            extraTestScript = cfg.tests.extraChecks;
+          };
 
-        vmWithDisko = lib.mkDefault config.virtualisation.vmVariantWithDisko.system.build.vmWithDisko;
-      }
-    );
+          vmWithDisko = lib.mkDefault config.virtualisation.vmVariantWithDisko.system.build.vmWithDisko;
+        }
+      );
 
     # we need to specify the keys here, so we don't get an infinite recursion error
     # Remember to add config keys here if they are added to types
-    fileSystems = lib.mkIf
-      cfg.enableConfig cfg.devices._config.fileSystems or { };
-    boot = lib.mkIf
-      cfg.enableConfig cfg.devices._config.boot or { };
-    swapDevices = lib.mkIf
-      cfg.enableConfig cfg.devices._config.swapDevices or [ ];
+    fileSystems = lib.mkIf cfg.enableConfig cfg.devices._config.fileSystems or { };
+    boot = lib.mkIf cfg.enableConfig cfg.devices._config.boot or { };
+    swapDevices = lib.mkIf cfg.enableConfig cfg.devices._config.swapDevices or [ ];
   };
 }

package.nix

@@ -1,4 +1,14 @@
-{ stdenvNoCC, makeWrapper, lib, path, nix, coreutils, nixos-install-tools, binlore, diskoVersion }:
+{
+  stdenvNoCC,
+  makeWrapper,
+  lib,
+  path,
+  nix,
+  coreutils,
+  nixos-install-tools,
+  binlore,
+  diskoVersion,
+}:
 
 let
   self = stdenvNoCC.mkDerivation (finalAttrs: {
@@ -16,7 +26,13 @@ let
         chmod 755 "$out/bin/$i"
         wrapProgram "$out/bin/$i" \
           --set DISKO_VERSION "${diskoVersion}" \
-          --prefix PATH : ${lib.makeBinPath [ nix coreutils nixos-install-tools ]} \
+          --prefix PATH : ${
+            lib.makeBinPath [
+              nix
+              coreutils
+              nixos-install-tools
+            ]
+          } \
           --prefix NIX_PATH : "nixpkgs=${path}"
       done
     '';

scripts/create-release.sh

@@ -1,3 +1,5 @@
+#! /usr/bin/env bash
+
 # Don't run directly! Instead, use
 # nix run .#create-release
 

tests/bcachefs.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/boot-raid1.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/btrfs-only-root-subvolume.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/btrfs-subvolumes.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;
@@ -17,4 +18,3 @@ diskoLib.testLib.makeDiskoTest {
     machine.succeed("test -e /partition-root/swapfile1");
   '';
 }
-

tests/cli.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;
@@ -26,7 +27,10 @@ diskoLib.testLib.makeDiskoTest {
     ];
   };
   extraInstallerConfig = {
-    boot.kernelModules = [ "dm-raid" "dm-mirror" ];
+    boot.kernelModules = [
+      "dm-raid"
+      "dm-mirror"
+    ];
     imports = [
       ../module.nix
     ];

tests/complex.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;
@@ -24,6 +25,9 @@ diskoLib.testLib.makeDiskoTest {
     machine.succeed("test -e /ext4_on_lvm/file-from-postMountHook");
   '';
   extraInstallerConfig = {
-    boot.kernelModules = [ "dm-raid" "dm-mirror" ];
+    boot.kernelModules = [
+      "dm-raid"
+      "dm-mirror"
+    ];
   };
 }

tests/default.nix

@@ -1,20 +1,28 @@
-{ makeTest ? import <nixpkgs/nixos/tests/make-test-python.nix>
-, eval-config ? import <nixpkgs/nixos/lib/eval-config.nix>
-, pkgs ? import <nixpkgs> { }
+{
+  makeTest ? import <nixpkgs/nixos/tests/make-test-python.nix>,
+  eval-config ? import <nixpkgs/nixos/lib/eval-config.nix>,
+  pkgs ? import <nixpkgs> { },
 }:
 let
   lib = pkgs.lib;
   diskoLib = import ../lib { inherit lib makeTest eval-config; };
 
-  allTestFilenames =
-    builtins.map (lib.removeSuffix ".nix") (
-      builtins.filter
-        (x: lib.hasSuffix ".nix" x && x != "default.nix")
-        (lib.attrNames (builtins.readDir ./.))
-    );
-  incompatibleTests = lib.optionals pkgs.stdenv.buildPlatform.isRiscV64 [ "zfs" "zfs-over-legacy" "cli" "module" "complex" ];
+  allTestFilenames = builtins.map (lib.removeSuffix ".nix") (
+    builtins.filter (x: lib.hasSuffix ".nix" x && x != "default.nix") (
+      lib.attrNames (builtins.readDir ./.)
+    )
+  );
+  incompatibleTests = lib.optionals pkgs.stdenv.buildPlatform.isRiscV64 [
+    "zfs"
+    "zfs-over-legacy"
+    "cli"
+    "module"
+    "complex"
+  ];
   allCompatibleFilenames = lib.subtractLists incompatibleTests allTestFilenames;
 
-  allTests = lib.genAttrs allCompatibleFilenames (test: import (./. + "/${test}.nix") { inherit diskoLib pkgs; });
+  allTests = lib.genAttrs allCompatibleFilenames (
+    test: import (./. + "/${test}.nix") { inherit diskoLib pkgs; }
+  );
 in
 allTests

tests/disko-install/configuration.nix

@@ -1,4 +1,10 @@
-{ lib, pkgs, modulesPath, ... }: {
+{
+  lib,
+  pkgs,
+  modulesPath,
+  ...
+}:
+{
   imports = [
     (modulesPath + "/testing/test-instrumentation.nix")
     (modulesPath + "/profiles/qemu-guest.nix")
@@ -13,11 +19,15 @@
     hashed-mirrors = null;
     connect-timeout = 3;
     flake-registry = pkgs.writeText "flake-registry" ''{"flakes":[],"version":2}'';
-    experimental-features = [ "nix-command" "flakes" ];
+    experimental-features = [
+      "nix-command"
+      "flakes"
+    ];
   };
   services.openssh.enable = true;
-  boot.kernelParams = [ "console=tty0" ] ++
-    (lib.optional (pkgs.stdenv.hostPlatform.isAarch) "ttyAMA0,115200") ++
-    (lib.optional (pkgs.stdenv.hostPlatform.isRiscV64) "ttySIF0,115200") ++
-    [ "console=ttyS0,115200" ];
+  boot.kernelParams =
+    [ "console=tty0" ]
+    ++ (lib.optional (pkgs.stdenv.hostPlatform.isAarch) "ttyAMA0,115200")
+    ++ (lib.optional (pkgs.stdenv.hostPlatform.isRiscV64) "ttySIF0,115200")
+    ++ [ "console=ttyS0,115200" ];
 }

tests/disko-install/default.nix

@@ -1,4 +1,8 @@
-{ pkgs ? import <nixpkgs> { }, self, diskoVersion }:
+{
+  pkgs ? import <nixpkgs> { },
+  self,
+  diskoVersion,
+}:
 let
   disko = pkgs.callPackage ../../package.nix { inherit diskoVersion; };
 

tests/f2fs.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/gpt-bios-compat.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/gpt-name-with-special-chars.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/gpt-unformatted.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/hybrid-mbr.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/hybrid-tmpfs-on-root.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/hybrid.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/legacy-table-with-whitespace.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/legacy-table.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/long-device-name.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/luks-btrfs-subvolumes.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/luks-lvm.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/luks-on-mdadm.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/lvm-raid.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;
@@ -9,7 +10,11 @@ diskoLib.testLib.makeDiskoTest {
     machine.succeed("mountpoint /home");
   '';
   extraInstallerConfig = {
-    boot.kernelModules = [ "dm-raid" "raid0" "dm-mirror" ];
+    boot.kernelModules = [
+      "dm-raid"
+      "raid0"
+      "dm-mirror"
+    ];
   };
   extraSystemConfig = {
     # sadly systemd-boot fails to install to a raid /boot device

tests/lvm-sizes-sort.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/lvm-thin.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/make-disk-image-impure.nix

@@ -1,13 +1,17 @@
-{ pkgs ? import <nixpkgs> { }
-, ...
+{
+  pkgs ? import <nixpkgs> { },
+  ...
 }:
 
 (pkgs.nixos [
   ../module.nix
   ../example/simple-efi.nix
-  ({ config, ... }: {
-    documentation.enable = false;
-    system.stateVersion = config.system.nixos.version;
-    disko.checkScripts = true;
-  })
+  (
+    { config, ... }:
+    {
+      documentation.enable = false;
+      system.stateVersion = config.system.nixos.version;
+      disko.checkScripts = true;
+    }
+  )
 ]).config.system.build.diskoImagesScript

tests/make-disk-image.nix

@@ -1,14 +1,18 @@
-{ pkgs ? import <nixpkgs> { }
-, ...
+{
+  pkgs ? import <nixpkgs> { },
+  ...
 }:
 
 (pkgs.nixos [
   ../module.nix
   ../example/simple-efi.nix
-  ({ config, ... }: {
-    documentation.enable = false;
-    system.stateVersion = config.system.nixos.version;
-    disko.memSize = 2048;
-    disko.checkScripts = true;
-  })
+  (
+    { config, ... }:
+    {
+      documentation.enable = false;
+      system.stateVersion = config.system.nixos.version;
+      disko.memSize = 2048;
+      disko.checkScripts = true;
+    }
+  )
 ]).config.system.build.diskoImages

tests/mdadm-raid0.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/mdadm.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/module.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;
@@ -21,6 +22,9 @@ diskoLib.testLib.makeDiskoTest {
     machine.succeed("mountpoint /ext4_on_lvm");
   '';
   extraInstallerConfig = {
-    boot.kernelModules = [ "dm-raid" "dm-mirror" ];
+    boot.kernelModules = [
+      "dm-raid"
+      "dm-mirror"
+    ];
   };
 }

tests/multi-device-no-deps.nix

@@ -1,6 +1,7 @@
 # this is a regression test for https://github.com/nix-community/disko/issues/52
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/negative-size.nix

@@ -1,6 +1,7 @@
 # this is a regression test for https://github.com/nix-community/disko/issues/52
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/non-root-zfs.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/simple-efi.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/standalone.nix

@@ -1,4 +1,7 @@
-{ pkgs ? import <nixpkgs> { }, ... }:
+{
+  pkgs ? import <nixpkgs> { },
+  ...
+}:
 (pkgs.nixos [
   ../example/stand-alone/configuration.nix
   { documentation.enable = false; }

tests/swap.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/tmpfs.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/with-lib.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/xfs.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/zfs-encrypted-root.nix

@@ -1,18 +1,17 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;
   name = "zfs-encrypted-root";
   extraInstallerConfig.networking.hostId = "8425e349";
   extraSystemConfig.networking.hostId = "8425e349";
-  disko-config =
-    pkgs.lib.recursiveUpdate (import ../example/zfs-encrypted-root.nix) {
-      disko.devices.zpool.zroot.datasets.root.options.keylocation = "file:///tmp/secret.key";
-    };
+  disko-config = pkgs.lib.recursiveUpdate (import ../example/zfs-encrypted-root.nix) {
+    disko.devices.zpool.zroot.datasets.root.options.keylocation = "file:///tmp/secret.key";
+  };
   extraTestScript = ''
     machine.succeed("mountpoint /");
     machine.succeed("mountpoint /nix");
   '';
 }
-

tests/zfs-over-legacy.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;
@@ -12,4 +13,3 @@ diskoLib.testLib.makeDiskoTest {
     machine.succeed("mountpoint /zfs_fs");
   '';
 }
-

tests/zfs-with-vdevs.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

tests/zfs.nix

@@ -1,5 +1,6 @@
-{ pkgs ? import <nixpkgs> { }
-, diskoLib ? pkgs.callPackage ../lib { }
+{
+  pkgs ? import <nixpkgs> { },
+  diskoLib ? pkgs.callPackage ../lib { },
 }:
 diskoLib.testLib.makeDiskoTest {
   inherit pkgs;

version.nix

@@ -1 +1,4 @@
-{ version = "1.10.0"; released = false; }
+{
+  version = "1.10.0";
+  released = false;
+}