Add updated wsl configuration

2025-08-08 05:52:28 +00:00 · 2022-07-30 13:42:28 +00:00
parent e0b6e5782c
commit 328b2a2d95
20 changed files with 3 additions and 4 deletions
--- a/machines/aether/nixos-wsl/modules/build-tarball.nix
+++ b/machines/aether/nixos-wsl/modules/build-tarball.nix
@@ -0,0 +1,92 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+with builtins;
+with lib; let
+  pkgs2storeContents = l:
+    map (x: {
+      object = x;
+      symlink = "none";
+    })
+    l;
+
+  nixpkgs = lib.cleanSource pkgs.path;
+
+  channelSources =
+    pkgs.runCommand "nixos-${config.system.nixos.version}"
+    {preferLocalBuild = true;}
+    ''
+      mkdir -p $out
+      cp -prd ${nixpkgs.outPath} $out/nixos
+      chmod -R u+w $out/nixos
+      if [ ! -e $out/nixos/nixpkgs ]; then
+        ln -s . $out/nixos/nixpkgs
+      fi
+      echo -n ${toString config.system.nixos.revision} > $out/nixos/.git-revision
+      echo -n ${toString config.system.nixos.versionSuffix} > $out/nixos/.version-suffix
+      echo ${toString config.system.nixos.versionSuffix} | sed -e s/pre// > $out/nixos/svn-revision
+    '';
+
+  preparer = pkgs.writeShellScriptBin "wsl-prepare" ''
+    set -e
+
+    mkdir -m 0755 ./bin ./etc
+    mkdir -m 1777 ./tmp
+
+    # WSL requires a /bin/sh - only temporary, NixOS's activate will overwrite
+    ln -s ${config.users.users.root.shell} ./bin/sh
+
+    # WSL also requires a /bin/mount, otherwise the host fs isn't accessible
+    ln -s /nix/var/nix/profiles/system/sw/bin/mount ./bin/mount
+
+    # Set system profile
+    system=${config.system.build.toplevel}
+    ./$system/sw/bin/nix-store --store `pwd` --load-db < ./nix-path-registration
+    rm ./nix-path-registration
+    ./$system/sw/bin/nix-env --store `pwd` -p ./nix/var/nix/profiles/system --set $system
+
+    # Set channel
+    mkdir -p ./nix/var/nix/profiles/per-user/root
+    ./$system/sw/bin/nix-env --store `pwd` -p ./nix/var/nix/profiles/per-user/root/channels --set ${channelSources}
+    mkdir -m 0700 -p ./root/.nix-defexpr
+    ln -s /nix/var/nix/profiles/per-user/root/channels ./root/.nix-defexpr/channels
+
+    # It's now a NixOS!
+    touch ./etc/NIXOS
+
+    # Write wsl.conf so that it is present when NixOS is started for the first time
+    cp ${config.environment.etc."wsl.conf".source} ./etc/wsl.conf
+
+    # Copy the system configuration
+    mkdir -p ./etc/nixos/nixos-wsl
+    cp -R ${lib.cleanSource ../.}/. ./etc/nixos/nixos-wsl
+    mv ./etc/nixos/nixos-wsl/configuration.nix ./etc/nixos/configuration.nix
+    # Patch the import path to avoid havin a flake.nix in /etc/nixos
+    sed -i 's|import \./default\.nix|import \./nixos-wsl|' ./etc/nixos/configuration.nix
+  '';
+in
+  mkIf config.wsl.enable {
+    # These options make no sense without the wsl-distro module anyway
+
+    system.build.tarball = pkgs.callPackage "${nixpkgs}/nixos/lib/make-system-tarball.nix" {
+      # No contents, structure will be added by prepare script
+      contents = [];
+
+      fileName = "nixos-wsl-${pkgs.hostPlatform.system}";
+
+      storeContents = pkgs2storeContents [
+        config.system.build.toplevel
+        channelSources
+        preparer
+      ];
+
+      extraCommands = "${preparer}/bin/wsl-prepare";
+
+      # Use gzip
+      compressCommand = "gzip";
+      compressionExtension = ".gz";
+    };
+  }