refactor(home/linux/desktop): home/linux/desktop => home/linux/gui

home/linux/gui/base/immutable-file.nix

@@ -0,0 +1,65 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+##############################################################################################
+#
+#  Provide a option `home.immutable-file`, it works like `home.file` but make the generated file immutable.
+#
+#  Copy from https://github.com/iosmanthus/nixos-config/blob/349917b/modules/immutable-file.nix
+#
+#  this module use the `chattr +i` to make the file immutable, `i` indicates `immutable`,
+#  it's a i-node flags only works on Linux.
+#
+#  TODO not used yet, need to test it.
+#
+##############################################################################################
+with lib; let
+  cfg = config.home.immutable-file;
+  immutableFileOpts = _: {
+    options = {
+      src = mkOption {
+        type = types.path;
+      };
+      dst = mkOption {
+        type = types.path;
+      };
+    };
+  };
+  mkImmutableFile = pkgs.writeScript "make_immutable_file" ''
+    # $1: dst
+    # $2: src
+    if [ ! -d "$(dirname $1)" ]; then
+      mkdir -p $1
+    fi
+
+    if [ -f $1 ]; then
+        sudo chattr -i $1
+    fi
+
+    sudo cp $2 $1
+    sudo chattr +i $1
+  '';
+in {
+  options.home.immutable-file = mkOption {
+    type = with types; attrsOf (submodule immutableFileOpts);
+    default = {};
+  };
+
+  config = mkIf (cfg != {}) {
+    home.activation =
+      mapAttrs'
+      (name: {
+        src,
+        dst,
+      }:
+        nameValuePair
+        "make-immutable-${name}"
+        (lib.hm.dag.entryAfter ["writeBoundary"] ''
+          ${mkImmutableFile} ${dst} ${src}
+        ''))
+      cfg;
+  };
+}