dconf: support configuring specific user databases

nix-community · Jan 10, 2025 · 390eca3 · 390eca3
1 parent bf23fe4
commit 390eca3
Showing 1 changed file with 86 additions and 55 deletions.
diff --git a/modules/misc/dconf.nix b/modules/misc/dconf.nix
@@ -13,10 +13,23 @@ let
   # The dconf keys managed by this configuration. We store this as part of the
   # generation state to be able to reset keys that become unmanaged during
   # switch.
-  stateDconfKeys = pkgs.writeText "dconf-keys.json" (builtins.toJSON
-    (concatLists (mapAttrsToList
-      (dir: entries: mapAttrsToList (key: _: "/${dir}/${key}") entries)
-      cfg.settings)));
+  mkStateDconfKeys = nameSuffix: settings:
+    pkgs.writeText "dconf-keys${nameSuffix}.json" (builtins.toJSON (concatLists
+      (mapAttrsToList
+        (dir: entries: mapAttrsToList (key: _: "/${dir}/${key}") entries)
+        settings)));
+
+  databases = optional (cfg.settings != { }) {
+    dconfProfile = null;
+    stateDconfKeys = mkStateDconfKeys "" cfg.settings;
+    inherit (cfg) settings;
+  } ++ mapAttrsToList (name: value: {
+    dconfProfile = pkgs.writeText "dconf-profile-${name}" ''
+      user-db:${name}
+    '';
+    stateDconfKeys = mkStateDconfKeys "-${name}" value;
+    settings = value;
+  }) cfg.databases;
 
 in {
   meta.maintainers = [ maintainers.rycee ];
@@ -72,65 +85,83 @@ in {
           to convert dconf database dumps into compatible Nix expression.
         '';
       };
+
+      databases = mkOption {
+        type = with types; attrsOf (attrsOf (attrsOf hm.types.gvariant));
+        default = { };
+        description = ''
+          Settings to write to specific dconf user databases.
+
+          See [](#opt-dconf.settings) for details.
+        '';
+      };
     };
   };
 
-  config = mkIf (cfg.enable && cfg.settings != { }) {
+  config = mkIf (cfg.enable && databases != [ ]) {
     # Make sure the dconf directory exists.
     xdg.configFile."dconf/.keep".source = builtins.toFile "keep" "";
 
     home.extraBuilderCommands = ''
       mkdir -p $out/state/
-      ln -s ${stateDconfKeys} $out/state/${stateDconfKeys.name}
-    '';
+    '' + concatMapStrings (db: ''
+      ln -s ${db.stateDconfKeys} $out/state/${db.stateDconfKeys.name}
+    '') databases;
+
+    home.activation.dconfSettings = hm.dag.entryAfter [ "installPackages" ]
+      (concatMapStrings (db:
+        let
+          iniFile = pkgs.writeText "hm-dconf.ini" (toDconfIni db.settings);
+
+          statePath = "state/${db.stateDconfKeys.name}";
+
+          cleanup = pkgs.writeShellScript "dconf-cleanup" ''
+            set -euo pipefail
+
+            ${config.lib.bash.initHomeManagerLib}
+
+            PATH=${makeBinPath [ pkgs.dconf pkgs.jq ]}''${PATH:+:}$PATH
+
+            oldState="$1"
+            newState="$2"
+
+            # Can't do cleanup if we don't know the old state.
+            if [[ ! -f $oldState ]]; then
+              exit 0
+            fi
+
+            # Reset all keys that are present in the old generation but not the new
+            # one.
+            jq -r -n \
+                --slurpfile old "$oldState" \
+                --slurpfile new "$newState" \
+                '($old[] - $new[])[]' \
+              | while read -r key; do
+                  verboseEcho "Resetting dconf key \"$key\""
+                  run $DCONF_DBUS_RUN_SESSION dconf reset "$key"
+                done
+          '';
+
+          envCommand = optionalString (db.dconfProfile != null)
+            "env DCONF_PROFILE=${db.dconfProfile}";
+        in ''
+          if [[ -v DBUS_SESSION_BUS_ADDRESS ]]; then
+            export DCONF_DBUS_RUN_SESSION="${envCommand}"
+          else
+            export DCONF_DBUS_RUN_SESSION="${pkgs.dbus}/bin/dbus-run-session --dbus-daemon=${pkgs.dbus}/bin/dbus-daemon ${envCommand}"
+          fi
+
+
+
+          if [[ -v oldGenPath ]]; then
+            ${cleanup} \
+              "$oldGenPath/${statePath}" \
+              "$newGenPath/${statePath}"
+          fi
+
+          run $DCONF_DBUS_RUN_SESSION ${pkgs.dconf}/bin/dconf load / < ${iniFile}
 
-    home.activation.dconfSettings = hm.dag.entryAfter [ "installPackages" ] (let
-      iniFile = pkgs.writeText "hm-dconf.ini" (toDconfIni cfg.settings);
-
-      statePath = "state/${stateDconfKeys.name}";
-
-      cleanup = pkgs.writeShellScript "dconf-cleanup" ''
-        set -euo pipefail
-
-        ${config.lib.bash.initHomeManagerLib}
-
-        PATH=${makeBinPath [ pkgs.dconf pkgs.jq ]}''${PATH:+:}$PATH
-
-        oldState="$1"
-        newState="$2"
-
-        # Can't do cleanup if we don't know the old state.
-        if [[ ! -f $oldState ]]; then
-          exit 0
-        fi
-
-        # Reset all keys that are present in the old generation but not the new
-        # one.
-        jq -r -n \
-            --slurpfile old "$oldState" \
-            --slurpfile new "$newState" \
-            '($old[] - $new[])[]' \
-          | while read -r key; do
-              verboseEcho "Resetting dconf key \"$key\""
-              run $DCONF_DBUS_RUN_SESSION dconf reset "$key"
-            done
-      '';
-    in ''
-      if [[ -v DBUS_SESSION_BUS_ADDRESS ]]; then
-        export DCONF_DBUS_RUN_SESSION=""
-      else
-        export DCONF_DBUS_RUN_SESSION="${pkgs.dbus}/bin/dbus-run-session --dbus-daemon=${pkgs.dbus}/bin/dbus-daemon"
-      fi
-
-      if [[ -v oldGenPath ]]; then
-        ${cleanup} \
-          "$oldGenPath/${statePath}" \
-          "$newGenPath/${statePath}"
-      fi
-
-      run $DCONF_DBUS_RUN_SESSION ${pkgs.dconf}/bin/dconf load / < ${iniFile}
-
-      unset DCONF_DBUS_RUN_SESSION
-    '');
+          unset DCONF_DBUS_RUN_SESSION
+        '') databases);
   };
 }