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https://github.com/nix-community/home-manager
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While technically dconf on darwin could work, our activation step requires dbus, which only *lightly* supports Darwin in general, and not at all in the way it's packaged in nixpkgs. Because of this, we just disable dconf for darwin hosts by default. In the future, if someone gets dbus working, this _could_ be re-enabled, unclear whether there's actual value in it though.
126 lines
3.9 KiB
Nix
126 lines
3.9 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.dconf;
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toDconfIni = generators.toINI { mkKeyValue = mkIniKeyValue; };
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mkIniKeyValue = key: value: "${key}=${toString (hm.gvariant.mkValue value)}";
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# The dconf keys managed by this configuration. We store this as part of the
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# generation state to be able to reset keys that become unmanaged during
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# switch.
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stateDconfKeys = pkgs.writeText "dconf-keys.json" (builtins.toJSON
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(concatLists (mapAttrsToList
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(dir: entries: mapAttrsToList (key: _: "/${dir}/${key}") entries)
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cfg.settings)));
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in {
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meta.maintainers = [ maintainers.rycee ];
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options = {
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dconf = {
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enable = mkOption {
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type = types.bool;
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# While technically dconf on darwin could work, our activation step
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# requires dbus, which only *lightly* supports Darwin in general, and
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# not at all in the way it's packaged in nixpkgs. Because of this, we
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# just disable dconf for darwin hosts by default.
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# In the future, if someone gets dbus working, this _could_ be
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# re-enabled, unclear whether there's actual value in it though.
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default = !pkgs.stdenv.hostPlatform.isDarwin;
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visible = false;
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description = ''
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Whether to enable dconf settings.
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</para><para>
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Note, if you use NixOS then you must add
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<code>programs.dconf.enable = true</code>
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to your system configuration. Otherwise you will see a systemd error
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message when your configuration is activated.
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'';
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};
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settings = mkOption {
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type = with types; attrsOf (attrsOf hm.types.gvariant);
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default = { };
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example = literalExpression ''
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{
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"org/gnome/calculator" = {
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button-mode = "programming";
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show-thousands = true;
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base = 10;
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word-size = 64;
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window-position = lib.hm.gvariant.mkTuple [100 100];
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};
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}
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'';
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description = ''
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Settings to write to the dconf configuration system.
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'';
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};
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};
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};
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config = mkIf (cfg.enable && cfg.settings != { }) {
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# Make sure the dconf directory exists.
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xdg.configFile."dconf/.keep".source = builtins.toFile "keep" "";
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home.extraBuilderCommands = ''
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mkdir -p $out/state/
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ln -s ${stateDconfKeys} $out/state/${stateDconfKeys.name}
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'';
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home.activation.dconfSettings = hm.dag.entryAfter [ "installPackages" ] (let
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iniFile = pkgs.writeText "hm-dconf.ini" (toDconfIni cfg.settings);
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statePath = "state/${stateDconfKeys.name}";
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cleanup = pkgs.writeShellScript "dconf-cleanup" ''
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set -euo pipefail
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${config.lib.bash.initHomeManagerLib}
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PATH=${makeBinPath [ pkgs.dconf pkgs.jq ]}''${PATH:+:}$PATH
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oldState="$1"
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newState="$2"
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# Can't do cleanup if we don't know the old state.
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if [[ ! -f $oldState ]]; then
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exit 0
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fi
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# Reset all keys that are present in the old generation but not the new
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# one.
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jq -r -n \
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--slurpfile old "$oldState" \
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--slurpfile new "$newState" \
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'($old[] - $new[])[]' \
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| while read -r key; do
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$VERBOSE_ECHO "Resetting dconf key \"$key\""
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$DRY_RUN_CMD $DCONF_DBUS_RUN_SESSION dconf reset "$key"
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done
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'';
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in ''
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if [[ -v DBUS_SESSION_BUS_ADDRESS ]]; then
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export DCONF_DBUS_RUN_SESSION=""
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else
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export DCONF_DBUS_RUN_SESSION="${pkgs.dbus}/bin/dbus-run-session --dbus-daemon=${pkgs.dbus}/bin/dbus-daemon"
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fi
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if [[ -v oldGenPath ]]; then
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${cleanup} \
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"$oldGenPath/${statePath}" \
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"$newGenPath/${statePath}"
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fi
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$DRY_RUN_CMD $DCONF_DBUS_RUN_SESSION ${pkgs.dconf}/bin/dconf load / < ${iniFile}
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unset DCONF_DBUS_RUN_SESSION
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'');
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};
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}
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