home-manager/modules/services/pass-secret-service.nix

{ pkgs, config, lib, ... }:

with lib;

let
  cfg = config.services.pass-secret-service;

  conflictingModules = [ "services.gnome-keyring" ];

  moduleIsEnabled = v: config.${v}.enable or false;
  hasConflicts = modulePathName: !(any moduleIsEnabled modulePathName);
  getConflicts = filter moduleIsEnabled;

  busName = "org.freedesktop.secrets";
in {
  meta.maintainers = with maintainers; [ cab404 cyntheticfox ];

  options.services.pass-secret-service = {
    enable = mkEnableOption "Pass libsecret service";

    package = mkPackageOption pkgs "pass-secret-service" { };

    storePath = mkOption {
      type = with types; nullOr str;
      default = null;
      defaultText = "$HOME/.password-store";
      example = "/home/user/.local/share/password-store";
      description = ''
        Absolute path to password store. Defaults to
        <filename>$HOME/.password-store</filename> if the
        <option>programs.password-store</option> module is not enabled, and
        <option>programs.password-store.settings.PASSWORD_STORE_DIR</option> else.
      '';
    };
  };

  config = mkIf cfg.enable {
    assertions = [
      (hm.assertions.assertPlatform "services.pass-secret-service" pkgs
        platforms.linux)
      {
        assertion = hasConflicts conflictingModules;
        message = ''
          Only one secrets service per user can be enabled at a time.
          Other services enabled:
          <ul>
          ${map (v: ''
            <li><option>${v}</option></li>
          '') (getConflicts conflictingModules)}
          </ul>
        '';
      }
    ];

    systemd.user.services.pass-secret-service =
      let binPath = "${cfg.package}/bin/pass_secret_service";
      in {
        Unit = {
          AssertFileIsExecutable = "${binPath}";
          Description = "Pass libsecret service";
          Documentation = "https://github.com/mdellweg/pass_secret_service";
          PartOf = [ "default.target" ];
        };

        Service = {
          Type = "dbus";
          ExecStart = "${binPath} ${
              optionalString (cfg.storePath != null) "--path ${cfg.storePath}"
            }";
          BusName = busName;
        };

        Install.WantedBy = [ "default.target" ];
      };

    xdg.dataFile."dbus-1/services/${busName}.service".source =
      "${cfg.package}/share/dbus-1/services/${busName}.service";
  };
}