1 files changed, 48 insertions, 0 deletions
diff --git a/home-manager/modules/services/emacs.nix b/home-manager/modules/services/emacs.nix
new file mode 100644
index 00000000000..33d6871c61b
--- /dev/null
+++ b/home-manager/modules/services/emacs.nix
@@ -0,0 +1,48 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.services.emacs;
+  emacsCfg = config.programs.emacs;
+  emacsBinPath = "${emacsCfg.finalPackage}/bin";
+
+in
+
+{
+  options.services.emacs = {
+    enable = mkEnableOption "the Emacs daemon";
+  };
+
+  config = mkIf cfg.enable {
+    assertions = [
+      {
+        assertion = emacsCfg.enable;
+        message = "The Emacs service module requires"
+          + " 'programs.emacs.enable = true'.";
+      }
+    ];
+
+    systemd.user.services.emacs = {
+      Unit = {
+        Description = "Emacs: the extensible, self-documenting text editor";
+        Documentation = "info:emacs man:emacs(1) https://gnu.org/software/emacs/";
+
+        # Avoid killing the Emacs session, which may be full of
+        # unsaved buffers.
+        X-RestartIfChanged = false;
+      };
+
+      Service = {
+        ExecStart = "${pkgs.runtimeShell} -l -c 'exec ${emacsBinPath}/emacs --fg-daemon'";
+        ExecStop = "${emacsBinPath}/emacsclient --eval '(kill-emacs)'";
+        Restart = "on-failure";
+      };
+
+      Install = {
+        WantedBy = [ "default.target" ];
+      };
+    };
+  };
+}