nix: use unwrapped program by default in module

- Add watchdog timeout support
- Add native journald logging support
- Add application state notifications
- Add verbosity flag

default.nix

@@ -4,6 +4,7 @@
 , rustPlatform
 , makeWrapper
 , mpv
+, wrapped ? false
 }:
 
 rustPlatform.buildRustPackage rec {
@@ -36,7 +37,7 @@ rustPlatform.buildRustPackage rec {
     };
   };
 
-  postInstall = ''
+  postInstall = lib.optionalString wrapped ''
     wrapProgram $out/bin/greg-ng \
       --prefix PATH : '${lib.makeBinPath [ mpv ]}'
   '';

flake.nix

@@ -35,7 +35,7 @@
     apps = forAllSystems (system: pkgs: _: {
       default = self.apps.${system}.greg-ng;
       greg-ng = let
-        package = self.packages.${system}.greg-ng;
+        package = self.packages.${system}.greg-ng-wrapped;
       in {
         type = "app";
         program = lib.getExe package;
@@ -63,6 +63,9 @@
     packages = forAllSystems (system: pkgs: _: {
       default = self.packages.${system}.greg-ng;
       greg-ng = pkgs.callPackage ./default.nix { };
+      greg-ng-wrapped = pkgs.callPackage ./default.nix {
+        wrapped = true;
+      };
     });
   } // {
     nixosModules.default = ./module.nix;

module.nix

@@ -109,7 +109,8 @@ in
 
           Restart = "always";
           RestartSec = 3;
-          WatchdogSec = 15;
+          WatchdogSec = lib.mkDefault 15;
+          TimeoutStartSec = lib.mkDefault 30;
 
           RestrictAddressFamilies = [ "AF_UNIX" "AF_INET" "AF_INET6" ];
           AmbientCapabilities = [ "" ];

src/main.rs

@@ -89,6 +89,8 @@ async fn setup_systemd_watchdog_thread() -> anyhow::Result<()> {
 
 async fn shutdown(mpv: Mpv, proc: Option<tokio::process::Child>) {
     log::info!("Shutting down");
+    sd_notify::notify(false, &[sd_notify::NotifyState::Stopping])
+        .unwrap_or_else(|e| log::warn!("Failed to notify systemd that the service is stopping: {}", e));
 
     mpv.disconnect()
         .await
@@ -167,7 +169,7 @@ async fn main() -> anyhow::Result<()> {
     };
 
     if systemd_mode {
-        match sd_notify::notify(true, &[sd_notify::NotifyState::Ready])
+        match sd_notify::notify(false, &[sd_notify::NotifyState::Ready])
             .context("Failed to notify systemd that the service is ready")
         {
             Ok(_) => log::trace!("Notified systemd that the service is ready"),