add systemd file

Signed-off-by: Florian Brandes <florian.brandes@posteo.de>

default.nix

@@ -22,6 +22,13 @@ pkgs.python3Packages.buildPythonPackage rec {
   nativeCheckInputs = [ pkgs.python3Packages.pytestCheckHook ];
   pythonImportsCheck = [ "smtprd_ng" ];
 
+  postInstall = ''
+    install -D -m 644 systemd/smtprd-ng.service \
+      $out/lib/systemd/system/smtprd-ng.service
+    substituteInPlace $out/lib/systemd/system/smtprd-ng.service \
+      --replace-fail @smtprd@ "$out/bin/smtprd-ng"
+  '';
+
   meta = {
     description = "SMTP forwarding relay daemon with signing and encryption";
     homepage = "https://app.radicle.xyz/nodes/seed.radicle.garden/rad:z3gWc1qgaeZaoGwL4WTstLNoqjayM";

pyproject.toml

@@ -23,3 +23,6 @@ Repository = "https://app.radicle.xyz/nodes/seed.radicle.garden/rad:z3gWc1qgaeZa
 
 [project.optional-dependencies]
 tests = ["pytest", "pytest-cov"]
+
+[tool.setuptools]
+packages = ["smtprd_ng"]

systemd/smtprd-ng.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=SMTP Relay Daemon
+
+[Service]
+User=mail
+Group=mail
+Type=exec
+ExecStart=@smtprd@ --config /etc/smtprd.ini
+
+[Install]
+WantedBy=multi-user.target