From 0b229a771e846893e759cd4102172e60a541d439 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Benjamin=20B=C3=A4dorf?= <hello@benjaminbaedorf.eu>
Date: Sat, 13 Aug 2022 20:38:41 +0200
Subject: [PATCH] Barebones ci-runner module

This adds a barebones CI-runner module with the following option:

`pub-solar.ci-runner.enable`

If enabled, this will start a systemd service on boot that runs
`drone-runner-exec`. The configuration expects you to have a file called
`secrets/drone-runner-exec-config` handled by agenix that gets put into
`/run/agenix/drone-runner-exec-config` and is owned by root.

This file should contain a configuration similar to the following:

```
CLIENT_DRONE_RPC_PROTO=https
CLIENT_DRONE_RPC_HOST=drone.company.com
CLIENT_DRONE_RPC_SECRET=super-duper-secret
```
---
 modules/ci-runner/default.nix | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 modules/ci-runner/default.nix

diff --git a/modules/ci-runner/default.nix b/modules/ci-runner/default.nix
new file mode 100644
index 00000000..28325b14
--- /dev/null
+++ b/modules/ci-runner/default.nix
@@ -0,0 +1,35 @@
+{ lib, config, pkgs, self, ... }:
+with lib;
+let
+  psCfg = config.pub-solar;
+  cfg = config.pub-solar.ci-runner;
+in
+{
+  options.pub-solar.ci-runner = {
+    enable = mkEnableOption "Enables a systemd service that runs drone-ci-runner";
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.ci-runner = {
+      enable = true;
+
+      description = "CI runner for the PubSolarOS repository that can run test VM instances with KVM.";
+
+      serviceConfig = {
+        Type = "simple";
+        Restart = "always";
+      };
+
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" "libvirtd.service" ];
+
+      script = ''${pkgs.drone-runner-exec}/bin/drone-runner-exec daemon /run/agenix/drone-runner-exec-config'';
+    };
+
+    age.secrets."drone-runner-exec-config" = {
+      file = "${self}/secrets/drone-runner-exec-config";
+      mode = "700";
+      owner = "root";
+    };
+  };
+}