feat(*): initialize new Snix infrastructure

Co-Authored-By: edef <edef@edef.eu>
Co-Authored-by: Ryan Lahfa <raito@lix.systems>
Change-Id: Ica1cda177a236814de900f50a8a61d288f58f519

third_party/alertmanager-irc-relay/module.nix

@@ -0,0 +1,53 @@
+{ config
+, lib
+, pkgs
+, ...
+}:
+let
+  cfg = config.services.alertmanager-irc-relay;
+  yaml = pkgs.formats.yaml { };
+  configFile = yaml.generate "config.yaml" cfg.settings;
+  inherit (lib) mkEnableOption mkIf types mkOption mapAttrs mkPackageOption;
+in
+{
+  options.services.alertmanager-irc-relay = {
+    enable = mkEnableOption "Alertmanager IRC relay";
+    package = mkPackageOption pkgs "alertmanager-irc-relay" { };
+    settings = mkOption {
+      type = types.attrsOf yaml.type;
+    };
+    environmentFiles = mkOption {
+      type = types.listOf types.path;
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.alertmanager-irc-relay = {
+      description = "Alertmanager IRC Relay Service";
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        ExecStart = "${lib.getExe cfg.package} --config ${configFile}";
+        Restart = "always";
+        DynamicUser = true;
+        ProtectSystem = "strict";
+        ProtectHome = true;
+        NoNewPrivileges = true;
+        EnvironmentFile = cfg.environmentFiles;
+      };
+    };
+
+    services.alertmanager-irc-relay.settings = mapAttrs (_: lib.mkDefault) {
+      http_host = "localhost";
+      http_port = 8000;
+
+      msg_once_per_alert_group = true;
+      use_privmsg = false;
+
+      msg_template = "Alert {{ .Labels.alertname }} on {{ .Labels.instance }} is {{ .Status }}";
+      alert_buffer_size = 2048;
+    };
+  };
+}
+