video/mirakurun: add module

nixos/modules/module-list.nix

@@ -837,6 +837,7 @@
   ./services/ttys/gpm.nix
   ./services/ttys/kmscon.nix
   ./services/wayland/cage.nix
+  ./services/video/mirakurun.nix
   ./services/web-apps/atlassian/confluence.nix
   ./services/web-apps/atlassian/crowd.nix
   ./services/web-apps/atlassian/jira.nix

nixos/modules/services/video/mirakurun.nix

@@ -0,0 +1,165 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.mirakurun;
+  mirakurun = pkgs.mirakurun;
+  username = config.users.users.mirakurun.name;
+  groupname = config.users.users.mirakurun.group;
+  settingsFmt = pkgs.formats.yaml {};
+in
+  {
+    options = {
+      services.mirakurun = {
+        enable = mkEnableOption mirakurun.meta.description;
+
+        port = mkOption {
+          type = with types; nullOr port;
+          default = 40772;
+          description = ''
+            Port to listen on. If null, it won't listen on any port.
+          '';
+        };
+
+        openFirewall = mkOption {
+          type = types.bool;
+          default = false;
+          description = ''
+            Open ports in the firewall for Mirakurun.
+          '';
+        };
+
+        serverSettings = mkOption {
+          type = settingsFmt.type;
+          default = {};
+          example = literalExample ''
+            {
+              highWaterMark = 25165824;
+              overflowTimeLimit = 30000;
+            };
+          '';
+          description = ''
+            Options for server.yml.
+
+            Documentation:
+            <link xlink:href="https://github.com/Chinachu/Mirakurun/blob/master/doc/Configuration.md"/>
+          '';
+        };
+
+        tunerSettings = mkOption {
+          type = with types; nullOr settingsFmt.type;
+          default = null;
+          example = literalExample ''
+            [
+              {
+                name = "tuner-name";
+                types = [ "GR" "BS" "CS" "SKY" ];
+                dvbDevicePath = "/dev/dvb/adapterX/dvrX";
+              }
+            ];
+          '';
+          description = ''
+            Options which are added to tuners.yml. If none is specified, it will
+            automatically be generated at runtime.
+
+            Documentation:
+            <link xlink:href="https://github.com/Chinachu/Mirakurun/blob/master/doc/Configuration.md"/>
+          '';
+        };
+
+        channelSettings = mkOption {
+          type = with types; nullOr settingsFmt.type;
+          default = null;
+          example = literalExample ''
+            [
+              {
+                name = "channel";
+                types = "GR";
+                channel = "0";
+              }
+            ];
+          '';
+          description = ''
+            Options which are added to channels.yml. If none is specified, it
+            will automatically be generated at runtime.
+
+            Documentation:
+            <link xlink:href="https://github.com/Chinachu/Mirakurun/blob/master/doc/Configuration.md"/>
+          '';
+        };
+      };
+    };
+
+    config = mkIf cfg.enable {
+      environment.systemPackages = [ mirakurun ];
+      environment.etc = {
+        "mirakurun/server.yml".source = settingsFmt.generate "server.yml" cfg.serverSettings;
+        "mirakurun/tuners.yml" = mkIf (cfg.tunerSettings != null) {
+          source = settingsFmt.generate "tuners.yml" cfg.tunerSettings;
+          mode = "0644";
+          user = username;
+          group = groupname;
+        };
+        "mirakurun/channels.yml" = mkIf (cfg.channelSettings != null) {
+          source = settingsFmt.generate "channels.yml" cfg.channelSettings;
+          mode = "0644";
+          user = username;
+          group = groupname;
+        };
+      };
+
+      networking.firewall = mkIf cfg.openFirewall {
+        allowedTCPPorts = mkIf (cfg.port != null) [ cfg.port ];
+      };
+
+      users.users.mirakurun = {
+        description = "Mirakurun user";
+        group = "video";
+        isSystemUser = true;
+      };
+
+      services.mirakurun.serverSettings = {
+        logLevel = mkDefault 2;
+        path = mkDefault "/var/run/mirakurun/mirakurun.sock";
+        port = mkIf (cfg.port != null) (mkDefault cfg.port);
+      };
+
+      systemd.tmpfiles.rules = [
+        "d '/etc/mirakurun' - ${username} ${groupname} - -"
+      ];
+
+      systemd.services.mirakurun = {
+        description = mirakurun.meta.description;
+        wantedBy = [ "multi-user.target" ];
+        after = [ "network.target" ];
+        serviceConfig = {
+          ExecStart = "${mirakurun}/bin/mirakurun";
+          User = username;
+          Group = groupname;
+          RuntimeDirectory="mirakurun";
+          StateDirectory="mirakurun";
+          Nice = -10;
+          IOSchedulingClass = "realtime";
+          IOSchedulingPriority = 7;
+        };
+
+        environment = {
+          SERVER_CONFIG_PATH = "/etc/mirakurun/server.yml";
+          TUNERS_CONFIG_PATH = "/etc/mirakurun/tuners.yml";
+          CHANNELS_CONFIG_PATH = "/etc/mirakurun/channels.yml";
+          SERVICES_DB_PATH = "/var/lib/mirakurun/services.json";
+          PROGRAMS_DB_PATH = "/var/lib/mirakurun/programs.json";
+          NODE_ENV = "production";
+        };
+
+        restartTriggers = let
+          getconf = target: config.environment.etc."mirakurun/${target}.yml".source;
+          targets = [
+            "server"
+          ] ++ optional (cfg.tunerSettings != null) "tuners"
+            ++ optional (cfg.channelSettings != null) "channels";
+        in (map getconf targets);
+      };
+    };
+  }