Custom cgit module

1 files changed, 99 insertions, 0 deletions

diff --git a/machines/srv1/cgit.nix b/machines/srv1/cgit.nix
new file mode 100644
index 0000000..5c0749c
--- /dev/null
+++ b/machines/srv1/cgit.nix
@@ -0,0 +1,99 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.lighttpd.pn-cgit;
+  pathPrefix = if stringLength cfg.subdir == 0 then "" else "/" + cfg.subdir;
+  configFile = pkgs.writeText "cgitrc"
+    ''
+      # default paths to static assets
+      css=${pathPrefix}/cgit.css
+      logo=${pathPrefix}/cgit.png
+      favicon=${pathPrefix}/favicon.ico
+      # user configuration
+      ${cfg.configText}
+    '';
+in
+{
+
+  options.services.lighttpd.pn-cgit = {
+
+    enable = mkOption {
+      default = false;
+      type = types.bool;
+      description = ''
+        If true, enable cgit (fast web interface for git repositories) as a
+        sub-service in lighttpd.
+      '';
+    };
+
+    subdir = mkOption {
+      default = "cgit";
+      example = "";
+      type = types.str;
+      description = ''
+        The subdirectory in which to serve cgit. The web application will be
+        accessible at http://yourserver/''${subdir}
+      '';
+    };
+
+    logo = mkOption {
+      default = "${pkgs.cgit}/cgit/cgit.png";
+      example = "";
+      type = types.str;
+      description = ''
+        Logo for your cgit server
+      '';
+    };
+
+    configText = mkOption {
+      default = "";
+      example = ''
+        source-filter=''${pkgs.cgit}/lib/cgit/filters/syntax-highlighting.py
+        about-filter=''${pkgs.cgit}/lib/cgit/filters/about-formatting.sh
+        cache-size=1000
+        scan-path=/srv/git
+      '';
+      type = types.lines;
+      description = ''
+        Verbatim contents of the cgit runtime configuration file. Documentation
+        (with cgitrc example file) is available in "man cgitrc". Or online:
+        http://git.zx2c4.com/cgit/tree/cgitrc.5.txt
+      '';
+    };
+
+  };
+
+  config = mkIf cfg.enable {
+
+    # make the cgitrc manpage available
+    environment.systemPackages = [ pkgs.cgit ];
+
+    # declare module dependencies
+    services.lighttpd.enableModules = [ "mod_cgi" "mod_alias" "mod_setenv" ];
+
+    services.lighttpd.extraConfig = ''
+      $HTTP["url"] =~ "^/${cfg.subdir}" {
+          cgi.assign = (
+              "cgit.cgi" => "${pkgs.cgit}/cgit/cgit.cgi"
+          )
+          alias.url = (
+              "${pathPrefix}/cgit.css" => "${pkgs.cgit}/cgit/cgit.css",
+              "${pathPrefix}/cgit.png" => "${cfg.logo}",
+              "${pathPrefix}"          => "${pkgs.cgit}/cgit/cgit.cgi"
+          )
+          setenv.add-environment = (
+              "CGIT_CONFIG" => "${configFile}"
+          )
+      }
+    '';
+
+    systemd.services.lighttpd.preStart = ''
+      mkdir -p /var/cache/cgit
+      chown lighttpd:lighttpd /var/cache/cgit
+    '';
+
+  };
+
+}