Add options for user and group to run nginx as.

Add option to compile in full WebDAV support.

modules/services/web-servers/nginx/default.nix

@@ -4,8 +4,9 @@ with pkgs.lib;
 
 let
   cfg = config.services.nginx;
+  nginx = pkgs.nginx.override { fullWebDAV = cfg.fullWebDAV; };
   configFile = pkgs.writeText "nginx.conf" ''
-    user nginx nginx;
+    user ${cfg.user} ${cfg.group};
     daemon off;
     ${cfg.config}
   '';
@@ -34,12 +35,27 @@ in
           Directory holding all state for nginx to run.
         ";
       };
+
+      user = mkOption {
+        default = "nginx";
+        description = "User account under which nginx runs.";
+      };
+
+      group = mkOption {
+        default = "nginx";
+        description = "Group account under which nginx runs.";
+      };
+
+      fullWebDAV = mkOption {
+        default = false;
+        description = "Compile in a third party module providing full WebDAV support";
+      };
     };
 
   };
 
   config = mkIf cfg.enable {
-    environment.systemPackages = [ pkgs.nginx ];
+    environment.systemPackages = [ nginx ];
 
     # TODO: test user supplied config file pases syntax test
 
@@ -47,14 +63,14 @@ in
       description = "Nginx Web Server";
       after = [ "network.target" ];
       wantedBy = [ "multi-user.target" ];
-      path = [ pkgs.nginx ];
+      path = [ nginx ];
       preStart =
         ''
         mkdir -p ${cfg.stateDir}/logs
-        chown -R nginx:nginx ${cfg.stateDir}
+        chown -R ${cfg.user}:${cfg.group} ${cfg.stateDir}
         '';
       serviceConfig = {
-        ExecStart = "${pkgs.nginx}/bin/nginx -c ${configFile} -p ${cfg.stateDir}";
+        ExecStart = "${nginx}/bin/nginx -c ${configFile} -p ${cfg.stateDir}";
       };
     };