Merge pull request #23672 from edanaher/nginx-alias

Nginx alias directive

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

@@ -185,6 +185,7 @@ let
       ${optionalString (config.index != null) "index ${config.index};"}
       ${optionalString (config.tryFiles != null) "try_files ${config.tryFiles};"}
       ${optionalString (config.root != null) "root ${config.root};"}
+      ${optionalString (config.alias != null) "alias ${config.alias};"}
       ${config.extraConfig}
     }
   '') locations);
@@ -403,6 +404,13 @@ in
   config = mkIf cfg.enable {
     # TODO: test user supplied config file pases syntax test
 
+    assertions = let hostOrAliasIsNull = l: l.root == null || l.alias == null; in [
+      {
+        assertion = all (host: all hostOrAliasIsNull (attrValues host.locations)) (attrValues virtualHosts);
+        message = "Only one of nginx root or alias can be specified on a location.";
+      }
+    ];
+
     systemd.services.nginx = {
       description = "Nginx Web Server";
       after = [ "network.target" ];

nixos/modules/services/web-servers/nginx/location-options.nix

@@ -45,6 +45,15 @@ with lib;
       '';
     };
 
+    alias = mkOption {
+      type = types.nullOr types.path;
+      default = null;
+      example = "/your/alias/directory";
+      description = ''
+        Alias directory for requests.
+      '';
+    };
+
     extraConfig = mkOption {
       type = types.lines;
       default = "";