pkgs/den-update-script: init

pkgs/by-name/de/den-update-script/package.nix

@@ -0,0 +1,39 @@
+{
+  lib,
+  path,
+
+  overlayAttrname ? "den-outputs",
+}:
+
+assert lib.assertMsg (!lib.hasInfix "." overlayAttrname) (lib.pipe ''
+  overlayAttrname must not contain a dot (.),
+  because dot is used to reference package in a package set
+  inside nix-update-script.
+'' [
+  lib.lines
+  (lib.concatStringsSep " ")
+]);
+
+let
+  updateScript = import (path + /maintainers/scripts/update.nix);
+  functionArgs = lib.functionArgs updateScript;
+  nameInFunctionArgs = name: lib.elem name (lib.attrNames functionArgs);
+in
+{
+  __functionArgs = functionArgs // { packages = false; };
+  __functor = _: args: let
+    # args.outputs should be an attrset of packages to update
+    overlay = _: _: {
+      "${overlayAttrname}" = args.packages;
+    };
+  in updateScript (lib.filterAttrs (name: _: nameInFunctionArgs name) args // {
+    include-overlays =
+      if !args ? updateScript then [ overlay ]
+      else if lib.isList args.updateScript then [ overlay ] ++ args.updateScript
+      else args.updateScript;
+  } // lib.optionalAttrs (args ? package) {
+    package = "${overlayAttrname}.${args.package}";
+  } // lib.optionalAttrs (args ? path) {
+    path = if lib.stringLength args.path == 0 then overlayAttrname else "${overlayAttrname}.${args.path}";
+  });
+}