gnome.updateScript: Use experimental support for custom commit messages

maintainers/scripts/update.nix

@@ -147,7 +147,7 @@ let
 
     to run update script for specific package, or
 
-        % nix-shell maintainers/scripts/update.nix --arg predicate '(path: pkg: builtins.isList pkg.updateScript && builtins.length pkg.updateScript >= 1 && (let script = builtins.head pkg.updateScript; in builtins.isAttrs script && script.name == "gnome-update-script"))'
+        % nix-shell maintainers/scripts/update.nix --arg predicate '(path: pkg: pkg.updateScript.name or null == "gnome-update-script")'
 
     to run update script for all packages matching given predicate, or
 

pkgs/desktops/gnome/update.nix

@@ -3,10 +3,10 @@
 
 let
   python = python3.withPackages (p: [ p.requests p.libversion ]);
+  package = lib.attrByPath (lib.splitString "." attrPath) (throw "Cannot find attribute ‘${attrPath}’.") pkgs;
+  packageVersion = lib.getVersion package;
   upperBoundFlag =
     let
-      package = lib.attrByPath (lib.splitString "." attrPath) (throw "Cannot find attribute ‘${attrPath}’.") pkgs;
-      packageVersion = lib.getVersion package;
       versionComponents = lib.versions.splitVersion packageVersion;
       minorVersion = lib.versions.minor packageVersion;
       minorAvailable = builtins.length versionComponents > 1 && builtins.match "[0-9]+" minorVersion != null;
@@ -16,11 +16,19 @@ let
   updateScript = writeScript "gnome-update-script" ''
     #!${stdenv.shell}
     set -o errexit
-    package_name="$1"
-    attr_path="$2"
-    version_policy="$3"
+    attr_path="$1"
+    package_name="$2"
+    package_version="$3"
+    version_policy="$4"
     PATH=${lib.makeBinPath [ common-updater-scripts python ]}
     latest_tag=$(python "${./find-latest-version.py}" "$package_name" "$version_policy" "stable" ${upperBoundFlag})
     update-source-version "$attr_path" "$latest_tag"
+    echo '[ { "commitBody": "https://gitlab.gnome.org/GNOME/'$package_name'/-/compare/'$package_version'...'$latest_tag'" } ]'
   '';
-in [ updateScript packageName attrPath versionPolicy ]
+in {
+  name = "gnome-update-script";
+  command = [ updateScript attrPath packageName packageVersion versionPolicy ];
+  supportedFeatures = [
+    "commit"
+  ];
+}