1 files changed, 26 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/desktops/gnome/update.nix b/nixpkgs/pkgs/desktops/gnome/update.nix
new file mode 100644
index 000000000000..928eac45160a
--- /dev/null
+++ b/nixpkgs/pkgs/desktops/gnome/update.nix
@@ -0,0 +1,26 @@
+{ stdenv, pkgs, lib, writeScript, python3, common-updater-scripts }:
+{ packageName, attrPath ? packageName, versionPolicy ? "tagged", freeze ? false }:
+
+let
+  python = python3.withPackages (p: [ p.requests p.libversion ]);
+  upperBoundFlag =
+    let
+      package = lib.attrByPath (lib.splitString "." attrPath) (throw "Cannot find attribute ‘${attrPath}’.") pkgs;
+      packageVersion = lib.getVersion package;
+      versionComponents = lib.versions.splitVersion packageVersion;
+      minorVersion = lib.versions.minor packageVersion;
+      minorAvailable = builtins.length versionComponents > 1 && builtins.match "[0-9]+" minorVersion != null;
+      nextMinor = builtins.fromJSON minorVersion + 1;
+      upperBound = "${lib.versions.major packageVersion}.${builtins.toString nextMinor}";
+    in lib.optionalString (freeze && minorAvailable) ''--upper-bound="${upperBound}"'';
+  updateScript = writeScript "gnome-update-script" ''
+    #!${stdenv.shell}
+    set -o errexit
+    package_name="$1"
+    attr_path="$2"
+    version_policy="$3"
+    PATH=${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"
+  '';
+in [ updateScript packageName attrPath versionPolicy ]