gnome3: only maintain single GNOME 3 package set (#29397)

* gnome3: only maintain single GNOME 3 package set

GNOME 3 was split into 3.10 and 3.12 in #2694. Unfortunately, we barely have the resources
to update a single version of GNOME. Maintaining multiple versions just does not make sense.
Additionally, it makes viewing history using most Git tools bothersome.

This commit renames `pkgs/desktops/gnome-3/3.24` to `pkgs/desktops/gnome-3`, removes
the config variable for choosing packageset (`environment.gnome3.packageSet`), updates
the hint in maintainer script, and removes the `gnome3_24` derivation from `all-packages.nix`.

Closes: #29329

* maintainers/scripts/gnome: Use fixed GNOME 3 directory

Since we now allow only a single GNOME 3 package set, specifying
the working directory is not necessary.

This commit sets the directory to `pkgs/desktops/gnome-3`.

2 files changed, 25 insertions, 0 deletions

diff --git a/pkgs/desktops/gnome-3/devtools/gdl/default.nix b/pkgs/desktops/gnome-3/devtools/gdl/default.nix
new file mode 100644
index 000000000000..156d91b3eae7
--- /dev/null
+++ b/pkgs/desktops/gnome-3/devtools/gdl/default.nix
@@ -0,0 +1,15 @@
+{ stdenv, fetchurl, pkgconfig, libxml2, gtk3, gnome3, intltool }:
+
+stdenv.mkDerivation rec {
+  inherit (import ./src.nix fetchurl) name src;
+
+  buildInputs = [ pkgconfig libxml2 gtk3 intltool ];
+
+  meta = with stdenv.lib; {
+    description = "Gnome docking library";
+    homepage = https://developer.gnome.org/gdl/;
+    maintainers = gnome3.maintainers;
+    license = licenses.gpl2;
+    platforms = platforms.linux;
+  };
+}
diff --git a/pkgs/desktops/gnome-3/devtools/gdl/src.nix b/pkgs/desktops/gnome-3/devtools/gdl/src.nix
new file mode 100644
index 000000000000..c8b65884e082
--- /dev/null
+++ b/pkgs/desktops/gnome-3/devtools/gdl/src.nix
@@ -0,0 +1,10 @@
+# Autogenerated by maintainers/scripts/gnome.sh update
+
+fetchurl: {
+  name = "gdl-3.22.0";
+
+  src = fetchurl {
+    url = mirror://gnome/sources/gdl/3.22/gdl-3.22.0.tar.xz;
+    sha256 = "cc5b360e1392292186924f0f9a8efc0f4db7e6e56dc7042037466b5cc839660c";
+  };
+}