gnomeExtensions.clipboard-indicator: init at 30

Add the Clipboard Indicator GNOME Shell extension.

pkgs/desktops/gnome-3/extensions/clipboard-indicator/default.nix

···
+{ stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  name = "gnome-shell-extension-clipboard-indicator-${version}";
+  version = "30";
+
+  src = fetchFromGitHub {
+    owner = "Tudmotu";
+    repo = "gnome-shell-extension-clipboard-indicator";
+    rev = "v${version}";
+    sha256 = "1fmgmxv2y678bj0kmymkgnnglcpqk8ww053izlq46xg7s27jjdf6";
+  };
+
+  uuid = "[e-mail]";
+
+  installPhase = ''
+    mkdir -p $out/share/gnome-shell/extensions/${uuid}
+    cp -r * $out/share/gnome-shell/extensions/${uuid}
+  '';
+
+  meta = with stdenv.lib; {
+    description = "Adds a clipboard indicator to the top panel and saves clipboard history";
+    license = licenses.mit;
+    maintainers = with maintainers; [ jonafato ];
+    platforms = platforms.linux;
+    homepage = https://github.com/Tudmotu/gnome-shell-extension-clipboard-indicator;
+  };
+}

pkgs/top-level/all-packages.nix

···
   inherit (gnome3) evince;
   evolution_data_server = gnome3.evolution_data_server;
 
-  keepass = callPackage ../applications/misc/keepass { 
+  keepass = callPackage ../applications/misc/keepass {
     buildDotnetPackage = buildDotnetPackage.override { mono = mono54; };
   };
 
···
 
   gnomeExtensions = {
     caffeine = callPackage ../desktops/gnome-3/extensions/caffeine { };
+    clipboard-indicator = callPackage ../desktops/gnome-3/extensions/clipboard-indicator { };
     dash-to-dock = callPackage ../desktops/gnome-3/extensions/dash-to-dock { };
     dash-to-panel = callPackage ../desktops/gnome-3/extensions/dash-to-panel { };
     icon-hider = callPackage ../desktops/gnome-3/extensions/icon-hider { };