xpra: add update script

pkgs/tools/X11/xpra/default.nix

@@ -110,7 +110,10 @@ in buildPythonApplication rec {
 
   enableParallelBuilding = true;
 
-  passthru = { inherit xf86videodummy; };
+  passthru = {
+    inherit xf86videodummy;
+    updateScript = ./update.sh;
+  };
 
   meta = {
     homepage = "http://xpra.org/";

pkgs/tools/X11/xpra/update.sh

@@ -0,0 +1,5 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p curl perl common-updater-scripts
+
+version=$(curl https://xpra.org/src/ | perl -ne 'print "$1\n" if /xpra-([[:digit:].]+)\./' | sort -V | tail -n1)
+update-source-version xpra "$version"