Add a separate script to plot patchset dependency graph.

staging/patchgraph.py

@@ -0,0 +1,39 @@
+#!/usr/bin/python2
+# -*- coding: utf-8 -*-
+#
+# Plot dependency graph for Staging patches.
+#
+# Copyright (C) 2017 Sebastian Lackner
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+#
+
+from patchupdate import load_patchsets
+from graphviz import Digraph
+import os
+
+if __name__ == '__main__':
+    tools_directory = os.path.dirname(os.path.realpath(__file__))
+    os.chdir(os.path.join(tools_directory, "./.."))
+
+    all_patches = load_patchsets()
+    graph = Digraph(comment='Patch dependencies')
+
+    for i, patch in all_patches.iteritems():
+        if patch.disabled: continue
+        for j in patch.depends:
+            graph.edge(patch.name, all_patches[j].name)
+
+    graph.render(view=True)