1 files changed, 44 insertions, 0 deletions
diff --git a/contrib/scripts/pydiffer.py.in b/contrib/scripts/pydiffer.py.in
new file mode 100644
index 0000000000..10145371c3
--- /dev/null
+++ b/contrib/scripts/pydiffer.py.in
@@ -0,0 +1,44 @@
+#!@PYTHON@
+import os
+import sys
+import difflib
+import filecmp
+
+
+def getdiff(old, new):
+    diff = []
+    with open(old) as a:
+        with open(new) as b:
+            for l in difflib.unified_diff(a.read().splitlines(), b.read().splitlines()):
+                diff.append(l)
+    return diff
+
+
+def dc_getdiff(dc, old, new):
+    diff = []
+    for f in dc.left_only:
+        diff.append("Only in {}: {}".format(old, f))
+    for f in dc.right_only:
+        diff.append("Only in {}: {}".format(new, f))
+    for f in dc.diff_files:
+        r = getdiff(os.path.join(old, f), os.path.join(new, f))
+        diff.extend(r)
+    for dn, dc in dc.subdirs.items():
+        r = dc_getdiff(dc, os.path.join(old, dn), os.path.join(new, dn))
+        diff.extend(r)
+    return diff
+
+
+def dcdiff(old, new):
+    dc = filecmp.dircmp(old, new)
+    diff = dc_getdiff(dc, old, new)
+    return diff
+
+
+def main():
+    for l in dcdiff(sys.argv[1], sys.argv[2]):
+        print(l)
+
+
+if __name__ == '__main__':
+    main()