Use Python batteries in fs_rec test

1 files changed, 39 insertions, 0 deletions

diff --git a/contrib/pydiffer.py.in b/contrib/pydiffer.py.in
new file mode 100644
index 000000000..23d546b25
--- /dev/null
+++ b/contrib/pydiffer.py.in
@@ -0,0 +1,39 @@
+#!@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 ()