[scripts] commit-to-changelog fails if git is too old

We need a git that supports the %B format specifier, which seems to be
1.7.2.  Fail if it's not supported.

diff --git a/scripts/commits-to-changelog.py b/scripts/commits-to-changelog.py
index 744528fffb1f673cdbdd496465224976af86b334..3de40bbe51ad1dc82fc584ae43f488955b348192 100755 (executable)
--- a/scripts/commits-to-changelog.py
+++ b/scripts/commits-to-changelog.py
@@ -247,6 +247,12 @@ def main ():
         global path_to_root
         path_to_root = options.root + "/"
 
+    #see if git supports %B in --format
+    output = git ("log", "-n1", "--format=%B", "HEAD")
+    if output.startswith ("%B"):
+        print >> sys.stderr, "Error: git doesn't support %B in --format - install version 1.7.2 or newer"
+        exit (1)
+
     for filename in git ("ls-tree", "-r", "--name-only", "HEAD").splitlines ():
         if re.search ("(^|/)Change[Ll]og$", filename):
             (path, name) = os.path.split (filename)