hg-to-git: abort if the project directory is not a hg repo

Miklos Vajna · gitster · commit 2553ede5a9b0 · 2008-07-05T23:35:11.000-07:00
Check the exit code of the first hg command, and abort to avoid a later
ValueError exception.

Signed-off-by: Miklos Vajna &lt;vmiklos@frugalware.org&gt;
Signed-off-by: Junio C Hamano &lt;gitster@pobox.com&gt;
diff --git a/contrib/hg-to-git/hg-to-git.py b/contrib/hg-to-git/hg-to-git.py
@@ -106,7 +106,10 @@ def getgitenv(user, date):
     else:
         print 'State does not exist, first run'
 
-tip = os.popen('hg tip --template "{rev}"').read()
+sock = os.popen('hg tip --template "{rev}"')
+tip = sock.read()
+if sock.close():
+    sys.exit(1)
 if verbose:
     print 'tip is', tip
 
