Fix crasher when we don't use -g with b4 pr

If we're not passing -g to "b4 pr -e", then we should try to see if we
are inside a git checkout and use that as our source.

Signed-off-by: Konstantin Ryabitsev <konstantin@linuxfoundation.org>

1 files changed, 1 insertions, 6 deletions

diff --git a/b4/mbox.py b/b4/mbox.py
index 200cf1c..459fb9a 100644
--- a/b4/mbox.py
+++ b/b4/mbox.py
@@ -143,12 +143,7 @@ def mbox_to_am(mboxfile, cmdargs):
             logger.critical('     Msg From: %s <%s>', fname, femail)
         logger.critical('NOTE: Rerun with -S to apply them anyway')
 
-    topdir = None
-    # Are we in a git tree and if so, what is our toplevel?
-    gitargs = ['rev-parse', '--show-toplevel']
-    lines = b4.git_get_command_lines(None, gitargs)
-    if len(lines) == 1:
-        topdir = lines[0]
+    topdir = b4.git_get_toplevel()
 
     if cmdargs.threeway:
         if not topdir: