[PATCH] Fix contrib/hooks/post-receive-email for new branch with no new commits

In the show_new_revisions function, the original code:

   git rev-parse --not --branches | grep -v $(git rev-parse $refname) |

isn't quite right since one can create a new branch and push it without
any new commits.  In that case, two refs will have the same sha1 but
both would get filtered by the 'grep'.  In the end, we'll show ALL the
history which is not what we want.  Instead, we should list the branches
by name and remove the branch being updated and THEN pass that list
through rev-parse.

Signed-off-by: Pat Notz <redacted>
---
 contrib/hooks/post-receive-email |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/contrib/hooks/post-receive-email b/contrib/hooks/post-receive-email
index 28a3c0e..116f89c 100644
--- a/contrib/hooks/post-receive-email
+++ b/contrib/hooks/post-receive-email

@@ -615,7 +615,9 @@ show_new_revisions()
 		revspec=$oldrev..$newrev
 	fi
 
-	git rev-parse --not --branches | grep -v $(git rev-parse $refname) |
+	this_branch=$(echo $refname | sed 's@refs/heads/@@')
+	other_branches=$(git branch | sed 's/\*//g' | grep -v $this_branch)
+	git rev-parse --not $other_branches |
 	if [ -z "$custom_showrev" ]
 	then
 		git rev-list --pretty --stdin $revspec

-- 
1.6.1.2