[PATCH] git-filter-branch could be confused by similar names

[Dmitry Potapov <dpotapov@gmail.com>]

'git-filter-branch branch' could fail producing the error:
"Which ref do you want to rewrite?" if existed another branch
or tag, which name was 'branch-something' or 'something/branch'.

Signed-off-by: Dmitry Potapov <dpotapov@gmail.com>
---

I have corrected my previous patch to allow "heads" or "tags"
in the name of a branch or tag, i.e. to write it like this:
   git filter-branch heads/master

 git-filter-branch.sh     |    2 +-
 t/t7003-filter-branch.sh |   10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletions(-)

diff --git a/git-filter-branch.sh b/git-filter-branch.sh
index dbab1a9..5de8b12 100755
--- a/git-filter-branch.sh
+++ b/git-filter-branch.sh
@@ -219,7 +219,7 @@ do
 	;;
 	*)
 		ref="$(git for-each-ref --format='%(refname)' |
-			grep /"$ref")"
+			grep '^refs/\([^/]\+/\)\?'"$ref"'$')"
 	esac
 
 	git check-ref-format "$ref" && echo "$ref"
diff --git a/t/t7003-filter-branch.sh b/t/t7003-filter-branch.sh
index 5f60b22..c3e5207 100755
--- a/t/t7003-filter-branch.sh
+++ b/t/t7003-filter-branch.sh
@@ -36,6 +36,16 @@ test_expect_success 'result is really identical' '
 	test $H = $(git rev-parse HEAD)
 '
 
+test_expect_success 'rewrite branch with similar names' '
+	git branch my &&
+	git tag my/orig &&
+	git tag my-orig &&
+	git tag orig/my &&
+	git tag orig-my &&
+	git-filter-branch my &&
+	test $H = $(git rev-parse HEAD)
+'
+
 test_expect_success 'rewrite, renaming a specific file' '
 	git-filter-branch -f --tree-filter "mv d doh || :" HEAD
 '
-- 
1.5.3.5