[PATCH v2 3/3] git-filter-branch: make the error msg when missing branch more open

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git-filter-branch requires the specification of a branch by one way or
another. If no branch appears to have been specified, we know the user
got the usage wrong but we don't know what they were trying to do ---
e.g. maybe they specified the ref to rewrite but in the wrong place.

The safest solution is to just print the usage in this case.

Signed-off-by: Jean-Noel Avila <jn.avila@xxxxxxx>
---
 git-filter-branch.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/git-filter-branch.sh b/git-filter-branch.sh
index 2b8cdba15..bda2bae23 100755
--- a/git-filter-branch.sh
+++ b/git-filter-branch.sh
@@ -239,7 +239,7 @@ git rev-parse --no-flags --revs-only --symbolic-full-name \
 sed -e '/^^/d' "$tempdir"/raw-heads >"$tempdir"/heads
 
 test -s "$tempdir"/heads ||
-	die "Which ref do you want to rewrite?"
+	usage
 
 GIT_INDEX_FILE="$(pwd)/../index"
 export GIT_INDEX_FILE
-- 
2.12.0




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