From 925ecb0cac1bdbe64a3641ae5cd711c93bed1025 Mon Sep 17 00:00:00 2001
From: Stephen Haberman <stephen@exigencecorp.com>
Date: Sat, 23 Aug 2008 22:43:46 -0500
Subject: [PATCH] Use rev-parse so gc-checkout recognizes more than just branch
 names.

---
 scripts/gc-checkout            | 31 ++++++++++++++++---------------
 tests/t5000-script-checkout.sh |  9 +++++++++
 2 files changed, 25 insertions(+), 15 deletions(-)

diff --git a/scripts/gc-checkout b/scripts/gc-checkout
index b8c5ee9..3a112c5 100644
--- a/scripts/gc-checkout
+++ b/scripts/gc-checkout
@@ -1,27 +1,28 @@
 #!/bin/sh
 
 branch_name=$1
-exists_local=$(git branch | grep -x "  $branch_name" | wc -l)
-exists_remote=$(git branch | grep -x "  origin/$branch_name" | wc -l)
 
-if [[ $exists_remote -eq 0 ]] ; then
-	# Make sure we have the latest origin/stable to branch
-	git fetch
-	# Specifying stable to get the last released code
-	git checkout -b "$branch_name" origin/stable
-	# Go ahead and put the branch out on the server
-	git push origin "$branch_name"
-	# Setup the merge property so that pulls come from the right place (instead of stable)
-	git config --replace-all "branch.$branch_name.merge" "refs/heads/$branch_name"
+# See if it already exists
+git rev-parse $branch_name >/dev/null
+if [[ $? -eq 0 ]] ; then
+	# Just checkout what they asked
+	git checkout "$branch_name"
 else
-	if [[ $exists_local -eq 0 ]] ; then
+	exists_remote=$(git branch | grep -x "  origin/$branch_name" | wc -l)
+	if [[ $exists_remote -eq 0 ]] ; then
+		# Make sure we have the latest origin/stable to branch
+		git fetch
+		# Specifying stable to get the last released code
+		git checkout -b "$branch_name" origin/stable
+		# Go ahead and put the branch out on the server
+		git push origin "$branch_name"
+		# Setup the merge property so that pulls come from the right place (instead of stable)
+		git config --replace-all "branch.$branch_name.merge" "refs/heads/$branch_name"
+	else
 		# Make sure we have the latest origin/$branch_name to branch
 		git fetch
 		# Do the checkout
 		git checkout -b "$branch_name" "origin/$branch_name"
-	else
-		# Just checkout
-		git checkout "$branch_name"
 	fi
 fi
 
diff --git a/tests/t5000-script-checkout.sh b/tests/t5000-script-checkout.sh
index 56fb794..f162189 100644
--- a/tests/t5000-script-checkout.sh
+++ b/tests/t5000-script-checkout.sh
@@ -41,5 +41,14 @@ test_expect_success 'checkout an existing local branch' '
 	gc-checkout topic1
 '
 
+test_expect_success 'checkout a revision does not create a new branch' '
+	echo "$test_name" >a &&
+	git commit -a -m "$test_name" &&
+
+	prior=$(git rev-parse HEAD^) &&
+	gc-checkout $prior &&
+	git branch | grep "no branch"
+'
+
 test_done
 
-- 
2.20.1