From 624fe50512148f265cfde87b883486091bb0045a Mon Sep 17 00:00:00 2001
From: Stephen Haberman <stephen@exigencecorp.com>
Date: Tue, 30 Sep 2008 11:34:47 -0500
Subject: [PATCH] Fix update-stable for 0-commit branches.

---
 server/update-stable                          | 34 +++++--------------
 tests/t2102-server-update-stable-candidate.sh | 16 ++-------
 2 files changed, 11 insertions(+), 39 deletions(-)

diff --git a/server/update-stable b/server/update-stable
index a8768c0..7caf865 100644
--- a/server/update-stable
+++ b/server/update-stable
@@ -40,8 +40,8 @@
 # would insinuate qa didn't happen on the merged result).
 #
 # Also, we want to enforce that C does not actually introduce
-# any diffs to the files between B and C--otherwise this changes
-# would not have appeared in QA.
+# any diffs to the files between B and C--as they would be changes
+# that QA does not see.
 #
 
 . $(dirname $0)/functions
@@ -64,31 +64,11 @@ if [ "$change_type" == "delete" ] ; then
 	exit 0
 fi
 
-if [ "$change_type" == "create" -a "$short_refname" != "stable" ] ; then
-	not_on_stable=$(git rev-list stable..$newrev)
-	if [ "$not_on_stable" == "" ] ; then
-		display_error_message "Creating a branch must include new commits"
-		exit 1
-	fi
-fi
-
 # create/delete is okay
 if [ "$change_type" != "update" ] ; then
 	exit 0
 fi
 
-# # The tip must always be new
-# already=$(git branch --contains "$newrev")
-# if [ "$already" != "" ] ; then
-#	already=${already##  }
-#	echo "----------------------------------------------------"
-#	echo
-#	echo "$short_refname is already referred to by $already"
-#	echo
-#	echo "----------------------------------------------------"
-#	exit 1
-#fi
-
 if [ "$short_refname" == "stable" ] ; then
 	# Stable enforcement
 
@@ -122,10 +102,14 @@ if [ "$short_refname" == "stable" ] ; then
 	fi
 else
 	# Check if candidate/topic is already in stable
-	git branch --contains "$oldrev" | grep stable >/dev/null
+	git branch --contains "$oldrev" | grep --quiet stable
 	if [ $? -eq 0 ] ; then
-		display_error_message "$short_refname has been merged into stable"
-		exit 1
+		# Okay, it's in stable...but was it previously just a 0-commit initial banch?
+		git rev-list --first-parent stable | grep --quiet "$oldrev"
+		if [ $? -ne 0 ] ; then
+			display_error_message "$short_refname has been merged into stable"
+			exit 1
+		fi
 	fi
 
 	# For now candidates can mix amongst each other so early exit
diff --git a/tests/t2102-server-update-stable-candidate.sh b/tests/t2102-server-update-stable-candidate.sh
index cf891bf..b36dd1f 100644
--- a/tests/t2102-server-update-stable-candidate.sh
+++ b/tests/t2102-server-update-stable-candidate.sh
@@ -86,10 +86,9 @@ test_expect_success 'topic1 cannot be changed' '
 	git reset --hard HEAD^
 '
 
-test_expect_success 'topic3 cannot initially be created on stable' '
+test_expect_success 'topic3 can initially be created on stable and then moved' '
 	git checkout -b topic3 stable &&
-	! git push origin topic3 2>push.err &&
-	cat push.err | grep "Creating a branch must include new commits" &&
+	git push origin topic3 &&
 
 	echo "$test_name" >a.topic3 &&
 	git add a.topic3 &&
@@ -97,16 +96,5 @@ test_expect_success 'topic3 cannot initially be created on stable' '
 	git push origin topic3
 '
 
-test_expect_failure 'topic4 cannot point to the same place as topic4' '
-	git checkout -b topic4 topic3 &&
-	echo "$test_name" >a.topic4 &&
-	git add a.topic4 &&
-	git commit -m "making topic4" &&
-	git push origin topic4 &&
-
-	! git push origin topic4:topic3 2>push.err &&
-	cat push.err | grep "topic3 is already referred to by topic4"
-'
-
 test_done
 
-- 
2.39.5