From 2cc12dd1e867b34569924d6008972b98ffe353f9 Mon Sep 17 00:00:00 2001
From: Stephen Haberman <stephen@exigencecorp.com>
Date: Wed, 24 Sep 2008 14:13:01 -0500
Subject: [PATCH] Reproduce and fix with gc-pull the merge replay problem.

---
 client/post-checkout-rebase |  6 ++--
 scripts/gc-pull             | 19 +++++++---
 scripts/gc-push             |  8 ++++-
 tests/t5200-script-pull.sh  | 69 +++++++++++++++++--------------------
 4 files changed, 56 insertions(+), 46 deletions(-)

diff --git a/client/post-checkout-rebase b/client/post-checkout-rebase
index 40ee523..a0fc533 100644
--- a/client/post-checkout-rebase
+++ b/client/post-checkout-rebase
@@ -5,14 +5,14 @@
 # whether the checkout was a branch checkout (changing branches, flag=1) or a
 # file checkout (retrieving a file from the index, flag=0).
 
-branch=$(git symbolic-ref --quiet HEAD)
-if [ $? -ne 0 ] ; then
+branch=$(git symbolic-ref HEAD 2>/dev/null)
+if [[ $? -ne 0 ]] ; then
 	exit 0
 fi
 
 branch=${branch/refs\/heads\//}
+
 git config --list | grep "branch.${branch}.rebase" > /dev/null
 if [ $? -ne 0 ] ; then
 	git config --add "branch.${branch}.rebase" true
 fi
-
diff --git a/scripts/gc-pull b/scripts/gc-pull
index 1844725..fcde7b9 100644
--- a/scripts/gc-pull
+++ b/scripts/gc-pull
@@ -1,7 +1,18 @@
 #!/bin/sh
+#!/bin/sh
+
+branch_name=$(git symbolic-ref --quiet HEAD)
+if [[ $? -ne 0 ]] ; then
+	echo "not on a branch"
+	exit 1
+fi
+
+branch_name=${branch_name/refs\/heads\//}
+
+git fetch
+if [[ $? -ne 0 ]] ; then
+	exit $?
+fi
 
-#
-# Note: we should use `git pull --rebase origin <branch>`?
-#
-git pull --rebase $*
+GIT_EDITOR=: git rebase -p -i "origin/$branch_name"
 
diff --git a/scripts/gc-push b/scripts/gc-push
index 32952b1..4e72fe5 100644
--- a/scripts/gc-push
+++ b/scripts/gc-push
@@ -1,6 +1,12 @@
 #!/bin/sh
 
-branch_name=$(git-symbolic-ref HEAD)
+branch_name=$(git symbolic-ref --quiet HEAD)
+if [[ $? -ne 0 ]] ; then
+	echo "not on a branch"
+	exit 1
+fi
+
+branch_name=${branch_name/refs\/heads\//}
 
 git push origin $branch_name
 if [[ $? -ne 0 ]] ; then
diff --git a/tests/t5200-script-pull.sh b/tests/t5200-script-pull.sh
index 3bfd5e4..39e660d 100644
--- a/tests/t5200-script-pull.sh
+++ b/tests/t5200-script-pull.sh
@@ -32,46 +32,39 @@ test_expect_success 'pull does a rebase' '
 
 	# Only one parent
 	gc-pull &&
-	git cat-file commit $(git rev-parse HEAD) | grep parent | wc -l | grep 1
+	test 1 = $(git cat-file commit $(git rev-parse HEAD) | grep parent | wc -l)
 '
 
-#test_expect_success 'pull does a rebase but does not fuck up merges' '
-#	# Change "a" itself so we will eventually conflict
-#	gc-checkout topic2 &&
-#	echo "$test_name on topic2" >a &&
-#	git commit -a -m "move topic2" &&
-#
-#	# Change a.topic2 as well for another commit to continue rebasing after fixing the conflict
-#	echo "$test_name on topic2" >a.topic2 &&
-#	git add a.topic2 &&
-#	git commit -m "move a.topic2" &&
-#
-#	# Move stable
-#	git checkout stable &&
-#	echo "$test_name on stable" >a &&
-#	git commit -a -m "move stable" &&
-#	git push origin stable &&
-#
-#	# Move topic2 on the server, then merge stable
-#	cd server &&
-#	git checkout stable &&
-#	echo "$test_name on stable server" >a.stable.server &&
-#	git add a.stable.server &&
-#	git commit -m "move stable server" &&
-#	git checkout topic2 &&
-#	echo "$test_name" >a.topic2.server &&
-#	git add a.topic2.server &&
-#	git commit -m "move topic2 on the server" &&
-#	git merge stable &&
-#	cd .. &&
-#
-#	# Merge stable locally too--should conflict
-#	git checkout topic2 &&
-#	git merge origin/stable
-#
-#	# Now pull and see what happens
-#	# gc-pull
-#'
+test_expect_success 'pull does a rebase but does not fuck up merges' '
+	gc-checkout topic2 &&
+	echo "$test_name on topic2" >a.topic2 &&
+	git add a.topic2 &&
+	git commit -a -m "create topic2" &&
+	git push origin topic2 &&
+
+	# Move stable
+	git checkout stable &&
+	echo "$test_name on stable" >a &&
+	git commit -a -m "move stable that will not be replayed" &&
+	git push origin stable &&
+
+	# And merge stable into topic2
+	git checkout topic2 &&
+	git merge stable &&
+
+	# Move topic2 on the server
+	cd server &&
+	git checkout topic2 &&
+	echo "$test_name" >a.topic2.server &&
+	git add a.topic2.server &&
+	git commit -m "move topic2 on the server" &&
+	cd .. &&
+
+	# Merge stable locally too--should conflict
+	git checkout topic2 &&
+	gc-pull &&
+	test 1 = $(git rev-list --all --pretty=oneline | grep "replayed" | wc -l)
+'
 
 test_done
 
-- 
2.39.5