From d44e71261f91d3cc81293e0976bb40daa8abb583 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Santi=20B=C3=A9jar?= <santi@agolina.net>
Date: Sun, 19 Jul 2009 09:45:16 +0200
Subject: pull: support rebased upstream + fetch + pull --rebase
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You cannot do a "git pull --rebase" with a rebased upstream, if you have
already run "git fetch".  Try to behave as if the "git fetch" was not run.

In other words, find the fork point of the current branch, where
the tip of upstream branch used to be, and use it as the upstream
parameter of "git rebase".

This patch computes the fork point by walking the reflog to find the first
commit which is an ancestor of the current branch.  Maybe there are
smarter ways to compute it, but this is a straight forward implementation.

Signed-off-by: Santi Béjar <santi@agolina.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/git-pull.sh b/git-pull.sh
index 4b78a0c..0f24182 100755
--- a/git-pull.sh
+++ b/git-pull.sh
@@ -124,10 +124,18 @@ test true = "$rebase" && {
 	git diff-index --ignore-submodules --cached --quiet HEAD -- ||
 	die "refusing to pull with rebase: your working tree is not up-to-date"
 
+	oldremoteref= &&
 	. git-parse-remote &&
-	reflist="$(get_remote_merge_branch "$@" 2>/dev/null)" &&
-	oldremoteref="$(git rev-parse -q --verify \
-		"$reflist")"
+	remoteref="$(get_remote_merge_branch "$@" 2>/dev/null)" &&
+	oldremoteref="$(git rev-parse -q --verify "$remoteref")" &&
+	for reflog in $(git rev-list -g $remoteref 2>/dev/null)
+	do
+		if test "$reflog" = "$(git merge-base $reflog $curr_branch)"
+		then
+			oldremoteref="$reflog"
+			break
+		fi
+	done
 }
 orig_head=$(git rev-parse -q --verify HEAD)
 git fetch $verbosity --update-head-ok "$@" || exit 1
diff --git a/t/t5520-pull.sh b/t/t5520-pull.sh
index 3ebc886..e78d402 100755
--- a/t/t5520-pull.sh
+++ b/t/t5520-pull.sh
@@ -117,15 +117,14 @@ test_expect_success '--rebase with rebased default upstream' '
 
 '
 
-test_expect_failure 'rebased upstream + fetch + pull --rebase' '
+test_expect_success 'rebased upstream + fetch + pull --rebase' '
 
 	git update-ref refs/remotes/me/copy copy-orig &&
 	git reset --hard to-rebase-orig &&
 	git checkout --track -b to-rebase3 me/copy &&
 	git reset --hard to-rebase-orig &&
 	git fetch &&
-	test_must_fail git pull --rebase &&
-	git rebase --abort &&
+	git pull --rebase &&
 	test "conflicting modification" = "$(cat file)" &&
 	test file = "$(cat file2)"
 
-- 
cgit v0.10.2-6-g49f6