From abc02670169cee9541793a86324a014272ca8ed5 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <junkio@cox.net>
Date: Wed, 28 Jun 2006 11:47:28 -0700
Subject: checkout -m: fix read-tree invocation

When we updated "read-tree -m -u" to be careful about not
removing untracked working tree files, we broke "checkout -m" to
switch between branches.

Signed-off-by: Junio C Hamano <junkio@cox.net>
---
 t/t7201-co.sh | 72 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100755 t/t7201-co.sh

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
new file mode 100755
index 0000000000..b64e8b7d77
--- /dev/null
+++ b/t/t7201-co.sh
@@ -0,0 +1,72 @@
+#!/bin/sh
+#
+# Copyright (c) 2006 Junio C Hamano
+#
+
+test_description='git-checkout tests.'
+
+. ./test-lib.sh
+
+fill () {
+	for i
+	do
+		echo "$i"
+	done
+}
+
+test_expect_success setup '
+
+	fill 1 2 3 4 5 >one &&
+	fill a b c d e >two &&
+	git add one two &&
+	git commit -m "Initial A one, A two" &&
+
+	git checkout -b side &&
+	fill 1 2 3 >one &&
+	fill A B C D E >three &&
+	rm -f two &&
+	git update-index --add --remove one two three &&
+	git commit -m "Side M one, D two, A three" &&
+
+	git checkout master
+'
+
+test_expect_success "checkout with dirty tree without -m" '
+
+	fill 0 1 2 3 4 5 >one &&
+	if git checkout side
+	then
+		echo Not happy
+		false
+	else
+		echo "happy - failed correctly"
+	fi
+
+'
+
+test_expect_success "checkout -m with dirty tree" '
+
+	git checkout -f master &&
+	git clean &&
+
+	fill 0 1 2 3 4 5 >one &&
+	git checkout -m side &&
+
+	fill "  master" "* side" >expect.branch &&
+	git branch >current.branch &&
+	diff expect.branch current.branch &&
+
+	fill "M	one" "A	three" "D	two" >expect.master &&
+	git diff --name-status master >current.master &&
+	diff expect.master current.master &&
+
+	fill "M	one" >expect.side &&
+	git diff --name-status side >current.side &&
+	diff expect.side current.side &&
+
+	: >expect.index &&
+	git diff --cached >current.index &&
+	diff expect.index current.index
+'
+
+test_done
-- 
cgit v1.2.3


From 5a03e7f25334a6bf1dbbfdb9830d41de5b8f0d7f Mon Sep 17 00:00:00 2001
From: Shawn Pearce <spearce@spearce.org>
Date: Mon, 25 Sep 2006 01:24:38 -0400
Subject: Allow git-checkout when on a non-existant branch.

I've seen some users get into situtations where their HEAD
symbolic-ref is pointing at a non-existant ref.  (Sometimes this
happens during clone when the remote repository lacks a 'master'
branch.)  If this happens the user is unable to use git-checkout
to switch branches as there is no prior commit to merge from.

So instead of giving the user low-level errors about how HEAD
can't be resolved and how not a single revision was given change
the type of checkout to be a force and go through with the user's
request anyway.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
---
 t/t7201-co.sh | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index b64e8b7d77..085d4a096b 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -31,6 +31,15 @@ test_expect_success setup '
 	git checkout master
 '
 
+test_expect_success "checkout from non-existing branch" '
+
+	git checkout -b delete-me master &&
+	rm .git/refs/heads/delete-me &&
+	test refs/heads/delete-me = "$(git symbolic-ref HEAD)" &&
+	git checkout master &&
+	test refs/heads/master = "$(git symbolic-ref HEAD)"
+'
+
 test_expect_success "checkout with dirty tree without -m" '
 
 	fill 0 1 2 3 4 5 >one &&
-- 
cgit v1.2.3


From c1a4278ee3f99ca9db94bd032b047b3d19ac6e5f Mon Sep 17 00:00:00 2001
From: Junio C Hamano <junkio@cox.net>
Date: Tue, 16 Jan 2007 20:46:39 -0800
Subject: Use merge-recursive in git-checkout -m (branch switching)

This allows "git checkout -m <other-branch>" to notice renames and
carry local changes in the working tree forward.

Signed-off-by: Junio C Hamano <junkio@cox.net>
---
 t/t7201-co.sh | 41 +++++++++++++++++++++++++++++++++--------
 1 file changed, 33 insertions(+), 8 deletions(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 085d4a096b..315fa3564c 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -14,15 +14,23 @@ fill () {
 	done
 }
 
+
 test_expect_success setup '
 
-	fill 1 2 3 4 5 >one &&
+	fill 1 2 3 4 5 6 7 8 >one &&
 	fill a b c d e >two &&
 	git add one two &&
 	git commit -m "Initial A one, A two" &&
 
-	git checkout -b side &&
-	fill 1 2 3 >one &&
+	git checkout -b renamer &&
+	rm -f one &&
+	fill 1 3 4 5 6 7 8 >uno &&
+	git add uno &&
+	fill a b c d e f >two &&
+	git commit -a -m "Renamer R one->uno, M two" &&
+
+	git checkout -b side master &&
+	fill 1 2 3 4 5 6 7 >one &&
 	fill A B C D E >three &&
 	rm -f two &&
 	git update-index --add --remove one two three &&
@@ -42,7 +50,7 @@ test_expect_success "checkout from non-existing branch" '
 
 test_expect_success "checkout with dirty tree without -m" '
 
-	fill 0 1 2 3 4 5 >one &&
+	fill 0 1 2 3 4 5 6 7 8 >one &&
 	if git checkout side
 	then
 		echo Not happy
@@ -58,12 +66,10 @@ test_expect_success "checkout -m with dirty tree" '
 	git checkout -f master &&
 	git clean &&
 
-	fill 0 1 2 3 4 5 >one &&
+	fill 0 1 2 3 4 5 6 7 8 >one &&
 	git checkout -m side &&
 
-	fill "  master" "* side" >expect.branch &&
-	git branch >current.branch &&
-	diff expect.branch current.branch &&
+	test "$(git symbolic-ref HEAD)" = "refs/heads/side" &&
 
 	fill "M	one" "A	three" "D	two" >expect.master &&
 	git diff --name-status master >current.master &&
@@ -78,4 +84,23 @@ test_expect_success "checkout -m with dirty tree" '
 	diff expect.index current.index
 '
 
+test_expect_success "checkout -m with dirty tree, renamed" '
+
+	git checkout -f master && git clean &&
+
+	fill 1 2 3 4 5 7 8 >one &&
+	if git checkout renamer
+	then
+		echo Not happy
+		false
+	else
+		echo "happy - failed correctly"
+	fi &&
+
+	git checkout -m renamer &&
+	fill 1 3 4 5 7 8 >expect &&
+	diff expect uno &&
+	! test -f one
+'
+
 test_done
-- 
cgit v1.2.3


From d7ebd53d371153f7a61c0fe9f384c9662b751bf6 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <junkio@cox.net>
Date: Tue, 23 Jan 2007 16:51:22 -0800
Subject: git-checkout -m: fix merge case

Commit c1a4278e switched the "merging checkout" implementation
from 3-way read-tree to merge-recursive, but forgot that
merge-recursive will signal an unmerged state with its own exit
status code.  This prevented the clean-up phase (paths cleanly
merged should not be updated in the index) from running.

Signed-off-by: Junio C Hamano <junkio@cox.net>
---
 t/t7201-co.sh | 28 +++++++++++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 315fa3564c..867bbd26cb 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -100,7 +100,33 @@ test_expect_success "checkout -m with dirty tree, renamed" '
 	git checkout -m renamer &&
 	fill 1 3 4 5 7 8 >expect &&
 	diff expect uno &&
-	! test -f one
+	! test -f one &&
+	git diff --cached >current &&
+	! test -s current
+
+'
+
+test_expect_success 'checkout -m with merge conflict' '
+
+	git checkout -f master && git clean &&
+
+	fill 1 T 3 4 5 6 S 8 >one &&
+	if git checkout renamer
+	then
+		echo Not happy
+		false
+	else
+		echo "happy - failed correctly"
+	fi &&
+
+	git checkout -m renamer &&
+
+	git diff master:one :3:uno |
+	sed -e "1,/^@@/d" -e "/^ /d" -e "s/^-/d/" -e "s/^+/a/" >current &&
+	fill d2 aT d7 aS >expect &&
+	diff current expect &&
+	git diff --cached two >current &&
+	! test -s current
 '
 
 test_done
-- 
cgit v1.2.3


From 3e0318a3613ae8e89dcb1fc39d909145e64287b9 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <junkio@cox.net>
Date: Thu, 29 Mar 2007 01:02:50 -0700
Subject: checkout: allow detaching to HEAD even when switching to the tip of a
 branch

You cannot currently checkout the tip of an existing branch
without moving to the branch.

This allows you to detach your HEAD and place it at such a
commit, with:

    $ git checkout master^0

Signed-off-by: Junio C Hamano <junkio@cox.net>
---
 t/t7201-co.sh | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 62 insertions(+), 1 deletion(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 867bbd26cb..5fa6a45577 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -3,7 +3,20 @@
 # Copyright (c) 2006 Junio C Hamano
 #
 
-test_description='git-checkout tests.'
+test_description='git-checkout tests.
+
+Creates master, forks renamer and side branches from it.
+Test switching across them.
+
+  ! [master] Initial A one, A two
+   * [renamer] Renamer R one->uno, M two
+    ! [side] Side M one, D two, A three
+  ---
+    + [side] Side M one, D two, A three
+   *  [renamer] Renamer R one->uno, M two
+  +*+ [master] Initial A one, A two
+
+'
 
 . ./test-lib.sh
 
@@ -129,4 +142,52 @@ test_expect_success 'checkout -m with merge conflict' '
 	! test -s current
 '
 
+test_expect_success 'checkout to detach HEAD' '
+
+	git checkout -f renamer && git clean &&
+	git checkout renamer^ &&
+	H=$(git rev-parse --verify HEAD) &&
+	M=$(git show-ref -s --verify refs/heads/master) &&
+	test "z$H" = "z$M" &&
+	if git symbolic-ref HEAD >/dev/null 2>&1
+	then
+		echo "OOPS, HEAD is still symbolic???"
+		false
+	else
+		: happy
+	fi
+'
+
+test_expect_success 'checkout to detach HEAD with branchname^' '
+
+	git checkout -f master && git clean &&
+	git checkout renamer^ &&
+	H=$(git rev-parse --verify HEAD) &&
+	M=$(git show-ref -s --verify refs/heads/master) &&
+	test "z$H" = "z$M" &&
+	if git symbolic-ref HEAD >/dev/null 2>&1
+	then
+		echo "OOPS, HEAD is still symbolic???"
+		false
+	else
+		: happy
+	fi
+'
+
+test_expect_success 'checkout to detach HEAD with HEAD^0' '
+
+	git checkout -f master && git clean &&
+	git checkout HEAD^0 &&
+	H=$(git rev-parse --verify HEAD) &&
+	M=$(git show-ref -s --verify refs/heads/master) &&
+	test "z$H" = "z$M" &&
+	if git symbolic-ref HEAD >/dev/null 2>&1
+	then
+		echo "OOPS, HEAD is still symbolic???"
+		false
+	else
+		: happy
+	fi
+'
+
 test_done
-- 
cgit v1.2.3


From 5035242c4785bd23c53827a1656b5f97394f724e Mon Sep 17 00:00:00 2001
From: Junio C Hamano <gitster@pobox.com>
Date: Fri, 8 Jun 2007 01:19:13 -0700
Subject: checkout: do not get confused with ambiguous tag/branch names

Although it is not advisable, we have always allowed a branch
and a tag to have the same basename (i.e. it is not illegal to
have refs/heads/frotz and refs/tags/frotz at the same time).
When talking about a specific commit, the interpretation of
'frotz' has always been "use tag and then check branch",
although we warn when ambiguities exist.

However "git checkout $name" is defined to (1) first see if it
matches the branch name, and if so switch to that branch; (2)
otherwise it is an instruction to detach HEAD to point at the
commit named by $name.  We did not follow this definition when
$name appeared under both refs/heads/ and refs/tags/ -- we
switched to the branch but read the tree from the tagged commit,
which was utterly bogus.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 5fa6a45577..ed2e9ee3c6 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -190,4 +190,44 @@ test_expect_success 'checkout to detach HEAD with HEAD^0' '
 	fi
 '
 
+test_expect_success 'checkout with ambiguous tag/branch names' '
+
+	git tag both side &&
+	git branch both master &&
+	git reset --hard &&
+	git checkout master &&
+
+	git checkout both &&
+	H=$(git rev-parse --verify HEAD) &&
+	M=$(git show-ref -s --verify refs/heads/master) &&
+	test "z$H" = "z$M" &&
+	name=$(git symbolic-ref HEAD 2>/dev/null) &&
+	test "z$name" = zrefs/heads/both
+
+'
+
+test_expect_success 'checkout with ambiguous tag/branch names' '
+
+	git reset --hard &&
+	git checkout master &&
+
+	git tag frotz side &&
+	git branch frotz master &&
+	git reset --hard &&
+	git checkout master &&
+
+	git checkout tags/frotz &&
+	H=$(git rev-parse --verify HEAD) &&
+	S=$(git show-ref -s --verify refs/heads/side) &&
+	test "z$H" = "z$S" &&
+	if name=$(git symbolic-ref HEAD 2>/dev/null)
+	then
+		echo "Bad -- should have detached"
+		false
+	else
+		: happy
+	fi
+
+'
+
 test_done
-- 
cgit v1.2.3


From 562ca192f94496611583688beb3725603ce51f89 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <gitster@pobox.com>
Date: Thu, 1 Nov 2007 17:32:04 -0700
Subject: clean: require -f to do damage by default

This makes the clean.requireForce configuration default to true.
Too many people are burned by typing "git clean" by mistake when
they meant to say "make clean".

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index ed2e9ee3c6..55558aba8b 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -77,7 +77,7 @@ test_expect_success "checkout with dirty tree without -m" '
 test_expect_success "checkout -m with dirty tree" '
 
 	git checkout -f master &&
-	git clean &&
+	git clean -f &&
 
 	fill 0 1 2 3 4 5 6 7 8 >one &&
 	git checkout -m side &&
@@ -99,7 +99,7 @@ test_expect_success "checkout -m with dirty tree" '
 
 test_expect_success "checkout -m with dirty tree, renamed" '
 
-	git checkout -f master && git clean &&
+	git checkout -f master && git clean -f &&
 
 	fill 1 2 3 4 5 7 8 >one &&
 	if git checkout renamer
@@ -121,7 +121,7 @@ test_expect_success "checkout -m with dirty tree, renamed" '
 
 test_expect_success 'checkout -m with merge conflict' '
 
-	git checkout -f master && git clean &&
+	git checkout -f master && git clean -f &&
 
 	fill 1 T 3 4 5 6 S 8 >one &&
 	if git checkout renamer
@@ -144,7 +144,7 @@ test_expect_success 'checkout -m with merge conflict' '
 
 test_expect_success 'checkout to detach HEAD' '
 
-	git checkout -f renamer && git clean &&
+	git checkout -f renamer && git clean -f &&
 	git checkout renamer^ &&
 	H=$(git rev-parse --verify HEAD) &&
 	M=$(git show-ref -s --verify refs/heads/master) &&
@@ -160,7 +160,7 @@ test_expect_success 'checkout to detach HEAD' '
 
 test_expect_success 'checkout to detach HEAD with branchname^' '
 
-	git checkout -f master && git clean &&
+	git checkout -f master && git clean -f &&
 	git checkout renamer^ &&
 	H=$(git rev-parse --verify HEAD) &&
 	M=$(git show-ref -s --verify refs/heads/master) &&
@@ -176,7 +176,7 @@ test_expect_success 'checkout to detach HEAD with branchname^' '
 
 test_expect_success 'checkout to detach HEAD with HEAD^0' '
 
-	git checkout -f master && git clean &&
+	git checkout -f master && git clean -f &&
 	git checkout HEAD^0 &&
 	H=$(git rev-parse --verify HEAD) &&
 	M=$(git show-ref -s --verify refs/heads/master) &&
-- 
cgit v1.2.3


From c07c7bf630efd8ddcd41490036c1eefb01a39f98 Mon Sep 17 00:00:00 2001
From: Daniel Barkalow <barkalow@iabervon.org>
Date: Sun, 9 Dec 2007 22:05:34 -0500
Subject: Add more checkout tests

If you have local changes that don't conflict with the
branch-switching changes, these should be kept, not cause errors even
without -m, and be reported afterwards in name-status format.

With -m, the changes carried across should be listed as well. And, for
now, include the merge-recursive output from this process.

Also test the detatched head message in at least one case.

Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 46 +++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 43 insertions(+), 3 deletions(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 55558aba8b..73d8a00e2c 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -20,6 +20,8 @@ Test switching across them.
 
 . ./test-lib.sh
 
+test_tick
+
 fill () {
 	for i
 	do
@@ -30,9 +32,10 @@ fill () {
 
 test_expect_success setup '
 
+	fill x y z > same &&
 	fill 1 2 3 4 5 6 7 8 >one &&
 	fill a b c d e >two &&
-	git add one two &&
+	git add same one two &&
 	git commit -m "Initial A one, A two" &&
 
 	git checkout -b renamer &&
@@ -74,16 +77,44 @@ test_expect_success "checkout with dirty tree without -m" '
 
 '
 
+test_expect_success "checkout with unrelated dirty tree without -m" '
+
+	git checkout -f master &&
+	fill 0 1 2 3 4 5 6 7 8 >same &&
+	cp same kept
+	git checkout side >messages &&
+	git diff same kept
+	(cat > messages.expect <<EOF
+M	same
+EOF
+) &&
+	touch messages.expect &&
+	git diff messages.expect messages
+'
+
 test_expect_success "checkout -m with dirty tree" '
 
 	git checkout -f master &&
 	git clean -f &&
 
 	fill 0 1 2 3 4 5 6 7 8 >one &&
-	git checkout -m side &&
+	git checkout -m side > messages &&
 
 	test "$(git symbolic-ref HEAD)" = "refs/heads/side" &&
 
+	(cat >expect.messages <<EOF
+Merging side with local
+Merging:
+ab76817 Side M one, D two, A three
+virtual local
+found 1 common ancestor(s):
+7329388 Initial A one, A two
+Auto-merged one
+M	one
+EOF
+) &&
+	git diff expect.messages messages &&
+
 	fill "M	one" "A	three" "D	two" >expect.master &&
 	git diff --name-status master >current.master &&
 	diff expect.master current.master &&
@@ -145,7 +176,16 @@ test_expect_success 'checkout -m with merge conflict' '
 test_expect_success 'checkout to detach HEAD' '
 
 	git checkout -f renamer && git clean -f &&
-	git checkout renamer^ &&
+	git checkout renamer^ 2>messages &&
+	(cat >messages.expect <<EOF
+Note: moving to "renamer^" which isn'"'"'t a local branch
+If you want to create a new branch from this checkout, you may do so
+(now or later) by using -b with the checkout command again. Example:
+  git checkout -b <new_branch_name>
+HEAD is now at 7329388... Initial A one, A two
+EOF
+) &&
+	git diff messages.expect messages &&
 	H=$(git rev-parse --verify HEAD) &&
 	M=$(git show-ref -s --verify refs/heads/master) &&
 	test "z$H" = "z$M" &&
-- 
cgit v1.2.3


From b1e9efa7c0153fd4e4ffc86c128262e4176e87af Mon Sep 17 00:00:00 2001
From: Daniel Barkalow <barkalow@iabervon.org>
Date: Sat, 2 Feb 2008 04:37:01 -0500
Subject: Test :/string form for checkout

Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 73d8a00e2c..dbf1ace29e 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -214,6 +214,22 @@ test_expect_success 'checkout to detach HEAD with branchname^' '
 	fi
 '
 
+test_expect_success 'checkout to detach HEAD with :/message' '
+
+	git checkout -f master && git clean -f &&
+	git checkout ":/Initial" &&
+	H=$(git rev-parse --verify HEAD) &&
+	M=$(git show-ref -s --verify refs/heads/master) &&
+	test "z$H" = "z$M" &&
+	if git symbolic-ref HEAD >/dev/null 2>&1
+	then
+		echo "OOPS, HEAD is still symbolic???"
+		false
+	else
+		: happy
+	fi
+'
+
 test_expect_success 'checkout to detach HEAD with HEAD^0' '
 
 	git checkout -f master && git clean -f &&
-- 
cgit v1.2.3


From 922d87f92f79d76ee1d9027d4a0f8a0cf36d5340 Mon Sep 17 00:00:00 2001
From: Daniel Barkalow <barkalow@iabervon.org>
Date: Thu, 7 Feb 2008 11:40:11 -0500
Subject: Use diff -u instead of diff in t7201

If the test failed, it was giving really unclear ed script
output. Instead, give a diff that sort of suggests the problem. Also
replaces the use of "git diff" for this purpose with "diff -u".

Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
---
 t/t7201-co.sh | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 73d8a00e2c..3d8e01c030 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -83,13 +83,13 @@ test_expect_success "checkout with unrelated dirty tree without -m" '
 	fill 0 1 2 3 4 5 6 7 8 >same &&
 	cp same kept
 	git checkout side >messages &&
-	git diff same kept
+	diff -u same kept
 	(cat > messages.expect <<EOF
 M	same
 EOF
 ) &&
 	touch messages.expect &&
-	git diff messages.expect messages
+	diff -u messages.expect messages
 '
 
 test_expect_success "checkout -m with dirty tree" '
@@ -113,19 +113,19 @@ Auto-merged one
 M	one
 EOF
 ) &&
-	git diff expect.messages messages &&
+	diff -u expect.messages messages &&
 
 	fill "M	one" "A	three" "D	two" >expect.master &&
 	git diff --name-status master >current.master &&
-	diff expect.master current.master &&
+	diff -u expect.master current.master &&
 
 	fill "M	one" >expect.side &&
 	git diff --name-status side >current.side &&
-	diff expect.side current.side &&
+	diff -u expect.side current.side &&
 
 	: >expect.index &&
 	git diff --cached >current.index &&
-	diff expect.index current.index
+	diff -u expect.index current.index
 '
 
 test_expect_success "checkout -m with dirty tree, renamed" '
@@ -143,7 +143,7 @@ test_expect_success "checkout -m with dirty tree, renamed" '
 
 	git checkout -m renamer &&
 	fill 1 3 4 5 7 8 >expect &&
-	diff expect uno &&
+	diff -u expect uno &&
 	! test -f one &&
 	git diff --cached >current &&
 	! test -s current
@@ -168,7 +168,7 @@ test_expect_success 'checkout -m with merge conflict' '
 	git diff master:one :3:uno |
 	sed -e "1,/^@@/d" -e "/^ /d" -e "s/^-/d/" -e "s/^+/a/" >current &&
 	fill d2 aT d7 aS >expect &&
-	diff current expect &&
+	diff -u current expect &&
 	git diff --cached two >current &&
 	! test -s current
 '
@@ -185,7 +185,7 @@ If you want to create a new branch from this checkout, you may do so
 HEAD is now at 7329388... Initial A one, A two
 EOF
 ) &&
-	git diff messages.expect messages &&
+	diff -u messages.expect messages &&
 	H=$(git rev-parse --verify HEAD) &&
 	M=$(git show-ref -s --verify refs/heads/master) &&
 	test "z$H" = "z$M" &&
-- 
cgit v1.2.3


From 782c2d65c24066a5d83453efb52763bc34c10f81 Mon Sep 17 00:00:00 2001
From: Daniel Barkalow <barkalow@iabervon.org>
Date: Thu, 7 Feb 2008 11:40:23 -0500
Subject: Build in checkout

The only differences in behavior should be:

 - git checkout -m with non-trivial merging won't print out
   merge-recursive messages (see the change in t7201-co.sh)

 - git checkout -- paths... will give a sensible error message if
   HEAD is invalid as a commit.

 - some intermediate states which were written to disk in the shell
   version (in particular, index states) are only kept in memory in
   this version, and therefore these can no longer be revealed by
   later write operations becoming impossible.

 - when we change branches, we discard MERGE_MSG, SQUASH_MSG, and
   rr-cache/MERGE_RR, like reset always has.

I'm not 100% sure I got the merge recursive setup exactly right; the
base for a non-trivial merge in the shell code doesn't seem
theoretically justified to me, but I tried to match it anyway, and the
tests all pass this way.

Other than these items, the results should be identical to the shell
version, so far as I can tell.

[jc: squashed lock-file fix from Dscho in]

Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 7 -------
 1 file changed, 7 deletions(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 3d8e01c030..5492f21c7e 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -103,13 +103,6 @@ test_expect_success "checkout -m with dirty tree" '
 	test "$(git symbolic-ref HEAD)" = "refs/heads/side" &&
 
 	(cat >expect.messages <<EOF
-Merging side with local
-Merging:
-ab76817 Side M one, D two, A three
-virtual local
-found 1 common ancestor(s):
-7329388 Initial A one, A two
-Auto-merged one
 M	one
 EOF
 ) &&
-- 
cgit v1.2.3


From 9ed36cfa35cfbd09c454f12194a91cd50ba284d1 Mon Sep 17 00:00:00 2001
From: Jay Soffian <jaysoffian@gmail.com>
Date: Tue, 19 Feb 2008 11:24:37 -0500
Subject: branch: optionally setup branch.*.merge from upstream local branches

"git branch" and "git checkout -b" now honor --track option even when
the upstream branch is local.  Previously --track was silently ignored
when forking from a local branch.  Also the command did not error out
when --track was explicitly asked for but the forked point specified
was not an existing branch (i.e. when there is no way to set up the
tracking configuration), but now it correctly does.

The configuration setting branch.autosetupmerge can now be set to
"always", which is equivalent to using --track from the command line.
Setting branch.autosetupmerge to "true" will retain the former behavior
of only setting up branch.*.merge for remote upstream branches.

Includes test cases for the new functionality.

Signed-off-by: Jay Soffian <jaysoffian@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 5492f21c7e..17cff8d515 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -263,4 +263,28 @@ test_expect_success 'checkout with ambiguous tag/branch names' '
 
 '
 
+test_expect_success \
+    'checkout w/--track sets up tracking' '
+    git config branch.autosetupmerge false &&
+    git checkout master &&
+    git checkout --track -b track1 &&
+    test "$(git config branch.track1.remote)" &&
+    test "$(git config branch.track1.merge)"'
+
+test_expect_success \
+    'checkout w/autosetupmerge=always sets up tracking' '
+    git config branch.autosetupmerge always &&
+    git checkout master &&
+    git checkout -b track2 &&
+    test "$(git config branch.track2.remote)" &&
+    test "$(git config branch.track2.merge)"
+    git config branch.autosetupmerge false'
+
+test_expect_success \
+    'checkout w/--track from non-branch HEAD fails' '
+    git checkout -b delete-me master &&
+    rm .git/refs/heads/delete-me &&
+    test refs/heads/delete-me = "$(git symbolic-ref HEAD)" &&
+    !(git checkout --track -b track)'
+
 test_done
-- 
cgit v1.2.3


From 6010d2d957fb05838cd3ab887ac261752ff8ff87 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <gitster@pobox.com>
Date: Wed, 20 Feb 2008 15:54:54 -0800
Subject: checkout: work from a subdirectory

When switching branches from a subdirectory, checkout rewritten
in C extracted the toplevel of the tree in there.

This should fix it.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 5492f21c7e..0fa94678ad 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -263,4 +263,38 @@ test_expect_success 'checkout with ambiguous tag/branch names' '
 
 '
 
+test_expect_success 'switch branches while in subdirectory' '
+
+	git reset --hard &&
+	git checkout master &&
+
+	mkdir subs &&
+	(
+		cd subs &&
+		git checkout side
+	) &&
+	! test -f subs/one &&
+	rm -fr subs
+
+'
+
+test_expect_success 'checkout specific path while in subdirectory' '
+
+	git reset --hard &&
+	git checkout side &&
+	mkdir subs &&
+	>subs/bero &&
+	git add subs/bero &&
+	git commit -m "add subs/bero" &&
+
+	git checkout master &&
+	mkdir -p subs &&
+	(
+		cd subs &&
+		git checkout side -- bero
+	) &&
+	test -f subs/bero
+
+'
+
 test_done
-- 
cgit v1.2.3


From 82ebb0b6ec7470cab96a013d3d719c109003ef83 Mon Sep 17 00:00:00 2001
From: Jeff King <peff@peff.net>
Date: Wed, 12 Mar 2008 17:36:36 -0400
Subject: add test_cmp function for test scripts

Many scripts compare actual and expected output using
"diff -u". This is nicer than "cmp" because the output shows
how the two differ. However, not all versions of diff
understand -u, leading to unnecessary test failure.

This adds a test_cmp function to the test scripts and
switches all "diff -u" invocations to use it. The function
uses the contents of "$GIT_TEST_CMP" to compare its
arguments; the default is "diff -u".

On systems with a less-capable diff, you can do:

  GIT_TEST_CMP=cmp make test

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 63915cd87b..3111baa9e3 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -83,13 +83,13 @@ test_expect_success "checkout with unrelated dirty tree without -m" '
 	fill 0 1 2 3 4 5 6 7 8 >same &&
 	cp same kept
 	git checkout side >messages &&
-	diff -u same kept
+	test_cmp same kept
 	(cat > messages.expect <<EOF
 M	same
 EOF
 ) &&
 	touch messages.expect &&
-	diff -u messages.expect messages
+	test_cmp messages.expect messages
 '
 
 test_expect_success "checkout -m with dirty tree" '
@@ -106,19 +106,19 @@ test_expect_success "checkout -m with dirty tree" '
 M	one
 EOF
 ) &&
-	diff -u expect.messages messages &&
+	test_cmp expect.messages messages &&
 
 	fill "M	one" "A	three" "D	two" >expect.master &&
 	git diff --name-status master >current.master &&
-	diff -u expect.master current.master &&
+	test_cmp expect.master current.master &&
 
 	fill "M	one" >expect.side &&
 	git diff --name-status side >current.side &&
-	diff -u expect.side current.side &&
+	test_cmp expect.side current.side &&
 
 	: >expect.index &&
 	git diff --cached >current.index &&
-	diff -u expect.index current.index
+	test_cmp expect.index current.index
 '
 
 test_expect_success "checkout -m with dirty tree, renamed" '
@@ -136,7 +136,7 @@ test_expect_success "checkout -m with dirty tree, renamed" '
 
 	git checkout -m renamer &&
 	fill 1 3 4 5 7 8 >expect &&
-	diff -u expect uno &&
+	test_cmp expect uno &&
 	! test -f one &&
 	git diff --cached >current &&
 	! test -s current
@@ -161,7 +161,7 @@ test_expect_success 'checkout -m with merge conflict' '
 	git diff master:one :3:uno |
 	sed -e "1,/^@@/d" -e "/^ /d" -e "s/^-/d/" -e "s/^+/a/" >current &&
 	fill d2 aT d7 aS >expect &&
-	diff -u current expect &&
+	test_cmp current expect &&
 	git diff --cached two >current &&
 	! test -s current
 '
@@ -178,7 +178,7 @@ If you want to create a new branch from this checkout, you may do so
 HEAD is now at 7329388... Initial A one, A two
 EOF
 ) &&
-	diff -u messages.expect messages &&
+	test_cmp messages.expect messages &&
 	H=$(git rev-parse --verify HEAD) &&
 	M=$(git show-ref -s --verify refs/heads/master) &&
 	test "z$H" = "z$M" &&
-- 
cgit v1.2.3


From 03b9dfb18ba451a2221601b740004befa7614c5b Mon Sep 17 00:00:00 2001
From: Brandon Casey <casey@nrlssc.navy.mil>
Date: Tue, 22 Jul 2008 16:16:54 -0500
Subject: t3200,t7201: replace '!' with test_must_fail

Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 3111baa9e3..9ad5d635a2 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -335,6 +335,6 @@ test_expect_success \
     git checkout -b delete-me master &&
     rm .git/refs/heads/delete-me &&
     test refs/heads/delete-me = "$(git symbolic-ref HEAD)" &&
-    !(git checkout --track -b track)'
+    test_must_fail git checkout --track -b track'
 
 test_done
-- 
cgit v1.2.3


From bb0ceb6264fa1aea6e68e07cb13cd9a88473febb Mon Sep 17 00:00:00 2001
From: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Date: Sat, 9 Aug 2008 16:00:12 +0200
Subject: checkout --track: make up a sensible branch name if '-b' was omitted

What does the user most likely want with this command?

	$ git checkout --track origin/next

Exactly.  A branch called 'next', that tracks origin's branch 'next'.
Make it so.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 9ad5d635a2..943dd57aac 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -337,4 +337,15 @@ test_expect_success \
     test refs/heads/delete-me = "$(git symbolic-ref HEAD)" &&
     test_must_fail git checkout --track -b track'
 
+test_expect_success \
+    'checkout with --track fakes a sensible -b <name>' '
+    git update-ref refs/remotes/origin/koala/bear renamer &&
+    git checkout --track origin/koala/bear &&
+    test "refs/heads/koala/bear" = "$(git symbolic-ref HEAD)" &&
+    test "$(git rev-parse HEAD)" = "$(git rev-parse renamer)"'
+
+test_expect_success \
+    'checkout with --track, but without -b, fails with too short tracked name' '
+    test_must_fail git checkout --track renamer'
+
 test_done
-- 
cgit v1.2.3


From 9188ed8962ed47c0f41c24eb1317aa07037da545 Mon Sep 17 00:00:00 2001
From: Alex Riesen <raa.lkml@gmail.com>
Date: Thu, 21 Aug 2008 19:23:20 +0200
Subject: Extend "checkout --track" DWIM to support more cases

The code handles additionally "refs/remotes/<something>/name",
"remotes/<something>/name", and "refs/<namespace>/name".

Signed-off-by: Alex Riesen <raa.lkml@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 943dd57aac..1dff84d2fd 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -340,9 +340,30 @@ test_expect_success \
 test_expect_success \
     'checkout with --track fakes a sensible -b <name>' '
     git update-ref refs/remotes/origin/koala/bear renamer &&
+    git update-ref refs/new/koala/bear renamer &&
+
     git checkout --track origin/koala/bear &&
     test "refs/heads/koala/bear" = "$(git symbolic-ref HEAD)" &&
-    test "$(git rev-parse HEAD)" = "$(git rev-parse renamer)"'
+    test "$(git rev-parse HEAD)" = "$(git rev-parse renamer)" &&
+
+    git checkout master && git branch -D koala/bear &&
+
+    git checkout --track refs/remotes/origin/koala/bear &&
+    test "refs/heads/koala/bear" = "$(git symbolic-ref HEAD)" &&
+    test "$(git rev-parse HEAD)" = "$(git rev-parse renamer)" &&
+
+    git checkout master && git branch -D koala/bear &&
+
+    git checkout --track remotes/origin/koala/bear &&
+    test "refs/heads/koala/bear" = "$(git symbolic-ref HEAD)" &&
+    test "$(git rev-parse HEAD)" = "$(git rev-parse renamer)" &&
+
+    git checkout master && git branch -D koala/bear &&
+
+    git checkout --track refs/new/koala/bear &&
+    test "refs/heads/koala/bear" = "$(git symbolic-ref HEAD)" &&
+    test "$(git rev-parse HEAD)" = "$(git rev-parse renamer)"
+'
 
 test_expect_success \
     'checkout with --track, but without -b, fails with too short tracked name' '
-- 
cgit v1.2.3


From 8fdcf3125465f70c0cad5be5ab192d46e46307c7 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <gitster@pobox.com>
Date: Fri, 29 Aug 2008 13:40:36 -0700
Subject: checkout: do not check out unmerged higher stages randomly

During a conflicted merge when you have unmerged stages for a
path F in the index, if you said:

    $ git checkout F

we rewrote F as many times as we have stages for it, and the
last one (typically "theirs") was left in the work tree, without
resolving the conflict.

This fixes it by noticing that a specified pathspec pattern
matches an unmerged path, and by erroring out.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 9ad5d635a2..83a366f1e7 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -337,4 +337,26 @@ test_expect_success \
     test refs/heads/delete-me = "$(git symbolic-ref HEAD)" &&
     test_must_fail git checkout --track -b track'
 
+test_expect_success 'checkout an unmerged path should fail' '
+	rm -f .git/index &&
+	O=$(echo original | git hash-object -w --stdin) &&
+	A=$(echo ourside | git hash-object -w --stdin) &&
+	B=$(echo theirside | git hash-object -w --stdin) &&
+	(
+		echo "100644 $A 0	fild" &&
+		echo "100644 $O 1	file" &&
+		echo "100644 $A 2	file" &&
+		echo "100644 $B 3	file" &&
+		echo "100644 $A 0	filf"
+	) | git update-index --index-info &&
+	echo "none of the above" >sample &&
+	cat sample >fild &&
+	cat sample >file &&
+	cat sample >filf &&
+	test_must_fail git checkout fild file filf &&
+	test_cmp sample fild &&
+	test_cmp sample filf &&
+	test_cmp sample file
+'
+
 test_done
-- 
cgit v1.2.3


From db9410990ee41f2b253763621c0023c782ec86e2 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <gitster@pobox.com>
Date: Sat, 30 Aug 2008 07:46:55 -0700
Subject: checkout -f: allow ignoring unmerged paths when checking out of the
 index

Earlier we made "git checkout $pathspec" to atomically refuse
the operation of $pathspec matched any path with unmerged
stages.  This patch allows:

    $ git checkout -f a b c

to ignore, instead of error out on, such unmerged paths.  The
fix to prevent checkout of an unmerged path from random stages
is still there.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 83a366f1e7..88692f9877 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -359,4 +359,27 @@ test_expect_success 'checkout an unmerged path should fail' '
 	test_cmp sample file
 '
 
+test_expect_success 'checkout with an unmerged path can be ignored' '
+	rm -f .git/index &&
+	O=$(echo original | git hash-object -w --stdin) &&
+	A=$(echo ourside | git hash-object -w --stdin) &&
+	B=$(echo theirside | git hash-object -w --stdin) &&
+	(
+		echo "100644 $A 0	fild" &&
+		echo "100644 $O 1	file" &&
+		echo "100644 $A 2	file" &&
+		echo "100644 $B 3	file" &&
+		echo "100644 $A 0	filf"
+	) | git update-index --index-info &&
+	echo "none of the above" >sample &&
+	echo ourside >expect &&
+	cat sample >fild &&
+	cat sample >file &&
+	cat sample >filf &&
+	git checkout -f fild file filf &&
+	test_cmp expect fild &&
+	test_cmp expect filf &&
+	test_cmp sample file
+'
+
 test_done
-- 
cgit v1.2.3


From 38901a48375952ab6c02f22bddfa19ac2bec2c36 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <gitster@pobox.com>
Date: Sat, 30 Aug 2008 07:48:18 -0700
Subject: checkout --ours/--theirs: allow checking out one side of a
 conflicting merge

This lets you to check out 'our' (or 'their') version of an
unmerged path out of the index while resolving conflicts.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 88692f9877..c7ae14118a 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -382,4 +382,29 @@ test_expect_success 'checkout with an unmerged path can be ignored' '
 	test_cmp sample file
 '
 
+test_expect_success 'checkout unmerged stage' '
+	rm -f .git/index &&
+	O=$(echo original | git hash-object -w --stdin) &&
+	A=$(echo ourside | git hash-object -w --stdin) &&
+	B=$(echo theirside | git hash-object -w --stdin) &&
+	(
+		echo "100644 $A 0	fild" &&
+		echo "100644 $O 1	file" &&
+		echo "100644 $A 2	file" &&
+		echo "100644 $B 3	file" &&
+		echo "100644 $A 0	filf"
+	) | git update-index --index-info &&
+	echo "none of the above" >sample &&
+	echo ourside >expect &&
+	cat sample >fild &&
+	cat sample >file &&
+	cat sample >filf &&
+	git checkout --ours . &&
+	test_cmp expect fild &&
+	test_cmp expect filf &&
+	test_cmp expect file &&
+	git checkout --theirs file &&
+	test ztheirside = "z$(cat file)"
+'
+
 test_done
-- 
cgit v1.2.3


From 0cf8581e330e7140c9f5c94a53d441187c0f8ff9 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <gitster@pobox.com>
Date: Sat, 30 Aug 2008 07:52:24 -0700
Subject: checkout -m: recreate merge when checking out of unmerged index

This teaches git-checkout to recreate a merge out of unmerged
index entries while resolving conflicts.

With this patch, checking out an unmerged path from the index
now have the following possibilities:

 * Without any option, an attempt to checkout an unmerged path
   will atomically fail (i.e. no other cleanly-merged paths are
   checked out either);

 * With "-f", other cleanly-merged paths are checked out, and
   unmerged paths are ignored;

 * With "--ours" or "--theirs, the contents from the specified
   stage is checked out;

 * With "-m" (we should add "--merge" as synonym), the 3-way merge
   is recreated from the staged object names and checked out.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index c7ae14118a..1d4ff6e8d3 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -407,4 +407,67 @@ test_expect_success 'checkout unmerged stage' '
 	test ztheirside = "z$(cat file)"
 '
 
+test_expect_success 'checkout with --merge' '
+	rm -f .git/index &&
+	O=$(echo original | git hash-object -w --stdin) &&
+	A=$(echo ourside | git hash-object -w --stdin) &&
+	B=$(echo theirside | git hash-object -w --stdin) &&
+	(
+		echo "100644 $A 0	fild" &&
+		echo "100644 $O 1	file" &&
+		echo "100644 $A 2	file" &&
+		echo "100644 $B 3	file" &&
+		echo "100644 $A 0	filf"
+	) | git update-index --index-info &&
+	echo "none of the above" >sample &&
+	echo ourside >expect &&
+	cat sample >fild &&
+	cat sample >file &&
+	cat sample >filf &&
+	git checkout -m -- fild file filf &&
+	(
+		echo "<<<<<<< ours"
+		echo ourside
+		echo "======="
+		echo theirside
+		echo ">>>>>>> theirs"
+	) >merged &&
+	test_cmp expect fild &&
+	test_cmp expect filf &&
+	test_cmp merged file
+'
+
+test_expect_success 'checkout with --merge, in diff3 -m style' '
+	git config merge.conflictstyle diff3 &&
+	rm -f .git/index &&
+	O=$(echo original | git hash-object -w --stdin) &&
+	A=$(echo ourside | git hash-object -w --stdin) &&
+	B=$(echo theirside | git hash-object -w --stdin) &&
+	(
+		echo "100644 $A 0	fild" &&
+		echo "100644 $O 1	file" &&
+		echo "100644 $A 2	file" &&
+		echo "100644 $B 3	file" &&
+		echo "100644 $A 0	filf"
+	) | git update-index --index-info &&
+	echo "none of the above" >sample &&
+	echo ourside >expect &&
+	cat sample >fild &&
+	cat sample >file &&
+	cat sample >filf &&
+	git checkout -m -- fild file filf &&
+	(
+		echo "<<<<<<< ours"
+		echo ourside
+		echo "|||||||"
+		echo original
+		echo "======="
+		echo theirside
+		echo ">>>>>>> theirs"
+	) >merged &&
+	test_cmp expect fild &&
+	test_cmp expect filf &&
+	test_cmp merged file
+'
+
 test_done
-- 
cgit v1.2.3


From eac5a401512181cd315a1031af2b8a25430e335a Mon Sep 17 00:00:00 2001
From: Junio C Hamano <gitster@pobox.com>
Date: Sun, 31 Aug 2008 19:32:40 -0700
Subject: checkout --conflict=<style>: recreate merge in a non-default style

This new option does essentially the same thing as -m option when checking
unmerged paths out of the index, but it uses the specified style instead
of configured merge.conflictstyle.

Setting "merge.conflictstyle" to "diff3" is usually less useful than using
the default "merge" style, because the latter allows a conflict that
results by both sides changing the same region in a very similar way to
get simplified substancially by reducing the common lines.  However, when
one side removed a group of lines (perhaps a function was moved to some
other file) while the other side modified it, the default "merge" style
does not give any clue as to why the hunk is left conflicting.  You would
need the original to understand what is going on.

The recommended use would be not to set merge.conflictstyle variable so
that you would usually use the default "merge" style conflict, and when
the result in a path in a particular merge is too hard to understand, use
"git checkout --conflict=diff3 $path" to check it out with the original to
review what is going on.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 100 +++++++++++++++++++++++++++++++---------------------------
 1 file changed, 54 insertions(+), 46 deletions(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 1d4ff6e8d3..ac49311cf2 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -337,7 +337,7 @@ test_expect_success \
     test refs/heads/delete-me = "$(git symbolic-ref HEAD)" &&
     test_must_fail git checkout --track -b track'
 
-test_expect_success 'checkout an unmerged path should fail' '
+setup_conflicting_index () {
 	rm -f .git/index &&
 	O=$(echo original | git hash-object -w --stdin) &&
 	A=$(echo ourside | git hash-object -w --stdin) &&
@@ -348,7 +348,11 @@ test_expect_success 'checkout an unmerged path should fail' '
 		echo "100644 $A 2	file" &&
 		echo "100644 $B 3	file" &&
 		echo "100644 $A 0	filf"
-	) | git update-index --index-info &&
+	) | git update-index --index-info
+}
+
+test_expect_success 'checkout an unmerged path should fail' '
+	setup_conflicting_index &&
 	echo "none of the above" >sample &&
 	cat sample >fild &&
 	cat sample >file &&
@@ -360,17 +364,7 @@ test_expect_success 'checkout an unmerged path should fail' '
 '
 
 test_expect_success 'checkout with an unmerged path can be ignored' '
-	rm -f .git/index &&
-	O=$(echo original | git hash-object -w --stdin) &&
-	A=$(echo ourside | git hash-object -w --stdin) &&
-	B=$(echo theirside | git hash-object -w --stdin) &&
-	(
-		echo "100644 $A 0	fild" &&
-		echo "100644 $O 1	file" &&
-		echo "100644 $A 2	file" &&
-		echo "100644 $B 3	file" &&
-		echo "100644 $A 0	filf"
-	) | git update-index --index-info &&
+	setup_conflicting_index &&
 	echo "none of the above" >sample &&
 	echo ourside >expect &&
 	cat sample >fild &&
@@ -383,17 +377,7 @@ test_expect_success 'checkout with an unmerged path can be ignored' '
 '
 
 test_expect_success 'checkout unmerged stage' '
-	rm -f .git/index &&
-	O=$(echo original | git hash-object -w --stdin) &&
-	A=$(echo ourside | git hash-object -w --stdin) &&
-	B=$(echo theirside | git hash-object -w --stdin) &&
-	(
-		echo "100644 $A 0	fild" &&
-		echo "100644 $O 1	file" &&
-		echo "100644 $A 2	file" &&
-		echo "100644 $B 3	file" &&
-		echo "100644 $A 0	filf"
-	) | git update-index --index-info &&
+	setup_conflicting_index &&
 	echo "none of the above" >sample &&
 	echo ourside >expect &&
 	cat sample >fild &&
@@ -408,17 +392,7 @@ test_expect_success 'checkout unmerged stage' '
 '
 
 test_expect_success 'checkout with --merge' '
-	rm -f .git/index &&
-	O=$(echo original | git hash-object -w --stdin) &&
-	A=$(echo ourside | git hash-object -w --stdin) &&
-	B=$(echo theirside | git hash-object -w --stdin) &&
-	(
-		echo "100644 $A 0	fild" &&
-		echo "100644 $O 1	file" &&
-		echo "100644 $A 2	file" &&
-		echo "100644 $B 3	file" &&
-		echo "100644 $A 0	filf"
-	) | git update-index --index-info &&
+	setup_conflicting_index &&
 	echo "none of the above" >sample &&
 	echo ourside >expect &&
 	cat sample >fild &&
@@ -439,17 +413,7 @@ test_expect_success 'checkout with --merge' '
 
 test_expect_success 'checkout with --merge, in diff3 -m style' '
 	git config merge.conflictstyle diff3 &&
-	rm -f .git/index &&
-	O=$(echo original | git hash-object -w --stdin) &&
-	A=$(echo ourside | git hash-object -w --stdin) &&
-	B=$(echo theirside | git hash-object -w --stdin) &&
-	(
-		echo "100644 $A 0	fild" &&
-		echo "100644 $O 1	file" &&
-		echo "100644 $A 2	file" &&
-		echo "100644 $B 3	file" &&
-		echo "100644 $A 0	filf"
-	) | git update-index --index-info &&
+	setup_conflicting_index &&
 	echo "none of the above" >sample &&
 	echo ourside >expect &&
 	cat sample >fild &&
@@ -470,4 +434,48 @@ test_expect_success 'checkout with --merge, in diff3 -m style' '
 	test_cmp merged file
 '
 
+test_expect_success 'checkout --conflict=merge, overriding config' '
+	git config merge.conflictstyle diff3 &&
+	setup_conflicting_index &&
+	echo "none of the above" >sample &&
+	echo ourside >expect &&
+	cat sample >fild &&
+	cat sample >file &&
+	cat sample >filf &&
+	git checkout --conflict=merge -- fild file filf &&
+	(
+		echo "<<<<<<< ours"
+		echo ourside
+		echo "======="
+		echo theirside
+		echo ">>>>>>> theirs"
+	) >merged &&
+	test_cmp expect fild &&
+	test_cmp expect filf &&
+	test_cmp merged file
+'
+
+test_expect_success 'checkout --conflict=diff3' '
+	git config --unset merge.conflictstyle
+	setup_conflicting_index &&
+	echo "none of the above" >sample &&
+	echo ourside >expect &&
+	cat sample >fild &&
+	cat sample >file &&
+	cat sample >filf &&
+	git checkout --conflict=diff3 -- fild file filf &&
+	(
+		echo "<<<<<<< ours"
+		echo ourside
+		echo "|||||||"
+		echo original
+		echo "======="
+		echo theirside
+		echo ">>>>>>> theirs"
+	) >merged &&
+	test_cmp expect fild &&
+	test_cmp expect filf &&
+	test_cmp merged file
+'
+
 test_done
-- 
cgit v1.2.3


From 47a528ad24185133867ebb5bb7692db2cb8bef39 Mon Sep 17 00:00:00 2001
From: Nanako Shiraishi <nanako3@lavabit.com>
Date: Wed, 3 Sep 2008 17:59:33 +0900
Subject: tests: use "git xyzzy" form (t7200 - t9001)

Converts tests between t7201-t9001.

Signed-off-by: Nanako Shiraishi <nanako3@lavabit.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 9ad5d635a2..2e2b3bf53d 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -3,7 +3,7 @@
 # Copyright (c) 2006 Junio C Hamano
 #
 
-test_description='git-checkout tests.
+test_description='git checkout tests.
 
 Creates master, forks renamer and side branches from it.
 Test switching across them.
-- 
cgit v1.2.3


From 352eadc40024b141e1295693654ec20cc123844f Mon Sep 17 00:00:00 2001
From: Daniel Barkalow <barkalow@iabervon.org>
Date: Sun, 21 Sep 2008 14:36:06 -0400
Subject: Check early that a new branch is new and valid

If you fail to update refs to change branches in checkout, your index
and working tree are left already updated. We don't have an easy way
to undo this, but at least we can check things that would make the
creation of a new branch fail. These checks were in the shell version,
and were lost in the C conversion.

The messages are from the shell version, and should probably be made nicer.

[jc: added test to t7201]

Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index fbec70d3c6..0679abd29d 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -359,4 +359,14 @@ test_expect_success 'checkout an unmerged path should fail' '
 	test_cmp sample file
 '
 
+test_expect_success 'failing checkout -b should not break working tree' '
+	git reset --hard master &&
+	git symbolic-ref HEAD refs/heads/master &&
+	test_must_fail git checkout -b renamer side^ &&
+	test $(git symbolic-ref HEAD) = refs/heads/master &&
+	git diff --exit-code &&
+	git diff --cached --exit-code
+
+'
+
 test_done
-- 
cgit v1.2.3


From 51a94af845cb3f797abd638478834721d7295af7 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <gitster@pobox.com>
Date: Thu, 16 Oct 2008 23:37:44 -0700
Subject: Fix "checkout --track -b newbranch" on detached HEAD

The test to make sure that checkout fails when --track was asked for and
we cannot set up tracking information in t7201 was wrong, and it turns out
that the implementation for that feature itself was buggy.  This fixes it.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index fbec70d3c6..ee2cab6bb2 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -330,12 +330,14 @@ test_expect_success \
     test "$(git config branch.track2.merge)"
     git config branch.autosetupmerge false'
 
-test_expect_success \
-    'checkout w/--track from non-branch HEAD fails' '
-    git checkout -b delete-me master &&
-    rm .git/refs/heads/delete-me &&
-    test refs/heads/delete-me = "$(git symbolic-ref HEAD)" &&
-    test_must_fail git checkout --track -b track'
+test_expect_success 'checkout w/--track from non-branch HEAD fails' '
+    git checkout master^0 &&
+    test_must_fail git symbolic-ref HEAD &&
+    test_must_fail git checkout --track -b track &&
+    test_must_fail git rev-parse --verify track &&
+    test_must_fail git symbolic-ref HEAD &&
+    test "z$(git rev-parse master^0)" = "z$(git rev-parse HEAD)"
+'
 
 test_expect_success 'checkout an unmerged path should fail' '
 	rm -f .git/index &&
-- 
cgit v1.2.3


From f5637549a7eb93883839de01399418e10bf81768 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <gitster@pobox.com>
Date: Fri, 17 Oct 2008 15:56:11 -0700
Subject: demonstrate breakage of detached checkout with symbolic link HEAD

When core.prefersymlinkrefs is in use, detaching the HEAD by
checkout incorrectly clobbers the tip of the current branch.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index ee2cab6bb2..3f70adaf5a 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -339,6 +339,18 @@ test_expect_success 'checkout w/--track from non-branch HEAD fails' '
     test "z$(git rev-parse master^0)" = "z$(git rev-parse HEAD)"
 '
 
+test_expect_failure 'detach a symbolic link HEAD' '
+    git checkout master &&
+    git config --bool core.prefersymlinkrefs yes &&
+    git checkout side &&
+    git checkout master &&
+    it=$(git symbolic-ref HEAD) &&
+    test "z$it" = zrefs/heads/master &&
+    here=$(git rev-parse --verify refs/heads/master) &&
+    git checkout side^ &&
+    test "z$(git rev-parse --verify refs/heads/master)" = "z$here"
+'
+
 test_expect_success 'checkout an unmerged path should fail' '
 	rm -f .git/index &&
 	O=$(echo original | git hash-object -w --stdin) &&
-- 
cgit v1.2.3


From acd3b9eca82e38950f94e4708b528b7dae09a7c8 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <gitster@pobox.com>
Date: Fri, 17 Oct 2008 15:44:39 -0700
Subject: Enhance hold_lock_file_for_{update,append}() API

This changes the "die_on_error" boolean parameter to a mere "flags", and
changes the existing callers of hold_lock_file_for_update/append()
functions to pass LOCK_DIE_ON_ERROR.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 3f70adaf5a..f93478f97f 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -339,7 +339,7 @@ test_expect_success 'checkout w/--track from non-branch HEAD fails' '
     test "z$(git rev-parse master^0)" = "z$(git rev-parse HEAD)"
 '
 
-test_expect_failure 'detach a symbolic link HEAD' '
+test_expect_success 'detach a symbolic link HEAD' '
     git checkout master &&
     git config --bool core.prefersymlinkrefs yes &&
     git checkout side &&
-- 
cgit v1.2.3


From 714fddf2fc50cd5abb11d75837e6340edb9601f6 Mon Sep 17 00:00:00 2001
From: Jari Aalto <jari.aalto@cante.net>
Date: Sat, 21 Mar 2009 11:00:54 +0200
Subject: Change double quotes to single quotes in message

Most of the time when we give branch name in the message, we quote it
inside a pair of single-quotes.  git-checkout uses double-quotes; this
patch corrects the inconsistency.

Signed-off-by: Jari Aalto <jari.aalto@cante.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 0e21632f19..bdb808af1a 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -171,7 +171,7 @@ test_expect_success 'checkout to detach HEAD' '
 	git checkout -f renamer && git clean -f &&
 	git checkout renamer^ 2>messages &&
 	(cat >messages.expect <<EOF
-Note: moving to "renamer^" which isn'"'"'t a local branch
+Note: moving to '\''renamer^'\'' which isn'\''t a local branch
 If you want to create a new branch from this checkout, you may do so
 (now or later) by using -b with the checkout command again. Example:
   git checkout -b <new_branch_name>
-- 
cgit v1.2.3


From e4b09dad9f65395fd4bb8ab165012a3a6698a75b Mon Sep 17 00:00:00 2001
From: Nanako Shiraishi <nanako3@lavabit.com>
Date: Sun, 17 May 2009 11:43:08 +0900
Subject: test: checkout shouldn't say that HEAD has moved if it didn't
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: しらいしななこ <nanako3@lavabit.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index bdb808af1a..ebfd34df36 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -534,4 +534,12 @@ test_expect_success 'failing checkout -b should not break working tree' '
 
 '
 
+test_expect_success 'switch out of non-branch' '
+	git reset --hard master &&
+	git checkout master^0 &&
+	echo modified >one &&
+	test_must_fail git checkout renamer 2>error.log &&
+	! grep "^Previous HEAD" error.log
+'
+
 test_done
-- 
cgit v1.2.3


From 6d6f9acc5db0dfae94ef22c9ecbcf7df00f84399 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <gitster@pobox.com>
Date: Wed, 6 Jan 2010 12:32:02 -0800
Subject: checkout -m path: fix recreating conflicts

We should tell ll_merge() that the 3-way merge between stages #2 and #3 is
an outermost merge, not a virtual-ancestor creation.

Back when this code was originally written, users couldn't write custom
merge drivers easily, so the bug didn't matter, but these days it does.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 0e21632f19..3214ad29e1 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -534,4 +534,61 @@ test_expect_success 'failing checkout -b should not break working tree' '
 
 '
 
+(
+ echo "#!$SHELL_PATH"
+ cat <<\EOF
+O=$1 A=$2 B=$3
+cat "$A" >.tmp
+exec >"$A"
+echo '<<<<<<< filfre-theirs'
+cat "$B"
+echo '||||||| filfre-common'
+cat "$O"
+echo '======='
+cat ".tmp"
+echo '>>>>>>> filfre-ours'
+rm -f .tmp
+exit 1
+EOF
+) >filfre.sh
+chmod +x filfre.sh
+
+test_expect_success 'custom merge driver with checkout -m' '
+	git reset --hard &&
+
+	git config merge.filfre.driver "./filfre.sh %O %A %B" &&
+	git config merge.filfre.name "Feel-free merge driver" &&
+	git config merge.filfre.recursive binary &&
+	echo "arm merge=filfre" >.gitattributes &&
+
+	git checkout -b left &&
+	echo neutral >arm &&
+	git add arm .gitattributes &&
+	test_tick &&
+	git commit -m neutral &&
+	git branch right &&
+
+	echo left >arm &&
+	test_tick &&
+	git commit -a -m left &&
+	git checkout right &&
+
+	echo right >arm &&
+	test_tick &&
+	git commit -a -m right &&
+
+	test_must_fail git merge left &&
+	(
+		for t in filfre-common left right
+		do
+			grep $t arm || exit 1
+		done
+		exit 0
+	) &&
+
+	mv arm expect &&
+	git checkout -m arm &&
+	test_cmp expect arm
+'
+
 test_done
-- 
cgit v1.2.3


From 13be3e31f1775bd496fc5bc1ab5b745052f4d07d Mon Sep 17 00:00:00 2001
From: Junio C Hamano <gitster@pobox.com>
Date: Fri, 29 Jan 2010 22:03:24 -0800
Subject: Reword "detached HEAD" notification

The old "advice" message explained how to create a branch after going into
a detached HEAD state but didn't make it clear why the user may want to do
so.  Also "moving to ... which isn't a local branch" was unclear if it is
complaining, if it is describing the new state, or if it is explaining why
the HEAD is detached (the true reason is the last one).

Give the established phrase 'detached HEAD' first to make it easy for
users to look up the concept in documentation, and briefly describe what
can be done in the state (i.e. play around without having to clean up)
before telling the user how to keep what was done during the temporary
state.

Allow the long description to be hidden by setting advice.detachedHead
configuration to false.

We might want to customize the advice depending on how the commit to check
out was spelled (e.g. instead of "new-branch-name", we way want to say
"topic" when "git checkout origin/topic" triggered this message) in later
updates, but this encapsulates that into a separate function and it should
be a good first step.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 32 ++++++++++++++++++++++----------
 1 file changed, 22 insertions(+), 10 deletions(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 6442f710be..d20ed61b48 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -166,19 +166,31 @@ test_expect_success 'checkout -m with merge conflict' '
 	! test -s current
 '
 
-test_expect_success 'checkout to detach HEAD' '
+test_expect_success 'checkout to detach HEAD (with advice declined)' '
 
+	git config advice.detachedHead false &&
 	git checkout -f renamer && git clean -f &&
 	git checkout renamer^ 2>messages &&
-	(cat >messages.expect <<EOF
-Note: moving to '\''renamer^'\'' which isn'\''t a local branch
-If you want to create a new branch from this checkout, you may do so
-(now or later) by using -b with the checkout command again. Example:
-  git checkout -b <new_branch_name>
-HEAD is now at 7329388... Initial A one, A two
-EOF
-) &&
-	test_cmp messages.expect messages &&
+	grep "HEAD is now at 7329388" messages &&
+	test 1 -eq $(wc -l <messages) &&
+	H=$(git rev-parse --verify HEAD) &&
+	M=$(git show-ref -s --verify refs/heads/master) &&
+	test "z$H" = "z$M" &&
+	if git symbolic-ref HEAD >/dev/null 2>&1
+	then
+		echo "OOPS, HEAD is still symbolic???"
+		false
+	else
+		: happy
+	fi
+'
+
+test_expect_success 'checkout to detach HEAD' '
+	git config advice.detachedHead true &&
+	git checkout -f renamer && git clean -f &&
+	git checkout renamer^ 2>messages &&
+	grep "HEAD is now at 7329388" messages &&
+	test 1 -lt $(wc -l <messages) &&
 	H=$(git rev-parse --verify HEAD) &&
 	M=$(git show-ref -s --verify refs/heads/master) &&
 	test "z$H" = "z$M" &&
-- 
cgit v1.2.3


From 47349a8cc02b3cb39bfc69cb7abec88ad3e34ebf Mon Sep 17 00:00:00 2001
From: Jonathan Nieder <jrnieder@gmail.com>
Date: Sat, 20 Mar 2010 19:27:17 -0500
Subject: tests: document format of conflicts from checkout -m
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

We are about to change the format of the conflict hunks that ‘checkout
--merge’ writes.  Add tests checking the current behavior first.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 61 insertions(+), 4 deletions(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index d20ed61b48..01175f74d2 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -11,10 +11,12 @@ Test switching across them.
   ! [master] Initial A one, A two
    * [renamer] Renamer R one->uno, M two
     ! [side] Side M one, D two, A three
-  ---
-    + [side] Side M one, D two, A three
-   *  [renamer] Renamer R one->uno, M two
-  +*+ [master] Initial A one, A two
+     ! [simple] Simple D one, M two
+  ----
+     + [simple] Simple D one, M two
+    +  [side] Side M one, D two, A three
+   *   [renamer] Renamer R one->uno, M two
+  +*++ [master] Initial A one, A two
 
 '
 
@@ -52,6 +54,11 @@ test_expect_success setup '
 	git update-index --add --remove one two three &&
 	git commit -m "Side M one, D two, A three" &&
 
+	git checkout -b simple master &&
+	rm -f one &&
+	fill a c e > two &&
+	git commit -a -m "Simple D one, M two" &&
+
 	git checkout master
 '
 
@@ -166,6 +173,56 @@ test_expect_success 'checkout -m with merge conflict' '
 	! test -s current
 '
 
+test_expect_success 'format of merge conflict from checkout -m' '
+
+	git checkout -f master && git clean -f &&
+
+	fill b d > two &&
+	git checkout -m simple &&
+
+	git ls-files >current &&
+	fill same two two two >expect &&
+	test_cmp current expect &&
+
+	cat <<-EOF >expect &&
+	<<<<<<< simple
+	a
+	c
+	e
+	=======
+	b
+	d
+	>>>>>>> local
+	EOF
+	test_cmp two expect
+'
+
+test_expect_success 'checkout --merge --conflict=diff3 <branch>' '
+
+	git checkout -f master && git reset --hard && git clean -f &&
+
+	fill b d > two &&
+	git checkout --merge --conflict=diff3 simple &&
+
+	cat <<-EOF >expect &&
+	<<<<<<< simple
+	a
+	c
+	e
+	|||||||
+	a
+	b
+	c
+	d
+	e
+	=======
+	b
+	d
+	>>>>>>> local
+	EOF
+	test_cmp two expect
+'
+
 test_expect_success 'checkout to detach HEAD (with advice declined)' '
 
 	git config advice.detachedHead false &&
-- 
cgit v1.2.3


From f0531a2937e919e763ab05e9800aef51658104fc Mon Sep 17 00:00:00 2001
From: Jonathan Nieder <jrnieder@gmail.com>
Date: Sat, 20 Mar 2010 19:40:19 -0500
Subject: checkout --conflict=diff3: add a label for ancestor
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

git checkout --conflict=diff3 can be used to present conflicts hunks
including text from the common ancestor:

	<<<<<<< ours
	ourside
	|||||||
	original
	=======
	theirside
	>>>>>>> theirs

The added information is helpful for resolving a merge by hand, and
merge tools can usually understand it without trouble because it looks
like output from ‘diff3 -m’.

diff3 includes a label for the merge base on the ||||||| line, and it
seems some tools (for example, Emacs 22’s smerge-mode) cannot parse
conflict hunks without such a label.  Humans could use help in
interpreting the output, too.  So change the marker for the start of the
text from the common ancestor to include the label “base”.

git rerere’s conflict identifiers are not affected: to parse conflict
hunks, rerere looks for whitespace after the ||||||| marker rather
than a newline, and to compute preimage ids, rerere has its own code
for creating conflict hunks.  No other code in git tries to parse
conflict hunks.

Requested-by: Stefan Monnier <monnier@iro.umontreal.ca>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 01175f74d2..f3f0c4cfdc 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -538,7 +538,7 @@ test_expect_success 'checkout with --merge, in diff3 -m style' '
 	(
 		echo "<<<<<<< ours"
 		echo ourside
-		echo "|||||||"
+		echo "||||||| base"
 		echo original
 		echo "======="
 		echo theirside
@@ -582,7 +582,7 @@ test_expect_success 'checkout --conflict=diff3' '
 	(
 		echo "<<<<<<< ours"
 		echo ourside
-		echo "|||||||"
+		echo "||||||| base"
 		echo original
 		echo "======="
 		echo theirside
-- 
cgit v1.2.3


From c4151629e7019d072cefdac992e164820ce9ed1c Mon Sep 17 00:00:00 2001
From: Jonathan Nieder <jrnieder@gmail.com>
Date: Sat, 20 Mar 2010 19:42:51 -0500
Subject: checkout -m --conflict=diff3: add a label for ancestor
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

git checkout --merge --conflict=diff3 can be used to present conflict
hunks including text from the common ancestor.  The added information
is helpful for resolving a merge by hand, and merge tools tend to
understand it because it is very similar to what ‘diff3 -m’ produces.

Unlike current git, diff3 -m includes a label for the merge base on
the ||||||| line, and unfortunately, some tools cannot parse the
conflict hunks without it.  Humans can benefit from a cue when
learning to interpreting the format, too.  Mark the start of the text
from the old branch with a label based on the branch’s name.

git rerere does not have trouble parsing this output and its preimage
ids are unchanged since it includes its own code for recreating
conflict hunks.  No other code in git tries to parse conflict hunks.

Requested-by: Stefan Monnier <monnier@iro.umontreal.ca>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index f3f0c4cfdc..1337fa5a22 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -209,7 +209,7 @@ test_expect_success 'checkout --merge --conflict=diff3 <branch>' '
 	a
 	c
 	e
-	|||||||
+	||||||| master
 	a
 	b
 	c
-- 
cgit v1.2.3


From 21b5b1e8dc9bed2b518defe29d69ebc27da4b68f Mon Sep 17 00:00:00 2001
From: Johan Herland <johan@herland.net>
Date: Thu, 17 Feb 2011 00:12:20 +0100
Subject: branch/checkout --track: Ensure that upstream branch is indeed a
 branch

When creating a new branch using the --track option, we must make sure that
we don't try to set an upstream that does not make sense to follow (using
'git pull') or update (using 'git push'). The current code checks against
using HEAD as upstream (since tracking a symref doesn't make sense). However,
tracking a tag doesn't make sense either. Indeed, tracking _any_ ref that is
not a (local or remote) branch doesn't make sense, and should be disallowed.

This patch achieves this by checking that the ref we're trying to --track
resides within refs/heads/* or refs/remotes/*. This new check replaces the
previous check against HEAD.

A couple of testcases are also added, verifying that we cannot create
branches with tags as upstreams.

Finally, some selftests relying on using a non-branch as an upstream have
been reworked or removed:

- t6040: Reverse the meaning of two tests that depend on the ability to
use (lightweight and annotated) tags as upstreams. These two tests were
originally added in commits 1be570f and 57ffc5f, and this patch reverts the
intention of those two commits.

- t7201: Remove part of a test (introduced in 9188ed8) relying on a
non-branch as upstream.

Signed-off-by: Johan Herland <johan@herland.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 1337fa5a22..0c002ab695 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -408,6 +408,15 @@ test_expect_success 'checkout w/--track from non-branch HEAD fails' '
     test "z$(git rev-parse master^0)" = "z$(git rev-parse HEAD)"
 '
 
+test_expect_success 'checkout w/--track from tag fails' '
+    git checkout master^0 &&
+    test_must_fail git symbolic-ref HEAD &&
+    test_must_fail git checkout --track -b track frotz &&
+    test_must_fail git rev-parse --verify track &&
+    test_must_fail git symbolic-ref HEAD &&
+    test "z$(git rev-parse master^0)" = "z$(git rev-parse HEAD)"
+'
+
 test_expect_success 'detach a symbolic link HEAD' '
     git checkout master &&
     git config --bool core.prefersymlinkrefs yes &&
@@ -423,7 +432,6 @@ test_expect_success 'detach a symbolic link HEAD' '
 test_expect_success \
     'checkout with --track fakes a sensible -b <name>' '
     git update-ref refs/remotes/origin/koala/bear renamer &&
-    git update-ref refs/new/koala/bear renamer &&
 
     git checkout --track origin/koala/bear &&
     test "refs/heads/koala/bear" = "$(git symbolic-ref HEAD)" &&
@@ -439,12 +447,6 @@ test_expect_success \
 
     git checkout --track remotes/origin/koala/bear &&
     test "refs/heads/koala/bear" = "$(git symbolic-ref HEAD)" &&
-    test "$(git rev-parse HEAD)" = "$(git rev-parse renamer)" &&
-
-    git checkout master && git branch -D koala/bear &&
-
-    git checkout --track refs/new/koala/bear &&
-    test "refs/heads/koala/bear" = "$(git symbolic-ref HEAD)" &&
     test "$(git rev-parse HEAD)" = "$(git rev-parse renamer)"
 '
 
-- 
cgit v1.2.3


From 9398cc4bd44a08a0f6a69b01b2051b94bd2f994d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=86var=20Arnfj=C3=B6r=C3=B0=20Bjarmason?=
 <avarab@gmail.com>
Date: Tue, 22 Feb 2011 23:41:42 +0000
Subject: i18n: git-checkout "HEAD is now at" message
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Gettextize the "HEAD is now at" messages. Several tests in t7201-co.sh
explicitly checked for this message. Change them to skip under
GETTEXT_POISON=YesPlease.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 1337fa5a22..fb1fe6886c 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -223,7 +223,7 @@ test_expect_success 'checkout --merge --conflict=diff3 <branch>' '
 	test_cmp two expect
 '
 
-test_expect_success 'checkout to detach HEAD (with advice declined)' '
+test_expect_success C_LOCALE_OUTPUT 'checkout to detach HEAD (with advice declined)' '
 
 	git config advice.detachedHead false &&
 	git checkout -f renamer && git clean -f &&
@@ -242,7 +242,7 @@ test_expect_success 'checkout to detach HEAD (with advice declined)' '
 	fi
 '
 
-test_expect_success 'checkout to detach HEAD' '
+test_expect_success C_LOCALE_OUTPUT 'checkout to detach HEAD' '
 	git config advice.detachedHead true &&
 	git checkout -f renamer && git clean -f &&
 	git checkout renamer^ 2>messages &&
@@ -260,7 +260,7 @@ test_expect_success 'checkout to detach HEAD' '
 	fi
 '
 
-test_expect_success 'checkout to detach HEAD with branchname^' '
+test_expect_success C_LOCALE_OUTPUT 'checkout to detach HEAD with branchname^' '
 
 	git checkout -f master && git clean -f &&
 	git checkout renamer^ &&
@@ -276,7 +276,7 @@ test_expect_success 'checkout to detach HEAD with branchname^' '
 	fi
 '
 
-test_expect_success 'checkout to detach HEAD with :/message' '
+test_expect_success C_LOCALE_OUTPUT 'checkout to detach HEAD with :/message' '
 
 	git checkout -f master && git clean -f &&
 	git checkout ":/Initial" &&
@@ -292,7 +292,7 @@ test_expect_success 'checkout to detach HEAD with :/message' '
 	fi
 '
 
-test_expect_success 'checkout to detach HEAD with HEAD^0' '
+test_expect_success C_LOCALE_OUTPUT 'checkout to detach HEAD with HEAD^0' '
 
 	git checkout -f master && git clean -f &&
 	git checkout HEAD^0 &&
-- 
cgit v1.2.3


From 69382976aafae713c72d40b80f8900699c35bc76 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <gitster@pobox.com>
Date: Tue, 12 Apr 2011 16:39:14 -0700
Subject: i18n: use test_i18ngrep in t7201

Some test were mistakenly disabled under GETTEXT_POISON as well,
and they have been resurrected.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/t7201-co.sh | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

(limited to 't/t7201-co.sh')

diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index 37ed0931d9..07fb53adcb 100755
--- a/t/t7201-co.sh
+++ b/t/t7201-co.sh
@@ -223,12 +223,12 @@ test_expect_success 'checkout --merge --conflict=diff3 <branch>' '
 	test_cmp two expect
 '
 
-test_expect_success C_LOCALE_OUTPUT 'checkout to detach HEAD (with advice declined)' '
+test_expect_success 'checkout to detach HEAD (with advice declined)' '
 
 	git config advice.detachedHead false &&
 	git checkout -f renamer && git clean -f &&
 	git checkout renamer^ 2>messages &&
-	grep "HEAD is now at 7329388" messages &&
+	test_i18ngrep "HEAD is now at 7329388" messages &&
 	test 1 -eq $(wc -l <messages) &&
 	H=$(git rev-parse --verify HEAD) &&
 	M=$(git show-ref -s --verify refs/heads/master) &&
@@ -242,11 +242,11 @@ test_expect_success C_LOCALE_OUTPUT 'checkout to detach HEAD (with advice declin
 	fi
 '
 
-test_expect_success C_LOCALE_OUTPUT 'checkout to detach HEAD' '
+test_expect_success 'checkout to detach HEAD' '
 	git config advice.detachedHead true &&
 	git checkout -f renamer && git clean -f &&
 	git checkout renamer^ 2>messages &&
-	grep "HEAD is now at 7329388" messages &&
+	test_i18ngrep "HEAD is now at 7329388" messages &&
 	test 1 -lt $(wc -l <messages) &&
 	H=$(git rev-parse --verify HEAD) &&
 	M=$(git show-ref -s --verify refs/heads/master) &&
@@ -260,7 +260,7 @@ test_expect_success C_LOCALE_OUTPUT 'checkout to detach HEAD' '
 	fi
 '
 
-test_expect_success C_LOCALE_OUTPUT 'checkout to detach HEAD with branchname^' '
+test_expect_success 'checkout to detach HEAD with branchname^' '
 
 	git checkout -f master && git clean -f &&
 	git checkout renamer^ &&
@@ -276,7 +276,7 @@ test_expect_success C_LOCALE_OUTPUT 'checkout to detach HEAD with branchname^' '
 	fi
 '
 
-test_expect_success C_LOCALE_OUTPUT 'checkout to detach HEAD with :/message' '
+test_expect_success 'checkout to detach HEAD with :/message' '
 
 	git checkout -f master && git clean -f &&
 	git checkout ":/Initial" &&
@@ -292,7 +292,7 @@ test_expect_success C_LOCALE_OUTPUT 'checkout to detach HEAD with :/message' '
 	fi
 '
 
-test_expect_success C_LOCALE_OUTPUT 'checkout to detach HEAD with HEAD^0' '
+test_expect_success 'checkout to detach HEAD with HEAD^0' '
 
 	git checkout -f master && git clean -f &&
 	git checkout HEAD^0 &&
-- 
cgit v1.2.3