Merge branch 'db/checkout'

* db/checkout: (21 commits)
  checkout: error out when index is unmerged even with -m
  checkout: show progress when checkout takes long time while switching branches
  Add merge-subtree back
  checkout: updates to tracking report
  builtin-checkout.c: Remove unused prefix arguments in switch_branches path
  checkout: work from a subdirectory
  checkout: tone down the "forked status" diagnostic messages
  Clean up reporting differences on branch switch
  builtin-checkout.c: fix possible usage segfault
  checkout: notice when the switched branch is behind or forked
  Build in checkout
  Move code to clean up after a branch change to branch.c
  Library function to check for unmerged index entries
  Use diff -u instead of diff in t7201
  Move create_branch into a library file
  Build-in merge-recursive
  Add "skip_unmerged" option to unpack_trees.
  Discard "deleted" cache entries after using them to update the working tree
  Send unpack-trees debugging output to stderr
  Add flag to make unpack_trees() not print errors.
  ...

Conflicts:

	Makefile

2 files changed, 75 insertions, 16 deletions

diff --git a/t/t6029-merge-subtree.sh b/t/t6029-merge-subtree.sh
new file mode 100755
index 0000000000..3900a05082
--- /dev/null
+++ b/t/t6029-merge-subtree.sh
@@ -0,0 +1,32 @@
+#!/bin/sh
+
+test_description='subtree merge strategy'
+
+. ./test-lib.sh
+
+test_expect_success setup '
+
+	s="1 2 3 4 5 6 7 8"
+	for i in $s; do echo $i; done >hello &&
+	git add hello &&
+	git commit -m initial &&
+	git checkout -b side &&
+	echo >>hello world &&
+	git add hello &&
+	git commit -m second &&
+	git checkout master &&
+	for i in mundo $s; do echo $i; done >hello &&
+	git add hello &&
+	git commit -m master
+
+'
+
+test_expect_success 'subtree available and works like recursive' '
+
+	git merge -s subtree side &&
+	for i in mundo $s world; do echo $i; done >expect &&
+	diff -u expect hello
+
+'
+
+test_done
diff --git a/t/t7201-co.sh b/t/t7201-co.sh
index dbf1ace29e..724adef0bf 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" '
@@ -103,29 +103,22 @@ 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
 ) &&
-	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 +136,7 @@ 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 +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 current expect &&
+	diff -u current expect &&
 	git diff --cached two >current &&
 	! test -s current
 '
@@ -185,7 +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
 ) &&
-	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" &&
@@ -286,4 +279,38 @@ 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