t/t3310-notes-merge-manual-resolve.sh - git - Git at Google

 #!/bin/sh
 #
 # Copyright (c) 2010 Johan Herland
 #

 test_description='Test notes merging with manual conflict resolution'

 . ./test-lib.sh

 # Set up a notes merge scenario with different kinds of conflicts
 test_expect_success 'setup commits' '
 	test_commit 1st &&
 	test_commit 2nd &&
 	test_commit 3rd &&
 	test_commit 4th &&
 	test_commit 5th
 '

 commit_sha1=$(git rev-parse 1st^{commit})
 commit_sha2=$(git rev-parse 2nd^{commit})
 commit_sha3=$(git rev-parse 3rd^{commit})
 commit_sha4=$(git rev-parse 4th^{commit})
 commit_sha5=$(git rev-parse 5th^{commit})

 verify_notes () {
 	notes_ref="$1"
 	git -c core.notesRef="refs/notes/$notes_ref" notes |
 		sort >"output_notes_$notes_ref" &&
 	test_cmp "expect_notes_$notes_ref" "output_notes_$notes_ref" &&
 	git -c core.notesRef="refs/notes/$notes_ref" log --format="%H %s%n%N" \
 		>"output_log_$notes_ref" &&
 	test_cmp "expect_log_$notes_ref" "output_log_$notes_ref"
 }

 cat <<EOF | sort >expect_notes_x
 6e8e3febca3c2bb896704335cc4d0c34cb2f8715 $commit_sha4
 e5388c10860456ee60673025345fe2e153eb8cf8 $commit_sha3
 ceefa674873670e7ecd131814d909723cce2b669 $commit_sha2
 EOF

 cat >expect_log_x <<EOF
 $commit_sha5 5th

 $commit_sha4 4th
 x notes on 4th commit

 $commit_sha3 3rd
 x notes on 3rd commit

 $commit_sha2 2nd
 x notes on 2nd commit

 $commit_sha1 1st

 EOF

 test_expect_success 'setup merge base (x)' '
 	git config core.notesRef refs/notes/x &&
 	git notes add -m "x notes on 2nd commit" 2nd &&
 	git notes add -m "x notes on 3rd commit" 3rd &&
 	git notes add -m "x notes on 4th commit" 4th &&
 	verify_notes x
 '

 cat <<EOF | sort >expect_notes_y
 e2bfd06a37dd2031684a59a6e2b033e212239c78 $commit_sha4
 5772f42408c0dd6f097a7ca2d24de0e78d1c46b1 $commit_sha3
 b0a6021ec006d07e80e9b20ec9b444cbd9d560d3 $commit_sha1
 EOF

 cat >expect_log_y <<EOF
 $commit_sha5 5th

 $commit_sha4 4th
 y notes on 4th commit

 $commit_sha3 3rd
 y notes on 3rd commit

 $commit_sha2 2nd

 $commit_sha1 1st
 y notes on 1st commit

 EOF

 test_expect_success 'setup local branch (y)' '
 	git update-ref refs/notes/y refs/notes/x &&
 	git config core.notesRef refs/notes/y &&
 	git notes add -f -m "y notes on 1st commit" 1st &&
 	git notes remove 2nd &&
 	git notes add -f -m "y notes on 3rd commit" 3rd &&
 	git notes add -f -m "y notes on 4th commit" 4th &&
 	verify_notes y
 '

 cat <<EOF | sort >expect_notes_z
 cff59c793c20bb49a4e01bc06fb06bad642e0d54 $commit_sha4
 283b48219aee9a4105f6cab337e789065c82c2b9 $commit_sha2
 0a81da8956346e19bcb27a906f04af327e03e31b $commit_sha1
 EOF

 cat >expect_log_z <<EOF
 $commit_sha5 5th

 $commit_sha4 4th
 z notes on 4th commit

 $commit_sha3 3rd

 $commit_sha2 2nd
 z notes on 2nd commit

 $commit_sha1 1st
 z notes on 1st commit

 EOF

 test_expect_success 'setup remote branch (z)' '
 	git update-ref refs/notes/z refs/notes/x &&
 	git config core.notesRef refs/notes/z &&
 	git notes add -f -m "z notes on 1st commit" 1st &&
 	git notes add -f -m "z notes on 2nd commit" 2nd &&
 	git notes remove 3rd &&
 	git notes add -f -m "z notes on 4th commit" 4th &&
 	verify_notes z
 '

 # At this point, before merging z into y, we have the following status:
 #
 # commit | base/x  | local/y | remote/z | diff from x to y/z
 # -------|---------|---------|----------|---------------------------
 # 1st    | [none]  | b0a6021 | 0a81da8  | added     / added (diff)
 # 2nd    | ceefa67 | [none]  | 283b482  | removed   / changed
 # 3rd    | e5388c1 | 5772f42 | [none]   | changed   / removed
 # 4th    | 6e8e3fe | e2bfd06 | cff59c7  | changed   / changed (diff)
 # 5th    | [none]  | [none]  | [none]   | [none]

 cat <<EOF | sort >expect_conflicts
 $commit_sha1
 $commit_sha2
 $commit_sha3
 $commit_sha4
 EOF

 cat >expect_conflict_$commit_sha1 <<EOF
 <<<<<<< refs/notes/m
 y notes on 1st commit
 =======
 z notes on 1st commit
 >>>>>>> refs/notes/z
 EOF

 cat >expect_conflict_$commit_sha2 <<EOF
 z notes on 2nd commit
 EOF

 cat >expect_conflict_$commit_sha3 <<EOF
 y notes on 3rd commit
 EOF

 cat >expect_conflict_$commit_sha4 <<EOF
 <<<<<<< refs/notes/m
 y notes on 4th commit
 =======
 z notes on 4th commit
 >>>>>>> refs/notes/z
 EOF

 cp expect_notes_y expect_notes_m
 cp expect_log_y expect_log_m

 git rev-parse refs/notes/y > pre_merge_y
 git rev-parse refs/notes/z > pre_merge_z

 test_expect_success 'merge z into m (== y) with default ("manual") resolver => Conflicting 3-way merge' '
 	git update-ref refs/notes/m refs/notes/y &&
 	git config core.notesRef refs/notes/m &&
 	test_must_fail git notes merge z >output &&
 	# Output should point to where to resolve conflicts
 	grep -q "\\.git/NOTES_MERGE_WORKTREE" output &&
 	# Inspect merge conflicts
 	ls .git/NOTES_MERGE_WORKTREE >output_conflicts &&
 	test_cmp expect_conflicts output_conflicts &&
 	( for f in $(cat expect_conflicts); do
 		test_cmp "expect_conflict_$f" ".git/NOTES_MERGE_WORKTREE/$f" ||
 		exit 1
 	done ) &&
 	# Verify that current notes tree (pre-merge) has not changed (m == y)
 	verify_notes y &&
 	verify_notes m &&
 	test "$(git rev-parse refs/notes/m)" = "$(cat pre_merge_y)"
 '

 cat <<EOF | sort >expect_notes_z
 00494adecf2d9635a02fa431308d67993f853968 $commit_sha4
 283b48219aee9a4105f6cab337e789065c82c2b9 $commit_sha2
 0a81da8956346e19bcb27a906f04af327e03e31b $commit_sha1
 EOF

 cat >expect_log_z <<EOF
 $commit_sha5 5th

 $commit_sha4 4th
 z notes on 4th commit

 More z notes on 4th commit

 $commit_sha3 3rd

 $commit_sha2 2nd
 z notes on 2nd commit

 $commit_sha1 1st
 z notes on 1st commit

 EOF

 test_expect_success 'change notes in z' '
 	git notes --ref z append -m "More z notes on 4th commit" 4th &&
 	verify_notes z
 '

 test_expect_success 'cannot do merge w/conflicts when previous merge is unfinished' '
 	test -d .git/NOTES_MERGE_WORKTREE &&
 	test_must_fail git notes merge z >output 2>&1 &&
 	# Output should indicate what is wrong
 	grep -q "\\.git/NOTES_MERGE_\\* exists" output
 '

 # Setup non-conflicting merge between x and new notes ref w

 cat <<EOF | sort >expect_notes_w
 ceefa674873670e7ecd131814d909723cce2b669 $commit_sha2
 f75d1df88cbfe4258d49852f26cfc83f2ad4494b $commit_sha1
 EOF

 cat >expect_log_w <<EOF
 $commit_sha5 5th

 $commit_sha4 4th

 $commit_sha3 3rd

 $commit_sha2 2nd
 x notes on 2nd commit

 $commit_sha1 1st
 w notes on 1st commit

 EOF

 test_expect_success 'setup unrelated notes ref (w)' '
 	git config core.notesRef refs/notes/w &&
 	git notes add -m "w notes on 1st commit" 1st &&
 	git notes add -m "x notes on 2nd commit" 2nd &&
 	verify_notes w
 '

 cat <<EOF | sort >expect_notes_w
 6e8e3febca3c2bb896704335cc4d0c34cb2f8715 $commit_sha4
 e5388c10860456ee60673025345fe2e153eb8cf8 $commit_sha3
 ceefa674873670e7ecd131814d909723cce2b669 $commit_sha2
 f75d1df88cbfe4258d49852f26cfc83f2ad4494b $commit_sha1
 EOF

 cat >expect_log_w <<EOF
 $commit_sha5 5th

 $commit_sha4 4th
 x notes on 4th commit

 $commit_sha3 3rd
 x notes on 3rd commit

 $commit_sha2 2nd
 x notes on 2nd commit

 $commit_sha1 1st
 w notes on 1st commit

 EOF

 test_expect_success 'can do merge without conflicts even if previous merge is unfinished (x => w)' '
 	test -d .git/NOTES_MERGE_WORKTREE &&
 	git notes merge x &&
 	verify_notes w &&
 	# Verify that other notes refs has not changed (x and y)
 	verify_notes x &&
 	verify_notes y
 '

 cat <<EOF | sort >expect_notes_m
 021faa20e931fb48986ffc6282b4bb05553ac946 $commit_sha4
 5772f42408c0dd6f097a7ca2d24de0e78d1c46b1 $commit_sha3
 283b48219aee9a4105f6cab337e789065c82c2b9 $commit_sha2
 0a59e787e6d688aa6309e56e8c1b89431a0fc1c1 $commit_sha1
 EOF

 cat >expect_log_m <<EOF
 $commit_sha5 5th

 $commit_sha4 4th
 y and z notes on 4th commit

 $commit_sha3 3rd
 y notes on 3rd commit

 $commit_sha2 2nd
 z notes on 2nd commit

 $commit_sha1 1st
 y and z notes on 1st commit

 EOF

 test_expect_success 'finalize conflicting merge (z => m)' '
 	# Resolve conflicts and finalize merge
 	cat >.git/NOTES_MERGE_WORKTREE/$commit_sha1 <<EOF &&
 y and z notes on 1st commit
 EOF
 	cat >.git/NOTES_MERGE_WORKTREE/$commit_sha4 <<EOF &&
 y and z notes on 4th commit
 EOF
 	git notes merge --commit &&
 	# No .git/NOTES_MERGE_* files left
 	test_might_fail ls .git/NOTES_MERGE_* >output 2>/dev/null &&
 	test_cmp /dev/null output &&
 	# Merge commit has pre-merge y and pre-merge z as parents
 	test "$(git rev-parse refs/notes/m^1)" = "$(cat pre_merge_y)" &&
 	test "$(git rev-parse refs/notes/m^2)" = "$(cat pre_merge_z)" &&
 	# Merge commit mentions the notes refs merged
 	git log -1 --format=%B refs/notes/m > merge_commit_msg &&
 	grep -q refs/notes/m merge_commit_msg &&
 	grep -q refs/notes/z merge_commit_msg &&
 	# Merge commit mentions conflicting notes
 	grep -q "Conflicts" merge_commit_msg &&
 	( for sha1 in $(cat expect_conflicts); do
 		grep -q "$sha1" merge_commit_msg ||
 		exit 1
 	done ) &&
 	# Verify contents of merge result
 	verify_notes m &&
 	# Verify that other notes refs has not changed (w, x, y and z)
 	verify_notes w &&
 	verify_notes x &&
 	verify_notes y &&
 	verify_notes z
 '

 cat >expect_conflict_$commit_sha4 <<EOF
 <<<<<<< refs/notes/m
 y notes on 4th commit
 =======
 z notes on 4th commit

 More z notes on 4th commit
 >>>>>>> refs/notes/z
 EOF

 cp expect_notes_y expect_notes_m
 cp expect_log_y expect_log_m

 git rev-parse refs/notes/y > pre_merge_y
 git rev-parse refs/notes/z > pre_merge_z

 test_expect_success 'redo merge of z into m (== y) with default ("manual") resolver => Conflicting 3-way merge' '
 	git update-ref refs/notes/m refs/notes/y &&
 	git config core.notesRef refs/notes/m &&
 	test_must_fail git notes merge z >output &&
 	# Output should point to where to resolve conflicts
 	grep -q "\\.git/NOTES_MERGE_WORKTREE" output &&
 	# Inspect merge conflicts
 	ls .git/NOTES_MERGE_WORKTREE >output_conflicts &&
 	test_cmp expect_conflicts output_conflicts &&
 	( for f in $(cat expect_conflicts); do
 		test_cmp "expect_conflict_$f" ".git/NOTES_MERGE_WORKTREE/$f" ||
 		exit 1
 	done ) &&
 	# Verify that current notes tree (pre-merge) has not changed (m == y)
 	verify_notes y &&
 	verify_notes m &&
 	test "$(git rev-parse refs/notes/m)" = "$(cat pre_merge_y)"
 '

 test_expect_success 'abort notes merge' '
 	git notes merge --abort &&
 	# No .git/NOTES_MERGE_* files left
 	test_might_fail ls .git/NOTES_MERGE_* >output 2>/dev/null &&
 	test_cmp /dev/null output &&
 	# m has not moved (still == y)
 	test "$(git rev-parse refs/notes/m)" = "$(cat pre_merge_y)" &&
 	# Verify that other notes refs has not changed (w, x, y and z)
 	verify_notes w &&
 	verify_notes x &&
 	verify_notes y &&
 	verify_notes z
 '

 git rev-parse refs/notes/y > pre_merge_y
 git rev-parse refs/notes/z > pre_merge_z

 test_expect_success 'redo merge of z into m (== y) with default ("manual") resolver => Conflicting 3-way merge' '
 	test_must_fail git notes merge z >output &&
 	# Output should point to where to resolve conflicts
 	grep -q "\\.git/NOTES_MERGE_WORKTREE" output &&
 	# Inspect merge conflicts
 	ls .git/NOTES_MERGE_WORKTREE >output_conflicts &&
 	test_cmp expect_conflicts output_conflicts &&
 	( for f in $(cat expect_conflicts); do
 		test_cmp "expect_conflict_$f" ".git/NOTES_MERGE_WORKTREE/$f" ||
 		exit 1
 	done ) &&
 	# Verify that current notes tree (pre-merge) has not changed (m == y)
 	verify_notes y &&
 	verify_notes m &&
 	test "$(git rev-parse refs/notes/m)" = "$(cat pre_merge_y)"
 '

 cat <<EOF | sort >expect_notes_m
 304dfb4325cf243025b9957486eb605a9b51c199 $commit_sha5
 283b48219aee9a4105f6cab337e789065c82c2b9 $commit_sha2
 0a59e787e6d688aa6309e56e8c1b89431a0fc1c1 $commit_sha1
 EOF

 cat >expect_log_m <<EOF
 $commit_sha5 5th
 new note on 5th commit

 $commit_sha4 4th

 $commit_sha3 3rd

 $commit_sha2 2nd
 z notes on 2nd commit

 $commit_sha1 1st
 y and z notes on 1st commit

 EOF

 test_expect_success 'add + remove notes in finalized merge (z => m)' '
 	# Resolve one conflict
 	cat >.git/NOTES_MERGE_WORKTREE/$commit_sha1 <<EOF &&
 y and z notes on 1st commit
 EOF
 	# Remove another conflict
 	rm .git/NOTES_MERGE_WORKTREE/$commit_sha4 &&
 	# Remove a D/F conflict
 	rm .git/NOTES_MERGE_WORKTREE/$commit_sha3 &&
 	# Add a new note
 	echo "new note on 5th commit" > .git/NOTES_MERGE_WORKTREE/$commit_sha5 &&
 	# Finalize merge
 	git notes merge --commit &&
 	# No .git/NOTES_MERGE_* files left
 	test_might_fail ls .git/NOTES_MERGE_* >output 2>/dev/null &&
 	test_cmp /dev/null output &&
 	# Merge commit has pre-merge y and pre-merge z as parents
 	test "$(git rev-parse refs/notes/m^1)" = "$(cat pre_merge_y)" &&
 	test "$(git rev-parse refs/notes/m^2)" = "$(cat pre_merge_z)" &&
 	# Merge commit mentions the notes refs merged
 	git log -1 --format=%B refs/notes/m > merge_commit_msg &&
 	grep -q refs/notes/m merge_commit_msg &&
 	grep -q refs/notes/z merge_commit_msg &&
 	# Merge commit mentions conflicting notes
 	grep -q "Conflicts" merge_commit_msg &&
 	( for sha1 in $(cat expect_conflicts); do
 		grep -q "$sha1" merge_commit_msg ||
 		exit 1
 	done ) &&
 	# Verify contents of merge result
 	verify_notes m &&
 	# Verify that other notes refs has not changed (w, x, y and z)
 	verify_notes w &&
 	verify_notes x &&
 	verify_notes y &&
 	verify_notes z
 '

 cp expect_notes_y expect_notes_m
 cp expect_log_y expect_log_m

 test_expect_success 'redo merge of z into m (== y) with default ("manual") resolver => Conflicting 3-way merge' '
 	git update-ref refs/notes/m refs/notes/y &&
 	test_must_fail git notes merge z >output &&
 	# Output should point to where to resolve conflicts
 	grep -q "\\.git/NOTES_MERGE_WORKTREE" output &&
 	# Inspect merge conflicts
 	ls .git/NOTES_MERGE_WORKTREE >output_conflicts &&
 	test_cmp expect_conflicts output_conflicts &&
 	( for f in $(cat expect_conflicts); do
 		test_cmp "expect_conflict_$f" ".git/NOTES_MERGE_WORKTREE/$f" ||
 		exit 1
 	done ) &&
 	# Verify that current notes tree (pre-merge) has not changed (m == y)
 	verify_notes y &&
 	verify_notes m &&
 	test "$(git rev-parse refs/notes/m)" = "$(cat pre_merge_y)"
 '

 cp expect_notes_w expect_notes_m
 cp expect_log_w expect_log_m

 test_expect_success 'reset notes ref m to somewhere else (w)' '
 	git update-ref refs/notes/m refs/notes/w &&
 	verify_notes m &&
 	test "$(git rev-parse refs/notes/m)" = "$(git rev-parse refs/notes/w)"
 '

 test_expect_success 'fail to finalize conflicting merge if underlying ref has moved in the meantime (m != NOTES_MERGE_PARTIAL^1)' '
 	# Resolve conflicts
 	cat >.git/NOTES_MERGE_WORKTREE/$commit_sha1 <<EOF &&
 y and z notes on 1st commit
 EOF
 	cat >.git/NOTES_MERGE_WORKTREE/$commit_sha4 <<EOF &&
 y and z notes on 4th commit
 EOF
 	# Fail to finalize merge
 	test_must_fail git notes merge --commit >output 2>&1 &&
 	# .git/NOTES_MERGE_* must remain
 	test -f .git/NOTES_MERGE_PARTIAL &&
 	test -f .git/NOTES_MERGE_REF &&
 	test -f .git/NOTES_MERGE_WORKTREE/$commit_sha1 &&
 	test -f .git/NOTES_MERGE_WORKTREE/$commit_sha2 &&
 	test -f .git/NOTES_MERGE_WORKTREE/$commit_sha3 &&
 	test -f .git/NOTES_MERGE_WORKTREE/$commit_sha4 &&
 	# Refs are unchanged
 	test "$(git rev-parse refs/notes/m)" = "$(git rev-parse refs/notes/w)" &&
 	test "$(git rev-parse refs/notes/y)" = "$(git rev-parse NOTES_MERGE_PARTIAL^1)" &&
 	test "$(git rev-parse refs/notes/m)" != "$(git rev-parse NOTES_MERGE_PARTIAL^1)" &&
 	# Mention refs/notes/m, and its current and expected value in output
 	grep -q "refs/notes/m" output &&
 	grep -q "$(git rev-parse refs/notes/m)" output &&
 	grep -q "$(git rev-parse NOTES_MERGE_PARTIAL^1)" output &&
 	# Verify that other notes refs has not changed (w, x, y and z)
 	verify_notes w &&
 	verify_notes x &&
 	verify_notes y &&
 	verify_notes z
 '

 test_expect_success 'resolve situation by aborting the notes merge' '
 	git notes merge --abort &&
 	# No .git/NOTES_MERGE_* files left
 	test_might_fail ls .git/NOTES_MERGE_* >output 2>/dev/null &&
 	test_cmp /dev/null output &&
 	# m has not moved (still == w)
 	test "$(git rev-parse refs/notes/m)" = "$(git rev-parse refs/notes/w)" &&
 	# Verify that other notes refs has not changed (w, x, y and z)
 	verify_notes w &&
 	verify_notes x &&
 	verify_notes y &&
 	verify_notes z
 '

 cat >expect_notes <<EOF
 foo
 bar
 EOF

 test_expect_success 'switch cwd before committing notes merge' '
 	git notes add -m foo HEAD &&
 	git notes --ref=other add -m bar HEAD &&
 	test_must_fail git notes merge refs/notes/other &&
 	(
 		cd .git/NOTES_MERGE_WORKTREE &&
 		echo "foo" > $(git rev-parse HEAD) &&
 		echo "bar" >> $(git rev-parse HEAD) &&
 		git notes merge --commit
 	) &&
 	git notes show HEAD > actual_notes &&
 	test_cmp expect_notes actual_notes
 '

 test_done
	#!/bin/sh
	#
	# Copyright (c) 2010 Johan Herland
	#

	test_description='Test notes merging with manual conflict resolution'

	. ./test-lib.sh

	# Set up a notes merge scenario with different kinds of conflicts
	test_expect_success 'setup commits' '
	test_commit 1st &&
	test_commit 2nd &&
	test_commit 3rd &&
	test_commit 4th &&
	test_commit 5th
	'

	commit_sha1=$(git rev-parse 1st^{commit})
	commit_sha2=$(git rev-parse 2nd^{commit})
	commit_sha3=$(git rev-parse 3rd^{commit})
	commit_sha4=$(git rev-parse 4th^{commit})
	commit_sha5=$(git rev-parse 5th^{commit})

	verify_notes () {
	notes_ref="$1"
	git -c core.notesRef="refs/notes/$notes_ref" notes \|
	sort >"output_notes_$notes_ref" &&
	test_cmp "expect_notes_$notes_ref" "output_notes_$notes_ref" &&
	git -c core.notesRef="refs/notes/$notes_ref" log --format="%H %s%n%N" \
	>"output_log_$notes_ref" &&
	test_cmp "expect_log_$notes_ref" "output_log_$notes_ref"
	}

	cat <<EOF \| sort >expect_notes_x
	6e8e3febca3c2bb896704335cc4d0c34cb2f8715 $commit_sha4
	e5388c10860456ee60673025345fe2e153eb8cf8 $commit_sha3
	ceefa674873670e7ecd131814d909723cce2b669 $commit_sha2
	EOF

	cat >expect_log_x <<EOF
	$commit_sha5 5th

	$commit_sha4 4th
	x notes on 4th commit

	$commit_sha3 3rd
	x notes on 3rd commit

	$commit_sha2 2nd
	x notes on 2nd commit

	$commit_sha1 1st

	EOF

	test_expect_success 'setup merge base (x)' '
	git config core.notesRef refs/notes/x &&
	git notes add -m "x notes on 2nd commit" 2nd &&
	git notes add -m "x notes on 3rd commit" 3rd &&
	git notes add -m "x notes on 4th commit" 4th &&
	verify_notes x
	'

	cat <<EOF \| sort >expect_notes_y
	e2bfd06a37dd2031684a59a6e2b033e212239c78 $commit_sha4
	5772f42408c0dd6f097a7ca2d24de0e78d1c46b1 $commit_sha3
	b0a6021ec006d07e80e9b20ec9b444cbd9d560d3 $commit_sha1
	EOF

	cat >expect_log_y <<EOF
	$commit_sha5 5th

	$commit_sha4 4th
	y notes on 4th commit

	$commit_sha3 3rd
	y notes on 3rd commit

	$commit_sha2 2nd

	$commit_sha1 1st
	y notes on 1st commit

	EOF

	test_expect_success 'setup local branch (y)' '
	git update-ref refs/notes/y refs/notes/x &&
	git config core.notesRef refs/notes/y &&
	git notes add -f -m "y notes on 1st commit" 1st &&
	git notes remove 2nd &&
	git notes add -f -m "y notes on 3rd commit" 3rd &&
	git notes add -f -m "y notes on 4th commit" 4th &&
	verify_notes y
	'

	cat <<EOF \| sort >expect_notes_z
	cff59c793c20bb49a4e01bc06fb06bad642e0d54 $commit_sha4
	283b48219aee9a4105f6cab337e789065c82c2b9 $commit_sha2
	0a81da8956346e19bcb27a906f04af327e03e31b $commit_sha1
	EOF

	cat >expect_log_z <<EOF
	$commit_sha5 5th

	$commit_sha4 4th
	z notes on 4th commit

	$commit_sha3 3rd

	$commit_sha2 2nd
	z notes on 2nd commit

	$commit_sha1 1st
	z notes on 1st commit

	EOF

	test_expect_success 'setup remote branch (z)' '
	git update-ref refs/notes/z refs/notes/x &&
	git config core.notesRef refs/notes/z &&
	git notes add -f -m "z notes on 1st commit" 1st &&
	git notes add -f -m "z notes on 2nd commit" 2nd &&
	git notes remove 3rd &&
	git notes add -f -m "z notes on 4th commit" 4th &&
	verify_notes z
	'

	# At this point, before merging z into y, we have the following status:
	#
	# commit \| base/x \| local/y \| remote/z \| diff from x to y/z
	# -------\|---------\|---------\|----------\|---------------------------
	# 1st \| [none] \| b0a6021 \| 0a81da8 \| added / added (diff)
	# 2nd \| ceefa67 \| [none] \| 283b482 \| removed / changed
	# 3rd \| e5388c1 \| 5772f42 \| [none] \| changed / removed
	# 4th \| 6e8e3fe \| e2bfd06 \| cff59c7 \| changed / changed (diff)
	# 5th \| [none] \| [none] \| [none] \| [none]

	cat <<EOF \| sort >expect_conflicts
	$commit_sha1
	$commit_sha2
	$commit_sha3
	$commit_sha4
	EOF

	cat >expect_conflict_$commit_sha1 <<EOF
	<<<<<<< refs/notes/m
	y notes on 1st commit
	=======
	z notes on 1st commit
	>>>>>>> refs/notes/z
	EOF

	cat >expect_conflict_$commit_sha2 <<EOF
	z notes on 2nd commit
	EOF

	cat >expect_conflict_$commit_sha3 <<EOF
	y notes on 3rd commit
	EOF

	cat >expect_conflict_$commit_sha4 <<EOF
	<<<<<<< refs/notes/m
	y notes on 4th commit
	=======
	z notes on 4th commit
	>>>>>>> refs/notes/z
	EOF

	cp expect_notes_y expect_notes_m
	cp expect_log_y expect_log_m

	git rev-parse refs/notes/y > pre_merge_y
	git rev-parse refs/notes/z > pre_merge_z

	test_expect_success 'merge z into m (== y) with default ("manual") resolver => Conflicting 3-way merge' '
	git update-ref refs/notes/m refs/notes/y &&
	git config core.notesRef refs/notes/m &&
	test_must_fail git notes merge z >output &&
	# Output should point to where to resolve conflicts
	grep -q "\\.git/NOTES_MERGE_WORKTREE" output &&
	# Inspect merge conflicts
	ls .git/NOTES_MERGE_WORKTREE >output_conflicts &&
	test_cmp expect_conflicts output_conflicts &&
	( for f in $(cat expect_conflicts); do
	test_cmp "expect_conflict_$f" ".git/NOTES_MERGE_WORKTREE/$f" \|\|
	exit 1
	done ) &&
	# Verify that current notes tree (pre-merge) has not changed (m == y)
	verify_notes y &&
	verify_notes m &&
	test "$(git rev-parse refs/notes/m)" = "$(cat pre_merge_y)"
	'

	cat <<EOF \| sort >expect_notes_z
	00494adecf2d9635a02fa431308d67993f853968 $commit_sha4
	283b48219aee9a4105f6cab337e789065c82c2b9 $commit_sha2
	0a81da8956346e19bcb27a906f04af327e03e31b $commit_sha1
	EOF

	cat >expect_log_z <<EOF
	$commit_sha5 5th

	$commit_sha4 4th
	z notes on 4th commit

	More z notes on 4th commit

	$commit_sha3 3rd

	$commit_sha2 2nd
	z notes on 2nd commit

	$commit_sha1 1st
	z notes on 1st commit

	EOF

	test_expect_success 'change notes in z' '
	git notes --ref z append -m "More z notes on 4th commit" 4th &&
	verify_notes z
	'

	test_expect_success 'cannot do merge w/conflicts when previous merge is unfinished' '
	test -d .git/NOTES_MERGE_WORKTREE &&
	test_must_fail git notes merge z >output 2>&1 &&
	# Output should indicate what is wrong
	grep -q "\\.git/NOTES_MERGE_\\* exists" output
	'

	# Setup non-conflicting merge between x and new notes ref w

	cat <<EOF \| sort >expect_notes_w
	ceefa674873670e7ecd131814d909723cce2b669 $commit_sha2
	f75d1df88cbfe4258d49852f26cfc83f2ad4494b $commit_sha1
	EOF

	cat >expect_log_w <<EOF
	$commit_sha5 5th

	$commit_sha4 4th

	$commit_sha3 3rd

	$commit_sha2 2nd
	x notes on 2nd commit

	$commit_sha1 1st
	w notes on 1st commit

	EOF

	test_expect_success 'setup unrelated notes ref (w)' '
	git config core.notesRef refs/notes/w &&
	git notes add -m "w notes on 1st commit" 1st &&
	git notes add -m "x notes on 2nd commit" 2nd &&
	verify_notes w
	'

	cat <<EOF \| sort >expect_notes_w
	6e8e3febca3c2bb896704335cc4d0c34cb2f8715 $commit_sha4
	e5388c10860456ee60673025345fe2e153eb8cf8 $commit_sha3
	ceefa674873670e7ecd131814d909723cce2b669 $commit_sha2
	f75d1df88cbfe4258d49852f26cfc83f2ad4494b $commit_sha1
	EOF

	cat >expect_log_w <<EOF
	$commit_sha5 5th

	$commit_sha4 4th
	x notes on 4th commit

	$commit_sha3 3rd
	x notes on 3rd commit

	$commit_sha2 2nd
	x notes on 2nd commit

	$commit_sha1 1st
	w notes on 1st commit

	EOF

	test_expect_success 'can do merge without conflicts even if previous merge is unfinished (x => w)' '
	test -d .git/NOTES_MERGE_WORKTREE &&
	git notes merge x &&
	verify_notes w &&
	# Verify that other notes refs has not changed (x and y)
	verify_notes x &&
	verify_notes y
	'

	cat <<EOF \| sort >expect_notes_m
	021faa20e931fb48986ffc6282b4bb05553ac946 $commit_sha4
	5772f42408c0dd6f097a7ca2d24de0e78d1c46b1 $commit_sha3
	283b48219aee9a4105f6cab337e789065c82c2b9 $commit_sha2
	0a59e787e6d688aa6309e56e8c1b89431a0fc1c1 $commit_sha1
	EOF

	cat >expect_log_m <<EOF
	$commit_sha5 5th

	$commit_sha4 4th
	y and z notes on 4th commit

	$commit_sha3 3rd
	y notes on 3rd commit

	$commit_sha2 2nd
	z notes on 2nd commit

	$commit_sha1 1st
	y and z notes on 1st commit

	EOF

	test_expect_success 'finalize conflicting merge (z => m)' '
	# Resolve conflicts and finalize merge
	cat >.git/NOTES_MERGE_WORKTREE/$commit_sha1 <<EOF &&
	y and z notes on 1st commit
	EOF
	cat >.git/NOTES_MERGE_WORKTREE/$commit_sha4 <<EOF &&
	y and z notes on 4th commit
	EOF
	git notes merge --commit &&
	# No .git/NOTES_MERGE_* files left
	test_might_fail ls .git/NOTES_MERGE_* >output 2>/dev/null &&
	test_cmp /dev/null output &&
	# Merge commit has pre-merge y and pre-merge z as parents
	test "$(git rev-parse refs/notes/m^1)" = "$(cat pre_merge_y)" &&
	test "$(git rev-parse refs/notes/m^2)" = "$(cat pre_merge_z)" &&
	# Merge commit mentions the notes refs merged
	git log -1 --format=%B refs/notes/m > merge_commit_msg &&
	grep -q refs/notes/m merge_commit_msg &&
	grep -q refs/notes/z merge_commit_msg &&
	# Merge commit mentions conflicting notes
	grep -q "Conflicts" merge_commit_msg &&
	( for sha1 in $(cat expect_conflicts); do
	grep -q "$sha1" merge_commit_msg \|\|
	exit 1
	done ) &&
	# Verify contents of merge result
	verify_notes m &&
	# Verify that other notes refs has not changed (w, x, y and z)
	verify_notes w &&
	verify_notes x &&
	verify_notes y &&
	verify_notes z
	'

	cat >expect_conflict_$commit_sha4 <<EOF
	<<<<<<< refs/notes/m
	y notes on 4th commit
	=======
	z notes on 4th commit

	More z notes on 4th commit
	>>>>>>> refs/notes/z
	EOF

	cp expect_notes_y expect_notes_m
	cp expect_log_y expect_log_m

	git rev-parse refs/notes/y > pre_merge_y
	git rev-parse refs/notes/z > pre_merge_z

	test_expect_success 'redo merge of z into m (== y) with default ("manual") resolver => Conflicting 3-way merge' '
	git update-ref refs/notes/m refs/notes/y &&
	git config core.notesRef refs/notes/m &&
	test_must_fail git notes merge z >output &&
	# Output should point to where to resolve conflicts
	grep -q "\\.git/NOTES_MERGE_WORKTREE" output &&
	# Inspect merge conflicts
	ls .git/NOTES_MERGE_WORKTREE >output_conflicts &&
	test_cmp expect_conflicts output_conflicts &&
	( for f in $(cat expect_conflicts); do
	test_cmp "expect_conflict_$f" ".git/NOTES_MERGE_WORKTREE/$f" \|\|
	exit 1
	done ) &&
	# Verify that current notes tree (pre-merge) has not changed (m == y)
	verify_notes y &&
	verify_notes m &&
	test "$(git rev-parse refs/notes/m)" = "$(cat pre_merge_y)"
	'

	test_expect_success 'abort notes merge' '
	git notes merge --abort &&
	# No .git/NOTES_MERGE_* files left
	test_might_fail ls .git/NOTES_MERGE_* >output 2>/dev/null &&
	test_cmp /dev/null output &&
	# m has not moved (still == y)
	test "$(git rev-parse refs/notes/m)" = "$(cat pre_merge_y)" &&
	# Verify that other notes refs has not changed (w, x, y and z)
	verify_notes w &&
	verify_notes x &&
	verify_notes y &&
	verify_notes z
	'

	git rev-parse refs/notes/y > pre_merge_y
	git rev-parse refs/notes/z > pre_merge_z

	test_expect_success 'redo merge of z into m (== y) with default ("manual") resolver => Conflicting 3-way merge' '
	test_must_fail git notes merge z >output &&
	# Output should point to where to resolve conflicts
	grep -q "\\.git/NOTES_MERGE_WORKTREE" output &&
	# Inspect merge conflicts
	ls .git/NOTES_MERGE_WORKTREE >output_conflicts &&
	test_cmp expect_conflicts output_conflicts &&
	( for f in $(cat expect_conflicts); do
	test_cmp "expect_conflict_$f" ".git/NOTES_MERGE_WORKTREE/$f" \|\|
	exit 1
	done ) &&
	# Verify that current notes tree (pre-merge) has not changed (m == y)
	verify_notes y &&
	verify_notes m &&
	test "$(git rev-parse refs/notes/m)" = "$(cat pre_merge_y)"
	'

	cat <<EOF \| sort >expect_notes_m
	304dfb4325cf243025b9957486eb605a9b51c199 $commit_sha5
	283b48219aee9a4105f6cab337e789065c82c2b9 $commit_sha2
	0a59e787e6d688aa6309e56e8c1b89431a0fc1c1 $commit_sha1
	EOF

	cat >expect_log_m <<EOF
	$commit_sha5 5th
	new note on 5th commit

	$commit_sha4 4th

	$commit_sha3 3rd

	$commit_sha2 2nd
	z notes on 2nd commit

	$commit_sha1 1st
	y and z notes on 1st commit

	EOF

	test_expect_success 'add + remove notes in finalized merge (z => m)' '
	# Resolve one conflict
	cat >.git/NOTES_MERGE_WORKTREE/$commit_sha1 <<EOF &&
	y and z notes on 1st commit
	EOF
	# Remove another conflict
	rm .git/NOTES_MERGE_WORKTREE/$commit_sha4 &&
	# Remove a D/F conflict
	rm .git/NOTES_MERGE_WORKTREE/$commit_sha3 &&
	# Add a new note
	echo "new note on 5th commit" > .git/NOTES_MERGE_WORKTREE/$commit_sha5 &&
	# Finalize merge
	git notes merge --commit &&
	# No .git/NOTES_MERGE_* files left
	test_might_fail ls .git/NOTES_MERGE_* >output 2>/dev/null &&
	test_cmp /dev/null output &&
	# Merge commit has pre-merge y and pre-merge z as parents
	test "$(git rev-parse refs/notes/m^1)" = "$(cat pre_merge_y)" &&
	test "$(git rev-parse refs/notes/m^2)" = "$(cat pre_merge_z)" &&
	# Merge commit mentions the notes refs merged
	git log -1 --format=%B refs/notes/m > merge_commit_msg &&
	grep -q refs/notes/m merge_commit_msg &&
	grep -q refs/notes/z merge_commit_msg &&
	# Merge commit mentions conflicting notes
	grep -q "Conflicts" merge_commit_msg &&
	( for sha1 in $(cat expect_conflicts); do
	grep -q "$sha1" merge_commit_msg \|\|
	exit 1
	done ) &&
	# Verify contents of merge result
	verify_notes m &&
	# Verify that other notes refs has not changed (w, x, y and z)
	verify_notes w &&
	verify_notes x &&
	verify_notes y &&
	verify_notes z
	'

	cp expect_notes_y expect_notes_m
	cp expect_log_y expect_log_m

	test_expect_success 'redo merge of z into m (== y) with default ("manual") resolver => Conflicting 3-way merge' '
	git update-ref refs/notes/m refs/notes/y &&
	test_must_fail git notes merge z >output &&
	# Output should point to where to resolve conflicts
	grep -q "\\.git/NOTES_MERGE_WORKTREE" output &&
	# Inspect merge conflicts
	ls .git/NOTES_MERGE_WORKTREE >output_conflicts &&
	test_cmp expect_conflicts output_conflicts &&
	( for f in $(cat expect_conflicts); do
	test_cmp "expect_conflict_$f" ".git/NOTES_MERGE_WORKTREE/$f" \|\|
	exit 1
	done ) &&
	# Verify that current notes tree (pre-merge) has not changed (m == y)
	verify_notes y &&
	verify_notes m &&
	test "$(git rev-parse refs/notes/m)" = "$(cat pre_merge_y)"
	'

	cp expect_notes_w expect_notes_m
	cp expect_log_w expect_log_m

	test_expect_success 'reset notes ref m to somewhere else (w)' '
	git update-ref refs/notes/m refs/notes/w &&
	verify_notes m &&
	test "$(git rev-parse refs/notes/m)" = "$(git rev-parse refs/notes/w)"
	'

	test_expect_success 'fail to finalize conflicting merge if underlying ref has moved in the meantime (m != NOTES_MERGE_PARTIAL^1)' '
	# Resolve conflicts
	cat >.git/NOTES_MERGE_WORKTREE/$commit_sha1 <<EOF &&
	y and z notes on 1st commit
	EOF
	cat >.git/NOTES_MERGE_WORKTREE/$commit_sha4 <<EOF &&
	y and z notes on 4th commit
	EOF
	# Fail to finalize merge
	test_must_fail git notes merge --commit >output 2>&1 &&
	# .git/NOTES_MERGE_* must remain
	test -f .git/NOTES_MERGE_PARTIAL &&
	test -f .git/NOTES_MERGE_REF &&
	test -f .git/NOTES_MERGE_WORKTREE/$commit_sha1 &&
	test -f .git/NOTES_MERGE_WORKTREE/$commit_sha2 &&
	test -f .git/NOTES_MERGE_WORKTREE/$commit_sha3 &&
	test -f .git/NOTES_MERGE_WORKTREE/$commit_sha4 &&
	# Refs are unchanged
	test "$(git rev-parse refs/notes/m)" = "$(git rev-parse refs/notes/w)" &&
	test "$(git rev-parse refs/notes/y)" = "$(git rev-parse NOTES_MERGE_PARTIAL^1)" &&
	test "$(git rev-parse refs/notes/m)" != "$(git rev-parse NOTES_MERGE_PARTIAL^1)" &&
	# Mention refs/notes/m, and its current and expected value in output
	grep -q "refs/notes/m" output &&
	grep -q "$(git rev-parse refs/notes/m)" output &&
	grep -q "$(git rev-parse NOTES_MERGE_PARTIAL^1)" output &&
	# Verify that other notes refs has not changed (w, x, y and z)
	verify_notes w &&
	verify_notes x &&
	verify_notes y &&
	verify_notes z
	'

	test_expect_success 'resolve situation by aborting the notes merge' '
	git notes merge --abort &&
	# No .git/NOTES_MERGE_* files left
	test_might_fail ls .git/NOTES_MERGE_* >output 2>/dev/null &&
	test_cmp /dev/null output &&
	# m has not moved (still == w)
	test "$(git rev-parse refs/notes/m)" = "$(git rev-parse refs/notes/w)" &&
	# Verify that other notes refs has not changed (w, x, y and z)
	verify_notes w &&
	verify_notes x &&
	verify_notes y &&
	verify_notes z
	'

	cat >expect_notes <<EOF
	foo
	bar
	EOF

	test_expect_success 'switch cwd before committing notes merge' '
	git notes add -m foo HEAD &&
	git notes --ref=other add -m bar HEAD &&
	test_must_fail git notes merge refs/notes/other &&
	(
	cd .git/NOTES_MERGE_WORKTREE &&
	echo "foo" > $(git rev-parse HEAD) &&
	echo "bar" >> $(git rev-parse HEAD) &&
	git notes merge --commit
	) &&
	git notes show HEAD > actual_notes &&
	test_cmp expect_notes actual_notes
	'

	test_done