#!/bin/sh
#
# Copyright (c) 2013 Ramkumar Ramachandra
#

test_description='git rebase --autostash tests'
. ./test-lib.sh

test_expect_success setup '
	echo hello-world >file0 &&
	git add . &&
	test_tick &&
	git commit -m "initial commit" &&
	git checkout -b feature-branch &&
	echo another-hello >file1 &&
	echo goodbye >file2 &&
	git add . &&
	test_tick &&
	git commit -m "second commit" &&
	echo final-goodbye >file3 &&
	git add . &&
	test_tick &&
	git commit -m "third commit" &&
	git checkout -b unrelated-onto-branch master &&
	echo unrelated >file4 &&
	git add . &&
	test_tick &&
	git commit -m "unrelated commit" &&
	git checkout -b related-onto-branch master &&
	echo conflicting-change >file2 &&
	git add . &&
	test_tick &&
	git commit -m "related commit"
'

create_expected_success_am () {
	cat >expected <<-EOF
	$(grep "^Created autostash: [0-9a-f][0-9a-f]*\$" actual)
	HEAD is now at $(git rev-parse --short feature-branch) third commit
	First, rewinding head to replay your work on top of it...
	Applying: second commit
	Applying: third commit
	Applied autostash.
	EOF
}

create_expected_success_interactive () {
	q_to_cr >expected <<-EOF
	$(grep "^Created autostash: [0-9a-f][0-9a-f]*\$" actual)
	HEAD is now at $(git rev-parse --short feature-branch) third commit
	Rebasing (1/2)QRebasing (2/2)QApplied autostash.
	Successfully rebased and updated refs/heads/rebased-feature-branch.
	EOF
}

create_expected_success_merge () {
	cat >expected <<-EOF
	$(grep "^Created autostash: [0-9a-f][0-9a-f]*\$" actual)
	HEAD is now at $(git rev-parse --short feature-branch) third commit
	First, rewinding head to replay your work on top of it...
	Merging unrelated-onto-branch with HEAD~1
	Merging:
	$(git rev-parse --short unrelated-onto-branch) unrelated commit
	$(git rev-parse --short feature-branch^) second commit
	found 1 common ancestor:
	$(git rev-parse --short feature-branch~2) initial commit
	[detached HEAD $(git rev-parse --short rebased-feature-branch~1)] second commit
	 Author: A U Thor <author@example.com>
	 Date: Thu Apr 7 15:14:13 2005 -0700
	 2 files changed, 2 insertions(+)
	 create mode 100644 file1
	 create mode 100644 file2
	Committed: 0001 second commit
	Merging unrelated-onto-branch with HEAD~0
	Merging:
	$(git rev-parse --short rebased-feature-branch~1) second commit
	$(git rev-parse --short feature-branch) third commit
	found 1 common ancestor:
	$(git rev-parse --short feature-branch~1) second commit
	[detached HEAD $(git rev-parse --short rebased-feature-branch)] third commit
	 Author: A U Thor <author@example.com>
	 Date: Thu Apr 7 15:15:13 2005 -0700
	 1 file changed, 1 insertion(+)
	 create mode 100644 file3
	Committed: 0002 third commit
	All done.
	Applied autostash.
	EOF
}

create_expected_failure_am () {
	cat >expected <<-EOF
	$(grep "^Created autostash: [0-9a-f][0-9a-f]*\$" actual)
	HEAD is now at $(git rev-parse --short feature-branch) third commit
	First, rewinding head to replay your work on top of it...
	Applying: second commit
	Applying: third commit
	Applying autostash resulted in conflicts.
	Your changes are safe in the stash.
	You can run "git stash pop" or "git stash drop" at any time.
	EOF
}

create_expected_failure_interactive () {
	q_to_cr >expected <<-EOF
	$(grep "^Created autostash: [0-9a-f][0-9a-f]*\$" actual)
	HEAD is now at $(git rev-parse --short feature-branch) third commit
	Rebasing (1/2)QRebasing (2/2)QApplying autostash resulted in conflicts.
	Your changes are safe in the stash.
	You can run "git stash pop" or "git stash drop" at any time.
	Successfully rebased and updated refs/heads/rebased-feature-branch.
	EOF
}

create_expected_failure_merge () {
	cat >expected <<-EOF
	$(grep "^Created autostash: [0-9a-f][0-9a-f]*\$" actual)
	HEAD is now at $(git rev-parse --short feature-branch) third commit
	First, rewinding head to replay your work on top of it...
	Merging unrelated-onto-branch with HEAD~1
	Merging:
	$(git rev-parse --short unrelated-onto-branch) unrelated commit
	$(git rev-parse --short feature-branch^) second commit
	found 1 common ancestor:
	$(git rev-parse --short feature-branch~2) initial commit
	[detached HEAD $(git rev-parse --short rebased-feature-branch~1)] second commit
	 Author: A U Thor <author@example.com>
	 Date: Thu Apr 7 15:14:13 2005 -0700
	 2 files changed, 2 insertions(+)
	 create mode 100644 file1
	 create mode 100644 file2
	Committed: 0001 second commit
	Merging unrelated-onto-branch with HEAD~0
	Merging:
	$(git rev-parse --short rebased-feature-branch~1) second commit
	$(git rev-parse --short feature-branch) third commit
	found 1 common ancestor:
	$(git rev-parse --short feature-branch~1) second commit
	[detached HEAD $(git rev-parse --short rebased-feature-branch)] third commit
	 Author: A U Thor <author@example.com>
	 Date: Thu Apr 7 15:15:13 2005 -0700
	 1 file changed, 1 insertion(+)
	 create mode 100644 file3
	Committed: 0002 third commit
	All done.
	Applying autostash resulted in conflicts.
	Your changes are safe in the stash.
	You can run "git stash pop" or "git stash drop" at any time.
	EOF
}

testrebase () {
	type=$1
	dotest=$2

	test_expect_success "rebase$type: dirty worktree, --no-autostash" '
		test_config rebase.autostash true &&
		git reset --hard &&
		git checkout -b rebased-feature-branch feature-branch &&
		test_when_finished git branch -D rebased-feature-branch &&
		test_when_finished git checkout feature-branch &&
		echo dirty >>file3 &&
		test_must_fail git rebase$type --no-autostash unrelated-onto-branch
	'

	test_expect_success "rebase$type: dirty worktree, non-conflicting rebase" '
		test_config rebase.autostash true &&
		git reset --hard &&
		git checkout -b rebased-feature-branch feature-branch &&
		echo dirty >>file3 &&
		git rebase$type unrelated-onto-branch >actual 2>&1 &&
		grep unrelated file4 &&
		grep dirty file3 &&
		git checkout feature-branch
	'

	test_expect_success "rebase$type --autostash: check output" '
		test_when_finished git branch -D rebased-feature-branch &&
		suffix=${type#\ --} && suffix=${suffix:-am} &&
		create_expected_success_$suffix &&
		test_i18ncmp expected actual
	'

	test_expect_success "rebase$type: dirty index, non-conflicting rebase" '
		test_config rebase.autostash true &&
		git reset --hard &&
		git checkout -b rebased-feature-branch feature-branch &&
		test_when_finished git branch -D rebased-feature-branch &&
		echo dirty >>file3 &&
		git add file3 &&
		git rebase$type unrelated-onto-branch &&
		grep unrelated file4 &&
		grep dirty file3 &&
		git checkout feature-branch
	'

	test_expect_success "rebase$type: conflicting rebase" '
		test_config rebase.autostash true &&
		git reset --hard &&
		git checkout -b rebased-feature-branch feature-branch &&
		test_when_finished git branch -D rebased-feature-branch &&
		echo dirty >>file3 &&
		test_must_fail git rebase$type related-onto-branch &&
		test_path_is_file $dotest/autostash &&
		! grep dirty file3 &&
		rm -rf $dotest &&
		git reset --hard &&
		git checkout feature-branch
	'

	test_expect_success "rebase$type: --continue" '
		test_config rebase.autostash true &&
		git reset --hard &&
		git checkout -b rebased-feature-branch feature-branch &&
		test_when_finished git branch -D rebased-feature-branch &&
		echo dirty >>file3 &&
		test_must_fail git rebase$type related-onto-branch &&
		test_path_is_file $dotest/autostash &&
		! grep dirty file3 &&
		echo "conflicting-plus-goodbye" >file2 &&
		git add file2 &&
		git rebase --continue &&
		test_path_is_missing $dotest/autostash &&
		grep dirty file3 &&
		git checkout feature-branch
	'

	test_expect_success "rebase$type: --skip" '
		test_config rebase.autostash true &&
		git reset --hard &&
		git checkout -b rebased-feature-branch feature-branch &&
		test_when_finished git branch -D rebased-feature-branch &&
		echo dirty >>file3 &&
		test_must_fail git rebase$type related-onto-branch &&
		test_path_is_file $dotest/autostash &&
		! grep dirty file3 &&
		git rebase --skip &&
		test_path_is_missing $dotest/autostash &&
		grep dirty file3 &&
		git checkout feature-branch
	'

	test_expect_success "rebase$type: --abort" '
		test_config rebase.autostash true &&
		git reset --hard &&
		git checkout -b rebased-feature-branch feature-branch &&
		test_when_finished git branch -D rebased-feature-branch &&
		echo dirty >>file3 &&
		test_must_fail git rebase$type related-onto-branch &&
		test_path_is_file $dotest/autostash &&
		! grep dirty file3 &&
		git rebase --abort &&
		test_path_is_missing $dotest/autostash &&
		grep dirty file3 &&
		git checkout feature-branch
	'

	test_expect_success "rebase$type: non-conflicting rebase, conflicting stash" '
		test_config rebase.autostash true &&
		git reset --hard &&
		git checkout -b rebased-feature-branch feature-branch &&
		echo dirty >file4 &&
		git add file4 &&
		git rebase$type unrelated-onto-branch >actual 2>&1 &&
		test_path_is_missing $dotest &&
		git reset --hard &&
		grep unrelated file4 &&
		! grep dirty file4 &&
		git checkout feature-branch &&
		git stash pop &&
		grep dirty file4
	'

	test_expect_success "rebase$type: check output with conflicting stash" '
		test_when_finished git branch -D rebased-feature-branch &&
		suffix=${type#\ --} && suffix=${suffix:-am} &&
		create_expected_failure_$suffix &&
		test_i18ncmp expected actual
	'
}

test_expect_success "rebase: fast-forward rebase" '
	test_config rebase.autostash true &&
	git reset --hard &&
	git checkout -b behind-feature-branch feature-branch~1 &&
	test_when_finished git branch -D behind-feature-branch &&
	echo dirty >>file1 &&
	git rebase feature-branch &&
	grep dirty file1 &&
	git checkout feature-branch
'

test_expect_success "rebase: noop rebase" '
	test_config rebase.autostash true &&
	git reset --hard &&
	git checkout -b same-feature-branch feature-branch &&
	test_when_finished git branch -D same-feature-branch &&
	echo dirty >>file1 &&
	git rebase feature-branch &&
	grep dirty file1 &&
	git checkout feature-branch
'

testrebase "" .git/rebase-apply
testrebase " --merge" .git/rebase-merge
testrebase " --interactive" .git/rebase-merge

test_expect_success 'abort rebase -i with --autostash' '
	test_when_finished "git reset --hard" &&
	echo uncommitted-content >file0 &&
	(
		write_script abort-editor.sh <<-\EOF &&
			echo >"$1"
		EOF
		test_set_editor "$(pwd)/abort-editor.sh" &&
		test_must_fail git rebase -i --autostash HEAD^ &&
		rm -f abort-editor.sh
	) &&
	echo uncommitted-content >expected &&
	test_cmp expected file0
'

test_expect_success 'restore autostash on editor failure' '
	test_when_finished "git reset --hard" &&
	echo uncommitted-content >file0 &&
	(
		test_set_editor "false" &&
		test_must_fail git rebase -i --autostash HEAD^
	) &&
	echo uncommitted-content >expected &&
	test_cmp expected file0
'

test_expect_success 'autostash is saved on editor failure with conflict' '
	test_when_finished "git reset --hard" &&
	echo uncommitted-content >file0 &&
	(
		write_script abort-editor.sh <<-\EOF &&
			echo conflicting-content >file0
			exit 1
		EOF
		test_set_editor "$(pwd)/abort-editor.sh" &&
		test_must_fail git rebase -i --autostash HEAD^ &&
		rm -f abort-editor.sh
	) &&
	echo conflicting-content >expected &&
	test_cmp expected file0 &&
	git checkout file0 &&
	git stash pop &&
	echo uncommitted-content >expected &&
	test_cmp expected file0
'

test_done