1 files changed, 623 insertions, 0 deletions
diff --git a/third_party/git/t/t2400-worktree-add.sh b/third_party/git/t/t2400-worktree-add.sh
new file mode 100755
index 000000000000..5a7495474aa8
--- /dev/null
+++ b/third_party/git/t/t2400-worktree-add.sh
@@ -0,0 +1,623 @@
+#!/bin/sh
+
+test_description='test git worktree add'
+
+. ./test-lib.sh
+
+. "$TEST_DIRECTORY"/lib-rebase.sh
+
+test_expect_success 'setup' '
+	test_commit init
+'
+
+test_expect_success '"add" an existing worktree' '
+	mkdir -p existing/subtree &&
+	test_must_fail git worktree add --detach existing master
+'
+
+test_expect_success '"add" an existing empty worktree' '
+	mkdir existing_empty &&
+	git worktree add --detach existing_empty master
+'
+
+test_expect_success '"add" using shorthand - fails when no previous branch' '
+	test_must_fail git worktree add existing_short -
+'
+
+test_expect_success '"add" using - shorthand' '
+	git checkout -b newbranch &&
+	echo hello >myworld &&
+	git add myworld &&
+	git commit -m myworld &&
+	git checkout master &&
+	git worktree add short-hand - &&
+	echo refs/heads/newbranch >expect &&
+	git -C short-hand rev-parse --symbolic-full-name HEAD >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success '"add" refuses to checkout locked branch' '
+	test_must_fail git worktree add zere master &&
+	! test -d zere &&
+	! test -d .git/worktrees/zere
+'
+
+test_expect_success 'checking out paths not complaining about linked checkouts' '
+	(
+	cd existing_empty &&
+	echo dirty >>init.t &&
+	git checkout master -- init.t
+	)
+'
+
+test_expect_success '"add" worktree' '
+	git rev-parse HEAD >expect &&
+	git worktree add --detach here master &&
+	(
+		cd here &&
+		test_cmp ../init.t init.t &&
+		test_must_fail git symbolic-ref HEAD &&
+		git rev-parse HEAD >actual &&
+		test_cmp ../expect actual &&
+		git fsck
+	)
+'
+
+test_expect_success '"add" worktree with lock' '
+	git rev-parse HEAD >expect &&
+	git worktree add --detach --lock here-with-lock master &&
+	test -f .git/worktrees/here-with-lock/locked
+'
+
+test_expect_success '"add" worktree from a subdir' '
+	(
+		mkdir sub &&
+		cd sub &&
+		git worktree add --detach here master &&
+		cd here &&
+		test_cmp ../../init.t init.t
+	)
+'
+
+test_expect_success '"add" from a linked checkout' '
+	(
+		cd here &&
+		git worktree add --detach nested-here master &&
+		cd nested-here &&
+		git fsck
+	)
+'
+
+test_expect_success '"add" worktree creating new branch' '
+	git worktree add -b newmaster there master &&
+	(
+		cd there &&
+		test_cmp ../init.t init.t &&
+		git symbolic-ref HEAD >actual &&
+		echo refs/heads/newmaster >expect &&
+		test_cmp expect actual &&
+		git fsck
+	)
+'
+
+test_expect_success 'die the same branch is already checked out' '
+	(
+		cd here &&
+		test_must_fail git checkout newmaster
+	)
+'
+
+test_expect_success SYMLINKS 'die the same branch is already checked out (symlink)' '
+	head=$(git -C there rev-parse --git-path HEAD) &&
+	ref=$(git -C there symbolic-ref HEAD) &&
+	rm "$head" &&
+	ln -s "$ref" "$head" &&
+	test_must_fail git -C here checkout newmaster
+'
+
+test_expect_success 'not die the same branch is already checked out' '
+	(
+		cd here &&
+		git worktree add --force anothernewmaster newmaster
+	)
+'
+
+test_expect_success 'not die on re-checking out current branch' '
+	(
+		cd there &&
+		git checkout newmaster
+	)
+'
+
+test_expect_success '"add" from a bare repo' '
+	(
+		git clone --bare . bare &&
+		cd bare &&
+		git worktree add -b bare-master ../there2 master
+	)
+'
+
+test_expect_success 'checkout from a bare repo without "add"' '
+	(
+		cd bare &&
+		test_must_fail git checkout master
+	)
+'
+
+test_expect_success '"add" default branch of a bare repo' '
+	(
+		git clone --bare . bare2 &&
+		cd bare2 &&
+		git worktree add ../there3 master
+	)
+'
+
+test_expect_success 'checkout with grafts' '
+	test_when_finished rm .git/info/grafts &&
+	test_commit abc &&
+	SHA1=$(git rev-parse HEAD) &&
+	test_commit def &&
+	test_commit xyz &&
+	echo "$(git rev-parse HEAD) $SHA1" >.git/info/grafts &&
+	cat >expected <<-\EOF &&
+	xyz
+	abc
+	EOF
+	git log --format=%s -2 >actual &&
+	test_cmp expected actual &&
+	git worktree add --detach grafted master &&
+	git --git-dir=grafted/.git log --format=%s -2 >actual &&
+	test_cmp expected actual
+'
+
+test_expect_success '"add" from relative HEAD' '
+	test_commit a &&
+	test_commit b &&
+	test_commit c &&
+	git rev-parse HEAD~1 >expected &&
+	git worktree add relhead HEAD~1 &&
+	git -C relhead rev-parse HEAD >actual &&
+	test_cmp expected actual
+'
+
+test_expect_success '"add -b" with <branch> omitted' '
+	git worktree add -b burble flornk &&
+	test_cmp_rev HEAD burble
+'
+
+test_expect_success '"add --detach" with <branch> omitted' '
+	git worktree add --detach fishhook &&
+	git rev-parse HEAD >expected &&
+	git -C fishhook rev-parse HEAD >actual &&
+	test_cmp expected actual &&
+	test_must_fail git -C fishhook symbolic-ref HEAD
+'
+
+test_expect_success '"add" with <branch> omitted' '
+	git worktree add wiffle/bat &&
+	test_cmp_rev HEAD bat
+'
+
+test_expect_success '"add" checks out existing branch of dwimd name' '
+	git branch dwim HEAD~1 &&
+	git worktree add dwim &&
+	test_cmp_rev HEAD~1 dwim &&
+	(
+		cd dwim &&
+		test_cmp_rev HEAD dwim
+	)
+'
+
+test_expect_success '"add <path>" dwim fails with checked out branch' '
+	git checkout -b test-branch &&
+	test_must_fail git worktree add test-branch &&
+	test_path_is_missing test-branch
+'
+
+test_expect_success '"add --force" with existing dwimd name doesnt die' '
+	git checkout test-branch &&
+	git worktree add --force test-branch
+'
+
+test_expect_success '"add" no auto-vivify with --detach and <branch> omitted' '
+	git worktree add --detach mish/mash &&
+	test_must_fail git rev-parse mash -- &&
+	test_must_fail git -C mish/mash symbolic-ref HEAD
+'
+
+test_expect_success '"add" -b/-B mutually exclusive' '
+	test_must_fail git worktree add -b poodle -B poodle bamboo master
+'
+
+test_expect_success '"add" -b/--detach mutually exclusive' '
+	test_must_fail git worktree add -b poodle --detach bamboo master
+'
+
+test_expect_success '"add" -B/--detach mutually exclusive' '
+	test_must_fail git worktree add -B poodle --detach bamboo master
+'
+
+test_expect_success '"add -B" fails if the branch is checked out' '
+	git rev-parse newmaster >before &&
+	test_must_fail git worktree add -B newmaster bamboo master &&
+	git rev-parse newmaster >after &&
+	test_cmp before after
+'
+
+test_expect_success 'add -B' '
+	git worktree add -B poodle bamboo2 master^ &&
+	git -C bamboo2 symbolic-ref HEAD >actual &&
+	echo refs/heads/poodle >expected &&
+	test_cmp expected actual &&
+	test_cmp_rev master^ poodle
+'
+
+test_expect_success 'add --quiet' '
+	git worktree add --quiet another-worktree master 2>actual &&
+	test_must_be_empty actual
+'
+
+test_expect_success 'local clone from linked checkout' '
+	git clone --local here here-clone &&
+	( cd here-clone && git fsck )
+'
+
+test_expect_success 'local clone --shared from linked checkout' '
+	git -C bare worktree add --detach ../baretree &&
+	git clone --local --shared baretree bare-clone &&
+	grep /bare/ bare-clone/.git/objects/info/alternates
+'
+
+test_expect_success '"add" worktree with --no-checkout' '
+	git worktree add --no-checkout -b swamp swamp &&
+	! test -e swamp/init.t &&
+	git -C swamp reset --hard &&
+	test_cmp init.t swamp/init.t
+'
+
+test_expect_success '"add" worktree with --checkout' '
+	git worktree add --checkout -b swmap2 swamp2 &&
+	test_cmp init.t swamp2/init.t
+'
+
+test_expect_success 'put a worktree under rebase' '
+	git worktree add under-rebase &&
+	(
+		cd under-rebase &&
+		set_fake_editor &&
+		FAKE_LINES="edit 1" git rebase -i HEAD^ &&
+		git worktree list | grep "under-rebase.*detached HEAD"
+	)
+'
+
+test_expect_success 'add a worktree, checking out a rebased branch' '
+	test_must_fail git worktree add new-rebase under-rebase &&
+	! test -d new-rebase
+'
+
+test_expect_success 'checking out a rebased branch from another worktree' '
+	git worktree add new-place &&
+	test_must_fail git -C new-place checkout under-rebase
+'
+
+test_expect_success 'not allow to delete a branch under rebase' '
+	(
+		cd under-rebase &&
+		test_must_fail git branch -D under-rebase
+	)
+'
+
+test_expect_success 'rename a branch under rebase not allowed' '
+	test_must_fail git branch -M under-rebase rebase-with-new-name
+'
+
+test_expect_success 'check out from current worktree branch ok' '
+	(
+		cd under-rebase &&
+		git checkout under-rebase &&
+		git checkout - &&
+		git rebase --abort
+	)
+'
+
+test_expect_success 'checkout a branch under bisect' '
+	git worktree add under-bisect &&
+	(
+		cd under-bisect &&
+		git bisect start &&
+		git bisect bad &&
+		git bisect good HEAD~2 &&
+		git worktree list | grep "under-bisect.*detached HEAD" &&
+		test_must_fail git worktree add new-bisect under-bisect &&
+		! test -d new-bisect
+	)
+'
+
+test_expect_success 'rename a branch under bisect not allowed' '
+	test_must_fail git branch -M under-bisect bisect-with-new-name
+'
+# Is branch "refs/heads/$1" set to pull from "$2/$3"?
+test_branch_upstream () {
+	printf "%s\n" "$2" "refs/heads/$3" >expect.upstream &&
+	{
+		git config "branch.$1.remote" &&
+		git config "branch.$1.merge"
+	} >actual.upstream &&
+	test_cmp expect.upstream actual.upstream
+}
+
+test_expect_success '--track sets up tracking' '
+	test_when_finished rm -rf track &&
+	git worktree add --track -b track track master &&
+	test_branch_upstream track . master
+'
+
+# setup remote repository $1 and repository $2 with $1 set up as
+# remote.  The remote has two branches, master and foo.
+setup_remote_repo () {
+	git init $1 &&
+	(
+		cd $1 &&
+		test_commit $1_master &&
+		git checkout -b foo &&
+		test_commit upstream_foo
+	) &&
+	git init $2 &&
+	(
+		cd $2 &&
+		test_commit $2_master &&
+		git remote add $1 ../$1 &&
+		git config remote.$1.fetch \
+			"refs/heads/*:refs/remotes/$1/*" &&
+		git fetch --all
+	)
+}
+
+test_expect_success '--no-track avoids setting up tracking' '
+	test_when_finished rm -rf repo_upstream repo_local foo &&
+	setup_remote_repo repo_upstream repo_local &&
+	(
+		cd repo_local &&
+		git worktree add --no-track -b foo ../foo repo_upstream/foo
+	) &&
+	(
+		cd foo &&
+		test_must_fail git config "branch.foo.remote" &&
+		test_must_fail git config "branch.foo.merge" &&
+		test_cmp_rev refs/remotes/repo_upstream/foo refs/heads/foo
+	)
+'
+
+test_expect_success '"add" <path> <non-existent-branch> fails' '
+	test_must_fail git worktree add foo non-existent
+'
+
+test_expect_success '"add" <path> <branch> dwims' '
+	test_when_finished rm -rf repo_upstream repo_dwim foo &&
+	setup_remote_repo repo_upstream repo_dwim &&
+	git init repo_dwim &&
+	(
+		cd repo_dwim &&
+		git worktree add ../foo foo
+	) &&
+	(
+		cd foo &&
+		test_branch_upstream foo repo_upstream foo &&
+		test_cmp_rev refs/remotes/repo_upstream/foo refs/heads/foo
+	)
+'
+
+test_expect_success '"add" <path> <branch> dwims with checkout.defaultRemote' '
+	test_when_finished rm -rf repo_upstream repo_dwim foo &&
+	setup_remote_repo repo_upstream repo_dwim &&
+	git init repo_dwim &&
+	(
+		cd repo_dwim &&
+		git remote add repo_upstream2 ../repo_upstream &&
+		git fetch repo_upstream2 &&
+		test_must_fail git worktree add ../foo foo &&
+		git -c checkout.defaultRemote=repo_upstream worktree add ../foo foo &&
+		git status -uno --porcelain >status.actual &&
+		test_must_be_empty status.actual
+	) &&
+	(
+		cd foo &&
+		test_branch_upstream foo repo_upstream foo &&
+		test_cmp_rev refs/remotes/repo_upstream/foo refs/heads/foo
+	)
+'
+
+test_expect_success 'git worktree add does not match remote' '
+	test_when_finished rm -rf repo_a repo_b foo &&
+	setup_remote_repo repo_a repo_b &&
+	(
+		cd repo_b &&
+		git worktree add ../foo
+	) &&
+	(
+		cd foo &&
+		test_must_fail git config "branch.foo.remote" &&
+		test_must_fail git config "branch.foo.merge" &&
+		test_cmp_rev ! refs/remotes/repo_a/foo refs/heads/foo
+	)
+'
+
+test_expect_success 'git worktree add --guess-remote sets up tracking' '
+	test_when_finished rm -rf repo_a repo_b foo &&
+	setup_remote_repo repo_a repo_b &&
+	(
+		cd repo_b &&
+		git worktree add --guess-remote ../foo
+	) &&
+	(
+		cd foo &&
+		test_branch_upstream foo repo_a foo &&
+		test_cmp_rev refs/remotes/repo_a/foo refs/heads/foo
+	)
+'
+
+test_expect_success 'git worktree add with worktree.guessRemote sets up tracking' '
+	test_when_finished rm -rf repo_a repo_b foo &&
+	setup_remote_repo repo_a repo_b &&
+	(
+		cd repo_b &&
+		git config worktree.guessRemote true &&
+		git worktree add ../foo
+	) &&
+	(
+		cd foo &&
+		test_branch_upstream foo repo_a foo &&
+		test_cmp_rev refs/remotes/repo_a/foo refs/heads/foo
+	)
+'
+
+test_expect_success 'git worktree --no-guess-remote option overrides config' '
+	test_when_finished rm -rf repo_a repo_b foo &&
+	setup_remote_repo repo_a repo_b &&
+	(
+		cd repo_b &&
+		git config worktree.guessRemote true &&
+		git worktree add --no-guess-remote ../foo
+	) &&
+	(
+		cd foo &&
+		test_must_fail git config "branch.foo.remote" &&
+		test_must_fail git config "branch.foo.merge" &&
+		test_cmp_rev ! refs/remotes/repo_a/foo refs/heads/foo
+	)
+'
+
+post_checkout_hook () {
+	gitdir=${1:-.git}
+	test_when_finished "rm -f $gitdir/hooks/post-checkout" &&
+	mkdir -p $gitdir/hooks &&
+	write_script $gitdir/hooks/post-checkout <<-\EOF
+	{
+		echo $*
+		git rev-parse --git-dir --show-toplevel
+	} >hook.actual
+	EOF
+}
+
+test_expect_success '"add" invokes post-checkout hook (branch)' '
+	post_checkout_hook &&
+	{
+		echo $ZERO_OID $(git rev-parse HEAD) 1 &&
+		echo $(pwd)/.git/worktrees/gumby &&
+		echo $(pwd)/gumby
+	} >hook.expect &&
+	git worktree add gumby &&
+	test_cmp hook.expect gumby/hook.actual
+'
+
+test_expect_success '"add" invokes post-checkout hook (detached)' '
+	post_checkout_hook &&
+	{
+		echo $ZERO_OID $(git rev-parse HEAD) 1 &&
+		echo $(pwd)/.git/worktrees/grumpy &&
+		echo $(pwd)/grumpy
+	} >hook.expect &&
+	git worktree add --detach grumpy &&
+	test_cmp hook.expect grumpy/hook.actual
+'
+
+test_expect_success '"add --no-checkout" suppresses post-checkout hook' '
+	post_checkout_hook &&
+	rm -f hook.actual &&
+	git worktree add --no-checkout gloopy &&
+	test_path_is_missing gloopy/hook.actual
+'
+
+test_expect_success '"add" in other worktree invokes post-checkout hook' '
+	post_checkout_hook &&
+	{
+		echo $ZERO_OID $(git rev-parse HEAD) 1 &&
+		echo $(pwd)/.git/worktrees/guppy &&
+		echo $(pwd)/guppy
+	} >hook.expect &&
+	git -C gloopy worktree add --detach ../guppy &&
+	test_cmp hook.expect guppy/hook.actual
+'
+
+test_expect_success '"add" in bare repo invokes post-checkout hook' '
+	rm -rf bare &&
+	git clone --bare . bare &&
+	{
+		echo $ZERO_OID $(git --git-dir=bare rev-parse HEAD) 1 &&
+		echo $(pwd)/bare/worktrees/goozy &&
+		echo $(pwd)/goozy
+	} >hook.expect &&
+	post_checkout_hook bare &&
+	git -C bare worktree add --detach ../goozy &&
+	test_cmp hook.expect goozy/hook.actual
+'
+
+test_expect_success '"add" an existing but missing worktree' '
+	git worktree add --detach pneu &&
+	test_must_fail git worktree add --detach pneu &&
+	rm -fr pneu &&
+	test_must_fail git worktree add --detach pneu &&
+	git worktree add --force --detach pneu
+'
+
+test_expect_success '"add" an existing locked but missing worktree' '
+	git worktree add --detach gnoo &&
+	git worktree lock gnoo &&
+	test_when_finished "git worktree unlock gnoo || :" &&
+	rm -fr gnoo &&
+	test_must_fail git worktree add --detach gnoo &&
+	test_must_fail git worktree add --force --detach gnoo &&
+	git worktree add --force --force --detach gnoo
+'
+
+test_expect_success '"add" not tripped up by magic worktree matching"' '
+	# if worktree "sub1/bar" exists, "git worktree add bar" in distinct
+	# directory `sub2` should not mistakenly complain that `bar` is an
+	# already-registered worktree
+	mkdir sub1 sub2 &&
+	git -C sub1 --git-dir=../.git worktree add --detach bozo &&
+	git -C sub2 --git-dir=../.git worktree add --detach bozo
+'
+
+test_expect_success FUNNYNAMES 'sanitize generated worktree name' '
+	git worktree add --detach ".  weird*..?.lock.lock" &&
+	test -d .git/worktrees/---weird-.-
+'
+
+test_expect_success '"add" should not fail because of another bad worktree' '
+	git init add-fail &&
+	(
+		cd add-fail &&
+		test_commit first &&
+		mkdir sub &&
+		git worktree add sub/to-be-deleted &&
+		rm -rf sub &&
+		git worktree add second
+	)
+'
+
+test_expect_success '"add" with uninitialized submodule, with submodule.recurse unset' '
+	test_create_repo submodule &&
+	test_commit -C submodule first &&
+	test_create_repo project &&
+	git -C project submodule add ../submodule &&
+	git -C project add submodule &&
+	test_tick &&
+	git -C project commit -m add_sub &&
+	git clone project project-clone &&
+	git -C project-clone worktree add ../project-2
+'
+test_expect_success '"add" with uninitialized submodule, with submodule.recurse set' '
+	git -C project-clone -c submodule.recurse worktree add ../project-3
+'
+
+test_expect_success '"add" with initialized submodule, with submodule.recurse unset' '
+	git -C project-clone submodule update --init &&
+	git -C project-clone worktree add ../project-4
+'
+
+test_expect_success '"add" with initialized submodule, with submodule.recurse set' '
+	git -C project-clone -c submodule.recurse worktree add ../project-5
+'
+
+test_done