#!/bin/sh

test_description="Tests of cwd/prefix/worktree/gitdir setup in all cases

A few rules for repo setup:

1. GIT_DIR is relative to user's cwd. --git-dir is equivalent to
   GIT_DIR.

2. .git file is relative to parent directory. .git file is basically
   symlink in disguise. The directory where .git file points to will
   become new git_dir.

3. core.worktree is relative to git_dir.

4. GIT_WORK_TREE is relative to user's cwd. --work-tree is
   equivalent to GIT_WORK_TREE.

5. GIT_WORK_TREE/core.worktree is only effective if GIT_DIR is set
   Uneffective worktree settings should be warned.

6. Effective GIT_WORK_TREE overrides core.worktree and core.bare

7. Effective core.worktree conflicts with core.bare

8. If GIT_DIR is set but neither worktree nor bare setting is given,
   original cwd becomes worktree.

9. If .git discovery is done inside a repo, the repo becomes a bare
   repo. .git discovery is performed if GIT_DIR is not set.

10. If no worktree is available, cwd remains unchanged, prefix is
    NULL.

11. When user's cwd is outside worktree, cwd remains unchanged,
    prefix is NULL.
"
. ./test-lib.sh

here=$(pwd)

test_repo () {
	(
		cd "$1" &&
		if test -n "$2"
		then
			GIT_DIR="$2" &&
			export GIT_DIR
		fi &&
		if test -n "$3"
		then
			GIT_WORK_TREE="$3" &&
			export GIT_WORK_TREE
		fi &&
		rm -f trace &&
		GIT_TRACE="$(pwd)/trace" git symbolic-ref HEAD >/dev/null &&
		grep '^setup: ' trace >result &&
		test_cmp expected result
	)
}

maybe_config () {
	file=$1 var=$2 value=$3 &&
	if test "$value" != unset
	then
		git config --file="$file" "$var" "$value"
	fi
}

setup_repo () {
	name=$1 worktreecfg=$2 gitfile=$3 barecfg=$4 &&
	sane_unset GIT_DIR GIT_WORK_TREE &&

	git init "$name" &&
	maybe_config "$name/.git/config" core.worktree "$worktreecfg" &&
	maybe_config "$name/.git/config" core.bare "$barecfg" &&
	mkdir -p "$name/sub/sub" &&

	if test "${gitfile:+set}"
	then
		mv "$name/.git" "$name.git" &&
		echo "gitdir: ../$name.git" >"$name/.git"
	fi
}

maybe_set () {
	var=$1 value=$2 &&
	if test "$value" != unset
	then
		eval "$var=\$value" &&
		export $var
	fi
}

setup_env () {
	worktreenv=$1 gitdirenv=$2 &&
	sane_unset GIT_DIR GIT_WORK_TREE &&
	maybe_set GIT_DIR "$gitdirenv" &&
	maybe_set GIT_WORK_TREE "$worktreeenv"
}

expect () {
	cat >"$1/expected" <<-EOF
	setup: git_dir: $2
	setup: worktree: $3
	setup: cwd: $4
	setup: prefix: $5
	EOF
}

try_case () {
	name=$1 worktreeenv=$2 gitdirenv=$3 &&
	setup_env "$worktreeenv" "$gitdirenv" &&
	expect "$name" "$4" "$5" "$6" "$7" &&
	test_repo "$name"
}

run_wt_tests () {
	N=$1 gitfile=$2

	absgit="$here/$N/.git"
	dotgit=.git
	dotdotgit=../../.git

	if test "$gitfile"
	then
		absgit="$here/$N.git"
		dotgit=$absgit dotdotgit=$absgit
	fi

	test_expect_success "#$N: explicit GIT_WORK_TREE and GIT_DIR at toplevel" '
		try_case $N "$here/$N" .git \
			"$dotgit" "$here/$N" "$here/$N" "(null)" &&
		try_case $N . .git \
			"$dotgit" "$here/$N" "$here/$N" "(null)" &&
		try_case $N "$here/$N" "$here/$N/.git" \
			"$absgit" "$here/$N" "$here/$N" "(null)" &&
		try_case $N . "$here/$N/.git" \
			"$absgit" "$here/$N" "$here/$N" "(null)"
	'

	test_expect_success "#$N: explicit GIT_WORK_TREE and GIT_DIR in subdir" '
		try_case $N/sub/sub "$here/$N" ../../.git \
			"$absgit" "$here/$N" "$here/$N" sub/sub/ &&
		try_case $N/sub/sub ../.. ../../.git \
			"$absgit" "$here/$N" "$here/$N" sub/sub/ &&
		try_case $N/sub/sub "$here/$N" "$here/$N/.git" \
			"$absgit" "$here/$N" "$here/$N" sub/sub/ &&
		try_case $N/sub/sub ../.. "$here/$N/.git" \
			"$absgit" "$here/$N" "$here/$N" sub/sub/
	'

	test_expect_success "#$N: explicit GIT_WORK_TREE from parent of worktree" '
		try_case $N "$here/$N/wt" .git \
			"$dotgit" "$here/$N/wt" "$here/$N" "(null)" &&
		try_case $N wt .git \
			"$dotgit" "$here/$N/wt" "$here/$N" "(null)" &&
		try_case $N wt "$here/$N/.git" \
			"$absgit" "$here/$N/wt" "$here/$N" "(null)" &&
		try_case $N "$here/$N/wt" "$here/$N/.git" \
			"$absgit" "$here/$N/wt" "$here/$N" "(null)"
	'

	test_expect_success "#$N: explicit GIT_WORK_TREE from nephew of worktree" '
		try_case $N/sub/sub "$here/$N/wt" ../../.git \
			"$dotdotgit" "$here/$N/wt" "$here/$N/sub/sub" "(null)" &&
		try_case $N/sub/sub ../../wt ../../.git \
			"$dotdotgit" "$here/$N/wt" "$here/$N/sub/sub" "(null)" &&
		try_case $N/sub/sub ../../wt "$here/$N/.git" \
			"$absgit" "$here/$N/wt" "$here/$N/sub/sub" "(null)" &&
		try_case $N/sub/sub "$here/$N/wt" "$here/$N/.git" \
			"$absgit" "$here/$N/wt" "$here/$N/sub/sub" "(null)"
	'

	test_expect_success "#$N: chdir_to_toplevel uses worktree, not git dir" '
		try_case $N "$here" .git \
			"$absgit" "$here" "$here" $N/ &&
		try_case $N .. .git \
			"$absgit" "$here" "$here" $N/ &&
		try_case $N .. "$here/$N/.git" \
			"$absgit" "$here" "$here" $N/ &&
		try_case $N "$here" "$here/$N/.git" \
			"$absgit" "$here" "$here" $N/
	'

	test_expect_success "#$N: chdir_to_toplevel uses worktree (from subdir)" '
		try_case $N/sub/sub "$here" ../../.git \
			"$absgit" "$here" "$here" $N/sub/sub/ &&
		try_case $N/sub/sub ../../.. ../../.git \
			"$absgit" "$here" "$here" $N/sub/sub/ &&
		try_case $N/sub/sub ../../../ "$here/$N/.git" \
			"$absgit" "$here" "$here" $N/sub/sub/ &&
		try_case $N/sub/sub "$here" "$here/$N/.git" \
			"$absgit" "$here" "$here" $N/sub/sub/
	'
}

# try_repo #c GIT_WORK_TREE GIT_DIR core.worktree .gitfile? core.bare \
#	(git dir) (work tree) (cwd) (prefix) \	<-- at toplevel
#	(git dir) (work tree) (cwd) (prefix)	<-- from subdir
try_repo () {
	name=$1 worktreeenv=$2 gitdirenv=$3 &&
	setup_repo "$name" "$4" "$5" "$6" &&
	shift 6 &&
	try_case "$name" "$worktreeenv" "$gitdirenv" \
		"$1" "$2" "$3" "$4" &&
	shift 4 &&
	case "$gitdirenv" in
	/* | ?:/* | unset) ;;
	*)
		gitdirenv=../$gitdirenv ;;
	esac &&
	try_case "$name/sub" "$worktreeenv" "$gitdirenv" \
		"$1" "$2" "$3" "$4"
}

# Bit 0 = GIT_WORK_TREE
# Bit 1 = GIT_DIR
# Bit 2 = core.worktree
# Bit 3 = .git is a file
# Bit 4 = bare repo
# Case# = encoding of the above 5 bits

test_expect_success '#0: nonbare repo, no explicit configuration' '
	try_repo 0 unset unset unset "" unset \
		.git "$here/0" "$here/0" "(null)" \
		.git "$here/0" "$here/0" sub/
'

test_expect_success '#1: GIT_WORK_TREE without explicit GIT_DIR is ignored' '
	try_repo 1 non-existent unset unset "" unset \
		.git "$here/1" "$here/1" "(null)" \
		.git "$here/1" "$here/1" sub/
'

test_expect_success '#2: worktree defaults to cwd with explicit GIT_DIR' '
	try_repo 2 unset "$here/2/.git" unset "" unset \
		"$here/2/.git" "$here/2" "$here/2" "(null)" \
		"$here/2/.git" "$here/2/sub" "$here/2/sub" "(null)"
'

test_expect_success '#2b: relative GIT_DIR' '
	try_repo 2b unset ".git" unset "" unset \
		".git" "$here/2b" "$here/2b" "(null)" \
		"../.git" "$here/2b/sub" "$here/2b/sub" "(null)"
'

test_expect_success '#3: setup' '
	setup_repo 3 unset "" unset &&
	mkdir -p 3/sub/sub 3/wt/sub
'
run_wt_tests 3

test_expect_success '#4: core.worktree without GIT_DIR set is ignored' '
	try_repo 4 unset unset non-existent "" unset \
		.git "$here/4" "$here/4" "(null)" \
		.git "$here/4" "$here/4" sub/
'

test_expect_success '#5: core.worktree + GIT_WORK_TREE is still ignored' '
	# or: you cannot intimidate away the lack of GIT_DIR setting
	try_repo 5 non-existent-too unset non-existent "" unset \
		.git "$here/5" "$here/5" "(null)" \
		.git "$here/5" "$here/5" sub/
'

test_expect_success '#6: setting GIT_DIR brings core.worktree to life' '
	setup_repo 6 "$here/6" "" unset &&
	try_case 6 unset .git \
		.git "$here/6" "$here/6" "(null)" &&
	try_case 6 unset "$here/6/.git" \
		"$here/6/.git" "$here/6" "$here/6" "(null)" &&
	try_case 6/sub/sub unset ../../.git \
		"$here/6/.git" "$here/6" "$here/6" sub/sub/ &&
	try_case 6/sub/sub unset "$here/6/.git" \
		"$here/6/.git" "$here/6" "$here/6" sub/sub/
'

test_expect_success '#6b: GIT_DIR set, core.worktree relative' '
	setup_repo 6b .. "" unset &&
	try_case 6b unset .git \
		.git "$here/6b" "$here/6b" "(null)" &&
	try_case 6b unset "$here/6b/.git" \
		"$here/6b/.git" "$here/6b" "$here/6b" "(null)" &&
	try_case 6b/sub/sub unset ../../.git \
		"$here/6b/.git" "$here/6b" "$here/6b" sub/sub/ &&
	try_case 6b/sub/sub unset "$here/6b/.git" \
		"$here/6b/.git" "$here/6b" "$here/6b" sub/sub/
'

test_expect_success '#6c: GIT_DIR set, core.worktree=../wt (absolute)' '
	setup_repo 6c "$here/6c/wt" "" unset &&
	mkdir -p 6c/wt/sub &&

	try_case 6c unset .git \
		.git "$here/6c/wt" "$here/6c" "(null)" &&
	try_case 6c unset "$here/6c/.git" \
		"$here/6c/.git" "$here/6c/wt" "$here/6c" "(null)" &&
	try_case 6c/sub/sub unset ../../.git \
		../../.git "$here/6c/wt" "$here/6c/sub/sub" "(null)" &&
	try_case 6c/sub/sub unset "$here/6c/.git" \
		"$here/6c/.git" "$here/6c/wt" "$here/6c/sub/sub" "(null)"
'

test_expect_success '#6d: GIT_DIR set, core.worktree=../wt (relative)' '
	setup_repo 6d "$here/6d/wt" "" unset &&
	mkdir -p 6d/wt/sub &&

	try_case 6d unset .git \
		.git "$here/6d/wt" "$here/6d" "(null)" &&
	try_case 6d unset "$here/6d/.git" \
		"$here/6d/.git" "$here/6d/wt" "$here/6d" "(null)" &&
	try_case 6d/sub/sub unset ../../.git \
		../../.git "$here/6d/wt" "$here/6d/sub/sub" "(null)" &&
	try_case 6d/sub/sub unset "$here/6d/.git" \
		"$here/6d/.git" "$here/6d/wt" "$here/6d/sub/sub" "(null)"
'

test_expect_success '#6e: GIT_DIR set, core.worktree=../.. (absolute)' '
	setup_repo 6e "$here" "" unset &&
	try_case 6e unset .git \
		"$here/6e/.git" "$here" "$here" 6e/ &&
	try_case 6e unset "$here/6e/.git" \
		"$here/6e/.git" "$here" "$here" 6e/ &&
	try_case 6e/sub/sub unset ../../.git \
		"$here/6e/.git" "$here" "$here" 6e/sub/sub/ &&
	try_case 6e/sub/sub unset "$here/6e/.git" \
		"$here/6e/.git" "$here" "$here" 6e/sub/sub/
'

test_expect_success '#6f: GIT_DIR set, core.worktree=../.. (relative)' '
	setup_repo 6f ../../ "" unset &&
	try_case 6f unset .git \
		"$here/6f/.git" "$here" "$here" 6f/ &&
	try_case 6f unset "$here/6f/.git" \
		"$here/6f/.git" "$here" "$here" 6f/ &&
	try_case 6f/sub/sub unset ../../.git \
		"$here/6f/.git" "$here" "$here" 6f/sub/sub/ &&
	try_case 6f/sub/sub unset "$here/6f/.git" \
		"$here/6f/.git" "$here" "$here" 6f/sub/sub/
'

# case #7: GIT_WORK_TREE overrides core.worktree.
test_expect_success '#7: setup' '
	setup_repo 7 non-existent "" unset &&
	mkdir -p 7/sub/sub 7/wt/sub
'
run_wt_tests 7

test_expect_success '#8: gitfile, easy case' '
	try_repo 8 unset unset unset gitfile unset \
		"$here/8.git" "$here/8" "$here/8" "(null)" \
		"$here/8.git" "$here/8" "$here/8" sub/
'

test_expect_success '#9: GIT_WORK_TREE ignored even with gitfile' '
	try_repo 9 non-existent unset unset gitfile unset \
		"$here/9.git" "$here/9" "$here/9" "(null)" \
		"$here/9.git" "$here/9" "$here/9" sub/
'

test_expect_success '#10: GIT_DIR can point to gitfile' '
	try_repo 10 unset "$here/10/.git" unset gitfile unset \
		"$here/10.git" "$here/10" "$here/10" "(null)" \
		"$here/10.git" "$here/10/sub" "$here/10/sub" "(null)"
'

test_expect_success '#10b: relative GIT_DIR can point to gitfile' '
	try_repo 10b unset .git unset gitfile unset \
		"$here/10b.git" "$here/10b" "$here/10b" "(null)" \
		"$here/10b.git" "$here/10b/sub" "$here/10b/sub" "(null)"
'

# case #11: GIT_WORK_TREE works, gitfile case.
test_expect_success '#11: setup' '
	setup_repo 11 unset gitfile unset &&
	mkdir -p 11/sub/sub 11/wt/sub
'
run_wt_tests 11 gitfile

test_expect_success '#12: core.worktree with gitfile is still ignored' '
	try_repo 12 unset unset non-existent gitfile unset \
		"$here/12.git" "$here/12" "$here/12" "(null)" \
		"$here/12.git" "$here/12" "$here/12" sub/
'

test_expect_success '#13: core.worktree+GIT_WORK_TREE ignored (with gitfile)' '
	# or: you cannot intimidate away the lack of GIT_DIR setting
	try_repo 13 non-existent-too unset non-existent gitfile unset \
		"$here/13.git" "$here/13" "$here/13" "(null)" \
		"$here/13.git" "$here/13" "$here/13" sub/
'

# case #14.
# If this were more table-driven, it could share code with case #6.

test_expect_success '#14: core.worktree with GIT_DIR pointing to gitfile' '
	setup_repo 14 "$here/14" gitfile unset &&
	try_case 14 unset .git \
		"$here/14.git" "$here/14" "$here/14" "(null)" &&
	try_case 14 unset "$here/14/.git" \
		"$here/14.git" "$here/14" "$here/14" "(null)" &&
	try_case 14/sub/sub unset ../../.git \
		"$here/14.git" "$here/14" "$here/14" sub/sub/ &&
	try_case 14/sub/sub unset "$here/14/.git" \
		"$here/14.git" "$here/14" "$here/14" sub/sub/ &&

	setup_repo 14c "$here/14c/wt" gitfile unset &&
	mkdir -p 14c/wt/sub &&

	try_case 14c unset .git \
		"$here/14c.git" "$here/14c/wt" "$here/14c" "(null)" &&
	try_case 14c unset "$here/14c/.git" \
		"$here/14c.git" "$here/14c/wt" "$here/14c" "(null)" &&
	try_case 14c/sub/sub unset ../../.git \
		"$here/14c.git" "$here/14c/wt" "$here/14c/sub/sub" "(null)" &&
	try_case 14c/sub/sub unset "$here/14c/.git" \
		"$here/14c.git" "$here/14c/wt" "$here/14c/sub/sub" "(null)" &&

	setup_repo 14d "$here/14d/wt" gitfile unset &&
	mkdir -p 14d/wt/sub &&

	try_case 14d unset .git \
		"$here/14d.git" "$here/14d/wt" "$here/14d" "(null)" &&
	try_case 14d unset "$here/14d/.git" \
		"$here/14d.git" "$here/14d/wt" "$here/14d" "(null)" &&
	try_case 14d/sub/sub unset ../../.git \
		"$here/14d.git" "$here/14d/wt" "$here/14d/sub/sub" "(null)" &&
	try_case 14d/sub/sub unset "$here/14d/.git" \
		"$here/14d.git" "$here/14d/wt" "$here/14d/sub/sub" "(null)" &&

	setup_repo 14e "$here" gitfile unset &&
	try_case 14e unset .git \
		"$here/14e.git" "$here" "$here" 14e/ &&
	try_case 14e unset "$here/14e/.git" \
		"$here/14e.git" "$here" "$here" 14e/ &&
	try_case 14e/sub/sub unset ../../.git \
		"$here/14e.git" "$here" "$here" 14e/sub/sub/ &&
	try_case 14e/sub/sub unset "$here/14e/.git" \
		"$here/14e.git" "$here" "$here" 14e/sub/sub/
'

test_expect_success '#14b: core.worktree is relative to actual git dir' '
	setup_repo 14b ../14b gitfile unset &&
	try_case 14b unset .git \
		"$here/14b.git" "$here/14b" "$here/14b" "(null)" &&
	try_case 14b unset "$here/14b/.git" \
		"$here/14b.git" "$here/14b" "$here/14b" "(null)" &&
	try_case 14b/sub/sub unset ../../.git \
		"$here/14b.git" "$here/14b" "$here/14b" sub/sub/ &&
	try_case 14b/sub/sub unset "$here/14b/.git" \
		"$here/14b.git" "$here/14b" "$here/14b" sub/sub/ &&

	setup_repo 14f ../ gitfile unset &&
	try_case 14f unset .git \
		"$here/14f.git" "$here" "$here" 14f/ &&
	try_case 14f unset "$here/14f/.git" \
		"$here/14f.git" "$here" "$here" 14f/ &&
	try_case 14f/sub/sub unset ../../.git \
		"$here/14f.git" "$here" "$here" 14f/sub/sub/ &&
	try_case 14f/sub/sub unset "$here/14f/.git" \
		"$here/14f.git" "$here" "$here" 14f/sub/sub/
'

# case #15: GIT_WORK_TREE overrides core.worktree (gitfile case).
test_expect_success '#15: setup' '
	setup_repo 15 non-existent gitfile unset &&
	mkdir -p 15/sub/sub 15/wt/sub
'
run_wt_tests 15 gitfile

test_expect_success '#16a: implicitly bare repo (cwd inside .git dir)' '
	setup_repo 16a unset "" unset &&
	mkdir -p 16a/.git/wt/sub &&

	try_case 16a/.git unset unset \
		. "(null)" "$here/16a/.git" "(null)" &&
	try_case 16a/.git/wt unset unset \
		"$here/16a/.git" "(null)" "$here/16a/.git/wt" "(null)" &&
	try_case 16a/.git/wt/sub unset unset \
		"$here/16a/.git" "(null)" "$here/16a/.git/wt/sub" "(null)"
'

test_expect_success '#16b: bare .git (cwd inside .git dir)' '
	setup_repo 16b unset "" true &&
	mkdir -p 16b/.git/wt/sub &&

	try_case 16b/.git unset unset \
		. "(null)" "$here/16b/.git" "(null)" &&
	try_case 16b/.git/wt unset unset \
		"$here/16b/.git" "(null)" "$here/16b/.git/wt" "(null)" &&
	try_case 16b/.git/wt/sub unset unset \
		"$here/16b/.git" "(null)" "$here/16b/.git/wt/sub" "(null)"
'

test_expect_success '#16c: bare .git has no worktree' '
	try_repo 16c unset unset unset "" true \
		.git "(null)" "$here/16c" "(null)" \
		"$here/16c/.git" "(null)" "$here/16c/sub" "(null)"
'

test_expect_success '#17: GIT_WORK_TREE without explicit GIT_DIR is ignored (bare case)' '
	# Just like #16.
	setup_repo 17a unset "" true &&
	setup_repo 17b unset "" true &&
	mkdir -p 17a/.git/wt/sub &&
	mkdir -p 17b/.git/wt/sub &&

	try_case 17a/.git non-existent unset \
		. "(null)" "$here/17a/.git" "(null)" &&
	try_case 17a/.git/wt non-existent unset \
		"$here/17a/.git" "(null)" "$here/17a/.git/wt" "(null)" &&
	try_case 17a/.git/wt/sub non-existent unset \
		"$here/17a/.git" "(null)" "$here/17a/.git/wt/sub" "(null)" &&

	try_case 17b/.git non-existent unset \
		. "(null)" "$here/17b/.git" "(null)" &&
	try_case 17b/.git/wt non-existent unset \
		"$here/17b/.git" "(null)" "$here/17b/.git/wt" "(null)" &&
	try_case 17b/.git/wt/sub non-existent unset \
		"$here/17b/.git" "(null)" "$here/17b/.git/wt/sub" "(null)" &&

	try_repo 17c non-existent unset unset "" true \
		.git "(null)" "$here/17c" "(null)" \
		"$here/17c/.git" "(null)" "$here/17c/sub" "(null)"
'

test_expect_success '#18: bare .git named by GIT_DIR has no worktree' '
	try_repo 18 unset .git unset "" true \
		.git "(null)" "$here/18" "(null)" \
		../.git "(null)" "$here/18/sub" "(null)" &&
	try_repo 18b unset "$here/18b/.git" unset "" true \
		"$here/18b/.git" "(null)" "$here/18b" "(null)" \
		"$here/18b/.git" "(null)" "$here/18b/sub" "(null)"
'

# Case #19: GIT_DIR + GIT_WORK_TREE suppresses bareness.
test_expect_success '#19: setup' '
	setup_repo 19 unset "" true &&
	mkdir -p 19/sub/sub 19/wt/sub
'
run_wt_tests 19

test_expect_success '#20a: core.worktree without GIT_DIR ignored (inside .git)' '
	# Just like case #16a.
	setup_repo 20a non-existent "" unset &&
	mkdir -p 20a/.git/wt/sub &&
	try_case 20a/.git unset unset \
		. "(null)" "$here/20a/.git" "(null)" &&
	try_case 20a/.git/wt unset unset \
		"$here/20a/.git" "(null)" "$here/20a/.git/wt" "(null)" &&
	try_case 20a/.git/wt/sub unset unset \
		"$here/20a/.git" "(null)" "$here/20a/.git/wt/sub" "(null)"
'

test_expect_success '#20b/c: core.worktree without GIT_DIR ignored (bare repository)' '
	# Just like case #16b/c.
	setup_repo 20b non-existent "" true &&
	mkdir -p 20b/.git/wt/sub &&
	try_case 20b/.git unset unset \
		. "(null)" "$here/20b/.git" "(null)" &&
	try_case 20b/.git/wt unset unset \
		"$here/20b/.git" "(null)" "$here/20b/.git/wt" "(null)" &&
	try_case 20b/.git/wt/sub unset unset \
		"$here/20b/.git" "(null)" "$here/20b/.git/wt/sub" "(null)" &&
	try_repo 20c unset unset non-existent "" true \
		.git "(null)" "$here/20c" "(null)" \
		"$here/20c/.git" "(null)" "$here/20c/sub" "(null)"
'

test_expect_success '#21: core.worktree+GIT_WORK_TREE without GIT_DIR ignored (bare cases)' '
	setup_repo 21a non-existent "" unset &&
	mkdir -p 21a/.git/wt/sub &&
	try_case 21a/.git non-existent-too unset \
		. "(null)" "$here/21a/.git" "(null)" &&
	try_case 21a/.git/wt non-existent-too unset \
		"$here/21a/.git" "(null)" "$here/21a/.git/wt" "(null)" &&
	try_case 21a/.git/wt/sub non-existent-too unset \
		"$here/21a/.git" "(null)" "$here/21a/.git/wt/sub" "(null)" &&

	setup_repo 21b non-existent "" true &&
	mkdir -p 21b/.git/wt/sub &&
	try_case 21b/.git non-existent-too unset \
		. "(null)" "$here/21b/.git" "(null)" &&
	try_case 21b/.git/wt non-existent-too unset \
		"$here/21b/.git" "(null)" "$here/21b/.git/wt" "(null)" &&
	try_case 21b/.git/wt/sub non-existent-too unset \
		"$here/21b/.git" "(null)" "$here/21b/.git/wt/sub" "(null)" &&

	try_repo 21c non-existent-too unset non-existent "" true \
		.git "(null)" "$here/21c" "(null)" \
		"$here/21c/.git" "(null)" "$here/21c/sub" "(null)"
'

test_expect_success '#22a: core.worktree = GIT_DIR = .git dir' '
	# like case #6.

	setup_repo 22a "$here/22a/.git" "" unset &&
	setup_repo 22ab . "" unset
	mkdir -p 22a/.git/sub 22a/sub &&
	mkdir -p 22ab/.git/sub 22ab/sub &&
	try_case 22a/.git unset . \
		. "$here/22a/.git" "$here/22a/.git" "(null)" &&
	try_case 22a/.git unset "$here/22a/.git" \
		"$here/22a/.git" "$here/22a/.git" "$here/22a/.git" "(null)" &&
	try_case 22a/.git/sub unset .. \
		"$here/22a/.git" "$here/22a/.git" "$here/22a/.git" sub/ &&
	try_case 22a/.git/sub unset "$here/22a/.git" \
		"$here/22a/.git" "$here/22a/.git" "$here/22a/.git" sub/ &&

	try_case 22ab/.git unset . \
		. "$here/22ab/.git" "$here/22ab/.git" "(null)" &&
	try_case 22ab/.git unset "$here/22ab/.git" \
		"$here/22ab/.git" "$here/22ab/.git" "$here/22ab/.git" "(null)" &&
	try_case 22ab/.git/sub unset .. \
		"$here/22ab/.git" "$here/22ab/.git" "$here/22ab/.git" sub/ &&
	try_case 22ab/.git unset "$here/22ab/.git" \
		"$here/22ab/.git" "$here/22ab/.git" "$here/22ab/.git" "(null)"
'

test_expect_success '#22b: core.worktree child of .git, GIT_DIR=.git' '
	setup_repo 22b "$here/22b/.git/wt" "" unset &&
	setup_repo 22bb wt "" unset &&
	mkdir -p 22b/.git/sub 22b/sub 22b/.git/wt/sub 22b/wt/sub &&
	mkdir -p 22bb/.git/sub 22bb/sub 22bb/.git/wt 22bb/wt &&

	try_case 22b/.git unset . \
		. "$here/22b/.git/wt" "$here/22b/.git" "(null)" &&
	try_case 22b/.git unset "$here/22b/.git" \
		"$here/22b/.git" "$here/22b/.git/wt" "$here/22b/.git" "(null)" &&
	try_case 22b/.git/sub unset .. \
		.. "$here/22b/.git/wt" "$here/22b/.git/sub" "(null)" &&
	try_case 22b/.git/sub unset "$here/22b/.git" \
		"$here/22b/.git" "$here/22b/.git/wt" "$here/22b/.git/sub" "(null)" &&

	try_case 22bb/.git unset . \
		. "$here/22bb/.git/wt" "$here/22bb/.git" "(null)" &&
	try_case 22bb/.git unset "$here/22bb/.git" \
		"$here/22bb/.git" "$here/22bb/.git/wt" "$here/22bb/.git" "(null)" &&
	try_case 22bb/.git/sub unset .. \
		.. "$here/22bb/.git/wt" "$here/22bb/.git/sub" "(null)" &&
	try_case 22bb/.git/sub unset "$here/22bb/.git" \
		"$here/22bb/.git" "$here/22bb/.git/wt" "$here/22bb/.git/sub" "(null)"
'

test_expect_success '#22c: core.worktree = .git/.., GIT_DIR=.git' '
	setup_repo 22c "$here/22c" "" unset &&
	setup_repo 22cb .. "" unset &&
	mkdir -p 22c/.git/sub 22c/sub &&
	mkdir -p 22cb/.git/sub 22cb/sub &&

	try_case 22c/.git unset . \
		"$here/22c/.git" "$here/22c" "$here/22c" .git/ &&
	try_case 22c/.git unset "$here/22c/.git" \
		"$here/22c/.git" "$here/22c" "$here/22c" .git/ &&
	try_case 22c/.git/sub unset .. \
		"$here/22c/.git" "$here/22c" "$here/22c" .git/sub/ &&
	try_case 22c/.git/sub unset "$here/22c/.git" \
		"$here/22c/.git" "$here/22c" "$here/22c" .git/sub/ &&

	try_case 22cb/.git unset . \
		"$here/22cb/.git" "$here/22cb" "$here/22cb" .git/ &&
	try_case 22cb/.git unset "$here/22cb/.git" \
		"$here/22cb/.git" "$here/22cb" "$here/22cb" .git/ &&
	try_case 22cb/.git/sub unset .. \
		"$here/22cb/.git" "$here/22cb" "$here/22cb" .git/sub/ &&
	try_case 22cb/.git/sub unset "$here/22cb/.git" \
		"$here/22cb/.git" "$here/22cb" "$here/22cb" .git/sub/
'

test_expect_success '#22.2: core.worktree and core.bare conflict' '
	setup_repo 22 "$here/22" "" true &&
	(
		cd 22/.git &&
		GIT_DIR=. &&
		export GIT_DIR &&
		test_must_fail git symbolic-ref HEAD 2>result
	) &&
	(
		cd 22 &&
		GIT_DIR=.git &&
		export GIT_DIR &&
		test_must_fail git symbolic-ref HEAD 2>result
	) &&
	grep "core.bare and core.worktree" 22/.git/result &&
	grep "core.bare and core.worktree" 22/result
'

# Case #23: GIT_DIR + GIT_WORK_TREE(+core.worktree) suppresses bareness.
test_expect_success '#23: setup' '
	setup_repo 23 non-existent "" true &&
	mkdir -p 23/sub/sub 23/wt/sub
'
run_wt_tests 23

test_expect_success '#24: bare repo has no worktree (gitfile case)' '
	try_repo 24 unset unset unset gitfile true \
		"$here/24.git" "(null)" "$here/24" "(null)" \
		"$here/24.git" "(null)" "$here/24/sub" "(null)"
'

test_expect_success '#25: GIT_WORK_TREE ignored if GIT_DIR unset (bare gitfile case)' '
	try_repo 25 non-existent unset unset gitfile true \
		"$here/25.git" "(null)" "$here/25" "(null)" \
		"$here/25.git" "(null)" "$here/25/sub" "(null)"
'

test_expect_success '#26: bare repo has no worktree (GIT_DIR -> gitfile case)' '
	try_repo 26 unset "$here/26/.git" unset gitfile true \
		"$here/26.git" "(null)" "$here/26" "(null)" \
		"$here/26.git" "(null)" "$here/26/sub" "(null)" &&
	try_repo 26b unset .git unset gitfile true \
		"$here/26b.git" "(null)" "$here/26b" "(null)" \
		"$here/26b.git" "(null)" "$here/26b/sub" "(null)"
'

# Case #27: GIT_DIR + GIT_WORK_TREE suppresses bareness (with gitfile).
test_expect_success '#27: setup' '
	setup_repo 27 unset gitfile true &&
	mkdir -p 27/sub/sub 27/wt/sub
'
run_wt_tests 27 gitfile

test_expect_success '#28: core.worktree ignored if GIT_DIR unset (bare gitfile case)' '
	try_repo 28 unset unset non-existent gitfile true \
		"$here/28.git" "(null)" "$here/28" "(null)" \
		"$here/28.git" "(null)" "$here/28/sub" "(null)"
'

test_expect_success '#29: GIT_WORK_TREE+core.worktree ignored if GIT_DIR unset (bare gitfile case)' '
	try_repo 29 non-existent-too unset non-existent gitfile true \
		"$here/29.git" "(null)" "$here/29" "(null)" \
		"$here/29.git" "(null)" "$here/29/sub" "(null)"
'

test_expect_success '#30: core.worktree and core.bare conflict (gitfile version)' '
	# Just like case #22.
	setup_repo 30 "$here/30" gitfile true &&
	(
		cd 30 &&
		GIT_DIR=.git &&
		export GIT_DIR &&
		test_must_fail git symbolic-ref HEAD 2>result
	) &&
	grep "core.bare and core.worktree" 30/result
'

# Case #31: GIT_DIR + GIT_WORK_TREE(+core.worktree) suppresses
# bareness (gitfile version).
test_expect_success '#31: setup' '
	setup_repo 31 non-existent gitfile true &&
	mkdir -p 31/sub/sub 31/wt/sub
'
run_wt_tests 31 gitfile

test_done