maintenance(systemd): support the Windows Subsystem for Linux

[git.git] / t / t2400-worktree-add.sh

#!/bin/sh

test_description='test git worktree add'

GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME

TEST_CREATE_REPO_NO_TEMPLATE=1
. ./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 main
'

test_expect_success '"add" an existing empty worktree' '
        mkdir existing_empty &&
        git worktree add --detach existing_empty main
'

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 main &&
        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 main &&
        ! 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 main -- init.t
        )
'

test_expect_success '"add" worktree' '
        git rev-parse HEAD >expect &&
        git worktree add --detach here main &&
        (
                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 worktree add --detach --lock here-with-lock main &&
        test_when_finished "git worktree unlock here-with-lock || :" &&
        test -f .git/worktrees/here-with-lock/locked
'

test_expect_success '"add" worktree with lock and reason' '
        lock_reason="why not" &&
        git worktree add --detach --lock --reason "$lock_reason" here-with-lock-reason main &&
        test_when_finished "git worktree unlock here-with-lock-reason || :" &&
        test -f .git/worktrees/here-with-lock-reason/locked &&
        echo "$lock_reason" >expect &&
        test_cmp expect .git/worktrees/here-with-lock-reason/locked
'

test_expect_success '"add" worktree with reason but no lock' '
        test_must_fail git worktree add --detach --reason "why not" here-with-reason-only main &&
        test_path_is_missing .git/worktrees/here-with-reason-only/locked
'

test_expect_success '"add" worktree from a subdir' '
        (
                mkdir sub &&
                cd sub &&
                git worktree add --detach here main &&
                cd here &&
                test_cmp ../../init.t init.t
        )
'

test_expect_success '"add" from a linked checkout' '
        (
                cd here &&
                git worktree add --detach nested-here main &&
                cd nested-here &&
                git fsck
        )
'

test_expect_success '"add" worktree creating new branch' '
        git worktree add -b newmain there main &&
        (
                cd there &&
                test_cmp ../init.t init.t &&
                git symbolic-ref HEAD >actual &&
                echo refs/heads/newmain >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 newmain
        )
'

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 newmain
'

test_expect_success 'not die the same branch is already checked out' '
        (
                cd here &&
                git worktree add --force anothernewmain newmain
        )
'

test_expect_success 'not die on re-checking out current branch' '
        (
                cd there &&
                git checkout newmain
        )
'

test_expect_success '"add" from a bare repo' '
        (
                git clone --bare . bare &&
                cd bare &&
                git worktree add -b bare-main ../there2 main
        )
'

test_expect_success 'checkout from a bare repo without "add"' '
        (
                cd bare &&
                test_must_fail git checkout main
        )
'

test_expect_success '"add" default branch of a bare repo' '
        (
                git clone --bare . bare2 &&
                cd bare2 &&
                git worktree add ../there3 main &&
                cd ../there3 &&
                # Simple check that a Git command does not
                # immediately fail with the current setup
                git status
        ) &&
        cat >expect <<-EOF &&
        init.t
        EOF
        ls there3 >actual &&
        test_cmp expect actual
'

test_expect_success '"add" to bare repo with worktree config' '
        (
                git clone --bare . bare3 &&
                cd bare3 &&
                git config extensions.worktreeconfig true &&

                # Add config values that are erroneous to have in
                # a config.worktree file outside of the main
                # working tree, to check that Git filters them out
                # when copying config during "git worktree add".
                git config --worktree core.bare true &&
                git config --worktree core.worktree "$(pwd)" &&

                # We want to check that bogus.key is copied
                git config --worktree bogus.key value &&
                git config --unset core.bare &&
                git worktree add ../there4 main &&
                cd ../there4 &&

                # Simple check that a Git command does not
                # immediately fail with the current setup
                git status &&
                git worktree add --detach ../there5 &&
                cd ../there5 &&
                git status
        ) &&

        # the worktree has the arbitrary value copied.
        test_cmp_config -C there4 value bogus.key &&
        test_cmp_config -C there5 value bogus.key &&

        # however, core.bare and core.worktree were removed.
        test_must_fail git -C there4 config core.bare &&
        test_must_fail git -C there4 config core.worktree &&

        cat >expect <<-EOF &&
        init.t
        EOF

        ls there4 >actual &&
        test_cmp expect actual &&
        ls there5 >actual &&
        test_cmp expect actual
'

test_expect_success 'checkout with grafts' '
        test_when_finished rm .git/info/grafts &&
        test_commit abc &&
        SHA1=$(git rev-parse HEAD) &&
        test_commit def &&
        test_commit xyz &&
        mkdir .git/info &&
        echo "$(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 main &&
        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
'

# Helper function to test mutually exclusive options.
#
# Note: Quoted arguments containing spaces are not supported.
test_wt_add_excl () {
        local opts="$*" &&
        test_expect_success "'worktree add' with '$opts' has mutually exclusive options" '
                test_must_fail git worktree add $opts 2>actual &&
                grep -E "fatal:( options)? .* cannot be used together" actual
        '
}

test_wt_add_excl -b poodle -B poodle bamboo main
test_wt_add_excl -b poodle --detach bamboo main
test_wt_add_excl -B poodle --detach bamboo main
test_wt_add_excl --orphan --detach bamboo
test_wt_add_excl --orphan --no-checkout bamboo
test_wt_add_excl --orphan bamboo main
test_wt_add_excl --orphan -b bamboo wtdir/ main

test_expect_success '"add -B" fails if the branch is checked out' '
        git rev-parse newmain >before &&
        test_must_fail git worktree add -B newmain bamboo main &&
        git rev-parse newmain >after &&
        test_cmp before after
'

test_expect_success 'add -B' '
        git worktree add -B poodle bamboo2 main^ &&
        git -C bamboo2 symbolic-ref HEAD >actual &&
        echo refs/heads/poodle >expected &&
        test_cmp expected actual &&
        test_cmp_rev main^ poodle
'

test_expect_success 'add --quiet' '
        test_when_finished "git worktree remove -f -f another-worktree" &&
        git worktree add --quiet another-worktree main 2>actual &&
        test_must_be_empty actual
'

test_expect_success 'add --quiet -b' '
        test_when_finished "git branch -D quietnewbranch" &&
        test_when_finished "git worktree remove -f -f another-worktree" &&
        git worktree add --quiet -b quietnewbranch another-worktree 2>actual &&
        test_must_be_empty actual
'

test_expect_success '"add --orphan"' '
        test_when_finished "git worktree remove -f -f orphandir" &&
        git worktree add --orphan -b neworphan orphandir &&
        echo refs/heads/neworphan >expected &&
        git -C orphandir symbolic-ref HEAD >actual &&
        test_cmp expected actual
'

test_expect_success '"add --orphan (no -b)"' '
        test_when_finished "git worktree remove -f -f neworphan" &&
        git worktree add --orphan neworphan &&
        echo refs/heads/neworphan >expected &&
        git -C neworphan symbolic-ref HEAD >actual &&
        test_cmp expected actual
'

test_expect_success '"add --orphan --quiet"' '
        test_when_finished "git worktree remove -f -f orphandir" &&
        git worktree add --quiet --orphan -b neworphan orphandir 2>log.actual &&
        test_must_be_empty log.actual &&
        echo refs/heads/neworphan >expected &&
        git -C orphandir symbolic-ref HEAD >actual &&
        test_cmp expected actual
'

test_expect_success '"add --orphan" fails if the branch already exists' '
        test_when_finished "git branch -D existingbranch" &&
        git worktree add -b existingbranch orphandir main &&
        git worktree remove orphandir &&
        test_must_fail git worktree add --orphan -b existingbranch orphandir
'

test_expect_success '"add --orphan" with empty repository' '
        test_when_finished "rm -rf empty_repo" &&
        echo refs/heads/newbranch >expected &&
        GIT_DIR="empty_repo" git init --bare &&
        git -C empty_repo worktree add --orphan -b newbranch worktreedir &&
        git -C empty_repo/worktreedir symbolic-ref HEAD >actual &&
        test_cmp expected actual
'

test_expect_success '"add" worktree with orphan branch and lock' '
        git worktree add --lock --orphan -b orphanbr orphan-with-lock &&
        test_when_finished "git worktree unlock orphan-with-lock || :" &&
        test -f .git/worktrees/orphan-with-lock/locked
'

test_expect_success '"add" worktree with orphan branch, lock, and reason' '
        lock_reason="why not" &&
        git worktree add --detach --lock --reason "$lock_reason" orphan-with-lock-reason main &&
        test_when_finished "git worktree unlock orphan-with-lock-reason || :" &&
        test -f .git/worktrees/orphan-with-lock-reason/locked &&
        echo "$lock_reason" >expect &&
        test_cmp expect .git/worktrees/orphan-with-lock-reason/locked
'

# Note: Quoted arguments containing spaces are not supported.
test_wt_add_orphan_hint () {
        local context="$1" &&
        local use_branch=$2 &&
        shift 2 &&
        local opts="$*" &&
        test_expect_success "'worktree add' show orphan hint in bad/orphan HEAD w/ $context" '
                test_when_finished "rm -rf repo" &&
                git init repo &&
                (cd repo && test_commit commit) &&
                git -C repo switch --orphan noref &&
                test_must_fail git -C repo worktree add $opts foobar/ 2>actual &&
                ! grep "error: unknown switch" actual &&
                grep "hint: If you meant to create a worktree containing a new orphan branch" actual &&
                if [ $use_branch -eq 1 ]
                then
                        grep -E "^hint: +git worktree add --orphan -b [^ ]+ [^ ]+$" actual
                else
                        grep -E "^hint: +git worktree add --orphan [^ ]+$" actual
                fi

        '
}

test_wt_add_orphan_hint 'no opts' 0
test_wt_add_orphan_hint '-b' 1 -b foobar_branch
test_wt_add_orphan_hint '-B' 1 -B foobar_branch

test_expect_success "'worktree add' doesn't show orphan hint in bad/orphan HEAD w/ --quiet" '
        test_when_finished "rm -rf repo" &&
        git init repo &&
        (cd repo && test_commit commit) &&
        test_must_fail git -C repo worktree add --quiet foobar_branch foobar/ 2>actual &&
        ! grep "error: unknown switch" actual &&
        ! grep "hint: If you meant to create a worktree containing a new orphan branch" 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 main &&
        test_branch_upstream track . main
'

# setup remote repository $1 and repository $2 with $1 set up as
# remote.  The remote has two branches, main and foo.
setup_remote_repo () {
        git init $1 &&
        (
                cd $1 &&
                test_commit $1_main &&
                git checkout -b foo &&
                test_commit upstream_foo
        ) &&
        git init $2 &&
        (
                cd $2 &&
                test_commit $2_main &&
                git remote add $1 ../$1 &&
                git config remote.$1.fetch \
                        "refs/heads/*:refs/remotes/$1/*" &&
                git fetch --all
        )
}

test_expect_success '"add" <path> <remote/branch> w/ no HEAD' '
        test_when_finished rm -rf repo_upstream repo_local foo &&
        setup_remote_repo repo_upstream repo_local &&
        git -C repo_local config --bool core.bare true &&
        git -C repo_local branch -D main &&
        git -C repo_local worktree add ./foo repo_upstream/foo
'

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 --guess-remote sets up tracking (quiet)' '
        test_when_finished rm -rf repo_a repo_b foo &&
        setup_remote_repo repo_a repo_b &&
        (
                cd repo_b &&
                git worktree add --quiet --guess-remote ../foo 2>actual &&
                test_must_be_empty actual
        ) &&
        (
                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 (quiet)' '
        test_when_finished rm -rf repo_a repo_b foo &&
        setup_remote_repo repo_a repo_b &&
        (
                cd repo_b &&
                git worktree add --quiet --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
        )
'

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
        )
'

test_dwim_orphan () {
        local info_text="No possible source branch, inferring '--orphan'" &&
        local fetch_error_text="fatal: No local or remote refs exist despite at least one remote" &&
        local orphan_hint="hint: If you meant to create a worktree containing a new orphan branch" &&
        local invalid_ref_regex="^fatal: invalid reference: " &&
        local bad_combo_regex="^fatal: '[-a-z]*' and '[-a-z]*' cannot be used together" &&

        local git_ns="repo" &&
        local dashc_args="-C $git_ns" &&
        local use_cd=0 &&

        local bad_head=0 &&
        local empty_repo=1 &&
        local local_ref=0 &&
        local use_quiet=0 &&
        local remote=0 &&
        local remote_ref=0 &&
        local use_detach=0 &&
        local use_new_branch=0 &&

        local outcome="$1" &&
        local outcome_text &&
        local success &&
        shift &&
        local args="" &&
        local context="" &&
        case "$outcome" in
        "infer")
                success=1 &&
                outcome_text='"add" DWIM infer --orphan'
                ;;
        "no_infer")
                success=1 &&
                outcome_text='"add" DWIM doesnt infer --orphan'
                ;;
        "fetch_error")
                success=0 &&
                outcome_text='"add" error need fetch'
                ;;
        "fatal_orphan_bad_combo")
                success=0 &&
                outcome_text='"add" error inferred "--orphan" gives illegal opts combo'
                ;;
        "warn_bad_head")
                success=0 &&
                outcome_text='"add" error, warn on bad HEAD, hint use orphan'
                ;;
        *)
                echo "test_dwim_orphan(): invalid outcome: '$outcome'" >&2 &&
                return 1
                ;;
        esac &&
        while [ $# -gt 0 ]
        do
                case "$1" in
                # How and from where to create the worktree
                "-C_repo")
                        use_cd=0 &&
                        git_ns="repo" &&
                        dashc_args="-C $git_ns" &&
                        context="$context, 'git -C repo'"
                        ;;
                "-C_wt")
                        use_cd=0 &&
                        git_ns="wt" &&
                        dashc_args="-C $git_ns" &&
                        context="$context, 'git -C wt'"
                        ;;
                "cd_repo")
                        use_cd=1 &&
                        git_ns="repo" &&
                        dashc_args="" &&
                        context="$context, 'cd repo && git'"
                        ;;
                "cd_wt")
                        use_cd=1 &&
                        git_ns="wt" &&
                        dashc_args="" &&
                        context="$context, 'cd wt && git'"
                        ;;

                # Bypass the "pull first" warning
                "force")
                        args="$args --force" &&
                        context="$context, --force"
                        ;;

                # Try to use remote refs when DWIM
                "guess_remote")
                        args="$args --guess-remote" &&
                        context="$context, --guess-remote"
                        ;;
                "no_guess_remote")
                        args="$args --no-guess-remote" &&
                        context="$context, --no-guess-remote"
                        ;;

                # Whether there is at least one local branch present
                "local_ref")
                        empty_repo=0 &&
                        local_ref=1 &&
                        context="$context, >=1 local branches"
                        ;;
                "no_local_ref")
                        empty_repo=0 &&
                        context="$context, 0 local branches"
                        ;;

                # Whether the HEAD points at a valid ref (skip this opt when no refs)
                "good_head")
                        # requires: local_ref
                        context="$context, valid HEAD"
                        ;;
                "bad_head")
                        bad_head=1 &&
                        context="$context, invalid (or orphan) HEAD"
                        ;;

                # Whether the code path is tested with the base add command, -b, or --detach
                "no_-b")
                        use_new_branch=0 &&
                        context="$context, no --branch"
                        ;;
                "-b")
                        use_new_branch=1 &&
                        context="$context, --branch"
                        ;;
                "detach")
                        use_detach=1 &&
                        context="$context, --detach"
                        ;;

                # Whether to check that all output is suppressed (except errors)
                # or that the output is as expected
                "quiet")
                        use_quiet=1 &&
                        args="$args --quiet" &&
                        context="$context, --quiet"
                        ;;
                "no_quiet")
                        use_quiet=0 &&
                        context="$context, no --quiet (expect output)"
                        ;;

                # Whether there is at least one remote attached to the repo
                "remote")
                        empty_repo=0 &&
                        remote=1 &&
                        context="$context, >=1 remotes"
                        ;;
                "no_remote")
                        empty_repo=0 &&
                        remote=0 &&
                        context="$context, 0 remotes"
                        ;;

                # Whether there is at least one valid remote ref
                "remote_ref")
                        # requires: remote
                        empty_repo=0 &&
                        remote_ref=1 &&
                        context="$context, >=1 fetched remote branches"
                        ;;
                "no_remote_ref")
                        empty_repo=0 &&
                        remote_ref=0 &&
                        context="$context, 0 fetched remote branches"
                        ;;

                # Options or flags that become illegal when --orphan is inferred
                "no_checkout")
                        args="$args --no-checkout" &&
                        context="$context, --no-checkout"
                        ;;
                "track")
                        args="$args --track" &&
                        context="$context, --track"
                        ;;

                # All other options are illegal
                *)
                        echo "test_dwim_orphan(): invalid arg: '$1'" >&2 &&
                        return 1
                        ;;
                esac &&
                shift
        done &&
        context="${context#', '}" &&
        if [ $use_new_branch -eq 1 ]
        then
                args="$args -b foo"
        elif [ $use_detach -eq 1 ]
        then
                args="$args --detach"
        else
                context="DWIM (no --branch), $context"
        fi &&
        if [ $empty_repo -eq 1 ]
        then
                context="empty repo, $context"
        fi &&
        args="$args ../foo" &&
        context="${context%', '}" &&
        test_expect_success "$outcome_text w/ $context" '
                test_when_finished "rm -rf repo" &&
                git init repo &&
                if [ $local_ref -eq 1 ] && [ "$git_ns" = "repo" ]
                then
                        (cd repo && test_commit commit) &&
                        if [ $bad_head -eq 1 ]
                        then
                                git -C repo symbolic-ref HEAD refs/heads/badbranch
                        fi
                elif [ $local_ref -eq 1 ] && [ "$git_ns" = "wt" ]
                then
                        test_when_finished "git -C repo worktree remove -f ../wt" &&
                        git -C repo worktree add --orphan -b main ../wt &&
                        (cd wt && test_commit commit) &&
                        if [ $bad_head -eq 1 ]
                        then
                                git -C wt symbolic-ref HEAD refs/heads/badbranch
                        fi
                elif [ $local_ref -eq 0 ] && [ "$git_ns" = "wt" ]
                then
                        test_when_finished "git -C repo worktree remove -f ../wt" &&
                        git -C repo worktree add --orphan -b orphanbranch ../wt
                fi &&

                if [ $remote -eq 1 ]
                then
                        test_when_finished "rm -rf upstream" &&
                        git init upstream &&
                        (cd upstream && test_commit commit) &&
                        git -C upstream switch -c foo &&
                        git -C repo remote add upstream ../upstream
                fi &&

                if [ $remote_ref -eq 1 ]
                then
                        git -C repo fetch
                fi &&
                if [ $success -eq 1 ]
                then
                        test_when_finished git -C repo worktree remove ../foo
                fi &&
                (
                        if [ $use_cd -eq 1 ]
                        then
                                cd $git_ns
                        fi &&
                        if [ "$outcome" = "infer" ]
                        then
                                git $dashc_args worktree add $args 2>actual &&
                                if [ $use_quiet -eq 1 ]
                                then
                                        test_must_be_empty actual
                                else
                                        grep "$info_text" actual
                                fi
                        elif [ "$outcome" = "no_infer" ]
                        then
                                git $dashc_args worktree add $args 2>actual &&
                                if [ $use_quiet -eq 1 ]
                                then
                                        test_must_be_empty actual
                                else
                                        ! grep "$info_text" actual
                                fi
                        elif [ "$outcome" = "fetch_error" ]
                        then
                                test_must_fail git $dashc_args worktree add $args 2>actual &&
                                grep "$fetch_error_text" actual
                        elif [ "$outcome" = "fatal_orphan_bad_combo" ]
                        then
                                test_must_fail git $dashc_args worktree add $args 2>actual &&
                                if [ $use_quiet -eq 1 ]
                                then
                                        ! grep "$info_text" actual
                                else
                                        grep "$info_text" actual
                                fi &&
                                grep "$bad_combo_regex" actual
                        elif [ "$outcome" = "warn_bad_head" ]
                        then
                                test_must_fail git $dashc_args worktree add $args 2>actual &&
                                if [ $use_quiet -eq 1 ]
                                then
                                        grep "$invalid_ref_regex" actual &&
                                        ! grep "$orphan_hint" actual
                                else
                                        headpath=$(git $dashc_args rev-parse --path-format=absolute --git-path HEAD) &&
                                        headcontents=$(cat "$headpath") &&
                                        grep "HEAD points to an invalid (or orphaned) reference" actual &&
                                        grep "HEAD path: .$headpath." actual &&
                                        grep "HEAD contents: .$headcontents." actual &&
                                        grep "$orphan_hint" actual &&
                                        ! grep "$info_text" actual
                                fi &&
                                grep "$invalid_ref_regex" actual
                        else
                                # Unreachable
                                false
                        fi
                ) &&
                if [ $success -ne 1 ]
                then
                        test_path_is_missing foo
                fi
        '
}

for quiet_mode in "no_quiet" "quiet"
do
        for changedir_type in "cd_repo" "cd_wt" "-C_repo" "-C_wt"
        do
                dwim_test_args="$quiet_mode $changedir_type"
                test_dwim_orphan 'infer' $dwim_test_args no_-b
                test_dwim_orphan 'no_infer' $dwim_test_args no_-b local_ref good_head
                test_dwim_orphan 'infer' $dwim_test_args no_-b no_local_ref no_remote no_remote_ref no_guess_remote
                test_dwim_orphan 'infer' $dwim_test_args no_-b no_local_ref remote no_remote_ref no_guess_remote
                test_dwim_orphan 'fetch_error' $dwim_test_args no_-b no_local_ref remote no_remote_ref guess_remote
                test_dwim_orphan 'infer' $dwim_test_args no_-b no_local_ref remote no_remote_ref guess_remote force
                test_dwim_orphan 'no_infer' $dwim_test_args no_-b no_local_ref remote remote_ref guess_remote

                test_dwim_orphan 'infer' $dwim_test_args -b
                test_dwim_orphan 'no_infer' $dwim_test_args -b local_ref good_head
                test_dwim_orphan 'infer' $dwim_test_args -b no_local_ref no_remote no_remote_ref no_guess_remote
                test_dwim_orphan 'infer' $dwim_test_args -b no_local_ref remote no_remote_ref no_guess_remote
                test_dwim_orphan 'infer' $dwim_test_args -b no_local_ref remote no_remote_ref guess_remote
                test_dwim_orphan 'infer' $dwim_test_args -b no_local_ref remote remote_ref guess_remote

                test_dwim_orphan 'warn_bad_head' $dwim_test_args no_-b local_ref bad_head
                test_dwim_orphan 'warn_bad_head' $dwim_test_args -b local_ref bad_head
                test_dwim_orphan 'warn_bad_head' $dwim_test_args detach local_ref bad_head
        done

        test_dwim_orphan 'fatal_orphan_bad_combo' $quiet_mode no_-b no_checkout
        test_dwim_orphan 'fatal_orphan_bad_combo' $quiet_mode no_-b track
        test_dwim_orphan 'fatal_orphan_bad_combo' $quiet_mode -b no_checkout
        test_dwim_orphan 'fatal_orphan_bad_combo' $quiet_mode -b track
done

post_checkout_hook () {
        test_when_finished "rm -rf .git/hooks" &&
        mkdir .git/hooks &&
        test_hook -C "$1" 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_config_global protocol.file.allow always &&
        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' '
        test_config_global protocol.file.allow always &&
        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