Add support for creating an orphan branch when adding a new worktree.
The functionality of this flag is equivalent to git switch's --orphan
option.
Current Behavior:
% git -C foo.git --no-pager branch -l
+ main
% git -C foo.git worktree add main/
Preparing worktree (new branch 'main')
HEAD is now at 6c93a75 a commit
%
% git init bar.git
Initialized empty Git repository in /path/to/bar.git/
% git -C bar.git --no-pager branch -l
% git -C bar.git worktree add main/
Preparing worktree (new branch 'main')
fatal: not a valid object name: 'HEAD'
%
New Behavior:
% git -C foo.git --no-pager branch -l
+ main
% git -C foo.git worktree add main/
Preparing worktree (new branch 'main')
HEAD is now at 6c93a75 a commit
%
% git init --bare bar.git
Initialized empty Git repository in /path/to/bar.git/
% git -C bar.git --no-pager branch -l
% git -C bar.git worktree add main/
Preparing worktree (new branch 'main')
fatal: invalid reference: HEAD
% git -C bar.git worktree add --orphan -b main/
Preparing worktree (new branch 'main')
% git -C bar.git worktree add --orphan -b newbranch worktreedir/
Preparing worktree (new branch 'newbranch')
%
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
Signed-off-by: Jacob Abel <jacobabel@xxxxxxxxxx>
---
Documentation/git-worktree.txt | 6 ++-
builtin/worktree.c | 67 +++++++++++++++++++++++++++------
t/t2400-worktree-add.sh | 68 ++++++++++++++++++++++++++++++++++
3 files changed, 129 insertions(+), 12 deletions(-)
diff --git a/Documentation/git-worktree.txt b/Documentation/git-worktree.txt
index b9c12779f1..485d865eb2 100644
--- a/Documentation/git-worktree.txt
+++ b/Documentation/git-worktree.txt
@@ -10,7 +10,7 @@ SYNOPSIS
--------
[verse]
'git worktree add' [-f] [--detach] [--checkout] [--lock [--reason <string>]]
- [(-b | -B) <new-branch>] <path> [<commit-ish>]
+ [--orphan] [(-b | -B) <new-branch>] <path> [<commit-ish>]
'git worktree list' [-v | --porcelain [-z]]
'git worktree lock' [--reason <string>] <worktree>
'git worktree move' <worktree> <new-path>
@@ -222,6 +222,10 @@ This can also be set up as the default behaviour by using the
With `prune`, do not remove anything; just report what it would
remove.
+--orphan::
+ With `add`, make the new worktree and index empty, associating
+ the worktree with a new orphan/unborn branch named `<new-branch>`.
+
--porcelain::
With `list`, output in an easy-to-parse format for scripts.
This format will remain stable across Git versions and regardless of user
diff --git a/builtin/worktree.c b/builtin/worktree.c
index d1b4b53f2c..48de7fc3b0 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c
@@ -22,7 +22,8 @@
#define BUILTIN_WORKTREE_ADD_USAGE \
N_("git worktree add [-f] [--detach] [--checkout] [--lock [--reason <string>]]\n" \
- " [(-b | -B) <new-branch>] <path> [<commit-ish>]")
+ " [--orphan] [(-b | -B) <new-branch>] <path> [<commit-ish>]")
+
#define BUILTIN_WORKTREE_LIST_USAGE \
N_("git worktree list [-v | --porcelain [-z]]")
#define BUILTIN_WORKTREE_LOCK_USAGE \
@@ -95,6 +96,7 @@ struct add_opts {
int detach;
int quiet;
int checkout;
+ int orphan;
const char *keep_locked;
};
@@ -368,6 +370,22 @@ static int checkout_worktree(const struct add_opts *opts,
return run_command(&cp);
}
+static int make_worktree_orphan(const char * ref, const struct add_opts *opts,
+ struct strvec *child_env)
+{
+ struct strbuf symref = STRBUF_INIT;
+ struct child_process cp = CHILD_PROCESS_INIT;
+
+ validate_new_branchname(ref, &symref, 0);
+ strvec_pushl(&cp.args, "symbolic-ref", "HEAD", symref.buf, NULL);
+ if (opts->quiet)
+ strvec_push(&cp.args, "--quiet");
+ strvec_pushv(&cp.env, child_env->v);
+ strbuf_release(&symref);
+ cp.git_cmd = 1;
+ return run_command(&cp);
+}
+
static int add_worktree(const char *path, const char *refname,
const struct add_opts *opts)
{
@@ -397,7 +415,7 @@ static int add_worktree(const char *path, const char *refname,
die_if_checked_out(symref.buf, 0);
}
commit = lookup_commit_reference_by_name(refname);
- if (!commit)
+ if (!commit && !opts->orphan)
die(_("invalid reference: %s"), refname);
name = worktree_basename(path, &len);
@@ -486,10 +504,10 @@ static int add_worktree(const char *path, const char *refname,
strvec_pushf(&child_env, "%s=%s", GIT_WORK_TREE_ENVIRONMENT, path);
cp.git_cmd = 1;
- if (!is_branch)
+ if (!is_branch && commit) {
strvec_pushl(&cp.args, "update-ref", "HEAD",
oid_to_hex(&commit->object.oid), NULL);
- else {
+ } else {
strvec_pushl(&cp.args, "symbolic-ref", "HEAD",
symref.buf, NULL);
if (opts->quiet)
@@ -501,6 +519,10 @@ static int add_worktree(const char *path, const char *refname,
if (ret)
goto done;
+ if (opts->orphan &&
+ (ret = make_worktree_orphan(refname, opts, &child_env)))
+ goto done;
+
if (opts->checkout &&
(ret = checkout_worktree(opts, &child_env)))
goto done;
@@ -520,7 +542,7 @@ static int add_worktree(const char *path, const char *refname,
* Hook failure does not warrant worktree deletion, so run hook after
* is_junk is cleared, but do return appropriate code when hook fails.
*/
- if (!ret && opts->checkout) {
+ if (!ret && opts->checkout && !opts->orphan) {
struct run_hooks_opt opt = RUN_HOOKS_OPT_INIT;
strvec_pushl(&opt.env, "GIT_DIR", "GIT_WORK_TREE", NULL);
@@ -568,7 +590,7 @@ static void print_preparing_worktree_line(int detach,
else {
struct commit *commit = lookup_commit_reference_by_name(branch);
if (!commit)
- die(_("invalid reference: %s"), branch);
+ BUG(_("unreachable: invalid reference: %s"), branch);
fprintf_ln(stderr, _("Preparing worktree (detached HEAD %s)"),
repo_find_unique_abbrev(the_repository, &commit->object.oid, DEFAULT_ABBREV));
}
@@ -620,6 +642,7 @@ static int add(int ac, const char **av, const char *prefix)
N_("create a new branch")),
OPT_STRING('B', NULL, &new_branch_force, N_("branch"),
N_("create or reset a branch")),
+ OPT_BOOL(0, "orphan", &opts.orphan, N_("create unborn/orphaned branch")),
OPT_BOOL('d', "detach", &opts.detach, N_("detach HEAD at named commit")),
OPT_BOOL(0, "checkout", &opts.checkout, N_("populate the new working tree")),
OPT_BOOL(0, "lock", &keep_locked, N_("keep the new working tree locked")),
@@ -640,6 +663,17 @@ static int add(int ac, const char **av, const char *prefix)
ac = parse_options(ac, av, prefix, options, git_worktree_add_usage, 0);
if (!!opts.detach + !!new_branch + !!new_branch_force > 1)
die(_("options '%s', '%s', and '%s' cannot be used together"), "-b", "-B", "--detach");
+ if (opts.detach && opts.orphan)
+ die(_("options '%s', and '%s' cannot be used together"),
+ "--orphan", "--detach");
+ if (opts.orphan && opt_track)
+ die(_("'%s' and '%s' cannot be used together"), "--orphan", "--track");
+ if (opts.orphan && !opts.checkout)
+ die(_("'%s' and '%s' cannot be used together"), "--orphan",
+ "--no-checkout");
+ if (opts.orphan && ac == 2)
+ die(_("'%s' and '%s' cannot be used together"), "--orphan",
+ _("<commit-ish>"));
if (lock_reason && !keep_locked)
die(_("the option '%s' requires '%s'"), "--reason", "--lock");
if (lock_reason)
@@ -668,13 +702,17 @@ static int add(int ac, const char **av, const char *prefix)
strbuf_release(&symref);
}
- if (ac < 2 && !new_branch && !opts.detach) {
+ if (opts.orphan && !new_branch) {
+ int n;
+ const char *s = worktree_basename(path, &n);
+ new_branch = xstrndup(s, n);
+ } else if (new_branch || opts.detach || opts.orphan) {
+ // No-op
+ } else if (ac < 2) {
const char *s = dwim_branch(path, &new_branch);
if (s)
branch = s;
- }
-
- if (ac == 2 && !new_branch && !opts.detach) {
+ } else if (ac == 2) {
struct object_id oid;
struct commit *commit;
const char *remote;
@@ -688,10 +726,17 @@ static int add(int ac, const char **av, const char *prefix)
}
}
}
+
+ if (!opts.orphan && !lookup_commit_reference_by_name(branch)) {
+ die(_("invalid reference: %s"), branch);
+ }
+
if (!opts.quiet)
print_preparing_worktree_line(opts.detach, branch, new_branch, !!new_branch_force);
- if (new_branch) {
+ if (opts.orphan) {
+ branch = new_branch;
+ } else if (new_branch) {
struct child_process cp = CHILD_PROCESS_INIT;
cp.git_cmd = 1;
strvec_push(&cp.args, "branch");
diff --git a/t/t2400-worktree-add.sh b/t/t2400-worktree-add.sh
index 841f15f59e..fba90582b6 100755
--- a/t/t2400-worktree-add.sh
+++ b/t/t2400-worktree-add.sh
@@ -312,6 +312,10 @@ test_wt_add_excl () {
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 &&
@@ -341,6 +345,62 @@ test_expect_success 'add --quiet -b' '
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
+'
+
test_expect_success 'local clone from linked checkout' '
git clone --local here here-clone &&
( cd here-clone && git fsck )
@@ -457,6 +517,14 @@ setup_remote_repo () {
)
}
+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 &&
--
2.39.3
