Adds a new advice/hint in `git worktree add` for when the user
tries to create a new worktree from a reference that doesn't exist.
Signed-off-by: Jacob Abel <jacobabel@xxxxxxxxxx>
---
Documentation/config/advice.txt | 4 ++++
advice.c | 1 +
advice.h | 1 +
builtin/worktree.c | 8 ++++++++
t/t2400-worktree-add.sh | 16 ++++++++++++++++
5 files changed, 30 insertions(+)
diff --git a/Documentation/config/advice.txt b/Documentation/config/advice.txt
index a00d0100a8..3e58521613 100644
--- a/Documentation/config/advice.txt
+++ b/Documentation/config/advice.txt
@@ -136,4 +136,8 @@ advice.*::
Advice shown when either linkgit:git-add[1] or linkgit:git-rm[1]
is asked to update index entries outside the current sparse
checkout.
+ worktreeAddOrphan::
+ Advice shown when a user tries to create a worktree from an
+ invalid reference, to instruct how to create a new orphan
+ branch instead.
--
diff --git a/advice.c b/advice.c
index fd18968943..53e91fdb85 100644
--- a/advice.c
+++ b/advice.c
@@ -75,6 +75,7 @@ static struct {
[ADVICE_SUBMODULES_NOT_UPDATED] = { "submodulesNotUpdated", 1 },
[ADVICE_UPDATE_SPARSE_PATH] = { "updateSparsePath", 1 },
[ADVICE_WAITING_FOR_EDITOR] = { "waitingForEditor", 1 },
+ [ADVICE_WORKTREE_ADD_ORPHAN] = { "worktreeAddOrphan", 1 },
};
static const char turn_off_instructions[] =
diff --git a/advice.h b/advice.h
index 07e0f76833..919d8c0064 100644
--- a/advice.h
+++ b/advice.h
@@ -50,6 +50,7 @@ struct string_list;
ADVICE_UPDATE_SPARSE_PATH,
ADVICE_WAITING_FOR_EDITOR,
ADVICE_SKIPPED_CHERRY_PICKS,
+ ADVICE_WORKTREE_ADD_ORPHAN,
};
int git_default_advice_config(const char *var, const char *value);
diff --git a/builtin/worktree.c b/builtin/worktree.c
index 51b247b2a7..ea306e18de 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c
@@ -744,6 +744,14 @@ static int add(int ac, const char **av, const char *prefix)
* If `branch` does not reference a valid commit, a new
* worktree (and/or branch) cannot be created based off of it.
*/
+ advise_if_enabled(ADVICE_WORKTREE_ADD_ORPHAN,
+ "If you meant to create a worktree containing a new orphan branch\n"
+ "(branch with no commits) for this repository, e.g. '%s',\n"
+ "you can do so using the --orphan option:\n"
+ "\n"
+ " git worktree add --orphan %s %s\n"
+ "\n",
+ new_branch, new_branch, path);
die(_("invalid reference: %s"), branch);
} else if (new_branch) {
struct child_process cp = CHILD_PROCESS_INIT;
diff --git a/t/t2400-worktree-add.sh b/t/t2400-worktree-add.sh
index 6118ace92d..455cddcdd2 100755
--- a/t/t2400-worktree-add.sh
+++ b/t/t2400-worktree-add.sh
@@ -376,6 +376,22 @@ test_expect_success '"add" worktree with orphan branch, lock, and reason' '
test_cmp expect .git/worktrees/orphan-with-lock-reason/locked
'
+# Helper function to test hints for using --orphan in an empty repo.
+test_wt_add_empty_repo_orphan_hint() {
+ local context="$1" &&
+ local opts="${@:2}" &&
+ test_expect_success "'worktree add' show orphan hint in empty repo w/ $context" '
+ test_when_finished "rm -rf empty_repo" &&
+ GIT_DIR="empty_repo" git init --bare &&
+ test_must_fail git -C empty_repo worktree add $opts 2> actual &&
+ grep "hint: If you meant to create a worktree containing a new orphan branch" actual
+ '
+}
+
+test_wt_add_empty_repo_orphan_hint 'DWIM' foobar/
+test_wt_add_empty_repo_orphan_hint '-b' -b foobar_branch foobar/
+test_wt_add_empty_repo_orphan_hint '-B' -B foobar_branch foobar/
+
test_expect_success 'local clone from linked checkout' '
git clone --local here here-clone &&
( cd here-clone && git fsck )
--
2.37.4
