Currently there is no indication in the "git worktree add" output that
a new branch was created.  This would be especially useful information
in the case where the dwim of "git worktree add <path>" kicks in, as the
user didn't explicitly ask for a new branch, but we create one from
them.

Print some additional output showing that a branch was created and the
branch name to help the user.

This will also be useful in the next commit, which introduces a new kind
of dwim-ery of checking out the branch if it exists instead of refusing
to create a new worktree in that case, and where it's nice to tell the
user which kind of dwim-ery kicked in.

Signed-off-by: Thomas Gummerer <redacted>
---
 builtin/worktree.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/builtin/worktree.c b/builtin/worktree.c
index e5d04f0b4b..2266c132f9 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c

@@ -318,6 +318,9 @@ static int add_worktree(const char *path, const char *refname,
 	if (ret)
 		goto done;
 
+	if (opts->new_branch)
+		fprintf(stderr, _("creating new branch '%s'"), opts->new_branch);
+
 	fprintf(stderr, _("worktree HEAD is now at %s"),
 		find_unique_abbrev(commit->object.oid.hash, DEFAULT_ABBREV));
 

-- 
2.17.0.rc0.231.g781580f06