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branch: add a dry_run parameter to create_branch()

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Add a dry_run parameter to create_branch() such that dry_run = 1 will
validate a new branch without trying to create it. This will be used in
`git branch --recurse-submodules` to ensure that the new branch can be
created in all submodules.

Signed-off-by: Glen Choo <chooglen@google.com>
Reviewed-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Glen Choo
2022-01-28 16:04:43 -08:00
committed by Junio C Hamano
parent bc0893cf3b
commit 3f3e76082b
4 changed files with 11 additions and 4 deletions
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5
branch.c
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@ -423,7 +423,7 @@ static void dwim_branch_start(struct repository *r, const char *start_name,
void create_branch(struct repository *r,
const char *name, const char *start_name,
int force, int clobber_head_ok, int reflog,
int quiet, enum branch_track track)
int quiet, enum branch_track track, int dry_run)
{
struct object_id oid;
char *real_ref;
@ -445,6 +445,8 @@ void create_branch(struct repository *r,
}
dwim_branch_start(r, start_name, track, &real_ref, &oid);
if (dry_run)
goto cleanup;
if (reflog)
log_all_ref_updates = LOG_REFS_NORMAL;
@ -467,6 +469,7 @@ void create_branch(struct repository *r,
if (real_ref && track)
setup_tracking(ref.buf + 11, real_ref, track, quiet);
cleanup:
strbuf_release(&ref);
free(real_ref);
}