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tag: disallow '-' as tag name

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Disallow '-' as tag name, as well as tag names starting with '-', as it
would be cumbersome to "git checkout tags/-" because "git checkout -" is
to switch to the previous branch.

Add strbuf_check_tag_ref() as helper to check a refname for a tag.

Signed-off-by: Michael Schubert <mschub@elegosoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Michael Schubert 2011-05-10 01:36:36 +02:00 committed by Junio C Hamano
parent ec014eac0e
commit 4f0accd638
1 changed files with 18 additions and 8 deletions
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26
builtin/tag.c
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@ -352,11 +352,22 @@ static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
return 0;
}
static int strbuf_check_tag_ref(struct strbuf *sb, const char *name)
{
if (name[0] == '-')
return CHECK_REF_FORMAT_ERROR;
strbuf_reset(sb);
strbuf_addf(sb, "refs/tags/%s", name);
return check_ref_format(sb->buf);
}
int cmd_tag(int argc, const char **argv, const char *prefix)
{
struct strbuf buf = STRBUF_INIT;
struct strbuf ref = STRBUF_INIT;
unsigned char object[20], prev[20];
char ref[PATH_MAX];
const char *object_ref, *tag;
struct ref_lock *lock;
@ -452,12 +463,10 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
if (get_sha1(object_ref, object))
die(_("Failed to resolve '%s' as a valid ref."), object_ref);
if (snprintf(ref, sizeof(ref), "refs/tags/%s", tag) > sizeof(ref) - 1)
die(_("tag name too long: %.*s..."), 50, tag);
if (check_ref_format(ref))
if (strbuf_check_tag_ref(&ref, tag))
die(_("'%s' is not a valid tag name."), tag);
if (!resolve_ref(ref, prev, 1, NULL))
if (!resolve_ref(ref.buf, prev, 1, NULL))
hashclr(prev);
else if (!force)
die(_("tag '%s' already exists"), tag);
@ -466,14 +475,15 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
create_tag(object, tag, &buf, msg.given || msgfile,
sign, prev, object);
lock = lock_any_ref_for_update(ref, prev, 0);
lock = lock_any_ref_for_update(ref.buf, prev, 0);
if (!lock)
die(_("%s: cannot lock the ref"), ref);
die(_("%s: cannot lock the ref"), ref.buf);
if (write_ref_sha1(lock, object, NULL) < 0)
die(_("%s: cannot update the ref"), ref);
die(_("%s: cannot update the ref"), ref.buf);
if (force && hashcmp(prev, object))
printf(_("Updated tag '%s' (was %s)\n"), tag, find_unique_abbrev(prev, DEFAULT_ABBREV));
strbuf_release(&buf);
strbuf_release(&ref);
return 0;
}