From: Ronnie Sahlberg <sahlb...@google.com> Create a version of verify_refname_available that backends can use, and add it to refs/refs-internal.h.
Signed-off-by: Ronnie Sahlberg <sahlb...@google.com> Signed-off-by: David Turner <dtur...@twopensource.com> Signed-off-by: Junio C Hamano <gits...@pobox.com> Signed-off-by: Michael Haggerty <mhag...@alum.mit.edu> --- refs/files-backend.c | 65 ++++++++++++++++++++++++---------------------------- refs/refs-internal.h | 20 ++++++++++++++++ 2 files changed, 50 insertions(+), 35 deletions(-) diff --git a/refs/files-backend.c b/refs/files-backend.c index 20e2924..e0ae769 100644 --- a/refs/files-backend.c +++ b/refs/files-backend.c @@ -135,7 +135,7 @@ struct ref_dir { * presence of an empty subdirectory does not block the creation of a * similarly-named reference. (The fact that reference names with the * same leading components can conflict *with each other* is a - * separate issue that is regulated by verify_refname_available().) + * separate issue that is regulated by verify_refname_available_dir().) * * Please note that the name field contains the fully-qualified * reference (or subdirectory) name. Space could be saved by only @@ -720,25 +720,13 @@ static int nonmatching_ref_fn(struct ref_entry *entry, void *vdata) /* * Return 0 if a reference named refname could be created without * conflicting with the name of an existing reference in dir. - * Otherwise, return a negative value and write an explanation to err. - * If extras is non-NULL, it is a list of additional refnames with - * which refname is not allowed to conflict. If skip is non-NULL, - * ignore potential conflicts with refs in skip (e.g., because they - * are scheduled for deletion in the same operation). Behavior is - * undefined if the same name is listed in both extras and skip. - * - * Two reference names conflict if one of them exactly matches the - * leading components of the other; e.g., "refs/foo/bar" conflicts - * with both "refs/foo" and with "refs/foo/bar/baz" but not with - * "refs/foo/bar" or "refs/foo/barbados". - * - * extras and skip must be sorted. + * See verify_refname_available for details. */ -static int verify_refname_available(const char *refname, - const struct string_list *extras, - const struct string_list *skip, - struct ref_dir *dir, - struct strbuf *err) +static int verify_refname_available_dir(const char *refname, + const struct string_list *extras, + const struct string_list *skip, + struct ref_dir *dir, + struct strbuf *err) { const char *slash; int pos; @@ -1942,9 +1930,12 @@ static struct ref_lock *lock_ref_sha1_basic(const char *refname, */ strbuf_git_path(&orig_ref_file, "%s", orig_refname); if (remove_empty_directories(&orig_ref_file)) { + struct ref_dir *loose_refs; + loose_refs = get_loose_refs(&ref_cache); last_errno = errno; - if (!verify_refname_available(orig_refname, extras, skip, - get_loose_refs(&ref_cache), err)) + if (!verify_refname_available_dir(orig_refname, extras, + skip, loose_refs, + err)) strbuf_addf(err, "there are still refs under '%s'", orig_refname); goto error_return; @@ -1957,8 +1948,9 @@ static struct ref_lock *lock_ref_sha1_basic(const char *refname, if (!refname) { last_errno = errno; if (last_errno != ENOTDIR || - !verify_refname_available(orig_refname, extras, skip, - get_loose_refs(&ref_cache), err)) + !verify_refname_available_dir(orig_refname, extras, skip, + get_loose_refs(&ref_cache), + err)) strbuf_addf(err, "unable to resolve reference %s: %s", orig_refname, strerror(last_errno)); @@ -1971,8 +1963,8 @@ static struct ref_lock *lock_ref_sha1_basic(const char *refname, * our refname. */ if (is_null_oid(&lock->old_oid) && - verify_refname_available(refname, extras, skip, - get_packed_refs(&ref_cache), err)) { + verify_refname_available_dir(refname, extras, skip, + get_packed_refs(&ref_cache), err)) { last_errno = ENOTDIR; goto error_return; } @@ -2476,10 +2468,7 @@ static int rename_ref_available(const char *oldname, const char *newname) int ret; string_list_insert(&skip, oldname); - ret = !verify_refname_available(newname, NULL, &skip, - get_packed_refs(&ref_cache), &err) - && !verify_refname_available(newname, NULL, &skip, - get_loose_refs(&ref_cache), &err); + ret = !verify_refname_available(newname, NULL, &skip, &err); if (!ret) error("%s", err.buf); @@ -2612,6 +2601,17 @@ static int commit_ref(struct ref_lock *lock) return 0; } +int verify_refname_available(const char *newname, struct string_list *extra, + struct string_list *skip, struct strbuf *err) +{ + struct ref_dir *packed_refs = get_packed_refs(&ref_cache); + struct ref_dir *loose_refs = get_loose_refs(&ref_cache); + return verify_refname_available_dir(newname, extra, skip, + packed_refs, err) || + verify_refname_available_dir(newname, extra, skip, + loose_refs, err); +} + /* * Create a reflog for a ref. If force_create = 0, the reflog will * only be created for certain refs (those for which @@ -3327,8 +3327,6 @@ static int ref_present(const char *refname, int initial_ref_transaction_commit(struct ref_transaction *transaction, struct strbuf *err) { - struct ref_dir *loose_refs = get_loose_refs(&ref_cache); - struct ref_dir *packed_refs = get_packed_refs(&ref_cache); int ret = 0, i; int n = transaction->nr; struct ref_update **updates = transaction->updates; @@ -3371,10 +3369,7 @@ int initial_ref_transaction_commit(struct ref_transaction *transaction, die("BUG: initial ref transaction with old_sha1 set"); if (verify_refname_available(update->refname, &affected_refnames, NULL, - loose_refs, err) || - verify_refname_available(update->refname, - &affected_refnames, NULL, - packed_refs, err)) { + err)) { ret = TRANSACTION_NAME_CONFLICT; goto cleanup; } diff --git a/refs/refs-internal.h b/refs/refs-internal.h index 5f447d4..f6a79b9 100644 --- a/refs/refs-internal.h +++ b/refs/refs-internal.h @@ -93,6 +93,26 @@ enum peel_status { */ enum peel_status peel_object(const unsigned char *name, unsigned char *sha1); +/* + * Return 0 if a reference named refname could be created without + * conflicting with the name of an existing reference. + * Otherwise, return a negative value and write an explanation to err. + * If extras is non-NULL, it is a list of additional refnames with + * which refname is not allowed to conflict. If skip is non-NULL, + * ignore potential conflicts with refs in skip (e.g., because they + * are scheduled for deletion in the same operation). Behavior is + * undefined if the same name is listed in both extras and skip. + * + * Two reference names conflict if one of them exactly matches the + * leading components of the other; e.g., "foo/bar" conflicts with + * both "foo" and with "foo/bar/baz" but not with "foo/bar" or + * "foo/barbados". + * + * skip must be sorted. + */ +int verify_refname_available(const char *newname, struct string_list *extra, + struct string_list *skip, struct strbuf *err); + /** * Information needed for a single ref update. Set new_sha1 to the new * value or to null_sha1 to delete the ref. To check the old value -- 2.6.2 -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html