char *ref_name;
char *orig_ref_name;
struct lock_file *lk;
- unsigned char old_sha1[20];
+ struct object_id old_oid;
};
/*
/* Store the old value, in case this is a recursive call: */
old_current_ref = current_ref;
current_ref = entry;
- retval = data->fn(entry->name + data->trim, entry->u.value.oid.hash,
+ retval = data->fn(entry->name + data->trim, &entry->u.value.oid,
entry->flag, data->cb_data);
current_ref = old_current_ref;
return retval;
create_dir_entry(refs, refname.buf,
refname.len, 1));
} else {
+ int read_ok;
+
if (*refs->name) {
hashclr(sha1);
flag = 0;
- if (resolve_gitlink_ref(refs->name, refname.buf, sha1) < 0) {
- hashclr(sha1);
- flag |= REF_ISBROKEN;
- }
- } else if (read_ref_full(refname.buf,
- RESOLVE_REF_READING,
- sha1, &flag)) {
+ read_ok = !resolve_gitlink_ref(refs->name,
+ refname.buf, sha1);
+ } else {
+ read_ok = !read_ref_full(refname.buf,
+ RESOLVE_REF_READING,
+ sha1, &flag);
+ }
+
+ if (!read_ok) {
hashclr(sha1);
flag |= REF_ISBROKEN;
+ } else if (is_null_sha1(sha1)) {
+ /*
+ * It is so astronomically unlikely
+ * that NULL_SHA1 is the SHA-1 of an
+ * actual object that we consider its
+ * appearance in a loose reference
+ * file to be repo corruption
+ * (probably due to a software bug).
+ */
+ flag |= REF_ISBROKEN;
}
+
if (check_refname_format(refname.buf,
REFNAME_ALLOW_ONELEVEL)) {
if (!refname_is_safe(refname.buf))
return !!resolve_ref_unsafe(refname, RESOLVE_REF_READING, sha1, NULL);
}
-static int filter_refs(const char *refname, const unsigned char *sha1, int flags,
- void *data)
+static int filter_refs(const char *refname, const struct object_id *oid,
+ int flags, void *data)
{
struct ref_filter *filter = (struct ref_filter *)data;
+
if (wildmatch(filter->pattern, refname, 0, NULL))
return 0;
- return filter->fn(refname, sha1, flags, filter->cb_data);
+ return filter->fn(refname, oid, flags, filter->cb_data);
}
enum peel_status {
const char *msg_fmt;
};
-static int warn_if_dangling_symref(const char *refname, const unsigned char *sha1,
+static int warn_if_dangling_symref(const char *refname, const struct object_id *oid,
int flags, void *cb_data)
{
struct warn_if_dangling_data *d = cb_data;
const char *resolves_to;
- unsigned char junk[20];
+ struct object_id junk;
if (!(flags & REF_ISSYMREF))
return 0;
- resolves_to = resolve_ref_unsafe(refname, 0, junk, NULL);
+ resolves_to = resolve_ref_unsafe(refname, 0, junk.hash, NULL);
if (!resolves_to
|| (d->refname
? strcmp(resolves_to, d->refname)
static int do_head_ref(const char *submodule, each_ref_fn fn, void *cb_data)
{
- unsigned char sha1[20];
+ struct object_id oid;
int flag;
if (submodule) {
- if (resolve_gitlink_ref(submodule, "HEAD", sha1) == 0)
- return fn("HEAD", sha1, 0, cb_data);
+ if (resolve_gitlink_ref(submodule, "HEAD", oid.hash) == 0)
+ return fn("HEAD", &oid, 0, cb_data);
return 0;
}
- if (!read_ref_full("HEAD", RESOLVE_REF_READING, sha1, &flag))
- return fn("HEAD", sha1, flag, cb_data);
+ if (!read_ref_full("HEAD", RESOLVE_REF_READING, oid.hash, &flag))
+ return fn("HEAD", &oid, flag, cb_data);
return 0;
}
{
struct strbuf buf = STRBUF_INIT;
int ret = 0;
- unsigned char sha1[20];
+ struct object_id oid;
int flag;
strbuf_addf(&buf, "%sHEAD", get_git_namespace());
- if (!read_ref_full(buf.buf, RESOLVE_REF_READING, sha1, &flag))
- ret = fn(buf.buf, sha1, flag, cb_data);
+ if (!read_ref_full(buf.buf, RESOLVE_REF_READING, oid.hash, &flag))
+ ret = fn(buf.buf, &oid, flag, cb_data);
strbuf_release(&buf);
return ret;
free(lock);
}
-/* This function should make sure errno is meaningful on error */
-static struct ref_lock *verify_lock(struct ref_lock *lock,
- const unsigned char *old_sha1, int mustexist)
+/*
+ * Verify that the reference locked by lock has the value old_sha1.
+ * Fail if the reference doesn't exist and mustexist is set. Return 0
+ * on success. On error, write an error message to err, set errno, and
+ * return a negative value.
+ */
+static int verify_lock(struct ref_lock *lock,
+ const unsigned char *old_sha1, int mustexist,
+ struct strbuf *err)
{
+ assert(err);
+
if (read_ref_full(lock->ref_name,
mustexist ? RESOLVE_REF_READING : 0,
- lock->old_sha1, NULL)) {
+ lock->old_oid.hash, NULL)) {
int save_errno = errno;
- error("Can't verify ref %s", lock->ref_name);
- unlock_ref(lock);
+ strbuf_addf(err, "can't verify ref %s", lock->ref_name);
errno = save_errno;
- return NULL;
+ return -1;
}
- if (hashcmp(lock->old_sha1, old_sha1)) {
- error("Ref %s is at %s but expected %s", lock->ref_name,
- sha1_to_hex(lock->old_sha1), sha1_to_hex(old_sha1));
- unlock_ref(lock);
+ if (hashcmp(lock->old_oid.hash, old_sha1)) {
+ strbuf_addf(err, "ref %s is at %s but expected %s",
+ lock->ref_name,
+ sha1_to_hex(lock->old_oid.hash),
+ sha1_to_hex(old_sha1));
errno = EBUSY;
- return NULL;
+ return -1;
}
- return lock;
+ return 0;
}
static int remove_empty_directories(const char *file)
}
refname = resolve_ref_unsafe(refname, resolve_flags,
- lock->old_sha1, &type);
+ lock->old_oid.hash, &type);
if (!refname && errno == EISDIR) {
/* we are trying to lock foo but we used to
* have foo/bar which now does not exist;
goto error_return;
}
refname = resolve_ref_unsafe(orig_refname, resolve_flags,
- lock->old_sha1, &type);
+ lock->old_oid.hash, &type);
}
if (type_p)
*type_p = type;
* refname, nor a packed ref whose name is a proper prefix of
* our refname.
*/
- if (is_null_sha1(lock->old_sha1) &&
+ if (is_null_oid(&lock->old_oid) &&
verify_refname_available(refname, extras, skip,
get_packed_refs(&ref_cache), err)) {
last_errno = ENOTDIR;
goto error_return;
}
}
- return old_sha1 ? verify_lock(lock, old_sha1, mustexist) : lock;
+ if (old_sha1 && verify_lock(lock, old_sha1, mustexist, err)) {
+ last_errno = errno;
+ goto error_return;
+ }
+ return lock;
error_return:
unlock_ref(lock);
strbuf_release(&err);
goto rollback;
}
- hashcpy(lock->old_sha1, orig_sha1);
+ hashcpy(lock->old_oid.hash, orig_sha1);
if (write_ref_to_lockfile(lock, orig_sha1) ||
commit_ref_update(lock, orig_sha1, logmsg)) {
const unsigned char *sha1, const char *logmsg)
{
clear_loose_ref_cache(&ref_cache);
- if (log_ref_write(lock->ref_name, lock->old_sha1, sha1, logmsg) < 0 ||
+ if (log_ref_write(lock->ref_name, lock->old_oid.hash, sha1, logmsg) < 0 ||
(strcmp(lock->ref_name, lock->orig_ref_name) &&
- log_ref_write(lock->orig_ref_name, lock->old_sha1, sha1, logmsg) < 0)) {
+ log_ref_write(lock->orig_ref_name, lock->old_oid.hash, sha1, logmsg) < 0)) {
unlock_ref(lock);
return -1;
}
head_sha1, &head_flag);
if (head_ref && (head_flag & REF_ISSYMREF) &&
!strcmp(head_ref, lock->ref_name))
- log_ref_write("HEAD", lock->old_sha1, sha1, logmsg);
+ log_ref_write("HEAD", lock->old_oid.hash, sha1, logmsg);
}
if (commit_ref(lock)) {
error("Couldn't set %s", lock->ref_name);
strbuf_addch(name, '/');
retval = do_for_each_reflog(name, fn, cb_data);
} else {
- unsigned char sha1[20];
- if (read_ref_full(name->buf, 0, sha1, NULL))
+ struct object_id oid;
+
+ if (read_ref_full(name->buf, 0, oid.hash, NULL))
retval = error("bad ref for %s", name->buf);
else
- retval = fn(name->buf, sha1, 0, cb_data);
+ retval = fn(name->buf, &oid, 0, cb_data);
}
if (retval)
break;
? TRANSACTION_NAME_CONFLICT
: TRANSACTION_GENERIC_ERROR;
reason = strbuf_detach(err, NULL);
- strbuf_addf(err, "Cannot lock ref '%s': %s",
+ strbuf_addf(err, "cannot lock ref '%s': %s",
update->refname, reason);
free(reason);
goto cleanup;
(update->flags & REF_NODEREF));
if (!overwriting_symref &&
- !hashcmp(update->lock->old_sha1, update->new_sha1)) {
+ !hashcmp(update->lock->old_oid.hash, update->new_sha1)) {
/*
* The reference already has the desired
* value, so we don't need to write it.
* write_ref_to_lockfile():
*/
update->lock = NULL;
- strbuf_addf(err, "Cannot update the ref '%s'.",
+ strbuf_addf(err, "cannot update the ref '%s'.",
update->refname);
ret = TRANSACTION_GENERIC_ERROR;
goto cleanup;