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Diffstat (limited to 'refs.c')
-rw-r--r--refs.c142
1 files changed, 78 insertions, 64 deletions
diff --git a/refs.c b/refs.c
index 8480d8dbf5..26d1ac1e32 100644
--- a/refs.c
+++ b/refs.c
@@ -10,7 +10,7 @@ struct ref_lock {
char *ref_name;
char *orig_ref_name;
struct lock_file *lk;
- unsigned char old_sha1[20];
+ struct object_id old_oid;
};
/*
@@ -161,7 +161,7 @@ struct ref_value {
* null. If REF_ISSYMREF, then this is the name of the object
* referred to by the last reference in the symlink chain.
*/
- unsigned char sha1[20];
+ struct object_id oid;
/*
* If REF_KNOWS_PEELED, then this field holds the peeled value
@@ -169,7 +169,7 @@ struct ref_value {
* be peelable. See the documentation for peel_ref() for an
* exact definition of "peelable".
*/
- unsigned char peeled[20];
+ struct object_id peeled;
};
struct ref_cache;
@@ -351,8 +351,8 @@ static struct ref_entry *create_ref_entry(const char *refname,
die("Reference has invalid format: '%s'", refname);
len = strlen(refname) + 1;
ref = xmalloc(sizeof(struct ref_entry) + len);
- hashcpy(ref->u.value.sha1, sha1);
- hashclr(ref->u.value.peeled);
+ hashcpy(ref->u.value.oid.hash, sha1);
+ oidclr(&ref->u.value.peeled);
memcpy(ref->name, refname, len);
ref->flag = flag;
return ref;
@@ -626,7 +626,7 @@ static int is_dup_ref(const struct ref_entry *ref1, const struct ref_entry *ref2
/* This is impossible by construction */
die("Reference directory conflict: %s", ref1->name);
- if (hashcmp(ref1->u.value.sha1, ref2->u.value.sha1))
+ if (oidcmp(&ref1->u.value.oid, &ref2->u.value.oid))
die("Duplicated ref, and SHA1s don't match: %s", ref1->name);
warning("Duplicated ref: %s", ref1->name);
@@ -674,7 +674,7 @@ static int ref_resolves_to_object(struct ref_entry *entry)
{
if (entry->flag & REF_ISBROKEN)
return 0;
- if (!has_sha1_file(entry->u.value.sha1)) {
+ if (!has_sha1_file(entry->u.value.oid.hash)) {
error("%s does not point to a valid object!", entry->name);
return 0;
}
@@ -722,7 +722,7 @@ static int do_one_ref(struct ref_entry *entry, void *cb_data)
/* 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.sha1,
+ retval = data->fn(entry->name + data->trim, &entry->u.value.oid,
entry->flag, data->cb_data);
current_ref = old_current_ref;
return retval;
@@ -1258,7 +1258,7 @@ static void read_packed_refs(FILE *f, struct ref_dir *dir)
line.len == PEELED_LINE_LENGTH &&
line.buf[PEELED_LINE_LENGTH - 1] == '\n' &&
!get_sha1_hex(line.buf + 1, sha1)) {
- hashcpy(last->u.value.peeled, sha1);
+ hashcpy(last->u.value.peeled.hash, sha1);
/*
* Regardless of what the file header said,
* we definitely know the value of *this*
@@ -1439,7 +1439,7 @@ static int resolve_gitlink_packed_ref(struct ref_cache *refs,
if (ref == NULL)
return -1;
- hashcpy(sha1, ref->u.value.sha1);
+ hashcpy(sha1, ref->u.value.oid.hash);
return 0;
}
@@ -1526,7 +1526,7 @@ static int resolve_missing_loose_ref(const char *refname,
*/
entry = get_packed_ref(refname);
if (entry) {
- hashcpy(sha1, entry->u.value.sha1);
+ hashcpy(sha1, entry->u.value.oid.hash);
if (flags)
*flags |= REF_ISPACKED;
return 0;
@@ -1756,13 +1756,14 @@ int ref_exists(const char *refname)
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 {
@@ -1836,9 +1837,9 @@ static enum peel_status peel_entry(struct ref_entry *entry, int repeel)
if (entry->flag & REF_KNOWS_PEELED) {
if (repeel) {
entry->flag &= ~REF_KNOWS_PEELED;
- hashclr(entry->u.value.peeled);
+ oidclr(&entry->u.value.peeled);
} else {
- return is_null_sha1(entry->u.value.peeled) ?
+ return is_null_oid(&entry->u.value.peeled) ?
PEEL_NON_TAG : PEEL_PEELED;
}
}
@@ -1847,7 +1848,7 @@ static enum peel_status peel_entry(struct ref_entry *entry, int repeel)
if (entry->flag & REF_ISSYMREF)
return PEEL_IS_SYMREF;
- status = peel_object(entry->u.value.sha1, entry->u.value.peeled);
+ status = peel_object(entry->u.value.oid.hash, entry->u.value.peeled.hash);
if (status == PEEL_PEELED || status == PEEL_NON_TAG)
entry->flag |= REF_KNOWS_PEELED;
return status;
@@ -1862,7 +1863,7 @@ int peel_ref(const char *refname, unsigned char *sha1)
|| !strcmp(current_ref->name, refname))) {
if (peel_entry(current_ref, 0))
return -1;
- hashcpy(sha1, current_ref->u.value.peeled);
+ hashcpy(sha1, current_ref->u.value.peeled.hash);
return 0;
}
@@ -1882,7 +1883,7 @@ int peel_ref(const char *refname, unsigned char *sha1)
if (r) {
if (peel_entry(r, 0))
return -1;
- hashcpy(sha1, r->u.value.peeled);
+ hashcpy(sha1, r->u.value.peeled.hash);
return 0;
}
}
@@ -1897,17 +1898,17 @@ struct warn_if_dangling_data {
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)
@@ -2027,18 +2028,18 @@ static int do_for_each_ref(struct ref_cache *refs, const char *base,
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;
}
@@ -2113,12 +2114,12 @@ int head_ref_namespaced(each_ref_fn fn, void *cb_data)
{
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;
@@ -2218,27 +2219,35 @@ static void unlock_ref(struct ref_lock *lock)
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)
@@ -2381,7 +2390,7 @@ static struct ref_lock *lock_ref_sha1_basic(const char *refname,
}
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;
@@ -2400,7 +2409,7 @@ static struct ref_lock *lock_ref_sha1_basic(const char *refname,
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;
@@ -2420,7 +2429,7 @@ static struct ref_lock *lock_ref_sha1_basic(const char *refname,
* 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;
@@ -2466,7 +2475,11 @@ static struct ref_lock *lock_ref_sha1_basic(const char *refname,
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);
@@ -2496,9 +2509,9 @@ static int write_packed_entry_fn(struct ref_entry *entry, void *cb_data)
if (peel_status != PEEL_PEELED && peel_status != PEEL_NON_TAG)
error("internal error: %s is not a valid packed reference!",
entry->name);
- write_packed_entry(cb_data, entry->name, entry->u.value.sha1,
+ write_packed_entry(cb_data, entry->name, entry->u.value.oid.hash,
peel_status == PEEL_PEELED ?
- entry->u.value.peeled : NULL);
+ entry->u.value.peeled.hash : NULL);
return 0;
}
@@ -2615,24 +2628,24 @@ static int pack_if_possible_fn(struct ref_entry *entry, void *cb_data)
peel_status = peel_entry(entry, 1);
if (peel_status != PEEL_PEELED && peel_status != PEEL_NON_TAG)
die("internal error peeling reference %s (%s)",
- entry->name, sha1_to_hex(entry->u.value.sha1));
+ entry->name, oid_to_hex(&entry->u.value.oid));
packed_entry = find_ref(cb->packed_refs, entry->name);
if (packed_entry) {
/* Overwrite existing packed entry with info from loose entry */
packed_entry->flag = REF_ISPACKED | REF_KNOWS_PEELED;
- hashcpy(packed_entry->u.value.sha1, entry->u.value.sha1);
+ oidcpy(&packed_entry->u.value.oid, &entry->u.value.oid);
} else {
- packed_entry = create_ref_entry(entry->name, entry->u.value.sha1,
+ packed_entry = create_ref_entry(entry->name, entry->u.value.oid.hash,
REF_ISPACKED | REF_KNOWS_PEELED, 0);
add_ref(cb->packed_refs, packed_entry);
}
- hashcpy(packed_entry->u.value.peeled, entry->u.value.peeled);
+ oidcpy(&packed_entry->u.value.peeled, &entry->u.value.peeled);
/* Schedule the loose reference for pruning if requested. */
if ((cb->flags & PACK_REFS_PRUNE)) {
int namelen = strlen(entry->name) + 1;
struct ref_to_prune *n = xcalloc(1, sizeof(*n) + namelen);
- hashcpy(n->sha1, entry->u.value.sha1);
+ hashcpy(n->sha1, entry->u.value.oid.hash);
strcpy(n->name, entry->name);
n->next = cb->ref_to_prune;
cb->ref_to_prune = n;
@@ -2943,7 +2956,7 @@ int rename_ref(const char *oldrefname, const char *newrefname, const char *logms
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)) {
@@ -3198,9 +3211,9 @@ static int commit_ref_update(struct ref_lock *lock,
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;
}
@@ -3224,7 +3237,7 @@ static int commit_ref_update(struct ref_lock *lock,
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);
@@ -3616,11 +3629,12 @@ static int do_for_each_reflog(struct strbuf *name, each_ref_fn fn, void *cb_data
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;
@@ -3910,7 +3924,7 @@ int ref_transaction_commit(struct ref_transaction *transaction,
? 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;
@@ -3921,7 +3935,7 @@ int ref_transaction_commit(struct ref_transaction *transaction,
(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.
@@ -3933,7 +3947,7 @@ int ref_transaction_commit(struct ref_transaction *transaction,
* 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;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 04:01:10 +0000