summaryrefslogtreecommitdiff
path: root/refs.c
diff options
context:
space:
mode:
Diffstat (limited to 'refs.c')
-rw-r--r--refs.c124
1 files changed, 66 insertions, 58 deletions
diff --git a/refs.c b/refs.c
index d7cc0a23a3..996ac27164 100644
--- a/refs.c
+++ b/refs.c
@@ -269,9 +269,10 @@ char *refs_resolve_refdup(struct ref_store *refs,
struct object_id *oid, int *flags)
{
const char *result;
+ int ignore_errno;
result = refs_resolve_ref_unsafe(refs, refname, resolve_flags,
- oid, flags);
+ oid, flags, &ignore_errno);
return xstrdup_or_null(result);
}
@@ -291,20 +292,17 @@ struct ref_filter {
void *cb_data;
};
-int refs_read_ref_full(struct ref_store *refs, const char *refname,
- int resolve_flags, struct object_id *oid, int *flags)
+int read_ref_full(const char *refname, int resolve_flags, struct object_id *oid, int *flags)
{
- if (refs_resolve_ref_unsafe(refs, refname, resolve_flags, oid, flags))
+ int ignore_errno;
+ struct ref_store *refs = get_main_ref_store(the_repository);
+
+ if (refs_resolve_ref_unsafe(refs, refname, resolve_flags,
+ oid, flags, &ignore_errno))
return 0;
return -1;
}
-int read_ref_full(const char *refname, int resolve_flags, struct object_id *oid, int *flags)
-{
- return refs_read_ref_full(get_main_ref_store(the_repository), refname,
- resolve_flags, oid, flags);
-}
-
int read_ref(const char *refname, struct object_id *oid)
{
return read_ref_full(refname, RESOLVE_REF_READING, oid, NULL);
@@ -312,7 +310,9 @@ int read_ref(const char *refname, struct object_id *oid)
int refs_ref_exists(struct ref_store *refs, const char *refname)
{
- return !!refs_resolve_ref_unsafe(refs, refname, RESOLVE_REF_READING, NULL, NULL);
+ int ignore_errno;
+ return !!refs_resolve_ref_unsafe(refs, refname, RESOLVE_REF_READING,
+ NULL, NULL, &ignore_errno);
}
int ref_exists(const char *refname)
@@ -655,13 +655,16 @@ int expand_ref(struct repository *repo, const char *str, int len,
struct object_id oid_from_ref;
struct object_id *this_result;
int flag;
+ struct ref_store *refs = get_main_ref_store(repo);
+ int ignore_errno;
this_result = refs_found ? &oid_from_ref : oid;
strbuf_reset(&fullref);
strbuf_addf(&fullref, *p, len, str);
- r = refs_resolve_ref_unsafe(get_main_ref_store(repo),
- fullref.buf, RESOLVE_REF_READING,
- this_result, &flag);
+ r = refs_resolve_ref_unsafe(refs, fullref.buf,
+ RESOLVE_REF_READING,
+ this_result, &flag,
+ &ignore_errno);
if (r) {
if (!refs_found++)
*ref = xstrdup(r);
@@ -690,12 +693,14 @@ int repo_dwim_log(struct repository *r, const char *str, int len,
for (p = ref_rev_parse_rules; *p; p++) {
struct object_id hash;
const char *ref, *it;
+ int ignore_errno;
strbuf_reset(&path);
strbuf_addf(&path, *p, len, str);
ref = refs_resolve_ref_unsafe(refs, path.buf,
RESOLVE_REF_READING,
- oid ? &hash : NULL, NULL);
+ oid ? &hash : NULL, NULL,
+ &ignore_errno);
if (!ref)
continue;
if (refs_reflog_exists(refs, path.buf))
@@ -1373,32 +1378,14 @@ const char *find_descendant_ref(const char *dirname,
return NULL;
}
-int refs_rename_ref_available(struct ref_store *refs,
- const char *old_refname,
- const char *new_refname)
-{
- struct string_list skip = STRING_LIST_INIT_NODUP;
- struct strbuf err = STRBUF_INIT;
- int ok;
-
- string_list_insert(&skip, old_refname);
- ok = !refs_verify_refname_available(refs, new_refname,
- NULL, &skip, &err);
- if (!ok)
- error("%s", err.buf);
-
- string_list_clear(&skip, 0);
- strbuf_release(&err);
- return ok;
-}
-
int refs_head_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
{
struct object_id oid;
int flag;
+ int ignore_errno;
- if (!refs_read_ref_full(refs, "HEAD", RESOLVE_REF_READING,
- &oid, &flag))
+ if (refs_resolve_ref_unsafe(refs, "HEAD", RESOLVE_REF_READING,
+ &oid, &flag, &ignore_errno))
return fn("HEAD", &oid, flag, cb_data);
return 0;
@@ -1649,7 +1636,8 @@ int for_each_fullref_in_prefixes(const char *namespace,
static int refs_read_special_head(struct ref_store *ref_store,
const char *refname, struct object_id *oid,
- struct strbuf *referent, unsigned int *type)
+ struct strbuf *referent, unsigned int *type,
+ int *failure_errno)
{
struct strbuf full_path = STRBUF_INIT;
struct strbuf content = STRBUF_INIT;
@@ -1659,7 +1647,8 @@ static int refs_read_special_head(struct ref_store *ref_store,
if (strbuf_read_file(&content, full_path.buf, 0) < 0)
goto done;
- result = parse_loose_ref_contents(content.buf, oid, referent, type);
+ result = parse_loose_ref_contents(content.buf, oid, referent, type,
+ failure_errno);
done:
strbuf_release(&full_path);
@@ -1667,30 +1656,33 @@ done:
return result;
}
-int refs_read_raw_ref(struct ref_store *ref_store,
- const char *refname, struct object_id *oid,
- struct strbuf *referent, unsigned int *type)
+int refs_read_raw_ref(struct ref_store *ref_store, const char *refname,
+ struct object_id *oid, struct strbuf *referent,
+ unsigned int *type, int *failure_errno)
{
+ assert(failure_errno);
if (!strcmp(refname, "FETCH_HEAD") || !strcmp(refname, "MERGE_HEAD")) {
return refs_read_special_head(ref_store, refname, oid, referent,
- type);
+ type, failure_errno);
}
return ref_store->be->read_raw_ref(ref_store, refname, oid, referent,
- type, &errno);
+ type, failure_errno);
}
-/* This function needs to return a meaningful errno on failure */
const char *refs_resolve_ref_unsafe(struct ref_store *refs,
const char *refname,
int resolve_flags,
- struct object_id *oid, int *flags)
+ struct object_id *oid,
+ int *flags, int *failure_errno)
{
static struct strbuf sb_refname = STRBUF_INIT;
struct object_id unused_oid;
int unused_flags;
int symref_count;
+ assert(failure_errno);
+
if (!oid)
oid = &unused_oid;
if (!flags)
@@ -1701,7 +1693,7 @@ const char *refs_resolve_ref_unsafe(struct ref_store *refs,
if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) {
if (!(resolve_flags & RESOLVE_REF_ALLOW_BAD_NAME) ||
!refname_is_safe(refname)) {
- errno = EINVAL;
+ *failure_errno = EINVAL;
return NULL;
}
@@ -1719,9 +1711,11 @@ const char *refs_resolve_ref_unsafe(struct ref_store *refs,
for (symref_count = 0; symref_count < SYMREF_MAXDEPTH; symref_count++) {
unsigned int read_flags = 0;
- if (refs_read_raw_ref(refs, refname,
- oid, &sb_refname, &read_flags)) {
+ if (refs_read_raw_ref(refs, refname, oid, &sb_refname,
+ &read_flags, failure_errno)) {
*flags |= read_flags;
+ if (errno)
+ *failure_errno = errno;
/* In reading mode, refs must eventually resolve */
if (resolve_flags & RESOLVE_REF_READING)
@@ -1732,9 +1726,9 @@ const char *refs_resolve_ref_unsafe(struct ref_store *refs,
* may show errors besides ENOENT if there are
* similarly-named refs.
*/
- if (errno != ENOENT &&
- errno != EISDIR &&
- errno != ENOTDIR)
+ if (*failure_errno != ENOENT &&
+ *failure_errno != EISDIR &&
+ *failure_errno != ENOTDIR)
return NULL;
oidclr(oid);
@@ -1761,7 +1755,7 @@ const char *refs_resolve_ref_unsafe(struct ref_store *refs,
if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) {
if (!(resolve_flags & RESOLVE_REF_ALLOW_BAD_NAME) ||
!refname_is_safe(refname)) {
- errno = EINVAL;
+ *failure_errno = EINVAL;
return NULL;
}
@@ -1769,7 +1763,7 @@ const char *refs_resolve_ref_unsafe(struct ref_store *refs,
}
}
- errno = ELOOP;
+ *failure_errno = ELOOP;
return NULL;
}
@@ -1784,8 +1778,10 @@ int refs_init_db(struct strbuf *err)
const char *resolve_ref_unsafe(const char *refname, int resolve_flags,
struct object_id *oid, int *flags)
{
+ int ignore_errno;
+
return refs_resolve_ref_unsafe(get_main_ref_store(the_repository), refname,
- resolve_flags, oid, flags);
+ resolve_flags, oid, flags, &ignore_errno);
}
int resolve_gitlink_ref(const char *submodule, const char *refname,
@@ -1793,14 +1789,15 @@ int resolve_gitlink_ref(const char *submodule, const char *refname,
{
struct ref_store *refs;
int flags;
+ int ignore_errno;
refs = get_submodule_ref_store(submodule);
if (!refs)
return -1;
- if (!refs_resolve_ref_unsafe(refs, refname, 0, oid, &flags) ||
- is_null_oid(oid))
+ if (!refs_resolve_ref_unsafe(refs, refname, 0, oid, &flags,
+ &ignore_errno) || is_null_oid(oid))
return -1;
return 0;
}
@@ -2102,8 +2099,11 @@ static int run_transaction_hook(struct ref_transaction *transaction,
update->refname);
if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
- if (errno != EPIPE)
+ if (errno != EPIPE) {
+ /* Don't leak errno outside this API */
+ errno = 0;
ret = -1;
+ }
break;
}
}
@@ -2238,6 +2238,13 @@ int refs_verify_refname_available(struct ref_store *refs,
strbuf_grow(&dirname, strlen(refname) + 1);
for (slash = strchr(refname, '/'); slash; slash = strchr(slash + 1, '/')) {
+ /*
+ * Just saying "Is a directory" when we e.g. can't
+ * lock some multi-level ref isn't very informative,
+ * the user won't be told *what* is a directory, so
+ * let's not use strerror() below.
+ */
+ int ignore_errno;
/* Expand dirname to the new prefix, not including the trailing slash: */
strbuf_add(&dirname, refname + dirname.len, slash - refname - dirname.len);
@@ -2249,7 +2256,8 @@ int refs_verify_refname_available(struct ref_store *refs,
if (skip && string_list_has_string(skip, dirname.buf))
continue;
- if (!refs_read_raw_ref(refs, dirname.buf, &oid, &referent, &type)) {
+ if (!refs_read_raw_ref(refs, dirname.buf, &oid, &referent,
+ &type, &ignore_errno)) {
strbuf_addf(err, _("'%s' exists; cannot create '%s'"),
dirname.buf, refname);
goto cleanup;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-12 01:10:14 +0000