char *ref_name;
char *orig_ref_name;
struct lock_file *lk;
- unsigned char old_sha1[20];
- int lock_fd;
+ struct object_id old_oid;
};
/*
* 1: End-of-component
* 2: ., look for a preceding . to reject .. in refs
* 3: {, look for a preceding @ to reject @{ in refs
- * 4: A bad character: ASCII control characters, "~", "^", ":" or SP
+ * 4: A bad character: ASCII control characters, and
+ * ":", "?", "[", "\", "^", "~", SP, or TAB
+ * 5: *, reject unless REFNAME_REFSPEC_PATTERN is set
*/
static unsigned char refname_disposition[256] = {
1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
- 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 2, 1,
+ 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 2, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 4,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 4, 0, 4, 0,
*/
#define REF_NEEDS_COMMIT 0x20
+/*
+ * 0x40 is REF_FORCE_CREATE_REFLOG, so skip it if you're adding a
+ * value to ref_update::flags
+ */
+
/*
* Try to read one refname component from the front of refname.
* Return the length of the component found, or -1 if the component is
*
* - any path component of it begins with ".", or
* - it has double dots "..", or
- * - it has ASCII control character, "~", "^", ":" or SP, anywhere, or
- * - it ends with a "/".
- * - it ends with ".lock"
- * - it contains a "\" (backslash)
+ * - it has ASCII control characters, or
+ * - it has ":", "?", "[", "\", "^", "~", SP, or TAB anywhere, or
+ * - it has "*" anywhere unless REFNAME_REFSPEC_PATTERN is set, or
+ * - it ends with a "/", or
+ * - it ends with ".lock", or
+ * - it contains a "@{" portion
*/
-static int check_refname_component(const char *refname, int flags)
+static int check_refname_component(const char *refname, int *flags)
{
const char *cp;
char last = '\0';
break;
case 4:
return -1;
+ case 5:
+ if (!(*flags & REFNAME_REFSPEC_PATTERN))
+ return -1; /* refspec can't be a pattern */
+
+ /*
+ * Unset the pattern flag so that we only accept
+ * a single asterisk for one side of refspec.
+ */
+ *flags &= ~ REFNAME_REFSPEC_PATTERN;
+ break;
}
last = ch;
}
while (1) {
/* We are at the start of a path component. */
- component_len = check_refname_component(refname, flags);
- if (component_len <= 0) {
- if ((flags & REFNAME_REFSPEC_PATTERN) &&
- refname[0] == '*' &&
- (refname[1] == '\0' || refname[1] == '/')) {
- /* Accept one wildcard as a full refname component. */
- flags &= ~REFNAME_REFSPEC_PATTERN;
- component_len = 1;
- } else {
- return -1;
- }
- }
+ component_len = check_refname_component(refname, &flags);
+ if (component_len <= 0)
+ return -1;
+
component_count++;
if (refname[component_len] == '\0')
break;
* 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
* 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;
if (check_name &&
check_refname_format(refname, REFNAME_ALLOW_ONELEVEL))
die("Reference has invalid format: '%s'", refname);
- if (!check_name && !refname_is_safe(refname))
- die("Reference has invalid name: '%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;
/* 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);
{
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;
}
/* 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;
int flag = REF_ISPACKED;
if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) {
+ if (!refname_is_safe(refname))
+ die("packed refname is dangerous: %s", refname);
hashclr(sha1);
flag |= REF_BAD_NAME | REF_ISBROKEN;
}
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*
*/
static struct packed_ref_cache *get_packed_ref_cache(struct ref_cache *refs)
{
- const char *packed_refs_file;
+ char *packed_refs_file;
if (*refs->name)
- packed_refs_file = git_path_submodule(refs->name, "packed-refs");
+ packed_refs_file = git_pathdup_submodule(refs->name, "packed-refs");
else
- packed_refs_file = git_path("packed-refs");
+ packed_refs_file = git_pathdup("packed-refs");
if (refs->packed &&
!stat_validity_check(&refs->packed->validity, packed_refs_file))
fclose(f);
}
}
+ free(packed_refs_file);
return refs->packed;
}
return get_packed_ref_dir(get_packed_ref_cache(refs));
}
-void add_packed_ref(const char *refname, const unsigned char *sha1)
+/*
+ * Add a reference to the in-memory packed reference cache. This may
+ * only be called while the packed-refs file is locked (see
+ * lock_packed_refs()). To actually write the packed-refs file, call
+ * commit_packed_refs().
+ */
+static void add_packed_ref(const char *refname, const unsigned char *sha1)
{
struct packed_ref_cache *packed_ref_cache =
get_packed_ref_cache(&ref_cache);
{
struct ref_cache *refs = dir->ref_cache;
DIR *d;
- const char *path;
struct dirent *de;
int dirnamelen = strlen(dirname);
struct strbuf refname;
+ struct strbuf path = STRBUF_INIT;
+ size_t path_baselen;
if (*refs->name)
- path = git_path_submodule(refs->name, "%s", dirname);
+ strbuf_git_path_submodule(&path, refs->name, "%s", dirname);
else
- path = git_path("%s", dirname);
+ strbuf_git_path(&path, "%s", dirname);
+ path_baselen = path.len;
- d = opendir(path);
- if (!d)
+ d = opendir(path.buf);
+ if (!d) {
+ strbuf_release(&path);
return;
+ }
strbuf_init(&refname, dirnamelen + 257);
strbuf_add(&refname, dirname, dirnamelen);
unsigned char sha1[20];
struct stat st;
int flag;
- const char *refdir;
if (de->d_name[0] == '.')
continue;
if (ends_with(de->d_name, ".lock"))
continue;
strbuf_addstr(&refname, de->d_name);
- refdir = *refs->name
- ? git_path_submodule(refs->name, "%s", refname.buf)
- : git_path("%s", refname.buf);
- if (stat(refdir, &st) < 0) {
+ strbuf_addstr(&path, de->d_name);
+ if (stat(path.buf, &st) < 0) {
; /* silently ignore */
} else if (S_ISDIR(st.st_mode)) {
strbuf_addch(&refname, '/');
if (check_refname_format(refname.buf,
REFNAME_ALLOW_ONELEVEL)) {
+ if (!refname_is_safe(refname.buf))
+ die("loose refname is dangerous: %s", refname.buf);
hashclr(sha1);
flag |= REF_BAD_NAME | REF_ISBROKEN;
}
create_ref_entry(refname.buf, sha1, flag, 0));
}
strbuf_setlen(&refname, dirnamelen);
+ strbuf_setlen(&path, path_baselen);
}
strbuf_release(&refname);
+ strbuf_release(&path);
closedir(d);
}
if (ref == NULL)
return -1;
- hashcpy(sha1, ref->u.value.sha1);
+ hashcpy(sha1, ref->u.value.oid.hash);
return 0;
}
if (recursion > MAXDEPTH || strlen(refname) > MAXREFLEN)
return -1;
path = *refs->name
- ? git_path_submodule(refs->name, "%s", refname)
- : git_path("%s", refname);
+ ? git_pathdup_submodule(refs->name, "%s", refname)
+ : git_pathdup("%s", refname);
fd = open(path, O_RDONLY);
+ free(path);
if (fd < 0)
return resolve_gitlink_packed_ref(refs, refname, sha1);
*/
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;
}
/* This function needs to return a meaningful errno on failure */
-const char *resolve_ref_unsafe(const char *refname, int resolve_flags, unsigned char *sha1, int *flags)
+static const char *resolve_ref_unsafe_1(const char *refname,
+ int resolve_flags,
+ unsigned char *sha1,
+ int *flags,
+ struct strbuf *sb_path)
{
int depth = MAXDEPTH;
ssize_t len;
bad_name = 1;
}
for (;;) {
- char path[PATH_MAX];
+ const char *path;
struct stat st;
char *buf;
int fd;
return NULL;
}
- git_snpath(path, sizeof(path), "%s", refname);
+ strbuf_reset(sb_path);
+ strbuf_git_path(sb_path, "%s", refname);
+ path = sb_path->buf;
/*
* We might have to loop back here to avoid a race
}
}
-char *resolve_refdup(const char *ref, int resolve_flags, unsigned char *sha1, int *flags)
+const char *resolve_ref_unsafe(const char *refname, int resolve_flags,
+ unsigned char *sha1, int *flags)
+{
+ struct strbuf sb_path = STRBUF_INIT;
+ const char *ret = resolve_ref_unsafe_1(refname, resolve_flags,
+ sha1, flags, &sb_path);
+ strbuf_release(&sb_path);
+ return ret;
+}
+
+char *resolve_refdup(const char *refname, int resolve_flags,
+ unsigned char *sha1, int *flags)
{
- return xstrdup_or_null(resolve_ref_unsafe(ref, resolve_flags, sha1, flags));
+ return xstrdup_or_null(resolve_ref_unsafe(refname, resolve_flags,
+ sha1, flags));
}
/* The argument to filter_refs */
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 {
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;
}
}
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;
|| !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;
}
if (r) {
if (peel_entry(r, 0))
return -1;
- hashcpy(sha1, r->u.value.peeled);
+ hashcpy(sha1, r->u.value.peeled.hash);
return 0;
}
}
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;
}
int for_each_replace_ref(each_ref_fn fn, void *cb_data)
{
- return do_for_each_ref(&ref_cache, "refs/replace/", fn, 13, 0, cb_data);
+ return do_for_each_ref(&ref_cache, git_replace_ref_base, fn,
+ strlen(git_replace_ref_base), 0, cb_data);
}
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;
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)
+static int remove_empty_directories(struct strbuf *path)
{
- /* we want to create a file but there is a directory there;
+ /*
+ * we want to create a file but there is a directory there;
* if that is an empty directory (or a directory that contains
* only empty directories), remove them.
*/
- struct strbuf path;
- int result, save_errno;
-
- strbuf_init(&path, 20);
- strbuf_addstr(&path, file);
-
- result = remove_dir_recursively(&path, REMOVE_DIR_EMPTY_ONLY);
- save_errno = errno;
-
- strbuf_release(&path);
- errno = save_errno;
-
- return result;
+ return remove_dir_recursively(path, REMOVE_DIR_EMPTY_ONLY);
}
/*
unsigned int flags, int *type_p,
struct strbuf *err)
{
- char *ref_file;
+ struct strbuf ref_file = STRBUF_INIT;
+ struct strbuf orig_ref_file = STRBUF_INIT;
const char *orig_refname = refname;
struct ref_lock *lock;
int last_errno = 0;
assert(err);
lock = xcalloc(1, sizeof(struct ref_lock));
- lock->lock_fd = -1;
if (mustexist)
resolve_flags |= RESOLVE_REF_READING;
}
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
+ /*
+ * we are trying to lock foo but we used to
* have foo/bar which now does not exist;
* it is normal for the empty directory 'foo'
* to remain.
*/
- ref_file = git_path("%s", orig_refname);
- if (remove_empty_directories(ref_file)) {
+ strbuf_git_path(&orig_ref_file, "%s", orig_refname);
+ if (remove_empty_directories(&orig_ref_file)) {
last_errno = errno;
-
if (!verify_refname_available(orig_refname, extras, skip,
get_loose_refs(&ref_cache), err))
strbuf_addf(err, "there are still refs under '%s'",
orig_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;
* 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;
}
lock->ref_name = xstrdup(refname);
lock->orig_ref_name = xstrdup(orig_refname);
- ref_file = git_path("%s", refname);
+ strbuf_git_path(&ref_file, "%s", refname);
retry:
- switch (safe_create_leading_directories(ref_file)) {
+ switch (safe_create_leading_directories_const(ref_file.buf)) {
case SCLD_OK:
break; /* success */
case SCLD_VANISHED:
/* fall through */
default:
last_errno = errno;
- strbuf_addf(err, "unable to create directory for %s", ref_file);
+ strbuf_addf(err, "unable to create directory for %s",
+ ref_file.buf);
goto error_return;
}
- lock->lock_fd = hold_lock_file_for_update(lock->lk, ref_file, lflags);
- if (lock->lock_fd < 0) {
+ if (hold_lock_file_for_update(lock->lk, ref_file.buf, lflags) < 0) {
last_errno = errno;
if (errno == ENOENT && --attempts_remaining > 0)
/*
*/
goto retry;
else {
- unable_to_lock_message(ref_file, errno, err);
+ unable_to_lock_message(ref_file.buf, errno, err);
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;
+ }
+ goto out;
error_return:
unlock_ref(lock);
+ lock = NULL;
+
+ out:
+ strbuf_release(&ref_file);
+ strbuf_release(&orig_ref_file);
errno = last_errno;
- return NULL;
+ return lock;
}
/*
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;
}
-/* This should return a meaningful errno on failure */
-int lock_packed_refs(int flags)
+/*
+ * Lock the packed-refs file for writing. Flags is passed to
+ * hold_lock_file_for_update(). Return 0 on success. On errors, set
+ * errno appropriately and return a nonzero value.
+ */
+static int lock_packed_refs(int flags)
{
+ static int timeout_configured = 0;
+ static int timeout_value = 1000;
+
struct packed_ref_cache *packed_ref_cache;
- if (hold_lock_file_for_update(&packlock, git_path("packed-refs"), flags) < 0)
+ if (!timeout_configured) {
+ git_config_get_int("core.packedrefstimeout", &timeout_value);
+ timeout_configured = 1;
+ }
+
+ if (hold_lock_file_for_update_timeout(
+ &packlock, git_path("packed-refs"),
+ flags, timeout_value) < 0)
return -1;
/*
* Get the current packed-refs while holding the lock. If the
}
/*
- * Commit the packed refs changes.
- * On error we must make sure that errno contains a meaningful value.
+ * Write the current version of the packed refs cache from memory to
+ * disk. The packed-refs file must already be locked for writing (see
+ * lock_packed_refs()). Return zero on success. On errors, set errno
+ * and return a nonzero value
*/
-int commit_packed_refs(void)
+static int commit_packed_refs(void)
{
struct packed_ref_cache *packed_ref_cache =
get_packed_ref_cache(&ref_cache);
return error;
}
-void rollback_packed_refs(void)
+/*
+ * Rollback the lockfile for the packed-refs file, and discard the
+ * in-memory packed reference cache. (The packed-refs file will be
+ * read anew if it is needed again after this function is called.)
+ */
+static void rollback_packed_refs(void)
{
struct packed_ref_cache *packed_ref_cache =
get_packed_ref_cache(&ref_cache);
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;
return 0;
}
-int repack_without_refs(struct string_list *refnames, struct strbuf *err)
+/*
+ * Rewrite the packed-refs file, omitting any refs listed in
+ * 'refnames'. On error, leave packed-refs unchanged, write an error
+ * message to 'err', and return a nonzero value.
+ *
+ * The refs in 'refnames' needn't be sorted. `err` must not be NULL.
+ */
+static int repack_without_refs(struct string_list *refnames, struct strbuf *err)
{
struct ref_dir *packed;
struct string_list_item *refname;
return 0;
}
-int delete_ref(const char *refname, const unsigned char *sha1, unsigned int flags)
+int delete_ref(const char *refname, const unsigned char *old_sha1,
+ unsigned int flags)
{
struct ref_transaction *transaction;
struct strbuf err = STRBUF_INIT;
transaction = ref_transaction_begin(&err);
if (!transaction ||
- ref_transaction_delete(transaction, refname,
- (sha1 && !is_null_sha1(sha1)) ? sha1 : NULL,
+ ref_transaction_delete(transaction, refname, old_sha1,
flags, NULL, &err) ||
ref_transaction_commit(transaction, &err)) {
error("%s", err.buf);
return 0;
}
+int delete_refs(struct string_list *refnames)
+{
+ struct strbuf err = STRBUF_INIT;
+ int i, result = 0;
+
+ if (!refnames->nr)
+ return 0;
+
+ result = repack_without_refs(refnames, &err);
+ if (result) {
+ /*
+ * If we failed to rewrite the packed-refs file, then
+ * it is unsafe to try to remove loose refs, because
+ * doing so might expose an obsolete packed value for
+ * a reference that might even point at an object that
+ * has been garbage collected.
+ */
+ if (refnames->nr == 1)
+ error(_("could not delete reference %s: %s"),
+ refnames->items[0].string, err.buf);
+ else
+ error(_("could not delete references: %s"), err.buf);
+
+ goto out;
+ }
+
+ for (i = 0; i < refnames->nr; i++) {
+ const char *refname = refnames->items[i].string;
+
+ if (delete_ref(refname, NULL, 0))
+ result |= error(_("could not remove reference %s"), refname);
+ }
+
+out:
+ strbuf_release(&err);
+ return result;
+}
+
/*
* People using contrib's git-new-workdir have .git/logs/refs ->
* /some/other/path/.git/logs/refs, and that may live on another device.
static int rename_tmp_log(const char *newrefname)
{
int attempts_remaining = 4;
+ struct strbuf path = STRBUF_INIT;
+ int ret = -1;
retry:
- switch (safe_create_leading_directories(git_path("logs/%s", newrefname))) {
+ strbuf_reset(&path);
+ strbuf_git_path(&path, "logs/%s", newrefname);
+ switch (safe_create_leading_directories_const(path.buf)) {
case SCLD_OK:
break; /* success */
case SCLD_VANISHED:
/* fall through */
default:
error("unable to create directory for %s", newrefname);
- return -1;
+ goto out;
}
- if (rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", newrefname))) {
+ if (rename(git_path(TMP_RENAMED_LOG), path.buf)) {
if ((errno==EISDIR || errno==ENOTDIR) && --attempts_remaining > 0) {
/*
* rename(a, b) when b is an existing
* directory ought to result in ISDIR, but
* Solaris 5.8 gives ENOTDIR. Sheesh.
*/
- if (remove_empty_directories(git_path("logs/%s", newrefname))) {
+ if (remove_empty_directories(&path)) {
error("Directory not empty: logs/%s", newrefname);
- return -1;
+ goto out;
}
goto retry;
} else if (errno == ENOENT && --attempts_remaining > 0) {
} else {
error("unable to move logfile "TMP_RENAMED_LOG" to logs/%s: %s",
newrefname, strerror(errno));
- return -1;
+ goto out;
}
}
- return 0;
+ ret = 0;
+out:
+ strbuf_release(&path);
+ return ret;
}
static int rename_ref_available(const char *oldname, const char *newname)
return ret;
}
-static int write_ref_to_lockfile(struct ref_lock *lock, const unsigned char *sha1);
+static int write_ref_to_lockfile(struct ref_lock *lock,
+ const unsigned char *sha1, struct strbuf *err);
static int commit_ref_update(struct ref_lock *lock,
- const unsigned char *sha1, const char *logmsg);
+ const unsigned char *sha1, const char *logmsg,
+ int flags, struct strbuf *err);
int rename_ref(const char *oldrefname, const char *newrefname, const char *logmsg)
{
if (!read_ref_full(newrefname, RESOLVE_REF_READING, sha1, NULL) &&
delete_ref(newrefname, sha1, REF_NODEREF)) {
if (errno==EISDIR) {
- if (remove_empty_directories(git_path("%s", newrefname))) {
+ struct strbuf path = STRBUF_INIT;
+ int result;
+
+ strbuf_git_path(&path, "%s", newrefname);
+ result = remove_empty_directories(&path);
+ strbuf_release(&path);
+
+ if (result) {
error("Directory not empty: %s", newrefname);
goto rollback;
}
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)) {
- error("unable to write current sha1 into %s", newrefname);
+ if (write_ref_to_lockfile(lock, orig_sha1, &err) ||
+ commit_ref_update(lock, orig_sha1, logmsg, 0, &err)) {
+ error("unable to write current sha1 into %s: %s", newrefname, err.buf);
+ strbuf_release(&err);
goto rollback;
}
flag = log_all_ref_updates;
log_all_ref_updates = 0;
- if (write_ref_to_lockfile(lock, orig_sha1) ||
- commit_ref_update(lock, orig_sha1, NULL))
- error("unable to write current sha1 into %s", oldrefname);
+ if (write_ref_to_lockfile(lock, orig_sha1, &err) ||
+ commit_ref_update(lock, orig_sha1, NULL, 0, &err)) {
+ error("unable to write current sha1 into %s: %s", oldrefname, err.buf);
+ strbuf_release(&err);
+ }
log_all_ref_updates = flag;
rollbacklog:
{
if (close_lock_file(lock->lk))
return -1;
- lock->lock_fd = -1;
return 0;
}
{
if (commit_lock_file(lock->lk))
return -1;
- lock->lock_fd = -1;
return 0;
}
return cp - buf;
}
-/* This function must set a meaningful errno on failure */
-int log_ref_setup(const char *refname, char *logfile, int bufsize)
+static int should_autocreate_reflog(const char *refname)
+{
+ if (!log_all_ref_updates)
+ return 0;
+ return starts_with(refname, "refs/heads/") ||
+ starts_with(refname, "refs/remotes/") ||
+ starts_with(refname, "refs/notes/") ||
+ !strcmp(refname, "HEAD");
+}
+
+/*
+ * Create a reflog for a ref. If force_create = 0, the reflog will
+ * only be created for certain refs (those for which
+ * should_autocreate_reflog returns non-zero. Otherwise, create it
+ * regardless of the ref name. Fill in *err and return -1 on failure.
+ */
+static int log_ref_setup(const char *refname, struct strbuf *logfile, struct strbuf *err, int force_create)
{
int logfd, oflags = O_APPEND | O_WRONLY;
- git_snpath(logfile, bufsize, "logs/%s", refname);
- if (log_all_ref_updates &&
- (starts_with(refname, "refs/heads/") ||
- starts_with(refname, "refs/remotes/") ||
- starts_with(refname, "refs/notes/") ||
- !strcmp(refname, "HEAD"))) {
- if (safe_create_leading_directories(logfile) < 0) {
- int save_errno = errno;
- error("unable to create directory for %s", logfile);
- errno = save_errno;
+ strbuf_git_path(logfile, "logs/%s", refname);
+ if (force_create || should_autocreate_reflog(refname)) {
+ if (safe_create_leading_directories(logfile->buf) < 0) {
+ strbuf_addf(err, "unable to create directory for %s: "
+ "%s", logfile->buf, strerror(errno));
return -1;
}
oflags |= O_CREAT;
}
- logfd = open(logfile, oflags, 0666);
+ logfd = open(logfile->buf, oflags, 0666);
if (logfd < 0) {
if (!(oflags & O_CREAT) && (errno == ENOENT || errno == EISDIR))
return 0;
if (errno == EISDIR) {
if (remove_empty_directories(logfile)) {
- int save_errno = errno;
- error("There are still logs under '%s'",
- logfile);
- errno = save_errno;
+ strbuf_addf(err, "There are still logs under "
+ "'%s'", logfile->buf);
return -1;
}
- logfd = open(logfile, oflags, 0666);
+ logfd = open(logfile->buf, oflags, 0666);
}
if (logfd < 0) {
- int save_errno = errno;
- error("Unable to append to %s: %s", logfile,
- strerror(errno));
- errno = save_errno;
+ strbuf_addf(err, "unable to append to %s: %s",
+ logfile->buf, strerror(errno));
return -1;
}
}
- adjust_shared_perm(logfile);
+ adjust_shared_perm(logfile->buf);
close(logfd);
return 0;
}
+
+int safe_create_reflog(const char *refname, int force_create, struct strbuf *err)
+{
+ int ret;
+ struct strbuf sb = STRBUF_INIT;
+
+ ret = log_ref_setup(refname, &sb, err, force_create);
+ strbuf_release(&sb);
+ return ret;
+}
+
static int log_ref_write_fd(int fd, const unsigned char *old_sha1,
const unsigned char *new_sha1,
const char *committer, const char *msg)
return 0;
}
-static int log_ref_write(const char *refname, const unsigned char *old_sha1,
- const unsigned char *new_sha1, const char *msg)
+static int log_ref_write_1(const char *refname, const unsigned char *old_sha1,
+ const unsigned char *new_sha1, const char *msg,
+ struct strbuf *logfile, int flags,
+ struct strbuf *err)
{
int logfd, result, oflags = O_APPEND | O_WRONLY;
- char log_file[PATH_MAX];
if (log_all_ref_updates < 0)
log_all_ref_updates = !is_bare_repository();
- result = log_ref_setup(refname, log_file, sizeof(log_file));
+ result = log_ref_setup(refname, logfile, err, flags & REF_FORCE_CREATE_REFLOG);
+
if (result)
return result;
- logfd = open(log_file, oflags);
+ logfd = open(logfile->buf, oflags);
if (logfd < 0)
return 0;
result = log_ref_write_fd(logfd, old_sha1, new_sha1,
git_committer_info(0), msg);
if (result) {
- int save_errno = errno;
+ strbuf_addf(err, "unable to append to %s: %s", logfile->buf,
+ strerror(errno));
close(logfd);
- error("Unable to append to %s", log_file);
- errno = save_errno;
return -1;
}
if (close(logfd)) {
- int save_errno = errno;
- error("Unable to append to %s", log_file);
- errno = save_errno;
+ strbuf_addf(err, "unable to append to %s: %s", logfile->buf,
+ strerror(errno));
return -1;
}
return 0;
}
+static int log_ref_write(const char *refname, const unsigned char *old_sha1,
+ const unsigned char *new_sha1, const char *msg,
+ int flags, struct strbuf *err)
+{
+ struct strbuf sb = STRBUF_INIT;
+ int ret = log_ref_write_1(refname, old_sha1, new_sha1, msg, &sb, flags,
+ err);
+ strbuf_release(&sb);
+ return ret;
+}
+
int is_branch(const char *refname)
{
return !strcmp(refname, "HEAD") || starts_with(refname, "refs/heads/");
/*
* Write sha1 into the open lockfile, then close the lockfile. On
- * errors, rollback the lockfile and set errno to reflect the problem.
+ * errors, rollback the lockfile, fill in *err and
+ * return -1.
*/
static int write_ref_to_lockfile(struct ref_lock *lock,
- const unsigned char *sha1)
+ const unsigned char *sha1, struct strbuf *err)
{
static char term = '\n';
struct object *o;
o = parse_object(sha1);
if (!o) {
- error("Trying to write ref %s with nonexistent object %s",
- lock->ref_name, sha1_to_hex(sha1));
+ strbuf_addf(err,
+ "Trying to write ref %s with nonexistent object %s",
+ lock->ref_name, sha1_to_hex(sha1));
unlock_ref(lock);
- errno = EINVAL;
return -1;
}
if (o->type != OBJ_COMMIT && is_branch(lock->ref_name)) {
- error("Trying to write non-commit object %s to branch %s",
- sha1_to_hex(sha1), lock->ref_name);
+ strbuf_addf(err,
+ "Trying to write non-commit object %s to branch %s",
+ sha1_to_hex(sha1), lock->ref_name);
unlock_ref(lock);
- errno = EINVAL;
return -1;
}
- if (write_in_full(lock->lock_fd, sha1_to_hex(sha1), 40) != 40 ||
- write_in_full(lock->lock_fd, &term, 1) != 1 ||
+ if (write_in_full(lock->lk->fd, sha1_to_hex(sha1), 40) != 40 ||
+ write_in_full(lock->lk->fd, &term, 1) != 1 ||
close_ref(lock) < 0) {
- int save_errno = errno;
- error("Couldn't write %s", lock->lk->filename.buf);
+ strbuf_addf(err,
+ "Couldn't write %s", lock->lk->filename.buf);
unlock_ref(lock);
- errno = save_errno;
return -1;
}
return 0;
* necessary, using the specified lockmsg (which can be NULL).
*/
static int commit_ref_update(struct ref_lock *lock,
- const unsigned char *sha1, const char *logmsg)
+ const unsigned char *sha1, const char *logmsg,
+ int flags, struct strbuf *err)
{
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, flags, err) < 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, flags, err) < 0)) {
+ char *old_msg = strbuf_detach(err, NULL);
+ strbuf_addf(err, "Cannot update the ref '%s': %s",
+ lock->ref_name, old_msg);
+ free(old_msg);
unlock_ref(lock);
return -1;
}
head_ref = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
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);
+ !strcmp(head_ref, lock->ref_name)) {
+ struct strbuf log_err = STRBUF_INIT;
+ if (log_ref_write("HEAD", lock->old_oid.hash, sha1,
+ logmsg, 0, &log_err)) {
+ error("%s", log_err.buf);
+ strbuf_release(&log_err);
+ }
+ }
}
if (commit_ref(lock)) {
error("Couldn't set %s", lock->ref_name);
unlock_ref(lock);
return -1;
}
+
unlock_ref(lock);
return 0;
}
int create_symref(const char *ref_target, const char *refs_heads_master,
const char *logmsg)
{
- const char *lockpath;
+ char *lockpath = NULL;
char ref[1000];
int fd, len, written;
char *git_HEAD = git_pathdup("%s", ref_target);
unsigned char old_sha1[20], new_sha1[20];
+ struct strbuf err = STRBUF_INIT;
if (logmsg && read_ref(ref_target, old_sha1))
hashclr(old_sha1);
error("refname too long: %s", refs_heads_master);
goto error_free_return;
}
- lockpath = mkpath("%s.lock", git_HEAD);
+ lockpath = mkpathdup("%s.lock", git_HEAD);
fd = open(lockpath, O_CREAT | O_EXCL | O_WRONLY, 0666);
if (fd < 0) {
error("Unable to open %s for writing", lockpath);
error_unlink_return:
unlink_or_warn(lockpath);
error_free_return:
+ free(lockpath);
free(git_HEAD);
return -1;
}
+ free(lockpath);
#ifndef NO_SYMLINK_HEAD
done:
#endif
- if (logmsg && !read_ref(refs_heads_master, new_sha1))
- log_ref_write(ref_target, old_sha1, new_sha1, logmsg);
+ if (logmsg && !read_ref(refs_heads_master, new_sha1) &&
+ log_ref_write(ref_target, old_sha1, new_sha1, logmsg, 0, &err)) {
+ error("%s", err.buf);
+ strbuf_release(&err);
+ }
free(git_HEAD);
return 0;
hashcpy(cb->sha1, nsha1);
if (hashcmp(cb->osha1, nsha1))
warning("Log for ref %s has gap after %s.",
- cb->refname, show_date(cb->date, cb->tz, DATE_RFC2822));
+ cb->refname, show_date(cb->date, cb->tz, DATE_MODE(RFC2822)));
}
else if (cb->date == cb->at_time)
hashcpy(cb->sha1, nsha1);
else if (hashcmp(nsha1, cb->sha1))
warning("Log for ref %s unexpectedly ended on %s.",
cb->refname, show_date(cb->date, cb->tz,
- DATE_RFC2822));
+ DATE_MODE(RFC2822)));
hashcpy(cb->osha1, osha1);
hashcpy(cb->nsha1, nsha1);
cb->found_it = 1;
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.
*/
} else if (write_ref_to_lockfile(update->lock,
- update->new_sha1)) {
+ update->new_sha1,
+ err)) {
+ char *write_err = strbuf_detach(err, NULL);
+
/*
* The lock was freed upon failure of
* write_ref_to_lockfile():
*/
update->lock = NULL;
- strbuf_addf(err, "Cannot update the ref '%s'.",
- update->refname);
+ strbuf_addf(err,
+ "cannot update the ref '%s': %s",
+ update->refname, write_err);
+ free(write_err);
ret = TRANSACTION_GENERIC_ERROR;
goto cleanup;
} else {
if (update->flags & REF_NEEDS_COMMIT) {
if (commit_ref_update(update->lock,
- update->new_sha1, update->msg)) {
+ update->new_sha1, update->msg,
+ update->flags, err)) {
/* freed by commit_ref_update(): */
update->lock = NULL;
- strbuf_addf(err, "Cannot update the ref '%s'.",
- update->refname);
ret = TRANSACTION_GENERIC_ERROR;
goto cleanup;
} else {
return ret;
}
+static int ref_present(const char *refname,
+ const struct object_id *oid, int flags, void *cb_data)
+{
+ struct string_list *affected_refnames = cb_data;
+
+ return string_list_has_string(affected_refnames, 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;
+ struct string_list affected_refnames = STRING_LIST_INIT_NODUP;
+
+ assert(err);
+
+ if (transaction->state != REF_TRANSACTION_OPEN)
+ die("BUG: commit called for transaction that is not open");
+
+ /* Fail if a refname appears more than once in the transaction: */
+ for (i = 0; i < n; i++)
+ string_list_append(&affected_refnames, updates[i]->refname);
+ string_list_sort(&affected_refnames);
+ if (ref_update_reject_duplicates(&affected_refnames, err)) {
+ ret = TRANSACTION_GENERIC_ERROR;
+ goto cleanup;
+ }
+
+ /*
+ * It's really undefined to call this function in an active
+ * repository or when there are existing references: we are
+ * only locking and changing packed-refs, so (1) any
+ * simultaneous processes might try to change a reference at
+ * the same time we do, and (2) any existing loose versions of
+ * the references that we are setting would have precedence
+ * over our values. But some remote helpers create the remote
+ * "HEAD" and "master" branches before calling this function,
+ * so here we really only check that none of the references
+ * that we are creating already exists.
+ */
+ if (for_each_rawref(ref_present, &affected_refnames))
+ die("BUG: initial ref transaction called with existing refs");
+
+ for (i = 0; i < n; i++) {
+ struct ref_update *update = updates[i];
+
+ if ((update->flags & REF_HAVE_OLD) &&
+ !is_null_sha1(update->old_sha1))
+ 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)) {
+ ret = TRANSACTION_NAME_CONFLICT;
+ goto cleanup;
+ }
+ }
+
+ if (lock_packed_refs(0)) {
+ strbuf_addf(err, "unable to lock packed-refs file: %s",
+ strerror(errno));
+ ret = TRANSACTION_GENERIC_ERROR;
+ goto cleanup;
+ }
+
+ for (i = 0; i < n; i++) {
+ struct ref_update *update = updates[i];
+
+ if ((update->flags & REF_HAVE_NEW) &&
+ !is_null_sha1(update->new_sha1))
+ add_packed_ref(update->refname, update->new_sha1);
+ }
+
+ if (commit_packed_refs()) {
+ strbuf_addf(err, "unable to commit packed-refs file: %s",
+ strerror(errno));
+ ret = TRANSACTION_GENERIC_ERROR;
+ goto cleanup;
+ }
+
+cleanup:
+ transaction->state = REF_TRANSACTION_CLOSED;
+ string_list_clear(&affected_refnames, 0);
+ return ret;
+}
+
char *shorten_unambiguous_ref(const char *refname, int strict)
{
int i;
status |= error("couldn't write %s: %s", log_file,
strerror(errno));
} else if (update &&
- (write_in_full(lock->lock_fd,
+ (write_in_full(lock->lk->fd,
sha1_to_hex(cb.last_kept_sha1), 40) != 40 ||
- write_str_in_full(lock->lock_fd, "\n") != 1 ||
+ write_str_in_full(lock->lk->fd, "\n") != 1 ||
close_ref(lock) < 0)) {
status |= error("couldn't write %s",
lock->lk->filename.buf);