int cmd_check_ref_format(int argc, const char **argv, const char *prefix)
{
if (argc == 2 && !strcmp(argv[1], "-h"))
usage(builtin_check_ref_format_usage);
if (argc == 3 && !strcmp(argv[1], "--branch")) {
struct strbuf sb = STRBUF_INIT;
if (strbuf_check_branch_ref(&sb, argv[2]))
die("'%s' is not a valid branch name", argv[2]);
printf("%s\n", sb.buf + 11);
exit(0);
}
if (argc == 3 && !strcmp(argv[1], "--print")) {
char *refname = xmalloc(strlen(argv[2]) + 1);
if (check_ref_format(argv[2]))
exit(1);
collapse_slashes(refname, argv[2]);
printf("%s\n", refname);
exit(0);
}
if (argc != 2)
usage(builtin_check_ref_format_usage);
return !!check_ref_format(argv[1]);
}
static void verify_remote_names(int nr_heads, const char **heads)
{
int i;
for (i = 0; i < nr_heads; i++) {
const char *local = heads[i];
const char *remote = strrchr(heads[i], ':');
if (*local == '+')
local++;
/* A matching refspec is okay. */
if (remote == local && remote[1] == '\0')
continue;
remote = remote ? (remote + 1) : local;
switch (check_ref_format(remote)) {
case 0: /* ok */
case CHECK_REF_FORMAT_ONELEVEL:
/* ok but a single level -- that is fine for
* a match pattern.
*/
case CHECK_REF_FORMAT_WILDCARD:
/* ok but ends with a pattern-match character */
continue;
}
die("remote part of refspec is not a valid name in %s",
heads[i]);
}
}
static int check_ref(const char *name, int len, unsigned int flags)
{
if (!flags)
return 1;
if (len < 5 || memcmp(name, "refs/", 5))
return 0;
/* Skip the "refs/" part */
name += 5;
len -= 5;
/* REF_NORMAL means that we don't want the magic fake tag refs */
if ((flags & REF_NORMAL) && check_ref_format(name) < 0)
return 0;
/* REF_HEADS means that we want regular branch heads */
if ((flags & REF_HEADS) && !memcmp(name, "heads/", 6))
return 1;
/* REF_TAGS means that we want tags */
if ((flags & REF_TAGS) && !memcmp(name, "tags/", 5))
return 1;
/* All type bits clear means that we are ok with anything */
return !(flags & ~REF_NORMAL);
}
struct ref_lock *lock_ref_sha1(const char *ref, const unsigned char *old_sha1)
{
char refpath[PATH_MAX];
if (check_ref_format(ref))
return NULL;
strcpy(refpath, mkpath("refs/%s", ref));
return lock_ref_sha1_basic(refpath, old_sha1, 0, NULL);
}
static void filter_refs(struct ref **refs, int nr_match, char **match)
{
struct ref **return_refs;
struct ref *newlist = NULL;
struct ref **newtail = &newlist;
struct ref *ref, *next;
struct ref *fastarray[32];
if (nr_match && !args.fetch_all) {
if (ARRAY_SIZE(fastarray) < nr_match)
return_refs = xcalloc(nr_match, sizeof(struct ref *));
else {
return_refs = fastarray;
memset(return_refs, 0, sizeof(struct ref *) * nr_match);
}
}
else
return_refs = NULL;
for (ref = *refs; ref; ref = next) {
next = ref->next;
if (!memcmp(ref->name, "refs/", 5) &&
check_ref_format(ref->name + 5))
; /* trash */
else if (args.fetch_all &&
(!args.depth || prefixcmp(ref->name, "refs/tags/") )) {
*newtail = ref;
ref->next = NULL;
newtail = &ref->next;
continue;
}
else {
int order = path_match(ref->name, nr_match, match);
if (order) {
return_refs[order-1] = ref;
continue; /* we will link it later */
}
}
free(ref);
}
if (!args.fetch_all) {
int i;
for (i = 0; i < nr_match; i++) {
ref = return_refs[i];
if (ref) {
*newtail = ref;
ref->next = NULL;
newtail = &ref->next;
}
}
if (return_refs != fastarray)
free(return_refs);
}
*refs = newlist;
}
struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1, int flags)
{
switch (check_ref_format(ref)) {
default:
return NULL;
case 0:
case CHECK_REF_FORMAT_ONELEVEL:
return lock_ref_sha1_basic(ref, old_sha1, flags, NULL);
}
}
static void rename_branch(const char *oldname, const char *newname, int force)
{
struct strbuf oldref = STRBUF_INIT, newref = STRBUF_INIT, logmsg = STRBUF_INIT;
unsigned char sha1[20];
struct strbuf oldsection = STRBUF_INIT, newsection = STRBUF_INIT;
if (!oldname)
die("cannot rename the current branch while not on any.");
strbuf_addf(&oldref, "refs/heads/%s", oldname);
if (check_ref_format(oldref.buf))
die("Invalid branch name: %s", oldref.buf);
strbuf_addf(&newref, "refs/heads/%s", newname);
if (check_ref_format(newref.buf))
die("Invalid branch name: %s", newref.buf);
if (resolve_ref(newref.buf, sha1, 1, NULL) && !force)
die("A branch named '%s' already exists.", newname);
strbuf_addf(&logmsg, "Branch: renamed %s to %s",
oldref.buf, newref.buf);
if (rename_ref(oldref.buf, newref.buf, logmsg.buf))
die("Branch rename failed");
strbuf_release(&logmsg);
/* no need to pass logmsg here as HEAD didn't really move */
if (!strcmp(oldname, head) && create_symref("HEAD", newref.buf, NULL))
die("Branch renamed to %s, but HEAD is not updated!", newname);
strbuf_addf(&oldsection, "branch.%s", oldref.buf + 11);
strbuf_release(&oldref);
strbuf_addf(&newsection, "branch.%s", newref.buf + 11);
strbuf_release(&newref);
if (git_config_rename_section(oldsection.buf, newsection.buf) < 0)
die("Branch is renamed, but update of config-file failed");
strbuf_release(&oldsection);
strbuf_release(&newsection);
}
/*
* We need to make sure the tracking branches are well formed, but a
* wildcard refspec in "struct refspec" must have a trailing slash. We
* temporarily drop the trailing '/' while calling check_ref_format(),
* and put it back. The caller knows that a CHECK_REF_FORMAT_ONELEVEL
* error return is Ok for a wildcard refspec.
*/
static int verify_refname(char *name, int is_glob)
{
int result, len = -1;
if (is_glob) {
len = strlen(name);
assert(name[len - 1] == '/');
name[len - 1] = '\0';
}
result = check_ref_format(name);
if (is_glob)
name[len - 1] = '/';
return result;
}
static int interpret_target(struct walker *walker, char *target, unsigned char *sha1)
{
if (!get_sha1_hex(target, sha1))
return 0;
if (!check_ref_format(target)) {
struct ref *ref = alloc_ref(target);
if (!walker->fetch_ref(walker, ref)) {
hashcpy(sha1, ref->old_sha1);
free(ref);
return 0;
}
free(ref);
}
return -1;
}
int get_fetch_map(const struct ref *remote_refs,
const struct refspec *refspec,
struct ref ***tail,
int missing_ok)
{
struct ref *ref_map, **rmp;
if (refspec->pattern) {
ref_map = get_expanded_map(remote_refs, refspec);
} else {
const char *name = refspec->src[0] ? refspec->src : "HEAD";
ref_map = get_remote_ref(remote_refs, name);
if (!missing_ok && !ref_map)
die("Couldn't find remote ref %s", name);
if (ref_map) {
ref_map->peer_ref = get_local_ref(refspec->dst);
if (ref_map->peer_ref && refspec->force)
ref_map->peer_ref->force = 1;
}
}
for (rmp = &ref_map; *rmp; ) {
if ((*rmp)->peer_ref) {
int st = check_ref_format((*rmp)->peer_ref->name + 5);
if (st && st != CHECK_REF_FORMAT_ONELEVEL) {
struct ref *ignore = *rmp;
error("* Ignoring funny ref '%s' locally",
(*rmp)->peer_ref->name);
*rmp = (*rmp)->next;
free(ignore->peer_ref);
free(ignore);
continue;
}
}
rmp = &((*rmp)->next);
}
if (ref_map)
tail_link_ref(ref_map, tail);
return 0;
}
static const char *update(struct command *cmd)
{
const char *name = cmd->ref_name;
unsigned char *old_sha1 = cmd->old_sha1;
unsigned char *new_sha1 = cmd->new_sha1;
struct ref_lock *lock;
/* only refs/... are allowed */
if (prefixcmp(name, "refs/") || check_ref_format(name + 5)) {
error("refusing to create funny ref '%s' remotely", name);
return "funny refname";
}
if (is_ref_checked_out(name)) {
switch (deny_current_branch) {
case DENY_IGNORE:
break;
case DENY_UNCONFIGURED:
case DENY_WARN:
warning("updating the current branch");
if (deny_current_branch == DENY_UNCONFIGURED)
warn_unconfigured_deny();
break;
case DENY_REFUSE:
error("refusing to update checked out branch: %s", name);
return "branch is currently checked out";
}
}
if (!is_null_sha1(new_sha1) && !has_sha1_file(new_sha1)) {
error("unpack should have generated %s, "
"but I can't find it!", sha1_to_hex(new_sha1));
return "bad pack";
}
if (!is_null_sha1(old_sha1) && is_null_sha1(new_sha1)) {
if (deny_deletes && !prefixcmp(name, "refs/heads/")) {
error("denying ref deletion for %s", name);
return "deletion prohibited";
}
if (!strcmp(name, head_name)) {
switch (deny_delete_current) {
case DENY_IGNORE:
break;
case DENY_WARN:
case DENY_UNCONFIGURED:
if (deny_delete_current == DENY_UNCONFIGURED)
warn_unconfigured_deny_delete_current();
warning("deleting the current branch");
break;
case DENY_REFUSE:
error("refusing to delete the current branch: %s", name);
return "deletion of the current branch prohibited";
}
}
}
if (deny_non_fast_forwards && !is_null_sha1(new_sha1) &&
!is_null_sha1(old_sha1) &&
!prefixcmp(name, "refs/heads/")) {
struct object *old_object, *new_object;
struct commit *old_commit, *new_commit;
struct commit_list *bases, *ent;
old_object = parse_object(old_sha1);
new_object = parse_object(new_sha1);
if (!old_object || !new_object ||
old_object->type != OBJ_COMMIT ||
new_object->type != OBJ_COMMIT) {
error("bad sha1 objects for %s", name);
return "bad ref";
}
old_commit = (struct commit *)old_object;
new_commit = (struct commit *)new_object;
bases = get_merge_bases(old_commit, new_commit, 1);
for (ent = bases; ent; ent = ent->next)
if (!hashcmp(old_sha1, ent->item->object.sha1))
break;
free_commit_list(bases);
if (!ent) {
error("denying non-fast forward %s"
" (you should pull first)", name);
return "non-fast forward";
}
}
if (run_update_hook(cmd)) {
error("hook declined to update %s", name);
return "hook declined";
}
if (is_null_sha1(new_sha1)) {
if (!parse_object(old_sha1)) {
warning ("Allowing deletion of corrupt ref.");
old_sha1 = NULL;
}
if (delete_ref(name, old_sha1, 0)) {
error("failed to delete %s", name);
return "failed to delete";
}
return NULL; /* good */
}
else {
lock = lock_any_ref_for_update(name, old_sha1, 0);
if (!lock) {
error("failed to lock %s", name);
return "failed to lock";
}
if (write_ref_sha1(lock, new_sha1, "push")) {
return "failed to write"; /* error() already called */
}
return NULL; /* good */
}
}
int cmd_check_ref_format(int argc, const char **argv, const char *prefix)
{
if (argc != 2)
usage("git-check-ref-format refname");
return !!check_ref_format(argv[1]);
}
int notes_merge(struct notes_merge_options *o,
struct notes_tree *local_tree,
unsigned char *result_sha1)
{
unsigned char local_sha1[20], remote_sha1[20];
struct commit *local, *remote;
struct commit_list *bases = NULL;
const unsigned char *base_sha1, *base_tree_sha1;
int result = 0;
assert(o->local_ref && o->remote_ref);
assert(!strcmp(o->local_ref, local_tree->ref));
hashclr(result_sha1);
trace_printf("notes_merge(o->local_ref = %s, o->remote_ref = %s)\n",
o->local_ref, o->remote_ref);
/* Dereference o->local_ref into local_sha1 */
if (!resolve_ref(o->local_ref, local_sha1, 0, NULL))
die("Failed to resolve local notes ref '%s'", o->local_ref);
else if (!check_ref_format(o->local_ref) && is_null_sha1(local_sha1))
local = NULL; /* local_sha1 == null_sha1 indicates unborn ref */
else if (!(local = lookup_commit_reference(local_sha1)))
die("Could not parse local commit %s (%s)",
sha1_to_hex(local_sha1), o->local_ref);
trace_printf("\tlocal commit: %.7s\n", sha1_to_hex(local_sha1));
/* Dereference o->remote_ref into remote_sha1 */
if (get_sha1(o->remote_ref, remote_sha1)) {
/*
* Failed to get remote_sha1. If o->remote_ref looks like an
* unborn ref, perform the merge using an empty notes tree.
*/
if (!check_ref_format(o->remote_ref)) {
hashclr(remote_sha1);
remote = NULL;
} else {
die("Failed to resolve remote notes ref '%s'",
o->remote_ref);
}
} else if (!(remote = lookup_commit_reference(remote_sha1))) {
die("Could not parse remote commit %s (%s)",
sha1_to_hex(remote_sha1), o->remote_ref);
}
trace_printf("\tremote commit: %.7s\n", sha1_to_hex(remote_sha1));
if (!local && !remote)
die("Cannot merge empty notes ref (%s) into empty notes ref "
"(%s)", o->remote_ref, o->local_ref);
if (!local) {
/* result == remote commit */
hashcpy(result_sha1, remote_sha1);
goto found_result;
}
if (!remote) {
/* result == local commit */
hashcpy(result_sha1, local_sha1);
goto found_result;
}
assert(local && remote);
/* Find merge bases */
bases = get_merge_bases(local, remote, 1);
if (!bases) {
base_sha1 = null_sha1;
base_tree_sha1 = EMPTY_TREE_SHA1_BIN;
OUTPUT(o, 4, "No merge base found; doing history-less merge");
} else if (!bases->next) {
base_sha1 = bases->item->object.sha1;
base_tree_sha1 = bases->item->tree->object.sha1;
OUTPUT(o, 4, "One merge base found (%.7s)",
sha1_to_hex(base_sha1));
} else {
/* TODO: How to handle multiple merge-bases? */
base_sha1 = bases->item->object.sha1;
base_tree_sha1 = bases->item->tree->object.sha1;
OUTPUT(o, 3, "Multiple merge bases found. Using the first "
"(%.7s)", sha1_to_hex(base_sha1));
}
OUTPUT(o, 4, "Merging remote commit %.7s into local commit %.7s with "
"merge-base %.7s", sha1_to_hex(remote->object.sha1),
sha1_to_hex(local->object.sha1), sha1_to_hex(base_sha1));
if (!hashcmp(remote->object.sha1, base_sha1)) {
/* Already merged; result == local commit */
OUTPUT(o, 2, "Already up-to-date!");
hashcpy(result_sha1, local->object.sha1);
goto found_result;
}
if (!hashcmp(local->object.sha1, base_sha1)) {
/* Fast-forward; result == remote commit */
OUTPUT(o, 2, "Fast-forward");
hashcpy(result_sha1, remote->object.sha1);
goto found_result;
}
result = merge_from_diffs(o, base_tree_sha1, local->tree->object.sha1,
remote->tree->object.sha1, local_tree);
if (result != 0) { /* non-trivial merge (with or without conflicts) */
/* Commit (partial) result */
struct commit_list *parents = NULL;
commit_list_insert(remote, &parents); /* LIFO order */
commit_list_insert(local, &parents);
create_notes_commit(local_tree, parents, o->commit_msg.buf,
result_sha1);
}
found_result:
free_commit_list(bases);
strbuf_release(&(o->commit_msg));
trace_printf("notes_merge(): result = %i, result_sha1 = %.7s\n",
result, sha1_to_hex(result_sha1));
return result;
}
void create_branch(const char *head,
const char *name, const char *start_name,
int force, int reflog, enum branch_track track)
{
struct ref_lock *lock;
struct commit *commit;
unsigned char sha1[20];
char *real_ref, msg[PATH_MAX + 20];
struct strbuf ref = STRBUF_INIT;
int forcing = 0;
int len;
len = strlen(name);
if (interpret_nth_last_branch(name, &ref) != len) {
strbuf_reset(&ref);
strbuf_add(&ref, name, len);
}
strbuf_splice(&ref, 0, 0, "refs/heads/", 11);
if (check_ref_format(ref.buf))
die("'%s' is not a valid branch name.", name);
if (resolve_ref(ref.buf, sha1, 1, NULL)) {
if (!force)
die("A branch named '%s' already exists.", name);
else if (!is_bare_repository() && !strcmp(head, name))
die("Cannot force update the current branch.");
forcing = 1;
}
real_ref = NULL;
if (get_sha1(start_name, sha1))
die("Not a valid object name: '%s'.", start_name);
switch (dwim_ref(start_name, strlen(start_name), sha1, &real_ref)) {
case 0:
/* Not branching from any existing branch */
if (track == BRANCH_TRACK_EXPLICIT)
die("Cannot setup tracking information; starting point is not a branch.");
break;
case 1:
/* Unique completion -- good, only if it is a real ref */
if (track == BRANCH_TRACK_EXPLICIT && !strcmp(real_ref, "HEAD"))
die("Cannot setup tracking information; starting point is not a branch.");
break;
default:
die("Ambiguous object name: '%s'.", start_name);
break;
}
if ((commit = lookup_commit_reference(sha1)) == NULL)
die("Not a valid branch point: '%s'.", start_name);
hashcpy(sha1, commit->object.sha1);
lock = lock_any_ref_for_update(ref.buf, NULL, 0);
if (!lock)
die("Failed to lock ref for update: %s.", strerror(errno));
if (reflog)
log_all_ref_updates = 1;
if (forcing)
snprintf(msg, sizeof msg, "branch: Reset from %s",
start_name);
else
snprintf(msg, sizeof msg, "branch: Created from %s",
start_name);
if (real_ref && track)
setup_tracking(name, real_ref, track);
if (write_ref_sha1(lock, sha1, msg) < 0)
die("Failed to write ref: %s.", strerror(errno));
strbuf_release(&ref);
free(real_ref);
}
