void install_branch_config(int flag, const char *local, const char *origin, const char *remote)
{
+ const char *shortname = remote + 11;
+ int remote_is_branch = !prefixcmp(remote, "refs/heads/");
struct strbuf key = STRBUF_INIT;
int rebasing = should_setup_rebase(origin);
+ if (remote_is_branch
+ && !strcmp(local, shortname)
+ && !origin) {
+ warning("Not setting branch %s as its own upstream.",
+ local);
+ return;
+ }
+
strbuf_addf(&key, "branch.%s.remote", local);
git_config_set(key.buf, origin ? origin : ".");
strbuf_addstr(&key, origin ? "remote" : "local");
/* Are we tracking a proper "branch"? */
- if (!prefixcmp(remote, "refs/heads/")) {
- strbuf_addf(&key, " branch %s", remote + 11);
+ if (remote_is_branch) {
+ strbuf_addf(&key, " branch %s", shortname);
if (origin)
strbuf_addf(&key, " from %s", origin);
}
switch (track) {
case BRANCH_TRACK_ALWAYS:
case BRANCH_TRACK_EXPLICIT:
+ case BRANCH_TRACK_OVERRIDE:
break;
default:
return 1;
const char *name, const char *start_name,
int force, int reflog, enum branch_track track)
{
- struct ref_lock *lock;
+ struct ref_lock *lock = NULL;
struct commit *commit;
unsigned char sha1[20];
char *real_ref, msg[PATH_MAX + 20];
struct strbuf ref = STRBUF_INIT;
int forcing = 0;
- int len;
+ int dont_change_ref = 0;
+ int explicit_tracking = 0;
- 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 (track == BRANCH_TRACK_EXPLICIT || track == BRANCH_TRACK_OVERRIDE)
+ explicit_tracking = 1;
- if (check_ref_format(ref.buf))
+ if (strbuf_check_branch_ref(&ref, name))
die("'%s' is not a valid branch name.", name);
if (resolve_ref(ref.buf, sha1, 1, NULL)) {
- if (!force)
+ if (!force && track == BRANCH_TRACK_OVERRIDE)
+ dont_change_ref = 1;
+ else 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.");
switch (dwim_ref(start_name, strlen(start_name), sha1, &real_ref)) {
case 0:
/* Not branching from any existing branch */
- if (track == BRANCH_TRACK_EXPLICIT)
+ if (explicit_tracking)
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"))
+ if (explicit_tracking && !strcmp(real_ref, "HEAD"))
die("Cannot setup tracking information; starting point is not a branch.");
break;
default:
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 (!dont_change_ref) {
+ lock = lock_any_ref_for_update(ref.buf, NULL, 0);
+ if (!lock)
+ die_errno("Failed to lock ref for update");
+ }
if (reflog)
log_all_ref_updates = 1;
if (forcing)
- snprintf(msg, sizeof msg, "branch: Reset from %s",
+ snprintf(msg, sizeof msg, "branch: Reset to %s",
start_name);
- else
+ else if (!dont_change_ref)
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));
+ if (!dont_change_ref)
+ if (write_ref_sha1(lock, sha1, msg) < 0)
+ die_errno("Failed to write ref");
strbuf_release(&ref);
free(real_ref);