15 static int find_tracked_branch(struct remote *remote, void *priv)
17 struct tracking *tracking = priv;
19 if (!remote_find_tracking(remote, &tracking->spec)) {
20 if (++tracking->matches == 1) {
21 tracking->src = tracking->spec.src;
22 tracking->remote = remote->name;
24 free(tracking->spec.src);
30 tracking->spec.src = NULL;
36 static int should_setup_rebase(const char *origin)
39 case AUTOREBASE_NEVER:
41 case AUTOREBASE_LOCAL:
42 return origin == NULL;
43 case AUTOREBASE_REMOTE:
44 return origin != NULL;
45 case AUTOREBASE_ALWAYS:
51 void install_branch_config(int flag, const char *local, const char *origin, const char *remote)
53 const char *shortname = remote + 11;
54 int remote_is_branch = !prefixcmp(remote, "refs/heads/");
55 struct strbuf key = STRBUF_INIT;
56 int rebasing = should_setup_rebase(origin);
59 && !strcmp(local, shortname)
61 warning("Not setting branch %s as its own upstream.",
66 strbuf_addf(&key, "branch.%s.remote", local);
67 git_config_set(key.buf, origin ? origin : ".");
70 strbuf_addf(&key, "branch.%s.merge", local);
71 git_config_set(key.buf, remote);
75 strbuf_addf(&key, "branch.%s.rebase", local);
76 git_config_set(key.buf, "true");
79 if (flag & BRANCH_CONFIG_VERBOSE) {
82 strbuf_addstr(&key, origin ? "remote" : "local");
84 /* Are we tracking a proper "branch"? */
85 if (remote_is_branch) {
86 strbuf_addf(&key, " branch %s", shortname);
88 strbuf_addf(&key, " from %s", origin);
91 strbuf_addf(&key, " ref %s", remote);
92 printf("Branch %s set up to track %s%s.\n",
94 rebasing ? " by rebasing" : "");
100 * This is called when new_ref is branched off of orig_ref, and tries
101 * to infer the settings for branch.<new_ref>.{remote,merge} from the
104 static int setup_tracking(const char *new_ref, const char *orig_ref,
105 enum branch_track track)
107 struct tracking tracking;
109 if (strlen(new_ref) > 1024 - 7 - 7 - 1)
110 return error("Tracking not set up: name too long: %s",
113 memset(&tracking, 0, sizeof(tracking));
114 tracking.spec.dst = (char *)orig_ref;
115 if (for_each_remote(find_tracked_branch, &tracking))
118 if (!tracking.matches)
120 case BRANCH_TRACK_ALWAYS:
121 case BRANCH_TRACK_EXPLICIT:
122 case BRANCH_TRACK_OVERRIDE:
128 if (tracking.matches > 1)
129 return error("Not tracking: ambiguous information for ref %s",
132 install_branch_config(BRANCH_CONFIG_VERBOSE, new_ref, tracking.remote,
133 tracking.src ? tracking.src : orig_ref);
139 int validate_new_branchname(const char *name, struct strbuf *ref, int force)
142 unsigned char sha1[20];
144 if (strbuf_check_branch_ref(ref, name))
145 die("'%s' is not a valid branch name.", name);
147 if (!ref_exists(ref->buf))
150 die("A branch named '%s' already exists.", ref->buf + strlen("refs/heads/"));
152 head = resolve_ref("HEAD", sha1, 0, NULL);
153 if (!is_bare_repository() && head && !strcmp(head, ref->buf))
154 die("Cannot force update the current branch.");
159 void create_branch(const char *head,
160 const char *name, const char *start_name,
161 int force, int reflog, enum branch_track track)
163 struct ref_lock *lock = NULL;
164 struct commit *commit;
165 unsigned char sha1[20];
166 char *real_ref, msg[PATH_MAX + 20];
167 struct strbuf ref = STRBUF_INIT;
169 int dont_change_ref = 0;
170 int explicit_tracking = 0;
172 if (track == BRANCH_TRACK_EXPLICIT || track == BRANCH_TRACK_OVERRIDE)
173 explicit_tracking = 1;
175 if (validate_new_branchname(name, &ref, force || track == BRANCH_TRACK_OVERRIDE)) {
183 if (get_sha1(start_name, sha1))
184 die("Not a valid object name: '%s'.", start_name);
186 switch (dwim_ref(start_name, strlen(start_name), sha1, &real_ref)) {
188 /* Not branching from any existing branch */
189 if (explicit_tracking)
190 die("Cannot setup tracking information; starting point is not a branch.");
193 /* Unique completion -- good, only if it is a real branch */
194 if (prefixcmp(real_ref, "refs/heads/") &&
195 prefixcmp(real_ref, "refs/remotes/")) {
196 if (explicit_tracking)
197 die("Cannot setup tracking information; starting point is not a branch.");
203 die("Ambiguous object name: '%s'.", start_name);
207 if ((commit = lookup_commit_reference(sha1)) == NULL)
208 die("Not a valid branch point: '%s'.", start_name);
209 hashcpy(sha1, commit->object.sha1);
211 if (!dont_change_ref) {
212 lock = lock_any_ref_for_update(ref.buf, NULL, 0);
214 die_errno("Failed to lock ref for update");
218 log_all_ref_updates = 1;
221 snprintf(msg, sizeof msg, "branch: Reset to %s",
223 else if (!dont_change_ref)
224 snprintf(msg, sizeof msg, "branch: Created from %s",
227 if (real_ref && track)
228 setup_tracking(ref.buf+11, real_ref, track);
230 if (!dont_change_ref)
231 if (write_ref_sha1(lock, sha1, msg) < 0)
232 die_errno("Failed to write ref");
234 strbuf_release(&ref);
238 void remove_branch_state(void)
240 unlink(git_path("CHERRY_PICK_HEAD"));
241 unlink(git_path("MERGE_HEAD"));
242 unlink(git_path("MERGE_RR"));
243 unlink(git_path("MERGE_MSG"));
244 unlink(git_path("MERGE_MODE"));
245 unlink(git_path("SQUASH_MSG"));
246 remove_sequencer_state(0);