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1 | #include "git-compat-util.h" | |
2 | #include "cache.h" | |
3 | #include "branch.h" | |
4 | #include "refs.h" | |
5 | #include "remote.h" | |
6 | #include "commit.h" | |
7 | #include "worktree.h" | |
8 | ||
9 | struct tracking { | |
10 | struct refspec spec; | |
11 | char *src; | |
12 | const char *remote; | |
13 | int matches; | |
14 | }; | |
15 | ||
16 | static int find_tracked_branch(struct remote *remote, void *priv) | |
17 | { | |
18 | struct tracking *tracking = priv; | |
19 | ||
20 | if (!remote_find_tracking(remote, &tracking->spec)) { | |
21 | if (++tracking->matches == 1) { | |
22 | tracking->src = tracking->spec.src; | |
23 | tracking->remote = remote->name; | |
24 | } else { | |
25 | free(tracking->spec.src); | |
26 | if (tracking->src) { | |
27 | free(tracking->src); | |
28 | tracking->src = NULL; | |
29 | } | |
30 | } | |
31 | tracking->spec.src = NULL; | |
32 | } | |
33 | ||
34 | return 0; | |
35 | } | |
36 | ||
37 | static int should_setup_rebase(const char *origin) | |
38 | { | |
39 | switch (autorebase) { | |
40 | case AUTOREBASE_NEVER: | |
41 | return 0; | |
42 | case AUTOREBASE_LOCAL: | |
43 | return origin == NULL; | |
44 | case AUTOREBASE_REMOTE: | |
45 | return origin != NULL; | |
46 | case AUTOREBASE_ALWAYS: | |
47 | return 1; | |
48 | } | |
49 | return 0; | |
50 | } | |
51 | ||
52 | static const char tracking_advice[] = | |
53 | N_("\n" | |
54 | "After fixing the error cause you may try to fix up\n" | |
55 | "the remote tracking information by invoking\n" | |
56 | "\"git branch --set-upstream-to=%s%s%s\"."); | |
57 | ||
58 | int install_branch_config(int flag, const char *local, const char *origin, const char *remote) | |
59 | { | |
60 | const char *shortname = NULL; | |
61 | struct strbuf key = STRBUF_INIT; | |
62 | int rebasing = should_setup_rebase(origin); | |
63 | ||
64 | if (skip_prefix(remote, "refs/heads/", &shortname) | |
65 | && !strcmp(local, shortname) | |
66 | && !origin) { | |
67 | warning(_("Not setting branch %s as its own upstream."), | |
68 | local); | |
69 | return 0; | |
70 | } | |
71 | ||
72 | strbuf_addf(&key, "branch.%s.remote", local); | |
73 | if (git_config_set_gently(key.buf, origin ? origin : ".") < 0) | |
74 | goto out_err; | |
75 | ||
76 | strbuf_reset(&key); | |
77 | strbuf_addf(&key, "branch.%s.merge", local); | |
78 | if (git_config_set_gently(key.buf, remote) < 0) | |
79 | goto out_err; | |
80 | ||
81 | if (rebasing) { | |
82 | strbuf_reset(&key); | |
83 | strbuf_addf(&key, "branch.%s.rebase", local); | |
84 | if (git_config_set_gently(key.buf, "true") < 0) | |
85 | goto out_err; | |
86 | } | |
87 | strbuf_release(&key); | |
88 | ||
89 | if (flag & BRANCH_CONFIG_VERBOSE) { | |
90 | if (shortname) { | |
91 | if (origin) | |
92 | printf_ln(rebasing ? | |
93 | _("Branch %s set up to track remote branch %s from %s by rebasing.") : | |
94 | _("Branch %s set up to track remote branch %s from %s."), | |
95 | local, shortname, origin); | |
96 | else | |
97 | printf_ln(rebasing ? | |
98 | _("Branch %s set up to track local branch %s by rebasing.") : | |
99 | _("Branch %s set up to track local branch %s."), | |
100 | local, shortname); | |
101 | } else { | |
102 | if (origin) | |
103 | printf_ln(rebasing ? | |
104 | _("Branch %s set up to track remote ref %s by rebasing.") : | |
105 | _("Branch %s set up to track remote ref %s."), | |
106 | local, remote); | |
107 | else | |
108 | printf_ln(rebasing ? | |
109 | _("Branch %s set up to track local ref %s by rebasing.") : | |
110 | _("Branch %s set up to track local ref %s."), | |
111 | local, remote); | |
112 | } | |
113 | } | |
114 | ||
115 | return 0; | |
116 | ||
117 | out_err: | |
118 | strbuf_release(&key); | |
119 | error(_("Unable to write upstream branch configuration")); | |
120 | ||
121 | advise(_(tracking_advice), | |
122 | origin ? origin : "", | |
123 | origin ? "/" : "", | |
124 | shortname ? shortname : remote); | |
125 | ||
126 | return -1; | |
127 | } | |
128 | ||
129 | /* | |
130 | * This is called when new_ref is branched off of orig_ref, and tries | |
131 | * to infer the settings for branch.<new_ref>.{remote,merge} from the | |
132 | * config. | |
133 | */ | |
134 | static void setup_tracking(const char *new_ref, const char *orig_ref, | |
135 | enum branch_track track, int quiet) | |
136 | { | |
137 | struct tracking tracking; | |
138 | int config_flags = quiet ? 0 : BRANCH_CONFIG_VERBOSE; | |
139 | ||
140 | memset(&tracking, 0, sizeof(tracking)); | |
141 | tracking.spec.dst = (char *)orig_ref; | |
142 | if (for_each_remote(find_tracked_branch, &tracking)) | |
143 | return; | |
144 | ||
145 | if (!tracking.matches) | |
146 | switch (track) { | |
147 | case BRANCH_TRACK_ALWAYS: | |
148 | case BRANCH_TRACK_EXPLICIT: | |
149 | case BRANCH_TRACK_OVERRIDE: | |
150 | break; | |
151 | default: | |
152 | return; | |
153 | } | |
154 | ||
155 | if (tracking.matches > 1) | |
156 | die(_("Not tracking: ambiguous information for ref %s"), | |
157 | orig_ref); | |
158 | ||
159 | if (install_branch_config(config_flags, new_ref, tracking.remote, | |
160 | tracking.src ? tracking.src : orig_ref) < 0) | |
161 | exit(-1); | |
162 | ||
163 | free(tracking.src); | |
164 | } | |
165 | ||
166 | int read_branch_desc(struct strbuf *buf, const char *branch_name) | |
167 | { | |
168 | char *v = NULL; | |
169 | struct strbuf name = STRBUF_INIT; | |
170 | strbuf_addf(&name, "branch.%s.description", branch_name); | |
171 | if (git_config_get_string(name.buf, &v)) { | |
172 | strbuf_release(&name); | |
173 | return -1; | |
174 | } | |
175 | strbuf_addstr(buf, v); | |
176 | free(v); | |
177 | strbuf_release(&name); | |
178 | return 0; | |
179 | } | |
180 | ||
181 | int validate_new_branchname(const char *name, struct strbuf *ref, | |
182 | int force, int attr_only) | |
183 | { | |
184 | if (strbuf_check_branch_ref(ref, name)) | |
185 | die(_("'%s' is not a valid branch name."), name); | |
186 | ||
187 | if (!ref_exists(ref->buf)) | |
188 | return 0; | |
189 | else if (!force && !attr_only) | |
190 | die(_("A branch named '%s' already exists."), ref->buf + strlen("refs/heads/")); | |
191 | ||
192 | if (!attr_only) { | |
193 | const char *head; | |
194 | unsigned char sha1[20]; | |
195 | ||
196 | head = resolve_ref_unsafe("HEAD", 0, sha1, NULL); | |
197 | if (!is_bare_repository() && head && !strcmp(head, ref->buf)) | |
198 | die(_("Cannot force update the current branch.")); | |
199 | } | |
200 | return 1; | |
201 | } | |
202 | ||
203 | static int check_tracking_branch(struct remote *remote, void *cb_data) | |
204 | { | |
205 | char *tracking_branch = cb_data; | |
206 | struct refspec query; | |
207 | memset(&query, 0, sizeof(struct refspec)); | |
208 | query.dst = tracking_branch; | |
209 | return !remote_find_tracking(remote, &query); | |
210 | } | |
211 | ||
212 | static int validate_remote_tracking_branch(char *ref) | |
213 | { | |
214 | return !for_each_remote(check_tracking_branch, ref); | |
215 | } | |
216 | ||
217 | static const char upstream_not_branch[] = | |
218 | N_("Cannot setup tracking information; starting point '%s' is not a branch."); | |
219 | static const char upstream_missing[] = | |
220 | N_("the requested upstream branch '%s' does not exist"); | |
221 | static const char upstream_advice[] = | |
222 | N_("\n" | |
223 | "If you are planning on basing your work on an upstream\n" | |
224 | "branch that already exists at the remote, you may need to\n" | |
225 | "run \"git fetch\" to retrieve it.\n" | |
226 | "\n" | |
227 | "If you are planning to push out a new local branch that\n" | |
228 | "will track its remote counterpart, you may want to use\n" | |
229 | "\"git push -u\" to set the upstream config as you push."); | |
230 | ||
231 | void create_branch(const char *name, const char *start_name, | |
232 | int force, int reflog, int clobber_head, | |
233 | int quiet, enum branch_track track) | |
234 | { | |
235 | struct commit *commit; | |
236 | unsigned char sha1[20]; | |
237 | char *real_ref, msg[PATH_MAX + 20]; | |
238 | struct strbuf ref = STRBUF_INIT; | |
239 | int forcing = 0; | |
240 | int dont_change_ref = 0; | |
241 | int explicit_tracking = 0; | |
242 | ||
243 | if (track == BRANCH_TRACK_EXPLICIT || track == BRANCH_TRACK_OVERRIDE) | |
244 | explicit_tracking = 1; | |
245 | ||
246 | if (validate_new_branchname(name, &ref, force, | |
247 | track == BRANCH_TRACK_OVERRIDE || | |
248 | clobber_head)) { | |
249 | if (!force) | |
250 | dont_change_ref = 1; | |
251 | else | |
252 | forcing = 1; | |
253 | } | |
254 | ||
255 | real_ref = NULL; | |
256 | if (get_sha1(start_name, sha1)) { | |
257 | if (explicit_tracking) { | |
258 | if (advice_set_upstream_failure) { | |
259 | error(_(upstream_missing), start_name); | |
260 | advise(_(upstream_advice)); | |
261 | exit(1); | |
262 | } | |
263 | die(_(upstream_missing), start_name); | |
264 | } | |
265 | die(_("Not a valid object name: '%s'."), start_name); | |
266 | } | |
267 | ||
268 | switch (dwim_ref(start_name, strlen(start_name), sha1, &real_ref)) { | |
269 | case 0: | |
270 | /* Not branching from any existing branch */ | |
271 | if (explicit_tracking) | |
272 | die(_(upstream_not_branch), start_name); | |
273 | break; | |
274 | case 1: | |
275 | /* Unique completion -- good, only if it is a real branch */ | |
276 | if (!starts_with(real_ref, "refs/heads/") && | |
277 | validate_remote_tracking_branch(real_ref)) { | |
278 | if (explicit_tracking) | |
279 | die(_(upstream_not_branch), start_name); | |
280 | else | |
281 | real_ref = NULL; | |
282 | } | |
283 | break; | |
284 | default: | |
285 | die(_("Ambiguous object name: '%s'."), start_name); | |
286 | break; | |
287 | } | |
288 | ||
289 | if ((commit = lookup_commit_reference(sha1)) == NULL) | |
290 | die(_("Not a valid branch point: '%s'."), start_name); | |
291 | hashcpy(sha1, commit->object.oid.hash); | |
292 | ||
293 | if (forcing) | |
294 | snprintf(msg, sizeof msg, "branch: Reset to %s", | |
295 | start_name); | |
296 | else if (!dont_change_ref) | |
297 | snprintf(msg, sizeof msg, "branch: Created from %s", | |
298 | start_name); | |
299 | ||
300 | if (reflog) | |
301 | log_all_ref_updates = 1; | |
302 | ||
303 | if (!dont_change_ref) { | |
304 | struct ref_transaction *transaction; | |
305 | struct strbuf err = STRBUF_INIT; | |
306 | ||
307 | transaction = ref_transaction_begin(&err); | |
308 | if (!transaction || | |
309 | ref_transaction_update(transaction, ref.buf, | |
310 | sha1, forcing ? NULL : null_sha1, | |
311 | 0, msg, &err) || | |
312 | ref_transaction_commit(transaction, &err)) | |
313 | die("%s", err.buf); | |
314 | ref_transaction_free(transaction); | |
315 | strbuf_release(&err); | |
316 | } | |
317 | ||
318 | if (real_ref && track) | |
319 | setup_tracking(ref.buf + 11, real_ref, track, quiet); | |
320 | ||
321 | strbuf_release(&ref); | |
322 | free(real_ref); | |
323 | } | |
324 | ||
325 | void remove_branch_state(void) | |
326 | { | |
327 | unlink(git_path_cherry_pick_head()); | |
328 | unlink(git_path_revert_head()); | |
329 | unlink(git_path_merge_head()); | |
330 | unlink(git_path_merge_rr()); | |
331 | unlink(git_path_merge_msg()); | |
332 | unlink(git_path_merge_mode()); | |
333 | unlink(git_path_squash_msg()); | |
334 | } | |
335 | ||
336 | void die_if_checked_out(const char *branch, int ignore_current_worktree) | |
337 | { | |
338 | const struct worktree *wt; | |
339 | ||
340 | wt = find_shared_symref("HEAD", branch); | |
341 | if (!wt || (ignore_current_worktree && wt->is_current)) | |
342 | return; | |
343 | skip_prefix(branch, "refs/heads/", &branch); | |
344 | die(_("'%s' is already checked out at '%s'"), | |
345 | branch, wt->path); | |
346 | } | |
347 | ||
348 | int replace_each_worktree_head_symref(const char *oldref, const char *newref) | |
349 | { | |
350 | int ret = 0; | |
351 | struct worktree **worktrees = get_worktrees(0); | |
352 | int i; | |
353 | ||
354 | for (i = 0; worktrees[i]; i++) { | |
355 | if (worktrees[i]->is_detached) | |
356 | continue; | |
357 | if (strcmp(oldref, worktrees[i]->head_ref)) | |
358 | continue; | |
359 | ||
360 | if (set_worktree_head_symref(get_worktree_git_dir(worktrees[i]), | |
361 | newref)) { | |
362 | ret = -1; | |
363 | error(_("HEAD of working tree %s is not updated"), | |
364 | worktrees[i]->path); | |
365 | } | |
366 | } | |
367 | ||
368 | free_worktrees(worktrees); | |
369 | return ret; | |
370 | } |