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b888d61c DB |
1 | /* |
2 | * "git fetch" | |
3 | */ | |
4 | #include "cache.h" | |
5 | #include "refs.h" | |
6 | #include "commit.h" | |
7 | #include "builtin.h" | |
8 | #include "path-list.h" | |
9 | #include "remote.h" | |
10 | #include "transport.h" | |
11 | ||
12 | static const char fetch_usage[] = "git-fetch [-a | --append] [--upload-pack <upload-pack>] [-f | --force] [--no-tags] [-t | --tags] [-k | --keep] [-u | --update-head-ok] [--depth <depth>] [-v | --verbose] [<repository> <refspec>...]"; | |
13 | ||
14 | static int append, force, tags, no_tags, update_head_ok, verbose, quiet; | |
b888d61c DB |
15 | static char *default_rla = NULL; |
16 | ||
17 | static void find_merge_config(struct ref *ref_map, struct remote *remote) | |
18 | { | |
19 | struct ref *rm = ref_map; | |
20 | struct branch *branch = branch_get(NULL); | |
21 | ||
22 | for (rm = ref_map; rm; rm = rm->next) { | |
23 | if (!branch_has_merge_config(branch)) { | |
24 | if (remote && remote->fetch && | |
25 | !strcmp(remote->fetch[0].src, rm->name)) | |
26 | rm->merge = 1; | |
27 | } else { | |
28 | if (branch_merges(branch, rm->name)) | |
29 | rm->merge = 1; | |
30 | } | |
31 | } | |
32 | } | |
33 | ||
34 | static struct ref *get_ref_map(struct transport *transport, | |
35 | struct refspec *refs, int ref_count, int tags, | |
36 | int *autotags) | |
37 | { | |
38 | int i; | |
39 | struct ref *rm; | |
40 | struct ref *ref_map = NULL; | |
41 | struct ref **tail = &ref_map; | |
42 | ||
43 | struct ref *remote_refs = transport_get_remote_refs(transport); | |
44 | ||
45 | if (ref_count || tags) { | |
46 | for (i = 0; i < ref_count; i++) { | |
47 | get_fetch_map(remote_refs, &refs[i], &tail); | |
48 | if (refs[i].dst && refs[i].dst[0]) | |
49 | *autotags = 1; | |
50 | } | |
51 | /* Merge everything on the command line, but not --tags */ | |
52 | for (rm = ref_map; rm; rm = rm->next) | |
53 | rm->merge = 1; | |
54 | if (tags) { | |
55 | struct refspec refspec; | |
56 | refspec.src = "refs/tags/"; | |
57 | refspec.dst = "refs/tags/"; | |
58 | refspec.pattern = 1; | |
59 | refspec.force = 0; | |
60 | get_fetch_map(remote_refs, &refspec, &tail); | |
61 | } | |
62 | } else { | |
63 | /* Use the defaults */ | |
64 | struct remote *remote = transport->remote; | |
65 | if (remote->fetch_refspec_nr) { | |
66 | for (i = 0; i < remote->fetch_refspec_nr; i++) { | |
67 | get_fetch_map(remote_refs, &remote->fetch[i], &tail); | |
68 | if (remote->fetch[i].dst && | |
69 | remote->fetch[i].dst[0]) | |
70 | *autotags = 1; | |
71 | } | |
72 | find_merge_config(ref_map, remote); | |
73 | } else { | |
74 | ref_map = get_remote_ref(remote_refs, "HEAD"); | |
75 | ||
76 | ref_map->merge = 1; | |
77 | } | |
78 | } | |
79 | ||
80 | return ref_map; | |
81 | } | |
82 | ||
83 | static void show_new(enum object_type type, unsigned char *sha1_new) | |
84 | { | |
85 | fprintf(stderr, " %s: %s\n", typename(type), | |
86 | find_unique_abbrev(sha1_new, DEFAULT_ABBREV)); | |
87 | } | |
88 | ||
89 | static int s_update_ref(const char *action, | |
90 | struct ref *ref, | |
91 | int check_old) | |
92 | { | |
93 | char msg[1024]; | |
94 | char *rla = getenv("GIT_REFLOG_ACTION"); | |
95 | static struct ref_lock *lock; | |
96 | ||
97 | if (!rla) | |
98 | rla = default_rla; | |
99 | snprintf(msg, sizeof(msg), "%s: %s", rla, action); | |
100 | lock = lock_any_ref_for_update(ref->name, | |
101 | check_old ? ref->old_sha1 : NULL, 0); | |
102 | if (!lock) | |
103 | return 1; | |
104 | if (write_ref_sha1(lock, ref->new_sha1, msg) < 0) | |
105 | return 1; | |
106 | return 0; | |
107 | } | |
108 | ||
109 | static int update_local_ref(struct ref *ref, | |
110 | const char *note, | |
111 | int verbose) | |
112 | { | |
113 | char oldh[41], newh[41]; | |
114 | struct commit *current = NULL, *updated; | |
115 | enum object_type type; | |
116 | struct branch *current_branch = branch_get(NULL); | |
117 | ||
118 | type = sha1_object_info(ref->new_sha1, NULL); | |
119 | if (type < 0) | |
120 | die("object %s not found", sha1_to_hex(ref->new_sha1)); | |
121 | ||
122 | if (!*ref->name) { | |
123 | /* Not storing */ | |
124 | if (verbose) { | |
125 | fprintf(stderr, "* fetched %s\n", note); | |
126 | show_new(type, ref->new_sha1); | |
127 | } | |
128 | return 0; | |
129 | } | |
130 | ||
131 | if (!hashcmp(ref->old_sha1, ref->new_sha1)) { | |
132 | if (verbose) { | |
133 | fprintf(stderr, "* %s: same as %s\n", | |
134 | ref->name, note); | |
135 | show_new(type, ref->new_sha1); | |
136 | } | |
137 | return 0; | |
138 | } | |
139 | ||
140 | if (!strcmp(ref->name, current_branch->name) && | |
141 | !(update_head_ok || is_bare_repository()) && | |
142 | !is_null_sha1(ref->old_sha1)) { | |
143 | /* | |
144 | * If this is the head, and it's not okay to update | |
145 | * the head, and the old value of the head isn't empty... | |
146 | */ | |
147 | fprintf(stderr, | |
148 | " * %s: Cannot fetch into the current branch.\n", | |
149 | ref->name); | |
150 | return 1; | |
151 | } | |
152 | ||
153 | if (!is_null_sha1(ref->old_sha1) && | |
154 | !prefixcmp(ref->name, "refs/tags/")) { | |
155 | fprintf(stderr, "* %s: updating with %s\n", | |
156 | ref->name, note); | |
157 | show_new(type, ref->new_sha1); | |
158 | return s_update_ref("updating tag", ref, 0); | |
159 | } | |
160 | ||
161 | current = lookup_commit_reference(ref->old_sha1); | |
162 | updated = lookup_commit_reference(ref->new_sha1); | |
163 | if (!current || !updated) { | |
164 | char *msg; | |
165 | if (!strncmp(ref->name, "refs/tags/", 10)) | |
166 | msg = "storing tag"; | |
167 | else | |
168 | msg = "storing head"; | |
169 | fprintf(stderr, "* %s: storing %s\n", | |
170 | ref->name, note); | |
171 | show_new(type, ref->new_sha1); | |
172 | return s_update_ref(msg, ref, 0); | |
173 | } | |
174 | ||
175 | strcpy(oldh, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV)); | |
176 | strcpy(newh, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV)); | |
177 | ||
178 | if (in_merge_bases(current, &updated, 1)) { | |
179 | fprintf(stderr, "* %s: fast forward to %s\n", | |
180 | ref->name, note); | |
181 | fprintf(stderr, " old..new: %s..%s\n", oldh, newh); | |
182 | return s_update_ref("fast forward", ref, 1); | |
183 | } | |
184 | if (!force && !ref->force) { | |
185 | fprintf(stderr, | |
186 | "* %s: not updating to non-fast forward %s\n", | |
187 | ref->name, note); | |
188 | fprintf(stderr, | |
189 | " old...new: %s...%s\n", oldh, newh); | |
190 | return 1; | |
191 | } | |
192 | fprintf(stderr, | |
193 | "* %s: forcing update to non-fast forward %s\n", | |
194 | ref->name, note); | |
195 | fprintf(stderr, " old...new: %s...%s\n", oldh, newh); | |
196 | return s_update_ref("forced-update", ref, 1); | |
197 | } | |
198 | ||
199 | static void store_updated_refs(const char *url, struct ref *ref_map) | |
200 | { | |
201 | FILE *fp; | |
202 | struct commit *commit; | |
203 | int url_len, i, note_len; | |
204 | char note[1024]; | |
205 | const char *what, *kind; | |
206 | struct ref *rm; | |
207 | ||
208 | fp = fopen(git_path("FETCH_HEAD"), "a"); | |
209 | for (rm = ref_map; rm; rm = rm->next) { | |
210 | struct ref *ref = NULL; | |
211 | ||
212 | if (rm->peer_ref) { | |
213 | ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1); | |
214 | strcpy(ref->name, rm->peer_ref->name); | |
215 | hashcpy(ref->old_sha1, rm->peer_ref->old_sha1); | |
216 | hashcpy(ref->new_sha1, rm->old_sha1); | |
1aad91f5 | 217 | ref->force = rm->peer_ref->force; |
b888d61c DB |
218 | } |
219 | ||
220 | commit = lookup_commit_reference(rm->old_sha1); | |
221 | if (!commit) | |
222 | rm->merge = 0; | |
223 | ||
224 | if (!strcmp(rm->name, "HEAD")) { | |
225 | kind = ""; | |
226 | what = ""; | |
227 | } | |
228 | else if (!prefixcmp(rm->name, "refs/heads/")) { | |
229 | kind = "branch"; | |
230 | what = rm->name + 11; | |
231 | } | |
232 | else if (!prefixcmp(rm->name, "refs/tags/")) { | |
233 | kind = "tag"; | |
234 | what = rm->name + 10; | |
235 | } | |
236 | else if (!prefixcmp(rm->name, "refs/remotes/")) { | |
237 | kind = "remote branch"; | |
238 | what = rm->name + 13; | |
239 | } | |
240 | else { | |
241 | kind = ""; | |
242 | what = rm->name; | |
243 | } | |
244 | ||
245 | url_len = strlen(url); | |
246 | for (i = url_len - 1; url[i] == '/' && 0 <= i; i--) | |
247 | ; | |
248 | url_len = i + 1; | |
249 | if (4 < i && !strncmp(".git", url + i - 3, 4)) | |
250 | url_len = i - 3; | |
251 | ||
252 | note_len = 0; | |
253 | if (*what) { | |
254 | if (*kind) | |
255 | note_len += sprintf(note + note_len, "%s ", | |
256 | kind); | |
257 | note_len += sprintf(note + note_len, "'%s' of ", what); | |
258 | } | |
259 | note_len += sprintf(note + note_len, "%.*s", url_len, url); | |
260 | fprintf(fp, "%s\t%s\t%s\n", | |
261 | sha1_to_hex(commit ? commit->object.sha1 : | |
262 | rm->old_sha1), | |
263 | rm->merge ? "" : "not-for-merge", | |
264 | note); | |
265 | ||
266 | if (ref) | |
267 | update_local_ref(ref, note, verbose); | |
268 | } | |
269 | fclose(fp); | |
270 | } | |
271 | ||
272 | static int fetch_refs(struct transport *transport, struct ref *ref_map) | |
273 | { | |
274 | int ret = transport_fetch_refs(transport, ref_map); | |
275 | if (!ret) | |
276 | store_updated_refs(transport->url, ref_map); | |
277 | return ret; | |
278 | } | |
279 | ||
280 | static int add_existing(const char *refname, const unsigned char *sha1, | |
281 | int flag, void *cbdata) | |
282 | { | |
283 | struct path_list *list = (struct path_list *)cbdata; | |
284 | path_list_insert(refname, list); | |
285 | return 0; | |
286 | } | |
287 | ||
288 | static struct ref *find_non_local_tags(struct transport *transport, | |
289 | struct ref *fetch_map) | |
290 | { | |
291 | static struct path_list existing_refs = { NULL, 0, 0, 0 }; | |
292 | struct path_list new_refs = { NULL, 0, 0, 1 }; | |
293 | char *ref_name; | |
294 | int ref_name_len; | |
295 | unsigned char *ref_sha1; | |
296 | struct ref *tag_ref; | |
297 | struct ref *rm = NULL; | |
298 | struct ref *ref_map = NULL; | |
299 | struct ref **tail = &ref_map; | |
300 | struct ref *ref; | |
301 | ||
302 | for_each_ref(add_existing, &existing_refs); | |
303 | for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) { | |
304 | if (prefixcmp(ref->name, "refs/tags")) | |
305 | continue; | |
306 | ||
307 | ref_name = xstrdup(ref->name); | |
308 | ref_name_len = strlen(ref_name); | |
309 | ref_sha1 = ref->old_sha1; | |
310 | ||
311 | if (!strcmp(ref_name + ref_name_len - 3, "^{}")) { | |
312 | ref_name[ref_name_len - 3] = 0; | |
313 | tag_ref = transport_get_remote_refs(transport); | |
314 | while (tag_ref) { | |
315 | if (!strcmp(tag_ref->name, ref_name)) { | |
316 | ref_sha1 = tag_ref->old_sha1; | |
317 | break; | |
318 | } | |
319 | tag_ref = tag_ref->next; | |
320 | } | |
321 | } | |
322 | ||
323 | if (!path_list_has_path(&existing_refs, ref_name) && | |
324 | !path_list_has_path(&new_refs, ref_name) && | |
325 | lookup_object(ref->old_sha1)) { | |
326 | fprintf(stderr, "Auto-following %s\n", | |
327 | ref_name); | |
328 | ||
329 | path_list_insert(ref_name, &new_refs); | |
330 | ||
331 | rm = alloc_ref(strlen(ref_name) + 1); | |
332 | strcpy(rm->name, ref_name); | |
333 | rm->peer_ref = alloc_ref(strlen(ref_name) + 1); | |
334 | strcpy(rm->peer_ref->name, ref_name); | |
335 | hashcpy(rm->old_sha1, ref_sha1); | |
336 | ||
337 | *tail = rm; | |
338 | tail = &rm->next; | |
339 | } | |
340 | free(ref_name); | |
341 | } | |
342 | ||
343 | return ref_map; | |
344 | } | |
345 | ||
346 | static int do_fetch(struct transport *transport, | |
347 | struct refspec *refs, int ref_count) | |
348 | { | |
349 | struct ref *ref_map, *fetch_map; | |
350 | struct ref *rm; | |
351 | int autotags = (transport->remote->fetch_tags == 1); | |
352 | if (transport->remote->fetch_tags == 2 && !no_tags) | |
353 | tags = 1; | |
354 | if (transport->remote->fetch_tags == -1) | |
355 | no_tags = 1; | |
356 | ||
357 | if (!transport->ops || !transport->ops->get_refs_list || | |
358 | !(transport->ops->fetch_refs || transport->ops->fetch_objs)) | |
359 | die("Don't know how to fetch from %s", transport->url); | |
360 | ||
361 | /* if not appending, truncate FETCH_HEAD */ | |
362 | if (!append) | |
363 | fclose(fopen(git_path("FETCH_HEAD"), "w")); | |
364 | ||
365 | ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags); | |
366 | ||
367 | for (rm = ref_map; rm; rm = rm->next) { | |
368 | if (rm->peer_ref) | |
369 | read_ref(rm->peer_ref->name, rm->peer_ref->old_sha1); | |
b888d61c DB |
370 | } |
371 | ||
372 | if (fetch_refs(transport, ref_map)) { | |
373 | free_refs(ref_map); | |
374 | return 1; | |
375 | } | |
376 | ||
377 | fetch_map = ref_map; | |
378 | ||
379 | /* if neither --no-tags nor --tags was specified, do automated tag | |
380 | * following ... */ | |
381 | if (!(tags || no_tags) && autotags) { | |
382 | ref_map = find_non_local_tags(transport, fetch_map); | |
383 | if (ref_map) { | |
384 | transport_set_option(transport, TRANS_OPT_DEPTH, "0"); | |
385 | fetch_refs(transport, ref_map); | |
386 | } | |
387 | free_refs(ref_map); | |
388 | } | |
389 | ||
390 | free_refs(fetch_map); | |
391 | ||
392 | return 0; | |
393 | } | |
394 | ||
b888d61c DB |
395 | int cmd_fetch(int argc, const char **argv, const char *prefix) |
396 | { | |
397 | struct remote *remote; | |
398 | struct transport *transport; | |
399 | int i, j, rla_offset; | |
400 | static const char **refs = NULL; | |
401 | int ref_nr = 0; | |
402 | int cmd_len = 0; | |
403 | const char *depth = NULL, *upload_pack = NULL; | |
404 | int keep = 0; | |
405 | ||
b888d61c DB |
406 | for (i = 1; i < argc; i++) { |
407 | const char *arg = argv[i]; | |
408 | cmd_len += strlen(arg); | |
409 | ||
410 | if (arg[0] != '-') | |
411 | break; | |
412 | if (!strcmp(arg, "--append") || !strcmp(arg, "-a")) { | |
413 | append = 1; | |
414 | continue; | |
415 | } | |
416 | if (!prefixcmp(arg, "--upload-pack=")) { | |
417 | upload_pack = arg + 14; | |
418 | continue; | |
419 | } | |
420 | if (!strcmp(arg, "--upload-pack")) { | |
421 | i++; | |
422 | if (i == argc) | |
423 | usage(fetch_usage); | |
424 | upload_pack = argv[i]; | |
425 | continue; | |
426 | } | |
427 | if (!strcmp(arg, "--force") || !strcmp(arg, "-f")) { | |
428 | force = 1; | |
429 | continue; | |
430 | } | |
431 | if (!strcmp(arg, "--no-tags")) { | |
432 | no_tags = 1; | |
433 | continue; | |
434 | } | |
435 | if (!strcmp(arg, "--tags") || !strcmp(arg, "-t")) { | |
436 | tags = 1; | |
437 | continue; | |
438 | } | |
439 | if (!strcmp(arg, "--keep") || !strcmp(arg, "-k")) { | |
440 | keep = 1; | |
441 | continue; | |
442 | } | |
443 | if (!strcmp(arg, "--update-head-ok") || !strcmp(arg, "-u")) { | |
444 | update_head_ok = 1; | |
445 | continue; | |
446 | } | |
447 | if (!prefixcmp(arg, "--depth=")) { | |
448 | depth = arg + 8; | |
449 | continue; | |
450 | } | |
451 | if (!strcmp(arg, "--depth")) { | |
452 | i++; | |
453 | if (i == argc) | |
454 | usage(fetch_usage); | |
455 | depth = argv[i]; | |
456 | continue; | |
457 | } | |
458 | if (!strcmp(arg, "--quiet")) { | |
459 | quiet = 1; | |
460 | continue; | |
461 | } | |
462 | if (!strcmp(arg, "--verbose") || !strcmp(arg, "-v")) { | |
463 | verbose++; | |
464 | continue; | |
465 | } | |
466 | usage(fetch_usage); | |
467 | } | |
468 | ||
469 | for (j = i; j < argc; j++) | |
470 | cmd_len += strlen(argv[j]); | |
471 | ||
472 | default_rla = xmalloc(cmd_len + 5 + argc + 1); | |
473 | sprintf(default_rla, "fetch"); | |
474 | rla_offset = strlen(default_rla); | |
475 | for (j = 1; j < argc; j++) { | |
476 | sprintf(default_rla + rla_offset, " %s", argv[j]); | |
4ad1eada | 477 | rla_offset += strlen(argv[j]) + 1; |
b888d61c DB |
478 | } |
479 | ||
480 | if (i == argc) | |
481 | remote = remote_get(NULL); | |
482 | else | |
483 | remote = remote_get(argv[i++]); | |
484 | ||
485 | transport = transport_get(remote, remote->uri[0], 1); | |
486 | if (verbose >= 2) | |
487 | transport->verbose = 1; | |
488 | if (quiet) | |
489 | transport->verbose = 0; | |
490 | if (upload_pack) | |
491 | transport_set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack); | |
492 | if (keep) | |
493 | transport_set_option(transport, TRANS_OPT_KEEP, "yes"); | |
494 | transport_set_option(transport, TRANS_OPT_DEPTH, depth); | |
495 | ||
496 | if (!transport->url) | |
497 | die("Where do you want to fetch from today?"); | |
498 | ||
499 | if (i < argc) { | |
500 | int j = 0; | |
501 | refs = xcalloc(argc - i + 1, sizeof(const char *)); | |
502 | while (i < argc) { | |
503 | if (!strcmp(argv[i], "tag")) { | |
504 | char *ref; | |
505 | i++; | |
506 | ref = xmalloc(strlen(argv[i]) * 2 + 22); | |
507 | strcpy(ref, "refs/tags/"); | |
508 | strcat(ref, argv[i]); | |
509 | strcat(ref, ":refs/tags/"); | |
510 | strcat(ref, argv[i]); | |
511 | refs[j++] = ref; | |
512 | } else | |
513 | refs[j++] = argv[i]; | |
514 | i++; | |
515 | } | |
516 | refs[j] = NULL; | |
517 | ref_nr = j; | |
518 | for (j = 0; refs[j]; j++) | |
519 | printf("ref: %s\n", refs[j]); | |
520 | } | |
521 | ||
522 | return do_fetch(transport, parse_ref_spec(ref_nr, refs), ref_nr); | |
523 | } |