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Commit | Line | Data |
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def88e9a | 1 | #include "cache.h" |
fb9040cc | 2 | #include "refs.h" |
def88e9a | 3 | #include "pkt-line.h" |
49bb805e JH |
4 | #include "commit.h" |
5 | #include "tag.h" | |
def88e9a | 6 | |
ad897215 | 7 | static int keep_pack; |
8b3d9dc0 | 8 | static int quiet; |
33b83034 | 9 | static int verbose; |
dfeff66e | 10 | static int fetch_all; |
33b83034 | 11 | static const char fetch_pack_usage[] = |
dfeff66e | 12 | "git-fetch-pack [--all] [-q] [-v] [-k] [--thin] [--exec=upload-pack] [host:]directory <refs>..."; |
def88e9a LT |
13 | static const char *exec = "git-upload-pack"; |
14 | ||
0a8944dd | 15 | #define COMPLETE (1U << 0) |
23d61f83 JS |
16 | #define COMMON (1U << 1) |
17 | #define COMMON_REF (1U << 2) | |
18 | #define SEEN (1U << 3) | |
19 | #define POPPED (1U << 4) | |
20 | ||
f061e5fd JH |
21 | /* |
22 | * After sending this many "have"s if we do not get any new ACK , we | |
23 | * give up traversing our history. | |
24 | */ | |
25 | #define MAX_IN_VAIN 256 | |
26 | ||
23d61f83 | 27 | static struct commit_list *rev_list = NULL; |
583b7ea3 | 28 | static int non_common_revs = 0, multi_ack = 0, use_thin_pack = 0, use_sideband; |
23d61f83 JS |
29 | |
30 | static void rev_list_push(struct commit *commit, int mark) | |
31 | { | |
32 | if (!(commit->object.flags & mark)) { | |
33 | commit->object.flags |= mark; | |
34 | ||
35 | if (!(commit->object.parsed)) | |
36 | parse_commit(commit); | |
37 | ||
38 | insert_by_date(commit, &rev_list); | |
39 | ||
40 | if (!(commit->object.flags & COMMON)) | |
41 | non_common_revs++; | |
42 | } | |
43 | } | |
44 | ||
45 | static int rev_list_insert_ref(const char *path, const unsigned char *sha1) | |
46 | { | |
9534f40b | 47 | struct object *o = deref_tag(parse_object(sha1), path, 0); |
23d61f83 | 48 | |
885a86ab | 49 | if (o && o->type == TYPE_COMMIT) |
23d61f83 JS |
50 | rev_list_push((struct commit *)o, SEEN); |
51 | ||
52 | return 0; | |
53 | } | |
54 | ||
55 | /* | |
56 | This function marks a rev and its ancestors as common. | |
57 | In some cases, it is desirable to mark only the ancestors (for example | |
58 | when only the server does not yet know that they are common). | |
59 | */ | |
60 | ||
61 | static void mark_common(struct commit *commit, | |
62 | int ancestors_only, int dont_parse) | |
63 | { | |
64 | if (commit != NULL && !(commit->object.flags & COMMON)) { | |
65 | struct object *o = (struct object *)commit; | |
66 | ||
67 | if (!ancestors_only) | |
68 | o->flags |= COMMON; | |
69 | ||
70 | if (!(o->flags & SEEN)) | |
71 | rev_list_push(commit, SEEN); | |
72 | else { | |
73 | struct commit_list *parents; | |
74 | ||
75 | if (!ancestors_only && !(o->flags & POPPED)) | |
76 | non_common_revs--; | |
77 | if (!o->parsed && !dont_parse) | |
78 | parse_commit(commit); | |
79 | ||
80 | for (parents = commit->parents; | |
81 | parents; | |
82 | parents = parents->next) | |
83 | mark_common(parents->item, 0, dont_parse); | |
84 | } | |
85 | } | |
86 | } | |
87 | ||
88 | /* | |
89 | Get the next rev to send, ignoring the common. | |
90 | */ | |
91 | ||
962554c6 | 92 | static const unsigned char* get_rev(void) |
23d61f83 JS |
93 | { |
94 | struct commit *commit = NULL; | |
95 | ||
96 | while (commit == NULL) { | |
97 | unsigned int mark; | |
98 | struct commit_list* parents; | |
99 | ||
100 | if (rev_list == NULL || non_common_revs == 0) | |
101 | return NULL; | |
102 | ||
103 | commit = rev_list->item; | |
104 | if (!(commit->object.parsed)) | |
105 | parse_commit(commit); | |
106 | commit->object.flags |= POPPED; | |
107 | if (!(commit->object.flags & COMMON)) | |
108 | non_common_revs--; | |
109 | ||
110 | parents = commit->parents; | |
111 | ||
112 | if (commit->object.flags & COMMON) { | |
113 | /* do not send "have", and ignore ancestors */ | |
114 | commit = NULL; | |
115 | mark = COMMON | SEEN; | |
116 | } else if (commit->object.flags & COMMON_REF) | |
117 | /* send "have", and ignore ancestors */ | |
118 | mark = COMMON | SEEN; | |
119 | else | |
120 | /* send "have", also for its ancestors */ | |
121 | mark = SEEN; | |
122 | ||
123 | while (parents) { | |
124 | if (!(parents->item->object.flags & SEEN)) | |
125 | rev_list_push(parents->item, mark); | |
126 | if (mark & COMMON) | |
127 | mark_common(parents->item, 1, 0); | |
128 | parents = parents->next; | |
129 | } | |
130 | ||
131 | rev_list = rev_list->next; | |
132 | } | |
133 | ||
134 | return commit->object.sha1; | |
135 | } | |
0a8944dd | 136 | |
33b83034 JH |
137 | static int find_common(int fd[2], unsigned char *result_sha1, |
138 | struct ref *refs) | |
def88e9a | 139 | { |
2759cbc7 | 140 | int fetching; |
23d61f83 JS |
141 | int count = 0, flushes = 0, retval; |
142 | const unsigned char *sha1; | |
f061e5fd JH |
143 | unsigned in_vain = 0; |
144 | int got_continue = 0; | |
23d61f83 JS |
145 | |
146 | for_each_ref(rev_list_insert_ref); | |
def88e9a | 147 | |
2759cbc7 LT |
148 | fetching = 0; |
149 | for ( ; refs ; refs = refs->next) { | |
33b83034 | 150 | unsigned char *remote = refs->old_sha1; |
4dab94d5 | 151 | struct object *o; |
2759cbc7 | 152 | |
0a8944dd | 153 | /* |
4dab94d5 JH |
154 | * If that object is complete (i.e. it is an ancestor of a |
155 | * local ref), we tell them we have it but do not have to | |
156 | * tell them about its ancestors, which they already know | |
157 | * about. | |
f1f0a2be JH |
158 | * |
159 | * We use lookup_object here because we are only | |
160 | * interested in the case we *know* the object is | |
161 | * reachable and we have already scanned it. | |
4dab94d5 | 162 | */ |
f1f0a2be | 163 | if (((o = lookup_object(remote)) != NULL) && |
1baaae5e | 164 | (o->flags & COMPLETE)) { |
2759cbc7 | 165 | continue; |
0a8944dd | 166 | } |
23d61f83 | 167 | |
583b7ea3 JH |
168 | if (!fetching) |
169 | packet_write(fd[1], "want %s%s%s%s\n", | |
170 | sha1_to_hex(remote), | |
171 | (multi_ack ? " multi_ack" : ""), | |
172 | (use_sideband ? " side-band" : ""), | |
173 | (use_thin_pack ? " thin-pack" : "")); | |
174 | else | |
175 | packet_write(fd[1], "want %s\n", sha1_to_hex(remote)); | |
2759cbc7 | 176 | fetching++; |
33b83034 | 177 | } |
fb9040cc | 178 | packet_flush(fd[1]); |
2759cbc7 LT |
179 | if (!fetching) |
180 | return 1; | |
0a8944dd | 181 | |
23d61f83 | 182 | flushes = 0; |
75bfc6c2 | 183 | retval = -1; |
23d61f83 | 184 | while ((sha1 = get_rev())) { |
def88e9a | 185 | packet_write(fd[1], "have %s\n", sha1_to_hex(sha1)); |
33b83034 JH |
186 | if (verbose) |
187 | fprintf(stderr, "have %s\n", sha1_to_hex(sha1)); | |
f061e5fd | 188 | in_vain++; |
def88e9a | 189 | if (!(31 & ++count)) { |
c4c86f07 JS |
190 | int ack; |
191 | ||
def88e9a LT |
192 | packet_flush(fd[1]); |
193 | flushes++; | |
194 | ||
195 | /* | |
196 | * We keep one window "ahead" of the other side, and | |
197 | * will wait for an ACK only on the next one | |
198 | */ | |
199 | if (count == 32) | |
200 | continue; | |
c4c86f07 JS |
201 | |
202 | do { | |
203 | ack = get_ack(fd[0], result_sha1); | |
204 | if (verbose && ack) | |
205 | fprintf(stderr, "got ack %d %s\n", ack, | |
206 | sha1_to_hex(result_sha1)); | |
207 | if (ack == 1) { | |
208 | flushes = 0; | |
209 | multi_ack = 0; | |
210 | retval = 0; | |
211 | goto done; | |
212 | } else if (ack == 2) { | |
213 | struct commit *commit = | |
214 | lookup_commit(result_sha1); | |
215 | mark_common(commit, 0, 1); | |
216 | retval = 0; | |
f061e5fd JH |
217 | in_vain = 0; |
218 | got_continue = 1; | |
c4c86f07 JS |
219 | } |
220 | } while (ack); | |
def88e9a | 221 | flushes--; |
f061e5fd JH |
222 | if (got_continue && MAX_IN_VAIN < in_vain) { |
223 | if (verbose) | |
224 | fprintf(stderr, "giving up\n"); | |
225 | break; /* give up */ | |
226 | } | |
def88e9a LT |
227 | } |
228 | } | |
c4c86f07 | 229 | done: |
75bfc6c2 | 230 | packet_write(fd[1], "done\n"); |
33b83034 JH |
231 | if (verbose) |
232 | fprintf(stderr, "done\n"); | |
c4c86f07 JS |
233 | if (retval != 0) { |
234 | multi_ack = 0; | |
23d61f83 | 235 | flushes++; |
c4c86f07 JS |
236 | } |
237 | while (flushes || multi_ack) { | |
238 | int ack = get_ack(fd[0], result_sha1); | |
239 | if (ack) { | |
33b83034 | 240 | if (verbose) |
c4c86f07 JS |
241 | fprintf(stderr, "got ack (%d) %s\n", ack, |
242 | sha1_to_hex(result_sha1)); | |
243 | if (ack == 1) | |
244 | return 0; | |
245 | multi_ack = 1; | |
246 | continue; | |
33b83034 | 247 | } |
c4c86f07 | 248 | flushes--; |
def88e9a | 249 | } |
75bfc6c2 | 250 | return retval; |
def88e9a LT |
251 | } |
252 | ||
49bb805e JH |
253 | static struct commit_list *complete = NULL; |
254 | ||
255 | static int mark_complete(const char *path, const unsigned char *sha1) | |
256 | { | |
257 | struct object *o = parse_object(sha1); | |
258 | ||
885a86ab | 259 | while (o && o->type == TYPE_TAG) { |
f1f0a2be JH |
260 | struct tag *t = (struct tag *) o; |
261 | if (!t->tagged) | |
262 | break; /* broken repository */ | |
49bb805e | 263 | o->flags |= COMPLETE; |
f1f0a2be | 264 | o = parse_object(t->tagged->sha1); |
49bb805e | 265 | } |
885a86ab | 266 | if (o && o->type == TYPE_COMMIT) { |
49bb805e JH |
267 | struct commit *commit = (struct commit *)o; |
268 | commit->object.flags |= COMPLETE; | |
269 | insert_by_date(commit, &complete); | |
270 | } | |
271 | return 0; | |
272 | } | |
273 | ||
274 | static void mark_recent_complete_commits(unsigned long cutoff) | |
275 | { | |
276 | while (complete && cutoff <= complete->item->date) { | |
277 | if (verbose) | |
278 | fprintf(stderr, "Marking %s as complete\n", | |
279 | sha1_to_hex(complete->item->object.sha1)); | |
280 | pop_most_recent_commit(&complete, COMPLETE); | |
281 | } | |
282 | } | |
283 | ||
1baaae5e JS |
284 | static void filter_refs(struct ref **refs, int nr_match, char **match) |
285 | { | |
9546010b JH |
286 | struct ref **return_refs; |
287 | struct ref *newlist = NULL; | |
288 | struct ref **newtail = &newlist; | |
289 | struct ref *ref, *next; | |
290 | struct ref *fastarray[32]; | |
291 | ||
292 | if (nr_match && !fetch_all) { | |
293 | if (ARRAY_SIZE(fastarray) < nr_match) | |
294 | return_refs = xcalloc(nr_match, sizeof(struct ref *)); | |
295 | else { | |
296 | return_refs = fastarray; | |
297 | memset(return_refs, 0, sizeof(struct ref *) * nr_match); | |
298 | } | |
299 | } | |
300 | else | |
301 | return_refs = NULL; | |
302 | ||
303 | for (ref = *refs; ref; ref = next) { | |
304 | next = ref->next; | |
305 | if (!memcmp(ref->name, "refs/", 5) && | |
306 | check_ref_format(ref->name + 5)) | |
307 | ; /* trash */ | |
308 | else if (fetch_all) { | |
309 | *newtail = ref; | |
310 | ref->next = NULL; | |
311 | newtail = &ref->next; | |
312 | continue; | |
313 | } | |
314 | else { | |
315 | int order = path_match(ref->name, nr_match, match); | |
316 | if (order) { | |
317 | return_refs[order-1] = ref; | |
318 | continue; /* we will link it later */ | |
319 | } | |
320 | } | |
321 | free(ref); | |
322 | } | |
323 | ||
324 | if (!fetch_all) { | |
325 | int i; | |
326 | for (i = 0; i < nr_match; i++) { | |
327 | ref = return_refs[i]; | |
328 | if (ref) { | |
329 | *newtail = ref; | |
330 | ref->next = NULL; | |
331 | newtail = &ref->next; | |
332 | } | |
333 | } | |
334 | if (return_refs != fastarray) | |
335 | free(return_refs); | |
1baaae5e | 336 | } |
9546010b | 337 | *refs = newlist; |
1baaae5e JS |
338 | } |
339 | ||
340 | static int everything_local(struct ref **refs, int nr_match, char **match) | |
2759cbc7 | 341 | { |
49bb805e | 342 | struct ref *ref; |
2759cbc7 | 343 | int retval; |
49bb805e JH |
344 | unsigned long cutoff = 0; |
345 | ||
346 | track_object_refs = 0; | |
347 | save_commit_buffer = 0; | |
348 | ||
1baaae5e | 349 | for (ref = *refs; ref; ref = ref->next) { |
49bb805e JH |
350 | struct object *o; |
351 | ||
352 | o = parse_object(ref->old_sha1); | |
353 | if (!o) | |
354 | continue; | |
355 | ||
356 | /* We already have it -- which may mean that we were | |
357 | * in sync with the other side at some time after | |
358 | * that (it is OK if we guess wrong here). | |
359 | */ | |
885a86ab | 360 | if (o->type == TYPE_COMMIT) { |
49bb805e JH |
361 | struct commit *commit = (struct commit *)o; |
362 | if (!cutoff || cutoff < commit->date) | |
363 | cutoff = commit->date; | |
364 | } | |
365 | } | |
366 | ||
367 | for_each_ref(mark_complete); | |
368 | if (cutoff) | |
369 | mark_recent_complete_commits(cutoff); | |
2759cbc7 | 370 | |
1baaae5e JS |
371 | /* |
372 | * Mark all complete remote refs as common refs. | |
373 | * Don't mark them common yet; the server has to be told so first. | |
374 | */ | |
375 | for (ref = *refs; ref; ref = ref->next) { | |
9534f40b JH |
376 | struct object *o = deref_tag(lookup_object(ref->old_sha1), |
377 | NULL, 0); | |
1baaae5e | 378 | |
885a86ab | 379 | if (!o || o->type != TYPE_COMMIT || !(o->flags & COMPLETE)) |
1baaae5e JS |
380 | continue; |
381 | ||
382 | if (!(o->flags & SEEN)) { | |
383 | rev_list_push((struct commit *)o, COMMON_REF | SEEN); | |
384 | ||
385 | mark_common((struct commit *)o, 1, 1); | |
386 | } | |
387 | } | |
388 | ||
389 | filter_refs(refs, nr_match, match); | |
390 | ||
391 | for (retval = 1, ref = *refs; ref ; ref = ref->next) { | |
392 | const unsigned char *remote = ref->old_sha1; | |
2759cbc7 | 393 | unsigned char local[20]; |
49bb805e | 394 | struct object *o; |
2759cbc7 | 395 | |
1baaae5e | 396 | o = lookup_object(remote); |
49bb805e | 397 | if (!o || !(o->flags & COMPLETE)) { |
2759cbc7 LT |
398 | retval = 0; |
399 | if (!verbose) | |
400 | continue; | |
401 | fprintf(stderr, | |
402 | "want %s (%s)\n", sha1_to_hex(remote), | |
1baaae5e | 403 | ref->name); |
2759cbc7 LT |
404 | continue; |
405 | } | |
406 | ||
1baaae5e | 407 | memcpy(ref->new_sha1, local, 20); |
2759cbc7 LT |
408 | if (!verbose) |
409 | continue; | |
410 | fprintf(stderr, | |
411 | "already have %s (%s)\n", sha1_to_hex(remote), | |
1baaae5e | 412 | ref->name); |
2759cbc7 LT |
413 | } |
414 | return retval; | |
415 | } | |
416 | ||
def88e9a LT |
417 | static int fetch_pack(int fd[2], int nr_match, char **match) |
418 | { | |
d1c133f5 LT |
419 | struct ref *ref; |
420 | unsigned char sha1[20]; | |
421 | int status; | |
def88e9a | 422 | |
1baaae5e | 423 | get_remote_heads(fd[0], &ref, 0, NULL, 0); |
c4c86f07 JS |
424 | if (server_supports("multi_ack")) { |
425 | if (verbose) | |
426 | fprintf(stderr, "Server supports multi_ack\n"); | |
427 | multi_ack = 1; | |
428 | } | |
583b7ea3 JH |
429 | if (server_supports("side-band")) { |
430 | if (verbose) | |
431 | fprintf(stderr, "Server supports side-band\n"); | |
432 | use_sideband = 1; | |
433 | } | |
d1c133f5 LT |
434 | if (!ref) { |
435 | packet_flush(fd[1]); | |
436 | die("no matching remote head"); | |
437 | } | |
1baaae5e | 438 | if (everything_local(&ref, nr_match, match)) { |
2759cbc7 LT |
439 | packet_flush(fd[1]); |
440 | goto all_done; | |
441 | } | |
33b83034 | 442 | if (find_common(fd, sha1, ref) < 0) |
dfeff66e JH |
443 | if (!keep_pack) |
444 | /* When cloning, it is not unusual to have | |
445 | * no common commit. | |
446 | */ | |
447 | fprintf(stderr, "warning: no common commits\n"); | |
ad897215 JH |
448 | |
449 | if (keep_pack) | |
583b7ea3 | 450 | status = receive_keep_pack(fd, "git-fetch-pack", quiet, use_sideband); |
ad897215 | 451 | else |
583b7ea3 | 452 | status = receive_unpack_pack(fd, "git-fetch-pack", quiet, use_sideband); |
ad897215 JH |
453 | |
454 | if (status) | |
455 | die("git-fetch-pack: fetch failed."); | |
456 | ||
457 | all_done: | |
458 | while (ref) { | |
459 | printf("%s %s\n", | |
460 | sha1_to_hex(ref->old_sha1), ref->name); | |
461 | ref = ref->next; | |
75bfc6c2 | 462 | } |
ad897215 | 463 | return 0; |
def88e9a LT |
464 | } |
465 | ||
466 | int main(int argc, char **argv) | |
467 | { | |
468 | int i, ret, nr_heads; | |
469 | char *dest = NULL, **heads; | |
470 | int fd[2]; | |
471 | pid_t pid; | |
472 | ||
5a327713 JH |
473 | setup_git_directory(); |
474 | ||
def88e9a LT |
475 | nr_heads = 0; |
476 | heads = NULL; | |
477 | for (i = 1; i < argc; i++) { | |
478 | char *arg = argv[i]; | |
479 | ||
480 | if (*arg == '-') { | |
8b3d9dc0 JH |
481 | if (!strncmp("--exec=", arg, 7)) { |
482 | exec = arg + 7; | |
483 | continue; | |
484 | } | |
2247efb4 | 485 | if (!strcmp("--quiet", arg) || !strcmp("-q", arg)) { |
33b83034 JH |
486 | quiet = 1; |
487 | continue; | |
488 | } | |
2247efb4 | 489 | if (!strcmp("--keep", arg) || !strcmp("-k", arg)) { |
ad897215 JH |
490 | keep_pack = 1; |
491 | continue; | |
492 | } | |
b19696c2 JH |
493 | if (!strcmp("--thin", arg)) { |
494 | use_thin_pack = 1; | |
495 | continue; | |
496 | } | |
dfeff66e JH |
497 | if (!strcmp("--all", arg)) { |
498 | fetch_all = 1; | |
499 | continue; | |
500 | } | |
33b83034 JH |
501 | if (!strcmp("-v", arg)) { |
502 | verbose = 1; | |
503 | continue; | |
504 | } | |
def88e9a LT |
505 | usage(fetch_pack_usage); |
506 | } | |
507 | dest = arg; | |
508 | heads = argv + i + 1; | |
509 | nr_heads = argc - i - 1; | |
510 | break; | |
511 | } | |
512 | if (!dest) | |
513 | usage(fetch_pack_usage); | |
b19696c2 JH |
514 | if (keep_pack) |
515 | use_thin_pack = 0; | |
def88e9a LT |
516 | pid = git_connect(fd, dest, exec); |
517 | if (pid < 0) | |
518 | return 1; | |
519 | ret = fetch_pack(fd, nr_heads, heads); | |
520 | close(fd[0]); | |
521 | close(fd[1]); | |
522 | finish_connect(pid); | |
9e5d2b40 JH |
523 | |
524 | if (!ret && nr_heads) { | |
525 | /* If the heads to pull were given, we should have | |
526 | * consumed all of them by matching the remote. | |
527 | * Otherwise, 'git-fetch remote no-such-ref' would | |
528 | * silently succeed without issuing an error. | |
529 | */ | |
530 | for (i = 0; i < nr_heads; i++) | |
531 | if (heads[i] && heads[i][0]) { | |
532 | error("no such remote ref %s", heads[i]); | |
533 | ret = 1; | |
534 | } | |
535 | } | |
536 | ||
def88e9a LT |
537 | return ret; |
538 | } |