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