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53a50892 DS |
1 | #include "cache.h" |
2 | #include "bundle-uri.h" | |
3 | #include "bundle.h" | |
32a8f510 | 4 | #include "environment.h" |
f394e093 | 5 | #include "gettext.h" |
53a50892 DS |
6 | #include "object-store.h" |
7 | #include "refs.h" | |
8 | #include "run-command.h" | |
0634f717 DS |
9 | #include "hashmap.h" |
10 | #include "pkt-line.h" | |
bff03c47 | 11 | #include "config.h" |
ebc39479 | 12 | #include "remote.h" |
0634f717 | 13 | |
c93c3d2f DS |
14 | static struct { |
15 | enum bundle_list_heuristic heuristic; | |
16 | const char *name; | |
17 | } heuristics[BUNDLE_HEURISTIC__COUNT] = { | |
18 | { BUNDLE_HEURISTIC_NONE, ""}, | |
19 | { BUNDLE_HEURISTIC_CREATIONTOKEN, "creationToken" }, | |
20 | }; | |
21 | ||
0634f717 DS |
22 | static int compare_bundles(const void *hashmap_cmp_fn_data, |
23 | const struct hashmap_entry *he1, | |
24 | const struct hashmap_entry *he2, | |
25 | const void *id) | |
26 | { | |
27 | const struct remote_bundle_info *e1 = | |
28 | container_of(he1, const struct remote_bundle_info, ent); | |
29 | const struct remote_bundle_info *e2 = | |
30 | container_of(he2, const struct remote_bundle_info, ent); | |
31 | ||
32 | return strcmp(e1->id, id ? (const char *)id : e2->id); | |
33 | } | |
34 | ||
35 | void init_bundle_list(struct bundle_list *list) | |
36 | { | |
37 | memset(list, 0, sizeof(*list)); | |
38 | ||
39 | /* Implied defaults. */ | |
40 | list->mode = BUNDLE_MODE_ALL; | |
41 | list->version = 1; | |
42 | ||
43 | hashmap_init(&list->bundles, compare_bundles, NULL, 0); | |
44 | } | |
45 | ||
46 | static int clear_remote_bundle_info(struct remote_bundle_info *bundle, | |
47 | void *data) | |
48 | { | |
49 | FREE_AND_NULL(bundle->id); | |
50 | FREE_AND_NULL(bundle->uri); | |
c23f5921 DS |
51 | FREE_AND_NULL(bundle->file); |
52 | bundle->unbundled = 0; | |
0634f717 DS |
53 | return 0; |
54 | } | |
55 | ||
56 | void clear_bundle_list(struct bundle_list *list) | |
57 | { | |
58 | if (!list) | |
59 | return; | |
60 | ||
61 | for_all_bundles_in_list(list, clear_remote_bundle_info, NULL); | |
62 | hashmap_clear_and_free(&list->bundles, struct remote_bundle_info, ent); | |
ebc39479 | 63 | free(list->baseURI); |
0634f717 DS |
64 | } |
65 | ||
66 | int for_all_bundles_in_list(struct bundle_list *list, | |
67 | bundle_iterator iter, | |
68 | void *data) | |
69 | { | |
70 | struct remote_bundle_info *info; | |
71 | struct hashmap_iter i; | |
72 | ||
73 | hashmap_for_each_entry(&list->bundles, &i, info, ent) { | |
74 | int result = iter(info, data); | |
75 | ||
76 | if (result) | |
77 | return result; | |
78 | } | |
79 | ||
80 | return 0; | |
81 | } | |
53a50892 | 82 | |
d796cedb ÆAB |
83 | static int summarize_bundle(struct remote_bundle_info *info, void *data) |
84 | { | |
85 | FILE *fp = data; | |
86 | fprintf(fp, "[bundle \"%s\"]\n", info->id); | |
87 | fprintf(fp, "\turi = %s\n", info->uri); | |
512fccf8 DS |
88 | |
89 | if (info->creationToken) | |
90 | fprintf(fp, "\tcreationToken = %"PRIu64"\n", info->creationToken); | |
d796cedb ÆAB |
91 | return 0; |
92 | } | |
93 | ||
94 | void print_bundle_list(FILE *fp, struct bundle_list *list) | |
95 | { | |
96 | const char *mode; | |
97 | ||
98 | switch (list->mode) { | |
99 | case BUNDLE_MODE_ALL: | |
100 | mode = "all"; | |
101 | break; | |
102 | ||
103 | case BUNDLE_MODE_ANY: | |
104 | mode = "any"; | |
105 | break; | |
106 | ||
107 | case BUNDLE_MODE_NONE: | |
108 | default: | |
109 | mode = "<unknown>"; | |
110 | } | |
111 | ||
112 | fprintf(fp, "[bundle]\n"); | |
113 | fprintf(fp, "\tversion = %d\n", list->version); | |
114 | fprintf(fp, "\tmode = %s\n", mode); | |
115 | ||
c93c3d2f DS |
116 | if (list->heuristic) { |
117 | int i; | |
118 | for (i = 0; i < BUNDLE_HEURISTIC__COUNT; i++) { | |
119 | if (heuristics[i].heuristic == list->heuristic) { | |
120 | printf("\theuristic = %s\n", | |
121 | heuristics[list->heuristic].name); | |
122 | break; | |
123 | } | |
124 | } | |
125 | } | |
126 | ||
d796cedb ÆAB |
127 | for_all_bundles_in_list(list, summarize_bundle, fp); |
128 | } | |
129 | ||
bff03c47 DS |
130 | /** |
131 | * Given a key-value pair, update the state of the given bundle list. | |
132 | * Returns 0 if the key-value pair is understood. Returns -1 if the key | |
133 | * is not understood or the value is malformed. | |
134 | */ | |
bff03c47 DS |
135 | static int bundle_list_update(const char *key, const char *value, |
136 | struct bundle_list *list) | |
137 | { | |
138 | struct strbuf id = STRBUF_INIT; | |
139 | struct remote_bundle_info lookup = REMOTE_BUNDLE_INFO_INIT; | |
140 | struct remote_bundle_info *bundle; | |
141 | const char *subsection, *subkey; | |
142 | size_t subsection_len; | |
143 | ||
144 | if (parse_config_key(key, "bundle", &subsection, &subsection_len, &subkey)) | |
145 | return -1; | |
146 | ||
147 | if (!subsection_len) { | |
148 | if (!strcmp(subkey, "version")) { | |
149 | int version; | |
150 | if (!git_parse_int(value, &version)) | |
151 | return -1; | |
152 | if (version != 1) | |
153 | return -1; | |
154 | ||
155 | list->version = version; | |
156 | return 0; | |
157 | } | |
158 | ||
159 | if (!strcmp(subkey, "mode")) { | |
160 | if (!strcmp(value, "all")) | |
161 | list->mode = BUNDLE_MODE_ALL; | |
162 | else if (!strcmp(value, "any")) | |
163 | list->mode = BUNDLE_MODE_ANY; | |
164 | else | |
165 | return -1; | |
166 | return 0; | |
167 | } | |
168 | ||
c93c3d2f DS |
169 | if (!strcmp(subkey, "heuristic")) { |
170 | int i; | |
171 | for (i = 0; i < BUNDLE_HEURISTIC__COUNT; i++) { | |
172 | if (heuristics[i].heuristic && | |
173 | heuristics[i].name && | |
174 | !strcmp(value, heuristics[i].name)) { | |
175 | list->heuristic = heuristics[i].heuristic; | |
176 | return 0; | |
177 | } | |
178 | } | |
179 | ||
180 | /* Ignore unknown heuristics. */ | |
181 | return 0; | |
182 | } | |
183 | ||
bff03c47 DS |
184 | /* Ignore other unknown global keys. */ |
185 | return 0; | |
186 | } | |
187 | ||
188 | strbuf_add(&id, subsection, subsection_len); | |
189 | ||
190 | /* | |
191 | * Check for an existing bundle with this <id>, or create one | |
192 | * if necessary. | |
193 | */ | |
194 | lookup.id = id.buf; | |
195 | hashmap_entry_init(&lookup.ent, strhash(lookup.id)); | |
196 | if (!(bundle = hashmap_get_entry(&list->bundles, &lookup, ent, NULL))) { | |
197 | CALLOC_ARRAY(bundle, 1); | |
198 | bundle->id = strbuf_detach(&id, NULL); | |
199 | hashmap_entry_init(&bundle->ent, strhash(bundle->id)); | |
200 | hashmap_add(&list->bundles, &bundle->ent); | |
201 | } | |
202 | strbuf_release(&id); | |
203 | ||
204 | if (!strcmp(subkey, "uri")) { | |
205 | if (bundle->uri) | |
206 | return -1; | |
ebc39479 | 207 | bundle->uri = relative_url(list->baseURI, value, NULL); |
bff03c47 DS |
208 | return 0; |
209 | } | |
210 | ||
512fccf8 DS |
211 | if (!strcmp(subkey, "creationtoken")) { |
212 | if (sscanf(value, "%"PRIu64, &bundle->creationToken) != 1) | |
213 | warning(_("could not parse bundle list key %s with value '%s'"), | |
214 | "creationToken", value); | |
215 | return 0; | |
216 | } | |
217 | ||
bff03c47 DS |
218 | /* |
219 | * At this point, we ignore any information that we don't | |
220 | * understand, assuming it to be hints for a heuristic the client | |
221 | * does not currently understand. | |
222 | */ | |
223 | return 0; | |
224 | } | |
225 | ||
738e5245 DS |
226 | static int config_to_bundle_list(const char *key, const char *value, void *data) |
227 | { | |
228 | struct bundle_list *list = data; | |
229 | return bundle_list_update(key, value, list); | |
230 | } | |
231 | ||
232 | int bundle_uri_parse_config_format(const char *uri, | |
233 | const char *filename, | |
234 | struct bundle_list *list) | |
235 | { | |
236 | int result; | |
237 | struct config_options opts = { | |
238 | .error_action = CONFIG_ERROR_ERROR, | |
239 | }; | |
240 | ||
ebc39479 DS |
241 | if (!list->baseURI) { |
242 | struct strbuf baseURI = STRBUF_INIT; | |
243 | strbuf_addstr(&baseURI, uri); | |
244 | ||
245 | /* | |
246 | * If the URI does not end with a trailing slash, then | |
247 | * remove the filename portion of the path. This is | |
248 | * important for relative URIs. | |
249 | */ | |
250 | strbuf_strip_file_from_path(&baseURI); | |
251 | list->baseURI = strbuf_detach(&baseURI, NULL); | |
252 | } | |
738e5245 DS |
253 | result = git_config_from_file_with_options(config_to_bundle_list, |
254 | filename, list, | |
255 | &opts); | |
256 | ||
257 | if (!result && list->mode == BUNDLE_MODE_NONE) { | |
258 | warning(_("bundle list at '%s' has no mode"), uri); | |
259 | result = 1; | |
260 | } | |
261 | ||
262 | return result; | |
263 | } | |
264 | ||
23b6d00b | 265 | static char *find_temp_filename(void) |
53a50892 DS |
266 | { |
267 | int fd; | |
23b6d00b | 268 | struct strbuf name = STRBUF_INIT; |
53a50892 DS |
269 | /* |
270 | * Find a temporary filename that is available. This is briefly | |
271 | * racy, but unlikely to collide. | |
272 | */ | |
23b6d00b | 273 | fd = odb_mkstemp(&name, "bundles/tmp_uri_XXXXXX"); |
53a50892 DS |
274 | if (fd < 0) { |
275 | warning(_("failed to create temporary file")); | |
23b6d00b | 276 | return NULL; |
53a50892 DS |
277 | } |
278 | ||
279 | close(fd); | |
23b6d00b DS |
280 | unlink(name.buf); |
281 | return strbuf_detach(&name, NULL); | |
53a50892 DS |
282 | } |
283 | ||
59c1752a | 284 | static int download_https_uri_to_file(const char *file, const char *uri) |
53a50892 | 285 | { |
59c1752a DS |
286 | int result = 0; |
287 | struct child_process cp = CHILD_PROCESS_INIT; | |
288 | FILE *child_in = NULL, *child_out = NULL; | |
289 | struct strbuf line = STRBUF_INIT; | |
290 | int found_get = 0; | |
291 | ||
292 | strvec_pushl(&cp.args, "git-remote-https", uri, NULL); | |
8628a842 | 293 | cp.err = -1; |
59c1752a DS |
294 | cp.in = -1; |
295 | cp.out = -1; | |
296 | ||
297 | if (start_command(&cp)) | |
298 | return 1; | |
299 | ||
300 | child_in = fdopen(cp.in, "w"); | |
301 | if (!child_in) { | |
302 | result = 1; | |
303 | goto cleanup; | |
304 | } | |
305 | ||
306 | child_out = fdopen(cp.out, "r"); | |
307 | if (!child_out) { | |
308 | result = 1; | |
309 | goto cleanup; | |
310 | } | |
311 | ||
312 | fprintf(child_in, "capabilities\n"); | |
313 | fflush(child_in); | |
314 | ||
315 | while (!strbuf_getline(&line, child_out)) { | |
316 | if (!line.len) | |
317 | break; | |
318 | if (!strcmp(line.buf, "get")) | |
319 | found_get = 1; | |
320 | } | |
321 | strbuf_release(&line); | |
322 | ||
323 | if (!found_get) { | |
324 | result = error(_("insufficient capabilities")); | |
325 | goto cleanup; | |
326 | } | |
327 | ||
328 | fprintf(child_in, "get %s %s\n\n", uri, file); | |
329 | ||
330 | cleanup: | |
331 | if (child_in) | |
332 | fclose(child_in); | |
333 | if (finish_command(&cp)) | |
334 | return 1; | |
335 | if (child_out) | |
336 | fclose(child_out); | |
337 | return result; | |
338 | } | |
339 | ||
340 | static int copy_uri_to_file(const char *filename, const char *uri) | |
341 | { | |
342 | const char *out; | |
343 | ||
344 | if (starts_with(uri, "https:") || | |
345 | starts_with(uri, "http:")) | |
346 | return download_https_uri_to_file(filename, uri); | |
347 | ||
348 | if (skip_prefix(uri, "file://", &out)) | |
349 | uri = out; | |
350 | ||
351 | /* Copy as a file */ | |
352 | return copy_file(filename, uri, 0); | |
53a50892 DS |
353 | } |
354 | ||
355 | static int unbundle_from_file(struct repository *r, const char *file) | |
356 | { | |
357 | int result = 0; | |
358 | int bundle_fd; | |
359 | struct bundle_header header = BUNDLE_HEADER_INIT; | |
360 | struct string_list_item *refname; | |
361 | struct strbuf bundle_ref = STRBUF_INIT; | |
362 | size_t bundle_prefix_len; | |
363 | ||
364 | if ((bundle_fd = read_bundle_header(file, &header)) < 0) | |
365 | return 1; | |
366 | ||
89bd7fed DS |
367 | /* |
368 | * Skip the reachability walk here, since we will be adding | |
369 | * a reachable ref pointing to the new tips, which will reach | |
370 | * the prerequisite commits. | |
371 | */ | |
70334fc3 DS |
372 | if ((result = unbundle(r, &header, bundle_fd, NULL, |
373 | VERIFY_BUNDLE_QUIET))) | |
53a50892 DS |
374 | return 1; |
375 | ||
376 | /* | |
377 | * Convert all refs/heads/ from the bundle into refs/bundles/ | |
378 | * in the local repository. | |
379 | */ | |
380 | strbuf_addstr(&bundle_ref, "refs/bundles/"); | |
381 | bundle_prefix_len = bundle_ref.len; | |
382 | ||
383 | for_each_string_list_item(refname, &header.references) { | |
384 | struct object_id *oid = refname->util; | |
385 | struct object_id old_oid; | |
386 | const char *branch_name; | |
387 | int has_old; | |
388 | ||
389 | if (!skip_prefix(refname->string, "refs/heads/", &branch_name)) | |
390 | continue; | |
391 | ||
392 | strbuf_setlen(&bundle_ref, bundle_prefix_len); | |
393 | strbuf_addstr(&bundle_ref, branch_name); | |
394 | ||
395 | has_old = !read_ref(bundle_ref.buf, &old_oid); | |
396 | update_ref("fetched bundle", bundle_ref.buf, oid, | |
397 | has_old ? &old_oid : NULL, | |
398 | REF_SKIP_OID_VERIFICATION, | |
399 | UPDATE_REFS_MSG_ON_ERR); | |
400 | } | |
401 | ||
402 | bundle_header_release(&header); | |
403 | return result; | |
404 | } | |
405 | ||
c23f5921 DS |
406 | struct bundle_list_context { |
407 | struct repository *r; | |
408 | struct bundle_list *list; | |
409 | enum bundle_list_mode mode; | |
410 | int count; | |
411 | int depth; | |
412 | }; | |
413 | ||
414 | /* | |
415 | * This early definition is necessary because we use indirect recursion: | |
416 | * | |
417 | * While iterating through a bundle list that was downloaded as part | |
418 | * of fetch_bundle_uri_internal(), iterator methods eventually call it | |
419 | * again, but with depth + 1. | |
420 | */ | |
421 | static int fetch_bundle_uri_internal(struct repository *r, | |
422 | struct remote_bundle_info *bundle, | |
423 | int depth, | |
424 | struct bundle_list *list); | |
425 | ||
426 | static int download_bundle_to_file(struct remote_bundle_info *bundle, void *data) | |
427 | { | |
428 | int res; | |
429 | struct bundle_list_context *ctx = data; | |
430 | ||
431 | if (ctx->mode == BUNDLE_MODE_ANY && ctx->count) | |
432 | return 0; | |
433 | ||
434 | res = fetch_bundle_uri_internal(ctx->r, bundle, ctx->depth + 1, ctx->list); | |
435 | ||
436 | /* | |
437 | * Only increment count if the download succeeded. If our mode is | |
438 | * BUNDLE_MODE_ANY, then we will want to try other URIs in the | |
439 | * list in case they work instead. | |
440 | */ | |
441 | if (!res) | |
442 | ctx->count++; | |
443 | ||
444 | /* | |
445 | * To be opportunistic as possible, we continue iterating and | |
446 | * download as many bundles as we can, so we can apply the ones | |
447 | * that work, even in BUNDLE_MODE_ALL mode. | |
448 | */ | |
449 | return 0; | |
450 | } | |
451 | ||
7903efb7 DS |
452 | struct bundles_for_sorting { |
453 | struct remote_bundle_info **items; | |
454 | size_t alloc; | |
455 | size_t nr; | |
456 | }; | |
457 | ||
458 | static int append_bundle(struct remote_bundle_info *bundle, void *data) | |
459 | { | |
460 | struct bundles_for_sorting *list = data; | |
461 | list->items[list->nr++] = bundle; | |
462 | return 0; | |
463 | } | |
464 | ||
465 | /** | |
466 | * For use in QSORT() to get a list sorted by creationToken | |
467 | * in decreasing order. | |
468 | */ | |
469 | static int compare_creation_token_decreasing(const void *va, const void *vb) | |
470 | { | |
471 | const struct remote_bundle_info * const *a = va; | |
472 | const struct remote_bundle_info * const *b = vb; | |
473 | ||
474 | if ((*a)->creationToken > (*b)->creationToken) | |
475 | return -1; | |
476 | if ((*a)->creationToken < (*b)->creationToken) | |
477 | return 1; | |
478 | return 0; | |
479 | } | |
480 | ||
481 | static int fetch_bundles_by_token(struct repository *r, | |
482 | struct bundle_list *list) | |
483 | { | |
484 | int cur; | |
485 | int move_direction = 0; | |
c429bed1 DS |
486 | const char *creationTokenStr; |
487 | uint64_t maxCreationToken = 0, newMaxCreationToken = 0; | |
7903efb7 DS |
488 | struct bundle_list_context ctx = { |
489 | .r = r, | |
490 | .list = list, | |
491 | .mode = list->mode, | |
492 | }; | |
493 | struct bundles_for_sorting bundles = { | |
494 | .alloc = hashmap_get_size(&list->bundles), | |
495 | }; | |
496 | ||
497 | ALLOC_ARRAY(bundles.items, bundles.alloc); | |
498 | ||
499 | for_all_bundles_in_list(list, append_bundle, &bundles); | |
500 | ||
c429bed1 DS |
501 | if (!bundles.nr) { |
502 | free(bundles.items); | |
503 | return 0; | |
504 | } | |
505 | ||
7903efb7 DS |
506 | QSORT(bundles.items, bundles.nr, compare_creation_token_decreasing); |
507 | ||
c429bed1 DS |
508 | /* |
509 | * If fetch.bundleCreationToken exists, parses to a uint64t, and | |
510 | * is not strictly smaller than the maximum creation token in the | |
511 | * bundle list, then do not download any bundles. | |
512 | */ | |
513 | if (!repo_config_get_value(r, | |
514 | "fetch.bundlecreationtoken", | |
515 | &creationTokenStr) && | |
516 | sscanf(creationTokenStr, "%"PRIu64, &maxCreationToken) == 1 && | |
517 | bundles.items[0]->creationToken <= maxCreationToken) { | |
518 | free(bundles.items); | |
519 | return 0; | |
520 | } | |
521 | ||
7903efb7 DS |
522 | /* |
523 | * Attempt to download and unbundle the minimum number of bundles by | |
524 | * creationToken in decreasing order. If we fail to unbundle (after | |
525 | * a successful download) then move to the next non-downloaded bundle | |
526 | * and attempt downloading. Once we succeed in applying a bundle, | |
527 | * move to the previous unapplied bundle and attempt to unbundle it | |
528 | * again. | |
529 | * | |
530 | * In the case of a fresh clone, we will likely download all of the | |
531 | * bundles before successfully unbundling the oldest one, then the | |
532 | * rest of the bundles unbundle successfully in increasing order | |
533 | * of creationToken. | |
534 | * | |
535 | * If there are existing objects, then this process may terminate | |
536 | * early when all required commits from "new" bundles exist in the | |
537 | * repo's object store. | |
538 | */ | |
539 | cur = 0; | |
540 | while (cur >= 0 && cur < bundles.nr) { | |
541 | struct remote_bundle_info *bundle = bundles.items[cur]; | |
c429bed1 DS |
542 | |
543 | /* | |
544 | * If we need to dig into bundles below the previous | |
545 | * creation token value, then likely we are in an erroneous | |
546 | * state due to missing or invalid bundles. Halt the process | |
547 | * instead of continuing to download extra data. | |
548 | */ | |
549 | if (bundle->creationToken <= maxCreationToken) | |
550 | break; | |
551 | ||
7903efb7 DS |
552 | if (!bundle->file) { |
553 | /* | |
554 | * Not downloaded yet. Try downloading. | |
555 | * | |
556 | * Note that bundle->file is non-NULL if a download | |
557 | * was attempted, even if it failed to download. | |
558 | */ | |
559 | if (fetch_bundle_uri_internal(ctx.r, bundle, ctx.depth + 1, ctx.list)) { | |
560 | /* Mark as unbundled so we do not retry. */ | |
561 | bundle->unbundled = 1; | |
562 | ||
563 | /* Try looking deeper in the list. */ | |
564 | move_direction = 1; | |
565 | goto move; | |
566 | } | |
567 | ||
568 | /* We expect bundles when using creationTokens. */ | |
569 | if (!is_bundle(bundle->file, 1)) { | |
570 | warning(_("file downloaded from '%s' is not a bundle"), | |
571 | bundle->uri); | |
572 | break; | |
573 | } | |
574 | } | |
575 | ||
576 | if (bundle->file && !bundle->unbundled) { | |
577 | /* | |
578 | * This was downloaded, but not successfully | |
579 | * unbundled. Try unbundling again. | |
580 | */ | |
581 | if (unbundle_from_file(ctx.r, bundle->file)) { | |
582 | /* Try looking deeper in the list. */ | |
583 | move_direction = 1; | |
584 | } else { | |
585 | /* | |
586 | * Succeeded in unbundle. Retry bundles | |
587 | * that previously failed to unbundle. | |
588 | */ | |
589 | move_direction = -1; | |
590 | bundle->unbundled = 1; | |
c429bed1 DS |
591 | |
592 | if (bundle->creationToken > newMaxCreationToken) | |
593 | newMaxCreationToken = bundle->creationToken; | |
7903efb7 DS |
594 | } |
595 | } | |
596 | ||
597 | /* | |
598 | * Else case: downloaded and unbundled successfully. | |
599 | * Skip this by moving in the same direction as the | |
600 | * previous step. | |
601 | */ | |
602 | ||
603 | move: | |
604 | /* Move in the specified direction and repeat. */ | |
605 | cur += move_direction; | |
606 | } | |
607 | ||
7903efb7 DS |
608 | /* |
609 | * We succeed if the loop terminates because 'cur' drops below | |
610 | * zero. The other case is that we terminate because 'cur' | |
611 | * reaches the end of the list, so we have a failure no matter | |
612 | * which bundles we apply from the list. | |
613 | */ | |
c429bed1 DS |
614 | if (cur < 0) { |
615 | struct strbuf value = STRBUF_INIT; | |
616 | strbuf_addf(&value, "%"PRIu64"", newMaxCreationToken); | |
617 | if (repo_config_set_multivar_gently(ctx.r, | |
618 | "fetch.bundleCreationToken", | |
619 | value.buf, NULL, 0)) | |
620 | warning(_("failed to store maximum creation token")); | |
621 | ||
622 | strbuf_release(&value); | |
623 | } | |
624 | ||
625 | free(bundles.items); | |
7903efb7 DS |
626 | return cur >= 0; |
627 | } | |
628 | ||
c23f5921 DS |
629 | static int download_bundle_list(struct repository *r, |
630 | struct bundle_list *local_list, | |
631 | struct bundle_list *global_list, | |
632 | int depth) | |
633 | { | |
634 | struct bundle_list_context ctx = { | |
635 | .r = r, | |
636 | .list = global_list, | |
637 | .depth = depth + 1, | |
638 | .mode = local_list->mode, | |
639 | }; | |
640 | ||
641 | return for_all_bundles_in_list(local_list, download_bundle_to_file, &ctx); | |
642 | } | |
643 | ||
644 | static int fetch_bundle_list_in_config_format(struct repository *r, | |
645 | struct bundle_list *global_list, | |
646 | struct remote_bundle_info *bundle, | |
647 | int depth) | |
648 | { | |
649 | int result; | |
650 | struct bundle_list list_from_bundle; | |
651 | ||
652 | init_bundle_list(&list_from_bundle); | |
653 | ||
654 | if ((result = bundle_uri_parse_config_format(bundle->uri, | |
655 | bundle->file, | |
656 | &list_from_bundle))) | |
657 | goto cleanup; | |
658 | ||
659 | if (list_from_bundle.mode == BUNDLE_MODE_NONE) { | |
660 | warning(_("unrecognized bundle mode from URI '%s'"), | |
661 | bundle->uri); | |
662 | result = -1; | |
663 | goto cleanup; | |
664 | } | |
665 | ||
7903efb7 DS |
666 | /* |
667 | * If this list uses the creationToken heuristic, then the URIs | |
668 | * it advertises are expected to be bundles, not nested lists. | |
669 | * We can drop 'global_list' and 'depth'. | |
670 | */ | |
671 | if (list_from_bundle.heuristic == BUNDLE_HEURISTIC_CREATIONTOKEN) { | |
672 | result = fetch_bundles_by_token(r, &list_from_bundle); | |
673 | global_list->heuristic = BUNDLE_HEURISTIC_CREATIONTOKEN; | |
674 | } else if ((result = download_bundle_list(r, &list_from_bundle, | |
c23f5921 DS |
675 | global_list, depth))) |
676 | goto cleanup; | |
677 | ||
678 | cleanup: | |
679 | clear_bundle_list(&list_from_bundle); | |
680 | return result; | |
681 | } | |
682 | ||
20c1e2a6 DS |
683 | /** |
684 | * This limits the recursion on fetch_bundle_uri_internal() when following | |
685 | * bundle lists. | |
686 | */ | |
687 | static int max_bundle_uri_depth = 4; | |
688 | ||
c23f5921 DS |
689 | /** |
690 | * Recursively download all bundles advertised at the given URI | |
691 | * to files. If the file is a bundle, then add it to the given | |
692 | * 'list'. Otherwise, expect a bundle list and recurse on the | |
693 | * URIs in that list according to the list mode (ANY or ALL). | |
694 | */ | |
20c1e2a6 | 695 | static int fetch_bundle_uri_internal(struct repository *r, |
c23f5921 DS |
696 | struct remote_bundle_info *bundle, |
697 | int depth, | |
698 | struct bundle_list *list) | |
53a50892 DS |
699 | { |
700 | int result = 0; | |
c23f5921 | 701 | struct remote_bundle_info *bcopy; |
53a50892 | 702 | |
20c1e2a6 DS |
703 | if (depth >= max_bundle_uri_depth) { |
704 | warning(_("exceeded bundle URI recursion limit (%d)"), | |
705 | max_bundle_uri_depth); | |
706 | return -1; | |
707 | } | |
708 | ||
c23f5921 DS |
709 | if (!bundle->file && |
710 | !(bundle->file = find_temp_filename())) { | |
23b6d00b | 711 | result = -1; |
53a50892 | 712 | goto cleanup; |
23b6d00b | 713 | } |
53a50892 | 714 | |
c23f5921 DS |
715 | if ((result = copy_uri_to_file(bundle->file, bundle->uri))) { |
716 | warning(_("failed to download bundle from URI '%s'"), bundle->uri); | |
53a50892 DS |
717 | goto cleanup; |
718 | } | |
719 | ||
c23f5921 DS |
720 | if ((result = !is_bundle(bundle->file, 1))) { |
721 | result = fetch_bundle_list_in_config_format( | |
722 | r, list, bundle, depth); | |
723 | if (result) | |
724 | warning(_("file at URI '%s' is not a bundle or bundle list"), | |
725 | bundle->uri); | |
53a50892 DS |
726 | goto cleanup; |
727 | } | |
728 | ||
c23f5921 DS |
729 | /* Copy the bundle and insert it into the global list. */ |
730 | CALLOC_ARRAY(bcopy, 1); | |
731 | bcopy->id = xstrdup(bundle->id); | |
732 | bcopy->file = xstrdup(bundle->file); | |
733 | hashmap_entry_init(&bcopy->ent, strhash(bcopy->id)); | |
734 | hashmap_add(&list->bundles, &bcopy->ent); | |
53a50892 DS |
735 | |
736 | cleanup: | |
c23f5921 DS |
737 | if (result && bundle->file) |
738 | unlink(bundle->file); | |
53a50892 DS |
739 | return result; |
740 | } | |
9424e373 | 741 | |
c23f5921 DS |
742 | /** |
743 | * This loop iterator breaks the loop with nonzero return code on the | |
744 | * first successful unbundling of a bundle. | |
745 | */ | |
746 | static int attempt_unbundle(struct remote_bundle_info *info, void *data) | |
747 | { | |
748 | struct repository *r = data; | |
749 | ||
750 | if (!info->file || info->unbundled) | |
751 | return 0; | |
752 | ||
753 | if (!unbundle_from_file(r, info->file)) { | |
754 | info->unbundled = 1; | |
755 | return 1; | |
756 | } | |
757 | ||
758 | return 0; | |
759 | } | |
760 | ||
761 | static int unbundle_all_bundles(struct repository *r, | |
762 | struct bundle_list *list) | |
763 | { | |
764 | /* | |
765 | * Iterate through all bundles looking for ones that can | |
766 | * successfully unbundle. If any succeed, then perhaps another | |
767 | * will succeed in the next attempt. | |
768 | * | |
769 | * Keep in mind that a non-zero result for the loop here means | |
770 | * the loop terminated early on a successful unbundling, which | |
771 | * signals that we can try again. | |
772 | */ | |
773 | while (for_all_bundles_in_list(list, attempt_unbundle, r)) ; | |
774 | ||
775 | return 0; | |
776 | } | |
777 | ||
778 | static int unlink_bundle(struct remote_bundle_info *info, void *data) | |
779 | { | |
780 | if (info->file) | |
781 | unlink_or_warn(info->file); | |
782 | return 0; | |
783 | } | |
784 | ||
4074d3c7 DS |
785 | int fetch_bundle_uri(struct repository *r, const char *uri, |
786 | int *has_heuristic) | |
20c1e2a6 | 787 | { |
c23f5921 DS |
788 | int result; |
789 | struct bundle_list list; | |
790 | struct remote_bundle_info bundle = { | |
791 | .uri = xstrdup(uri), | |
792 | .id = xstrdup(""), | |
793 | }; | |
794 | ||
795 | init_bundle_list(&list); | |
796 | ||
797 | /* If a bundle is added to this global list, then it is required. */ | |
798 | list.mode = BUNDLE_MODE_ALL; | |
799 | ||
800 | if ((result = fetch_bundle_uri_internal(r, &bundle, 0, &list))) | |
801 | goto cleanup; | |
802 | ||
803 | result = unbundle_all_bundles(r, &list); | |
804 | ||
805 | cleanup: | |
4074d3c7 DS |
806 | if (has_heuristic) |
807 | *has_heuristic = (list.heuristic != BUNDLE_HEURISTIC_NONE); | |
c23f5921 DS |
808 | for_all_bundles_in_list(&list, unlink_bundle, NULL); |
809 | clear_bundle_list(&list); | |
810 | clear_remote_bundle_info(&bundle, NULL); | |
811 | return result; | |
20c1e2a6 DS |
812 | } |
813 | ||
12b0a14b DS |
814 | int fetch_bundle_list(struct repository *r, struct bundle_list *list) |
815 | { | |
816 | int result; | |
817 | struct bundle_list global_list; | |
818 | ||
7903efb7 DS |
819 | /* |
820 | * If the creationToken heuristic is used, then the URIs | |
821 | * advertised by 'list' are not nested lists and instead | |
822 | * direct bundles. We do not need to use global_list. | |
823 | */ | |
824 | if (list->heuristic == BUNDLE_HEURISTIC_CREATIONTOKEN) | |
825 | return fetch_bundles_by_token(r, list); | |
826 | ||
12b0a14b DS |
827 | init_bundle_list(&global_list); |
828 | ||
829 | /* If a bundle is added to this global list, then it is required. */ | |
830 | global_list.mode = BUNDLE_MODE_ALL; | |
831 | ||
832 | if ((result = download_bundle_list(r, list, &global_list, 0))) | |
833 | goto cleanup; | |
834 | ||
7903efb7 DS |
835 | if (list->heuristic == BUNDLE_HEURISTIC_CREATIONTOKEN) |
836 | result = fetch_bundles_by_token(r, list); | |
837 | else | |
838 | result = unbundle_all_bundles(r, &global_list); | |
12b0a14b DS |
839 | |
840 | cleanup: | |
841 | for_all_bundles_in_list(&global_list, unlink_bundle, NULL); | |
842 | clear_bundle_list(&global_list); | |
843 | return result; | |
844 | } | |
845 | ||
8b8d9a22 ÆAB |
846 | /** |
847 | * API for serve.c. | |
848 | */ | |
849 | ||
850 | int bundle_uri_advertise(struct repository *r, struct strbuf *value UNUSED) | |
851 | { | |
852 | static int advertise_bundle_uri = -1; | |
853 | ||
854 | if (advertise_bundle_uri != -1) | |
855 | goto cached; | |
856 | ||
857 | advertise_bundle_uri = 0; | |
858 | repo_config_get_maybe_bool(r, "uploadpack.advertisebundleuris", &advertise_bundle_uri); | |
859 | ||
860 | cached: | |
861 | return advertise_bundle_uri; | |
862 | } | |
863 | ||
738dc7d4 DS |
864 | static int config_to_packet_line(const char *key, const char *value, void *data) |
865 | { | |
866 | struct packet_reader *writer = data; | |
867 | ||
20869d1a | 868 | if (starts_with(key, "bundle.")) |
738dc7d4 DS |
869 | packet_write_fmt(writer->fd, "%s=%s", key, value); |
870 | ||
871 | return 0; | |
872 | } | |
873 | ||
8b8d9a22 ÆAB |
874 | int bundle_uri_command(struct repository *r, |
875 | struct packet_reader *request) | |
876 | { | |
877 | struct packet_writer writer; | |
878 | packet_writer_init(&writer, 1); | |
879 | ||
880 | while (packet_reader_read(request) == PACKET_READ_NORMAL) | |
881 | die(_("bundle-uri: unexpected argument: '%s'"), request->line); | |
882 | if (request->status != PACKET_READ_FLUSH) | |
883 | die(_("bundle-uri: expected flush after arguments")); | |
884 | ||
738dc7d4 DS |
885 | /* |
886 | * Read all "bundle.*" config lines to the client as key=value | |
887 | * packet lines. | |
888 | */ | |
4b4e75dd | 889 | repo_config(r, config_to_packet_line, &writer); |
8b8d9a22 ÆAB |
890 | |
891 | packet_writer_flush(&writer); | |
892 | ||
893 | return 0; | |
894 | } | |
895 | ||
9424e373 ÆAB |
896 | /** |
897 | * General API for {transport,connect}.c etc. | |
898 | */ | |
899 | int bundle_uri_parse_line(struct bundle_list *list, const char *line) | |
900 | { | |
901 | int result; | |
902 | const char *equals; | |
903 | struct strbuf key = STRBUF_INIT; | |
904 | ||
905 | if (!strlen(line)) | |
906 | return error(_("bundle-uri: got an empty line")); | |
907 | ||
908 | equals = strchr(line, '='); | |
909 | ||
910 | if (!equals) | |
911 | return error(_("bundle-uri: line is not of the form 'key=value'")); | |
912 | if (line == equals || !*(equals + 1)) | |
913 | return error(_("bundle-uri: line has empty key or value")); | |
914 | ||
915 | strbuf_add(&key, line, equals - line); | |
916 | result = bundle_list_update(key.buf, equals + 1, list); | |
917 | strbuf_release(&key); | |
918 | ||
919 | return result; | |
920 | } |