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Merge branch 'ab/remove-implicit-use-of-the-repository'
[git.git] / http-push.c
blob0e2646a6c9d2cfa37676181a8d2031cc51d3589a
1 #include "cache.h"
2 #include "hex.h"
3 #include "repository.h"
4 #include "commit.h"
5 #include "tag.h"
6 #include "blob.h"
7 #include "http.h"
8 #include "refs.h"
9 #include "diff.h"
10 #include "revision.h"
11 #include "exec-cmd.h"
12 #include "remote.h"
13 #include "list-objects.h"
14 #include "sigchain.h"
15 #include "strvec.h"
16 #include "packfile.h"
17 #include "object-store.h"
18 #include "commit-reach.h"
19
20 #ifdef EXPAT_NEEDS_XMLPARSE_H
21 #include <xmlparse.h>
22 #else
23 #include <expat.h>
24 #endif
25
26 static const char http_push_usage[] =
27 "git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
28
29 #ifndef XML_STATUS_OK
30 enum XML_Status {
31 XML_STATUS_OK = 1,
32 XML_STATUS_ERROR = 0
33 };
34 #define XML_STATUS_OK 1
35 #define XML_STATUS_ERROR 0
36 #endif
37
38 #define PREV_BUF_SIZE 4096
39
40 /* DAV methods */
41 #define DAV_LOCK "LOCK"
42 #define DAV_MKCOL "MKCOL"
43 #define DAV_MOVE "MOVE"
44 #define DAV_PROPFIND "PROPFIND"
45 #define DAV_PUT "PUT"
46 #define DAV_UNLOCK "UNLOCK"
47 #define DAV_DELETE "DELETE"
48
49 /* DAV lock flags */
50 #define DAV_PROP_LOCKWR (1u << 0)
51 #define DAV_PROP_LOCKEX (1u << 1)
52 #define DAV_LOCK_OK (1u << 2)
53
54 /* DAV XML properties */
55 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
56 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
57 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
58 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
59 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
60 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
61 #define DAV_PROPFIND_RESP ".multistatus.response"
62 #define DAV_PROPFIND_NAME ".multistatus.response.href"
63 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
64
65 /* DAV request body templates */
66 #define PROPFIND_SUPPORTEDLOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:prop xmlns:R=\"%s\">\n<D:supportedlock/>\n</D:prop>\n</D:propfind>"
67 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
68 #define LOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:lockinfo xmlns:D=\"DAV:\">\n<D:lockscope><D:exclusive/></D:lockscope>\n<D:locktype><D:write/></D:locktype>\n<D:owner>\n<D:href>mailto:%s</D:href>\n</D:owner>\n</D:lockinfo>"
69
70 #define LOCK_TIME 600
71 #define LOCK_REFRESH 30
72
73 /* Remember to update object flag allocation in object.h */
74 #define LOCAL (1u<<11)
75 #define REMOTE (1u<<12)
76 #define FETCHING (1u<<13)
77 #define PUSHING (1u<<14)
78
79 /* We allow "recursive" symbolic refs. Only within reason, though */
80 #define MAXDEPTH 5
81
82 static int pushing;
83 static int aborted;
84 static signed char remote_dir_exists[256];
85
86 static int push_verbosely;
87 static int push_all = MATCH_REFS_NONE;
88 static int force_all;
89 static int dry_run;
90 static int helper_status;
91
92 static struct object_list *objects;
93
94 struct repo {
95 char *url;
96 char *path;
97 int path_len;
98 int has_info_refs;
99 int can_update_info_refs;
100 int has_info_packs;
101 struct packed_git *packs;
102 struct remote_lock *locks;
103 };
104
105 static struct repo *repo;
106
107 enum transfer_state {
108 NEED_FETCH,
109 RUN_FETCH_LOOSE,
110 RUN_FETCH_PACKED,
111 NEED_PUSH,
112 RUN_MKCOL,
113 RUN_PUT,
114 RUN_MOVE,
115 ABORTED,
116 COMPLETE
117 };
118
119 struct transfer_request {
120 struct object *obj;
121 struct packed_git *target;
122 char *url;
123 char *dest;
124 struct remote_lock *lock;
125 struct curl_slist *headers;
126 struct buffer buffer;
127 enum transfer_state state;
128 CURLcode curl_result;
129 char errorstr[CURL_ERROR_SIZE];
130 long http_code;
131 void *userData;
132 struct active_request_slot *slot;
133 struct transfer_request *next;
134 };
135
136 static struct transfer_request *request_queue_head;
137
138 struct xml_ctx {
139 char *name;
140 int len;
141 char *cdata;
142 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
143 void *userData;
144 };
145
146 struct remote_lock {
147 char *url;
148 char *owner;
149 char *token;
150 char tmpfile_suffix[GIT_MAX_HEXSZ + 1];
151 time_t start_time;
152 long timeout;
153 int refreshing;
154 struct remote_lock *next;
155 };
156
157 /* Flags that control remote_ls processing */
158 #define PROCESS_FILES (1u << 0)
159 #define PROCESS_DIRS (1u << 1)
160 #define RECURSIVE (1u << 2)
161
162 /* Flags that remote_ls passes to callback functions */
163 #define IS_DIR (1u << 0)
164
165 struct remote_ls_ctx {
166 char *path;
167 void (*userFunc)(struct remote_ls_ctx *ls);
168 void *userData;
169 int flags;
170 char *dentry_name;
171 int dentry_flags;
172 struct remote_ls_ctx *parent;
173 };
174
175 /* get_dav_token_headers options */
176 enum dav_header_flag {
177 DAV_HEADER_IF = (1u << 0),
178 DAV_HEADER_LOCK = (1u << 1),
179 DAV_HEADER_TIMEOUT = (1u << 2)
180 };
181
182 static char *xml_entities(const char *s)
183 {
184 struct strbuf buf = STRBUF_INIT;
185 strbuf_addstr_xml_quoted(&buf, s);
186 return strbuf_detach(&buf, NULL);
187 }
188
189 static void curl_setup_http_get(CURL *curl, const char *url,
190 const char *custom_req)
191 {
192 curl_easy_setopt(curl, CURLOPT_HTTPGET, 1);
193 curl_easy_setopt(curl, CURLOPT_URL, url);
194 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
195 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_null);
196 }
197
198 static void curl_setup_http(CURL *curl, const char *url,
199 const char *custom_req, struct buffer *buffer,
200 curl_write_callback write_fn)
201 {
202 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);
203 curl_easy_setopt(curl, CURLOPT_URL, url);
204 curl_easy_setopt(curl, CURLOPT_INFILE, buffer);
205 curl_easy_setopt(curl, CURLOPT_INFILESIZE, buffer->buf.len);
206 curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
207 curl_easy_setopt(curl, CURLOPT_SEEKFUNCTION, seek_buffer);
208 curl_easy_setopt(curl, CURLOPT_SEEKDATA, buffer);
209 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_fn);
210 curl_easy_setopt(curl, CURLOPT_NOBODY, 0);
211 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
212 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);
213 }
214
215 static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
216 {
217 struct strbuf buf = STRBUF_INIT;
218 struct curl_slist *dav_headers = http_copy_default_headers();
219
220 if (options & DAV_HEADER_IF) {
221 strbuf_addf(&buf, "If: (<%s>)", lock->token);
222 dav_headers = curl_slist_append(dav_headers, buf.buf);
223 strbuf_reset(&buf);
224 }
225 if (options & DAV_HEADER_LOCK) {
226 strbuf_addf(&buf, "Lock-Token: <%s>", lock->token);
227 dav_headers = curl_slist_append(dav_headers, buf.buf);
228 strbuf_reset(&buf);
229 }
230 if (options & DAV_HEADER_TIMEOUT) {
231 strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout);
232 dav_headers = curl_slist_append(dav_headers, buf.buf);
233 strbuf_reset(&buf);
234 }
235 strbuf_release(&buf);
236
237 return dav_headers;
238 }
239
240 static void finish_request(struct transfer_request *request);
241 static void release_request(struct transfer_request *request);
242
243 static void process_response(void *callback_data)
244 {
245 struct transfer_request *request =
246 (struct transfer_request *)callback_data;
247
248 finish_request(request);
249 }
250
251 static void start_fetch_loose(struct transfer_request *request)
252 {
253 struct active_request_slot *slot;
254 struct http_object_request *obj_req;
255
256 obj_req = new_http_object_request(repo->url, &request->obj->oid);
257 if (!obj_req) {
258 request->state = ABORTED;
259 return;
260 }
261
262 slot = obj_req->slot;
263 slot->callback_func = process_response;
264 slot->callback_data = request;
265 request->slot = slot;
266 request->userData = obj_req;
267
268 /* Try to get the request started, abort the request on error */
269 request->state = RUN_FETCH_LOOSE;
270 if (!start_active_slot(slot)) {
271 fprintf(stderr, "Unable to start GET request\n");
272 repo->can_update_info_refs = 0;
273 release_http_object_request(obj_req);
274 release_request(request);
275 }
276 }
277
278 static void start_mkcol(struct transfer_request *request)
279 {
280 char *hex = oid_to_hex(&request->obj->oid);
281 struct active_request_slot *slot;
282
283 request->url = get_remote_object_url(repo->url, hex, 1);
284
285 slot = get_active_slot();
286 slot->callback_func = process_response;
287 slot->callback_data = request;
288 curl_setup_http_get(slot->curl, request->url, DAV_MKCOL);
289 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
290
291 if (start_active_slot(slot)) {
292 request->slot = slot;
293 request->state = RUN_MKCOL;
294 } else {
295 request->state = ABORTED;
296 FREE_AND_NULL(request->url);
297 }
298 }
299
300 static void start_fetch_packed(struct transfer_request *request)
301 {
302 struct packed_git *target;
303
304 struct transfer_request *check_request = request_queue_head;
305 struct http_pack_request *preq;
306
307 target = find_sha1_pack(request->obj->oid.hash, repo->packs);
308 if (!target) {
309 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", oid_to_hex(&request->obj->oid));
310 repo->can_update_info_refs = 0;
311 release_request(request);
312 return;
313 }
314 close_pack_index(target);
315 request->target = target;
316
317 fprintf(stderr, "Fetching pack %s\n",
318 hash_to_hex(target->hash));
319 fprintf(stderr, " which contains %s\n", oid_to_hex(&request->obj->oid));
320
321 preq = new_http_pack_request(target->hash, repo->url);
322 if (!preq) {
323 repo->can_update_info_refs = 0;
324 return;
325 }
326
327 /* Make sure there isn't another open request for this pack */
328 while (check_request) {
329 if (check_request->state == RUN_FETCH_PACKED &&
330 !strcmp(check_request->url, preq->url)) {
331 release_http_pack_request(preq);
332 release_request(request);
333 return;
334 }
335 check_request = check_request->next;
336 }
337
338 preq->slot->callback_func = process_response;
339 preq->slot->callback_data = request;
340 request->slot = preq->slot;
341 request->userData = preq;
342
343 /* Try to get the request started, abort the request on error */
344 request->state = RUN_FETCH_PACKED;
345 if (!start_active_slot(preq->slot)) {
346 fprintf(stderr, "Unable to start GET request\n");
347 release_http_pack_request(preq);
348 repo->can_update_info_refs = 0;
349 release_request(request);
350 }
351 }
352
353 static void start_put(struct transfer_request *request)
354 {
355 char *hex = oid_to_hex(&request->obj->oid);
356 struct active_request_slot *slot;
357 struct strbuf buf = STRBUF_INIT;
358 enum object_type type;
359 char hdr[50];
360 void *unpacked;
361 unsigned long len;
362 int hdrlen;
363 ssize_t size;
364 git_zstream stream;
365
366 unpacked = repo_read_object_file(the_repository, &request->obj->oid,
367 &type, &len);
368 hdrlen = format_object_header(hdr, sizeof(hdr), type, len);
369
370 /* Set it up */
371 git_deflate_init(&stream, zlib_compression_level);
372 size = git_deflate_bound(&stream, len + hdrlen);
373 strbuf_init(&request->buffer.buf, size);
374 request->buffer.posn = 0;
375
376 /* Compress it */
377 stream.next_out = (unsigned char *)request->buffer.buf.buf;
378 stream.avail_out = size;
379
380 /* First header.. */
381 stream.next_in = (void *)hdr;
382 stream.avail_in = hdrlen;
383 while (git_deflate(&stream, 0) == Z_OK)
384 ; /* nothing */
385
386 /* Then the data itself.. */
387 stream.next_in = unpacked;
388 stream.avail_in = len;
389 while (git_deflate(&stream, Z_FINISH) == Z_OK)
390 ; /* nothing */
391 git_deflate_end(&stream);
392 free(unpacked);
393
394 request->buffer.buf.len = stream.total_out;
395
396 strbuf_addstr(&buf, "Destination: ");
397 append_remote_object_url(&buf, repo->url, hex, 0);
398 request->dest = strbuf_detach(&buf, NULL);
399
400 append_remote_object_url(&buf, repo->url, hex, 0);
401 strbuf_add(&buf, request->lock->tmpfile_suffix, the_hash_algo->hexsz + 1);
402 request->url = strbuf_detach(&buf, NULL);
403
404 slot = get_active_slot();
405 slot->callback_func = process_response;
406 slot->callback_data = request;
407 curl_setup_http(slot->curl, request->url, DAV_PUT,
408 &request->buffer, fwrite_null);
409
410 if (start_active_slot(slot)) {
411 request->slot = slot;
412 request->state = RUN_PUT;
413 } else {
414 request->state = ABORTED;
415 FREE_AND_NULL(request->url);
416 }
417 }
418
419 static void start_move(struct transfer_request *request)
420 {
421 struct active_request_slot *slot;
422 struct curl_slist *dav_headers = http_copy_default_headers();
423
424 slot = get_active_slot();
425 slot->callback_func = process_response;
426 slot->callback_data = request;
427 curl_setup_http_get(slot->curl, request->url, DAV_MOVE);
428 dav_headers = curl_slist_append(dav_headers, request->dest);
429 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
430 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
431
432 if (start_active_slot(slot)) {
433 request->slot = slot;
434 request->state = RUN_MOVE;
435 } else {
436 request->state = ABORTED;
437 FREE_AND_NULL(request->url);
438 }
439 }
440
441 static int refresh_lock(struct remote_lock *lock)
442 {
443 struct active_request_slot *slot;
444 struct slot_results results;
445 struct curl_slist *dav_headers;
446 int rc = 0;
447
448 lock->refreshing = 1;
449
450 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
451
452 slot = get_active_slot();
453 slot->results = &results;
454 curl_setup_http_get(slot->curl, lock->url, DAV_LOCK);
455 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
456
457 if (start_active_slot(slot)) {
458 run_active_slot(slot);
459 if (results.curl_result != CURLE_OK) {
460 fprintf(stderr, "LOCK HTTP error %ld\n",
461 results.http_code);
462 } else {
463 lock->start_time = time(NULL);
464 rc = 1;
465 }
466 }
467
468 lock->refreshing = 0;
469 curl_slist_free_all(dav_headers);
470
471 return rc;
472 }
473
474 static void check_locks(void)
475 {
476 struct remote_lock *lock = repo->locks;
477 time_t current_time = time(NULL);
478 int time_remaining;
479
480 while (lock) {
481 time_remaining = lock->start_time + lock->timeout -
482 current_time;
483 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
484 if (!refresh_lock(lock)) {
485 fprintf(stderr,
486 "Unable to refresh lock for %s\n",
487 lock->url);
488 aborted = 1;
489 return;
490 }
491 }
492 lock = lock->next;
493 }
494 }
495
496 static void release_request(struct transfer_request *request)
497 {
498 struct transfer_request *entry = request_queue_head;
499
500 if (request == request_queue_head) {
501 request_queue_head = request->next;
502 } else {
503 while (entry && entry->next != request)
504 entry = entry->next;
505 if (entry)
506 entry->next = request->next;
507 }
508
509 free(request->url);
510 free(request);
511 }
512
513 static void finish_request(struct transfer_request *request)
514 {
515 struct http_pack_request *preq;
516 struct http_object_request *obj_req;
517
518 request->curl_result = request->slot->curl_result;
519 request->http_code = request->slot->http_code;
520 request->slot = NULL;
521
522 /* Keep locks active */
523 check_locks();
524
525 if (request->headers)
526 curl_slist_free_all(request->headers);
527
528 /* URL is reused for MOVE after PUT and used during FETCH */
529 if (request->state != RUN_PUT && request->state != RUN_FETCH_PACKED) {
530 FREE_AND_NULL(request->url);
531 }
532
533 if (request->state == RUN_MKCOL) {
534 if (request->curl_result == CURLE_OK ||
535 request->http_code == 405) {
536 remote_dir_exists[request->obj->oid.hash[0]] = 1;
537 start_put(request);
538 } else {
539 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
540 oid_to_hex(&request->obj->oid),
541 request->curl_result, request->http_code);
542 request->state = ABORTED;
543 aborted = 1;
544 }
545 } else if (request->state == RUN_PUT) {
546 if (request->curl_result == CURLE_OK) {
547 start_move(request);
548 } else {
549 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
550 oid_to_hex(&request->obj->oid),
551 request->curl_result, request->http_code);
552 request->state = ABORTED;
553 aborted = 1;
554 }
555 } else if (request->state == RUN_MOVE) {
556 if (request->curl_result == CURLE_OK) {
557 if (push_verbosely)
558 fprintf(stderr, " sent %s\n",
559 oid_to_hex(&request->obj->oid));
560 request->obj->flags |= REMOTE;
561 release_request(request);
562 } else {
563 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
564 oid_to_hex(&request->obj->oid),
565 request->curl_result, request->http_code);
566 request->state = ABORTED;
567 aborted = 1;
568 }
569 } else if (request->state == RUN_FETCH_LOOSE) {
570 obj_req = (struct http_object_request *)request->userData;
571
572 if (finish_http_object_request(obj_req) == 0)
573 if (obj_req->rename == 0)
574 request->obj->flags |= (LOCAL | REMOTE);
575
576 /* Try fetching packed if necessary */
577 if (request->obj->flags & LOCAL) {
578 release_http_object_request(obj_req);
579 release_request(request);
580 } else
581 start_fetch_packed(request);
582
583 } else if (request->state == RUN_FETCH_PACKED) {
584 int fail = 1;
585 if (request->curl_result != CURLE_OK) {
586 fprintf(stderr, "Unable to get pack file %s\n%s",
587 request->url, curl_errorstr);
588 } else {
589 preq = (struct http_pack_request *)request->userData;
590
591 if (preq) {
592 if (finish_http_pack_request(preq) == 0)
593 fail = 0;
594 release_http_pack_request(preq);
595 }
596 }
597 if (fail)
598 repo->can_update_info_refs = 0;
599 else
600 http_install_packfile(request->target, &repo->packs);
601 release_request(request);
602 }
603 }
604
605 static int is_running_queue;
606 static int fill_active_slot(void *data UNUSED)
607 {
608 struct transfer_request *request;
609
610 if (aborted || !is_running_queue)
611 return 0;
612
613 for (request = request_queue_head; request; request = request->next) {
614 if (request->state == NEED_FETCH) {
615 start_fetch_loose(request);
616 return 1;
617 } else if (pushing && request->state == NEED_PUSH) {
618 if (remote_dir_exists[request->obj->oid.hash[0]] == 1) {
619 start_put(request);
620 } else {
621 start_mkcol(request);
622 }
623 return 1;
624 }
625 }
626 return 0;
627 }
628
629 static void get_remote_object_list(unsigned char parent);
630
631 static void add_fetch_request(struct object *obj)
632 {
633 struct transfer_request *request;
634
635 check_locks();
636
637 /*
638 * Don't fetch the object if it's known to exist locally
639 * or is already in the request queue
640 */
641 if (remote_dir_exists[obj->oid.hash[0]] == -1)
642 get_remote_object_list(obj->oid.hash[0]);
643 if (obj->flags & (LOCAL | FETCHING))
644 return;
645
646 obj->flags |= FETCHING;
647 request = xmalloc(sizeof(*request));
648 request->obj = obj;
649 request->url = NULL;
650 request->lock = NULL;
651 request->headers = NULL;
652 request->state = NEED_FETCH;
653 request->next = request_queue_head;
654 request_queue_head = request;
655
656 fill_active_slots();
657 step_active_slots();
658 }
659
660 static int add_send_request(struct object *obj, struct remote_lock *lock)
661 {
662 struct transfer_request *request;
663 struct packed_git *target;
664
665 /* Keep locks active */
666 check_locks();
667
668 /*
669 * Don't push the object if it's known to exist on the remote
670 * or is already in the request queue
671 */
672 if (remote_dir_exists[obj->oid.hash[0]] == -1)
673 get_remote_object_list(obj->oid.hash[0]);
674 if (obj->flags & (REMOTE | PUSHING))
675 return 0;
676 target = find_sha1_pack(obj->oid.hash, repo->packs);
677 if (target) {
678 obj->flags |= REMOTE;
679 return 0;
680 }
681
682 obj->flags |= PUSHING;
683 request = xmalloc(sizeof(*request));
684 request->obj = obj;
685 request->url = NULL;
686 request->lock = lock;
687 request->headers = NULL;
688 request->state = NEED_PUSH;
689 request->next = request_queue_head;
690 request_queue_head = request;
691
692 fill_active_slots();
693 step_active_slots();
694
695 return 1;
696 }
697
698 static int fetch_indices(void)
699 {
700 int ret;
701
702 if (push_verbosely)
703 fprintf(stderr, "Getting pack list\n");
704
705 switch (http_get_info_packs(repo->url, &repo->packs)) {
706 case HTTP_OK:
707 case HTTP_MISSING_TARGET:
708 ret = 0;
709 break;
710 default:
711 ret = -1;
712 }
713
714 return ret;
715 }
716
717 static void one_remote_object(const struct object_id *oid)
718 {
719 struct object *obj;
720
721 obj = lookup_object(the_repository, oid);
722 if (!obj)
723 obj = parse_object(the_repository, oid);
724
725 /* Ignore remote objects that don't exist locally */
726 if (!obj)
727 return;
728
729 obj->flags |= REMOTE;
730 if (!object_list_contains(objects, obj))
731 object_list_insert(obj, &objects);
732 }
733
734 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
735 {
736 int *lock_flags = (int *)ctx->userData;
737
738 if (tag_closed) {
739 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
740 if ((*lock_flags & DAV_PROP_LOCKEX) &&
741 (*lock_flags & DAV_PROP_LOCKWR)) {
742 *lock_flags |= DAV_LOCK_OK;
743 }
744 *lock_flags &= DAV_LOCK_OK;
745 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
746 *lock_flags |= DAV_PROP_LOCKWR;
747 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
748 *lock_flags |= DAV_PROP_LOCKEX;
749 }
750 }
751 }
752
753 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
754 {
755 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
756 git_hash_ctx hash_ctx;
757 unsigned char lock_token_hash[GIT_MAX_RAWSZ];
758
759 if (tag_closed && ctx->cdata) {
760 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
761 lock->owner = xstrdup(ctx->cdata);
762 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
763 const char *arg;
764 if (skip_prefix(ctx->cdata, "Second-", &arg))
765 lock->timeout = strtol(arg, NULL, 10);
766 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
767 lock->token = xstrdup(ctx->cdata);
768
769 the_hash_algo->init_fn(&hash_ctx);
770 the_hash_algo->update_fn(&hash_ctx, lock->token, strlen(lock->token));
771 the_hash_algo->final_fn(lock_token_hash, &hash_ctx);
772
773 lock->tmpfile_suffix[0] = '_';
774 memcpy(lock->tmpfile_suffix + 1, hash_to_hex(lock_token_hash), the_hash_algo->hexsz);
775 }
776 }
777 }
778
779 static void one_remote_ref(const char *refname);
780
781 static void
782 xml_start_tag(void *userData, const char *name, const char **atts)
783 {
784 struct xml_ctx *ctx = (struct xml_ctx *)userData;
785 const char *c = strchr(name, ':');
786 int old_namelen, new_len;
787
788 if (!c)
789 c = name;
790 else
791 c++;
792
793 old_namelen = strlen(ctx->name);
794 new_len = old_namelen + strlen(c) + 2;
795
796 if (new_len > ctx->len) {
797 ctx->name = xrealloc(ctx->name, new_len);
798 ctx->len = new_len;
799 }
800 xsnprintf(ctx->name + old_namelen, ctx->len - old_namelen, ".%s", c);
801
802 FREE_AND_NULL(ctx->cdata);
803
804 ctx->userFunc(ctx, 0);
805 }
806
807 static void
808 xml_end_tag(void *userData, const char *name)
809 {
810 struct xml_ctx *ctx = (struct xml_ctx *)userData;
811 const char *c = strchr(name, ':');
812 char *ep;
813
814 ctx->userFunc(ctx, 1);
815
816 if (!c)
817 c = name;
818 else
819 c++;
820
821 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
822 *ep = 0;
823 }
824
825 static void
826 xml_cdata(void *userData, const XML_Char *s, int len)
827 {
828 struct xml_ctx *ctx = (struct xml_ctx *)userData;
829 free(ctx->cdata);
830 ctx->cdata = xmemdupz(s, len);
831 }
832
833 static struct remote_lock *lock_remote(const char *path, long timeout)
834 {
835 struct active_request_slot *slot;
836 struct slot_results results;
837 struct buffer out_buffer = { STRBUF_INIT, 0 };
838 struct strbuf in_buffer = STRBUF_INIT;
839 char *url;
840 char *ep;
841 char timeout_header[25];
842 struct remote_lock *lock = NULL;
843 struct curl_slist *dav_headers = http_copy_default_headers();
844 struct xml_ctx ctx;
845 char *escaped;
846
847 url = xstrfmt("%s%s", repo->url, path);
848
849 /* Make sure leading directories exist for the remote ref */
850 ep = strchr(url + strlen(repo->url) + 1, '/');
851 while (ep) {
852 char saved_character = ep[1];
853 ep[1] = '\0';
854 slot = get_active_slot();
855 slot->results = &results;
856 curl_setup_http_get(slot->curl, url, DAV_MKCOL);
857 if (start_active_slot(slot)) {
858 run_active_slot(slot);
859 if (results.curl_result != CURLE_OK &&
860 results.http_code != 405) {
861 fprintf(stderr,
862 "Unable to create branch path %s\n",
863 url);
864 free(url);
865 return NULL;
866 }
867 } else {
868 fprintf(stderr, "Unable to start MKCOL request\n");
869 free(url);
870 return NULL;
871 }
872 ep[1] = saved_character;
873 ep = strchr(ep + 1, '/');
874 }
875
876 escaped = xml_entities(ident_default_email());
877 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
878 free(escaped);
879
880 xsnprintf(timeout_header, sizeof(timeout_header), "Timeout: Second-%ld", timeout);
881 dav_headers = curl_slist_append(dav_headers, timeout_header);
882 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
883
884 slot = get_active_slot();
885 slot->results = &results;
886 curl_setup_http(slot->curl, url, DAV_LOCK, &out_buffer, fwrite_buffer);
887 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
888 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &in_buffer);
889
890 CALLOC_ARRAY(lock, 1);
891 lock->timeout = -1;
892
893 if (start_active_slot(slot)) {
894 run_active_slot(slot);
895 if (results.curl_result == CURLE_OK) {
896 XML_Parser parser = XML_ParserCreate(NULL);
897 enum XML_Status result;
898 ctx.name = xcalloc(10, 1);
899 ctx.len = 0;
900 ctx.cdata = NULL;
901 ctx.userFunc = handle_new_lock_ctx;
902 ctx.userData = lock;
903 XML_SetUserData(parser, &ctx);
904 XML_SetElementHandler(parser, xml_start_tag,
905 xml_end_tag);
906 XML_SetCharacterDataHandler(parser, xml_cdata);
907 result = XML_Parse(parser, in_buffer.buf,
908 in_buffer.len, 1);
909 free(ctx.name);
910 if (result != XML_STATUS_OK) {
911 fprintf(stderr, "XML error: %s\n",
912 XML_ErrorString(
913 XML_GetErrorCode(parser)));
914 lock->timeout = -1;
915 }
916 XML_ParserFree(parser);
917 } else {
918 fprintf(stderr,
919 "error: curl result=%d, HTTP code=%ld\n",
920 results.curl_result, results.http_code);
921 }
922 } else {
923 fprintf(stderr, "Unable to start LOCK request\n");
924 }
925
926 curl_slist_free_all(dav_headers);
927 strbuf_release(&out_buffer.buf);
928 strbuf_release(&in_buffer);
929
930 if (lock->token == NULL || lock->timeout <= 0) {
931 free(lock->token);
932 free(lock->owner);
933 free(url);
934 FREE_AND_NULL(lock);
935 } else {
936 lock->url = url;
937 lock->start_time = time(NULL);
938 lock->next = repo->locks;
939 repo->locks = lock;
940 }
941
942 return lock;
943 }
944
945 static int unlock_remote(struct remote_lock *lock)
946 {
947 struct active_request_slot *slot;
948 struct slot_results results;
949 struct remote_lock *prev = repo->locks;
950 struct curl_slist *dav_headers;
951 int rc = 0;
952
953 dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
954
955 slot = get_active_slot();
956 slot->results = &results;
957 curl_setup_http_get(slot->curl, lock->url, DAV_UNLOCK);
958 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
959
960 if (start_active_slot(slot)) {
961 run_active_slot(slot);
962 if (results.curl_result == CURLE_OK)
963 rc = 1;
964 else
965 fprintf(stderr, "UNLOCK HTTP error %ld\n",
966 results.http_code);
967 } else {
968 fprintf(stderr, "Unable to start UNLOCK request\n");
969 }
970
971 curl_slist_free_all(dav_headers);
972
973 if (repo->locks == lock) {
974 repo->locks = lock->next;
975 } else {
976 while (prev && prev->next != lock)
977 prev = prev->next;
978 if (prev)
979 prev->next = lock->next;
980 }
981
982 free(lock->owner);
983 free(lock->url);
984 free(lock->token);
985 free(lock);
986
987 return rc;
988 }
989
990 static void remove_locks(void)
991 {
992 struct remote_lock *lock = repo->locks;
993
994 fprintf(stderr, "Removing remote locks...\n");
995 while (lock) {
996 struct remote_lock *next = lock->next;
997 unlock_remote(lock);
998 lock = next;
999 }
1000 }
1001
1002 static void remove_locks_on_signal(int signo)
1003 {
1004 remove_locks();
1005 sigchain_pop(signo);
1006 raise(signo);
1007 }
1008
1009 static void remote_ls(const char *path, int flags,
1010 void (*userFunc)(struct remote_ls_ctx *ls),
1011 void *userData);
1012
1013 /* extract hex from sharded "xx/x{38}" filename */
1014 static int get_oid_hex_from_objpath(const char *path, struct object_id *oid)
1015 {
1016 oid->algo = hash_algo_by_ptr(the_hash_algo);
1017
1018 if (strlen(path) != the_hash_algo->hexsz + 1)
1019 return -1;
1020
1021 if (hex_to_bytes(oid->hash, path, 1))
1022 return -1;
1023 path += 2;
1024 path++; /* skip '/' */
1025
1026 return hex_to_bytes(oid->hash + 1, path, the_hash_algo->rawsz - 1);
1027 }
1028
1029 static void process_ls_object(struct remote_ls_ctx *ls)
1030 {
1031 unsigned int *parent = (unsigned int *)ls->userData;
1032 const char *path = ls->dentry_name;
1033 struct object_id oid;
1034
1035 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1036 remote_dir_exists[*parent] = 1;
1037 return;
1038 }
1039
1040 if (!skip_prefix(path, "objects/", &path) ||
1041 get_oid_hex_from_objpath(path, &oid))
1042 return;
1043
1044 one_remote_object(&oid);
1045 }
1046
1047 static void process_ls_ref(struct remote_ls_ctx *ls)
1048 {
1049 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1050 fprintf(stderr, " %s\n", ls->dentry_name);
1051 return;
1052 }
1053
1054 if (!(ls->dentry_flags & IS_DIR))
1055 one_remote_ref(ls->dentry_name);
1056 }
1057
1058 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1059 {
1060 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1061
1062 if (tag_closed) {
1063 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1064 if (ls->dentry_flags & IS_DIR) {
1065
1066 /* ensure collection names end with slash */
1067 str_end_url_with_slash(ls->dentry_name, &ls->dentry_name);
1068
1069 if (ls->flags & PROCESS_DIRS) {
1070 ls->userFunc(ls);
1071 }
1072 if (strcmp(ls->dentry_name, ls->path) &&
1073 ls->flags & RECURSIVE) {
1074 remote_ls(ls->dentry_name,
1075 ls->flags,
1076 ls->userFunc,
1077 ls->userData);
1078 }
1079 } else if (ls->flags & PROCESS_FILES) {
1080 ls->userFunc(ls);
1081 }
1082 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1083 char *path = ctx->cdata;
1084 if (*ctx->cdata == 'h') {
1085 path = strstr(path, "//");
1086 if (path) {
1087 path = strchr(path+2, '/');
1088 }
1089 }
1090 if (path) {
1091 const char *url = repo->url;
1092 if (repo->path)
1093 url = repo->path;
1094 if (strncmp(path, url, repo->path_len))
1095 error("Parsed path '%s' does not match url: '%s'",
1096 path, url);
1097 else {
1098 path += repo->path_len;
1099 ls->dentry_name = xstrdup(path);
1100 }
1101 }
1102 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1103 ls->dentry_flags |= IS_DIR;
1104 }
1105 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1106 FREE_AND_NULL(ls->dentry_name);
1107 ls->dentry_flags = 0;
1108 }
1109 }
1110
1111 /*
1112 * NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it
1113 * should _only_ heed the information from that file, instead of trying to
1114 * determine the refs from the remote file system (badly: it does not even
1115 * know about packed-refs).
1116 */
1117 static void remote_ls(const char *path, int flags,
1118 void (*userFunc)(struct remote_ls_ctx *ls),
1119 void *userData)
1120 {
1121 char *url = xstrfmt("%s%s", repo->url, path);
1122 struct active_request_slot *slot;
1123 struct slot_results results;
1124 struct strbuf in_buffer = STRBUF_INIT;
1125 struct buffer out_buffer = { STRBUF_INIT, 0 };
1126 struct curl_slist *dav_headers = http_copy_default_headers();
1127 struct xml_ctx ctx;
1128 struct remote_ls_ctx ls;
1129
1130 ls.flags = flags;
1131 ls.path = xstrdup(path);
1132 ls.dentry_name = NULL;
1133 ls.dentry_flags = 0;
1134 ls.userData = userData;
1135 ls.userFunc = userFunc;
1136
1137 strbuf_addstr(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1138
1139 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1140 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1141
1142 slot = get_active_slot();
1143 slot->results = &results;
1144 curl_setup_http(slot->curl, url, DAV_PROPFIND,
1145 &out_buffer, fwrite_buffer);
1146 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1147 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &in_buffer);
1148
1149 if (start_active_slot(slot)) {
1150 run_active_slot(slot);
1151 if (results.curl_result == CURLE_OK) {
1152 XML_Parser parser = XML_ParserCreate(NULL);
1153 enum XML_Status result;
1154 ctx.name = xcalloc(10, 1);
1155 ctx.len = 0;
1156 ctx.cdata = NULL;
1157 ctx.userFunc = handle_remote_ls_ctx;
1158 ctx.userData = &ls;
1159 XML_SetUserData(parser, &ctx);
1160 XML_SetElementHandler(parser, xml_start_tag,
1161 xml_end_tag);
1162 XML_SetCharacterDataHandler(parser, xml_cdata);
1163 result = XML_Parse(parser, in_buffer.buf,
1164 in_buffer.len, 1);
1165 free(ctx.name);
1166
1167 if (result != XML_STATUS_OK) {
1168 fprintf(stderr, "XML error: %s\n",
1169 XML_ErrorString(
1170 XML_GetErrorCode(parser)));
1171 }
1172 XML_ParserFree(parser);
1173 }
1174 } else {
1175 fprintf(stderr, "Unable to start PROPFIND request\n");
1176 }
1177
1178 free(ls.path);
1179 free(url);
1180 strbuf_release(&out_buffer.buf);
1181 strbuf_release(&in_buffer);
1182 curl_slist_free_all(dav_headers);
1183 }
1184
1185 static void get_remote_object_list(unsigned char parent)
1186 {
1187 char path[] = "objects/XX/";
1188 static const char hex[] = "0123456789abcdef";
1189 unsigned int val = parent;
1190
1191 path[8] = hex[val >> 4];
1192 path[9] = hex[val & 0xf];
1193 remote_dir_exists[val] = 0;
1194 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1195 process_ls_object, &val);
1196 }
1197
1198 static int locking_available(void)
1199 {
1200 struct active_request_slot *slot;
1201 struct slot_results results;
1202 struct strbuf in_buffer = STRBUF_INIT;
1203 struct buffer out_buffer = { STRBUF_INIT, 0 };
1204 struct curl_slist *dav_headers = http_copy_default_headers();
1205 struct xml_ctx ctx;
1206 int lock_flags = 0;
1207 char *escaped;
1208
1209 escaped = xml_entities(repo->url);
1210 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
1211 free(escaped);
1212
1213 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1214 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1215
1216 slot = get_active_slot();
1217 slot->results = &results;
1218 curl_setup_http(slot->curl, repo->url, DAV_PROPFIND,
1219 &out_buffer, fwrite_buffer);
1220 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1221 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &in_buffer);
1222
1223 if (start_active_slot(slot)) {
1224 run_active_slot(slot);
1225 if (results.curl_result == CURLE_OK) {
1226 XML_Parser parser = XML_ParserCreate(NULL);
1227 enum XML_Status result;
1228 ctx.name = xcalloc(10, 1);
1229 ctx.len = 0;
1230 ctx.cdata = NULL;
1231 ctx.userFunc = handle_lockprop_ctx;
1232 ctx.userData = &lock_flags;
1233 XML_SetUserData(parser, &ctx);
1234 XML_SetElementHandler(parser, xml_start_tag,
1235 xml_end_tag);
1236 result = XML_Parse(parser, in_buffer.buf,
1237 in_buffer.len, 1);
1238 free(ctx.name);
1239
1240 if (result != XML_STATUS_OK) {
1241 fprintf(stderr, "XML error: %s\n",
1242 XML_ErrorString(
1243 XML_GetErrorCode(parser)));
1244 lock_flags = 0;
1245 }
1246 XML_ParserFree(parser);
1247 if (!lock_flags)
1248 error("no DAV locking support on %s",
1249 repo->url);
1250
1251 } else {
1252 error("Cannot access URL %s, return code %d",
1253 repo->url, results.curl_result);
1254 lock_flags = 0;
1255 }
1256 } else {
1257 error("Unable to start PROPFIND request on %s", repo->url);
1258 }
1259
1260 strbuf_release(&out_buffer.buf);
1261 strbuf_release(&in_buffer);
1262 curl_slist_free_all(dav_headers);
1263
1264 return lock_flags;
1265 }
1266
1267 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1268 {
1269 struct object_list *entry = xmalloc(sizeof(struct object_list));
1270 entry->item = obj;
1271 entry->next = *p;
1272 *p = entry;
1273 return &entry->next;
1274 }
1275
1276 static struct object_list **process_blob(struct blob *blob,
1277 struct object_list **p)
1278 {
1279 struct object *obj = &blob->object;
1280
1281 obj->flags |= LOCAL;
1282
1283 if (obj->flags & (UNINTERESTING | SEEN))
1284 return p;
1285
1286 obj->flags |= SEEN;
1287 return add_one_object(obj, p);
1288 }
1289
1290 static struct object_list **process_tree(struct tree *tree,
1291 struct object_list **p)
1292 {
1293 struct object *obj = &tree->object;
1294 struct tree_desc desc;
1295 struct name_entry entry;
1296
1297 obj->flags |= LOCAL;
1298
1299 if (obj->flags & (UNINTERESTING | SEEN))
1300 return p;
1301 if (parse_tree(tree) < 0)
1302 die("bad tree object %s", oid_to_hex(&obj->oid));
1303
1304 obj->flags |= SEEN;
1305 p = add_one_object(obj, p);
1306
1307 init_tree_desc(&desc, tree->buffer, tree->size);
1308
1309 while (tree_entry(&desc, &entry))
1310 switch (object_type(entry.mode)) {
1311 case OBJ_TREE:
1312 p = process_tree(lookup_tree(the_repository, &entry.oid),
1313 p);
1314 break;
1315 case OBJ_BLOB:
1316 p = process_blob(lookup_blob(the_repository, &entry.oid),
1317 p);
1318 break;
1319 default:
1320 /* Subproject commit - not in this repository */
1321 break;
1322 }
1323
1324 free_tree_buffer(tree);
1325 return p;
1326 }
1327
1328 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1329 {
1330 int i;
1331 struct commit *commit;
1332 struct object_list **p = &objects;
1333 int count = 0;
1334
1335 while ((commit = get_revision(revs)) != NULL) {
1336 p = process_tree(repo_get_commit_tree(the_repository, commit),
1337 p);
1338 commit->object.flags |= LOCAL;
1339 if (!(commit->object.flags & UNINTERESTING))
1340 count += add_send_request(&commit->object, lock);
1341 }
1342
1343 for (i = 0; i < revs->pending.nr; i++) {
1344 struct object_array_entry *entry = revs->pending.objects + i;
1345 struct object *obj = entry->item;
1346 const char *name = entry->name;
1347
1348 if (obj->flags & (UNINTERESTING | SEEN))
1349 continue;
1350 if (obj->type == OBJ_TAG) {
1351 obj->flags |= SEEN;
1352 p = add_one_object(obj, p);
1353 continue;
1354 }
1355 if (obj->type == OBJ_TREE) {
1356 p = process_tree((struct tree *)obj, p);
1357 continue;
1358 }
1359 if (obj->type == OBJ_BLOB) {
1360 p = process_blob((struct blob *)obj, p);
1361 continue;
1362 }
1363 die("unknown pending object %s (%s)", oid_to_hex(&obj->oid), name);
1364 }
1365
1366 while (objects) {
1367 if (!(objects->item->flags & UNINTERESTING))
1368 count += add_send_request(objects->item, lock);
1369 objects = objects->next;
1370 }
1371
1372 return count;
1373 }
1374
1375 static int update_remote(const struct object_id *oid, struct remote_lock *lock)
1376 {
1377 struct active_request_slot *slot;
1378 struct slot_results results;
1379 struct buffer out_buffer = { STRBUF_INIT, 0 };
1380 struct curl_slist *dav_headers;
1381
1382 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1383
1384 strbuf_addf(&out_buffer.buf, "%s\n", oid_to_hex(oid));
1385
1386 slot = get_active_slot();
1387 slot->results = &results;
1388 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1389 &out_buffer, fwrite_null);
1390 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1391
1392 if (start_active_slot(slot)) {
1393 run_active_slot(slot);
1394 strbuf_release(&out_buffer.buf);
1395 if (results.curl_result != CURLE_OK) {
1396 fprintf(stderr,
1397 "PUT error: curl result=%d, HTTP code=%ld\n",
1398 results.curl_result, results.http_code);
1399 /* We should attempt recovery? */
1400 return 0;
1401 }
1402 } else {
1403 strbuf_release(&out_buffer.buf);
1404 fprintf(stderr, "Unable to start PUT request\n");
1405 return 0;
1406 }
1407
1408 return 1;
1409 }
1410
1411 static struct ref *remote_refs;
1412
1413 static void one_remote_ref(const char *refname)
1414 {
1415 struct ref *ref;
1416 struct object *obj;
1417
1418 ref = alloc_ref(refname);
1419
1420 if (http_fetch_ref(repo->url, ref) != 0) {
1421 fprintf(stderr,
1422 "Unable to fetch ref %s from %s\n",
1423 refname, repo->url);
1424 free(ref);
1425 return;
1426 }
1427
1428 /*
1429 * Fetch a copy of the object if it doesn't exist locally - it
1430 * may be required for updating server info later.
1431 */
1432 if (repo->can_update_info_refs && !repo_has_object_file(the_repository, &ref->old_oid)) {
1433 obj = lookup_unknown_object(the_repository, &ref->old_oid);
1434 fprintf(stderr, " fetch %s for %s\n",
1435 oid_to_hex(&ref->old_oid), refname);
1436 add_fetch_request(obj);
1437 }
1438
1439 ref->next = remote_refs;
1440 remote_refs = ref;
1441 }
1442
1443 static void get_dav_remote_heads(void)
1444 {
1445 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1446 }
1447
1448 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1449 {
1450 struct strbuf *buf = (struct strbuf *)ls->userData;
1451 struct object *o;
1452 struct ref *ref;
1453
1454 ref = alloc_ref(ls->dentry_name);
1455
1456 if (http_fetch_ref(repo->url, ref) != 0) {
1457 fprintf(stderr,
1458 "Unable to fetch ref %s from %s\n",
1459 ls->dentry_name, repo->url);
1460 aborted = 1;
1461 free(ref);
1462 return;
1463 }
1464
1465 o = parse_object(the_repository, &ref->old_oid);
1466 if (!o) {
1467 fprintf(stderr,
1468 "Unable to parse object %s for remote ref %s\n",
1469 oid_to_hex(&ref->old_oid), ls->dentry_name);
1470 aborted = 1;
1471 free(ref);
1472 return;
1473 }
1474
1475 strbuf_addf(buf, "%s\t%s\n",
1476 oid_to_hex(&ref->old_oid), ls->dentry_name);
1477
1478 if (o->type == OBJ_TAG) {
1479 o = deref_tag(the_repository, o, ls->dentry_name, 0);
1480 if (o)
1481 strbuf_addf(buf, "%s\t%s^{}\n",
1482 oid_to_hex(&o->oid), ls->dentry_name);
1483 }
1484 free(ref);
1485 }
1486
1487 static void update_remote_info_refs(struct remote_lock *lock)
1488 {
1489 struct buffer buffer = { STRBUF_INIT, 0 };
1490 struct active_request_slot *slot;
1491 struct slot_results results;
1492 struct curl_slist *dav_headers;
1493
1494 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1495 add_remote_info_ref, &buffer.buf);
1496 if (!aborted) {
1497 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1498
1499 slot = get_active_slot();
1500 slot->results = &results;
1501 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1502 &buffer, fwrite_null);
1503 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1504
1505 if (start_active_slot(slot)) {
1506 run_active_slot(slot);
1507 if (results.curl_result != CURLE_OK) {
1508 fprintf(stderr,
1509 "PUT error: curl result=%d, HTTP code=%ld\n",
1510 results.curl_result, results.http_code);
1511 }
1512 }
1513 }
1514 strbuf_release(&buffer.buf);
1515 }
1516
1517 static int remote_exists(const char *path)
1518 {
1519 char *url = xstrfmt("%s%s", repo->url, path);
1520 int ret;
1521
1522
1523 switch (http_get_strbuf(url, NULL, NULL)) {
1524 case HTTP_OK:
1525 ret = 1;
1526 break;
1527 case HTTP_MISSING_TARGET:
1528 ret = 0;
1529 break;
1530 case HTTP_ERROR:
1531 error("unable to access '%s': %s", url, curl_errorstr);
1532 /* fallthrough */
1533 default:
1534 ret = -1;
1535 }
1536 free(url);
1537 return ret;
1538 }
1539
1540 static void fetch_symref(const char *path, char **symref, struct object_id *oid)
1541 {
1542 char *url = xstrfmt("%s%s", repo->url, path);
1543 struct strbuf buffer = STRBUF_INIT;
1544 const char *name;
1545
1546 if (http_get_strbuf(url, &buffer, NULL) != HTTP_OK)
1547 die("Couldn't get %s for remote symref\n%s", url,
1548 curl_errorstr);
1549 free(url);
1550
1551 FREE_AND_NULL(*symref);
1552 oidclr(oid);
1553
1554 if (buffer.len == 0)
1555 return;
1556
1557 /* Cut off trailing newline. */
1558 strbuf_rtrim(&buffer);
1559
1560 /* If it's a symref, set the refname; otherwise try for a sha1 */
1561 if (skip_prefix(buffer.buf, "ref: ", &name)) {
1562 *symref = xmemdupz(name, buffer.len - (name - buffer.buf));
1563 } else {
1564 get_oid_hex(buffer.buf, oid);
1565 }
1566
1567 strbuf_release(&buffer);
1568 }
1569
1570 static int verify_merge_base(struct object_id *head_oid, struct ref *remote)
1571 {
1572 struct commit *head = lookup_commit_or_die(head_oid, "HEAD");
1573 struct commit *branch = lookup_commit_or_die(&remote->old_oid,
1574 remote->name);
1575
1576 return repo_in_merge_bases(the_repository, branch, head);
1577 }
1578
1579 static int delete_remote_branch(const char *pattern, int force)
1580 {
1581 struct ref *refs = remote_refs;
1582 struct ref *remote_ref = NULL;
1583 struct object_id head_oid;
1584 char *symref = NULL;
1585 int match;
1586 int patlen = strlen(pattern);
1587 int i;
1588 struct active_request_slot *slot;
1589 struct slot_results results;
1590 char *url;
1591
1592 /* Find the remote branch(es) matching the specified branch name */
1593 for (match = 0; refs; refs = refs->next) {
1594 char *name = refs->name;
1595 int namelen = strlen(name);
1596 if (namelen < patlen ||
1597 memcmp(name + namelen - patlen, pattern, patlen))
1598 continue;
1599 if (namelen != patlen && name[namelen - patlen - 1] != '/')
1600 continue;
1601 match++;
1602 remote_ref = refs;
1603 }
1604 if (match == 0)
1605 return error("No remote branch matches %s", pattern);
1606 if (match != 1)
1607 return error("More than one remote branch matches %s",
1608 pattern);
1609
1610 /*
1611 * Remote HEAD must be a symref (not exactly foolproof; a remote
1612 * symlink to a symref will look like a symref)
1613 */
1614 fetch_symref("HEAD", &symref, &head_oid);
1615 if (!symref)
1616 return error("Remote HEAD is not a symref");
1617
1618 /* Remote branch must not be the remote HEAD */
1619 for (i = 0; symref && i < MAXDEPTH; i++) {
1620 if (!strcmp(remote_ref->name, symref))
1621 return error("Remote branch %s is the current HEAD",
1622 remote_ref->name);
1623 fetch_symref(symref, &symref, &head_oid);
1624 }
1625
1626 /* Run extra sanity checks if delete is not forced */
1627 if (!force) {
1628 /* Remote HEAD must resolve to a known object */
1629 if (symref)
1630 return error("Remote HEAD symrefs too deep");
1631 if (is_null_oid(&head_oid))
1632 return error("Unable to resolve remote HEAD");
1633 if (!repo_has_object_file(the_repository, &head_oid))
1634 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", oid_to_hex(&head_oid));
1635
1636 /* Remote branch must resolve to a known object */
1637 if (is_null_oid(&remote_ref->old_oid))
1638 return error("Unable to resolve remote branch %s",
1639 remote_ref->name);
1640 if (!repo_has_object_file(the_repository, &remote_ref->old_oid))
1641 return error("Remote branch %s resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", remote_ref->name, oid_to_hex(&remote_ref->old_oid));
1642
1643 /* Remote branch must be an ancestor of remote HEAD */
1644 if (!verify_merge_base(&head_oid, remote_ref)) {
1645 return error("The branch '%s' is not an ancestor "
1646 "of your current HEAD.\n"
1647 "If you are sure you want to delete it,"
1648 " run:\n\t'git http-push -D %s %s'",
1649 remote_ref->name, repo->url, pattern);
1650 }
1651 }
1652
1653 /* Send delete request */
1654 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
1655 if (dry_run)
1656 return 0;
1657 url = xstrfmt("%s%s", repo->url, remote_ref->name);
1658 slot = get_active_slot();
1659 slot->results = &results;
1660 curl_setup_http_get(slot->curl, url, DAV_DELETE);
1661 if (start_active_slot(slot)) {
1662 run_active_slot(slot);
1663 free(url);
1664 if (results.curl_result != CURLE_OK)
1665 return error("DELETE request failed (%d/%ld)",
1666 results.curl_result, results.http_code);
1667 } else {
1668 free(url);
1669 return error("Unable to start DELETE request");
1670 }
1671
1672 return 0;
1673 }
1674
1675 static void run_request_queue(void)
1676 {
1677 is_running_queue = 1;
1678 fill_active_slots();
1679 add_fill_function(NULL, fill_active_slot);
1680 do {
1681 finish_all_active_slots();
1682 fill_active_slots();
1683 } while (request_queue_head && !aborted);
1684
1685 is_running_queue = 0;
1686 }
1687
1688 int cmd_main(int argc, const char **argv)
1689 {
1690 struct transfer_request *request;
1691 struct transfer_request *next_request;
1692 struct refspec rs = REFSPEC_INIT_PUSH;
1693 struct remote_lock *ref_lock = NULL;
1694 struct remote_lock *info_ref_lock = NULL;
1695 int delete_branch = 0;
1696 int force_delete = 0;
1697 int objects_to_send;
1698 int rc = 0;
1699 int i;
1700 int new_refs;
1701 struct ref *ref, *local_refs;
1702
1703 CALLOC_ARRAY(repo, 1);
1704
1705 argv++;
1706 for (i = 1; i < argc; i++, argv++) {
1707 const char *arg = *argv;
1708
1709 if (*arg == '-') {
1710 if (!strcmp(arg, "--all")) {
1711 push_all = MATCH_REFS_ALL;
1712 continue;
1713 }
1714 if (!strcmp(arg, "--force")) {
1715 force_all = 1;
1716 continue;
1717 }
1718 if (!strcmp(arg, "--dry-run")) {
1719 dry_run = 1;
1720 continue;
1721 }
1722 if (!strcmp(arg, "--helper-status")) {
1723 helper_status = 1;
1724 continue;
1725 }
1726 if (!strcmp(arg, "--verbose")) {
1727 push_verbosely = 1;
1728 http_is_verbose = 1;
1729 continue;
1730 }
1731 if (!strcmp(arg, "-d")) {
1732 delete_branch = 1;
1733 continue;
1734 }
1735 if (!strcmp(arg, "-D")) {
1736 delete_branch = 1;
1737 force_delete = 1;
1738 continue;
1739 }
1740 if (!strcmp(arg, "-h"))
1741 usage(http_push_usage);
1742 }
1743 if (!repo->url) {
1744 char *path = strstr(arg, "//");
1745 str_end_url_with_slash(arg, &repo->url);
1746 repo->path_len = strlen(repo->url);
1747 if (path) {
1748 repo->path = strchr(path+2, '/');
1749 if (repo->path)
1750 repo->path_len = strlen(repo->path);
1751 }
1752 continue;
1753 }
1754 refspec_appendn(&rs, argv, argc - i);
1755 break;
1756 }
1757
1758 if (!repo->url)
1759 usage(http_push_usage);
1760
1761 if (delete_branch && rs.nr != 1)
1762 die("You must specify only one branch name when deleting a remote branch");
1763
1764 setup_git_directory();
1765
1766 memset(remote_dir_exists, -1, 256);
1767
1768 http_init(NULL, repo->url, 1);
1769
1770 is_running_queue = 0;
1771
1772 /* Verify DAV compliance/lock support */
1773 if (!locking_available()) {
1774 rc = 1;
1775 goto cleanup;
1776 }
1777
1778 sigchain_push_common(remove_locks_on_signal);
1779
1780 /* Check whether the remote has server info files */
1781 repo->can_update_info_refs = 0;
1782 repo->has_info_refs = remote_exists("info/refs");
1783 repo->has_info_packs = remote_exists("objects/info/packs");
1784 if (repo->has_info_refs) {
1785 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
1786 if (info_ref_lock)
1787 repo->can_update_info_refs = 1;
1788 else {
1789 error("cannot lock existing info/refs");
1790 rc = 1;
1791 goto cleanup;
1792 }
1793 }
1794 if (repo->has_info_packs)
1795 fetch_indices();
1796
1797 /* Get a list of all local and remote heads to validate refspecs */
1798 local_refs = get_local_heads();
1799 fprintf(stderr, "Fetching remote heads...\n");
1800 get_dav_remote_heads();
1801 run_request_queue();
1802
1803 /* Remove a remote branch if -d or -D was specified */
1804 if (delete_branch) {
1805 const char *branch = rs.items[i].src;
1806 if (delete_remote_branch(branch, force_delete) == -1) {
1807 fprintf(stderr, "Unable to delete remote branch %s\n",
1808 branch);
1809 if (helper_status)
1810 printf("error %s cannot remove\n", branch);
1811 }
1812 goto cleanup;
1813 }
1814
1815 /* match them up */
1816 if (match_push_refs(local_refs, &remote_refs, &rs, push_all)) {
1817 rc = -1;
1818 goto cleanup;
1819 }
1820 if (!remote_refs) {
1821 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
1822 if (helper_status)
1823 printf("error null no match\n");
1824 rc = 0;
1825 goto cleanup;
1826 }
1827
1828 new_refs = 0;
1829 for (ref = remote_refs; ref; ref = ref->next) {
1830 struct rev_info revs;
1831 struct strvec commit_argv = STRVEC_INIT;
1832
1833 if (!ref->peer_ref)
1834 continue;
1835
1836 if (is_null_oid(&ref->peer_ref->new_oid)) {
1837 if (delete_remote_branch(ref->name, 1) == -1) {
1838 error("Could not remove %s", ref->name);
1839 if (helper_status)
1840 printf("error %s cannot remove\n", ref->name);
1841 rc = -4;
1842 }
1843 else if (helper_status)
1844 printf("ok %s\n", ref->name);
1845 new_refs++;
1846 continue;
1847 }
1848
1849 if (oideq(&ref->old_oid, &ref->peer_ref->new_oid)) {
1850 if (push_verbosely)
1851 fprintf(stderr, "'%s': up-to-date\n", ref->name);
1852 if (helper_status)
1853 printf("ok %s up to date\n", ref->name);
1854 continue;
1855 }
1856
1857 if (!force_all &&
1858 !is_null_oid(&ref->old_oid) &&
1859 !ref->force) {
1860 if (!repo_has_object_file(the_repository, &ref->old_oid) ||
1861 !ref_newer(&ref->peer_ref->new_oid,
1862 &ref->old_oid)) {
1863 /*
1864 * We do not have the remote ref, or
1865 * we know that the remote ref is not
1866 * an ancestor of what we are trying to
1867 * push. Either way this can be losing
1868 * commits at the remote end and likely
1869 * we were not up to date to begin with.
1870 */
1871 error("remote '%s' is not an ancestor of\n"
1872 "local '%s'.\n"
1873 "Maybe you are not up-to-date and "
1874 "need to pull first?",
1875 ref->name,
1876 ref->peer_ref->name);
1877 if (helper_status)
1878 printf("error %s non-fast forward\n", ref->name);
1879 rc = -2;
1880 continue;
1881 }
1882 }
1883 oidcpy(&ref->new_oid, &ref->peer_ref->new_oid);
1884 new_refs++;
1885
1886 fprintf(stderr, "updating '%s'", ref->name);
1887 if (strcmp(ref->name, ref->peer_ref->name))
1888 fprintf(stderr, " using '%s'", ref->peer_ref->name);
1889 fprintf(stderr, "\n from %s\n to %s\n",
1890 oid_to_hex(&ref->old_oid), oid_to_hex(&ref->new_oid));
1891 if (dry_run) {
1892 if (helper_status)
1893 printf("ok %s\n", ref->name);
1894 continue;
1895 }
1896
1897 /* Lock remote branch ref */
1898 ref_lock = lock_remote(ref->name, LOCK_TIME);
1899 if (!ref_lock) {
1900 fprintf(stderr, "Unable to lock remote branch %s\n",
1901 ref->name);
1902 if (helper_status)
1903 printf("error %s lock error\n", ref->name);
1904 rc = 1;
1905 continue;
1906 }
1907
1908 /* Set up revision info for this refspec */
1909 strvec_push(&commit_argv, ""); /* ignored */
1910 strvec_push(&commit_argv, "--objects");
1911 strvec_push(&commit_argv, oid_to_hex(&ref->new_oid));
1912 if (!push_all && !is_null_oid(&ref->old_oid))
1913 strvec_pushf(&commit_argv, "^%s",
1914 oid_to_hex(&ref->old_oid));
1915 repo_init_revisions(the_repository, &revs, setup_git_directory());
1916 setup_revisions(commit_argv.nr, commit_argv.v, &revs, NULL);
1917 revs.edge_hint = 0; /* just in case */
1918
1919 /* Generate a list of objects that need to be pushed */
1920 pushing = 0;
1921 if (prepare_revision_walk(&revs))
1922 die("revision walk setup failed");
1923 mark_edges_uninteresting(&revs, NULL, 0);
1924 objects_to_send = get_delta(&revs, ref_lock);
1925 finish_all_active_slots();
1926
1927 /* Push missing objects to remote, this would be a
1928 convenient time to pack them first if appropriate. */
1929 pushing = 1;
1930 if (objects_to_send)
1931 fprintf(stderr, " sending %d objects\n",
1932 objects_to_send);
1933
1934 run_request_queue();
1935
1936 /* Update the remote branch if all went well */
1937 if (aborted || !update_remote(&ref->new_oid, ref_lock))
1938 rc = 1;
1939
1940 if (!rc)
1941 fprintf(stderr, " done\n");
1942 if (helper_status)
1943 printf("%s %s\n", !rc ? "ok" : "error", ref->name);
1944 unlock_remote(ref_lock);
1945 check_locks();
1946 strvec_clear(&commit_argv);
1947 release_revisions(&revs);
1948 }
1949
1950 /* Update remote server info if appropriate */
1951 if (repo->has_info_refs && new_refs) {
1952 if (info_ref_lock && repo->can_update_info_refs) {
1953 fprintf(stderr, "Updating remote server info\n");
1954 if (!dry_run)
1955 update_remote_info_refs(info_ref_lock);
1956 } else {
1957 fprintf(stderr, "Unable to update server info\n");
1958 }
1959 }
1960
1961 cleanup:
1962 if (info_ref_lock)
1963 unlock_remote(info_ref_lock);
1964 free(repo);
1965
1966 http_cleanup();
1967
1968 request = request_queue_head;
1969 while (request != NULL) {
1970 next_request = request->next;
1971 release_request(request);
1972 request = next_request;
1973 }
1974
1975 return rc;
1976 }
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