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transport-helper: skip ls-refs if unnecessary
[git.git] / http-push.c
blob0353f9f5143d7fff3a2b4b11d02375255258319b
1 #include "cache.h"
2 #include "repository.h"
3 #include "commit.h"
4 #include "tag.h"
5 #include "blob.h"
6 #include "http.h"
7 #include "refs.h"
8 #include "diff.h"
9 #include "revision.h"
10 #include "exec-cmd.h"
11 #include "remote.h"
12 #include "list-objects.h"
13 #include "sigchain.h"
14 #include "argv-array.h"
15 #include "packfile.h"
16 #include "object-store.h"
17 #include "commit-reach.h"
18
19 #ifdef EXPAT_NEEDS_XMLPARSE_H
20 #include <xmlparse.h>
21 #else
22 #include <expat.h>
23 #endif
24
25 static const char http_push_usage[] =
26 "git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
27
28 #ifndef XML_STATUS_OK
29 enum XML_Status {
30 XML_STATUS_OK = 1,
31 XML_STATUS_ERROR = 0
32 };
33 #define XML_STATUS_OK 1
34 #define XML_STATUS_ERROR 0
35 #endif
36
37 #define PREV_BUF_SIZE 4096
38
39 /* DAV methods */
40 #define DAV_LOCK "LOCK"
41 #define DAV_MKCOL "MKCOL"
42 #define DAV_MOVE "MOVE"
43 #define DAV_PROPFIND "PROPFIND"
44 #define DAV_PUT "PUT"
45 #define DAV_UNLOCK "UNLOCK"
46 #define DAV_DELETE "DELETE"
47
48 /* DAV lock flags */
49 #define DAV_PROP_LOCKWR (1u << 0)
50 #define DAV_PROP_LOCKEX (1u << 1)
51 #define DAV_LOCK_OK (1u << 2)
52
53 /* DAV XML properties */
54 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
55 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
56 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
57 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
58 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
59 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
60 #define DAV_PROPFIND_RESP ".multistatus.response"
61 #define DAV_PROPFIND_NAME ".multistatus.response.href"
62 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
63
64 /* DAV request body templates */
65 #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>"
66 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
67 #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>"
68
69 #define LOCK_TIME 600
70 #define LOCK_REFRESH 30
71
72 /* Remember to update object flag allocation in object.h */
73 #define LOCAL (1u<<16)
74 #define REMOTE (1u<<17)
75 #define FETCHING (1u<<18)
76 #define PUSHING (1u<<19)
77
78 /* We allow "recursive" symbolic refs. Only within reason, though */
79 #define MAXDEPTH 5
80
81 static int pushing;
82 static int aborted;
83 static signed char remote_dir_exists[256];
84
85 static int push_verbosely;
86 static int push_all = MATCH_REFS_NONE;
87 static int force_all;
88 static int dry_run;
89 static int helper_status;
90
91 static struct object_list *objects;
92
93 struct repo {
94 char *url;
95 char *path;
96 int path_len;
97 int has_info_refs;
98 int can_update_info_refs;
99 int has_info_packs;
100 struct packed_git *packs;
101 struct remote_lock *locks;
102 };
103
104 static struct repo *repo;
105
106 enum transfer_state {
107 NEED_FETCH,
108 RUN_FETCH_LOOSE,
109 RUN_FETCH_PACKED,
110 NEED_PUSH,
111 RUN_MKCOL,
112 RUN_PUT,
113 RUN_MOVE,
114 ABORTED,
115 COMPLETE
116 };
117
118 struct transfer_request {
119 struct object *obj;
120 char *url;
121 char *dest;
122 struct remote_lock *lock;
123 struct curl_slist *headers;
124 struct buffer buffer;
125 enum transfer_state state;
126 CURLcode curl_result;
127 char errorstr[CURL_ERROR_SIZE];
128 long http_code;
129 void *userData;
130 struct active_request_slot *slot;
131 struct transfer_request *next;
132 };
133
134 static struct transfer_request *request_queue_head;
135
136 struct xml_ctx {
137 char *name;
138 int len;
139 char *cdata;
140 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
141 void *userData;
142 };
143
144 struct remote_lock {
145 char *url;
146 char *owner;
147 char *token;
148 char tmpfile_suffix[GIT_MAX_HEXSZ + 1];
149 time_t start_time;
150 long timeout;
151 int refreshing;
152 struct remote_lock *next;
153 };
154
155 /* Flags that control remote_ls processing */
156 #define PROCESS_FILES (1u << 0)
157 #define PROCESS_DIRS (1u << 1)
158 #define RECURSIVE (1u << 2)
159
160 /* Flags that remote_ls passes to callback functions */
161 #define IS_DIR (1u << 0)
162
163 struct remote_ls_ctx {
164 char *path;
165 void (*userFunc)(struct remote_ls_ctx *ls);
166 void *userData;
167 int flags;
168 char *dentry_name;
169 int dentry_flags;
170 struct remote_ls_ctx *parent;
171 };
172
173 /* get_dav_token_headers options */
174 enum dav_header_flag {
175 DAV_HEADER_IF = (1u << 0),
176 DAV_HEADER_LOCK = (1u << 1),
177 DAV_HEADER_TIMEOUT = (1u << 2)
178 };
179
180 static char *xml_entities(const char *s)
181 {
182 struct strbuf buf = STRBUF_INIT;
183 strbuf_addstr_xml_quoted(&buf, s);
184 return strbuf_detach(&buf, NULL);
185 }
186
187 static void curl_setup_http_get(CURL *curl, const char *url,
188 const char *custom_req)
189 {
190 curl_easy_setopt(curl, CURLOPT_HTTPGET, 1);
191 curl_easy_setopt(curl, CURLOPT_URL, url);
192 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
193 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_null);
194 }
195
196 static void curl_setup_http(CURL *curl, const char *url,
197 const char *custom_req, struct buffer *buffer,
198 curl_write_callback write_fn)
199 {
200 curl_easy_setopt(curl, CURLOPT_PUT, 1);
201 curl_easy_setopt(curl, CURLOPT_URL, url);
202 curl_easy_setopt(curl, CURLOPT_INFILE, buffer);
203 curl_easy_setopt(curl, CURLOPT_INFILESIZE, buffer->buf.len);
204 curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
205 #ifndef NO_CURL_IOCTL
206 curl_easy_setopt(curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
207 curl_easy_setopt(curl, CURLOPT_IOCTLDATA, buffer);
208 #endif
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 #ifdef USE_CURL_MULTI
252
253 static void start_fetch_loose(struct transfer_request *request)
254 {
255 struct active_request_slot *slot;
256 struct http_object_request *obj_req;
257
258 obj_req = new_http_object_request(repo->url, &request->obj->oid);
259 if (obj_req == NULL) {
260 request->state = ABORTED;
261 return;
262 }
263
264 slot = obj_req->slot;
265 slot->callback_func = process_response;
266 slot->callback_data = request;
267 request->slot = slot;
268 request->userData = obj_req;
269
270 /* Try to get the request started, abort the request on error */
271 request->state = RUN_FETCH_LOOSE;
272 if (!start_active_slot(slot)) {
273 fprintf(stderr, "Unable to start GET request\n");
274 repo->can_update_info_refs = 0;
275 release_http_object_request(obj_req);
276 release_request(request);
277 }
278 }
279
280 static void start_mkcol(struct transfer_request *request)
281 {
282 char *hex = oid_to_hex(&request->obj->oid);
283 struct active_request_slot *slot;
284
285 request->url = get_remote_object_url(repo->url, hex, 1);
286
287 slot = get_active_slot();
288 slot->callback_func = process_response;
289 slot->callback_data = request;
290 curl_setup_http_get(slot->curl, request->url, DAV_MKCOL);
291 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
292
293 if (start_active_slot(slot)) {
294 request->slot = slot;
295 request->state = RUN_MKCOL;
296 } else {
297 request->state = ABORTED;
298 FREE_AND_NULL(request->url);
299 }
300 }
301 #endif
302
303 static void start_fetch_packed(struct transfer_request *request)
304 {
305 struct packed_git *target;
306
307 struct transfer_request *check_request = request_queue_head;
308 struct http_pack_request *preq;
309
310 target = find_sha1_pack(request->obj->oid.hash, repo->packs);
311 if (!target) {
312 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", oid_to_hex(&request->obj->oid));
313 repo->can_update_info_refs = 0;
314 release_request(request);
315 return;
316 }
317
318 fprintf(stderr, "Fetching pack %s\n",
319 hash_to_hex(target->hash));
320 fprintf(stderr, " which contains %s\n", oid_to_hex(&request->obj->oid));
321
322 preq = new_http_pack_request(target, repo->url);
323 if (preq == NULL) {
324 repo->can_update_info_refs = 0;
325 return;
326 }
327 preq->lst = &repo->packs;
328
329 /* Make sure there isn't another open request for this pack */
330 while (check_request) {
331 if (check_request->state == RUN_FETCH_PACKED &&
332 !strcmp(check_request->url, preq->url)) {
333 release_http_pack_request(preq);
334 release_request(request);
335 return;
336 }
337 check_request = check_request->next;
338 }
339
340 preq->slot->callback_func = process_response;
341 preq->slot->callback_data = request;
342 request->slot = preq->slot;
343 request->userData = preq;
344
345 /* Try to get the request started, abort the request on error */
346 request->state = RUN_FETCH_PACKED;
347 if (!start_active_slot(preq->slot)) {
348 fprintf(stderr, "Unable to start GET request\n");
349 release_http_pack_request(preq);
350 repo->can_update_info_refs = 0;
351 release_request(request);
352 }
353 }
354
355 static void start_put(struct transfer_request *request)
356 {
357 char *hex = oid_to_hex(&request->obj->oid);
358 struct active_request_slot *slot;
359 struct strbuf buf = STRBUF_INIT;
360 enum object_type type;
361 char hdr[50];
362 void *unpacked;
363 unsigned long len;
364 int hdrlen;
365 ssize_t size;
366 git_zstream stream;
367
368 unpacked = read_object_file(&request->obj->oid, &type, &len);
369 hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %"PRIuMAX , type_name(type), (uintmax_t)len) + 1;
370
371 /* Set it up */
372 git_deflate_init(&stream, zlib_compression_level);
373 size = git_deflate_bound(&stream, len + hdrlen);
374 strbuf_init(&request->buffer.buf, size);
375 request->buffer.posn = 0;
376
377 /* Compress it */
378 stream.next_out = (unsigned char *)request->buffer.buf.buf;
379 stream.avail_out = size;
380
381 /* First header.. */
382 stream.next_in = (void *)hdr;
383 stream.avail_in = hdrlen;
384 while (git_deflate(&stream, 0) == Z_OK)
385 ; /* nothing */
386
387 /* Then the data itself.. */
388 stream.next_in = unpacked;
389 stream.avail_in = len;
390 while (git_deflate(&stream, Z_FINISH) == Z_OK)
391 ; /* nothing */
392 git_deflate_end(&stream);
393 free(unpacked);
394
395 request->buffer.buf.len = stream.total_out;
396
397 strbuf_addstr(&buf, "Destination: ");
398 append_remote_object_url(&buf, repo->url, hex, 0);
399 request->dest = strbuf_detach(&buf, NULL);
400
401 append_remote_object_url(&buf, repo->url, hex, 0);
402 strbuf_add(&buf, request->lock->tmpfile_suffix, the_hash_algo->hexsz + 1);
403 request->url = strbuf_detach(&buf, NULL);
404
405 slot = get_active_slot();
406 slot->callback_func = process_response;
407 slot->callback_data = request;
408 curl_setup_http(slot->curl, request->url, DAV_PUT,
409 &request->buffer, fwrite_null);
410
411 if (start_active_slot(slot)) {
412 request->slot = slot;
413 request->state = RUN_PUT;
414 } else {
415 request->state = ABORTED;
416 FREE_AND_NULL(request->url);
417 }
418 }
419
420 static void start_move(struct transfer_request *request)
421 {
422 struct active_request_slot *slot;
423 struct curl_slist *dav_headers = http_copy_default_headers();
424
425 slot = get_active_slot();
426 slot->callback_func = process_response;
427 slot->callback_data = request;
428 curl_setup_http_get(slot->curl, request->url, DAV_MOVE);
429 dav_headers = curl_slist_append(dav_headers, request->dest);
430 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
431 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
432
433 if (start_active_slot(slot)) {
434 request->slot = slot;
435 request->state = RUN_MOVE;
436 } else {
437 request->state = ABORTED;
438 FREE_AND_NULL(request->url);
439 }
440 }
441
442 static int refresh_lock(struct remote_lock *lock)
443 {
444 struct active_request_slot *slot;
445 struct slot_results results;
446 struct curl_slist *dav_headers;
447 int rc = 0;
448
449 lock->refreshing = 1;
450
451 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
452
453 slot = get_active_slot();
454 slot->results = &results;
455 curl_setup_http_get(slot->curl, lock->url, DAV_LOCK);
456 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
457
458 if (start_active_slot(slot)) {
459 run_active_slot(slot);
460 if (results.curl_result != CURLE_OK) {
461 fprintf(stderr, "LOCK HTTP error %ld\n",
462 results.http_code);
463 } else {
464 lock->start_time = time(NULL);
465 rc = 1;
466 }
467 }
468
469 lock->refreshing = 0;
470 curl_slist_free_all(dav_headers);
471
472 return rc;
473 }
474
475 static void check_locks(void)
476 {
477 struct remote_lock *lock = repo->locks;
478 time_t current_time = time(NULL);
479 int time_remaining;
480
481 while (lock) {
482 time_remaining = lock->start_time + lock->timeout -
483 current_time;
484 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
485 if (!refresh_lock(lock)) {
486 fprintf(stderr,
487 "Unable to refresh lock for %s\n",
488 lock->url);
489 aborted = 1;
490 return;
491 }
492 }
493 lock = lock->next;
494 }
495 }
496
497 static void release_request(struct transfer_request *request)
498 {
499 struct transfer_request *entry = request_queue_head;
500
501 if (request == request_queue_head) {
502 request_queue_head = request->next;
503 } else {
504 while (entry->next != NULL && entry->next != request)
505 entry = entry->next;
506 if (entry->next == request)
507 entry->next = entry->next->next;
508 }
509
510 free(request->url);
511 free(request);
512 }
513
514 static void finish_request(struct transfer_request *request)
515 {
516 struct http_pack_request *preq;
517 struct http_object_request *obj_req;
518
519 request->curl_result = request->slot->curl_result;
520 request->http_code = request->slot->http_code;
521 request->slot = NULL;
522
523 /* Keep locks active */
524 check_locks();
525
526 if (request->headers != NULL)
527 curl_slist_free_all(request->headers);
528
529 /* URL is reused for MOVE after PUT and used during FETCH */
530 if (request->state != RUN_PUT && request->state != RUN_FETCH_PACKED) {
531 FREE_AND_NULL(request->url);
532 }
533
534 if (request->state == RUN_MKCOL) {
535 if (request->curl_result == CURLE_OK ||
536 request->http_code == 405) {
537 remote_dir_exists[request->obj->oid.hash[0]] = 1;
538 start_put(request);
539 } else {
540 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
541 oid_to_hex(&request->obj->oid),
542 request->curl_result, request->http_code);
543 request->state = ABORTED;
544 aborted = 1;
545 }
546 } else if (request->state == RUN_PUT) {
547 if (request->curl_result == CURLE_OK) {
548 start_move(request);
549 } else {
550 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
551 oid_to_hex(&request->obj->oid),
552 request->curl_result, request->http_code);
553 request->state = ABORTED;
554 aborted = 1;
555 }
556 } else if (request->state == RUN_MOVE) {
557 if (request->curl_result == CURLE_OK) {
558 if (push_verbosely)
559 fprintf(stderr, " sent %s\n",
560 oid_to_hex(&request->obj->oid));
561 request->obj->flags |= REMOTE;
562 release_request(request);
563 } else {
564 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
565 oid_to_hex(&request->obj->oid),
566 request->curl_result, request->http_code);
567 request->state = ABORTED;
568 aborted = 1;
569 }
570 } else if (request->state == RUN_FETCH_LOOSE) {
571 obj_req = (struct http_object_request *)request->userData;
572
573 if (finish_http_object_request(obj_req) == 0)
574 if (obj_req->rename == 0)
575 request->obj->flags |= (LOCAL | REMOTE);
576
577 /* Try fetching packed if necessary */
578 if (request->obj->flags & LOCAL) {
579 release_http_object_request(obj_req);
580 release_request(request);
581 } else
582 start_fetch_packed(request);
583
584 } else if (request->state == RUN_FETCH_PACKED) {
585 int fail = 1;
586 if (request->curl_result != CURLE_OK) {
587 fprintf(stderr, "Unable to get pack file %s\n%s",
588 request->url, curl_errorstr);
589 } else {
590 preq = (struct http_pack_request *)request->userData;
591
592 if (preq) {
593 if (finish_http_pack_request(preq) == 0)
594 fail = 0;
595 release_http_pack_request(preq);
596 }
597 }
598 if (fail)
599 repo->can_update_info_refs = 0;
600 release_request(request);
601 }
602 }
603
604 #ifdef USE_CURL_MULTI
605 static int is_running_queue;
606 static int fill_active_slot(void *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 #endif
629
630 static void get_remote_object_list(unsigned char parent);
631
632 static void add_fetch_request(struct object *obj)
633 {
634 struct transfer_request *request;
635
636 check_locks();
637
638 /*
639 * Don't fetch the object if it's known to exist locally
640 * or is already in the request queue
641 */
642 if (remote_dir_exists[obj->oid.hash[0]] == -1)
643 get_remote_object_list(obj->oid.hash[0]);
644 if (obj->flags & (LOCAL | FETCHING))
645 return;
646
647 obj->flags |= FETCHING;
648 request = xmalloc(sizeof(*request));
649 request->obj = obj;
650 request->url = NULL;
651 request->lock = NULL;
652 request->headers = NULL;
653 request->state = NEED_FETCH;
654 request->next = request_queue_head;
655 request_queue_head = request;
656
657 #ifdef USE_CURL_MULTI
658 fill_active_slots();
659 step_active_slots();
660 #endif
661 }
662
663 static int add_send_request(struct object *obj, struct remote_lock *lock)
664 {
665 struct transfer_request *request;
666 struct packed_git *target;
667
668 /* Keep locks active */
669 check_locks();
670
671 /*
672 * Don't push the object if it's known to exist on the remote
673 * or is already in the request queue
674 */
675 if (remote_dir_exists[obj->oid.hash[0]] == -1)
676 get_remote_object_list(obj->oid.hash[0]);
677 if (obj->flags & (REMOTE | PUSHING))
678 return 0;
679 target = find_sha1_pack(obj->oid.hash, repo->packs);
680 if (target) {
681 obj->flags |= REMOTE;
682 return 0;
683 }
684
685 obj->flags |= PUSHING;
686 request = xmalloc(sizeof(*request));
687 request->obj = obj;
688 request->url = NULL;
689 request->lock = lock;
690 request->headers = NULL;
691 request->state = NEED_PUSH;
692 request->next = request_queue_head;
693 request_queue_head = request;
694
695 #ifdef USE_CURL_MULTI
696 fill_active_slots();
697 step_active_slots();
698 #endif
699
700 return 1;
701 }
702
703 static int fetch_indices(void)
704 {
705 int ret;
706
707 if (push_verbosely)
708 fprintf(stderr, "Getting pack list\n");
709
710 switch (http_get_info_packs(repo->url, &repo->packs)) {
711 case HTTP_OK:
712 case HTTP_MISSING_TARGET:
713 ret = 0;
714 break;
715 default:
716 ret = -1;
717 }
718
719 return ret;
720 }
721
722 static void one_remote_object(const struct object_id *oid)
723 {
724 struct object *obj;
725
726 obj = lookup_object(the_repository, oid);
727 if (!obj)
728 obj = parse_object(the_repository, oid);
729
730 /* Ignore remote objects that don't exist locally */
731 if (!obj)
732 return;
733
734 obj->flags |= REMOTE;
735 if (!object_list_contains(objects, obj))
736 object_list_insert(obj, &objects);
737 }
738
739 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
740 {
741 int *lock_flags = (int *)ctx->userData;
742
743 if (tag_closed) {
744 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
745 if ((*lock_flags & DAV_PROP_LOCKEX) &&
746 (*lock_flags & DAV_PROP_LOCKWR)) {
747 *lock_flags |= DAV_LOCK_OK;
748 }
749 *lock_flags &= DAV_LOCK_OK;
750 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
751 *lock_flags |= DAV_PROP_LOCKWR;
752 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
753 *lock_flags |= DAV_PROP_LOCKEX;
754 }
755 }
756 }
757
758 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
759 {
760 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
761 git_hash_ctx hash_ctx;
762 unsigned char lock_token_hash[GIT_MAX_RAWSZ];
763
764 if (tag_closed && ctx->cdata) {
765 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
766 lock->owner = xstrdup(ctx->cdata);
767 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
768 const char *arg;
769 if (skip_prefix(ctx->cdata, "Second-", &arg))
770 lock->timeout = strtol(arg, NULL, 10);
771 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
772 lock->token = xstrdup(ctx->cdata);
773
774 the_hash_algo->init_fn(&hash_ctx);
775 the_hash_algo->update_fn(&hash_ctx, lock->token, strlen(lock->token));
776 the_hash_algo->final_fn(lock_token_hash, &hash_ctx);
777
778 lock->tmpfile_suffix[0] = '_';
779 memcpy(lock->tmpfile_suffix + 1, hash_to_hex(lock_token_hash), the_hash_algo->hexsz);
780 }
781 }
782 }
783
784 static void one_remote_ref(const char *refname);
785
786 static void
787 xml_start_tag(void *userData, const char *name, const char **atts)
788 {
789 struct xml_ctx *ctx = (struct xml_ctx *)userData;
790 const char *c = strchr(name, ':');
791 int old_namelen, new_len;
792
793 if (c == NULL)
794 c = name;
795 else
796 c++;
797
798 old_namelen = strlen(ctx->name);
799 new_len = old_namelen + strlen(c) + 2;
800
801 if (new_len > ctx->len) {
802 ctx->name = xrealloc(ctx->name, new_len);
803 ctx->len = new_len;
804 }
805 xsnprintf(ctx->name + old_namelen, ctx->len - old_namelen, ".%s", c);
806
807 FREE_AND_NULL(ctx->cdata);
808
809 ctx->userFunc(ctx, 0);
810 }
811
812 static void
813 xml_end_tag(void *userData, const char *name)
814 {
815 struct xml_ctx *ctx = (struct xml_ctx *)userData;
816 const char *c = strchr(name, ':');
817 char *ep;
818
819 ctx->userFunc(ctx, 1);
820
821 if (c == NULL)
822 c = name;
823 else
824 c++;
825
826 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
827 *ep = 0;
828 }
829
830 static void
831 xml_cdata(void *userData, const XML_Char *s, int len)
832 {
833 struct xml_ctx *ctx = (struct xml_ctx *)userData;
834 free(ctx->cdata);
835 ctx->cdata = xmemdupz(s, len);
836 }
837
838 static struct remote_lock *lock_remote(const char *path, long timeout)
839 {
840 struct active_request_slot *slot;
841 struct slot_results results;
842 struct buffer out_buffer = { STRBUF_INIT, 0 };
843 struct strbuf in_buffer = STRBUF_INIT;
844 char *url;
845 char *ep;
846 char timeout_header[25];
847 struct remote_lock *lock = NULL;
848 struct curl_slist *dav_headers = http_copy_default_headers();
849 struct xml_ctx ctx;
850 char *escaped;
851
852 url = xstrfmt("%s%s", repo->url, path);
853
854 /* Make sure leading directories exist for the remote ref */
855 ep = strchr(url + strlen(repo->url) + 1, '/');
856 while (ep) {
857 char saved_character = ep[1];
858 ep[1] = '\0';
859 slot = get_active_slot();
860 slot->results = &results;
861 curl_setup_http_get(slot->curl, url, DAV_MKCOL);
862 if (start_active_slot(slot)) {
863 run_active_slot(slot);
864 if (results.curl_result != CURLE_OK &&
865 results.http_code != 405) {
866 fprintf(stderr,
867 "Unable to create branch path %s\n",
868 url);
869 free(url);
870 return NULL;
871 }
872 } else {
873 fprintf(stderr, "Unable to start MKCOL request\n");
874 free(url);
875 return NULL;
876 }
877 ep[1] = saved_character;
878 ep = strchr(ep + 1, '/');
879 }
880
881 escaped = xml_entities(ident_default_email());
882 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
883 free(escaped);
884
885 xsnprintf(timeout_header, sizeof(timeout_header), "Timeout: Second-%ld", timeout);
886 dav_headers = curl_slist_append(dav_headers, timeout_header);
887 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
888
889 slot = get_active_slot();
890 slot->results = &results;
891 curl_setup_http(slot->curl, url, DAV_LOCK, &out_buffer, fwrite_buffer);
892 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
893 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
894
895 lock = xcalloc(1, sizeof(*lock));
896 lock->timeout = -1;
897
898 if (start_active_slot(slot)) {
899 run_active_slot(slot);
900 if (results.curl_result == CURLE_OK) {
901 XML_Parser parser = XML_ParserCreate(NULL);
902 enum XML_Status result;
903 ctx.name = xcalloc(10, 1);
904 ctx.len = 0;
905 ctx.cdata = NULL;
906 ctx.userFunc = handle_new_lock_ctx;
907 ctx.userData = lock;
908 XML_SetUserData(parser, &ctx);
909 XML_SetElementHandler(parser, xml_start_tag,
910 xml_end_tag);
911 XML_SetCharacterDataHandler(parser, xml_cdata);
912 result = XML_Parse(parser, in_buffer.buf,
913 in_buffer.len, 1);
914 free(ctx.name);
915 if (result != XML_STATUS_OK) {
916 fprintf(stderr, "XML error: %s\n",
917 XML_ErrorString(
918 XML_GetErrorCode(parser)));
919 lock->timeout = -1;
920 }
921 XML_ParserFree(parser);
922 } else {
923 fprintf(stderr,
924 "error: curl result=%d, HTTP code=%ld\n",
925 results.curl_result, results.http_code);
926 }
927 } else {
928 fprintf(stderr, "Unable to start LOCK request\n");
929 }
930
931 curl_slist_free_all(dav_headers);
932 strbuf_release(&out_buffer.buf);
933 strbuf_release(&in_buffer);
934
935 if (lock->token == NULL || lock->timeout <= 0) {
936 free(lock->token);
937 free(lock->owner);
938 free(url);
939 FREE_AND_NULL(lock);
940 } else {
941 lock->url = url;
942 lock->start_time = time(NULL);
943 lock->next = repo->locks;
944 repo->locks = lock;
945 }
946
947 return lock;
948 }
949
950 static int unlock_remote(struct remote_lock *lock)
951 {
952 struct active_request_slot *slot;
953 struct slot_results results;
954 struct remote_lock *prev = repo->locks;
955 struct curl_slist *dav_headers;
956 int rc = 0;
957
958 dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
959
960 slot = get_active_slot();
961 slot->results = &results;
962 curl_setup_http_get(slot->curl, lock->url, DAV_UNLOCK);
963 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
964
965 if (start_active_slot(slot)) {
966 run_active_slot(slot);
967 if (results.curl_result == CURLE_OK)
968 rc = 1;
969 else
970 fprintf(stderr, "UNLOCK HTTP error %ld\n",
971 results.http_code);
972 } else {
973 fprintf(stderr, "Unable to start UNLOCK request\n");
974 }
975
976 curl_slist_free_all(dav_headers);
977
978 if (repo->locks == lock) {
979 repo->locks = lock->next;
980 } else {
981 while (prev && prev->next != lock)
982 prev = prev->next;
983 if (prev)
984 prev->next = prev->next->next;
985 }
986
987 free(lock->owner);
988 free(lock->url);
989 free(lock->token);
990 free(lock);
991
992 return rc;
993 }
994
995 static void remove_locks(void)
996 {
997 struct remote_lock *lock = repo->locks;
998
999 fprintf(stderr, "Removing remote locks...\n");
1000 while (lock) {
1001 struct remote_lock *next = lock->next;
1002 unlock_remote(lock);
1003 lock = next;
1004 }
1005 }
1006
1007 static void remove_locks_on_signal(int signo)
1008 {
1009 remove_locks();
1010 sigchain_pop(signo);
1011 raise(signo);
1012 }
1013
1014 static void remote_ls(const char *path, int flags,
1015 void (*userFunc)(struct remote_ls_ctx *ls),
1016 void *userData);
1017
1018 /* extract hex from sharded "xx/x{38}" filename */
1019 static int get_oid_hex_from_objpath(const char *path, struct object_id *oid)
1020 {
1021 if (strlen(path) != the_hash_algo->hexsz + 1)
1022 return -1;
1023
1024 if (hex_to_bytes(oid->hash, path, 1))
1025 return -1;
1026 path += 2;
1027 path++; /* skip '/' */
1028
1029 return hex_to_bytes(oid->hash + 1, path, the_hash_algo->rawsz - 1);
1030 }
1031
1032 static void process_ls_object(struct remote_ls_ctx *ls)
1033 {
1034 unsigned int *parent = (unsigned int *)ls->userData;
1035 const char *path = ls->dentry_name;
1036 struct object_id oid;
1037
1038 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1039 remote_dir_exists[*parent] = 1;
1040 return;
1041 }
1042
1043 if (!skip_prefix(path, "objects/", &path) ||
1044 get_oid_hex_from_objpath(path, &oid))
1045 return;
1046
1047 one_remote_object(&oid);
1048 }
1049
1050 static void process_ls_ref(struct remote_ls_ctx *ls)
1051 {
1052 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1053 fprintf(stderr, " %s\n", ls->dentry_name);
1054 return;
1055 }
1056
1057 if (!(ls->dentry_flags & IS_DIR))
1058 one_remote_ref(ls->dentry_name);
1059 }
1060
1061 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1062 {
1063 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1064
1065 if (tag_closed) {
1066 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1067 if (ls->dentry_flags & IS_DIR) {
1068
1069 /* ensure collection names end with slash */
1070 str_end_url_with_slash(ls->dentry_name, &ls->dentry_name);
1071
1072 if (ls->flags & PROCESS_DIRS) {
1073 ls->userFunc(ls);
1074 }
1075 if (strcmp(ls->dentry_name, ls->path) &&
1076 ls->flags & RECURSIVE) {
1077 remote_ls(ls->dentry_name,
1078 ls->flags,
1079 ls->userFunc,
1080 ls->userData);
1081 }
1082 } else if (ls->flags & PROCESS_FILES) {
1083 ls->userFunc(ls);
1084 }
1085 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1086 char *path = ctx->cdata;
1087 if (*ctx->cdata == 'h') {
1088 path = strstr(path, "//");
1089 if (path) {
1090 path = strchr(path+2, '/');
1091 }
1092 }
1093 if (path) {
1094 const char *url = repo->url;
1095 if (repo->path)
1096 url = repo->path;
1097 if (strncmp(path, url, repo->path_len))
1098 error("Parsed path '%s' does not match url: '%s'",
1099 path, url);
1100 else {
1101 path += repo->path_len;
1102 ls->dentry_name = xstrdup(path);
1103 }
1104 }
1105 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1106 ls->dentry_flags |= IS_DIR;
1107 }
1108 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1109 FREE_AND_NULL(ls->dentry_name);
1110 ls->dentry_flags = 0;
1111 }
1112 }
1113
1114 /*
1115 * NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it
1116 * should _only_ heed the information from that file, instead of trying to
1117 * determine the refs from the remote file system (badly: it does not even
1118 * know about packed-refs).
1119 */
1120 static void remote_ls(const char *path, int flags,
1121 void (*userFunc)(struct remote_ls_ctx *ls),
1122 void *userData)
1123 {
1124 char *url = xstrfmt("%s%s", repo->url, path);
1125 struct active_request_slot *slot;
1126 struct slot_results results;
1127 struct strbuf in_buffer = STRBUF_INIT;
1128 struct buffer out_buffer = { STRBUF_INIT, 0 };
1129 struct curl_slist *dav_headers = http_copy_default_headers();
1130 struct xml_ctx ctx;
1131 struct remote_ls_ctx ls;
1132
1133 ls.flags = flags;
1134 ls.path = xstrdup(path);
1135 ls.dentry_name = NULL;
1136 ls.dentry_flags = 0;
1137 ls.userData = userData;
1138 ls.userFunc = userFunc;
1139
1140 strbuf_addstr(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1141
1142 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1143 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1144
1145 slot = get_active_slot();
1146 slot->results = &results;
1147 curl_setup_http(slot->curl, url, DAV_PROPFIND,
1148 &out_buffer, fwrite_buffer);
1149 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1150 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1151
1152 if (start_active_slot(slot)) {
1153 run_active_slot(slot);
1154 if (results.curl_result == CURLE_OK) {
1155 XML_Parser parser = XML_ParserCreate(NULL);
1156 enum XML_Status result;
1157 ctx.name = xcalloc(10, 1);
1158 ctx.len = 0;
1159 ctx.cdata = NULL;
1160 ctx.userFunc = handle_remote_ls_ctx;
1161 ctx.userData = &ls;
1162 XML_SetUserData(parser, &ctx);
1163 XML_SetElementHandler(parser, xml_start_tag,
1164 xml_end_tag);
1165 XML_SetCharacterDataHandler(parser, xml_cdata);
1166 result = XML_Parse(parser, in_buffer.buf,
1167 in_buffer.len, 1);
1168 free(ctx.name);
1169
1170 if (result != XML_STATUS_OK) {
1171 fprintf(stderr, "XML error: %s\n",
1172 XML_ErrorString(
1173 XML_GetErrorCode(parser)));
1174 }
1175 XML_ParserFree(parser);
1176 }
1177 } else {
1178 fprintf(stderr, "Unable to start PROPFIND request\n");
1179 }
1180
1181 free(ls.path);
1182 free(url);
1183 strbuf_release(&out_buffer.buf);
1184 strbuf_release(&in_buffer);
1185 curl_slist_free_all(dav_headers);
1186 }
1187
1188 static void get_remote_object_list(unsigned char parent)
1189 {
1190 char path[] = "objects/XX/";
1191 static const char hex[] = "0123456789abcdef";
1192 unsigned int val = parent;
1193
1194 path[8] = hex[val >> 4];
1195 path[9] = hex[val & 0xf];
1196 remote_dir_exists[val] = 0;
1197 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1198 process_ls_object, &val);
1199 }
1200
1201 static int locking_available(void)
1202 {
1203 struct active_request_slot *slot;
1204 struct slot_results results;
1205 struct strbuf in_buffer = STRBUF_INIT;
1206 struct buffer out_buffer = { STRBUF_INIT, 0 };
1207 struct curl_slist *dav_headers = http_copy_default_headers();
1208 struct xml_ctx ctx;
1209 int lock_flags = 0;
1210 char *escaped;
1211
1212 escaped = xml_entities(repo->url);
1213 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
1214 free(escaped);
1215
1216 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1217 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1218
1219 slot = get_active_slot();
1220 slot->results = &results;
1221 curl_setup_http(slot->curl, repo->url, DAV_PROPFIND,
1222 &out_buffer, fwrite_buffer);
1223 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1224 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1225
1226 if (start_active_slot(slot)) {
1227 run_active_slot(slot);
1228 if (results.curl_result == CURLE_OK) {
1229 XML_Parser parser = XML_ParserCreate(NULL);
1230 enum XML_Status result;
1231 ctx.name = xcalloc(10, 1);
1232 ctx.len = 0;
1233 ctx.cdata = NULL;
1234 ctx.userFunc = handle_lockprop_ctx;
1235 ctx.userData = &lock_flags;
1236 XML_SetUserData(parser, &ctx);
1237 XML_SetElementHandler(parser, xml_start_tag,
1238 xml_end_tag);
1239 result = XML_Parse(parser, in_buffer.buf,
1240 in_buffer.len, 1);
1241 free(ctx.name);
1242
1243 if (result != XML_STATUS_OK) {
1244 fprintf(stderr, "XML error: %s\n",
1245 XML_ErrorString(
1246 XML_GetErrorCode(parser)));
1247 lock_flags = 0;
1248 }
1249 XML_ParserFree(parser);
1250 if (!lock_flags)
1251 error("no DAV locking support on %s",
1252 repo->url);
1253
1254 } else {
1255 error("Cannot access URL %s, return code %d",
1256 repo->url, results.curl_result);
1257 lock_flags = 0;
1258 }
1259 } else {
1260 error("Unable to start PROPFIND request on %s", repo->url);
1261 }
1262
1263 strbuf_release(&out_buffer.buf);
1264 strbuf_release(&in_buffer);
1265 curl_slist_free_all(dav_headers);
1266
1267 return lock_flags;
1268 }
1269
1270 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1271 {
1272 struct object_list *entry = xmalloc(sizeof(struct object_list));
1273 entry->item = obj;
1274 entry->next = *p;
1275 *p = entry;
1276 return &entry->next;
1277 }
1278
1279 static struct object_list **process_blob(struct blob *blob,
1280 struct object_list **p)
1281 {
1282 struct object *obj = &blob->object;
1283
1284 obj->flags |= LOCAL;
1285
1286 if (obj->flags & (UNINTERESTING | SEEN))
1287 return p;
1288
1289 obj->flags |= SEEN;
1290 return add_one_object(obj, p);
1291 }
1292
1293 static struct object_list **process_tree(struct tree *tree,
1294 struct object_list **p)
1295 {
1296 struct object *obj = &tree->object;
1297 struct tree_desc desc;
1298 struct name_entry entry;
1299
1300 obj->flags |= LOCAL;
1301
1302 if (obj->flags & (UNINTERESTING | SEEN))
1303 return p;
1304 if (parse_tree(tree) < 0)
1305 die("bad tree object %s", oid_to_hex(&obj->oid));
1306
1307 obj->flags |= SEEN;
1308 p = add_one_object(obj, p);
1309
1310 init_tree_desc(&desc, tree->buffer, tree->size);
1311
1312 while (tree_entry(&desc, &entry))
1313 switch (object_type(entry.mode)) {
1314 case OBJ_TREE:
1315 p = process_tree(lookup_tree(the_repository, &entry.oid),
1316 p);
1317 break;
1318 case OBJ_BLOB:
1319 p = process_blob(lookup_blob(the_repository, &entry.oid),
1320 p);
1321 break;
1322 default:
1323 /* Subproject commit - not in this repository */
1324 break;
1325 }
1326
1327 free_tree_buffer(tree);
1328 return p;
1329 }
1330
1331 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1332 {
1333 int i;
1334 struct commit *commit;
1335 struct object_list **p = &objects;
1336 int count = 0;
1337
1338 while ((commit = get_revision(revs)) != NULL) {
1339 p = process_tree(get_commit_tree(commit), p);
1340 commit->object.flags |= LOCAL;
1341 if (!(commit->object.flags & UNINTERESTING))
1342 count += add_send_request(&commit->object, lock);
1343 }
1344
1345 for (i = 0; i < revs->pending.nr; i++) {
1346 struct object_array_entry *entry = revs->pending.objects + i;
1347 struct object *obj = entry->item;
1348 const char *name = entry->name;
1349
1350 if (obj->flags & (UNINTERESTING | SEEN))
1351 continue;
1352 if (obj->type == OBJ_TAG) {
1353 obj->flags |= SEEN;
1354 p = add_one_object(obj, p);
1355 continue;
1356 }
1357 if (obj->type == OBJ_TREE) {
1358 p = process_tree((struct tree *)obj, p);
1359 continue;
1360 }
1361 if (obj->type == OBJ_BLOB) {
1362 p = process_blob((struct blob *)obj, p);
1363 continue;
1364 }
1365 die("unknown pending object %s (%s)", oid_to_hex(&obj->oid), name);
1366 }
1367
1368 while (objects) {
1369 if (!(objects->item->flags & UNINTERESTING))
1370 count += add_send_request(objects->item, lock);
1371 objects = objects->next;
1372 }
1373
1374 return count;
1375 }
1376
1377 static int update_remote(const struct object_id *oid, struct remote_lock *lock)
1378 {
1379 struct active_request_slot *slot;
1380 struct slot_results results;
1381 struct buffer out_buffer = { STRBUF_INIT, 0 };
1382 struct curl_slist *dav_headers;
1383
1384 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1385
1386 strbuf_addf(&out_buffer.buf, "%s\n", oid_to_hex(oid));
1387
1388 slot = get_active_slot();
1389 slot->results = &results;
1390 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1391 &out_buffer, fwrite_null);
1392 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1393
1394 if (start_active_slot(slot)) {
1395 run_active_slot(slot);
1396 strbuf_release(&out_buffer.buf);
1397 if (results.curl_result != CURLE_OK) {
1398 fprintf(stderr,
1399 "PUT error: curl result=%d, HTTP code=%ld\n",
1400 results.curl_result, results.http_code);
1401 /* We should attempt recovery? */
1402 return 0;
1403 }
1404 } else {
1405 strbuf_release(&out_buffer.buf);
1406 fprintf(stderr, "Unable to start PUT request\n");
1407 return 0;
1408 }
1409
1410 return 1;
1411 }
1412
1413 static struct ref *remote_refs;
1414
1415 static void one_remote_ref(const char *refname)
1416 {
1417 struct ref *ref;
1418 struct object *obj;
1419
1420 ref = alloc_ref(refname);
1421
1422 if (http_fetch_ref(repo->url, ref) != 0) {
1423 fprintf(stderr,
1424 "Unable to fetch ref %s from %s\n",
1425 refname, repo->url);
1426 free(ref);
1427 return;
1428 }
1429
1430 /*
1431 * Fetch a copy of the object if it doesn't exist locally - it
1432 * may be required for updating server info later.
1433 */
1434 if (repo->can_update_info_refs && !has_object_file(&ref->old_oid)) {
1435 obj = lookup_unknown_object(&ref->old_oid);
1436 fprintf(stderr, " fetch %s for %s\n",
1437 oid_to_hex(&ref->old_oid), refname);
1438 add_fetch_request(obj);
1439 }
1440
1441 ref->next = remote_refs;
1442 remote_refs = ref;
1443 }
1444
1445 static void get_dav_remote_heads(void)
1446 {
1447 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1448 }
1449
1450 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1451 {
1452 struct strbuf *buf = (struct strbuf *)ls->userData;
1453 struct object *o;
1454 struct ref *ref;
1455
1456 ref = alloc_ref(ls->dentry_name);
1457
1458 if (http_fetch_ref(repo->url, ref) != 0) {
1459 fprintf(stderr,
1460 "Unable to fetch ref %s from %s\n",
1461 ls->dentry_name, repo->url);
1462 aborted = 1;
1463 free(ref);
1464 return;
1465 }
1466
1467 o = parse_object(the_repository, &ref->old_oid);
1468 if (!o) {
1469 fprintf(stderr,
1470 "Unable to parse object %s for remote ref %s\n",
1471 oid_to_hex(&ref->old_oid), ls->dentry_name);
1472 aborted = 1;
1473 free(ref);
1474 return;
1475 }
1476
1477 strbuf_addf(buf, "%s\t%s\n",
1478 oid_to_hex(&ref->old_oid), ls->dentry_name);
1479
1480 if (o->type == OBJ_TAG) {
1481 o = deref_tag(the_repository, o, ls->dentry_name, 0);
1482 if (o)
1483 strbuf_addf(buf, "%s\t%s^{}\n",
1484 oid_to_hex(&o->oid), ls->dentry_name);
1485 }
1486 free(ref);
1487 }
1488
1489 static void update_remote_info_refs(struct remote_lock *lock)
1490 {
1491 struct buffer buffer = { STRBUF_INIT, 0 };
1492 struct active_request_slot *slot;
1493 struct slot_results results;
1494 struct curl_slist *dav_headers;
1495
1496 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1497 add_remote_info_ref, &buffer.buf);
1498 if (!aborted) {
1499 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1500
1501 slot = get_active_slot();
1502 slot->results = &results;
1503 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1504 &buffer, fwrite_null);
1505 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1506
1507 if (start_active_slot(slot)) {
1508 run_active_slot(slot);
1509 if (results.curl_result != CURLE_OK) {
1510 fprintf(stderr,
1511 "PUT error: curl result=%d, HTTP code=%ld\n",
1512 results.curl_result, results.http_code);
1513 }
1514 }
1515 }
1516 strbuf_release(&buffer.buf);
1517 }
1518
1519 static int remote_exists(const char *path)
1520 {
1521 char *url = xstrfmt("%s%s", repo->url, path);
1522 int ret;
1523
1524
1525 switch (http_get_strbuf(url, NULL, NULL)) {
1526 case HTTP_OK:
1527 ret = 1;
1528 break;
1529 case HTTP_MISSING_TARGET:
1530 ret = 0;
1531 break;
1532 case HTTP_ERROR:
1533 error("unable to access '%s': %s", url, curl_errorstr);
1534 /* fallthrough */
1535 default:
1536 ret = -1;
1537 }
1538 free(url);
1539 return ret;
1540 }
1541
1542 static void fetch_symref(const char *path, char **symref, struct object_id *oid)
1543 {
1544 char *url = xstrfmt("%s%s", repo->url, path);
1545 struct strbuf buffer = STRBUF_INIT;
1546 const char *name;
1547
1548 if (http_get_strbuf(url, &buffer, NULL) != HTTP_OK)
1549 die("Couldn't get %s for remote symref\n%s", url,
1550 curl_errorstr);
1551 free(url);
1552
1553 FREE_AND_NULL(*symref);
1554 oidclr(oid);
1555
1556 if (buffer.len == 0)
1557 return;
1558
1559 /* Cut off trailing newline. */
1560 strbuf_rtrim(&buffer);
1561
1562 /* If it's a symref, set the refname; otherwise try for a sha1 */
1563 if (skip_prefix(buffer.buf, "ref: ", &name)) {
1564 *symref = xmemdupz(name, buffer.len - (name - buffer.buf));
1565 } else {
1566 get_oid_hex(buffer.buf, oid);
1567 }
1568
1569 strbuf_release(&buffer);
1570 }
1571
1572 static int verify_merge_base(struct object_id *head_oid, struct ref *remote)
1573 {
1574 struct commit *head = lookup_commit_or_die(head_oid, "HEAD");
1575 struct commit *branch = lookup_commit_or_die(&remote->old_oid,
1576 remote->name);
1577
1578 return in_merge_bases(branch, head);
1579 }
1580
1581 static int delete_remote_branch(const char *pattern, int force)
1582 {
1583 struct ref *refs = remote_refs;
1584 struct ref *remote_ref = NULL;
1585 struct object_id head_oid;
1586 char *symref = NULL;
1587 int match;
1588 int patlen = strlen(pattern);
1589 int i;
1590 struct active_request_slot *slot;
1591 struct slot_results results;
1592 char *url;
1593
1594 /* Find the remote branch(es) matching the specified branch name */
1595 for (match = 0; refs; refs = refs->next) {
1596 char *name = refs->name;
1597 int namelen = strlen(name);
1598 if (namelen < patlen ||
1599 memcmp(name + namelen - patlen, pattern, patlen))
1600 continue;
1601 if (namelen != patlen && name[namelen - patlen - 1] != '/')
1602 continue;
1603 match++;
1604 remote_ref = refs;
1605 }
1606 if (match == 0)
1607 return error("No remote branch matches %s", pattern);
1608 if (match != 1)
1609 return error("More than one remote branch matches %s",
1610 pattern);
1611
1612 /*
1613 * Remote HEAD must be a symref (not exactly foolproof; a remote
1614 * symlink to a symref will look like a symref)
1615 */
1616 fetch_symref("HEAD", &symref, &head_oid);
1617 if (!symref)
1618 return error("Remote HEAD is not a symref");
1619
1620 /* Remote branch must not be the remote HEAD */
1621 for (i = 0; symref && i < MAXDEPTH; i++) {
1622 if (!strcmp(remote_ref->name, symref))
1623 return error("Remote branch %s is the current HEAD",
1624 remote_ref->name);
1625 fetch_symref(symref, &symref, &head_oid);
1626 }
1627
1628 /* Run extra sanity checks if delete is not forced */
1629 if (!force) {
1630 /* Remote HEAD must resolve to a known object */
1631 if (symref)
1632 return error("Remote HEAD symrefs too deep");
1633 if (is_null_oid(&head_oid))
1634 return error("Unable to resolve remote HEAD");
1635 if (!has_object_file(&head_oid))
1636 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", oid_to_hex(&head_oid));
1637
1638 /* Remote branch must resolve to a known object */
1639 if (is_null_oid(&remote_ref->old_oid))
1640 return error("Unable to resolve remote branch %s",
1641 remote_ref->name);
1642 if (!has_object_file(&remote_ref->old_oid))
1643 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));
1644
1645 /* Remote branch must be an ancestor of remote HEAD */
1646 if (!verify_merge_base(&head_oid, remote_ref)) {
1647 return error("The branch '%s' is not an ancestor "
1648 "of your current HEAD.\n"
1649 "If you are sure you want to delete it,"
1650 " run:\n\t'git http-push -D %s %s'",
1651 remote_ref->name, repo->url, pattern);
1652 }
1653 }
1654
1655 /* Send delete request */
1656 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
1657 if (dry_run)
1658 return 0;
1659 url = xstrfmt("%s%s", repo->url, remote_ref->name);
1660 slot = get_active_slot();
1661 slot->results = &results;
1662 curl_setup_http_get(slot->curl, url, DAV_DELETE);
1663 if (start_active_slot(slot)) {
1664 run_active_slot(slot);
1665 free(url);
1666 if (results.curl_result != CURLE_OK)
1667 return error("DELETE request failed (%d/%ld)",
1668 results.curl_result, results.http_code);
1669 } else {
1670 free(url);
1671 return error("Unable to start DELETE request");
1672 }
1673
1674 return 0;
1675 }
1676
1677 static void run_request_queue(void)
1678 {
1679 #ifdef USE_CURL_MULTI
1680 is_running_queue = 1;
1681 fill_active_slots();
1682 add_fill_function(NULL, fill_active_slot);
1683 #endif
1684 do {
1685 finish_all_active_slots();
1686 #ifdef USE_CURL_MULTI
1687 fill_active_slots();
1688 #endif
1689 } while (request_queue_head && !aborted);
1690
1691 #ifdef USE_CURL_MULTI
1692 is_running_queue = 0;
1693 #endif
1694 }
1695
1696 int cmd_main(int argc, const char **argv)
1697 {
1698 struct transfer_request *request;
1699 struct transfer_request *next_request;
1700 struct refspec rs = REFSPEC_INIT_PUSH;
1701 struct remote_lock *ref_lock = NULL;
1702 struct remote_lock *info_ref_lock = NULL;
1703 struct rev_info revs;
1704 int delete_branch = 0;
1705 int force_delete = 0;
1706 int objects_to_send;
1707 int rc = 0;
1708 int i;
1709 int new_refs;
1710 struct ref *ref, *local_refs;
1711
1712 repo = xcalloc(1, sizeof(*repo));
1713
1714 argv++;
1715 for (i = 1; i < argc; i++, argv++) {
1716 const char *arg = *argv;
1717
1718 if (*arg == '-') {
1719 if (!strcmp(arg, "--all")) {
1720 push_all = MATCH_REFS_ALL;
1721 continue;
1722 }
1723 if (!strcmp(arg, "--force")) {
1724 force_all = 1;
1725 continue;
1726 }
1727 if (!strcmp(arg, "--dry-run")) {
1728 dry_run = 1;
1729 continue;
1730 }
1731 if (!strcmp(arg, "--helper-status")) {
1732 helper_status = 1;
1733 continue;
1734 }
1735 if (!strcmp(arg, "--verbose")) {
1736 push_verbosely = 1;
1737 http_is_verbose = 1;
1738 continue;
1739 }
1740 if (!strcmp(arg, "-d")) {
1741 delete_branch = 1;
1742 continue;
1743 }
1744 if (!strcmp(arg, "-D")) {
1745 delete_branch = 1;
1746 force_delete = 1;
1747 continue;
1748 }
1749 if (!strcmp(arg, "-h"))
1750 usage(http_push_usage);
1751 }
1752 if (!repo->url) {
1753 char *path = strstr(arg, "//");
1754 str_end_url_with_slash(arg, &repo->url);
1755 repo->path_len = strlen(repo->url);
1756 if (path) {
1757 repo->path = strchr(path+2, '/');
1758 if (repo->path)
1759 repo->path_len = strlen(repo->path);
1760 }
1761 continue;
1762 }
1763 refspec_appendn(&rs, argv, argc - i);
1764 break;
1765 }
1766
1767 #ifndef USE_CURL_MULTI
1768 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
1769 #endif
1770
1771 if (!repo->url)
1772 usage(http_push_usage);
1773
1774 if (delete_branch && rs.nr != 1)
1775 die("You must specify only one branch name when deleting a remote branch");
1776
1777 setup_git_directory();
1778
1779 memset(remote_dir_exists, -1, 256);
1780
1781 http_init(NULL, repo->url, 1);
1782
1783 #ifdef USE_CURL_MULTI
1784 is_running_queue = 0;
1785 #endif
1786
1787 /* Verify DAV compliance/lock support */
1788 if (!locking_available()) {
1789 rc = 1;
1790 goto cleanup;
1791 }
1792
1793 sigchain_push_common(remove_locks_on_signal);
1794
1795 /* Check whether the remote has server info files */
1796 repo->can_update_info_refs = 0;
1797 repo->has_info_refs = remote_exists("info/refs");
1798 repo->has_info_packs = remote_exists("objects/info/packs");
1799 if (repo->has_info_refs) {
1800 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
1801 if (info_ref_lock)
1802 repo->can_update_info_refs = 1;
1803 else {
1804 error("cannot lock existing info/refs");
1805 rc = 1;
1806 goto cleanup;
1807 }
1808 }
1809 if (repo->has_info_packs)
1810 fetch_indices();
1811
1812 /* Get a list of all local and remote heads to validate refspecs */
1813 local_refs = get_local_heads();
1814 fprintf(stderr, "Fetching remote heads...\n");
1815 get_dav_remote_heads();
1816 run_request_queue();
1817
1818 /* Remove a remote branch if -d or -D was specified */
1819 if (delete_branch) {
1820 const char *branch = rs.items[i].src;
1821 if (delete_remote_branch(branch, force_delete) == -1) {
1822 fprintf(stderr, "Unable to delete remote branch %s\n",
1823 branch);
1824 if (helper_status)
1825 printf("error %s cannot remove\n", branch);
1826 }
1827 goto cleanup;
1828 }
1829
1830 /* match them up */
1831 if (match_push_refs(local_refs, &remote_refs, &rs, push_all)) {
1832 rc = -1;
1833 goto cleanup;
1834 }
1835 if (!remote_refs) {
1836 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
1837 if (helper_status)
1838 printf("error null no match\n");
1839 rc = 0;
1840 goto cleanup;
1841 }
1842
1843 new_refs = 0;
1844 for (ref = remote_refs; ref; ref = ref->next) {
1845 struct argv_array commit_argv = ARGV_ARRAY_INIT;
1846
1847 if (!ref->peer_ref)
1848 continue;
1849
1850 if (is_null_oid(&ref->peer_ref->new_oid)) {
1851 if (delete_remote_branch(ref->name, 1) == -1) {
1852 error("Could not remove %s", ref->name);
1853 if (helper_status)
1854 printf("error %s cannot remove\n", ref->name);
1855 rc = -4;
1856 }
1857 else if (helper_status)
1858 printf("ok %s\n", ref->name);
1859 new_refs++;
1860 continue;
1861 }
1862
1863 if (oideq(&ref->old_oid, &ref->peer_ref->new_oid)) {
1864 if (push_verbosely)
1865 fprintf(stderr, "'%s': up-to-date\n", ref->name);
1866 if (helper_status)
1867 printf("ok %s up to date\n", ref->name);
1868 continue;
1869 }
1870
1871 if (!force_all &&
1872 !is_null_oid(&ref->old_oid) &&
1873 !ref->force) {
1874 if (!has_object_file(&ref->old_oid) ||
1875 !ref_newer(&ref->peer_ref->new_oid,
1876 &ref->old_oid)) {
1877 /*
1878 * We do not have the remote ref, or
1879 * we know that the remote ref is not
1880 * an ancestor of what we are trying to
1881 * push. Either way this can be losing
1882 * commits at the remote end and likely
1883 * we were not up to date to begin with.
1884 */
1885 error("remote '%s' is not an ancestor of\n"
1886 "local '%s'.\n"
1887 "Maybe you are not up-to-date and "
1888 "need to pull first?",
1889 ref->name,
1890 ref->peer_ref->name);
1891 if (helper_status)
1892 printf("error %s non-fast forward\n", ref->name);
1893 rc = -2;
1894 continue;
1895 }
1896 }
1897 oidcpy(&ref->new_oid, &ref->peer_ref->new_oid);
1898 new_refs++;
1899
1900 fprintf(stderr, "updating '%s'", ref->name);
1901 if (strcmp(ref->name, ref->peer_ref->name))
1902 fprintf(stderr, " using '%s'", ref->peer_ref->name);
1903 fprintf(stderr, "\n from %s\n to %s\n",
1904 oid_to_hex(&ref->old_oid), oid_to_hex(&ref->new_oid));
1905 if (dry_run) {
1906 if (helper_status)
1907 printf("ok %s\n", ref->name);
1908 continue;
1909 }
1910
1911 /* Lock remote branch ref */
1912 ref_lock = lock_remote(ref->name, LOCK_TIME);
1913 if (ref_lock == NULL) {
1914 fprintf(stderr, "Unable to lock remote branch %s\n",
1915 ref->name);
1916 if (helper_status)
1917 printf("error %s lock error\n", ref->name);
1918 rc = 1;
1919 continue;
1920 }
1921
1922 /* Set up revision info for this refspec */
1923 argv_array_push(&commit_argv, ""); /* ignored */
1924 argv_array_push(&commit_argv, "--objects");
1925 argv_array_push(&commit_argv, oid_to_hex(&ref->new_oid));
1926 if (!push_all && !is_null_oid(&ref->old_oid))
1927 argv_array_pushf(&commit_argv, "^%s",
1928 oid_to_hex(&ref->old_oid));
1929 repo_init_revisions(the_repository, &revs, setup_git_directory());
1930 setup_revisions(commit_argv.argc, commit_argv.argv, &revs, NULL);
1931 revs.edge_hint = 0; /* just in case */
1932
1933 /* Generate a list of objects that need to be pushed */
1934 pushing = 0;
1935 if (prepare_revision_walk(&revs))
1936 die("revision walk setup failed");
1937 mark_edges_uninteresting(&revs, NULL, 0);
1938 objects_to_send = get_delta(&revs, ref_lock);
1939 finish_all_active_slots();
1940
1941 /* Push missing objects to remote, this would be a
1942 convenient time to pack them first if appropriate. */
1943 pushing = 1;
1944 if (objects_to_send)
1945 fprintf(stderr, " sending %d objects\n",
1946 objects_to_send);
1947
1948 run_request_queue();
1949
1950 /* Update the remote branch if all went well */
1951 if (aborted || !update_remote(&ref->new_oid, ref_lock))
1952 rc = 1;
1953
1954 if (!rc)
1955 fprintf(stderr, " done\n");
1956 if (helper_status)
1957 printf("%s %s\n", !rc ? "ok" : "error", ref->name);
1958 unlock_remote(ref_lock);
1959 check_locks();
1960 argv_array_clear(&commit_argv);
1961 }
1962
1963 /* Update remote server info if appropriate */
1964 if (repo->has_info_refs && new_refs) {
1965 if (info_ref_lock && repo->can_update_info_refs) {
1966 fprintf(stderr, "Updating remote server info\n");
1967 if (!dry_run)
1968 update_remote_info_refs(info_ref_lock);
1969 } else {
1970 fprintf(stderr, "Unable to update server info\n");
1971 }
1972 }
1973
1974 cleanup:
1975 if (info_ref_lock)
1976 unlock_remote(info_ref_lock);
1977 free(repo);
1978
1979 http_cleanup();
1980
1981 request = request_queue_head;
1982 while (request != NULL) {
1983 next_request = request->next;
1984 release_request(request);
1985 request = next_request;
1986 }
1987
1988 return rc;
1989 }
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