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docs: document RUN_SETUP_GENTLY and clarify RUN_SETUP
[git.git] / http-push.c
blobd4b40c9c60e8caa2b8f8e676ac18b678b6ca2ed6
1 #include "cache.h"
2 #include "commit.h"
3 #include "tag.h"
4 #include "blob.h"
5 #include "http.h"
6 #include "refs.h"
7 #include "diff.h"
8 #include "revision.h"
9 #include "exec_cmd.h"
10 #include "remote.h"
11 #include "list-objects.h"
12 #include "sigchain.h"
13
14 #ifdef EXPAT_NEEDS_XMLPARSE_H
15 #include <xmlparse.h>
16 #else
17 #include <expat.h>
18 #endif
19
20 static const char http_push_usage[] =
21 "git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
22
23 #ifndef XML_STATUS_OK
24 enum XML_Status {
25 XML_STATUS_OK = 1,
26 XML_STATUS_ERROR = 0
27 };
28 #define XML_STATUS_OK 1
29 #define XML_STATUS_ERROR 0
30 #endif
31
32 #define PREV_BUF_SIZE 4096
33
34 /* DAV methods */
35 #define DAV_LOCK "LOCK"
36 #define DAV_MKCOL "MKCOL"
37 #define DAV_MOVE "MOVE"
38 #define DAV_PROPFIND "PROPFIND"
39 #define DAV_PUT "PUT"
40 #define DAV_UNLOCK "UNLOCK"
41 #define DAV_DELETE "DELETE"
42
43 /* DAV lock flags */
44 #define DAV_PROP_LOCKWR (1u << 0)
45 #define DAV_PROP_LOCKEX (1u << 1)
46 #define DAV_LOCK_OK (1u << 2)
47
48 /* DAV XML properties */
49 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
50 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
51 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
52 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
53 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
54 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
55 #define DAV_PROPFIND_RESP ".multistatus.response"
56 #define DAV_PROPFIND_NAME ".multistatus.response.href"
57 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
58
59 /* DAV request body templates */
60 #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>"
61 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
62 #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>"
63
64 #define LOCK_TIME 600
65 #define LOCK_REFRESH 30
66
67 /* bits #0-15 in revision.h */
68
69 #define LOCAL (1u<<16)
70 #define REMOTE (1u<<17)
71 #define FETCHING (1u<<18)
72 #define PUSHING (1u<<19)
73
74 /* We allow "recursive" symbolic refs. Only within reason, though */
75 #define MAXDEPTH 5
76
77 static int pushing;
78 static int aborted;
79 static signed char remote_dir_exists[256];
80
81 static int push_verbosely;
82 static int push_all = MATCH_REFS_NONE;
83 static int force_all;
84 static int dry_run;
85 static int helper_status;
86
87 static struct object_list *objects;
88
89 struct repo {
90 char *url;
91 char *path;
92 int path_len;
93 int has_info_refs;
94 int can_update_info_refs;
95 int has_info_packs;
96 struct packed_git *packs;
97 struct remote_lock *locks;
98 };
99
100 static struct repo *repo;
101
102 enum transfer_state {
103 NEED_FETCH,
104 RUN_FETCH_LOOSE,
105 RUN_FETCH_PACKED,
106 NEED_PUSH,
107 RUN_MKCOL,
108 RUN_PUT,
109 RUN_MOVE,
110 ABORTED,
111 COMPLETE
112 };
113
114 struct transfer_request {
115 struct object *obj;
116 char *url;
117 char *dest;
118 struct remote_lock *lock;
119 struct curl_slist *headers;
120 struct buffer buffer;
121 enum transfer_state state;
122 CURLcode curl_result;
123 char errorstr[CURL_ERROR_SIZE];
124 long http_code;
125 void *userData;
126 struct active_request_slot *slot;
127 struct transfer_request *next;
128 };
129
130 static struct transfer_request *request_queue_head;
131
132 struct xml_ctx {
133 char *name;
134 int len;
135 char *cdata;
136 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
137 void *userData;
138 };
139
140 struct remote_lock {
141 char *url;
142 char *owner;
143 char *token;
144 char tmpfile_suffix[41];
145 time_t start_time;
146 long timeout;
147 int refreshing;
148 struct remote_lock *next;
149 };
150
151 /* Flags that control remote_ls processing */
152 #define PROCESS_FILES (1u << 0)
153 #define PROCESS_DIRS (1u << 1)
154 #define RECURSIVE (1u << 2)
155
156 /* Flags that remote_ls passes to callback functions */
157 #define IS_DIR (1u << 0)
158
159 struct remote_ls_ctx {
160 char *path;
161 void (*userFunc)(struct remote_ls_ctx *ls);
162 void *userData;
163 int flags;
164 char *dentry_name;
165 int dentry_flags;
166 struct remote_ls_ctx *parent;
167 };
168
169 /* get_dav_token_headers options */
170 enum dav_header_flag {
171 DAV_HEADER_IF = (1u << 0),
172 DAV_HEADER_LOCK = (1u << 1),
173 DAV_HEADER_TIMEOUT = (1u << 2)
174 };
175
176 static char *xml_entities(const char *s)
177 {
178 struct strbuf buf = STRBUF_INIT;
179 strbuf_addstr_xml_quoted(&buf, s);
180 return strbuf_detach(&buf, NULL);
181 }
182
183 static void curl_setup_http_get(CURL *curl, const char *url,
184 const char *custom_req)
185 {
186 curl_easy_setopt(curl, CURLOPT_HTTPGET, 1);
187 curl_easy_setopt(curl, CURLOPT_URL, url);
188 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
189 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_null);
190 }
191
192 static void curl_setup_http(CURL *curl, const char *url,
193 const char *custom_req, struct buffer *buffer,
194 curl_write_callback write_fn)
195 {
196 curl_easy_setopt(curl, CURLOPT_PUT, 1);
197 curl_easy_setopt(curl, CURLOPT_URL, url);
198 curl_easy_setopt(curl, CURLOPT_INFILE, buffer);
199 curl_easy_setopt(curl, CURLOPT_INFILESIZE, buffer->buf.len);
200 curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
201 #ifndef NO_CURL_IOCTL
202 curl_easy_setopt(curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
203 curl_easy_setopt(curl, CURLOPT_IOCTLDATA, &buffer);
204 #endif
205 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_fn);
206 curl_easy_setopt(curl, CURLOPT_NOBODY, 0);
207 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
208 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);
209 }
210
211 static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
212 {
213 struct strbuf buf = STRBUF_INIT;
214 struct curl_slist *dav_headers = NULL;
215
216 if (options & DAV_HEADER_IF) {
217 strbuf_addf(&buf, "If: (<%s>)", lock->token);
218 dav_headers = curl_slist_append(dav_headers, buf.buf);
219 strbuf_reset(&buf);
220 }
221 if (options & DAV_HEADER_LOCK) {
222 strbuf_addf(&buf, "Lock-Token: <%s>", lock->token);
223 dav_headers = curl_slist_append(dav_headers, buf.buf);
224 strbuf_reset(&buf);
225 }
226 if (options & DAV_HEADER_TIMEOUT) {
227 strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout);
228 dav_headers = curl_slist_append(dav_headers, buf.buf);
229 strbuf_reset(&buf);
230 }
231 strbuf_release(&buf);
232
233 return dav_headers;
234 }
235
236 static void finish_request(struct transfer_request *request);
237 static void release_request(struct transfer_request *request);
238
239 static void process_response(void *callback_data)
240 {
241 struct transfer_request *request =
242 (struct transfer_request *)callback_data;
243
244 finish_request(request);
245 }
246
247 #ifdef USE_CURL_MULTI
248
249 static void start_fetch_loose(struct transfer_request *request)
250 {
251 struct active_request_slot *slot;
252 struct http_object_request *obj_req;
253
254 obj_req = new_http_object_request(repo->url, request->obj->sha1);
255 if (obj_req == NULL) {
256 request->state = ABORTED;
257 return;
258 }
259
260 slot = obj_req->slot;
261 slot->callback_func = process_response;
262 slot->callback_data = request;
263 request->slot = slot;
264 request->userData = obj_req;
265
266 /* Try to get the request started, abort the request on error */
267 request->state = RUN_FETCH_LOOSE;
268 if (!start_active_slot(slot)) {
269 fprintf(stderr, "Unable to start GET request\n");
270 repo->can_update_info_refs = 0;
271 release_http_object_request(obj_req);
272 release_request(request);
273 }
274 }
275
276 static void start_mkcol(struct transfer_request *request)
277 {
278 char *hex = sha1_to_hex(request->obj->sha1);
279 struct active_request_slot *slot;
280
281 request->url = get_remote_object_url(repo->url, hex, 1);
282
283 slot = get_active_slot();
284 slot->callback_func = process_response;
285 slot->callback_data = request;
286 curl_setup_http_get(slot->curl, request->url, DAV_MKCOL);
287 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
288
289 if (start_active_slot(slot)) {
290 request->slot = slot;
291 request->state = RUN_MKCOL;
292 } else {
293 request->state = ABORTED;
294 free(request->url);
295 request->url = NULL;
296 }
297 }
298 #endif
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->sha1, repo->packs);
308 if (!target) {
309 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
310 repo->can_update_info_refs = 0;
311 release_request(request);
312 return;
313 }
314
315 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
316 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
317
318 preq = new_http_pack_request(target, repo->url);
319 if (preq == NULL) {
320 release_http_pack_request(preq);
321 repo->can_update_info_refs = 0;
322 return;
323 }
324 preq->lst = &repo->packs;
325
326 /* Make sure there isn't another open request for this pack */
327 while (check_request) {
328 if (check_request->state == RUN_FETCH_PACKED &&
329 !strcmp(check_request->url, preq->url)) {
330 release_http_pack_request(preq);
331 release_request(request);
332 return;
333 }
334 check_request = check_request->next;
335 }
336
337 preq->slot->callback_func = process_response;
338 preq->slot->callback_data = request;
339 request->slot = preq->slot;
340 request->userData = preq;
341
342 /* Try to get the request started, abort the request on error */
343 request->state = RUN_FETCH_PACKED;
344 if (!start_active_slot(preq->slot)) {
345 fprintf(stderr, "Unable to start GET request\n");
346 release_http_pack_request(preq);
347 repo->can_update_info_refs = 0;
348 release_request(request);
349 }
350 }
351
352 static void start_put(struct transfer_request *request)
353 {
354 char *hex = sha1_to_hex(request->obj->sha1);
355 struct active_request_slot *slot;
356 struct strbuf buf = STRBUF_INIT;
357 enum object_type type;
358 char hdr[50];
359 void *unpacked;
360 unsigned long len;
361 int hdrlen;
362 ssize_t size;
363 git_zstream stream;
364
365 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
366 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
367
368 /* Set it up */
369 memset(&stream, 0, sizeof(stream));
370 git_deflate_init(&stream, zlib_compression_level);
371 size = git_deflate_bound(&stream, len + hdrlen);
372 strbuf_init(&request->buffer.buf, size);
373 request->buffer.posn = 0;
374
375 /* Compress it */
376 stream.next_out = (unsigned char *)request->buffer.buf.buf;
377 stream.avail_out = size;
378
379 /* First header.. */
380 stream.next_in = (void *)hdr;
381 stream.avail_in = hdrlen;
382 while (git_deflate(&stream, 0) == Z_OK)
383 ; /* nothing */
384
385 /* Then the data itself.. */
386 stream.next_in = unpacked;
387 stream.avail_in = len;
388 while (git_deflate(&stream, Z_FINISH) == Z_OK)
389 ; /* nothing */
390 git_deflate_end(&stream);
391 free(unpacked);
392
393 request->buffer.buf.len = stream.total_out;
394
395 strbuf_addstr(&buf, "Destination: ");
396 append_remote_object_url(&buf, repo->url, hex, 0);
397 request->dest = strbuf_detach(&buf, NULL);
398
399 append_remote_object_url(&buf, repo->url, hex, 0);
400 strbuf_add(&buf, request->lock->tmpfile_suffix, 41);
401 request->url = strbuf_detach(&buf, NULL);
402
403 slot = get_active_slot();
404 slot->callback_func = process_response;
405 slot->callback_data = request;
406 curl_setup_http(slot->curl, request->url, DAV_PUT,
407 &request->buffer, fwrite_null);
408
409 if (start_active_slot(slot)) {
410 request->slot = slot;
411 request->state = RUN_PUT;
412 } else {
413 request->state = ABORTED;
414 free(request->url);
415 request->url = NULL;
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 = NULL;
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(request->url);
438 request->url = NULL;
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 */
530 if (request->state != RUN_PUT) {
531 free(request->url);
532 request->url = NULL;
533 }
534
535 if (request->state == RUN_MKCOL) {
536 if (request->curl_result == CURLE_OK ||
537 request->http_code == 405) {
538 remote_dir_exists[request->obj->sha1[0]] = 1;
539 start_put(request);
540 } else {
541 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
542 sha1_to_hex(request->obj->sha1),
543 request->curl_result, request->http_code);
544 request->state = ABORTED;
545 aborted = 1;
546 }
547 } else if (request->state == RUN_PUT) {
548 if (request->curl_result == CURLE_OK) {
549 start_move(request);
550 } else {
551 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
552 sha1_to_hex(request->obj->sha1),
553 request->curl_result, request->http_code);
554 request->state = ABORTED;
555 aborted = 1;
556 }
557 } else if (request->state == RUN_MOVE) {
558 if (request->curl_result == CURLE_OK) {
559 if (push_verbosely)
560 fprintf(stderr, " sent %s\n",
561 sha1_to_hex(request->obj->sha1));
562 request->obj->flags |= REMOTE;
563 release_request(request);
564 } else {
565 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
566 sha1_to_hex(request->obj->sha1),
567 request->curl_result, request->http_code);
568 request->state = ABORTED;
569 aborted = 1;
570 }
571 } else if (request->state == RUN_FETCH_LOOSE) {
572 obj_req = (struct http_object_request *)request->userData;
573
574 if (finish_http_object_request(obj_req) == 0)
575 if (obj_req->rename == 0)
576 request->obj->flags |= (LOCAL | REMOTE);
577
578 /* Try fetching packed if necessary */
579 if (request->obj->flags & LOCAL) {
580 release_http_object_request(obj_req);
581 release_request(request);
582 } else
583 start_fetch_packed(request);
584
585 } else if (request->state == RUN_FETCH_PACKED) {
586 int fail = 1;
587 if (request->curl_result != CURLE_OK) {
588 fprintf(stderr, "Unable to get pack file %s\n%s",
589 request->url, curl_errorstr);
590 } else {
591 preq = (struct http_pack_request *)request->userData;
592
593 if (preq) {
594 if (finish_http_pack_request(preq) == 0)
595 fail = 0;
596 release_http_pack_request(preq);
597 }
598 }
599 if (fail)
600 repo->can_update_info_refs = 0;
601 release_request(request);
602 }
603 }
604
605 #ifdef USE_CURL_MULTI
606 static int is_running_queue;
607 static int fill_active_slot(void *unused)
608 {
609 struct transfer_request *request;
610
611 if (aborted || !is_running_queue)
612 return 0;
613
614 for (request = request_queue_head; request; request = request->next) {
615 if (request->state == NEED_FETCH) {
616 start_fetch_loose(request);
617 return 1;
618 } else if (pushing && request->state == NEED_PUSH) {
619 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
620 start_put(request);
621 } else {
622 start_mkcol(request);
623 }
624 return 1;
625 }
626 }
627 return 0;
628 }
629 #endif
630
631 static void get_remote_object_list(unsigned char parent);
632
633 static void add_fetch_request(struct object *obj)
634 {
635 struct transfer_request *request;
636
637 check_locks();
638
639 /*
640 * Don't fetch the object if it's known to exist locally
641 * or is already in the request queue
642 */
643 if (remote_dir_exists[obj->sha1[0]] == -1)
644 get_remote_object_list(obj->sha1[0]);
645 if (obj->flags & (LOCAL | FETCHING))
646 return;
647
648 obj->flags |= FETCHING;
649 request = xmalloc(sizeof(*request));
650 request->obj = obj;
651 request->url = NULL;
652 request->lock = NULL;
653 request->headers = NULL;
654 request->state = NEED_FETCH;
655 request->next = request_queue_head;
656 request_queue_head = request;
657
658 #ifdef USE_CURL_MULTI
659 fill_active_slots();
660 step_active_slots();
661 #endif
662 }
663
664 static int add_send_request(struct object *obj, struct remote_lock *lock)
665 {
666 struct transfer_request *request;
667 struct packed_git *target;
668
669 /* Keep locks active */
670 check_locks();
671
672 /*
673 * Don't push the object if it's known to exist on the remote
674 * or is already in the request queue
675 */
676 if (remote_dir_exists[obj->sha1[0]] == -1)
677 get_remote_object_list(obj->sha1[0]);
678 if (obj->flags & (REMOTE | PUSHING))
679 return 0;
680 target = find_sha1_pack(obj->sha1, repo->packs);
681 if (target) {
682 obj->flags |= REMOTE;
683 return 0;
684 }
685
686 obj->flags |= PUSHING;
687 request = xmalloc(sizeof(*request));
688 request->obj = obj;
689 request->url = NULL;
690 request->lock = lock;
691 request->headers = NULL;
692 request->state = NEED_PUSH;
693 request->next = request_queue_head;
694 request_queue_head = request;
695
696 #ifdef USE_CURL_MULTI
697 fill_active_slots();
698 step_active_slots();
699 #endif
700
701 return 1;
702 }
703
704 static int fetch_indices(void)
705 {
706 int ret;
707
708 if (push_verbosely)
709 fprintf(stderr, "Getting pack list\n");
710
711 switch (http_get_info_packs(repo->url, &repo->packs)) {
712 case HTTP_OK:
713 case HTTP_MISSING_TARGET:
714 ret = 0;
715 break;
716 default:
717 ret = -1;
718 }
719
720 return ret;
721 }
722
723 static void one_remote_object(const char *hex)
724 {
725 unsigned char sha1[20];
726 struct object *obj;
727
728 if (get_sha1_hex(hex, sha1) != 0)
729 return;
730
731 obj = lookup_object(sha1);
732 if (!obj)
733 obj = parse_object(sha1);
734
735 /* Ignore remote objects that don't exist locally */
736 if (!obj)
737 return;
738
739 obj->flags |= REMOTE;
740 if (!object_list_contains(objects, obj))
741 object_list_insert(obj, &objects);
742 }
743
744 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
745 {
746 int *lock_flags = (int *)ctx->userData;
747
748 if (tag_closed) {
749 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
750 if ((*lock_flags & DAV_PROP_LOCKEX) &&
751 (*lock_flags & DAV_PROP_LOCKWR)) {
752 *lock_flags |= DAV_LOCK_OK;
753 }
754 *lock_flags &= DAV_LOCK_OK;
755 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
756 *lock_flags |= DAV_PROP_LOCKWR;
757 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
758 *lock_flags |= DAV_PROP_LOCKEX;
759 }
760 }
761 }
762
763 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
764 {
765 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
766 git_SHA_CTX sha_ctx;
767 unsigned char lock_token_sha1[20];
768
769 if (tag_closed && ctx->cdata) {
770 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
771 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
772 strcpy(lock->owner, ctx->cdata);
773 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
774 if (starts_with(ctx->cdata, "Second-"))
775 lock->timeout =
776 strtol(ctx->cdata + 7, NULL, 10);
777 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
778 lock->token = xmalloc(strlen(ctx->cdata) + 1);
779 strcpy(lock->token, ctx->cdata);
780
781 git_SHA1_Init(&sha_ctx);
782 git_SHA1_Update(&sha_ctx, lock->token, strlen(lock->token));
783 git_SHA1_Final(lock_token_sha1, &sha_ctx);
784
785 lock->tmpfile_suffix[0] = '_';
786 memcpy(lock->tmpfile_suffix + 1, sha1_to_hex(lock_token_sha1), 40);
787 }
788 }
789 }
790
791 static void one_remote_ref(const char *refname);
792
793 static void
794 xml_start_tag(void *userData, const char *name, const char **atts)
795 {
796 struct xml_ctx *ctx = (struct xml_ctx *)userData;
797 const char *c = strchr(name, ':');
798 int new_len;
799
800 if (c == NULL)
801 c = name;
802 else
803 c++;
804
805 new_len = strlen(ctx->name) + strlen(c) + 2;
806
807 if (new_len > ctx->len) {
808 ctx->name = xrealloc(ctx->name, new_len);
809 ctx->len = new_len;
810 }
811 strcat(ctx->name, ".");
812 strcat(ctx->name, c);
813
814 free(ctx->cdata);
815 ctx->cdata = NULL;
816
817 ctx->userFunc(ctx, 0);
818 }
819
820 static void
821 xml_end_tag(void *userData, const char *name)
822 {
823 struct xml_ctx *ctx = (struct xml_ctx *)userData;
824 const char *c = strchr(name, ':');
825 char *ep;
826
827 ctx->userFunc(ctx, 1);
828
829 if (c == NULL)
830 c = name;
831 else
832 c++;
833
834 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
835 *ep = 0;
836 }
837
838 static void
839 xml_cdata(void *userData, const XML_Char *s, int len)
840 {
841 struct xml_ctx *ctx = (struct xml_ctx *)userData;
842 free(ctx->cdata);
843 ctx->cdata = xmemdupz(s, len);
844 }
845
846 static struct remote_lock *lock_remote(const char *path, long timeout)
847 {
848 struct active_request_slot *slot;
849 struct slot_results results;
850 struct buffer out_buffer = { STRBUF_INIT, 0 };
851 struct strbuf in_buffer = STRBUF_INIT;
852 char *url;
853 char *ep;
854 char timeout_header[25];
855 struct remote_lock *lock = NULL;
856 struct curl_slist *dav_headers = NULL;
857 struct xml_ctx ctx;
858 char *escaped;
859
860 url = xmalloc(strlen(repo->url) + strlen(path) + 1);
861 sprintf(url, "%s%s", repo->url, path);
862
863 /* Make sure leading directories exist for the remote ref */
864 ep = strchr(url + strlen(repo->url) + 1, '/');
865 while (ep) {
866 char saved_character = ep[1];
867 ep[1] = '\0';
868 slot = get_active_slot();
869 slot->results = &results;
870 curl_setup_http_get(slot->curl, url, DAV_MKCOL);
871 if (start_active_slot(slot)) {
872 run_active_slot(slot);
873 if (results.curl_result != CURLE_OK &&
874 results.http_code != 405) {
875 fprintf(stderr,
876 "Unable to create branch path %s\n",
877 url);
878 free(url);
879 return NULL;
880 }
881 } else {
882 fprintf(stderr, "Unable to start MKCOL request\n");
883 free(url);
884 return NULL;
885 }
886 ep[1] = saved_character;
887 ep = strchr(ep + 1, '/');
888 }
889
890 escaped = xml_entities(ident_default_email());
891 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
892 free(escaped);
893
894 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
895 dav_headers = curl_slist_append(dav_headers, timeout_header);
896 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
897
898 slot = get_active_slot();
899 slot->results = &results;
900 curl_setup_http(slot->curl, url, DAV_LOCK, &out_buffer, fwrite_buffer);
901 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
902 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
903
904 lock = xcalloc(1, sizeof(*lock));
905 lock->timeout = -1;
906
907 if (start_active_slot(slot)) {
908 run_active_slot(slot);
909 if (results.curl_result == CURLE_OK) {
910 XML_Parser parser = XML_ParserCreate(NULL);
911 enum XML_Status result;
912 ctx.name = xcalloc(10, 1);
913 ctx.len = 0;
914 ctx.cdata = NULL;
915 ctx.userFunc = handle_new_lock_ctx;
916 ctx.userData = lock;
917 XML_SetUserData(parser, &ctx);
918 XML_SetElementHandler(parser, xml_start_tag,
919 xml_end_tag);
920 XML_SetCharacterDataHandler(parser, xml_cdata);
921 result = XML_Parse(parser, in_buffer.buf,
922 in_buffer.len, 1);
923 free(ctx.name);
924 if (result != XML_STATUS_OK) {
925 fprintf(stderr, "XML error: %s\n",
926 XML_ErrorString(
927 XML_GetErrorCode(parser)));
928 lock->timeout = -1;
929 }
930 XML_ParserFree(parser);
931 }
932 } else {
933 fprintf(stderr, "Unable to start LOCK request\n");
934 }
935
936 curl_slist_free_all(dav_headers);
937 strbuf_release(&out_buffer.buf);
938 strbuf_release(&in_buffer);
939
940 if (lock->token == NULL || lock->timeout <= 0) {
941 free(lock->token);
942 free(lock->owner);
943 free(url);
944 free(lock);
945 lock = NULL;
946 } else {
947 lock->url = url;
948 lock->start_time = time(NULL);
949 lock->next = repo->locks;
950 repo->locks = lock;
951 }
952
953 return lock;
954 }
955
956 static int unlock_remote(struct remote_lock *lock)
957 {
958 struct active_request_slot *slot;
959 struct slot_results results;
960 struct remote_lock *prev = repo->locks;
961 struct curl_slist *dav_headers;
962 int rc = 0;
963
964 dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
965
966 slot = get_active_slot();
967 slot->results = &results;
968 curl_setup_http_get(slot->curl, lock->url, DAV_UNLOCK);
969 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
970
971 if (start_active_slot(slot)) {
972 run_active_slot(slot);
973 if (results.curl_result == CURLE_OK)
974 rc = 1;
975 else
976 fprintf(stderr, "UNLOCK HTTP error %ld\n",
977 results.http_code);
978 } else {
979 fprintf(stderr, "Unable to start UNLOCK request\n");
980 }
981
982 curl_slist_free_all(dav_headers);
983
984 if (repo->locks == lock) {
985 repo->locks = lock->next;
986 } else {
987 while (prev && prev->next != lock)
988 prev = prev->next;
989 if (prev)
990 prev->next = prev->next->next;
991 }
992
993 free(lock->owner);
994 free(lock->url);
995 free(lock->token);
996 free(lock);
997
998 return rc;
999 }
1000
1001 static void remove_locks(void)
1002 {
1003 struct remote_lock *lock = repo->locks;
1004
1005 fprintf(stderr, "Removing remote locks...\n");
1006 while (lock) {
1007 struct remote_lock *next = lock->next;
1008 unlock_remote(lock);
1009 lock = next;
1010 }
1011 }
1012
1013 static void remove_locks_on_signal(int signo)
1014 {
1015 remove_locks();
1016 sigchain_pop(signo);
1017 raise(signo);
1018 }
1019
1020 static void remote_ls(const char *path, int flags,
1021 void (*userFunc)(struct remote_ls_ctx *ls),
1022 void *userData);
1023
1024 static void process_ls_object(struct remote_ls_ctx *ls)
1025 {
1026 unsigned int *parent = (unsigned int *)ls->userData;
1027 char *path = ls->dentry_name;
1028 char *obj_hex;
1029
1030 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1031 remote_dir_exists[*parent] = 1;
1032 return;
1033 }
1034
1035 if (strlen(path) != 49)
1036 return;
1037 path += 8;
1038 obj_hex = xmalloc(strlen(path));
1039 /* NB: path is not null-terminated, can not use strlcpy here */
1040 memcpy(obj_hex, path, 2);
1041 strcpy(obj_hex + 2, path + 3);
1042 one_remote_object(obj_hex);
1043 free(obj_hex);
1044 }
1045
1046 static void process_ls_ref(struct remote_ls_ctx *ls)
1047 {
1048 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1049 fprintf(stderr, " %s\n", ls->dentry_name);
1050 return;
1051 }
1052
1053 if (!(ls->dentry_flags & IS_DIR))
1054 one_remote_ref(ls->dentry_name);
1055 }
1056
1057 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1058 {
1059 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1060
1061 if (tag_closed) {
1062 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1063 if (ls->dentry_flags & IS_DIR) {
1064
1065 /* ensure collection names end with slash */
1066 str_end_url_with_slash(ls->dentry_name, &ls->dentry_name);
1067
1068 if (ls->flags & PROCESS_DIRS) {
1069 ls->userFunc(ls);
1070 }
1071 if (strcmp(ls->dentry_name, ls->path) &&
1072 ls->flags & RECURSIVE) {
1073 remote_ls(ls->dentry_name,
1074 ls->flags,
1075 ls->userFunc,
1076 ls->userData);
1077 }
1078 } else if (ls->flags & PROCESS_FILES) {
1079 ls->userFunc(ls);
1080 }
1081 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1082 char *path = ctx->cdata;
1083 if (*ctx->cdata == 'h') {
1084 path = strstr(path, "//");
1085 if (path) {
1086 path = strchr(path+2, '/');
1087 }
1088 }
1089 if (path) {
1090 const char *url = repo->url;
1091 if (repo->path)
1092 url = repo->path;
1093 if (strncmp(path, url, repo->path_len))
1094 error("Parsed path '%s' does not match url: '%s'",
1095 path, url);
1096 else {
1097 path += repo->path_len;
1098 ls->dentry_name = xstrdup(path);
1099 }
1100 }
1101 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1102 ls->dentry_flags |= IS_DIR;
1103 }
1104 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1105 free(ls->dentry_name);
1106 ls->dentry_name = NULL;
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 = xmalloc(strlen(repo->url) + strlen(path) + 1);
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 = NULL;
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 sprintf(url, "%s%s", repo->url, path);
1138
1139 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1140
1141 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1142 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1143
1144 slot = get_active_slot();
1145 slot->results = &results;
1146 curl_setup_http(slot->curl, url, DAV_PROPFIND,
1147 &out_buffer, fwrite_buffer);
1148 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1149 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1150
1151 if (start_active_slot(slot)) {
1152 run_active_slot(slot);
1153 if (results.curl_result == CURLE_OK) {
1154 XML_Parser parser = XML_ParserCreate(NULL);
1155 enum XML_Status result;
1156 ctx.name = xcalloc(10, 1);
1157 ctx.len = 0;
1158 ctx.cdata = NULL;
1159 ctx.userFunc = handle_remote_ls_ctx;
1160 ctx.userData = &ls;
1161 XML_SetUserData(parser, &ctx);
1162 XML_SetElementHandler(parser, xml_start_tag,
1163 xml_end_tag);
1164 XML_SetCharacterDataHandler(parser, xml_cdata);
1165 result = XML_Parse(parser, in_buffer.buf,
1166 in_buffer.len, 1);
1167 free(ctx.name);
1168
1169 if (result != XML_STATUS_OK) {
1170 fprintf(stderr, "XML error: %s\n",
1171 XML_ErrorString(
1172 XML_GetErrorCode(parser)));
1173 }
1174 XML_ParserFree(parser);
1175 }
1176 } else {
1177 fprintf(stderr, "Unable to start PROPFIND request\n");
1178 }
1179
1180 free(ls.path);
1181 free(url);
1182 strbuf_release(&out_buffer.buf);
1183 strbuf_release(&in_buffer);
1184 curl_slist_free_all(dav_headers);
1185 }
1186
1187 static void get_remote_object_list(unsigned char parent)
1188 {
1189 char path[] = "objects/XX/";
1190 static const char hex[] = "0123456789abcdef";
1191 unsigned int val = parent;
1192
1193 path[8] = hex[val >> 4];
1194 path[9] = hex[val & 0xf];
1195 remote_dir_exists[val] = 0;
1196 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1197 process_ls_object, &val);
1198 }
1199
1200 static int locking_available(void)
1201 {
1202 struct active_request_slot *slot;
1203 struct slot_results results;
1204 struct strbuf in_buffer = STRBUF_INIT;
1205 struct buffer out_buffer = { STRBUF_INIT, 0 };
1206 struct curl_slist *dav_headers = NULL;
1207 struct xml_ctx ctx;
1208 int lock_flags = 0;
1209 char *escaped;
1210
1211 escaped = xml_entities(repo->url);
1212 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
1213 free(escaped);
1214
1215 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1216 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1217
1218 slot = get_active_slot();
1219 slot->results = &results;
1220 curl_setup_http(slot->curl, repo->url, DAV_PROPFIND,
1221 &out_buffer, fwrite_buffer);
1222 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1223 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1224
1225 if (start_active_slot(slot)) {
1226 run_active_slot(slot);
1227 if (results.curl_result == CURLE_OK) {
1228 XML_Parser parser = XML_ParserCreate(NULL);
1229 enum XML_Status result;
1230 ctx.name = xcalloc(10, 1);
1231 ctx.len = 0;
1232 ctx.cdata = NULL;
1233 ctx.userFunc = handle_lockprop_ctx;
1234 ctx.userData = &lock_flags;
1235 XML_SetUserData(parser, &ctx);
1236 XML_SetElementHandler(parser, xml_start_tag,
1237 xml_end_tag);
1238 result = XML_Parse(parser, in_buffer.buf,
1239 in_buffer.len, 1);
1240 free(ctx.name);
1241
1242 if (result != XML_STATUS_OK) {
1243 fprintf(stderr, "XML error: %s\n",
1244 XML_ErrorString(
1245 XML_GetErrorCode(parser)));
1246 lock_flags = 0;
1247 }
1248 XML_ParserFree(parser);
1249 if (!lock_flags)
1250 error("no DAV locking support on %s",
1251 repo->url);
1252
1253 } else {
1254 error("Cannot access URL %s, return code %d",
1255 repo->url, results.curl_result);
1256 lock_flags = 0;
1257 }
1258 } else {
1259 error("Unable to start PROPFIND request on %s", repo->url);
1260 }
1261
1262 strbuf_release(&out_buffer.buf);
1263 strbuf_release(&in_buffer);
1264 curl_slist_free_all(dav_headers);
1265
1266 return lock_flags;
1267 }
1268
1269 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1270 {
1271 struct object_list *entry = xmalloc(sizeof(struct object_list));
1272 entry->item = obj;
1273 entry->next = *p;
1274 *p = entry;
1275 return &entry->next;
1276 }
1277
1278 static struct object_list **process_blob(struct blob *blob,
1279 struct object_list **p,
1280 struct name_path *path,
1281 const char *name)
1282 {
1283 struct object *obj = &blob->object;
1284
1285 obj->flags |= LOCAL;
1286
1287 if (obj->flags & (UNINTERESTING | SEEN))
1288 return p;
1289
1290 obj->flags |= SEEN;
1291 return add_one_object(obj, p);
1292 }
1293
1294 static struct object_list **process_tree(struct tree *tree,
1295 struct object_list **p,
1296 struct name_path *path,
1297 const char *name)
1298 {
1299 struct object *obj = &tree->object;
1300 struct tree_desc desc;
1301 struct name_entry entry;
1302 struct name_path me;
1303
1304 obj->flags |= LOCAL;
1305
1306 if (obj->flags & (UNINTERESTING | SEEN))
1307 return p;
1308 if (parse_tree(tree) < 0)
1309 die("bad tree object %s", sha1_to_hex(obj->sha1));
1310
1311 obj->flags |= SEEN;
1312 name = xstrdup(name);
1313 p = add_one_object(obj, p);
1314 me.up = path;
1315 me.elem = name;
1316 me.elem_len = strlen(name);
1317
1318 init_tree_desc(&desc, tree->buffer, tree->size);
1319
1320 while (tree_entry(&desc, &entry))
1321 switch (object_type(entry.mode)) {
1322 case OBJ_TREE:
1323 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1324 break;
1325 case OBJ_BLOB:
1326 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1327 break;
1328 default:
1329 /* Subproject commit - not in this repository */
1330 break;
1331 }
1332
1333 free_tree_buffer(tree);
1334 return p;
1335 }
1336
1337 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1338 {
1339 int i;
1340 struct commit *commit;
1341 struct object_list **p = &objects;
1342 int count = 0;
1343
1344 while ((commit = get_revision(revs)) != NULL) {
1345 p = process_tree(commit->tree, p, NULL, "");
1346 commit->object.flags |= LOCAL;
1347 if (!(commit->object.flags & UNINTERESTING))
1348 count += add_send_request(&commit->object, lock);
1349 }
1350
1351 for (i = 0; i < revs->pending.nr; i++) {
1352 struct object_array_entry *entry = revs->pending.objects + i;
1353 struct object *obj = entry->item;
1354 const char *name = entry->name;
1355
1356 if (obj->flags & (UNINTERESTING | SEEN))
1357 continue;
1358 if (obj->type == OBJ_TAG) {
1359 obj->flags |= SEEN;
1360 p = add_one_object(obj, p);
1361 continue;
1362 }
1363 if (obj->type == OBJ_TREE) {
1364 p = process_tree((struct tree *)obj, p, NULL, name);
1365 continue;
1366 }
1367 if (obj->type == OBJ_BLOB) {
1368 p = process_blob((struct blob *)obj, p, NULL, name);
1369 continue;
1370 }
1371 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1372 }
1373
1374 while (objects) {
1375 if (!(objects->item->flags & UNINTERESTING))
1376 count += add_send_request(objects->item, lock);
1377 objects = objects->next;
1378 }
1379
1380 return count;
1381 }
1382
1383 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1384 {
1385 struct active_request_slot *slot;
1386 struct slot_results results;
1387 struct buffer out_buffer = { STRBUF_INIT, 0 };
1388 struct curl_slist *dav_headers;
1389
1390 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1391
1392 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1393
1394 slot = get_active_slot();
1395 slot->results = &results;
1396 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1397 &out_buffer, fwrite_null);
1398 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1399
1400 if (start_active_slot(slot)) {
1401 run_active_slot(slot);
1402 strbuf_release(&out_buffer.buf);
1403 if (results.curl_result != CURLE_OK) {
1404 fprintf(stderr,
1405 "PUT error: curl result=%d, HTTP code=%ld\n",
1406 results.curl_result, results.http_code);
1407 /* We should attempt recovery? */
1408 return 0;
1409 }
1410 } else {
1411 strbuf_release(&out_buffer.buf);
1412 fprintf(stderr, "Unable to start PUT request\n");
1413 return 0;
1414 }
1415
1416 return 1;
1417 }
1418
1419 static struct ref *remote_refs;
1420
1421 static void one_remote_ref(const char *refname)
1422 {
1423 struct ref *ref;
1424 struct object *obj;
1425
1426 ref = alloc_ref(refname);
1427
1428 if (http_fetch_ref(repo->url, ref) != 0) {
1429 fprintf(stderr,
1430 "Unable to fetch ref %s from %s\n",
1431 refname, repo->url);
1432 free(ref);
1433 return;
1434 }
1435
1436 /*
1437 * Fetch a copy of the object if it doesn't exist locally - it
1438 * may be required for updating server info later.
1439 */
1440 if (repo->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
1441 obj = lookup_unknown_object(ref->old_sha1);
1442 if (obj) {
1443 fprintf(stderr, " fetch %s for %s\n",
1444 sha1_to_hex(ref->old_sha1), refname);
1445 add_fetch_request(obj);
1446 }
1447 }
1448
1449 ref->next = remote_refs;
1450 remote_refs = ref;
1451 }
1452
1453 static void get_dav_remote_heads(void)
1454 {
1455 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1456 }
1457
1458 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1459 {
1460 struct strbuf *buf = (struct strbuf *)ls->userData;
1461 struct object *o;
1462 int len;
1463 char *ref_info;
1464 struct ref *ref;
1465
1466 ref = alloc_ref(ls->dentry_name);
1467
1468 if (http_fetch_ref(repo->url, ref) != 0) {
1469 fprintf(stderr,
1470 "Unable to fetch ref %s from %s\n",
1471 ls->dentry_name, repo->url);
1472 aborted = 1;
1473 free(ref);
1474 return;
1475 }
1476
1477 o = parse_object(ref->old_sha1);
1478 if (!o) {
1479 fprintf(stderr,
1480 "Unable to parse object %s for remote ref %s\n",
1481 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1482 aborted = 1;
1483 free(ref);
1484 return;
1485 }
1486
1487 len = strlen(ls->dentry_name) + 42;
1488 ref_info = xcalloc(len + 1, 1);
1489 sprintf(ref_info, "%s %s\n",
1490 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1491 fwrite_buffer(ref_info, 1, len, buf);
1492 free(ref_info);
1493
1494 if (o->type == OBJ_TAG) {
1495 o = deref_tag(o, ls->dentry_name, 0);
1496 if (o) {
1497 len = strlen(ls->dentry_name) + 45;
1498 ref_info = xcalloc(len + 1, 1);
1499 sprintf(ref_info, "%s %s^{}\n",
1500 sha1_to_hex(o->sha1), ls->dentry_name);
1501 fwrite_buffer(ref_info, 1, len, buf);
1502 free(ref_info);
1503 }
1504 }
1505 free(ref);
1506 }
1507
1508 static void update_remote_info_refs(struct remote_lock *lock)
1509 {
1510 struct buffer buffer = { STRBUF_INIT, 0 };
1511 struct active_request_slot *slot;
1512 struct slot_results results;
1513 struct curl_slist *dav_headers;
1514
1515 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1516 add_remote_info_ref, &buffer.buf);
1517 if (!aborted) {
1518 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1519
1520 slot = get_active_slot();
1521 slot->results = &results;
1522 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1523 &buffer, fwrite_null);
1524 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1525
1526 if (start_active_slot(slot)) {
1527 run_active_slot(slot);
1528 if (results.curl_result != CURLE_OK) {
1529 fprintf(stderr,
1530 "PUT error: curl result=%d, HTTP code=%ld\n",
1531 results.curl_result, results.http_code);
1532 }
1533 }
1534 }
1535 strbuf_release(&buffer.buf);
1536 }
1537
1538 static int remote_exists(const char *path)
1539 {
1540 char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1541 int ret;
1542
1543 sprintf(url, "%s%s", repo->url, path);
1544
1545 switch (http_get_strbuf(url, NULL, NULL)) {
1546 case HTTP_OK:
1547 ret = 1;
1548 break;
1549 case HTTP_MISSING_TARGET:
1550 ret = 0;
1551 break;
1552 case HTTP_ERROR:
1553 error("unable to access '%s': %s", url, curl_errorstr);
1554 default:
1555 ret = -1;
1556 }
1557 free(url);
1558 return ret;
1559 }
1560
1561 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
1562 {
1563 char *url;
1564 struct strbuf buffer = STRBUF_INIT;
1565
1566 url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1567 sprintf(url, "%s%s", repo->url, path);
1568
1569 if (http_get_strbuf(url, &buffer, NULL) != HTTP_OK)
1570 die("Couldn't get %s for remote symref\n%s", url,
1571 curl_errorstr);
1572 free(url);
1573
1574 free(*symref);
1575 *symref = NULL;
1576 hashclr(sha1);
1577
1578 if (buffer.len == 0)
1579 return;
1580
1581 /* If it's a symref, set the refname; otherwise try for a sha1 */
1582 if (starts_with((char *)buffer.buf, "ref: ")) {
1583 *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
1584 } else {
1585 get_sha1_hex(buffer.buf, sha1);
1586 }
1587
1588 strbuf_release(&buffer);
1589 }
1590
1591 static int verify_merge_base(unsigned char *head_sha1, struct ref *remote)
1592 {
1593 struct commit *head = lookup_commit_or_die(head_sha1, "HEAD");
1594 struct commit *branch = lookup_commit_or_die(remote->old_sha1, remote->name);
1595
1596 return in_merge_bases(branch, head);
1597 }
1598
1599 static int delete_remote_branch(const char *pattern, int force)
1600 {
1601 struct ref *refs = remote_refs;
1602 struct ref *remote_ref = NULL;
1603 unsigned char head_sha1[20];
1604 char *symref = NULL;
1605 int match;
1606 int patlen = strlen(pattern);
1607 int i;
1608 struct active_request_slot *slot;
1609 struct slot_results results;
1610 char *url;
1611
1612 /* Find the remote branch(es) matching the specified branch name */
1613 for (match = 0; refs; refs = refs->next) {
1614 char *name = refs->name;
1615 int namelen = strlen(name);
1616 if (namelen < patlen ||
1617 memcmp(name + namelen - patlen, pattern, patlen))
1618 continue;
1619 if (namelen != patlen && name[namelen - patlen - 1] != '/')
1620 continue;
1621 match++;
1622 remote_ref = refs;
1623 }
1624 if (match == 0)
1625 return error("No remote branch matches %s", pattern);
1626 if (match != 1)
1627 return error("More than one remote branch matches %s",
1628 pattern);
1629
1630 /*
1631 * Remote HEAD must be a symref (not exactly foolproof; a remote
1632 * symlink to a symref will look like a symref)
1633 */
1634 fetch_symref("HEAD", &symref, head_sha1);
1635 if (!symref)
1636 return error("Remote HEAD is not a symref");
1637
1638 /* Remote branch must not be the remote HEAD */
1639 for (i = 0; symref && i < MAXDEPTH; i++) {
1640 if (!strcmp(remote_ref->name, symref))
1641 return error("Remote branch %s is the current HEAD",
1642 remote_ref->name);
1643 fetch_symref(symref, &symref, head_sha1);
1644 }
1645
1646 /* Run extra sanity checks if delete is not forced */
1647 if (!force) {
1648 /* Remote HEAD must resolve to a known object */
1649 if (symref)
1650 return error("Remote HEAD symrefs too deep");
1651 if (is_null_sha1(head_sha1))
1652 return error("Unable to resolve remote HEAD");
1653 if (!has_sha1_file(head_sha1))
1654 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
1655
1656 /* Remote branch must resolve to a known object */
1657 if (is_null_sha1(remote_ref->old_sha1))
1658 return error("Unable to resolve remote branch %s",
1659 remote_ref->name);
1660 if (!has_sha1_file(remote_ref->old_sha1))
1661 return error("Remote branch %s resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", remote_ref->name, sha1_to_hex(remote_ref->old_sha1));
1662
1663 /* Remote branch must be an ancestor of remote HEAD */
1664 if (!verify_merge_base(head_sha1, remote_ref)) {
1665 return error("The branch '%s' is not an ancestor "
1666 "of your current HEAD.\n"
1667 "If you are sure you want to delete it,"
1668 " run:\n\t'git http-push -D %s %s'",
1669 remote_ref->name, repo->url, pattern);
1670 }
1671 }
1672
1673 /* Send delete request */
1674 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
1675 if (dry_run)
1676 return 0;
1677 url = xmalloc(strlen(repo->url) + strlen(remote_ref->name) + 1);
1678 sprintf(url, "%s%s", repo->url, remote_ref->name);
1679 slot = get_active_slot();
1680 slot->results = &results;
1681 curl_setup_http_get(slot->curl, url, DAV_DELETE);
1682 if (start_active_slot(slot)) {
1683 run_active_slot(slot);
1684 free(url);
1685 if (results.curl_result != CURLE_OK)
1686 return error("DELETE request failed (%d/%ld)",
1687 results.curl_result, results.http_code);
1688 } else {
1689 free(url);
1690 return error("Unable to start DELETE request");
1691 }
1692
1693 return 0;
1694 }
1695
1696 static void run_request_queue(void)
1697 {
1698 #ifdef USE_CURL_MULTI
1699 is_running_queue = 1;
1700 fill_active_slots();
1701 add_fill_function(NULL, fill_active_slot);
1702 #endif
1703 do {
1704 finish_all_active_slots();
1705 #ifdef USE_CURL_MULTI
1706 fill_active_slots();
1707 #endif
1708 } while (request_queue_head && !aborted);
1709
1710 #ifdef USE_CURL_MULTI
1711 is_running_queue = 0;
1712 #endif
1713 }
1714
1715 int main(int argc, char **argv)
1716 {
1717 struct transfer_request *request;
1718 struct transfer_request *next_request;
1719 int nr_refspec = 0;
1720 char **refspec = NULL;
1721 struct remote_lock *ref_lock = NULL;
1722 struct remote_lock *info_ref_lock = NULL;
1723 struct rev_info revs;
1724 int delete_branch = 0;
1725 int force_delete = 0;
1726 int objects_to_send;
1727 int rc = 0;
1728 int i;
1729 int new_refs;
1730 struct ref *ref, *local_refs;
1731
1732 git_setup_gettext();
1733
1734 git_extract_argv0_path(argv[0]);
1735
1736 repo = xcalloc(sizeof(*repo), 1);
1737
1738 argv++;
1739 for (i = 1; i < argc; i++, argv++) {
1740 char *arg = *argv;
1741
1742 if (*arg == '-') {
1743 if (!strcmp(arg, "--all")) {
1744 push_all = MATCH_REFS_ALL;
1745 continue;
1746 }
1747 if (!strcmp(arg, "--force")) {
1748 force_all = 1;
1749 continue;
1750 }
1751 if (!strcmp(arg, "--dry-run")) {
1752 dry_run = 1;
1753 continue;
1754 }
1755 if (!strcmp(arg, "--helper-status")) {
1756 helper_status = 1;
1757 continue;
1758 }
1759 if (!strcmp(arg, "--verbose")) {
1760 push_verbosely = 1;
1761 http_is_verbose = 1;
1762 continue;
1763 }
1764 if (!strcmp(arg, "-d")) {
1765 delete_branch = 1;
1766 continue;
1767 }
1768 if (!strcmp(arg, "-D")) {
1769 delete_branch = 1;
1770 force_delete = 1;
1771 continue;
1772 }
1773 if (!strcmp(arg, "-h"))
1774 usage(http_push_usage);
1775 }
1776 if (!repo->url) {
1777 char *path = strstr(arg, "//");
1778 str_end_url_with_slash(arg, &repo->url);
1779 repo->path_len = strlen(repo->url);
1780 if (path) {
1781 repo->path = strchr(path+2, '/');
1782 if (repo->path)
1783 repo->path_len = strlen(repo->path);
1784 }
1785 continue;
1786 }
1787 refspec = argv;
1788 nr_refspec = argc - i;
1789 break;
1790 }
1791
1792 #ifndef USE_CURL_MULTI
1793 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
1794 #endif
1795
1796 if (!repo->url)
1797 usage(http_push_usage);
1798
1799 if (delete_branch && nr_refspec != 1)
1800 die("You must specify only one branch name when deleting a remote branch");
1801
1802 setup_git_directory();
1803
1804 memset(remote_dir_exists, -1, 256);
1805
1806 http_init(NULL, repo->url, 1);
1807
1808 #ifdef USE_CURL_MULTI
1809 is_running_queue = 0;
1810 #endif
1811
1812 /* Verify DAV compliance/lock support */
1813 if (!locking_available()) {
1814 rc = 1;
1815 goto cleanup;
1816 }
1817
1818 sigchain_push_common(remove_locks_on_signal);
1819
1820 /* Check whether the remote has server info files */
1821 repo->can_update_info_refs = 0;
1822 repo->has_info_refs = remote_exists("info/refs");
1823 repo->has_info_packs = remote_exists("objects/info/packs");
1824 if (repo->has_info_refs) {
1825 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
1826 if (info_ref_lock)
1827 repo->can_update_info_refs = 1;
1828 else {
1829 error("cannot lock existing info/refs");
1830 rc = 1;
1831 goto cleanup;
1832 }
1833 }
1834 if (repo->has_info_packs)
1835 fetch_indices();
1836
1837 /* Get a list of all local and remote heads to validate refspecs */
1838 local_refs = get_local_heads();
1839 fprintf(stderr, "Fetching remote heads...\n");
1840 get_dav_remote_heads();
1841 run_request_queue();
1842
1843 /* Remove a remote branch if -d or -D was specified */
1844 if (delete_branch) {
1845 if (delete_remote_branch(refspec[0], force_delete) == -1) {
1846 fprintf(stderr, "Unable to delete remote branch %s\n",
1847 refspec[0]);
1848 if (helper_status)
1849 printf("error %s cannot remove\n", refspec[0]);
1850 }
1851 goto cleanup;
1852 }
1853
1854 /* match them up */
1855 if (match_push_refs(local_refs, &remote_refs,
1856 nr_refspec, (const char **) refspec, push_all)) {
1857 rc = -1;
1858 goto cleanup;
1859 }
1860 if (!remote_refs) {
1861 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
1862 if (helper_status)
1863 printf("error null no match\n");
1864 rc = 0;
1865 goto cleanup;
1866 }
1867
1868 new_refs = 0;
1869 for (ref = remote_refs; ref; ref = ref->next) {
1870 char old_hex[60], *new_hex;
1871 const char *commit_argv[5];
1872 int commit_argc;
1873 char *new_sha1_hex, *old_sha1_hex;
1874
1875 if (!ref->peer_ref)
1876 continue;
1877
1878 if (is_null_sha1(ref->peer_ref->new_sha1)) {
1879 if (delete_remote_branch(ref->name, 1) == -1) {
1880 error("Could not remove %s", ref->name);
1881 if (helper_status)
1882 printf("error %s cannot remove\n", ref->name);
1883 rc = -4;
1884 }
1885 else if (helper_status)
1886 printf("ok %s\n", ref->name);
1887 new_refs++;
1888 continue;
1889 }
1890
1891 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
1892 if (push_verbosely)
1893 fprintf(stderr, "'%s': up-to-date\n", ref->name);
1894 if (helper_status)
1895 printf("ok %s up to date\n", ref->name);
1896 continue;
1897 }
1898
1899 if (!force_all &&
1900 !is_null_sha1(ref->old_sha1) &&
1901 !ref->force) {
1902 if (!has_sha1_file(ref->old_sha1) ||
1903 !ref_newer(ref->peer_ref->new_sha1,
1904 ref->old_sha1)) {
1905 /*
1906 * We do not have the remote ref, or
1907 * we know that the remote ref is not
1908 * an ancestor of what we are trying to
1909 * push. Either way this can be losing
1910 * commits at the remote end and likely
1911 * we were not up to date to begin with.
1912 */
1913 error("remote '%s' is not an ancestor of\n"
1914 "local '%s'.\n"
1915 "Maybe you are not up-to-date and "
1916 "need to pull first?",
1917 ref->name,
1918 ref->peer_ref->name);
1919 if (helper_status)
1920 printf("error %s non-fast forward\n", ref->name);
1921 rc = -2;
1922 continue;
1923 }
1924 }
1925 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
1926 new_refs++;
1927 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
1928 new_hex = sha1_to_hex(ref->new_sha1);
1929
1930 fprintf(stderr, "updating '%s'", ref->name);
1931 if (strcmp(ref->name, ref->peer_ref->name))
1932 fprintf(stderr, " using '%s'", ref->peer_ref->name);
1933 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
1934 if (dry_run) {
1935 if (helper_status)
1936 printf("ok %s\n", ref->name);
1937 continue;
1938 }
1939
1940 /* Lock remote branch ref */
1941 ref_lock = lock_remote(ref->name, LOCK_TIME);
1942 if (ref_lock == NULL) {
1943 fprintf(stderr, "Unable to lock remote branch %s\n",
1944 ref->name);
1945 if (helper_status)
1946 printf("error %s lock error\n", ref->name);
1947 rc = 1;
1948 continue;
1949 }
1950
1951 /* Set up revision info for this refspec */
1952 commit_argc = 3;
1953 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
1954 old_sha1_hex = NULL;
1955 commit_argv[1] = "--objects";
1956 commit_argv[2] = new_sha1_hex;
1957 if (!push_all && !is_null_sha1(ref->old_sha1)) {
1958 old_sha1_hex = xmalloc(42);
1959 sprintf(old_sha1_hex, "^%s",
1960 sha1_to_hex(ref->old_sha1));
1961 commit_argv[3] = old_sha1_hex;
1962 commit_argc++;
1963 }
1964 commit_argv[commit_argc] = NULL;
1965 init_revisions(&revs, setup_git_directory());
1966 setup_revisions(commit_argc, commit_argv, &revs, NULL);
1967 revs.edge_hint = 0; /* just in case */
1968 free(new_sha1_hex);
1969 if (old_sha1_hex) {
1970 free(old_sha1_hex);
1971 commit_argv[1] = NULL;
1972 }
1973
1974 /* Generate a list of objects that need to be pushed */
1975 pushing = 0;
1976 if (prepare_revision_walk(&revs))
1977 die("revision walk setup failed");
1978 mark_edges_uninteresting(&revs, NULL);
1979 objects_to_send = get_delta(&revs, ref_lock);
1980 finish_all_active_slots();
1981
1982 /* Push missing objects to remote, this would be a
1983 convenient time to pack them first if appropriate. */
1984 pushing = 1;
1985 if (objects_to_send)
1986 fprintf(stderr, " sending %d objects\n",
1987 objects_to_send);
1988
1989 run_request_queue();
1990
1991 /* Update the remote branch if all went well */
1992 if (aborted || !update_remote(ref->new_sha1, ref_lock))
1993 rc = 1;
1994
1995 if (!rc)
1996 fprintf(stderr, " done\n");
1997 if (helper_status)
1998 printf("%s %s\n", !rc ? "ok" : "error", ref->name);
1999 unlock_remote(ref_lock);
2000 check_locks();
2001 }
2002
2003 /* Update remote server info if appropriate */
2004 if (repo->has_info_refs && new_refs) {
2005 if (info_ref_lock && repo->can_update_info_refs) {
2006 fprintf(stderr, "Updating remote server info\n");
2007 if (!dry_run)
2008 update_remote_info_refs(info_ref_lock);
2009 } else {
2010 fprintf(stderr, "Unable to update server info\n");
2011 }
2012 }
2013
2014 cleanup:
2015 if (info_ref_lock)
2016 unlock_remote(info_ref_lock);
2017 free(repo);
2018
2019 http_cleanup();
2020
2021 request = request_queue_head;
2022 while (request != NULL) {
2023 next_request = request->next;
2024 release_request(request);
2025 request = next_request;
2026 }
2027
2028 return rc;
2029 }
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