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use xstrfmt to replace xmalloc + sprintf
[git.git] / http-push.c
blob390f74c97b187158e94f77d0dfefdba3712421e1
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 /* Remember to update object flag allocation in object.h */
68 #define LOCAL (1u<<16)
69 #define REMOTE (1u<<17)
70 #define FETCHING (1u<<18)
71 #define PUSHING (1u<<19)
72
73 /* We allow "recursive" symbolic refs. Only within reason, though */
74 #define MAXDEPTH 5
75
76 static int pushing;
77 static int aborted;
78 static signed char remote_dir_exists[256];
79
80 static int push_verbosely;
81 static int push_all = MATCH_REFS_NONE;
82 static int force_all;
83 static int dry_run;
84 static int helper_status;
85
86 static struct object_list *objects;
87
88 struct repo {
89 char *url;
90 char *path;
91 int path_len;
92 int has_info_refs;
93 int can_update_info_refs;
94 int has_info_packs;
95 struct packed_git *packs;
96 struct remote_lock *locks;
97 };
98
99 static struct repo *repo;
100
101 enum transfer_state {
102 NEED_FETCH,
103 RUN_FETCH_LOOSE,
104 RUN_FETCH_PACKED,
105 NEED_PUSH,
106 RUN_MKCOL,
107 RUN_PUT,
108 RUN_MOVE,
109 ABORTED,
110 COMPLETE
111 };
112
113 struct transfer_request {
114 struct object *obj;
115 char *url;
116 char *dest;
117 struct remote_lock *lock;
118 struct curl_slist *headers;
119 struct buffer buffer;
120 enum transfer_state state;
121 CURLcode curl_result;
122 char errorstr[CURL_ERROR_SIZE];
123 long http_code;
124 void *userData;
125 struct active_request_slot *slot;
126 struct transfer_request *next;
127 };
128
129 static struct transfer_request *request_queue_head;
130
131 struct xml_ctx {
132 char *name;
133 int len;
134 char *cdata;
135 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
136 void *userData;
137 };
138
139 struct remote_lock {
140 char *url;
141 char *owner;
142 char *token;
143 char tmpfile_suffix[41];
144 time_t start_time;
145 long timeout;
146 int refreshing;
147 struct remote_lock *next;
148 };
149
150 /* Flags that control remote_ls processing */
151 #define PROCESS_FILES (1u << 0)
152 #define PROCESS_DIRS (1u << 1)
153 #define RECURSIVE (1u << 2)
154
155 /* Flags that remote_ls passes to callback functions */
156 #define IS_DIR (1u << 0)
157
158 struct remote_ls_ctx {
159 char *path;
160 void (*userFunc)(struct remote_ls_ctx *ls);
161 void *userData;
162 int flags;
163 char *dentry_name;
164 int dentry_flags;
165 struct remote_ls_ctx *parent;
166 };
167
168 /* get_dav_token_headers options */
169 enum dav_header_flag {
170 DAV_HEADER_IF = (1u << 0),
171 DAV_HEADER_LOCK = (1u << 1),
172 DAV_HEADER_TIMEOUT = (1u << 2)
173 };
174
175 static char *xml_entities(const char *s)
176 {
177 struct strbuf buf = STRBUF_INIT;
178 strbuf_addstr_xml_quoted(&buf, s);
179 return strbuf_detach(&buf, NULL);
180 }
181
182 static void curl_setup_http_get(CURL *curl, const char *url,
183 const char *custom_req)
184 {
185 curl_easy_setopt(curl, CURLOPT_HTTPGET, 1);
186 curl_easy_setopt(curl, CURLOPT_URL, url);
187 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
188 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_null);
189 }
190
191 static void curl_setup_http(CURL *curl, const char *url,
192 const char *custom_req, struct buffer *buffer,
193 curl_write_callback write_fn)
194 {
195 curl_easy_setopt(curl, CURLOPT_PUT, 1);
196 curl_easy_setopt(curl, CURLOPT_URL, url);
197 curl_easy_setopt(curl, CURLOPT_INFILE, buffer);
198 curl_easy_setopt(curl, CURLOPT_INFILESIZE, buffer->buf.len);
199 curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
200 #ifndef NO_CURL_IOCTL
201 curl_easy_setopt(curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
202 curl_easy_setopt(curl, CURLOPT_IOCTLDATA, &buffer);
203 #endif
204 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_fn);
205 curl_easy_setopt(curl, CURLOPT_NOBODY, 0);
206 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
207 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);
208 }
209
210 static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
211 {
212 struct strbuf buf = STRBUF_INIT;
213 struct curl_slist *dav_headers = NULL;
214
215 if (options & DAV_HEADER_IF) {
216 strbuf_addf(&buf, "If: (<%s>)", lock->token);
217 dav_headers = curl_slist_append(dav_headers, buf.buf);
218 strbuf_reset(&buf);
219 }
220 if (options & DAV_HEADER_LOCK) {
221 strbuf_addf(&buf, "Lock-Token: <%s>", lock->token);
222 dav_headers = curl_slist_append(dav_headers, buf.buf);
223 strbuf_reset(&buf);
224 }
225 if (options & DAV_HEADER_TIMEOUT) {
226 strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout);
227 dav_headers = curl_slist_append(dav_headers, buf.buf);
228 strbuf_reset(&buf);
229 }
230 strbuf_release(&buf);
231
232 return dav_headers;
233 }
234
235 static void finish_request(struct transfer_request *request);
236 static void release_request(struct transfer_request *request);
237
238 static void process_response(void *callback_data)
239 {
240 struct transfer_request *request =
241 (struct transfer_request *)callback_data;
242
243 finish_request(request);
244 }
245
246 #ifdef USE_CURL_MULTI
247
248 static void start_fetch_loose(struct transfer_request *request)
249 {
250 struct active_request_slot *slot;
251 struct http_object_request *obj_req;
252
253 obj_req = new_http_object_request(repo->url, request->obj->sha1);
254 if (obj_req == NULL) {
255 request->state = ABORTED;
256 return;
257 }
258
259 slot = obj_req->slot;
260 slot->callback_func = process_response;
261 slot->callback_data = request;
262 request->slot = slot;
263 request->userData = obj_req;
264
265 /* Try to get the request started, abort the request on error */
266 request->state = RUN_FETCH_LOOSE;
267 if (!start_active_slot(slot)) {
268 fprintf(stderr, "Unable to start GET request\n");
269 repo->can_update_info_refs = 0;
270 release_http_object_request(obj_req);
271 release_request(request);
272 }
273 }
274
275 static void start_mkcol(struct transfer_request *request)
276 {
277 char *hex = sha1_to_hex(request->obj->sha1);
278 struct active_request_slot *slot;
279
280 request->url = get_remote_object_url(repo->url, hex, 1);
281
282 slot = get_active_slot();
283 slot->callback_func = process_response;
284 slot->callback_data = request;
285 curl_setup_http_get(slot->curl, request->url, DAV_MKCOL);
286 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
287
288 if (start_active_slot(slot)) {
289 request->slot = slot;
290 request->state = RUN_MKCOL;
291 } else {
292 request->state = ABORTED;
293 free(request->url);
294 request->url = NULL;
295 }
296 }
297 #endif
298
299 static void start_fetch_packed(struct transfer_request *request)
300 {
301 struct packed_git *target;
302
303 struct transfer_request *check_request = request_queue_head;
304 struct http_pack_request *preq;
305
306 target = find_sha1_pack(request->obj->sha1, repo->packs);
307 if (!target) {
308 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
309 repo->can_update_info_refs = 0;
310 release_request(request);
311 return;
312 }
313
314 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
315 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
316
317 preq = new_http_pack_request(target, repo->url);
318 if (preq == NULL) {
319 release_http_pack_request(preq);
320 repo->can_update_info_refs = 0;
321 return;
322 }
323 preq->lst = &repo->packs;
324
325 /* Make sure there isn't another open request for this pack */
326 while (check_request) {
327 if (check_request->state == RUN_FETCH_PACKED &&
328 !strcmp(check_request->url, preq->url)) {
329 release_http_pack_request(preq);
330 release_request(request);
331 return;
332 }
333 check_request = check_request->next;
334 }
335
336 preq->slot->callback_func = process_response;
337 preq->slot->callback_data = request;
338 request->slot = preq->slot;
339 request->userData = preq;
340
341 /* Try to get the request started, abort the request on error */
342 request->state = RUN_FETCH_PACKED;
343 if (!start_active_slot(preq->slot)) {
344 fprintf(stderr, "Unable to start GET request\n");
345 release_http_pack_request(preq);
346 repo->can_update_info_refs = 0;
347 release_request(request);
348 }
349 }
350
351 static void start_put(struct transfer_request *request)
352 {
353 char *hex = sha1_to_hex(request->obj->sha1);
354 struct active_request_slot *slot;
355 struct strbuf buf = STRBUF_INIT;
356 enum object_type type;
357 char hdr[50];
358 void *unpacked;
359 unsigned long len;
360 int hdrlen;
361 ssize_t size;
362 git_zstream stream;
363
364 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
365 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
366
367 /* Set it up */
368 memset(&stream, 0, sizeof(stream));
369 git_deflate_init(&stream, zlib_compression_level);
370 size = git_deflate_bound(&stream, len + hdrlen);
371 strbuf_init(&request->buffer.buf, size);
372 request->buffer.posn = 0;
373
374 /* Compress it */
375 stream.next_out = (unsigned char *)request->buffer.buf.buf;
376 stream.avail_out = size;
377
378 /* First header.. */
379 stream.next_in = (void *)hdr;
380 stream.avail_in = hdrlen;
381 while (git_deflate(&stream, 0) == Z_OK)
382 ; /* nothing */
383
384 /* Then the data itself.. */
385 stream.next_in = unpacked;
386 stream.avail_in = len;
387 while (git_deflate(&stream, Z_FINISH) == Z_OK)
388 ; /* nothing */
389 git_deflate_end(&stream);
390 free(unpacked);
391
392 request->buffer.buf.len = stream.total_out;
393
394 strbuf_addstr(&buf, "Destination: ");
395 append_remote_object_url(&buf, repo->url, hex, 0);
396 request->dest = strbuf_detach(&buf, NULL);
397
398 append_remote_object_url(&buf, repo->url, hex, 0);
399 strbuf_add(&buf, request->lock->tmpfile_suffix, 41);
400 request->url = strbuf_detach(&buf, NULL);
401
402 slot = get_active_slot();
403 slot->callback_func = process_response;
404 slot->callback_data = request;
405 curl_setup_http(slot->curl, request->url, DAV_PUT,
406 &request->buffer, fwrite_null);
407
408 if (start_active_slot(slot)) {
409 request->slot = slot;
410 request->state = RUN_PUT;
411 } else {
412 request->state = ABORTED;
413 free(request->url);
414 request->url = NULL;
415 }
416 }
417
418 static void start_move(struct transfer_request *request)
419 {
420 struct active_request_slot *slot;
421 struct curl_slist *dav_headers = NULL;
422
423 slot = get_active_slot();
424 slot->callback_func = process_response;
425 slot->callback_data = request;
426 curl_setup_http_get(slot->curl, request->url, DAV_MOVE);
427 dav_headers = curl_slist_append(dav_headers, request->dest);
428 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
429 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
430
431 if (start_active_slot(slot)) {
432 request->slot = slot;
433 request->state = RUN_MOVE;
434 } else {
435 request->state = ABORTED;
436 free(request->url);
437 request->url = NULL;
438 }
439 }
440
441 static int refresh_lock(struct remote_lock *lock)
442 {
443 struct active_request_slot *slot;
444 struct slot_results results;
445 struct curl_slist *dav_headers;
446 int rc = 0;
447
448 lock->refreshing = 1;
449
450 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
451
452 slot = get_active_slot();
453 slot->results = &results;
454 curl_setup_http_get(slot->curl, lock->url, DAV_LOCK);
455 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
456
457 if (start_active_slot(slot)) {
458 run_active_slot(slot);
459 if (results.curl_result != CURLE_OK) {
460 fprintf(stderr, "LOCK HTTP error %ld\n",
461 results.http_code);
462 } else {
463 lock->start_time = time(NULL);
464 rc = 1;
465 }
466 }
467
468 lock->refreshing = 0;
469 curl_slist_free_all(dav_headers);
470
471 return rc;
472 }
473
474 static void check_locks(void)
475 {
476 struct remote_lock *lock = repo->locks;
477 time_t current_time = time(NULL);
478 int time_remaining;
479
480 while (lock) {
481 time_remaining = lock->start_time + lock->timeout -
482 current_time;
483 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
484 if (!refresh_lock(lock)) {
485 fprintf(stderr,
486 "Unable to refresh lock for %s\n",
487 lock->url);
488 aborted = 1;
489 return;
490 }
491 }
492 lock = lock->next;
493 }
494 }
495
496 static void release_request(struct transfer_request *request)
497 {
498 struct transfer_request *entry = request_queue_head;
499
500 if (request == request_queue_head) {
501 request_queue_head = request->next;
502 } else {
503 while (entry->next != NULL && entry->next != request)
504 entry = entry->next;
505 if (entry->next == request)
506 entry->next = entry->next->next;
507 }
508
509 free(request->url);
510 free(request);
511 }
512
513 static void finish_request(struct transfer_request *request)
514 {
515 struct http_pack_request *preq;
516 struct http_object_request *obj_req;
517
518 request->curl_result = request->slot->curl_result;
519 request->http_code = request->slot->http_code;
520 request->slot = NULL;
521
522 /* Keep locks active */
523 check_locks();
524
525 if (request->headers != NULL)
526 curl_slist_free_all(request->headers);
527
528 /* URL is reused for MOVE after PUT */
529 if (request->state != RUN_PUT) {
530 free(request->url);
531 request->url = NULL;
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->sha1[0]] = 1;
538 start_put(request);
539 } else {
540 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
541 sha1_to_hex(request->obj->sha1),
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 sha1_to_hex(request->obj->sha1),
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 sha1_to_hex(request->obj->sha1));
561 request->obj->flags |= REMOTE;
562 release_request(request);
563 } else {
564 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
565 sha1_to_hex(request->obj->sha1),
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->sha1[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->sha1[0]] == -1)
643 get_remote_object_list(obj->sha1[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->sha1[0]] == -1)
676 get_remote_object_list(obj->sha1[0]);
677 if (obj->flags & (REMOTE | PUSHING))
678 return 0;
679 target = find_sha1_pack(obj->sha1, 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 char *hex)
723 {
724 unsigned char sha1[20];
725 struct object *obj;
726
727 if (get_sha1_hex(hex, sha1) != 0)
728 return;
729
730 obj = lookup_object(sha1);
731 if (!obj)
732 obj = parse_object(sha1);
733
734 /* Ignore remote objects that don't exist locally */
735 if (!obj)
736 return;
737
738 obj->flags |= REMOTE;
739 if (!object_list_contains(objects, obj))
740 object_list_insert(obj, &objects);
741 }
742
743 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
744 {
745 int *lock_flags = (int *)ctx->userData;
746
747 if (tag_closed) {
748 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
749 if ((*lock_flags & DAV_PROP_LOCKEX) &&
750 (*lock_flags & DAV_PROP_LOCKWR)) {
751 *lock_flags |= DAV_LOCK_OK;
752 }
753 *lock_flags &= DAV_LOCK_OK;
754 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
755 *lock_flags |= DAV_PROP_LOCKWR;
756 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
757 *lock_flags |= DAV_PROP_LOCKEX;
758 }
759 }
760 }
761
762 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
763 {
764 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
765 git_SHA_CTX sha_ctx;
766 unsigned char lock_token_sha1[20];
767
768 if (tag_closed && ctx->cdata) {
769 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
770 lock->owner = xstrdup(ctx->cdata);
771 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
772 if (starts_with(ctx->cdata, "Second-"))
773 lock->timeout =
774 strtol(ctx->cdata + 7, NULL, 10);
775 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
776 lock->token = xstrdup(ctx->cdata);
777
778 git_SHA1_Init(&sha_ctx);
779 git_SHA1_Update(&sha_ctx, lock->token, strlen(lock->token));
780 git_SHA1_Final(lock_token_sha1, &sha_ctx);
781
782 lock->tmpfile_suffix[0] = '_';
783 memcpy(lock->tmpfile_suffix + 1, sha1_to_hex(lock_token_sha1), 40);
784 }
785 }
786 }
787
788 static void one_remote_ref(const char *refname);
789
790 static void
791 xml_start_tag(void *userData, const char *name, const char **atts)
792 {
793 struct xml_ctx *ctx = (struct xml_ctx *)userData;
794 const char *c = strchr(name, ':');
795 int new_len;
796
797 if (c == NULL)
798 c = name;
799 else
800 c++;
801
802 new_len = strlen(ctx->name) + strlen(c) + 2;
803
804 if (new_len > ctx->len) {
805 ctx->name = xrealloc(ctx->name, new_len);
806 ctx->len = new_len;
807 }
808 strcat(ctx->name, ".");
809 strcat(ctx->name, c);
810
811 free(ctx->cdata);
812 ctx->cdata = NULL;
813
814 ctx->userFunc(ctx, 0);
815 }
816
817 static void
818 xml_end_tag(void *userData, const char *name)
819 {
820 struct xml_ctx *ctx = (struct xml_ctx *)userData;
821 const char *c = strchr(name, ':');
822 char *ep;
823
824 ctx->userFunc(ctx, 1);
825
826 if (c == NULL)
827 c = name;
828 else
829 c++;
830
831 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
832 *ep = 0;
833 }
834
835 static void
836 xml_cdata(void *userData, const XML_Char *s, int len)
837 {
838 struct xml_ctx *ctx = (struct xml_ctx *)userData;
839 free(ctx->cdata);
840 ctx->cdata = xmemdupz(s, len);
841 }
842
843 static struct remote_lock *lock_remote(const char *path, long timeout)
844 {
845 struct active_request_slot *slot;
846 struct slot_results results;
847 struct buffer out_buffer = { STRBUF_INIT, 0 };
848 struct strbuf in_buffer = STRBUF_INIT;
849 char *url;
850 char *ep;
851 char timeout_header[25];
852 struct remote_lock *lock = NULL;
853 struct curl_slist *dav_headers = NULL;
854 struct xml_ctx ctx;
855 char *escaped;
856
857 url = xstrfmt("%s%s", repo->url, path);
858
859 /* Make sure leading directories exist for the remote ref */
860 ep = strchr(url + strlen(repo->url) + 1, '/');
861 while (ep) {
862 char saved_character = ep[1];
863 ep[1] = '\0';
864 slot = get_active_slot();
865 slot->results = &results;
866 curl_setup_http_get(slot->curl, url, DAV_MKCOL);
867 if (start_active_slot(slot)) {
868 run_active_slot(slot);
869 if (results.curl_result != CURLE_OK &&
870 results.http_code != 405) {
871 fprintf(stderr,
872 "Unable to create branch path %s\n",
873 url);
874 free(url);
875 return NULL;
876 }
877 } else {
878 fprintf(stderr, "Unable to start MKCOL request\n");
879 free(url);
880 return NULL;
881 }
882 ep[1] = saved_character;
883 ep = strchr(ep + 1, '/');
884 }
885
886 escaped = xml_entities(ident_default_email());
887 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
888 free(escaped);
889
890 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
891 dav_headers = curl_slist_append(dav_headers, timeout_header);
892 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
893
894 slot = get_active_slot();
895 slot->results = &results;
896 curl_setup_http(slot->curl, url, DAV_LOCK, &out_buffer, fwrite_buffer);
897 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
898 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
899
900 lock = xcalloc(1, sizeof(*lock));
901 lock->timeout = -1;
902
903 if (start_active_slot(slot)) {
904 run_active_slot(slot);
905 if (results.curl_result == CURLE_OK) {
906 XML_Parser parser = XML_ParserCreate(NULL);
907 enum XML_Status result;
908 ctx.name = xcalloc(10, 1);
909 ctx.len = 0;
910 ctx.cdata = NULL;
911 ctx.userFunc = handle_new_lock_ctx;
912 ctx.userData = lock;
913 XML_SetUserData(parser, &ctx);
914 XML_SetElementHandler(parser, xml_start_tag,
915 xml_end_tag);
916 XML_SetCharacterDataHandler(parser, xml_cdata);
917 result = XML_Parse(parser, in_buffer.buf,
918 in_buffer.len, 1);
919 free(ctx.name);
920 if (result != XML_STATUS_OK) {
921 fprintf(stderr, "XML error: %s\n",
922 XML_ErrorString(
923 XML_GetErrorCode(parser)));
924 lock->timeout = -1;
925 }
926 XML_ParserFree(parser);
927 }
928 } else {
929 fprintf(stderr, "Unable to start LOCK request\n");
930 }
931
932 curl_slist_free_all(dav_headers);
933 strbuf_release(&out_buffer.buf);
934 strbuf_release(&in_buffer);
935
936 if (lock->token == NULL || lock->timeout <= 0) {
937 free(lock->token);
938 free(lock->owner);
939 free(url);
940 free(lock);
941 lock = NULL;
942 } else {
943 lock->url = url;
944 lock->start_time = time(NULL);
945 lock->next = repo->locks;
946 repo->locks = lock;
947 }
948
949 return lock;
950 }
951
952 static int unlock_remote(struct remote_lock *lock)
953 {
954 struct active_request_slot *slot;
955 struct slot_results results;
956 struct remote_lock *prev = repo->locks;
957 struct curl_slist *dav_headers;
958 int rc = 0;
959
960 dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
961
962 slot = get_active_slot();
963 slot->results = &results;
964 curl_setup_http_get(slot->curl, lock->url, DAV_UNLOCK);
965 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
966
967 if (start_active_slot(slot)) {
968 run_active_slot(slot);
969 if (results.curl_result == CURLE_OK)
970 rc = 1;
971 else
972 fprintf(stderr, "UNLOCK HTTP error %ld\n",
973 results.http_code);
974 } else {
975 fprintf(stderr, "Unable to start UNLOCK request\n");
976 }
977
978 curl_slist_free_all(dav_headers);
979
980 if (repo->locks == lock) {
981 repo->locks = lock->next;
982 } else {
983 while (prev && prev->next != lock)
984 prev = prev->next;
985 if (prev)
986 prev->next = prev->next->next;
987 }
988
989 free(lock->owner);
990 free(lock->url);
991 free(lock->token);
992 free(lock);
993
994 return rc;
995 }
996
997 static void remove_locks(void)
998 {
999 struct remote_lock *lock = repo->locks;
1000
1001 fprintf(stderr, "Removing remote locks...\n");
1002 while (lock) {
1003 struct remote_lock *next = lock->next;
1004 unlock_remote(lock);
1005 lock = next;
1006 }
1007 }
1008
1009 static void remove_locks_on_signal(int signo)
1010 {
1011 remove_locks();
1012 sigchain_pop(signo);
1013 raise(signo);
1014 }
1015
1016 static void remote_ls(const char *path, int flags,
1017 void (*userFunc)(struct remote_ls_ctx *ls),
1018 void *userData);
1019
1020 static void process_ls_object(struct remote_ls_ctx *ls)
1021 {
1022 unsigned int *parent = (unsigned int *)ls->userData;
1023 char *path = ls->dentry_name;
1024 char *obj_hex;
1025
1026 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1027 remote_dir_exists[*parent] = 1;
1028 return;
1029 }
1030
1031 if (strlen(path) != 49)
1032 return;
1033 path += 8;
1034 obj_hex = xmalloc(strlen(path));
1035 /* NB: path is not null-terminated, can not use strlcpy here */
1036 memcpy(obj_hex, path, 2);
1037 strcpy(obj_hex + 2, path + 3);
1038 one_remote_object(obj_hex);
1039 free(obj_hex);
1040 }
1041
1042 static void process_ls_ref(struct remote_ls_ctx *ls)
1043 {
1044 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1045 fprintf(stderr, " %s\n", ls->dentry_name);
1046 return;
1047 }
1048
1049 if (!(ls->dentry_flags & IS_DIR))
1050 one_remote_ref(ls->dentry_name);
1051 }
1052
1053 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1054 {
1055 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1056
1057 if (tag_closed) {
1058 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1059 if (ls->dentry_flags & IS_DIR) {
1060
1061 /* ensure collection names end with slash */
1062 str_end_url_with_slash(ls->dentry_name, &ls->dentry_name);
1063
1064 if (ls->flags & PROCESS_DIRS) {
1065 ls->userFunc(ls);
1066 }
1067 if (strcmp(ls->dentry_name, ls->path) &&
1068 ls->flags & RECURSIVE) {
1069 remote_ls(ls->dentry_name,
1070 ls->flags,
1071 ls->userFunc,
1072 ls->userData);
1073 }
1074 } else if (ls->flags & PROCESS_FILES) {
1075 ls->userFunc(ls);
1076 }
1077 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1078 char *path = ctx->cdata;
1079 if (*ctx->cdata == 'h') {
1080 path = strstr(path, "//");
1081 if (path) {
1082 path = strchr(path+2, '/');
1083 }
1084 }
1085 if (path) {
1086 const char *url = repo->url;
1087 if (repo->path)
1088 url = repo->path;
1089 if (strncmp(path, url, repo->path_len))
1090 error("Parsed path '%s' does not match url: '%s'",
1091 path, url);
1092 else {
1093 path += repo->path_len;
1094 ls->dentry_name = xstrdup(path);
1095 }
1096 }
1097 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1098 ls->dentry_flags |= IS_DIR;
1099 }
1100 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1101 free(ls->dentry_name);
1102 ls->dentry_name = NULL;
1103 ls->dentry_flags = 0;
1104 }
1105 }
1106
1107 /*
1108 * NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it
1109 * should _only_ heed the information from that file, instead of trying to
1110 * determine the refs from the remote file system (badly: it does not even
1111 * know about packed-refs).
1112 */
1113 static void remote_ls(const char *path, int flags,
1114 void (*userFunc)(struct remote_ls_ctx *ls),
1115 void *userData)
1116 {
1117 char *url = xstrfmt("%s%s", repo->url, path);
1118 struct active_request_slot *slot;
1119 struct slot_results results;
1120 struct strbuf in_buffer = STRBUF_INIT;
1121 struct buffer out_buffer = { STRBUF_INIT, 0 };
1122 struct curl_slist *dav_headers = NULL;
1123 struct xml_ctx ctx;
1124 struct remote_ls_ctx ls;
1125
1126 ls.flags = flags;
1127 ls.path = xstrdup(path);
1128 ls.dentry_name = NULL;
1129 ls.dentry_flags = 0;
1130 ls.userData = userData;
1131 ls.userFunc = userFunc;
1132
1133 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1134
1135 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1136 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1137
1138 slot = get_active_slot();
1139 slot->results = &results;
1140 curl_setup_http(slot->curl, url, DAV_PROPFIND,
1141 &out_buffer, fwrite_buffer);
1142 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1143 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1144
1145 if (start_active_slot(slot)) {
1146 run_active_slot(slot);
1147 if (results.curl_result == CURLE_OK) {
1148 XML_Parser parser = XML_ParserCreate(NULL);
1149 enum XML_Status result;
1150 ctx.name = xcalloc(10, 1);
1151 ctx.len = 0;
1152 ctx.cdata = NULL;
1153 ctx.userFunc = handle_remote_ls_ctx;
1154 ctx.userData = &ls;
1155 XML_SetUserData(parser, &ctx);
1156 XML_SetElementHandler(parser, xml_start_tag,
1157 xml_end_tag);
1158 XML_SetCharacterDataHandler(parser, xml_cdata);
1159 result = XML_Parse(parser, in_buffer.buf,
1160 in_buffer.len, 1);
1161 free(ctx.name);
1162
1163 if (result != XML_STATUS_OK) {
1164 fprintf(stderr, "XML error: %s\n",
1165 XML_ErrorString(
1166 XML_GetErrorCode(parser)));
1167 }
1168 XML_ParserFree(parser);
1169 }
1170 } else {
1171 fprintf(stderr, "Unable to start PROPFIND request\n");
1172 }
1173
1174 free(ls.path);
1175 free(url);
1176 strbuf_release(&out_buffer.buf);
1177 strbuf_release(&in_buffer);
1178 curl_slist_free_all(dav_headers);
1179 }
1180
1181 static void get_remote_object_list(unsigned char parent)
1182 {
1183 char path[] = "objects/XX/";
1184 static const char hex[] = "0123456789abcdef";
1185 unsigned int val = parent;
1186
1187 path[8] = hex[val >> 4];
1188 path[9] = hex[val & 0xf];
1189 remote_dir_exists[val] = 0;
1190 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1191 process_ls_object, &val);
1192 }
1193
1194 static int locking_available(void)
1195 {
1196 struct active_request_slot *slot;
1197 struct slot_results results;
1198 struct strbuf in_buffer = STRBUF_INIT;
1199 struct buffer out_buffer = { STRBUF_INIT, 0 };
1200 struct curl_slist *dav_headers = NULL;
1201 struct xml_ctx ctx;
1202 int lock_flags = 0;
1203 char *escaped;
1204
1205 escaped = xml_entities(repo->url);
1206 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
1207 free(escaped);
1208
1209 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1210 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1211
1212 slot = get_active_slot();
1213 slot->results = &results;
1214 curl_setup_http(slot->curl, repo->url, DAV_PROPFIND,
1215 &out_buffer, fwrite_buffer);
1216 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1217 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1218
1219 if (start_active_slot(slot)) {
1220 run_active_slot(slot);
1221 if (results.curl_result == CURLE_OK) {
1222 XML_Parser parser = XML_ParserCreate(NULL);
1223 enum XML_Status result;
1224 ctx.name = xcalloc(10, 1);
1225 ctx.len = 0;
1226 ctx.cdata = NULL;
1227 ctx.userFunc = handle_lockprop_ctx;
1228 ctx.userData = &lock_flags;
1229 XML_SetUserData(parser, &ctx);
1230 XML_SetElementHandler(parser, xml_start_tag,
1231 xml_end_tag);
1232 result = XML_Parse(parser, in_buffer.buf,
1233 in_buffer.len, 1);
1234 free(ctx.name);
1235
1236 if (result != XML_STATUS_OK) {
1237 fprintf(stderr, "XML error: %s\n",
1238 XML_ErrorString(
1239 XML_GetErrorCode(parser)));
1240 lock_flags = 0;
1241 }
1242 XML_ParserFree(parser);
1243 if (!lock_flags)
1244 error("no DAV locking support on %s",
1245 repo->url);
1246
1247 } else {
1248 error("Cannot access URL %s, return code %d",
1249 repo->url, results.curl_result);
1250 lock_flags = 0;
1251 }
1252 } else {
1253 error("Unable to start PROPFIND request on %s", repo->url);
1254 }
1255
1256 strbuf_release(&out_buffer.buf);
1257 strbuf_release(&in_buffer);
1258 curl_slist_free_all(dav_headers);
1259
1260 return lock_flags;
1261 }
1262
1263 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1264 {
1265 struct object_list *entry = xmalloc(sizeof(struct object_list));
1266 entry->item = obj;
1267 entry->next = *p;
1268 *p = entry;
1269 return &entry->next;
1270 }
1271
1272 static struct object_list **process_blob(struct blob *blob,
1273 struct object_list **p,
1274 struct name_path *path,
1275 const char *name)
1276 {
1277 struct object *obj = &blob->object;
1278
1279 obj->flags |= LOCAL;
1280
1281 if (obj->flags & (UNINTERESTING | SEEN))
1282 return p;
1283
1284 obj->flags |= SEEN;
1285 return add_one_object(obj, p);
1286 }
1287
1288 static struct object_list **process_tree(struct tree *tree,
1289 struct object_list **p,
1290 struct name_path *path,
1291 const char *name)
1292 {
1293 struct object *obj = &tree->object;
1294 struct tree_desc desc;
1295 struct name_entry entry;
1296 struct name_path me;
1297
1298 obj->flags |= LOCAL;
1299
1300 if (obj->flags & (UNINTERESTING | SEEN))
1301 return p;
1302 if (parse_tree(tree) < 0)
1303 die("bad tree object %s", sha1_to_hex(obj->sha1));
1304
1305 obj->flags |= SEEN;
1306 name = xstrdup(name);
1307 p = add_one_object(obj, p);
1308 me.up = path;
1309 me.elem = name;
1310 me.elem_len = strlen(name);
1311
1312 init_tree_desc(&desc, tree->buffer, tree->size);
1313
1314 while (tree_entry(&desc, &entry))
1315 switch (object_type(entry.mode)) {
1316 case OBJ_TREE:
1317 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1318 break;
1319 case OBJ_BLOB:
1320 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
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(commit->tree, p, NULL, "");
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, NULL, name);
1359 continue;
1360 }
1361 if (obj->type == OBJ_BLOB) {
1362 p = process_blob((struct blob *)obj, p, NULL, name);
1363 continue;
1364 }
1365 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), 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(unsigned char *sha1, 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", sha1_to_hex(sha1));
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_sha1_file(ref->old_sha1)) {
1435 obj = lookup_unknown_object(ref->old_sha1);
1436 if (obj) {
1437 fprintf(stderr, " fetch %s for %s\n",
1438 sha1_to_hex(ref->old_sha1), refname);
1439 add_fetch_request(obj);
1440 }
1441 }
1442
1443 ref->next = remote_refs;
1444 remote_refs = ref;
1445 }
1446
1447 static void get_dav_remote_heads(void)
1448 {
1449 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1450 }
1451
1452 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1453 {
1454 struct strbuf *buf = (struct strbuf *)ls->userData;
1455 struct object *o;
1456 int len;
1457 char *ref_info;
1458 struct ref *ref;
1459
1460 ref = alloc_ref(ls->dentry_name);
1461
1462 if (http_fetch_ref(repo->url, ref) != 0) {
1463 fprintf(stderr,
1464 "Unable to fetch ref %s from %s\n",
1465 ls->dentry_name, repo->url);
1466 aborted = 1;
1467 free(ref);
1468 return;
1469 }
1470
1471 o = parse_object(ref->old_sha1);
1472 if (!o) {
1473 fprintf(stderr,
1474 "Unable to parse object %s for remote ref %s\n",
1475 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1476 aborted = 1;
1477 free(ref);
1478 return;
1479 }
1480
1481 len = strlen(ls->dentry_name) + 42;
1482 ref_info = xcalloc(len + 1, 1);
1483 sprintf(ref_info, "%s %s\n",
1484 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1485 fwrite_buffer(ref_info, 1, len, buf);
1486 free(ref_info);
1487
1488 if (o->type == OBJ_TAG) {
1489 o = deref_tag(o, ls->dentry_name, 0);
1490 if (o) {
1491 len = strlen(ls->dentry_name) + 45;
1492 ref_info = xcalloc(len + 1, 1);
1493 sprintf(ref_info, "%s %s^{}\n",
1494 sha1_to_hex(o->sha1), ls->dentry_name);
1495 fwrite_buffer(ref_info, 1, len, buf);
1496 free(ref_info);
1497 }
1498 }
1499 free(ref);
1500 }
1501
1502 static void update_remote_info_refs(struct remote_lock *lock)
1503 {
1504 struct buffer buffer = { STRBUF_INIT, 0 };
1505 struct active_request_slot *slot;
1506 struct slot_results results;
1507 struct curl_slist *dav_headers;
1508
1509 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1510 add_remote_info_ref, &buffer.buf);
1511 if (!aborted) {
1512 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1513
1514 slot = get_active_slot();
1515 slot->results = &results;
1516 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1517 &buffer, fwrite_null);
1518 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1519
1520 if (start_active_slot(slot)) {
1521 run_active_slot(slot);
1522 if (results.curl_result != CURLE_OK) {
1523 fprintf(stderr,
1524 "PUT error: curl result=%d, HTTP code=%ld\n",
1525 results.curl_result, results.http_code);
1526 }
1527 }
1528 }
1529 strbuf_release(&buffer.buf);
1530 }
1531
1532 static int remote_exists(const char *path)
1533 {
1534 char *url = xstrfmt("%s%s", repo->url, path);
1535 int ret;
1536
1537
1538 switch (http_get_strbuf(url, NULL, NULL)) {
1539 case HTTP_OK:
1540 ret = 1;
1541 break;
1542 case HTTP_MISSING_TARGET:
1543 ret = 0;
1544 break;
1545 case HTTP_ERROR:
1546 error("unable to access '%s': %s", url, curl_errorstr);
1547 default:
1548 ret = -1;
1549 }
1550 free(url);
1551 return ret;
1552 }
1553
1554 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
1555 {
1556 char *url = xstrfmt("%s%s", repo->url, path);
1557 struct strbuf buffer = STRBUF_INIT;
1558
1559 if (http_get_strbuf(url, &buffer, NULL) != HTTP_OK)
1560 die("Couldn't get %s for remote symref\n%s", url,
1561 curl_errorstr);
1562 free(url);
1563
1564 free(*symref);
1565 *symref = NULL;
1566 hashclr(sha1);
1567
1568 if (buffer.len == 0)
1569 return;
1570
1571 /* If it's a symref, set the refname; otherwise try for a sha1 */
1572 if (starts_with((char *)buffer.buf, "ref: ")) {
1573 *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
1574 } else {
1575 get_sha1_hex(buffer.buf, sha1);
1576 }
1577
1578 strbuf_release(&buffer);
1579 }
1580
1581 static int verify_merge_base(unsigned char *head_sha1, struct ref *remote)
1582 {
1583 struct commit *head = lookup_commit_or_die(head_sha1, "HEAD");
1584 struct commit *branch = lookup_commit_or_die(remote->old_sha1, remote->name);
1585
1586 return in_merge_bases(branch, head);
1587 }
1588
1589 static int delete_remote_branch(const char *pattern, int force)
1590 {
1591 struct ref *refs = remote_refs;
1592 struct ref *remote_ref = NULL;
1593 unsigned char head_sha1[20];
1594 char *symref = NULL;
1595 int match;
1596 int patlen = strlen(pattern);
1597 int i;
1598 struct active_request_slot *slot;
1599 struct slot_results results;
1600 char *url;
1601
1602 /* Find the remote branch(es) matching the specified branch name */
1603 for (match = 0; refs; refs = refs->next) {
1604 char *name = refs->name;
1605 int namelen = strlen(name);
1606 if (namelen < patlen ||
1607 memcmp(name + namelen - patlen, pattern, patlen))
1608 continue;
1609 if (namelen != patlen && name[namelen - patlen - 1] != '/')
1610 continue;
1611 match++;
1612 remote_ref = refs;
1613 }
1614 if (match == 0)
1615 return error("No remote branch matches %s", pattern);
1616 if (match != 1)
1617 return error("More than one remote branch matches %s",
1618 pattern);
1619
1620 /*
1621 * Remote HEAD must be a symref (not exactly foolproof; a remote
1622 * symlink to a symref will look like a symref)
1623 */
1624 fetch_symref("HEAD", &symref, head_sha1);
1625 if (!symref)
1626 return error("Remote HEAD is not a symref");
1627
1628 /* Remote branch must not be the remote HEAD */
1629 for (i = 0; symref && i < MAXDEPTH; i++) {
1630 if (!strcmp(remote_ref->name, symref))
1631 return error("Remote branch %s is the current HEAD",
1632 remote_ref->name);
1633 fetch_symref(symref, &symref, head_sha1);
1634 }
1635
1636 /* Run extra sanity checks if delete is not forced */
1637 if (!force) {
1638 /* Remote HEAD must resolve to a known object */
1639 if (symref)
1640 return error("Remote HEAD symrefs too deep");
1641 if (is_null_sha1(head_sha1))
1642 return error("Unable to resolve remote HEAD");
1643 if (!has_sha1_file(head_sha1))
1644 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
1645
1646 /* Remote branch must resolve to a known object */
1647 if (is_null_sha1(remote_ref->old_sha1))
1648 return error("Unable to resolve remote branch %s",
1649 remote_ref->name);
1650 if (!has_sha1_file(remote_ref->old_sha1))
1651 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));
1652
1653 /* Remote branch must be an ancestor of remote HEAD */
1654 if (!verify_merge_base(head_sha1, remote_ref)) {
1655 return error("The branch '%s' is not an ancestor "
1656 "of your current HEAD.\n"
1657 "If you are sure you want to delete it,"
1658 " run:\n\t'git http-push -D %s %s'",
1659 remote_ref->name, repo->url, pattern);
1660 }
1661 }
1662
1663 /* Send delete request */
1664 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
1665 if (dry_run)
1666 return 0;
1667 url = xstrfmt("%s%s", repo->url, remote_ref->name);
1668 slot = get_active_slot();
1669 slot->results = &results;
1670 curl_setup_http_get(slot->curl, url, DAV_DELETE);
1671 if (start_active_slot(slot)) {
1672 run_active_slot(slot);
1673 free(url);
1674 if (results.curl_result != CURLE_OK)
1675 return error("DELETE request failed (%d/%ld)",
1676 results.curl_result, results.http_code);
1677 } else {
1678 free(url);
1679 return error("Unable to start DELETE request");
1680 }
1681
1682 return 0;
1683 }
1684
1685 static void run_request_queue(void)
1686 {
1687 #ifdef USE_CURL_MULTI
1688 is_running_queue = 1;
1689 fill_active_slots();
1690 add_fill_function(NULL, fill_active_slot);
1691 #endif
1692 do {
1693 finish_all_active_slots();
1694 #ifdef USE_CURL_MULTI
1695 fill_active_slots();
1696 #endif
1697 } while (request_queue_head && !aborted);
1698
1699 #ifdef USE_CURL_MULTI
1700 is_running_queue = 0;
1701 #endif
1702 }
1703
1704 int main(int argc, char **argv)
1705 {
1706 struct transfer_request *request;
1707 struct transfer_request *next_request;
1708 int nr_refspec = 0;
1709 char **refspec = NULL;
1710 struct remote_lock *ref_lock = NULL;
1711 struct remote_lock *info_ref_lock = NULL;
1712 struct rev_info revs;
1713 int delete_branch = 0;
1714 int force_delete = 0;
1715 int objects_to_send;
1716 int rc = 0;
1717 int i;
1718 int new_refs;
1719 struct ref *ref, *local_refs;
1720
1721 git_setup_gettext();
1722
1723 git_extract_argv0_path(argv[0]);
1724
1725 repo = xcalloc(1, sizeof(*repo));
1726
1727 argv++;
1728 for (i = 1; i < argc; i++, argv++) {
1729 char *arg = *argv;
1730
1731 if (*arg == '-') {
1732 if (!strcmp(arg, "--all")) {
1733 push_all = MATCH_REFS_ALL;
1734 continue;
1735 }
1736 if (!strcmp(arg, "--force")) {
1737 force_all = 1;
1738 continue;
1739 }
1740 if (!strcmp(arg, "--dry-run")) {
1741 dry_run = 1;
1742 continue;
1743 }
1744 if (!strcmp(arg, "--helper-status")) {
1745 helper_status = 1;
1746 continue;
1747 }
1748 if (!strcmp(arg, "--verbose")) {
1749 push_verbosely = 1;
1750 http_is_verbose = 1;
1751 continue;
1752 }
1753 if (!strcmp(arg, "-d")) {
1754 delete_branch = 1;
1755 continue;
1756 }
1757 if (!strcmp(arg, "-D")) {
1758 delete_branch = 1;
1759 force_delete = 1;
1760 continue;
1761 }
1762 if (!strcmp(arg, "-h"))
1763 usage(http_push_usage);
1764 }
1765 if (!repo->url) {
1766 char *path = strstr(arg, "//");
1767 str_end_url_with_slash(arg, &repo->url);
1768 repo->path_len = strlen(repo->url);
1769 if (path) {
1770 repo->path = strchr(path+2, '/');
1771 if (repo->path)
1772 repo->path_len = strlen(repo->path);
1773 }
1774 continue;
1775 }
1776 refspec = argv;
1777 nr_refspec = argc - i;
1778 break;
1779 }
1780
1781 #ifndef USE_CURL_MULTI
1782 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
1783 #endif
1784
1785 if (!repo->url)
1786 usage(http_push_usage);
1787
1788 if (delete_branch && nr_refspec != 1)
1789 die("You must specify only one branch name when deleting a remote branch");
1790
1791 setup_git_directory();
1792
1793 memset(remote_dir_exists, -1, 256);
1794
1795 http_init(NULL, repo->url, 1);
1796
1797 #ifdef USE_CURL_MULTI
1798 is_running_queue = 0;
1799 #endif
1800
1801 /* Verify DAV compliance/lock support */
1802 if (!locking_available()) {
1803 rc = 1;
1804 goto cleanup;
1805 }
1806
1807 sigchain_push_common(remove_locks_on_signal);
1808
1809 /* Check whether the remote has server info files */
1810 repo->can_update_info_refs = 0;
1811 repo->has_info_refs = remote_exists("info/refs");
1812 repo->has_info_packs = remote_exists("objects/info/packs");
1813 if (repo->has_info_refs) {
1814 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
1815 if (info_ref_lock)
1816 repo->can_update_info_refs = 1;
1817 else {
1818 error("cannot lock existing info/refs");
1819 rc = 1;
1820 goto cleanup;
1821 }
1822 }
1823 if (repo->has_info_packs)
1824 fetch_indices();
1825
1826 /* Get a list of all local and remote heads to validate refspecs */
1827 local_refs = get_local_heads();
1828 fprintf(stderr, "Fetching remote heads...\n");
1829 get_dav_remote_heads();
1830 run_request_queue();
1831
1832 /* Remove a remote branch if -d or -D was specified */
1833 if (delete_branch) {
1834 if (delete_remote_branch(refspec[0], force_delete) == -1) {
1835 fprintf(stderr, "Unable to delete remote branch %s\n",
1836 refspec[0]);
1837 if (helper_status)
1838 printf("error %s cannot remove\n", refspec[0]);
1839 }
1840 goto cleanup;
1841 }
1842
1843 /* match them up */
1844 if (match_push_refs(local_refs, &remote_refs,
1845 nr_refspec, (const char **) refspec, push_all)) {
1846 rc = -1;
1847 goto cleanup;
1848 }
1849 if (!remote_refs) {
1850 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
1851 if (helper_status)
1852 printf("error null no match\n");
1853 rc = 0;
1854 goto cleanup;
1855 }
1856
1857 new_refs = 0;
1858 for (ref = remote_refs; ref; ref = ref->next) {
1859 char old_hex[60], *new_hex;
1860 const char *commit_argv[5];
1861 int commit_argc;
1862 char *new_sha1_hex, *old_sha1_hex;
1863
1864 if (!ref->peer_ref)
1865 continue;
1866
1867 if (is_null_sha1(ref->peer_ref->new_sha1)) {
1868 if (delete_remote_branch(ref->name, 1) == -1) {
1869 error("Could not remove %s", ref->name);
1870 if (helper_status)
1871 printf("error %s cannot remove\n", ref->name);
1872 rc = -4;
1873 }
1874 else if (helper_status)
1875 printf("ok %s\n", ref->name);
1876 new_refs++;
1877 continue;
1878 }
1879
1880 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
1881 if (push_verbosely)
1882 fprintf(stderr, "'%s': up-to-date\n", ref->name);
1883 if (helper_status)
1884 printf("ok %s up to date\n", ref->name);
1885 continue;
1886 }
1887
1888 if (!force_all &&
1889 !is_null_sha1(ref->old_sha1) &&
1890 !ref->force) {
1891 if (!has_sha1_file(ref->old_sha1) ||
1892 !ref_newer(ref->peer_ref->new_sha1,
1893 ref->old_sha1)) {
1894 /*
1895 * We do not have the remote ref, or
1896 * we know that the remote ref is not
1897 * an ancestor of what we are trying to
1898 * push. Either way this can be losing
1899 * commits at the remote end and likely
1900 * we were not up to date to begin with.
1901 */
1902 error("remote '%s' is not an ancestor of\n"
1903 "local '%s'.\n"
1904 "Maybe you are not up-to-date and "
1905 "need to pull first?",
1906 ref->name,
1907 ref->peer_ref->name);
1908 if (helper_status)
1909 printf("error %s non-fast forward\n", ref->name);
1910 rc = -2;
1911 continue;
1912 }
1913 }
1914 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
1915 new_refs++;
1916 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
1917 new_hex = sha1_to_hex(ref->new_sha1);
1918
1919 fprintf(stderr, "updating '%s'", ref->name);
1920 if (strcmp(ref->name, ref->peer_ref->name))
1921 fprintf(stderr, " using '%s'", ref->peer_ref->name);
1922 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
1923 if (dry_run) {
1924 if (helper_status)
1925 printf("ok %s\n", ref->name);
1926 continue;
1927 }
1928
1929 /* Lock remote branch ref */
1930 ref_lock = lock_remote(ref->name, LOCK_TIME);
1931 if (ref_lock == NULL) {
1932 fprintf(stderr, "Unable to lock remote branch %s\n",
1933 ref->name);
1934 if (helper_status)
1935 printf("error %s lock error\n", ref->name);
1936 rc = 1;
1937 continue;
1938 }
1939
1940 /* Set up revision info for this refspec */
1941 commit_argc = 3;
1942 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
1943 old_sha1_hex = NULL;
1944 commit_argv[1] = "--objects";
1945 commit_argv[2] = new_sha1_hex;
1946 if (!push_all && !is_null_sha1(ref->old_sha1)) {
1947 old_sha1_hex = xmalloc(42);
1948 sprintf(old_sha1_hex, "^%s",
1949 sha1_to_hex(ref->old_sha1));
1950 commit_argv[3] = old_sha1_hex;
1951 commit_argc++;
1952 }
1953 commit_argv[commit_argc] = NULL;
1954 init_revisions(&revs, setup_git_directory());
1955 setup_revisions(commit_argc, commit_argv, &revs, NULL);
1956 revs.edge_hint = 0; /* just in case */
1957 free(new_sha1_hex);
1958 if (old_sha1_hex) {
1959 free(old_sha1_hex);
1960 commit_argv[1] = NULL;
1961 }
1962
1963 /* Generate a list of objects that need to be pushed */
1964 pushing = 0;
1965 if (prepare_revision_walk(&revs))
1966 die("revision walk setup failed");
1967 mark_edges_uninteresting(&revs, NULL);
1968 objects_to_send = get_delta(&revs, ref_lock);
1969 finish_all_active_slots();
1970
1971 /* Push missing objects to remote, this would be a
1972 convenient time to pack them first if appropriate. */
1973 pushing = 1;
1974 if (objects_to_send)
1975 fprintf(stderr, " sending %d objects\n",
1976 objects_to_send);
1977
1978 run_request_queue();
1979
1980 /* Update the remote branch if all went well */
1981 if (aborted || !update_remote(ref->new_sha1, ref_lock))
1982 rc = 1;
1983
1984 if (!rc)
1985 fprintf(stderr, " done\n");
1986 if (helper_status)
1987 printf("%s %s\n", !rc ? "ok" : "error", ref->name);
1988 unlock_remote(ref_lock);
1989 check_locks();
1990 }
1991
1992 /* Update remote server info if appropriate */
1993 if (repo->has_info_refs && new_refs) {
1994 if (info_ref_lock && repo->can_update_info_refs) {
1995 fprintf(stderr, "Updating remote server info\n");
1996 if (!dry_run)
1997 update_remote_info_refs(info_ref_lock);
1998 } else {
1999 fprintf(stderr, "Unable to update server info\n");
2000 }
2001 }
2002
2003 cleanup:
2004 if (info_ref_lock)
2005 unlock_remote(info_ref_lock);
2006 free(repo);
2007
2008 http_cleanup();
2009
2010 request = request_queue_head;
2011 while (request != NULL) {
2012 next_request = request->next;
2013 release_request(request);
2014 request = next_request;
2015 }
2016
2017 return rc;
2018 }
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