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daemon: use skip_prefix to avoid magic numbers
[git.git] / http-push.c
blob26dfa6724e03c540aae8107b9ee65fff647f0966
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 = xmalloc(strlen(ctx->cdata) + 1);
771 strcpy(lock->owner, ctx->cdata);
772 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
773 const char *arg;
774 if (skip_prefix(ctx->cdata, "Second-", &arg))
775 lock->timeout = strtol(arg, NULL, 10);
776 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
777 lock->token = xmalloc(strlen(ctx->cdata) + 1);
778 strcpy(lock->token, ctx->cdata);
779
780 git_SHA1_Init(&sha_ctx);
781 git_SHA1_Update(&sha_ctx, lock->token, strlen(lock->token));
782 git_SHA1_Final(lock_token_sha1, &sha_ctx);
783
784 lock->tmpfile_suffix[0] = '_';
785 memcpy(lock->tmpfile_suffix + 1, sha1_to_hex(lock_token_sha1), 40);
786 }
787 }
788 }
789
790 static void one_remote_ref(const char *refname);
791
792 static void
793 xml_start_tag(void *userData, const char *name, const char **atts)
794 {
795 struct xml_ctx *ctx = (struct xml_ctx *)userData;
796 const char *c = strchr(name, ':');
797 int new_len;
798
799 if (c == NULL)
800 c = name;
801 else
802 c++;
803
804 new_len = strlen(ctx->name) + strlen(c) + 2;
805
806 if (new_len > ctx->len) {
807 ctx->name = xrealloc(ctx->name, new_len);
808 ctx->len = new_len;
809 }
810 strcat(ctx->name, ".");
811 strcat(ctx->name, c);
812
813 free(ctx->cdata);
814 ctx->cdata = NULL;
815
816 ctx->userFunc(ctx, 0);
817 }
818
819 static void
820 xml_end_tag(void *userData, const char *name)
821 {
822 struct xml_ctx *ctx = (struct xml_ctx *)userData;
823 const char *c = strchr(name, ':');
824 char *ep;
825
826 ctx->userFunc(ctx, 1);
827
828 if (c == NULL)
829 c = name;
830 else
831 c++;
832
833 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
834 *ep = 0;
835 }
836
837 static void
838 xml_cdata(void *userData, const XML_Char *s, int len)
839 {
840 struct xml_ctx *ctx = (struct xml_ctx *)userData;
841 free(ctx->cdata);
842 ctx->cdata = xmemdupz(s, len);
843 }
844
845 static struct remote_lock *lock_remote(const char *path, long timeout)
846 {
847 struct active_request_slot *slot;
848 struct slot_results results;
849 struct buffer out_buffer = { STRBUF_INIT, 0 };
850 struct strbuf in_buffer = STRBUF_INIT;
851 char *url;
852 char *ep;
853 char timeout_header[25];
854 struct remote_lock *lock = NULL;
855 struct curl_slist *dav_headers = NULL;
856 struct xml_ctx ctx;
857 char *escaped;
858
859 url = xmalloc(strlen(repo->url) + strlen(path) + 1);
860 sprintf(url, "%s%s", repo->url, path);
861
862 /* Make sure leading directories exist for the remote ref */
863 ep = strchr(url + strlen(repo->url) + 1, '/');
864 while (ep) {
865 char saved_character = ep[1];
866 ep[1] = '\0';
867 slot = get_active_slot();
868 slot->results = &results;
869 curl_setup_http_get(slot->curl, url, DAV_MKCOL);
870 if (start_active_slot(slot)) {
871 run_active_slot(slot);
872 if (results.curl_result != CURLE_OK &&
873 results.http_code != 405) {
874 fprintf(stderr,
875 "Unable to create branch path %s\n",
876 url);
877 free(url);
878 return NULL;
879 }
880 } else {
881 fprintf(stderr, "Unable to start MKCOL request\n");
882 free(url);
883 return NULL;
884 }
885 ep[1] = saved_character;
886 ep = strchr(ep + 1, '/');
887 }
888
889 escaped = xml_entities(ident_default_email());
890 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
891 free(escaped);
892
893 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
894 dav_headers = curl_slist_append(dav_headers, timeout_header);
895 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
896
897 slot = get_active_slot();
898 slot->results = &results;
899 curl_setup_http(slot->curl, url, DAV_LOCK, &out_buffer, fwrite_buffer);
900 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
901 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
902
903 lock = xcalloc(1, sizeof(*lock));
904 lock->timeout = -1;
905
906 if (start_active_slot(slot)) {
907 run_active_slot(slot);
908 if (results.curl_result == CURLE_OK) {
909 XML_Parser parser = XML_ParserCreate(NULL);
910 enum XML_Status result;
911 ctx.name = xcalloc(10, 1);
912 ctx.len = 0;
913 ctx.cdata = NULL;
914 ctx.userFunc = handle_new_lock_ctx;
915 ctx.userData = lock;
916 XML_SetUserData(parser, &ctx);
917 XML_SetElementHandler(parser, xml_start_tag,
918 xml_end_tag);
919 XML_SetCharacterDataHandler(parser, xml_cdata);
920 result = XML_Parse(parser, in_buffer.buf,
921 in_buffer.len, 1);
922 free(ctx.name);
923 if (result != XML_STATUS_OK) {
924 fprintf(stderr, "XML error: %s\n",
925 XML_ErrorString(
926 XML_GetErrorCode(parser)));
927 lock->timeout = -1;
928 }
929 XML_ParserFree(parser);
930 }
931 } else {
932 fprintf(stderr, "Unable to start LOCK request\n");
933 }
934
935 curl_slist_free_all(dav_headers);
936 strbuf_release(&out_buffer.buf);
937 strbuf_release(&in_buffer);
938
939 if (lock->token == NULL || lock->timeout <= 0) {
940 free(lock->token);
941 free(lock->owner);
942 free(url);
943 free(lock);
944 lock = NULL;
945 } else {
946 lock->url = url;
947 lock->start_time = time(NULL);
948 lock->next = repo->locks;
949 repo->locks = lock;
950 }
951
952 return lock;
953 }
954
955 static int unlock_remote(struct remote_lock *lock)
956 {
957 struct active_request_slot *slot;
958 struct slot_results results;
959 struct remote_lock *prev = repo->locks;
960 struct curl_slist *dav_headers;
961 int rc = 0;
962
963 dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
964
965 slot = get_active_slot();
966 slot->results = &results;
967 curl_setup_http_get(slot->curl, lock->url, DAV_UNLOCK);
968 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
969
970 if (start_active_slot(slot)) {
971 run_active_slot(slot);
972 if (results.curl_result == CURLE_OK)
973 rc = 1;
974 else
975 fprintf(stderr, "UNLOCK HTTP error %ld\n",
976 results.http_code);
977 } else {
978 fprintf(stderr, "Unable to start UNLOCK request\n");
979 }
980
981 curl_slist_free_all(dav_headers);
982
983 if (repo->locks == lock) {
984 repo->locks = lock->next;
985 } else {
986 while (prev && prev->next != lock)
987 prev = prev->next;
988 if (prev)
989 prev->next = prev->next->next;
990 }
991
992 free(lock->owner);
993 free(lock->url);
994 free(lock->token);
995 free(lock);
996
997 return rc;
998 }
999
1000 static void remove_locks(void)
1001 {
1002 struct remote_lock *lock = repo->locks;
1003
1004 fprintf(stderr, "Removing remote locks...\n");
1005 while (lock) {
1006 struct remote_lock *next = lock->next;
1007 unlock_remote(lock);
1008 lock = next;
1009 }
1010 }
1011
1012 static void remove_locks_on_signal(int signo)
1013 {
1014 remove_locks();
1015 sigchain_pop(signo);
1016 raise(signo);
1017 }
1018
1019 static void remote_ls(const char *path, int flags,
1020 void (*userFunc)(struct remote_ls_ctx *ls),
1021 void *userData);
1022
1023 static void process_ls_object(struct remote_ls_ctx *ls)
1024 {
1025 unsigned int *parent = (unsigned int *)ls->userData;
1026 char *path = ls->dentry_name;
1027 char *obj_hex;
1028
1029 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1030 remote_dir_exists[*parent] = 1;
1031 return;
1032 }
1033
1034 if (strlen(path) != 49)
1035 return;
1036 path += 8;
1037 obj_hex = xmalloc(strlen(path));
1038 /* NB: path is not null-terminated, can not use strlcpy here */
1039 memcpy(obj_hex, path, 2);
1040 strcpy(obj_hex + 2, path + 3);
1041 one_remote_object(obj_hex);
1042 free(obj_hex);
1043 }
1044
1045 static void process_ls_ref(struct remote_ls_ctx *ls)
1046 {
1047 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1048 fprintf(stderr, " %s\n", ls->dentry_name);
1049 return;
1050 }
1051
1052 if (!(ls->dentry_flags & IS_DIR))
1053 one_remote_ref(ls->dentry_name);
1054 }
1055
1056 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1057 {
1058 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1059
1060 if (tag_closed) {
1061 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1062 if (ls->dentry_flags & IS_DIR) {
1063
1064 /* ensure collection names end with slash */
1065 str_end_url_with_slash(ls->dentry_name, &ls->dentry_name);
1066
1067 if (ls->flags & PROCESS_DIRS) {
1068 ls->userFunc(ls);
1069 }
1070 if (strcmp(ls->dentry_name, ls->path) &&
1071 ls->flags & RECURSIVE) {
1072 remote_ls(ls->dentry_name,
1073 ls->flags,
1074 ls->userFunc,
1075 ls->userData);
1076 }
1077 } else if (ls->flags & PROCESS_FILES) {
1078 ls->userFunc(ls);
1079 }
1080 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1081 char *path = ctx->cdata;
1082 if (*ctx->cdata == 'h') {
1083 path = strstr(path, "//");
1084 if (path) {
1085 path = strchr(path+2, '/');
1086 }
1087 }
1088 if (path) {
1089 const char *url = repo->url;
1090 if (repo->path)
1091 url = repo->path;
1092 if (strncmp(path, url, repo->path_len))
1093 error("Parsed path '%s' does not match url: '%s'",
1094 path, url);
1095 else {
1096 path += repo->path_len;
1097 ls->dentry_name = xstrdup(path);
1098 }
1099 }
1100 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1101 ls->dentry_flags |= IS_DIR;
1102 }
1103 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1104 free(ls->dentry_name);
1105 ls->dentry_name = NULL;
1106 ls->dentry_flags = 0;
1107 }
1108 }
1109
1110 /*
1111 * NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it
1112 * should _only_ heed the information from that file, instead of trying to
1113 * determine the refs from the remote file system (badly: it does not even
1114 * know about packed-refs).
1115 */
1116 static void remote_ls(const char *path, int flags,
1117 void (*userFunc)(struct remote_ls_ctx *ls),
1118 void *userData)
1119 {
1120 char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1121 struct active_request_slot *slot;
1122 struct slot_results results;
1123 struct strbuf in_buffer = STRBUF_INIT;
1124 struct buffer out_buffer = { STRBUF_INIT, 0 };
1125 struct curl_slist *dav_headers = NULL;
1126 struct xml_ctx ctx;
1127 struct remote_ls_ctx ls;
1128
1129 ls.flags = flags;
1130 ls.path = xstrdup(path);
1131 ls.dentry_name = NULL;
1132 ls.dentry_flags = 0;
1133 ls.userData = userData;
1134 ls.userFunc = userFunc;
1135
1136 sprintf(url, "%s%s", repo->url, path);
1137
1138 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1139
1140 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1141 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1142
1143 slot = get_active_slot();
1144 slot->results = &results;
1145 curl_setup_http(slot->curl, url, DAV_PROPFIND,
1146 &out_buffer, fwrite_buffer);
1147 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1148 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1149
1150 if (start_active_slot(slot)) {
1151 run_active_slot(slot);
1152 if (results.curl_result == CURLE_OK) {
1153 XML_Parser parser = XML_ParserCreate(NULL);
1154 enum XML_Status result;
1155 ctx.name = xcalloc(10, 1);
1156 ctx.len = 0;
1157 ctx.cdata = NULL;
1158 ctx.userFunc = handle_remote_ls_ctx;
1159 ctx.userData = &ls;
1160 XML_SetUserData(parser, &ctx);
1161 XML_SetElementHandler(parser, xml_start_tag,
1162 xml_end_tag);
1163 XML_SetCharacterDataHandler(parser, xml_cdata);
1164 result = XML_Parse(parser, in_buffer.buf,
1165 in_buffer.len, 1);
1166 free(ctx.name);
1167
1168 if (result != XML_STATUS_OK) {
1169 fprintf(stderr, "XML error: %s\n",
1170 XML_ErrorString(
1171 XML_GetErrorCode(parser)));
1172 }
1173 XML_ParserFree(parser);
1174 }
1175 } else {
1176 fprintf(stderr, "Unable to start PROPFIND request\n");
1177 }
1178
1179 free(ls.path);
1180 free(url);
1181 strbuf_release(&out_buffer.buf);
1182 strbuf_release(&in_buffer);
1183 curl_slist_free_all(dav_headers);
1184 }
1185
1186 static void get_remote_object_list(unsigned char parent)
1187 {
1188 char path[] = "objects/XX/";
1189 static const char hex[] = "0123456789abcdef";
1190 unsigned int val = parent;
1191
1192 path[8] = hex[val >> 4];
1193 path[9] = hex[val & 0xf];
1194 remote_dir_exists[val] = 0;
1195 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1196 process_ls_object, &val);
1197 }
1198
1199 static int locking_available(void)
1200 {
1201 struct active_request_slot *slot;
1202 struct slot_results results;
1203 struct strbuf in_buffer = STRBUF_INIT;
1204 struct buffer out_buffer = { STRBUF_INIT, 0 };
1205 struct curl_slist *dav_headers = NULL;
1206 struct xml_ctx ctx;
1207 int lock_flags = 0;
1208 char *escaped;
1209
1210 escaped = xml_entities(repo->url);
1211 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
1212 free(escaped);
1213
1214 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1215 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1216
1217 slot = get_active_slot();
1218 slot->results = &results;
1219 curl_setup_http(slot->curl, repo->url, DAV_PROPFIND,
1220 &out_buffer, fwrite_buffer);
1221 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1222 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1223
1224 if (start_active_slot(slot)) {
1225 run_active_slot(slot);
1226 if (results.curl_result == CURLE_OK) {
1227 XML_Parser parser = XML_ParserCreate(NULL);
1228 enum XML_Status result;
1229 ctx.name = xcalloc(10, 1);
1230 ctx.len = 0;
1231 ctx.cdata = NULL;
1232 ctx.userFunc = handle_lockprop_ctx;
1233 ctx.userData = &lock_flags;
1234 XML_SetUserData(parser, &ctx);
1235 XML_SetElementHandler(parser, xml_start_tag,
1236 xml_end_tag);
1237 result = XML_Parse(parser, in_buffer.buf,
1238 in_buffer.len, 1);
1239 free(ctx.name);
1240
1241 if (result != XML_STATUS_OK) {
1242 fprintf(stderr, "XML error: %s\n",
1243 XML_ErrorString(
1244 XML_GetErrorCode(parser)));
1245 lock_flags = 0;
1246 }
1247 XML_ParserFree(parser);
1248 if (!lock_flags)
1249 error("no DAV locking support on %s",
1250 repo->url);
1251
1252 } else {
1253 error("Cannot access URL %s, return code %d",
1254 repo->url, results.curl_result);
1255 lock_flags = 0;
1256 }
1257 } else {
1258 error("Unable to start PROPFIND request on %s", repo->url);
1259 }
1260
1261 strbuf_release(&out_buffer.buf);
1262 strbuf_release(&in_buffer);
1263 curl_slist_free_all(dav_headers);
1264
1265 return lock_flags;
1266 }
1267
1268 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1269 {
1270 struct object_list *entry = xmalloc(sizeof(struct object_list));
1271 entry->item = obj;
1272 entry->next = *p;
1273 *p = entry;
1274 return &entry->next;
1275 }
1276
1277 static struct object_list **process_blob(struct blob *blob,
1278 struct object_list **p,
1279 struct name_path *path,
1280 const char *name)
1281 {
1282 struct object *obj = &blob->object;
1283
1284 obj->flags |= LOCAL;
1285
1286 if (obj->flags & (UNINTERESTING | SEEN))
1287 return p;
1288
1289 obj->flags |= SEEN;
1290 return add_one_object(obj, p);
1291 }
1292
1293 static struct object_list **process_tree(struct tree *tree,
1294 struct object_list **p,
1295 struct name_path *path,
1296 const char *name)
1297 {
1298 struct object *obj = &tree->object;
1299 struct tree_desc desc;
1300 struct name_entry entry;
1301 struct name_path me;
1302
1303 obj->flags |= LOCAL;
1304
1305 if (obj->flags & (UNINTERESTING | SEEN))
1306 return p;
1307 if (parse_tree(tree) < 0)
1308 die("bad tree object %s", sha1_to_hex(obj->sha1));
1309
1310 obj->flags |= SEEN;
1311 name = xstrdup(name);
1312 p = add_one_object(obj, p);
1313 me.up = path;
1314 me.elem = name;
1315 me.elem_len = strlen(name);
1316
1317 init_tree_desc(&desc, tree->buffer, tree->size);
1318
1319 while (tree_entry(&desc, &entry))
1320 switch (object_type(entry.mode)) {
1321 case OBJ_TREE:
1322 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1323 break;
1324 case OBJ_BLOB:
1325 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1326 break;
1327 default:
1328 /* Subproject commit - not in this repository */
1329 break;
1330 }
1331
1332 free_tree_buffer(tree);
1333 return p;
1334 }
1335
1336 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1337 {
1338 int i;
1339 struct commit *commit;
1340 struct object_list **p = &objects;
1341 int count = 0;
1342
1343 while ((commit = get_revision(revs)) != NULL) {
1344 p = process_tree(commit->tree, p, NULL, "");
1345 commit->object.flags |= LOCAL;
1346 if (!(commit->object.flags & UNINTERESTING))
1347 count += add_send_request(&commit->object, lock);
1348 }
1349
1350 for (i = 0; i < revs->pending.nr; i++) {
1351 struct object_array_entry *entry = revs->pending.objects + i;
1352 struct object *obj = entry->item;
1353 const char *name = entry->name;
1354
1355 if (obj->flags & (UNINTERESTING | SEEN))
1356 continue;
1357 if (obj->type == OBJ_TAG) {
1358 obj->flags |= SEEN;
1359 p = add_one_object(obj, p);
1360 continue;
1361 }
1362 if (obj->type == OBJ_TREE) {
1363 p = process_tree((struct tree *)obj, p, NULL, name);
1364 continue;
1365 }
1366 if (obj->type == OBJ_BLOB) {
1367 p = process_blob((struct blob *)obj, p, NULL, name);
1368 continue;
1369 }
1370 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1371 }
1372
1373 while (objects) {
1374 if (!(objects->item->flags & UNINTERESTING))
1375 count += add_send_request(objects->item, lock);
1376 objects = objects->next;
1377 }
1378
1379 return count;
1380 }
1381
1382 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1383 {
1384 struct active_request_slot *slot;
1385 struct slot_results results;
1386 struct buffer out_buffer = { STRBUF_INIT, 0 };
1387 struct curl_slist *dav_headers;
1388
1389 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1390
1391 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1392
1393 slot = get_active_slot();
1394 slot->results = &results;
1395 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1396 &out_buffer, fwrite_null);
1397 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1398
1399 if (start_active_slot(slot)) {
1400 run_active_slot(slot);
1401 strbuf_release(&out_buffer.buf);
1402 if (results.curl_result != CURLE_OK) {
1403 fprintf(stderr,
1404 "PUT error: curl result=%d, HTTP code=%ld\n",
1405 results.curl_result, results.http_code);
1406 /* We should attempt recovery? */
1407 return 0;
1408 }
1409 } else {
1410 strbuf_release(&out_buffer.buf);
1411 fprintf(stderr, "Unable to start PUT request\n");
1412 return 0;
1413 }
1414
1415 return 1;
1416 }
1417
1418 static struct ref *remote_refs;
1419
1420 static void one_remote_ref(const char *refname)
1421 {
1422 struct ref *ref;
1423 struct object *obj;
1424
1425 ref = alloc_ref(refname);
1426
1427 if (http_fetch_ref(repo->url, ref) != 0) {
1428 fprintf(stderr,
1429 "Unable to fetch ref %s from %s\n",
1430 refname, repo->url);
1431 free(ref);
1432 return;
1433 }
1434
1435 /*
1436 * Fetch a copy of the object if it doesn't exist locally - it
1437 * may be required for updating server info later.
1438 */
1439 if (repo->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
1440 obj = lookup_unknown_object(ref->old_sha1);
1441 if (obj) {
1442 fprintf(stderr, " fetch %s for %s\n",
1443 sha1_to_hex(ref->old_sha1), refname);
1444 add_fetch_request(obj);
1445 }
1446 }
1447
1448 ref->next = remote_refs;
1449 remote_refs = ref;
1450 }
1451
1452 static void get_dav_remote_heads(void)
1453 {
1454 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1455 }
1456
1457 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1458 {
1459 struct strbuf *buf = (struct strbuf *)ls->userData;
1460 struct object *o;
1461 int len;
1462 char *ref_info;
1463 struct ref *ref;
1464
1465 ref = alloc_ref(ls->dentry_name);
1466
1467 if (http_fetch_ref(repo->url, ref) != 0) {
1468 fprintf(stderr,
1469 "Unable to fetch ref %s from %s\n",
1470 ls->dentry_name, repo->url);
1471 aborted = 1;
1472 free(ref);
1473 return;
1474 }
1475
1476 o = parse_object(ref->old_sha1);
1477 if (!o) {
1478 fprintf(stderr,
1479 "Unable to parse object %s for remote ref %s\n",
1480 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1481 aborted = 1;
1482 free(ref);
1483 return;
1484 }
1485
1486 len = strlen(ls->dentry_name) + 42;
1487 ref_info = xcalloc(len + 1, 1);
1488 sprintf(ref_info, "%s %s\n",
1489 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1490 fwrite_buffer(ref_info, 1, len, buf);
1491 free(ref_info);
1492
1493 if (o->type == OBJ_TAG) {
1494 o = deref_tag(o, ls->dentry_name, 0);
1495 if (o) {
1496 len = strlen(ls->dentry_name) + 45;
1497 ref_info = xcalloc(len + 1, 1);
1498 sprintf(ref_info, "%s %s^{}\n",
1499 sha1_to_hex(o->sha1), ls->dentry_name);
1500 fwrite_buffer(ref_info, 1, len, buf);
1501 free(ref_info);
1502 }
1503 }
1504 free(ref);
1505 }
1506
1507 static void update_remote_info_refs(struct remote_lock *lock)
1508 {
1509 struct buffer buffer = { STRBUF_INIT, 0 };
1510 struct active_request_slot *slot;
1511 struct slot_results results;
1512 struct curl_slist *dav_headers;
1513
1514 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1515 add_remote_info_ref, &buffer.buf);
1516 if (!aborted) {
1517 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1518
1519 slot = get_active_slot();
1520 slot->results = &results;
1521 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1522 &buffer, fwrite_null);
1523 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1524
1525 if (start_active_slot(slot)) {
1526 run_active_slot(slot);
1527 if (results.curl_result != CURLE_OK) {
1528 fprintf(stderr,
1529 "PUT error: curl result=%d, HTTP code=%ld\n",
1530 results.curl_result, results.http_code);
1531 }
1532 }
1533 }
1534 strbuf_release(&buffer.buf);
1535 }
1536
1537 static int remote_exists(const char *path)
1538 {
1539 char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1540 int ret;
1541
1542 sprintf(url, "%s%s", repo->url, path);
1543
1544 switch (http_get_strbuf(url, NULL, NULL)) {
1545 case HTTP_OK:
1546 ret = 1;
1547 break;
1548 case HTTP_MISSING_TARGET:
1549 ret = 0;
1550 break;
1551 case HTTP_ERROR:
1552 error("unable to access '%s': %s", url, curl_errorstr);
1553 default:
1554 ret = -1;
1555 }
1556 free(url);
1557 return ret;
1558 }
1559
1560 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
1561 {
1562 char *url;
1563 struct strbuf buffer = STRBUF_INIT;
1564 const char *name;
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 (skip_prefix(buffer.buf, "ref: ", &name)) {
1583 *symref = xmemdupz(name, buffer.len - (name - buffer.buf));
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(1, sizeof(*repo));
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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