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tag: support configuring --sort via .gitconfig
[git.git] / http-push.c
blobc5c95e85ea305540b7863512617adca35b858534
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 unsigned char *sha1)
723 {
724 struct object *obj;
725
726 obj = lookup_object(sha1);
727 if (!obj)
728 obj = parse_object(sha1);
729
730 /* Ignore remote objects that don't exist locally */
731 if (!obj)
732 return;
733
734 obj->flags |= REMOTE;
735 if (!object_list_contains(objects, obj))
736 object_list_insert(obj, &objects);
737 }
738
739 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
740 {
741 int *lock_flags = (int *)ctx->userData;
742
743 if (tag_closed) {
744 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
745 if ((*lock_flags & DAV_PROP_LOCKEX) &&
746 (*lock_flags & DAV_PROP_LOCKWR)) {
747 *lock_flags |= DAV_LOCK_OK;
748 }
749 *lock_flags &= DAV_LOCK_OK;
750 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
751 *lock_flags |= DAV_PROP_LOCKWR;
752 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
753 *lock_flags |= DAV_PROP_LOCKEX;
754 }
755 }
756 }
757
758 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
759 {
760 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
761 git_SHA_CTX sha_ctx;
762 unsigned char lock_token_sha1[20];
763
764 if (tag_closed && ctx->cdata) {
765 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
766 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
767 strcpy(lock->owner, ctx->cdata);
768 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
769 const char *arg;
770 if (skip_prefix(ctx->cdata, "Second-", &arg))
771 lock->timeout = strtol(arg, NULL, 10);
772 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
773 lock->token = xmalloc(strlen(ctx->cdata) + 1);
774 strcpy(lock->token, ctx->cdata);
775
776 git_SHA1_Init(&sha_ctx);
777 git_SHA1_Update(&sha_ctx, lock->token, strlen(lock->token));
778 git_SHA1_Final(lock_token_sha1, &sha_ctx);
779
780 lock->tmpfile_suffix[0] = '_';
781 memcpy(lock->tmpfile_suffix + 1, sha1_to_hex(lock_token_sha1), 40);
782 }
783 }
784 }
785
786 static void one_remote_ref(const char *refname);
787
788 static void
789 xml_start_tag(void *userData, const char *name, const char **atts)
790 {
791 struct xml_ctx *ctx = (struct xml_ctx *)userData;
792 const char *c = strchr(name, ':');
793 int new_len;
794
795 if (c == NULL)
796 c = name;
797 else
798 c++;
799
800 new_len = strlen(ctx->name) + strlen(c) + 2;
801
802 if (new_len > ctx->len) {
803 ctx->name = xrealloc(ctx->name, new_len);
804 ctx->len = new_len;
805 }
806 strcat(ctx->name, ".");
807 strcat(ctx->name, c);
808
809 free(ctx->cdata);
810 ctx->cdata = NULL;
811
812 ctx->userFunc(ctx, 0);
813 }
814
815 static void
816 xml_end_tag(void *userData, const char *name)
817 {
818 struct xml_ctx *ctx = (struct xml_ctx *)userData;
819 const char *c = strchr(name, ':');
820 char *ep;
821
822 ctx->userFunc(ctx, 1);
823
824 if (c == NULL)
825 c = name;
826 else
827 c++;
828
829 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
830 *ep = 0;
831 }
832
833 static void
834 xml_cdata(void *userData, const XML_Char *s, int len)
835 {
836 struct xml_ctx *ctx = (struct xml_ctx *)userData;
837 free(ctx->cdata);
838 ctx->cdata = xmemdupz(s, len);
839 }
840
841 static struct remote_lock *lock_remote(const char *path, long timeout)
842 {
843 struct active_request_slot *slot;
844 struct slot_results results;
845 struct buffer out_buffer = { STRBUF_INIT, 0 };
846 struct strbuf in_buffer = STRBUF_INIT;
847 char *url;
848 char *ep;
849 char timeout_header[25];
850 struct remote_lock *lock = NULL;
851 struct curl_slist *dav_headers = NULL;
852 struct xml_ctx ctx;
853 char *escaped;
854
855 url = xmalloc(strlen(repo->url) + strlen(path) + 1);
856 sprintf(url, "%s%s", repo->url, path);
857
858 /* Make sure leading directories exist for the remote ref */
859 ep = strchr(url + strlen(repo->url) + 1, '/');
860 while (ep) {
861 char saved_character = ep[1];
862 ep[1] = '\0';
863 slot = get_active_slot();
864 slot->results = &results;
865 curl_setup_http_get(slot->curl, url, DAV_MKCOL);
866 if (start_active_slot(slot)) {
867 run_active_slot(slot);
868 if (results.curl_result != CURLE_OK &&
869 results.http_code != 405) {
870 fprintf(stderr,
871 "Unable to create branch path %s\n",
872 url);
873 free(url);
874 return NULL;
875 }
876 } else {
877 fprintf(stderr, "Unable to start MKCOL request\n");
878 free(url);
879 return NULL;
880 }
881 ep[1] = saved_character;
882 ep = strchr(ep + 1, '/');
883 }
884
885 escaped = xml_entities(ident_default_email());
886 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
887 free(escaped);
888
889 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
890 dav_headers = curl_slist_append(dav_headers, timeout_header);
891 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
892
893 slot = get_active_slot();
894 slot->results = &results;
895 curl_setup_http(slot->curl, url, DAV_LOCK, &out_buffer, fwrite_buffer);
896 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
897 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
898
899 lock = xcalloc(1, sizeof(*lock));
900 lock->timeout = -1;
901
902 if (start_active_slot(slot)) {
903 run_active_slot(slot);
904 if (results.curl_result == CURLE_OK) {
905 XML_Parser parser = XML_ParserCreate(NULL);
906 enum XML_Status result;
907 ctx.name = xcalloc(10, 1);
908 ctx.len = 0;
909 ctx.cdata = NULL;
910 ctx.userFunc = handle_new_lock_ctx;
911 ctx.userData = lock;
912 XML_SetUserData(parser, &ctx);
913 XML_SetElementHandler(parser, xml_start_tag,
914 xml_end_tag);
915 XML_SetCharacterDataHandler(parser, xml_cdata);
916 result = XML_Parse(parser, in_buffer.buf,
917 in_buffer.len, 1);
918 free(ctx.name);
919 if (result != XML_STATUS_OK) {
920 fprintf(stderr, "XML error: %s\n",
921 XML_ErrorString(
922 XML_GetErrorCode(parser)));
923 lock->timeout = -1;
924 }
925 XML_ParserFree(parser);
926 }
927 } else {
928 fprintf(stderr, "Unable to start LOCK request\n");
929 }
930
931 curl_slist_free_all(dav_headers);
932 strbuf_release(&out_buffer.buf);
933 strbuf_release(&in_buffer);
934
935 if (lock->token == NULL || lock->timeout <= 0) {
936 free(lock->token);
937 free(lock->owner);
938 free(url);
939 free(lock);
940 lock = NULL;
941 } else {
942 lock->url = url;
943 lock->start_time = time(NULL);
944 lock->next = repo->locks;
945 repo->locks = lock;
946 }
947
948 return lock;
949 }
950
951 static int unlock_remote(struct remote_lock *lock)
952 {
953 struct active_request_slot *slot;
954 struct slot_results results;
955 struct remote_lock *prev = repo->locks;
956 struct curl_slist *dav_headers;
957 int rc = 0;
958
959 dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
960
961 slot = get_active_slot();
962 slot->results = &results;
963 curl_setup_http_get(slot->curl, lock->url, DAV_UNLOCK);
964 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
965
966 if (start_active_slot(slot)) {
967 run_active_slot(slot);
968 if (results.curl_result == CURLE_OK)
969 rc = 1;
970 else
971 fprintf(stderr, "UNLOCK HTTP error %ld\n",
972 results.http_code);
973 } else {
974 fprintf(stderr, "Unable to start UNLOCK request\n");
975 }
976
977 curl_slist_free_all(dav_headers);
978
979 if (repo->locks == lock) {
980 repo->locks = lock->next;
981 } else {
982 while (prev && prev->next != lock)
983 prev = prev->next;
984 if (prev)
985 prev->next = prev->next->next;
986 }
987
988 free(lock->owner);
989 free(lock->url);
990 free(lock->token);
991 free(lock);
992
993 return rc;
994 }
995
996 static void remove_locks(void)
997 {
998 struct remote_lock *lock = repo->locks;
999
1000 fprintf(stderr, "Removing remote locks...\n");
1001 while (lock) {
1002 struct remote_lock *next = lock->next;
1003 unlock_remote(lock);
1004 lock = next;
1005 }
1006 }
1007
1008 static void remove_locks_on_signal(int signo)
1009 {
1010 remove_locks();
1011 sigchain_pop(signo);
1012 raise(signo);
1013 }
1014
1015 static void remote_ls(const char *path, int flags,
1016 void (*userFunc)(struct remote_ls_ctx *ls),
1017 void *userData);
1018
1019 /* extract hex from sharded "xx/x{40}" filename */
1020 static int get_sha1_hex_from_objpath(const char *path, unsigned char *sha1)
1021 {
1022 char hex[40];
1023
1024 if (strlen(path) != 41)
1025 return -1;
1026
1027 memcpy(hex, path, 2);
1028 path += 2;
1029 path++; /* skip '/' */
1030 memcpy(hex, path, 38);
1031
1032 return get_sha1_hex(hex, sha1);
1033 }
1034
1035 static void process_ls_object(struct remote_ls_ctx *ls)
1036 {
1037 unsigned int *parent = (unsigned int *)ls->userData;
1038 const char *path = ls->dentry_name;
1039 unsigned char sha1[20];
1040
1041 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1042 remote_dir_exists[*parent] = 1;
1043 return;
1044 }
1045
1046 if (!skip_prefix(path, "objects/", &path) ||
1047 get_sha1_hex_from_objpath(path, sha1))
1048 return;
1049
1050 one_remote_object(sha1);
1051 }
1052
1053 static void process_ls_ref(struct remote_ls_ctx *ls)
1054 {
1055 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1056 fprintf(stderr, " %s\n", ls->dentry_name);
1057 return;
1058 }
1059
1060 if (!(ls->dentry_flags & IS_DIR))
1061 one_remote_ref(ls->dentry_name);
1062 }
1063
1064 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1065 {
1066 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1067
1068 if (tag_closed) {
1069 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1070 if (ls->dentry_flags & IS_DIR) {
1071
1072 /* ensure collection names end with slash */
1073 str_end_url_with_slash(ls->dentry_name, &ls->dentry_name);
1074
1075 if (ls->flags & PROCESS_DIRS) {
1076 ls->userFunc(ls);
1077 }
1078 if (strcmp(ls->dentry_name, ls->path) &&
1079 ls->flags & RECURSIVE) {
1080 remote_ls(ls->dentry_name,
1081 ls->flags,
1082 ls->userFunc,
1083 ls->userData);
1084 }
1085 } else if (ls->flags & PROCESS_FILES) {
1086 ls->userFunc(ls);
1087 }
1088 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1089 char *path = ctx->cdata;
1090 if (*ctx->cdata == 'h') {
1091 path = strstr(path, "//");
1092 if (path) {
1093 path = strchr(path+2, '/');
1094 }
1095 }
1096 if (path) {
1097 const char *url = repo->url;
1098 if (repo->path)
1099 url = repo->path;
1100 if (strncmp(path, url, repo->path_len))
1101 error("Parsed path '%s' does not match url: '%s'",
1102 path, url);
1103 else {
1104 path += repo->path_len;
1105 ls->dentry_name = xstrdup(path);
1106 }
1107 }
1108 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1109 ls->dentry_flags |= IS_DIR;
1110 }
1111 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1112 free(ls->dentry_name);
1113 ls->dentry_name = NULL;
1114 ls->dentry_flags = 0;
1115 }
1116 }
1117
1118 /*
1119 * NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it
1120 * should _only_ heed the information from that file, instead of trying to
1121 * determine the refs from the remote file system (badly: it does not even
1122 * know about packed-refs).
1123 */
1124 static void remote_ls(const char *path, int flags,
1125 void (*userFunc)(struct remote_ls_ctx *ls),
1126 void *userData)
1127 {
1128 char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1129 struct active_request_slot *slot;
1130 struct slot_results results;
1131 struct strbuf in_buffer = STRBUF_INIT;
1132 struct buffer out_buffer = { STRBUF_INIT, 0 };
1133 struct curl_slist *dav_headers = NULL;
1134 struct xml_ctx ctx;
1135 struct remote_ls_ctx ls;
1136
1137 ls.flags = flags;
1138 ls.path = xstrdup(path);
1139 ls.dentry_name = NULL;
1140 ls.dentry_flags = 0;
1141 ls.userData = userData;
1142 ls.userFunc = userFunc;
1143
1144 sprintf(url, "%s%s", repo->url, path);
1145
1146 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1147
1148 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1149 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1150
1151 slot = get_active_slot();
1152 slot->results = &results;
1153 curl_setup_http(slot->curl, url, DAV_PROPFIND,
1154 &out_buffer, fwrite_buffer);
1155 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1156 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1157
1158 if (start_active_slot(slot)) {
1159 run_active_slot(slot);
1160 if (results.curl_result == CURLE_OK) {
1161 XML_Parser parser = XML_ParserCreate(NULL);
1162 enum XML_Status result;
1163 ctx.name = xcalloc(10, 1);
1164 ctx.len = 0;
1165 ctx.cdata = NULL;
1166 ctx.userFunc = handle_remote_ls_ctx;
1167 ctx.userData = &ls;
1168 XML_SetUserData(parser, &ctx);
1169 XML_SetElementHandler(parser, xml_start_tag,
1170 xml_end_tag);
1171 XML_SetCharacterDataHandler(parser, xml_cdata);
1172 result = XML_Parse(parser, in_buffer.buf,
1173 in_buffer.len, 1);
1174 free(ctx.name);
1175
1176 if (result != XML_STATUS_OK) {
1177 fprintf(stderr, "XML error: %s\n",
1178 XML_ErrorString(
1179 XML_GetErrorCode(parser)));
1180 }
1181 XML_ParserFree(parser);
1182 }
1183 } else {
1184 fprintf(stderr, "Unable to start PROPFIND request\n");
1185 }
1186
1187 free(ls.path);
1188 free(url);
1189 strbuf_release(&out_buffer.buf);
1190 strbuf_release(&in_buffer);
1191 curl_slist_free_all(dav_headers);
1192 }
1193
1194 static void get_remote_object_list(unsigned char parent)
1195 {
1196 char path[] = "objects/XX/";
1197 static const char hex[] = "0123456789abcdef";
1198 unsigned int val = parent;
1199
1200 path[8] = hex[val >> 4];
1201 path[9] = hex[val & 0xf];
1202 remote_dir_exists[val] = 0;
1203 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1204 process_ls_object, &val);
1205 }
1206
1207 static int locking_available(void)
1208 {
1209 struct active_request_slot *slot;
1210 struct slot_results results;
1211 struct strbuf in_buffer = STRBUF_INIT;
1212 struct buffer out_buffer = { STRBUF_INIT, 0 };
1213 struct curl_slist *dav_headers = NULL;
1214 struct xml_ctx ctx;
1215 int lock_flags = 0;
1216 char *escaped;
1217
1218 escaped = xml_entities(repo->url);
1219 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
1220 free(escaped);
1221
1222 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1223 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1224
1225 slot = get_active_slot();
1226 slot->results = &results;
1227 curl_setup_http(slot->curl, repo->url, DAV_PROPFIND,
1228 &out_buffer, fwrite_buffer);
1229 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1230 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1231
1232 if (start_active_slot(slot)) {
1233 run_active_slot(slot);
1234 if (results.curl_result == CURLE_OK) {
1235 XML_Parser parser = XML_ParserCreate(NULL);
1236 enum XML_Status result;
1237 ctx.name = xcalloc(10, 1);
1238 ctx.len = 0;
1239 ctx.cdata = NULL;
1240 ctx.userFunc = handle_lockprop_ctx;
1241 ctx.userData = &lock_flags;
1242 XML_SetUserData(parser, &ctx);
1243 XML_SetElementHandler(parser, xml_start_tag,
1244 xml_end_tag);
1245 result = XML_Parse(parser, in_buffer.buf,
1246 in_buffer.len, 1);
1247 free(ctx.name);
1248
1249 if (result != XML_STATUS_OK) {
1250 fprintf(stderr, "XML error: %s\n",
1251 XML_ErrorString(
1252 XML_GetErrorCode(parser)));
1253 lock_flags = 0;
1254 }
1255 XML_ParserFree(parser);
1256 if (!lock_flags)
1257 error("no DAV locking support on %s",
1258 repo->url);
1259
1260 } else {
1261 error("Cannot access URL %s, return code %d",
1262 repo->url, results.curl_result);
1263 lock_flags = 0;
1264 }
1265 } else {
1266 error("Unable to start PROPFIND request on %s", repo->url);
1267 }
1268
1269 strbuf_release(&out_buffer.buf);
1270 strbuf_release(&in_buffer);
1271 curl_slist_free_all(dav_headers);
1272
1273 return lock_flags;
1274 }
1275
1276 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1277 {
1278 struct object_list *entry = xmalloc(sizeof(struct object_list));
1279 entry->item = obj;
1280 entry->next = *p;
1281 *p = entry;
1282 return &entry->next;
1283 }
1284
1285 static struct object_list **process_blob(struct blob *blob,
1286 struct object_list **p,
1287 struct name_path *path,
1288 const char *name)
1289 {
1290 struct object *obj = &blob->object;
1291
1292 obj->flags |= LOCAL;
1293
1294 if (obj->flags & (UNINTERESTING | SEEN))
1295 return p;
1296
1297 obj->flags |= SEEN;
1298 return add_one_object(obj, p);
1299 }
1300
1301 static struct object_list **process_tree(struct tree *tree,
1302 struct object_list **p,
1303 struct name_path *path,
1304 const char *name)
1305 {
1306 struct object *obj = &tree->object;
1307 struct tree_desc desc;
1308 struct name_entry entry;
1309 struct name_path me;
1310
1311 obj->flags |= LOCAL;
1312
1313 if (obj->flags & (UNINTERESTING | SEEN))
1314 return p;
1315 if (parse_tree(tree) < 0)
1316 die("bad tree object %s", sha1_to_hex(obj->sha1));
1317
1318 obj->flags |= SEEN;
1319 name = xstrdup(name);
1320 p = add_one_object(obj, p);
1321 me.up = path;
1322 me.elem = name;
1323 me.elem_len = strlen(name);
1324
1325 init_tree_desc(&desc, tree->buffer, tree->size);
1326
1327 while (tree_entry(&desc, &entry))
1328 switch (object_type(entry.mode)) {
1329 case OBJ_TREE:
1330 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1331 break;
1332 case OBJ_BLOB:
1333 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1334 break;
1335 default:
1336 /* Subproject commit - not in this repository */
1337 break;
1338 }
1339
1340 free_tree_buffer(tree);
1341 return p;
1342 }
1343
1344 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1345 {
1346 int i;
1347 struct commit *commit;
1348 struct object_list **p = &objects;
1349 int count = 0;
1350
1351 while ((commit = get_revision(revs)) != NULL) {
1352 p = process_tree(commit->tree, p, NULL, "");
1353 commit->object.flags |= LOCAL;
1354 if (!(commit->object.flags & UNINTERESTING))
1355 count += add_send_request(&commit->object, lock);
1356 }
1357
1358 for (i = 0; i < revs->pending.nr; i++) {
1359 struct object_array_entry *entry = revs->pending.objects + i;
1360 struct object *obj = entry->item;
1361 const char *name = entry->name;
1362
1363 if (obj->flags & (UNINTERESTING | SEEN))
1364 continue;
1365 if (obj->type == OBJ_TAG) {
1366 obj->flags |= SEEN;
1367 p = add_one_object(obj, p);
1368 continue;
1369 }
1370 if (obj->type == OBJ_TREE) {
1371 p = process_tree((struct tree *)obj, p, NULL, name);
1372 continue;
1373 }
1374 if (obj->type == OBJ_BLOB) {
1375 p = process_blob((struct blob *)obj, p, NULL, name);
1376 continue;
1377 }
1378 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1379 }
1380
1381 while (objects) {
1382 if (!(objects->item->flags & UNINTERESTING))
1383 count += add_send_request(objects->item, lock);
1384 objects = objects->next;
1385 }
1386
1387 return count;
1388 }
1389
1390 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1391 {
1392 struct active_request_slot *slot;
1393 struct slot_results results;
1394 struct buffer out_buffer = { STRBUF_INIT, 0 };
1395 struct curl_slist *dav_headers;
1396
1397 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1398
1399 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1400
1401 slot = get_active_slot();
1402 slot->results = &results;
1403 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1404 &out_buffer, fwrite_null);
1405 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1406
1407 if (start_active_slot(slot)) {
1408 run_active_slot(slot);
1409 strbuf_release(&out_buffer.buf);
1410 if (results.curl_result != CURLE_OK) {
1411 fprintf(stderr,
1412 "PUT error: curl result=%d, HTTP code=%ld\n",
1413 results.curl_result, results.http_code);
1414 /* We should attempt recovery? */
1415 return 0;
1416 }
1417 } else {
1418 strbuf_release(&out_buffer.buf);
1419 fprintf(stderr, "Unable to start PUT request\n");
1420 return 0;
1421 }
1422
1423 return 1;
1424 }
1425
1426 static struct ref *remote_refs;
1427
1428 static void one_remote_ref(const char *refname)
1429 {
1430 struct ref *ref;
1431 struct object *obj;
1432
1433 ref = alloc_ref(refname);
1434
1435 if (http_fetch_ref(repo->url, ref) != 0) {
1436 fprintf(stderr,
1437 "Unable to fetch ref %s from %s\n",
1438 refname, repo->url);
1439 free(ref);
1440 return;
1441 }
1442
1443 /*
1444 * Fetch a copy of the object if it doesn't exist locally - it
1445 * may be required for updating server info later.
1446 */
1447 if (repo->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
1448 obj = lookup_unknown_object(ref->old_sha1);
1449 if (obj) {
1450 fprintf(stderr, " fetch %s for %s\n",
1451 sha1_to_hex(ref->old_sha1), refname);
1452 add_fetch_request(obj);
1453 }
1454 }
1455
1456 ref->next = remote_refs;
1457 remote_refs = ref;
1458 }
1459
1460 static void get_dav_remote_heads(void)
1461 {
1462 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1463 }
1464
1465 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1466 {
1467 struct strbuf *buf = (struct strbuf *)ls->userData;
1468 struct object *o;
1469 int len;
1470 char *ref_info;
1471 struct ref *ref;
1472
1473 ref = alloc_ref(ls->dentry_name);
1474
1475 if (http_fetch_ref(repo->url, ref) != 0) {
1476 fprintf(stderr,
1477 "Unable to fetch ref %s from %s\n",
1478 ls->dentry_name, repo->url);
1479 aborted = 1;
1480 free(ref);
1481 return;
1482 }
1483
1484 o = parse_object(ref->old_sha1);
1485 if (!o) {
1486 fprintf(stderr,
1487 "Unable to parse object %s for remote ref %s\n",
1488 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1489 aborted = 1;
1490 free(ref);
1491 return;
1492 }
1493
1494 len = strlen(ls->dentry_name) + 42;
1495 ref_info = xcalloc(len + 1, 1);
1496 sprintf(ref_info, "%s %s\n",
1497 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1498 fwrite_buffer(ref_info, 1, len, buf);
1499 free(ref_info);
1500
1501 if (o->type == OBJ_TAG) {
1502 o = deref_tag(o, ls->dentry_name, 0);
1503 if (o) {
1504 len = strlen(ls->dentry_name) + 45;
1505 ref_info = xcalloc(len + 1, 1);
1506 sprintf(ref_info, "%s %s^{}\n",
1507 sha1_to_hex(o->sha1), ls->dentry_name);
1508 fwrite_buffer(ref_info, 1, len, buf);
1509 free(ref_info);
1510 }
1511 }
1512 free(ref);
1513 }
1514
1515 static void update_remote_info_refs(struct remote_lock *lock)
1516 {
1517 struct buffer buffer = { STRBUF_INIT, 0 };
1518 struct active_request_slot *slot;
1519 struct slot_results results;
1520 struct curl_slist *dav_headers;
1521
1522 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1523 add_remote_info_ref, &buffer.buf);
1524 if (!aborted) {
1525 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1526
1527 slot = get_active_slot();
1528 slot->results = &results;
1529 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1530 &buffer, fwrite_null);
1531 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1532
1533 if (start_active_slot(slot)) {
1534 run_active_slot(slot);
1535 if (results.curl_result != CURLE_OK) {
1536 fprintf(stderr,
1537 "PUT error: curl result=%d, HTTP code=%ld\n",
1538 results.curl_result, results.http_code);
1539 }
1540 }
1541 }
1542 strbuf_release(&buffer.buf);
1543 }
1544
1545 static int remote_exists(const char *path)
1546 {
1547 char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1548 int ret;
1549
1550 sprintf(url, "%s%s", repo->url, path);
1551
1552 switch (http_get_strbuf(url, NULL, NULL)) {
1553 case HTTP_OK:
1554 ret = 1;
1555 break;
1556 case HTTP_MISSING_TARGET:
1557 ret = 0;
1558 break;
1559 case HTTP_ERROR:
1560 error("unable to access '%s': %s", url, curl_errorstr);
1561 default:
1562 ret = -1;
1563 }
1564 free(url);
1565 return ret;
1566 }
1567
1568 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
1569 {
1570 char *url;
1571 struct strbuf buffer = STRBUF_INIT;
1572 const char *name;
1573
1574 url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1575 sprintf(url, "%s%s", repo->url, path);
1576
1577 if (http_get_strbuf(url, &buffer, NULL) != HTTP_OK)
1578 die("Couldn't get %s for remote symref\n%s", url,
1579 curl_errorstr);
1580 free(url);
1581
1582 free(*symref);
1583 *symref = NULL;
1584 hashclr(sha1);
1585
1586 if (buffer.len == 0)
1587 return;
1588
1589 /* If it's a symref, set the refname; otherwise try for a sha1 */
1590 if (skip_prefix(buffer.buf, "ref: ", &name)) {
1591 *symref = xmemdupz(name, buffer.len - (name - buffer.buf));
1592 } else {
1593 get_sha1_hex(buffer.buf, sha1);
1594 }
1595
1596 strbuf_release(&buffer);
1597 }
1598
1599 static int verify_merge_base(unsigned char *head_sha1, struct ref *remote)
1600 {
1601 struct commit *head = lookup_commit_or_die(head_sha1, "HEAD");
1602 struct commit *branch = lookup_commit_or_die(remote->old_sha1, remote->name);
1603
1604 return in_merge_bases(branch, head);
1605 }
1606
1607 static int delete_remote_branch(const char *pattern, int force)
1608 {
1609 struct ref *refs = remote_refs;
1610 struct ref *remote_ref = NULL;
1611 unsigned char head_sha1[20];
1612 char *symref = NULL;
1613 int match;
1614 int patlen = strlen(pattern);
1615 int i;
1616 struct active_request_slot *slot;
1617 struct slot_results results;
1618 char *url;
1619
1620 /* Find the remote branch(es) matching the specified branch name */
1621 for (match = 0; refs; refs = refs->next) {
1622 char *name = refs->name;
1623 int namelen = strlen(name);
1624 if (namelen < patlen ||
1625 memcmp(name + namelen - patlen, pattern, patlen))
1626 continue;
1627 if (namelen != patlen && name[namelen - patlen - 1] != '/')
1628 continue;
1629 match++;
1630 remote_ref = refs;
1631 }
1632 if (match == 0)
1633 return error("No remote branch matches %s", pattern);
1634 if (match != 1)
1635 return error("More than one remote branch matches %s",
1636 pattern);
1637
1638 /*
1639 * Remote HEAD must be a symref (not exactly foolproof; a remote
1640 * symlink to a symref will look like a symref)
1641 */
1642 fetch_symref("HEAD", &symref, head_sha1);
1643 if (!symref)
1644 return error("Remote HEAD is not a symref");
1645
1646 /* Remote branch must not be the remote HEAD */
1647 for (i = 0; symref && i < MAXDEPTH; i++) {
1648 if (!strcmp(remote_ref->name, symref))
1649 return error("Remote branch %s is the current HEAD",
1650 remote_ref->name);
1651 fetch_symref(symref, &symref, head_sha1);
1652 }
1653
1654 /* Run extra sanity checks if delete is not forced */
1655 if (!force) {
1656 /* Remote HEAD must resolve to a known object */
1657 if (symref)
1658 return error("Remote HEAD symrefs too deep");
1659 if (is_null_sha1(head_sha1))
1660 return error("Unable to resolve remote HEAD");
1661 if (!has_sha1_file(head_sha1))
1662 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
1663
1664 /* Remote branch must resolve to a known object */
1665 if (is_null_sha1(remote_ref->old_sha1))
1666 return error("Unable to resolve remote branch %s",
1667 remote_ref->name);
1668 if (!has_sha1_file(remote_ref->old_sha1))
1669 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));
1670
1671 /* Remote branch must be an ancestor of remote HEAD */
1672 if (!verify_merge_base(head_sha1, remote_ref)) {
1673 return error("The branch '%s' is not an ancestor "
1674 "of your current HEAD.\n"
1675 "If you are sure you want to delete it,"
1676 " run:\n\t'git http-push -D %s %s'",
1677 remote_ref->name, repo->url, pattern);
1678 }
1679 }
1680
1681 /* Send delete request */
1682 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
1683 if (dry_run)
1684 return 0;
1685 url = xmalloc(strlen(repo->url) + strlen(remote_ref->name) + 1);
1686 sprintf(url, "%s%s", repo->url, remote_ref->name);
1687 slot = get_active_slot();
1688 slot->results = &results;
1689 curl_setup_http_get(slot->curl, url, DAV_DELETE);
1690 if (start_active_slot(slot)) {
1691 run_active_slot(slot);
1692 free(url);
1693 if (results.curl_result != CURLE_OK)
1694 return error("DELETE request failed (%d/%ld)",
1695 results.curl_result, results.http_code);
1696 } else {
1697 free(url);
1698 return error("Unable to start DELETE request");
1699 }
1700
1701 return 0;
1702 }
1703
1704 static void run_request_queue(void)
1705 {
1706 #ifdef USE_CURL_MULTI
1707 is_running_queue = 1;
1708 fill_active_slots();
1709 add_fill_function(NULL, fill_active_slot);
1710 #endif
1711 do {
1712 finish_all_active_slots();
1713 #ifdef USE_CURL_MULTI
1714 fill_active_slots();
1715 #endif
1716 } while (request_queue_head && !aborted);
1717
1718 #ifdef USE_CURL_MULTI
1719 is_running_queue = 0;
1720 #endif
1721 }
1722
1723 int main(int argc, char **argv)
1724 {
1725 struct transfer_request *request;
1726 struct transfer_request *next_request;
1727 int nr_refspec = 0;
1728 char **refspec = NULL;
1729 struct remote_lock *ref_lock = NULL;
1730 struct remote_lock *info_ref_lock = NULL;
1731 struct rev_info revs;
1732 int delete_branch = 0;
1733 int force_delete = 0;
1734 int objects_to_send;
1735 int rc = 0;
1736 int i;
1737 int new_refs;
1738 struct ref *ref, *local_refs;
1739
1740 git_setup_gettext();
1741
1742 git_extract_argv0_path(argv[0]);
1743
1744 repo = xcalloc(1, sizeof(*repo));
1745
1746 argv++;
1747 for (i = 1; i < argc; i++, argv++) {
1748 char *arg = *argv;
1749
1750 if (*arg == '-') {
1751 if (!strcmp(arg, "--all")) {
1752 push_all = MATCH_REFS_ALL;
1753 continue;
1754 }
1755 if (!strcmp(arg, "--force")) {
1756 force_all = 1;
1757 continue;
1758 }
1759 if (!strcmp(arg, "--dry-run")) {
1760 dry_run = 1;
1761 continue;
1762 }
1763 if (!strcmp(arg, "--helper-status")) {
1764 helper_status = 1;
1765 continue;
1766 }
1767 if (!strcmp(arg, "--verbose")) {
1768 push_verbosely = 1;
1769 http_is_verbose = 1;
1770 continue;
1771 }
1772 if (!strcmp(arg, "-d")) {
1773 delete_branch = 1;
1774 continue;
1775 }
1776 if (!strcmp(arg, "-D")) {
1777 delete_branch = 1;
1778 force_delete = 1;
1779 continue;
1780 }
1781 if (!strcmp(arg, "-h"))
1782 usage(http_push_usage);
1783 }
1784 if (!repo->url) {
1785 char *path = strstr(arg, "//");
1786 str_end_url_with_slash(arg, &repo->url);
1787 repo->path_len = strlen(repo->url);
1788 if (path) {
1789 repo->path = strchr(path+2, '/');
1790 if (repo->path)
1791 repo->path_len = strlen(repo->path);
1792 }
1793 continue;
1794 }
1795 refspec = argv;
1796 nr_refspec = argc - i;
1797 break;
1798 }
1799
1800 #ifndef USE_CURL_MULTI
1801 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
1802 #endif
1803
1804 if (!repo->url)
1805 usage(http_push_usage);
1806
1807 if (delete_branch && nr_refspec != 1)
1808 die("You must specify only one branch name when deleting a remote branch");
1809
1810 setup_git_directory();
1811
1812 memset(remote_dir_exists, -1, 256);
1813
1814 http_init(NULL, repo->url, 1);
1815
1816 #ifdef USE_CURL_MULTI
1817 is_running_queue = 0;
1818 #endif
1819
1820 /* Verify DAV compliance/lock support */
1821 if (!locking_available()) {
1822 rc = 1;
1823 goto cleanup;
1824 }
1825
1826 sigchain_push_common(remove_locks_on_signal);
1827
1828 /* Check whether the remote has server info files */
1829 repo->can_update_info_refs = 0;
1830 repo->has_info_refs = remote_exists("info/refs");
1831 repo->has_info_packs = remote_exists("objects/info/packs");
1832 if (repo->has_info_refs) {
1833 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
1834 if (info_ref_lock)
1835 repo->can_update_info_refs = 1;
1836 else {
1837 error("cannot lock existing info/refs");
1838 rc = 1;
1839 goto cleanup;
1840 }
1841 }
1842 if (repo->has_info_packs)
1843 fetch_indices();
1844
1845 /* Get a list of all local and remote heads to validate refspecs */
1846 local_refs = get_local_heads();
1847 fprintf(stderr, "Fetching remote heads...\n");
1848 get_dav_remote_heads();
1849 run_request_queue();
1850
1851 /* Remove a remote branch if -d or -D was specified */
1852 if (delete_branch) {
1853 if (delete_remote_branch(refspec[0], force_delete) == -1) {
1854 fprintf(stderr, "Unable to delete remote branch %s\n",
1855 refspec[0]);
1856 if (helper_status)
1857 printf("error %s cannot remove\n", refspec[0]);
1858 }
1859 goto cleanup;
1860 }
1861
1862 /* match them up */
1863 if (match_push_refs(local_refs, &remote_refs,
1864 nr_refspec, (const char **) refspec, push_all)) {
1865 rc = -1;
1866 goto cleanup;
1867 }
1868 if (!remote_refs) {
1869 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
1870 if (helper_status)
1871 printf("error null no match\n");
1872 rc = 0;
1873 goto cleanup;
1874 }
1875
1876 new_refs = 0;
1877 for (ref = remote_refs; ref; ref = ref->next) {
1878 char old_hex[60], *new_hex;
1879 const char *commit_argv[5];
1880 int commit_argc;
1881 char *new_sha1_hex, *old_sha1_hex;
1882
1883 if (!ref->peer_ref)
1884 continue;
1885
1886 if (is_null_sha1(ref->peer_ref->new_sha1)) {
1887 if (delete_remote_branch(ref->name, 1) == -1) {
1888 error("Could not remove %s", ref->name);
1889 if (helper_status)
1890 printf("error %s cannot remove\n", ref->name);
1891 rc = -4;
1892 }
1893 else if (helper_status)
1894 printf("ok %s\n", ref->name);
1895 new_refs++;
1896 continue;
1897 }
1898
1899 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
1900 if (push_verbosely)
1901 fprintf(stderr, "'%s': up-to-date\n", ref->name);
1902 if (helper_status)
1903 printf("ok %s up to date\n", ref->name);
1904 continue;
1905 }
1906
1907 if (!force_all &&
1908 !is_null_sha1(ref->old_sha1) &&
1909 !ref->force) {
1910 if (!has_sha1_file(ref->old_sha1) ||
1911 !ref_newer(ref->peer_ref->new_sha1,
1912 ref->old_sha1)) {
1913 /*
1914 * We do not have the remote ref, or
1915 * we know that the remote ref is not
1916 * an ancestor of what we are trying to
1917 * push. Either way this can be losing
1918 * commits at the remote end and likely
1919 * we were not up to date to begin with.
1920 */
1921 error("remote '%s' is not an ancestor of\n"
1922 "local '%s'.\n"
1923 "Maybe you are not up-to-date and "
1924 "need to pull first?",
1925 ref->name,
1926 ref->peer_ref->name);
1927 if (helper_status)
1928 printf("error %s non-fast forward\n", ref->name);
1929 rc = -2;
1930 continue;
1931 }
1932 }
1933 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
1934 new_refs++;
1935 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
1936 new_hex = sha1_to_hex(ref->new_sha1);
1937
1938 fprintf(stderr, "updating '%s'", ref->name);
1939 if (strcmp(ref->name, ref->peer_ref->name))
1940 fprintf(stderr, " using '%s'", ref->peer_ref->name);
1941 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
1942 if (dry_run) {
1943 if (helper_status)
1944 printf("ok %s\n", ref->name);
1945 continue;
1946 }
1947
1948 /* Lock remote branch ref */
1949 ref_lock = lock_remote(ref->name, LOCK_TIME);
1950 if (ref_lock == NULL) {
1951 fprintf(stderr, "Unable to lock remote branch %s\n",
1952 ref->name);
1953 if (helper_status)
1954 printf("error %s lock error\n", ref->name);
1955 rc = 1;
1956 continue;
1957 }
1958
1959 /* Set up revision info for this refspec */
1960 commit_argc = 3;
1961 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
1962 old_sha1_hex = NULL;
1963 commit_argv[1] = "--objects";
1964 commit_argv[2] = new_sha1_hex;
1965 if (!push_all && !is_null_sha1(ref->old_sha1)) {
1966 old_sha1_hex = xmalloc(42);
1967 sprintf(old_sha1_hex, "^%s",
1968 sha1_to_hex(ref->old_sha1));
1969 commit_argv[3] = old_sha1_hex;
1970 commit_argc++;
1971 }
1972 commit_argv[commit_argc] = NULL;
1973 init_revisions(&revs, setup_git_directory());
1974 setup_revisions(commit_argc, commit_argv, &revs, NULL);
1975 revs.edge_hint = 0; /* just in case */
1976 free(new_sha1_hex);
1977 if (old_sha1_hex) {
1978 free(old_sha1_hex);
1979 commit_argv[1] = NULL;
1980 }
1981
1982 /* Generate a list of objects that need to be pushed */
1983 pushing = 0;
1984 if (prepare_revision_walk(&revs))
1985 die("revision walk setup failed");
1986 mark_edges_uninteresting(&revs, NULL);
1987 objects_to_send = get_delta(&revs, ref_lock);
1988 finish_all_active_slots();
1989
1990 /* Push missing objects to remote, this would be a
1991 convenient time to pack them first if appropriate. */
1992 pushing = 1;
1993 if (objects_to_send)
1994 fprintf(stderr, " sending %d objects\n",
1995 objects_to_send);
1996
1997 run_request_queue();
1998
1999 /* Update the remote branch if all went well */
2000 if (aborted || !update_remote(ref->new_sha1, ref_lock))
2001 rc = 1;
2002
2003 if (!rc)
2004 fprintf(stderr, " done\n");
2005 if (helper_status)
2006 printf("%s %s\n", !rc ? "ok" : "error", ref->name);
2007 unlock_remote(ref_lock);
2008 check_locks();
2009 }
2010
2011 /* Update remote server info if appropriate */
2012 if (repo->has_info_refs && new_refs) {
2013 if (info_ref_lock && repo->can_update_info_refs) {
2014 fprintf(stderr, "Updating remote server info\n");
2015 if (!dry_run)
2016 update_remote_info_refs(info_ref_lock);
2017 } else {
2018 fprintf(stderr, "Unable to update server info\n");
2019 }
2020 }
2021
2022 cleanup:
2023 if (info_ref_lock)
2024 unlock_remote(info_ref_lock);
2025 free(repo);
2026
2027 http_cleanup();
2028
2029 request = request_queue_head;
2030 while (request != NULL) {
2031 next_request = request->next;
2032 release_request(request);
2033 request = next_request;
2034 }
2035
2036 return rc;
2037 }
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