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git-commit: Allow to amend a merge commit that does not change the tree
[alt-git.git] / http-push.c
blob78283b4de3b9111d87368df747daa96b5f6c09c3
1 #include "cache.h"
2 #include "commit.h"
3 #include "pack.h"
4 #include "tag.h"
5 #include "blob.h"
6 #include "http.h"
7 #include "refs.h"
8 #include "diff.h"
9 #include "revision.h"
10 #include "exec_cmd.h"
11 #include "remote.h"
12
13 #include <expat.h>
14
15 static const char http_push_usage[] =
16 "git-http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
17
18 #ifndef XML_STATUS_OK
19 enum XML_Status {
20 XML_STATUS_OK = 1,
21 XML_STATUS_ERROR = 0
22 };
23 #define XML_STATUS_OK 1
24 #define XML_STATUS_ERROR 0
25 #endif
26
27 #define PREV_BUF_SIZE 4096
28 #define RANGE_HEADER_SIZE 30
29
30 /* DAV methods */
31 #define DAV_LOCK "LOCK"
32 #define DAV_MKCOL "MKCOL"
33 #define DAV_MOVE "MOVE"
34 #define DAV_PROPFIND "PROPFIND"
35 #define DAV_PUT "PUT"
36 #define DAV_UNLOCK "UNLOCK"
37 #define DAV_DELETE "DELETE"
38
39 /* DAV lock flags */
40 #define DAV_PROP_LOCKWR (1u << 0)
41 #define DAV_PROP_LOCKEX (1u << 1)
42 #define DAV_LOCK_OK (1u << 2)
43
44 /* DAV XML properties */
45 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
46 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
47 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
48 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
49 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
50 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
51 #define DAV_PROPFIND_RESP ".multistatus.response"
52 #define DAV_PROPFIND_NAME ".multistatus.response.href"
53 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
54
55 /* DAV request body templates */
56 #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>"
57 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
58 #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>"
59
60 #define LOCK_TIME 600
61 #define LOCK_REFRESH 30
62
63 /* bits #0-15 in revision.h */
64
65 #define LOCAL (1u<<16)
66 #define REMOTE (1u<<17)
67 #define FETCHING (1u<<18)
68 #define PUSHING (1u<<19)
69
70 /* We allow "recursive" symbolic refs. Only within reason, though */
71 #define MAXDEPTH 5
72
73 static int pushing;
74 static int aborted;
75 static signed char remote_dir_exists[256];
76
77 static struct curl_slist *no_pragma_header;
78 static struct curl_slist *default_headers;
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
85 static struct object_list *objects;
86
87 struct repo
88 {
89 char *url;
90 int path_len;
91 int has_info_refs;
92 int can_update_info_refs;
93 int has_info_packs;
94 struct packed_git *packs;
95 struct remote_lock *locks;
96 };
97
98 static struct repo *remote;
99
100 enum transfer_state {
101 NEED_FETCH,
102 RUN_FETCH_LOOSE,
103 RUN_FETCH_PACKED,
104 NEED_PUSH,
105 RUN_MKCOL,
106 RUN_PUT,
107 RUN_MOVE,
108 ABORTED,
109 COMPLETE,
110 };
111
112 struct transfer_request
113 {
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 char filename[PATH_MAX];
121 char tmpfile[PATH_MAX];
122 int local_fileno;
123 FILE *local_stream;
124 enum transfer_state state;
125 CURLcode curl_result;
126 char errorstr[CURL_ERROR_SIZE];
127 long http_code;
128 unsigned char real_sha1[20];
129 SHA_CTX c;
130 z_stream stream;
131 int zret;
132 int rename;
133 void *userData;
134 struct active_request_slot *slot;
135 struct transfer_request *next;
136 };
137
138 static struct transfer_request *request_queue_head;
139
140 struct xml_ctx
141 {
142 char *name;
143 int len;
144 char *cdata;
145 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
146 void *userData;
147 };
148
149 struct remote_lock
150 {
151 char *url;
152 char *owner;
153 char *token;
154 time_t start_time;
155 long timeout;
156 int refreshing;
157 struct remote_lock *next;
158 };
159
160 /* Flags that control remote_ls processing */
161 #define PROCESS_FILES (1u << 0)
162 #define PROCESS_DIRS (1u << 1)
163 #define RECURSIVE (1u << 2)
164
165 /* Flags that remote_ls passes to callback functions */
166 #define IS_DIR (1u << 0)
167
168 struct remote_ls_ctx
169 {
170 char *path;
171 void (*userFunc)(struct remote_ls_ctx *ls);
172 void *userData;
173 int flags;
174 char *dentry_name;
175 int dentry_flags;
176 struct remote_ls_ctx *parent;
177 };
178
179 static void finish_request(struct transfer_request *request);
180 static void release_request(struct transfer_request *request);
181
182 static void process_response(void *callback_data)
183 {
184 struct transfer_request *request =
185 (struct transfer_request *)callback_data;
186
187 finish_request(request);
188 }
189
190 #ifdef USE_CURL_MULTI
191 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
192 void *data)
193 {
194 unsigned char expn[4096];
195 size_t size = eltsize * nmemb;
196 int posn = 0;
197 struct transfer_request *request = (struct transfer_request *)data;
198 do {
199 ssize_t retval = xwrite(request->local_fileno,
200 (char *) ptr + posn, size - posn);
201 if (retval < 0)
202 return posn;
203 posn += retval;
204 } while (posn < size);
205
206 request->stream.avail_in = size;
207 request->stream.next_in = ptr;
208 do {
209 request->stream.next_out = expn;
210 request->stream.avail_out = sizeof(expn);
211 request->zret = inflate(&request->stream, Z_SYNC_FLUSH);
212 SHA1_Update(&request->c, expn,
213 sizeof(expn) - request->stream.avail_out);
214 } while (request->stream.avail_in && request->zret == Z_OK);
215 data_received++;
216 return size;
217 }
218
219 static void start_fetch_loose(struct transfer_request *request)
220 {
221 char *hex = sha1_to_hex(request->obj->sha1);
222 char *filename;
223 char prevfile[PATH_MAX];
224 char *url;
225 char *posn;
226 int prevlocal;
227 unsigned char prev_buf[PREV_BUF_SIZE];
228 ssize_t prev_read = 0;
229 long prev_posn = 0;
230 char range[RANGE_HEADER_SIZE];
231 struct curl_slist *range_header = NULL;
232 struct active_request_slot *slot;
233
234 filename = sha1_file_name(request->obj->sha1);
235 snprintf(request->filename, sizeof(request->filename), "%s", filename);
236 snprintf(request->tmpfile, sizeof(request->tmpfile),
237 "%s.temp", filename);
238
239 snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
240 unlink(prevfile);
241 rename(request->tmpfile, prevfile);
242 unlink(request->tmpfile);
243
244 if (request->local_fileno != -1)
245 error("fd leakage in start: %d", request->local_fileno);
246 request->local_fileno = open(request->tmpfile,
247 O_WRONLY | O_CREAT | O_EXCL, 0666);
248 /* This could have failed due to the "lazy directory creation";
249 * try to mkdir the last path component.
250 */
251 if (request->local_fileno < 0 && errno == ENOENT) {
252 char *dir = strrchr(request->tmpfile, '/');
253 if (dir) {
254 *dir = 0;
255 mkdir(request->tmpfile, 0777);
256 *dir = '/';
257 }
258 request->local_fileno = open(request->tmpfile,
259 O_WRONLY | O_CREAT | O_EXCL, 0666);
260 }
261
262 if (request->local_fileno < 0) {
263 request->state = ABORTED;
264 error("Couldn't create temporary file %s for %s: %s",
265 request->tmpfile, request->filename, strerror(errno));
266 return;
267 }
268
269 memset(&request->stream, 0, sizeof(request->stream));
270
271 inflateInit(&request->stream);
272
273 SHA1_Init(&request->c);
274
275 url = xmalloc(strlen(remote->url) + 50);
276 request->url = xmalloc(strlen(remote->url) + 50);
277 strcpy(url, remote->url);
278 posn = url + strlen(remote->url);
279 strcpy(posn, "objects/");
280 posn += 8;
281 memcpy(posn, hex, 2);
282 posn += 2;
283 *(posn++) = '/';
284 strcpy(posn, hex + 2);
285 strcpy(request->url, url);
286
287 /* If a previous temp file is present, process what was already
288 fetched. */
289 prevlocal = open(prevfile, O_RDONLY);
290 if (prevlocal != -1) {
291 do {
292 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
293 if (prev_read>0) {
294 if (fwrite_sha1_file(prev_buf,
295 1,
296 prev_read,
297 request) == prev_read) {
298 prev_posn += prev_read;
299 } else {
300 prev_read = -1;
301 }
302 }
303 } while (prev_read > 0);
304 close(prevlocal);
305 }
306 unlink(prevfile);
307
308 /* Reset inflate/SHA1 if there was an error reading the previous temp
309 file; also rewind to the beginning of the local file. */
310 if (prev_read == -1) {
311 memset(&request->stream, 0, sizeof(request->stream));
312 inflateInit(&request->stream);
313 SHA1_Init(&request->c);
314 if (prev_posn>0) {
315 prev_posn = 0;
316 lseek(request->local_fileno, 0, SEEK_SET);
317 ftruncate(request->local_fileno, 0);
318 }
319 }
320
321 slot = get_active_slot();
322 slot->callback_func = process_response;
323 slot->callback_data = request;
324 request->slot = slot;
325
326 curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
327 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
328 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
329 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
330 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
331
332 /* If we have successfully processed data from a previous fetch
333 attempt, only fetch the data we don't already have. */
334 if (prev_posn>0) {
335 if (push_verbosely)
336 fprintf(stderr,
337 "Resuming fetch of object %s at byte %ld\n",
338 hex, prev_posn);
339 sprintf(range, "Range: bytes=%ld-", prev_posn);
340 range_header = curl_slist_append(range_header, range);
341 curl_easy_setopt(slot->curl,
342 CURLOPT_HTTPHEADER, range_header);
343 }
344
345 /* Try to get the request started, abort the request on error */
346 request->state = RUN_FETCH_LOOSE;
347 if (!start_active_slot(slot)) {
348 fprintf(stderr, "Unable to start GET request\n");
349 remote->can_update_info_refs = 0;
350 release_request(request);
351 }
352 }
353
354 static void start_mkcol(struct transfer_request *request)
355 {
356 char *hex = sha1_to_hex(request->obj->sha1);
357 struct active_request_slot *slot;
358 char *posn;
359
360 request->url = xmalloc(strlen(remote->url) + 13);
361 strcpy(request->url, remote->url);
362 posn = request->url + strlen(remote->url);
363 strcpy(posn, "objects/");
364 posn += 8;
365 memcpy(posn, hex, 2);
366 posn += 2;
367 strcpy(posn, "/");
368
369 slot = get_active_slot();
370 slot->callback_func = process_response;
371 slot->callback_data = request;
372 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
373 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
374 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
375 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
376 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
377
378 if (start_active_slot(slot)) {
379 request->slot = slot;
380 request->state = RUN_MKCOL;
381 } else {
382 request->state = ABORTED;
383 free(request->url);
384 request->url = NULL;
385 }
386 }
387 #endif
388
389 static void start_fetch_packed(struct transfer_request *request)
390 {
391 char *url;
392 struct packed_git *target;
393 FILE *packfile;
394 char *filename;
395 long prev_posn = 0;
396 char range[RANGE_HEADER_SIZE];
397 struct curl_slist *range_header = NULL;
398
399 struct transfer_request *check_request = request_queue_head;
400 struct active_request_slot *slot;
401
402 target = find_sha1_pack(request->obj->sha1, remote->packs);
403 if (!target) {
404 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
405 remote->can_update_info_refs = 0;
406 release_request(request);
407 return;
408 }
409
410 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
411 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
412
413 filename = sha1_pack_name(target->sha1);
414 snprintf(request->filename, sizeof(request->filename), "%s", filename);
415 snprintf(request->tmpfile, sizeof(request->tmpfile),
416 "%s.temp", filename);
417
418 url = xmalloc(strlen(remote->url) + 64);
419 sprintf(url, "%sobjects/pack/pack-%s.pack",
420 remote->url, sha1_to_hex(target->sha1));
421
422 /* Make sure there isn't another open request for this pack */
423 while (check_request) {
424 if (check_request->state == RUN_FETCH_PACKED &&
425 !strcmp(check_request->url, url)) {
426 free(url);
427 release_request(request);
428 return;
429 }
430 check_request = check_request->next;
431 }
432
433 packfile = fopen(request->tmpfile, "a");
434 if (!packfile) {
435 fprintf(stderr, "Unable to open local file %s for pack",
436 request->tmpfile);
437 remote->can_update_info_refs = 0;
438 free(url);
439 return;
440 }
441
442 slot = get_active_slot();
443 slot->callback_func = process_response;
444 slot->callback_data = request;
445 request->slot = slot;
446 request->local_stream = packfile;
447 request->userData = target;
448
449 request->url = url;
450 curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
451 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
452 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
453 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
454 slot->local = packfile;
455
456 /* If there is data present from a previous transfer attempt,
457 resume where it left off */
458 prev_posn = ftell(packfile);
459 if (prev_posn>0) {
460 if (push_verbosely)
461 fprintf(stderr,
462 "Resuming fetch of pack %s at byte %ld\n",
463 sha1_to_hex(target->sha1), prev_posn);
464 sprintf(range, "Range: bytes=%ld-", prev_posn);
465 range_header = curl_slist_append(range_header, range);
466 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
467 }
468
469 /* Try to get the request started, abort the request on error */
470 request->state = RUN_FETCH_PACKED;
471 if (!start_active_slot(slot)) {
472 fprintf(stderr, "Unable to start GET request\n");
473 remote->can_update_info_refs = 0;
474 release_request(request);
475 }
476 }
477
478 static void start_put(struct transfer_request *request)
479 {
480 char *hex = sha1_to_hex(request->obj->sha1);
481 struct active_request_slot *slot;
482 char *posn;
483 enum object_type type;
484 char hdr[50];
485 void *unpacked;
486 unsigned long len;
487 int hdrlen;
488 ssize_t size;
489 z_stream stream;
490
491 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
492 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
493
494 /* Set it up */
495 memset(&stream, 0, sizeof(stream));
496 deflateInit(&stream, zlib_compression_level);
497 size = deflateBound(&stream, len + hdrlen);
498 request->buffer.buffer = xmalloc(size);
499
500 /* Compress it */
501 stream.next_out = request->buffer.buffer;
502 stream.avail_out = size;
503
504 /* First header.. */
505 stream.next_in = (void *)hdr;
506 stream.avail_in = hdrlen;
507 while (deflate(&stream, 0) == Z_OK)
508 /* nothing */;
509
510 /* Then the data itself.. */
511 stream.next_in = unpacked;
512 stream.avail_in = len;
513 while (deflate(&stream, Z_FINISH) == Z_OK)
514 /* nothing */;
515 deflateEnd(&stream);
516 free(unpacked);
517
518 request->buffer.size = stream.total_out;
519 request->buffer.posn = 0;
520
521 request->url = xmalloc(strlen(remote->url) +
522 strlen(request->lock->token) + 51);
523 strcpy(request->url, remote->url);
524 posn = request->url + strlen(remote->url);
525 strcpy(posn, "objects/");
526 posn += 8;
527 memcpy(posn, hex, 2);
528 posn += 2;
529 *(posn++) = '/';
530 strcpy(posn, hex + 2);
531 request->dest = xmalloc(strlen(request->url) + 14);
532 sprintf(request->dest, "Destination: %s", request->url);
533 posn += 38;
534 *(posn++) = '_';
535 strcpy(posn, request->lock->token);
536
537 slot = get_active_slot();
538 slot->callback_func = process_response;
539 slot->callback_data = request;
540 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
541 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.size);
542 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
543 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
544 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
545 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
546 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
547 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
548 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
549
550 if (start_active_slot(slot)) {
551 request->slot = slot;
552 request->state = RUN_PUT;
553 } else {
554 request->state = ABORTED;
555 free(request->url);
556 request->url = NULL;
557 }
558 }
559
560 static void start_move(struct transfer_request *request)
561 {
562 struct active_request_slot *slot;
563 struct curl_slist *dav_headers = NULL;
564
565 slot = get_active_slot();
566 slot->callback_func = process_response;
567 slot->callback_data = request;
568 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
569 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
570 dav_headers = curl_slist_append(dav_headers, request->dest);
571 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
572 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
573 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
574 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
575
576 if (start_active_slot(slot)) {
577 request->slot = slot;
578 request->state = RUN_MOVE;
579 } else {
580 request->state = ABORTED;
581 free(request->url);
582 request->url = NULL;
583 }
584 }
585
586 static int refresh_lock(struct remote_lock *lock)
587 {
588 struct active_request_slot *slot;
589 struct slot_results results;
590 char *if_header;
591 char timeout_header[25];
592 struct curl_slist *dav_headers = NULL;
593 int rc = 0;
594
595 lock->refreshing = 1;
596
597 if_header = xmalloc(strlen(lock->token) + 25);
598 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
599 sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
600 dav_headers = curl_slist_append(dav_headers, if_header);
601 dav_headers = curl_slist_append(dav_headers, timeout_header);
602
603 slot = get_active_slot();
604 slot->results = &results;
605 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
606 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
607 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
608 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
609 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
610
611 if (start_active_slot(slot)) {
612 run_active_slot(slot);
613 if (results.curl_result != CURLE_OK) {
614 fprintf(stderr, "LOCK HTTP error %ld\n",
615 results.http_code);
616 } else {
617 lock->start_time = time(NULL);
618 rc = 1;
619 }
620 }
621
622 lock->refreshing = 0;
623 curl_slist_free_all(dav_headers);
624 free(if_header);
625
626 return rc;
627 }
628
629 static void check_locks(void)
630 {
631 struct remote_lock *lock = remote->locks;
632 time_t current_time = time(NULL);
633 int time_remaining;
634
635 while (lock) {
636 time_remaining = lock->start_time + lock->timeout -
637 current_time;
638 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
639 if (!refresh_lock(lock)) {
640 fprintf(stderr,
641 "Unable to refresh lock for %s\n",
642 lock->url);
643 aborted = 1;
644 return;
645 }
646 }
647 lock = lock->next;
648 }
649 }
650
651 static void release_request(struct transfer_request *request)
652 {
653 struct transfer_request *entry = request_queue_head;
654
655 if (request == request_queue_head) {
656 request_queue_head = request->next;
657 } else {
658 while (entry->next != NULL && entry->next != request)
659 entry = entry->next;
660 if (entry->next == request)
661 entry->next = entry->next->next;
662 }
663
664 if (request->local_fileno != -1)
665 close(request->local_fileno);
666 if (request->local_stream)
667 fclose(request->local_stream);
668 if (request->url != NULL)
669 free(request->url);
670 free(request);
671 }
672
673 static void finish_request(struct transfer_request *request)
674 {
675 struct stat st;
676 struct packed_git *target;
677 struct packed_git **lst;
678
679 request->curl_result = request->slot->curl_result;
680 request->http_code = request->slot->http_code;
681 request->slot = NULL;
682
683 /* Keep locks active */
684 check_locks();
685
686 if (request->headers != NULL)
687 curl_slist_free_all(request->headers);
688
689 /* URL is reused for MOVE after PUT */
690 if (request->state != RUN_PUT) {
691 free(request->url);
692 request->url = NULL;
693 }
694
695 if (request->state == RUN_MKCOL) {
696 if (request->curl_result == CURLE_OK ||
697 request->http_code == 405) {
698 remote_dir_exists[request->obj->sha1[0]] = 1;
699 start_put(request);
700 } else {
701 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
702 sha1_to_hex(request->obj->sha1),
703 request->curl_result, request->http_code);
704 request->state = ABORTED;
705 aborted = 1;
706 }
707 } else if (request->state == RUN_PUT) {
708 if (request->curl_result == CURLE_OK) {
709 start_move(request);
710 } else {
711 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
712 sha1_to_hex(request->obj->sha1),
713 request->curl_result, request->http_code);
714 request->state = ABORTED;
715 aborted = 1;
716 }
717 } else if (request->state == RUN_MOVE) {
718 if (request->curl_result == CURLE_OK) {
719 if (push_verbosely)
720 fprintf(stderr, " sent %s\n",
721 sha1_to_hex(request->obj->sha1));
722 request->obj->flags |= REMOTE;
723 release_request(request);
724 } else {
725 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
726 sha1_to_hex(request->obj->sha1),
727 request->curl_result, request->http_code);
728 request->state = ABORTED;
729 aborted = 1;
730 }
731 } else if (request->state == RUN_FETCH_LOOSE) {
732 fchmod(request->local_fileno, 0444);
733 close(request->local_fileno); request->local_fileno = -1;
734
735 if (request->curl_result != CURLE_OK &&
736 request->http_code != 416) {
737 if (stat(request->tmpfile, &st) == 0) {
738 if (st.st_size == 0)
739 unlink(request->tmpfile);
740 }
741 } else {
742 if (request->http_code == 416)
743 fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
744
745 inflateEnd(&request->stream);
746 SHA1_Final(request->real_sha1, &request->c);
747 if (request->zret != Z_STREAM_END) {
748 unlink(request->tmpfile);
749 } else if (hashcmp(request->obj->sha1, request->real_sha1)) {
750 unlink(request->tmpfile);
751 } else {
752 request->rename =
753 move_temp_to_file(
754 request->tmpfile,
755 request->filename);
756 if (request->rename == 0) {
757 request->obj->flags |= (LOCAL | REMOTE);
758 }
759 }
760 }
761
762 /* Try fetching packed if necessary */
763 if (request->obj->flags & LOCAL)
764 release_request(request);
765 else
766 start_fetch_packed(request);
767
768 } else if (request->state == RUN_FETCH_PACKED) {
769 if (request->curl_result != CURLE_OK) {
770 fprintf(stderr, "Unable to get pack file %s\n%s",
771 request->url, curl_errorstr);
772 remote->can_update_info_refs = 0;
773 } else {
774 off_t pack_size = ftell(request->local_stream);
775
776 fclose(request->local_stream);
777 request->local_stream = NULL;
778 if (!move_temp_to_file(request->tmpfile,
779 request->filename)) {
780 target = (struct packed_git *)request->userData;
781 target->pack_size = pack_size;
782 lst = &remote->packs;
783 while (*lst != target)
784 lst = &((*lst)->next);
785 *lst = (*lst)->next;
786
787 if (!verify_pack(target, 0))
788 install_packed_git(target);
789 else
790 remote->can_update_info_refs = 0;
791 }
792 }
793 release_request(request);
794 }
795 }
796
797 #ifdef USE_CURL_MULTI
798 static int fill_active_slot(void *unused)
799 {
800 struct transfer_request *request = request_queue_head;
801
802 if (aborted)
803 return 0;
804
805 for (request = request_queue_head; request; request = request->next) {
806 if (request->state == NEED_FETCH) {
807 start_fetch_loose(request);
808 return 1;
809 } else if (pushing && request->state == NEED_PUSH) {
810 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
811 start_put(request);
812 } else {
813 start_mkcol(request);
814 }
815 return 1;
816 }
817 }
818 return 0;
819 }
820 #endif
821
822 static void get_remote_object_list(unsigned char parent);
823
824 static void add_fetch_request(struct object *obj)
825 {
826 struct transfer_request *request;
827
828 check_locks();
829
830 /*
831 * Don't fetch the object if it's known to exist locally
832 * or is already in the request queue
833 */
834 if (remote_dir_exists[obj->sha1[0]] == -1)
835 get_remote_object_list(obj->sha1[0]);
836 if (obj->flags & (LOCAL | FETCHING))
837 return;
838
839 obj->flags |= FETCHING;
840 request = xmalloc(sizeof(*request));
841 request->obj = obj;
842 request->url = NULL;
843 request->lock = NULL;
844 request->headers = NULL;
845 request->local_fileno = -1;
846 request->local_stream = NULL;
847 request->state = NEED_FETCH;
848 request->next = request_queue_head;
849 request_queue_head = request;
850
851 #ifdef USE_CURL_MULTI
852 fill_active_slots();
853 step_active_slots();
854 #endif
855 }
856
857 static int add_send_request(struct object *obj, struct remote_lock *lock)
858 {
859 struct transfer_request *request = request_queue_head;
860 struct packed_git *target;
861
862 /* Keep locks active */
863 check_locks();
864
865 /*
866 * Don't push the object if it's known to exist on the remote
867 * or is already in the request queue
868 */
869 if (remote_dir_exists[obj->sha1[0]] == -1)
870 get_remote_object_list(obj->sha1[0]);
871 if (obj->flags & (REMOTE | PUSHING))
872 return 0;
873 target = find_sha1_pack(obj->sha1, remote->packs);
874 if (target) {
875 obj->flags |= REMOTE;
876 return 0;
877 }
878
879 obj->flags |= PUSHING;
880 request = xmalloc(sizeof(*request));
881 request->obj = obj;
882 request->url = NULL;
883 request->lock = lock;
884 request->headers = NULL;
885 request->local_fileno = -1;
886 request->local_stream = NULL;
887 request->state = NEED_PUSH;
888 request->next = request_queue_head;
889 request_queue_head = request;
890
891 #ifdef USE_CURL_MULTI
892 fill_active_slots();
893 step_active_slots();
894 #endif
895
896 return 1;
897 }
898
899 static int fetch_index(unsigned char *sha1)
900 {
901 char *hex = sha1_to_hex(sha1);
902 char *filename;
903 char *url;
904 char tmpfile[PATH_MAX];
905 long prev_posn = 0;
906 char range[RANGE_HEADER_SIZE];
907 struct curl_slist *range_header = NULL;
908
909 FILE *indexfile;
910 struct active_request_slot *slot;
911 struct slot_results results;
912
913 /* Don't use the index if the pack isn't there */
914 url = xmalloc(strlen(remote->url) + 64);
915 sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
916 slot = get_active_slot();
917 slot->results = &results;
918 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
919 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
920 if (start_active_slot(slot)) {
921 run_active_slot(slot);
922 if (results.curl_result != CURLE_OK) {
923 free(url);
924 return error("Unable to verify pack %s is available",
925 hex);
926 }
927 } else {
928 return error("Unable to start request");
929 }
930
931 if (has_pack_index(sha1))
932 return 0;
933
934 if (push_verbosely)
935 fprintf(stderr, "Getting index for pack %s\n", hex);
936
937 sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
938
939 filename = sha1_pack_index_name(sha1);
940 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
941 indexfile = fopen(tmpfile, "a");
942 if (!indexfile)
943 return error("Unable to open local file %s for pack index",
944 tmpfile);
945
946 slot = get_active_slot();
947 slot->results = &results;
948 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
949 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
950 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
951 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
952 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
953 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
954 slot->local = indexfile;
955
956 /* If there is data present from a previous transfer attempt,
957 resume where it left off */
958 prev_posn = ftell(indexfile);
959 if (prev_posn>0) {
960 if (push_verbosely)
961 fprintf(stderr,
962 "Resuming fetch of index for pack %s at byte %ld\n",
963 hex, prev_posn);
964 sprintf(range, "Range: bytes=%ld-", prev_posn);
965 range_header = curl_slist_append(range_header, range);
966 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
967 }
968
969 if (start_active_slot(slot)) {
970 run_active_slot(slot);
971 if (results.curl_result != CURLE_OK) {
972 free(url);
973 fclose(indexfile);
974 return error("Unable to get pack index %s\n%s", url,
975 curl_errorstr);
976 }
977 } else {
978 free(url);
979 fclose(indexfile);
980 return error("Unable to start request");
981 }
982
983 free(url);
984 fclose(indexfile);
985
986 return move_temp_to_file(tmpfile, filename);
987 }
988
989 static int setup_index(unsigned char *sha1)
990 {
991 struct packed_git *new_pack;
992
993 if (fetch_index(sha1))
994 return -1;
995
996 new_pack = parse_pack_index(sha1);
997 new_pack->next = remote->packs;
998 remote->packs = new_pack;
999 return 0;
1000 }
1001
1002 static int fetch_indices(void)
1003 {
1004 unsigned char sha1[20];
1005 char *url;
1006 struct buffer buffer;
1007 char *data;
1008 int i = 0;
1009
1010 struct active_request_slot *slot;
1011 struct slot_results results;
1012
1013 data = xcalloc(1, 4096);
1014 buffer.size = 4096;
1015 buffer.posn = 0;
1016 buffer.buffer = data;
1017
1018 if (push_verbosely)
1019 fprintf(stderr, "Getting pack list\n");
1020
1021 url = xmalloc(strlen(remote->url) + 20);
1022 sprintf(url, "%sobjects/info/packs", remote->url);
1023
1024 slot = get_active_slot();
1025 slot->results = &results;
1026 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1027 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1028 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1029 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1030 if (start_active_slot(slot)) {
1031 run_active_slot(slot);
1032 if (results.curl_result != CURLE_OK) {
1033 free(buffer.buffer);
1034 free(url);
1035 if (results.http_code == 404)
1036 return 0;
1037 else
1038 return error("%s", curl_errorstr);
1039 }
1040 } else {
1041 free(buffer.buffer);
1042 free(url);
1043 return error("Unable to start request");
1044 }
1045 free(url);
1046
1047 data = buffer.buffer;
1048 while (i < buffer.posn) {
1049 switch (data[i]) {
1050 case 'P':
1051 i++;
1052 if (i + 52 < buffer.posn &&
1053 !prefixcmp(data + i, " pack-") &&
1054 !prefixcmp(data + i + 46, ".pack\n")) {
1055 get_sha1_hex(data + i + 6, sha1);
1056 setup_index(sha1);
1057 i += 51;
1058 break;
1059 }
1060 default:
1061 while (data[i] != '\n')
1062 i++;
1063 }
1064 i++;
1065 }
1066
1067 free(buffer.buffer);
1068 return 0;
1069 }
1070
1071 static inline int needs_quote(int ch)
1072 {
1073 if (((ch >= 'A') && (ch <= 'Z'))
1074 || ((ch >= 'a') && (ch <= 'z'))
1075 || ((ch >= '0') && (ch <= '9'))
1076 || (ch == '/')
1077 || (ch == '-')
1078 || (ch == '.'))
1079 return 0;
1080 return 1;
1081 }
1082
1083 static inline int hex(int v)
1084 {
1085 if (v < 10) return '0' + v;
1086 else return 'A' + v - 10;
1087 }
1088
1089 static char *quote_ref_url(const char *base, const char *ref)
1090 {
1091 const char *cp;
1092 char *dp, *qref;
1093 int len, baselen, ch;
1094
1095 baselen = strlen(base);
1096 len = baselen + 1;
1097 for (cp = ref; (ch = *cp) != 0; cp++, len++)
1098 if (needs_quote(ch))
1099 len += 2; /* extra two hex plus replacement % */
1100 qref = xmalloc(len);
1101 memcpy(qref, base, baselen);
1102 for (cp = ref, dp = qref + baselen; (ch = *cp) != 0; cp++) {
1103 if (needs_quote(ch)) {
1104 *dp++ = '%';
1105 *dp++ = hex((ch >> 4) & 0xF);
1106 *dp++ = hex(ch & 0xF);
1107 }
1108 else
1109 *dp++ = ch;
1110 }
1111 *dp = 0;
1112
1113 return qref;
1114 }
1115
1116 int fetch_ref(char *ref, unsigned char *sha1)
1117 {
1118 char *url;
1119 char hex[42];
1120 struct buffer buffer;
1121 char *base = remote->url;
1122 struct active_request_slot *slot;
1123 struct slot_results results;
1124 buffer.size = 41;
1125 buffer.posn = 0;
1126 buffer.buffer = hex;
1127 hex[41] = '\0';
1128
1129 url = quote_ref_url(base, ref);
1130 slot = get_active_slot();
1131 slot->results = &results;
1132 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1133 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1134 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1135 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1136 if (start_active_slot(slot)) {
1137 run_active_slot(slot);
1138 if (results.curl_result != CURLE_OK)
1139 return error("Couldn't get %s for %s\n%s",
1140 url, ref, curl_errorstr);
1141 } else {
1142 return error("Unable to start request");
1143 }
1144
1145 hex[40] = '\0';
1146 get_sha1_hex(hex, sha1);
1147 return 0;
1148 }
1149
1150 static void one_remote_object(const char *hex)
1151 {
1152 unsigned char sha1[20];
1153 struct object *obj;
1154
1155 if (get_sha1_hex(hex, sha1) != 0)
1156 return;
1157
1158 obj = lookup_object(sha1);
1159 if (!obj)
1160 obj = parse_object(sha1);
1161
1162 /* Ignore remote objects that don't exist locally */
1163 if (!obj)
1164 return;
1165
1166 obj->flags |= REMOTE;
1167 if (!object_list_contains(objects, obj))
1168 object_list_insert(obj, &objects);
1169 }
1170
1171 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1172 {
1173 int *lock_flags = (int *)ctx->userData;
1174
1175 if (tag_closed) {
1176 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1177 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1178 (*lock_flags & DAV_PROP_LOCKWR)) {
1179 *lock_flags |= DAV_LOCK_OK;
1180 }
1181 *lock_flags &= DAV_LOCK_OK;
1182 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1183 *lock_flags |= DAV_PROP_LOCKWR;
1184 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1185 *lock_flags |= DAV_PROP_LOCKEX;
1186 }
1187 }
1188 }
1189
1190 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1191 {
1192 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1193
1194 if (tag_closed && ctx->cdata) {
1195 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1196 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1197 strcpy(lock->owner, ctx->cdata);
1198 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1199 if (!prefixcmp(ctx->cdata, "Second-"))
1200 lock->timeout =
1201 strtol(ctx->cdata + 7, NULL, 10);
1202 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1203 if (!prefixcmp(ctx->cdata, "opaquelocktoken:")) {
1204 lock->token = xmalloc(strlen(ctx->cdata) - 15);
1205 strcpy(lock->token, ctx->cdata + 16);
1206 }
1207 }
1208 }
1209 }
1210
1211 static void one_remote_ref(char *refname);
1212
1213 static void
1214 xml_start_tag(void *userData, const char *name, const char **atts)
1215 {
1216 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1217 const char *c = strchr(name, ':');
1218 int new_len;
1219
1220 if (c == NULL)
1221 c = name;
1222 else
1223 c++;
1224
1225 new_len = strlen(ctx->name) + strlen(c) + 2;
1226
1227 if (new_len > ctx->len) {
1228 ctx->name = xrealloc(ctx->name, new_len);
1229 ctx->len = new_len;
1230 }
1231 strcat(ctx->name, ".");
1232 strcat(ctx->name, c);
1233
1234 free(ctx->cdata);
1235 ctx->cdata = NULL;
1236
1237 ctx->userFunc(ctx, 0);
1238 }
1239
1240 static void
1241 xml_end_tag(void *userData, const char *name)
1242 {
1243 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1244 const char *c = strchr(name, ':');
1245 char *ep;
1246
1247 ctx->userFunc(ctx, 1);
1248
1249 if (c == NULL)
1250 c = name;
1251 else
1252 c++;
1253
1254 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1255 *ep = 0;
1256 }
1257
1258 static void
1259 xml_cdata(void *userData, const XML_Char *s, int len)
1260 {
1261 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1262 free(ctx->cdata);
1263 ctx->cdata = xmemdupz(s, len);
1264 }
1265
1266 static struct remote_lock *lock_remote(const char *path, long timeout)
1267 {
1268 struct active_request_slot *slot;
1269 struct slot_results results;
1270 struct buffer out_buffer;
1271 struct buffer in_buffer;
1272 char *out_data;
1273 char *in_data;
1274 char *url;
1275 char *ep;
1276 char timeout_header[25];
1277 struct remote_lock *lock = NULL;
1278 XML_Parser parser = XML_ParserCreate(NULL);
1279 enum XML_Status result;
1280 struct curl_slist *dav_headers = NULL;
1281 struct xml_ctx ctx;
1282
1283 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1284 sprintf(url, "%s%s", remote->url, path);
1285
1286 /* Make sure leading directories exist for the remote ref */
1287 ep = strchr(url + strlen(remote->url) + 1, '/');
1288 while (ep) {
1289 *ep = 0;
1290 slot = get_active_slot();
1291 slot->results = &results;
1292 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1293 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1294 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1295 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1296 if (start_active_slot(slot)) {
1297 run_active_slot(slot);
1298 if (results.curl_result != CURLE_OK &&
1299 results.http_code != 405) {
1300 fprintf(stderr,
1301 "Unable to create branch path %s\n",
1302 url);
1303 free(url);
1304 return NULL;
1305 }
1306 } else {
1307 fprintf(stderr, "Unable to start MKCOL request\n");
1308 free(url);
1309 return NULL;
1310 }
1311 *ep = '/';
1312 ep = strchr(ep + 1, '/');
1313 }
1314
1315 out_buffer.size = strlen(LOCK_REQUEST) + strlen(git_default_email) - 2;
1316 out_data = xmalloc(out_buffer.size + 1);
1317 snprintf(out_data, out_buffer.size + 1, LOCK_REQUEST, git_default_email);
1318 out_buffer.posn = 0;
1319 out_buffer.buffer = out_data;
1320
1321 in_buffer.size = 4096;
1322 in_data = xmalloc(in_buffer.size);
1323 in_buffer.posn = 0;
1324 in_buffer.buffer = in_data;
1325
1326 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1327 dav_headers = curl_slist_append(dav_headers, timeout_header);
1328 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1329
1330 slot = get_active_slot();
1331 slot->results = &results;
1332 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1333 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1334 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1335 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1336 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1337 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1338 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1339 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1340 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1341
1342 lock = xcalloc(1, sizeof(*lock));
1343 lock->timeout = -1;
1344
1345 if (start_active_slot(slot)) {
1346 run_active_slot(slot);
1347 if (results.curl_result == CURLE_OK) {
1348 ctx.name = xcalloc(10, 1);
1349 ctx.len = 0;
1350 ctx.cdata = NULL;
1351 ctx.userFunc = handle_new_lock_ctx;
1352 ctx.userData = lock;
1353 XML_SetUserData(parser, &ctx);
1354 XML_SetElementHandler(parser, xml_start_tag,
1355 xml_end_tag);
1356 XML_SetCharacterDataHandler(parser, xml_cdata);
1357 result = XML_Parse(parser, in_buffer.buffer,
1358 in_buffer.posn, 1);
1359 free(ctx.name);
1360 if (result != XML_STATUS_OK) {
1361 fprintf(stderr, "XML error: %s\n",
1362 XML_ErrorString(
1363 XML_GetErrorCode(parser)));
1364 lock->timeout = -1;
1365 }
1366 }
1367 } else {
1368 fprintf(stderr, "Unable to start LOCK request\n");
1369 }
1370
1371 curl_slist_free_all(dav_headers);
1372 free(out_data);
1373 free(in_data);
1374
1375 if (lock->token == NULL || lock->timeout <= 0) {
1376 if (lock->token != NULL)
1377 free(lock->token);
1378 if (lock->owner != NULL)
1379 free(lock->owner);
1380 free(url);
1381 free(lock);
1382 lock = NULL;
1383 } else {
1384 lock->url = url;
1385 lock->start_time = time(NULL);
1386 lock->next = remote->locks;
1387 remote->locks = lock;
1388 }
1389
1390 return lock;
1391 }
1392
1393 static int unlock_remote(struct remote_lock *lock)
1394 {
1395 struct active_request_slot *slot;
1396 struct slot_results results;
1397 struct remote_lock *prev = remote->locks;
1398 char *lock_token_header;
1399 struct curl_slist *dav_headers = NULL;
1400 int rc = 0;
1401
1402 lock_token_header = xmalloc(strlen(lock->token) + 31);
1403 sprintf(lock_token_header, "Lock-Token: <opaquelocktoken:%s>",
1404 lock->token);
1405 dav_headers = curl_slist_append(dav_headers, lock_token_header);
1406
1407 slot = get_active_slot();
1408 slot->results = &results;
1409 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1410 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1411 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1412 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1413
1414 if (start_active_slot(slot)) {
1415 run_active_slot(slot);
1416 if (results.curl_result == CURLE_OK)
1417 rc = 1;
1418 else
1419 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1420 results.http_code);
1421 } else {
1422 fprintf(stderr, "Unable to start UNLOCK request\n");
1423 }
1424
1425 curl_slist_free_all(dav_headers);
1426 free(lock_token_header);
1427
1428 if (remote->locks == lock) {
1429 remote->locks = lock->next;
1430 } else {
1431 while (prev && prev->next != lock)
1432 prev = prev->next;
1433 if (prev)
1434 prev->next = prev->next->next;
1435 }
1436
1437 if (lock->owner != NULL)
1438 free(lock->owner);
1439 free(lock->url);
1440 free(lock->token);
1441 free(lock);
1442
1443 return rc;
1444 }
1445
1446 static void remote_ls(const char *path, int flags,
1447 void (*userFunc)(struct remote_ls_ctx *ls),
1448 void *userData);
1449
1450 static void process_ls_object(struct remote_ls_ctx *ls)
1451 {
1452 unsigned int *parent = (unsigned int *)ls->userData;
1453 char *path = ls->dentry_name;
1454 char *obj_hex;
1455
1456 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1457 remote_dir_exists[*parent] = 1;
1458 return;
1459 }
1460
1461 if (strlen(path) != 49)
1462 return;
1463 path += 8;
1464 obj_hex = xmalloc(strlen(path));
1465 /* NB: path is not null-terminated, can not use strlcpy here */
1466 memcpy(obj_hex, path, 2);
1467 strcpy(obj_hex + 2, path + 3);
1468 one_remote_object(obj_hex);
1469 free(obj_hex);
1470 }
1471
1472 static void process_ls_ref(struct remote_ls_ctx *ls)
1473 {
1474 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1475 fprintf(stderr, " %s\n", ls->dentry_name);
1476 return;
1477 }
1478
1479 if (!(ls->dentry_flags & IS_DIR))
1480 one_remote_ref(ls->dentry_name);
1481 }
1482
1483 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1484 {
1485 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1486
1487 if (tag_closed) {
1488 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1489 if (ls->dentry_flags & IS_DIR) {
1490 if (ls->flags & PROCESS_DIRS) {
1491 ls->userFunc(ls);
1492 }
1493 if (strcmp(ls->dentry_name, ls->path) &&
1494 ls->flags & RECURSIVE) {
1495 remote_ls(ls->dentry_name,
1496 ls->flags,
1497 ls->userFunc,
1498 ls->userData);
1499 }
1500 } else if (ls->flags & PROCESS_FILES) {
1501 ls->userFunc(ls);
1502 }
1503 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1504 ls->dentry_name = xmalloc(strlen(ctx->cdata) -
1505 remote->path_len + 1);
1506 strcpy(ls->dentry_name, ctx->cdata + remote->path_len);
1507 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1508 ls->dentry_flags |= IS_DIR;
1509 }
1510 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1511 free(ls->dentry_name);
1512 ls->dentry_name = NULL;
1513 ls->dentry_flags = 0;
1514 }
1515 }
1516
1517 static void remote_ls(const char *path, int flags,
1518 void (*userFunc)(struct remote_ls_ctx *ls),
1519 void *userData)
1520 {
1521 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1522 struct active_request_slot *slot;
1523 struct slot_results results;
1524 struct buffer in_buffer;
1525 struct buffer out_buffer;
1526 char *in_data;
1527 char *out_data;
1528 XML_Parser parser = XML_ParserCreate(NULL);
1529 enum XML_Status result;
1530 struct curl_slist *dav_headers = NULL;
1531 struct xml_ctx ctx;
1532 struct remote_ls_ctx ls;
1533
1534 ls.flags = flags;
1535 ls.path = xstrdup(path);
1536 ls.dentry_name = NULL;
1537 ls.dentry_flags = 0;
1538 ls.userData = userData;
1539 ls.userFunc = userFunc;
1540
1541 sprintf(url, "%s%s", remote->url, path);
1542
1543 out_buffer.size = strlen(PROPFIND_ALL_REQUEST);
1544 out_data = xmalloc(out_buffer.size + 1);
1545 snprintf(out_data, out_buffer.size + 1, PROPFIND_ALL_REQUEST);
1546 out_buffer.posn = 0;
1547 out_buffer.buffer = out_data;
1548
1549 in_buffer.size = 4096;
1550 in_data = xmalloc(in_buffer.size);
1551 in_buffer.posn = 0;
1552 in_buffer.buffer = in_data;
1553
1554 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1555 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1556
1557 slot = get_active_slot();
1558 slot->results = &results;
1559 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1560 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1561 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1562 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1563 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1564 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1565 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1566 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1567 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1568
1569 if (start_active_slot(slot)) {
1570 run_active_slot(slot);
1571 if (results.curl_result == CURLE_OK) {
1572 ctx.name = xcalloc(10, 1);
1573 ctx.len = 0;
1574 ctx.cdata = NULL;
1575 ctx.userFunc = handle_remote_ls_ctx;
1576 ctx.userData = &ls;
1577 XML_SetUserData(parser, &ctx);
1578 XML_SetElementHandler(parser, xml_start_tag,
1579 xml_end_tag);
1580 XML_SetCharacterDataHandler(parser, xml_cdata);
1581 result = XML_Parse(parser, in_buffer.buffer,
1582 in_buffer.posn, 1);
1583 free(ctx.name);
1584
1585 if (result != XML_STATUS_OK) {
1586 fprintf(stderr, "XML error: %s\n",
1587 XML_ErrorString(
1588 XML_GetErrorCode(parser)));
1589 }
1590 }
1591 } else {
1592 fprintf(stderr, "Unable to start PROPFIND request\n");
1593 }
1594
1595 free(ls.path);
1596 free(url);
1597 free(out_data);
1598 free(in_buffer.buffer);
1599 curl_slist_free_all(dav_headers);
1600 }
1601
1602 static void get_remote_object_list(unsigned char parent)
1603 {
1604 char path[] = "objects/XX/";
1605 static const char hex[] = "0123456789abcdef";
1606 unsigned int val = parent;
1607
1608 path[8] = hex[val >> 4];
1609 path[9] = hex[val & 0xf];
1610 remote_dir_exists[val] = 0;
1611 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1612 process_ls_object, &val);
1613 }
1614
1615 static int locking_available(void)
1616 {
1617 struct active_request_slot *slot;
1618 struct slot_results results;
1619 struct buffer in_buffer;
1620 struct buffer out_buffer;
1621 char *in_data;
1622 char *out_data;
1623 XML_Parser parser = XML_ParserCreate(NULL);
1624 enum XML_Status result;
1625 struct curl_slist *dav_headers = NULL;
1626 struct xml_ctx ctx;
1627 int lock_flags = 0;
1628
1629 out_buffer.size =
1630 strlen(PROPFIND_SUPPORTEDLOCK_REQUEST) +
1631 strlen(remote->url) - 2;
1632 out_data = xmalloc(out_buffer.size + 1);
1633 snprintf(out_data, out_buffer.size + 1,
1634 PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1635 out_buffer.posn = 0;
1636 out_buffer.buffer = out_data;
1637
1638 in_buffer.size = 4096;
1639 in_data = xmalloc(in_buffer.size);
1640 in_buffer.posn = 0;
1641 in_buffer.buffer = in_data;
1642
1643 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1644 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1645
1646 slot = get_active_slot();
1647 slot->results = &results;
1648 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1649 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1650 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1651 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1652 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1653 curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1654 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1655 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1656 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1657
1658 if (start_active_slot(slot)) {
1659 run_active_slot(slot);
1660 if (results.curl_result == CURLE_OK) {
1661 ctx.name = xcalloc(10, 1);
1662 ctx.len = 0;
1663 ctx.cdata = NULL;
1664 ctx.userFunc = handle_lockprop_ctx;
1665 ctx.userData = &lock_flags;
1666 XML_SetUserData(parser, &ctx);
1667 XML_SetElementHandler(parser, xml_start_tag,
1668 xml_end_tag);
1669 result = XML_Parse(parser, in_buffer.buffer,
1670 in_buffer.posn, 1);
1671 free(ctx.name);
1672
1673 if (result != XML_STATUS_OK) {
1674 fprintf(stderr, "XML error: %s\n",
1675 XML_ErrorString(
1676 XML_GetErrorCode(parser)));
1677 lock_flags = 0;
1678 }
1679 }
1680 } else {
1681 fprintf(stderr, "Unable to start PROPFIND request\n");
1682 }
1683
1684 free(out_data);
1685 free(in_buffer.buffer);
1686 curl_slist_free_all(dav_headers);
1687
1688 return lock_flags;
1689 }
1690
1691 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1692 {
1693 struct object_list *entry = xmalloc(sizeof(struct object_list));
1694 entry->item = obj;
1695 entry->next = *p;
1696 *p = entry;
1697 return &entry->next;
1698 }
1699
1700 static struct object_list **process_blob(struct blob *blob,
1701 struct object_list **p,
1702 struct name_path *path,
1703 const char *name)
1704 {
1705 struct object *obj = &blob->object;
1706
1707 obj->flags |= LOCAL;
1708
1709 if (obj->flags & (UNINTERESTING | SEEN))
1710 return p;
1711
1712 obj->flags |= SEEN;
1713 return add_one_object(obj, p);
1714 }
1715
1716 static struct object_list **process_tree(struct tree *tree,
1717 struct object_list **p,
1718 struct name_path *path,
1719 const char *name)
1720 {
1721 struct object *obj = &tree->object;
1722 struct tree_desc desc;
1723 struct name_entry entry;
1724 struct name_path me;
1725
1726 obj->flags |= LOCAL;
1727
1728 if (obj->flags & (UNINTERESTING | SEEN))
1729 return p;
1730 if (parse_tree(tree) < 0)
1731 die("bad tree object %s", sha1_to_hex(obj->sha1));
1732
1733 obj->flags |= SEEN;
1734 name = xstrdup(name);
1735 p = add_one_object(obj, p);
1736 me.up = path;
1737 me.elem = name;
1738 me.elem_len = strlen(name);
1739
1740 init_tree_desc(&desc, tree->buffer, tree->size);
1741
1742 while (tree_entry(&desc, &entry)) {
1743 if (S_ISDIR(entry.mode))
1744 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1745 else
1746 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1747 }
1748 free(tree->buffer);
1749 tree->buffer = NULL;
1750 return p;
1751 }
1752
1753 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1754 {
1755 int i;
1756 struct commit *commit;
1757 struct object_list **p = &objects;
1758 int count = 0;
1759
1760 while ((commit = get_revision(revs)) != NULL) {
1761 p = process_tree(commit->tree, p, NULL, "");
1762 commit->object.flags |= LOCAL;
1763 if (!(commit->object.flags & UNINTERESTING))
1764 count += add_send_request(&commit->object, lock);
1765 }
1766
1767 for (i = 0; i < revs->pending.nr; i++) {
1768 struct object_array_entry *entry = revs->pending.objects + i;
1769 struct object *obj = entry->item;
1770 const char *name = entry->name;
1771
1772 if (obj->flags & (UNINTERESTING | SEEN))
1773 continue;
1774 if (obj->type == OBJ_TAG) {
1775 obj->flags |= SEEN;
1776 p = add_one_object(obj, p);
1777 continue;
1778 }
1779 if (obj->type == OBJ_TREE) {
1780 p = process_tree((struct tree *)obj, p, NULL, name);
1781 continue;
1782 }
1783 if (obj->type == OBJ_BLOB) {
1784 p = process_blob((struct blob *)obj, p, NULL, name);
1785 continue;
1786 }
1787 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1788 }
1789
1790 while (objects) {
1791 if (!(objects->item->flags & UNINTERESTING))
1792 count += add_send_request(objects->item, lock);
1793 objects = objects->next;
1794 }
1795
1796 return count;
1797 }
1798
1799 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1800 {
1801 struct active_request_slot *slot;
1802 struct slot_results results;
1803 char *out_data;
1804 char *if_header;
1805 struct buffer out_buffer;
1806 struct curl_slist *dav_headers = NULL;
1807 int i;
1808
1809 if_header = xmalloc(strlen(lock->token) + 25);
1810 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1811 dav_headers = curl_slist_append(dav_headers, if_header);
1812
1813 out_buffer.size = 41;
1814 out_data = xmalloc(out_buffer.size + 1);
1815 i = snprintf(out_data, out_buffer.size + 1, "%s\n", sha1_to_hex(sha1));
1816 if (i != out_buffer.size) {
1817 fprintf(stderr, "Unable to initialize PUT request body\n");
1818 return 0;
1819 }
1820 out_buffer.posn = 0;
1821 out_buffer.buffer = out_data;
1822
1823 slot = get_active_slot();
1824 slot->results = &results;
1825 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1826 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1827 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1828 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1829 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1830 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1831 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1832 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1833 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1834
1835 if (start_active_slot(slot)) {
1836 run_active_slot(slot);
1837 free(out_data);
1838 free(if_header);
1839 if (results.curl_result != CURLE_OK) {
1840 fprintf(stderr,
1841 "PUT error: curl result=%d, HTTP code=%ld\n",
1842 results.curl_result, results.http_code);
1843 /* We should attempt recovery? */
1844 return 0;
1845 }
1846 } else {
1847 free(out_data);
1848 free(if_header);
1849 fprintf(stderr, "Unable to start PUT request\n");
1850 return 0;
1851 }
1852
1853 return 1;
1854 }
1855
1856 static struct ref *local_refs, **local_tail;
1857 static struct ref *remote_refs, **remote_tail;
1858
1859 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1860 {
1861 struct ref *ref;
1862 int len = strlen(refname) + 1;
1863 ref = xcalloc(1, sizeof(*ref) + len);
1864 hashcpy(ref->new_sha1, sha1);
1865 memcpy(ref->name, refname, len);
1866 *local_tail = ref;
1867 local_tail = &ref->next;
1868 return 0;
1869 }
1870
1871 static void one_remote_ref(char *refname)
1872 {
1873 struct ref *ref;
1874 unsigned char remote_sha1[20];
1875 struct object *obj;
1876 int len = strlen(refname) + 1;
1877
1878 if (fetch_ref(refname, remote_sha1) != 0) {
1879 fprintf(stderr,
1880 "Unable to fetch ref %s from %s\n",
1881 refname, remote->url);
1882 return;
1883 }
1884
1885 /*
1886 * Fetch a copy of the object if it doesn't exist locally - it
1887 * may be required for updating server info later.
1888 */
1889 if (remote->can_update_info_refs && !has_sha1_file(remote_sha1)) {
1890 obj = lookup_unknown_object(remote_sha1);
1891 if (obj) {
1892 fprintf(stderr, " fetch %s for %s\n",
1893 sha1_to_hex(remote_sha1), refname);
1894 add_fetch_request(obj);
1895 }
1896 }
1897
1898 ref = xcalloc(1, sizeof(*ref) + len);
1899 hashcpy(ref->old_sha1, remote_sha1);
1900 memcpy(ref->name, refname, len);
1901 *remote_tail = ref;
1902 remote_tail = &ref->next;
1903 }
1904
1905 static void get_local_heads(void)
1906 {
1907 local_tail = &local_refs;
1908 for_each_ref(one_local_ref, NULL);
1909 }
1910
1911 static void get_dav_remote_heads(void)
1912 {
1913 remote_tail = &remote_refs;
1914 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1915 }
1916
1917 static int is_zero_sha1(const unsigned char *sha1)
1918 {
1919 int i;
1920
1921 for (i = 0; i < 20; i++) {
1922 if (*sha1++)
1923 return 0;
1924 }
1925 return 1;
1926 }
1927
1928 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1929 {
1930 while (list) {
1931 struct commit_list *temp = list;
1932 temp->item->object.flags &= ~mark;
1933 list = temp->next;
1934 free(temp);
1935 }
1936 }
1937
1938 static int ref_newer(const unsigned char *new_sha1,
1939 const unsigned char *old_sha1)
1940 {
1941 struct object *o;
1942 struct commit *old, *new;
1943 struct commit_list *list, *used;
1944 int found = 0;
1945
1946 /* Both new and old must be commit-ish and new is descendant of
1947 * old. Otherwise we require --force.
1948 */
1949 o = deref_tag(parse_object(old_sha1), NULL, 0);
1950 if (!o || o->type != OBJ_COMMIT)
1951 return 0;
1952 old = (struct commit *) o;
1953
1954 o = deref_tag(parse_object(new_sha1), NULL, 0);
1955 if (!o || o->type != OBJ_COMMIT)
1956 return 0;
1957 new = (struct commit *) o;
1958
1959 if (parse_commit(new) < 0)
1960 return 0;
1961
1962 used = list = NULL;
1963 commit_list_insert(new, &list);
1964 while (list) {
1965 new = pop_most_recent_commit(&list, TMP_MARK);
1966 commit_list_insert(new, &used);
1967 if (new == old) {
1968 found = 1;
1969 break;
1970 }
1971 }
1972 unmark_and_free(list, TMP_MARK);
1973 unmark_and_free(used, TMP_MARK);
1974 return found;
1975 }
1976
1977 static void mark_edge_parents_uninteresting(struct commit *commit)
1978 {
1979 struct commit_list *parents;
1980
1981 for (parents = commit->parents; parents; parents = parents->next) {
1982 struct commit *parent = parents->item;
1983 if (!(parent->object.flags & UNINTERESTING))
1984 continue;
1985 mark_tree_uninteresting(parent->tree);
1986 }
1987 }
1988
1989 static void mark_edges_uninteresting(struct commit_list *list)
1990 {
1991 for ( ; list; list = list->next) {
1992 struct commit *commit = list->item;
1993
1994 if (commit->object.flags & UNINTERESTING) {
1995 mark_tree_uninteresting(commit->tree);
1996 continue;
1997 }
1998 mark_edge_parents_uninteresting(commit);
1999 }
2000 }
2001
2002 static void add_remote_info_ref(struct remote_ls_ctx *ls)
2003 {
2004 struct buffer *buf = (struct buffer *)ls->userData;
2005 unsigned char remote_sha1[20];
2006 struct object *o;
2007 int len;
2008 char *ref_info;
2009
2010 if (fetch_ref(ls->dentry_name, remote_sha1) != 0) {
2011 fprintf(stderr,
2012 "Unable to fetch ref %s from %s\n",
2013 ls->dentry_name, remote->url);
2014 aborted = 1;
2015 return;
2016 }
2017
2018 o = parse_object(remote_sha1);
2019 if (!o) {
2020 fprintf(stderr,
2021 "Unable to parse object %s for remote ref %s\n",
2022 sha1_to_hex(remote_sha1), ls->dentry_name);
2023 aborted = 1;
2024 return;
2025 }
2026
2027 len = strlen(ls->dentry_name) + 42;
2028 ref_info = xcalloc(len + 1, 1);
2029 sprintf(ref_info, "%s %s\n",
2030 sha1_to_hex(remote_sha1), ls->dentry_name);
2031 fwrite_buffer(ref_info, 1, len, buf);
2032 free(ref_info);
2033
2034 if (o->type == OBJ_TAG) {
2035 o = deref_tag(o, ls->dentry_name, 0);
2036 if (o) {
2037 len = strlen(ls->dentry_name) + 45;
2038 ref_info = xcalloc(len + 1, 1);
2039 sprintf(ref_info, "%s %s^{}\n",
2040 sha1_to_hex(o->sha1), ls->dentry_name);
2041 fwrite_buffer(ref_info, 1, len, buf);
2042 free(ref_info);
2043 }
2044 }
2045 }
2046
2047 static void update_remote_info_refs(struct remote_lock *lock)
2048 {
2049 struct buffer buffer;
2050 struct active_request_slot *slot;
2051 struct slot_results results;
2052 char *if_header;
2053 struct curl_slist *dav_headers = NULL;
2054
2055 buffer.buffer = xcalloc(1, 4096);
2056 buffer.size = 4096;
2057 buffer.posn = 0;
2058 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
2059 add_remote_info_ref, &buffer);
2060 if (!aborted) {
2061 if_header = xmalloc(strlen(lock->token) + 25);
2062 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
2063 dav_headers = curl_slist_append(dav_headers, if_header);
2064
2065 slot = get_active_slot();
2066 slot->results = &results;
2067 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
2068 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.posn);
2069 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
2070 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2071 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
2072 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
2073 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
2074 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
2075 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
2076
2077 buffer.posn = 0;
2078
2079 if (start_active_slot(slot)) {
2080 run_active_slot(slot);
2081 if (results.curl_result != CURLE_OK) {
2082 fprintf(stderr,
2083 "PUT error: curl result=%d, HTTP code=%ld\n",
2084 results.curl_result, results.http_code);
2085 }
2086 }
2087 free(if_header);
2088 }
2089 free(buffer.buffer);
2090 }
2091
2092 static int remote_exists(const char *path)
2093 {
2094 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2095 struct active_request_slot *slot;
2096 struct slot_results results;
2097
2098 sprintf(url, "%s%s", remote->url, path);
2099
2100 slot = get_active_slot();
2101 slot->results = &results;
2102 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2103 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
2104
2105 if (start_active_slot(slot)) {
2106 run_active_slot(slot);
2107 if (results.http_code == 404)
2108 return 0;
2109 else if (results.curl_result == CURLE_OK)
2110 return 1;
2111 else
2112 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2113 } else {
2114 fprintf(stderr, "Unable to start HEAD request\n");
2115 }
2116
2117 return -1;
2118 }
2119
2120 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2121 {
2122 char *url;
2123 struct buffer buffer;
2124 struct active_request_slot *slot;
2125 struct slot_results results;
2126
2127 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2128 sprintf(url, "%s%s", remote->url, path);
2129
2130 buffer.size = 4096;
2131 buffer.posn = 0;
2132 buffer.buffer = xmalloc(buffer.size);
2133
2134 slot = get_active_slot();
2135 slot->results = &results;
2136 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2137 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2138 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2139 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2140 if (start_active_slot(slot)) {
2141 run_active_slot(slot);
2142 if (results.curl_result != CURLE_OK) {
2143 die("Couldn't get %s for remote symref\n%s",
2144 url, curl_errorstr);
2145 }
2146 } else {
2147 die("Unable to start remote symref request");
2148 }
2149 free(url);
2150
2151 if (*symref != NULL)
2152 free(*symref);
2153 *symref = NULL;
2154 hashclr(sha1);
2155
2156 if (buffer.posn == 0)
2157 return;
2158
2159 /* If it's a symref, set the refname; otherwise try for a sha1 */
2160 if (!prefixcmp((char *)buffer.buffer, "ref: ")) {
2161 *symref = xmemdupz((char *)buffer.buffer + 5, buffer.posn - 6);
2162 } else {
2163 get_sha1_hex(buffer.buffer, sha1);
2164 }
2165
2166 free(buffer.buffer);
2167 }
2168
2169 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2170 {
2171 struct commit *head = lookup_commit(head_sha1);
2172 struct commit *branch = lookup_commit(branch_sha1);
2173 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2174
2175 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2176 }
2177
2178 static int delete_remote_branch(char *pattern, int force)
2179 {
2180 struct ref *refs = remote_refs;
2181 struct ref *remote_ref = NULL;
2182 unsigned char head_sha1[20];
2183 char *symref = NULL;
2184 int match;
2185 int patlen = strlen(pattern);
2186 int i;
2187 struct active_request_slot *slot;
2188 struct slot_results results;
2189 char *url;
2190
2191 /* Find the remote branch(es) matching the specified branch name */
2192 for (match = 0; refs; refs = refs->next) {
2193 char *name = refs->name;
2194 int namelen = strlen(name);
2195 if (namelen < patlen ||
2196 memcmp(name + namelen - patlen, pattern, patlen))
2197 continue;
2198 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2199 continue;
2200 match++;
2201 remote_ref = refs;
2202 }
2203 if (match == 0)
2204 return error("No remote branch matches %s", pattern);
2205 if (match != 1)
2206 return error("More than one remote branch matches %s",
2207 pattern);
2208
2209 /*
2210 * Remote HEAD must be a symref (not exactly foolproof; a remote
2211 * symlink to a symref will look like a symref)
2212 */
2213 fetch_symref("HEAD", &symref, head_sha1);
2214 if (!symref)
2215 return error("Remote HEAD is not a symref");
2216
2217 /* Remote branch must not be the remote HEAD */
2218 for (i=0; symref && i<MAXDEPTH; i++) {
2219 if (!strcmp(remote_ref->name, symref))
2220 return error("Remote branch %s is the current HEAD",
2221 remote_ref->name);
2222 fetch_symref(symref, &symref, head_sha1);
2223 }
2224
2225 /* Run extra sanity checks if delete is not forced */
2226 if (!force) {
2227 /* Remote HEAD must resolve to a known object */
2228 if (symref)
2229 return error("Remote HEAD symrefs too deep");
2230 if (is_zero_sha1(head_sha1))
2231 return error("Unable to resolve remote HEAD");
2232 if (!has_sha1_file(head_sha1))
2233 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2234
2235 /* Remote branch must resolve to a known object */
2236 if (is_zero_sha1(remote_ref->old_sha1))
2237 return error("Unable to resolve remote branch %s",
2238 remote_ref->name);
2239 if (!has_sha1_file(remote_ref->old_sha1))
2240 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));
2241
2242 /* Remote branch must be an ancestor of remote HEAD */
2243 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2244 return error("The branch '%s' is not an ancestor "
2245 "of your current HEAD.\n"
2246 "If you are sure you want to delete it,"
2247 " run:\n\t'git http-push -D %s %s'",
2248 remote_ref->name, remote->url, pattern);
2249 }
2250 }
2251
2252 /* Send delete request */
2253 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2254 url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
2255 sprintf(url, "%s%s", remote->url, remote_ref->name);
2256 slot = get_active_slot();
2257 slot->results = &results;
2258 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2259 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2260 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2261 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2262 if (start_active_slot(slot)) {
2263 run_active_slot(slot);
2264 free(url);
2265 if (results.curl_result != CURLE_OK)
2266 return error("DELETE request failed (%d/%ld)\n",
2267 results.curl_result, results.http_code);
2268 } else {
2269 free(url);
2270 return error("Unable to start DELETE request");
2271 }
2272
2273 return 0;
2274 }
2275
2276 int main(int argc, char **argv)
2277 {
2278 struct transfer_request *request;
2279 struct transfer_request *next_request;
2280 int nr_refspec = 0;
2281 char **refspec = NULL;
2282 struct remote_lock *ref_lock = NULL;
2283 struct remote_lock *info_ref_lock = NULL;
2284 struct rev_info revs;
2285 int delete_branch = 0;
2286 int force_delete = 0;
2287 int objects_to_send;
2288 int rc = 0;
2289 int i;
2290 int new_refs;
2291 struct ref *ref;
2292
2293 setup_git_directory();
2294
2295 remote = xcalloc(sizeof(*remote), 1);
2296
2297 argv++;
2298 for (i = 1; i < argc; i++, argv++) {
2299 char *arg = *argv;
2300
2301 if (*arg == '-') {
2302 if (!strcmp(arg, "--all")) {
2303 push_all = MATCH_REFS_ALL;
2304 continue;
2305 }
2306 if (!strcmp(arg, "--force")) {
2307 force_all = 1;
2308 continue;
2309 }
2310 if (!strcmp(arg, "--dry-run")) {
2311 dry_run = 1;
2312 continue;
2313 }
2314 if (!strcmp(arg, "--verbose")) {
2315 push_verbosely = 1;
2316 continue;
2317 }
2318 if (!strcmp(arg, "-d")) {
2319 delete_branch = 1;
2320 continue;
2321 }
2322 if (!strcmp(arg, "-D")) {
2323 delete_branch = 1;
2324 force_delete = 1;
2325 continue;
2326 }
2327 }
2328 if (!remote->url) {
2329 char *path = strstr(arg, "//");
2330 remote->url = arg;
2331 if (path) {
2332 path = strchr(path+2, '/');
2333 if (path)
2334 remote->path_len = strlen(path);
2335 }
2336 continue;
2337 }
2338 refspec = argv;
2339 nr_refspec = argc - i;
2340 break;
2341 }
2342
2343 if (!remote->url)
2344 usage(http_push_usage);
2345
2346 if (delete_branch && nr_refspec != 1)
2347 die("You must specify only one branch name when deleting a remote branch");
2348
2349 memset(remote_dir_exists, -1, 256);
2350
2351 http_init();
2352
2353 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2354 default_headers = curl_slist_append(default_headers, "Range:");
2355 default_headers = curl_slist_append(default_headers, "Destination:");
2356 default_headers = curl_slist_append(default_headers, "If:");
2357 default_headers = curl_slist_append(default_headers,
2358 "Pragma: no-cache");
2359
2360 /* Verify DAV compliance/lock support */
2361 if (!locking_available()) {
2362 fprintf(stderr, "Error: no DAV locking support on remote repo %s\n", remote->url);
2363 rc = 1;
2364 goto cleanup;
2365 }
2366
2367 /* Check whether the remote has server info files */
2368 remote->can_update_info_refs = 0;
2369 remote->has_info_refs = remote_exists("info/refs");
2370 remote->has_info_packs = remote_exists("objects/info/packs");
2371 if (remote->has_info_refs) {
2372 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2373 if (info_ref_lock)
2374 remote->can_update_info_refs = 1;
2375 }
2376 if (remote->has_info_packs)
2377 fetch_indices();
2378
2379 /* Get a list of all local and remote heads to validate refspecs */
2380 get_local_heads();
2381 fprintf(stderr, "Fetching remote heads...\n");
2382 get_dav_remote_heads();
2383
2384 /* Remove a remote branch if -d or -D was specified */
2385 if (delete_branch) {
2386 if (delete_remote_branch(refspec[0], force_delete) == -1)
2387 fprintf(stderr, "Unable to delete remote branch %s\n",
2388 refspec[0]);
2389 goto cleanup;
2390 }
2391
2392 /* match them up */
2393 if (!remote_tail)
2394 remote_tail = &remote_refs;
2395 if (match_refs(local_refs, remote_refs, &remote_tail,
2396 nr_refspec, (const char **) refspec, push_all))
2397 return -1;
2398 if (!remote_refs) {
2399 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2400 return 0;
2401 }
2402
2403 new_refs = 0;
2404 for (ref = remote_refs; ref; ref = ref->next) {
2405 char old_hex[60], *new_hex;
2406 const char *commit_argv[4];
2407 int commit_argc;
2408 char *new_sha1_hex, *old_sha1_hex;
2409
2410 if (!ref->peer_ref)
2411 continue;
2412 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2413 if (push_verbosely || 1)
2414 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2415 continue;
2416 }
2417
2418 if (!force_all &&
2419 !is_zero_sha1(ref->old_sha1) &&
2420 !ref->force) {
2421 if (!has_sha1_file(ref->old_sha1) ||
2422 !ref_newer(ref->peer_ref->new_sha1,
2423 ref->old_sha1)) {
2424 /*
2425 * We do not have the remote ref, or
2426 * we know that the remote ref is not
2427 * an ancestor of what we are trying to
2428 * push. Either way this can be losing
2429 * commits at the remote end and likely
2430 * we were not up to date to begin with.
2431 */
2432 error("remote '%s' is not an ancestor of\n"
2433 "local '%s'.\n"
2434 "Maybe you are not up-to-date and "
2435 "need to pull first?",
2436 ref->name,
2437 ref->peer_ref->name);
2438 rc = -2;
2439 continue;
2440 }
2441 }
2442 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2443 if (is_zero_sha1(ref->new_sha1)) {
2444 error("cannot happen anymore");
2445 rc = -3;
2446 continue;
2447 }
2448 new_refs++;
2449 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2450 new_hex = sha1_to_hex(ref->new_sha1);
2451
2452 fprintf(stderr, "updating '%s'", ref->name);
2453 if (strcmp(ref->name, ref->peer_ref->name))
2454 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2455 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2456 if (dry_run)
2457 continue;
2458
2459 /* Lock remote branch ref */
2460 ref_lock = lock_remote(ref->name, LOCK_TIME);
2461 if (ref_lock == NULL) {
2462 fprintf(stderr, "Unable to lock remote branch %s\n",
2463 ref->name);
2464 rc = 1;
2465 continue;
2466 }
2467
2468 /* Set up revision info for this refspec */
2469 commit_argc = 3;
2470 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2471 old_sha1_hex = NULL;
2472 commit_argv[1] = "--objects";
2473 commit_argv[2] = new_sha1_hex;
2474 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2475 old_sha1_hex = xmalloc(42);
2476 sprintf(old_sha1_hex, "^%s",
2477 sha1_to_hex(ref->old_sha1));
2478 commit_argv[3] = old_sha1_hex;
2479 commit_argc++;
2480 }
2481 init_revisions(&revs, setup_git_directory());
2482 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2483 free(new_sha1_hex);
2484 if (old_sha1_hex) {
2485 free(old_sha1_hex);
2486 commit_argv[1] = NULL;
2487 }
2488
2489 /* Generate a list of objects that need to be pushed */
2490 pushing = 0;
2491 prepare_revision_walk(&revs);
2492 mark_edges_uninteresting(revs.commits);
2493 objects_to_send = get_delta(&revs, ref_lock);
2494 finish_all_active_slots();
2495
2496 /* Push missing objects to remote, this would be a
2497 convenient time to pack them first if appropriate. */
2498 pushing = 1;
2499 if (objects_to_send)
2500 fprintf(stderr, " sending %d objects\n",
2501 objects_to_send);
2502 #ifdef USE_CURL_MULTI
2503 fill_active_slots();
2504 add_fill_function(NULL, fill_active_slot);
2505 #endif
2506 finish_all_active_slots();
2507
2508 /* Update the remote branch if all went well */
2509 if (aborted || !update_remote(ref->new_sha1, ref_lock)) {
2510 rc = 1;
2511 goto unlock;
2512 }
2513
2514 unlock:
2515 if (!rc)
2516 fprintf(stderr, " done\n");
2517 unlock_remote(ref_lock);
2518 check_locks();
2519 }
2520
2521 /* Update remote server info if appropriate */
2522 if (remote->has_info_refs && new_refs) {
2523 if (info_ref_lock && remote->can_update_info_refs) {
2524 fprintf(stderr, "Updating remote server info\n");
2525 if (!dry_run)
2526 update_remote_info_refs(info_ref_lock);
2527 } else {
2528 fprintf(stderr, "Unable to update server info\n");
2529 }
2530 }
2531 if (info_ref_lock)
2532 unlock_remote(info_ref_lock);
2533
2534 cleanup:
2535 free(remote);
2536
2537 curl_slist_free_all(no_pragma_header);
2538 curl_slist_free_all(default_headers);
2539
2540 http_cleanup();
2541
2542 request = request_queue_head;
2543 while (request != NULL) {
2544 next_request = request->next;
2545 release_request(request);
2546 request = next_request;
2547 }
2548
2549 return rc;
2550 }
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