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pager: do wait_for_pager on signal death
[alt-git.git] / http-push.c
blob7d5c23edc4b864958671a26bde64ce21e54924bc
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 #include "list-objects.h"
13 #include "sigchain.h"
14
15 #include <expat.h>
16
17 static const char http_push_usage[] =
18 "git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
19
20 #ifndef XML_STATUS_OK
21 enum XML_Status {
22 XML_STATUS_OK = 1,
23 XML_STATUS_ERROR = 0
24 };
25 #define XML_STATUS_OK 1
26 #define XML_STATUS_ERROR 0
27 #endif
28
29 #define PREV_BUF_SIZE 4096
30 #define RANGE_HEADER_SIZE 30
31
32 /* DAV methods */
33 #define DAV_LOCK "LOCK"
34 #define DAV_MKCOL "MKCOL"
35 #define DAV_MOVE "MOVE"
36 #define DAV_PROPFIND "PROPFIND"
37 #define DAV_PUT "PUT"
38 #define DAV_UNLOCK "UNLOCK"
39 #define DAV_DELETE "DELETE"
40
41 /* DAV lock flags */
42 #define DAV_PROP_LOCKWR (1u << 0)
43 #define DAV_PROP_LOCKEX (1u << 1)
44 #define DAV_LOCK_OK (1u << 2)
45
46 /* DAV XML properties */
47 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
48 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
49 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
50 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
51 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
52 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
53 #define DAV_PROPFIND_RESP ".multistatus.response"
54 #define DAV_PROPFIND_NAME ".multistatus.response.href"
55 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
56
57 /* DAV request body templates */
58 #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>"
59 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
60 #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>"
61
62 #define LOCK_TIME 600
63 #define LOCK_REFRESH 30
64
65 /* bits #0-15 in revision.h */
66
67 #define LOCAL (1u<<16)
68 #define REMOTE (1u<<17)
69 #define FETCHING (1u<<18)
70 #define PUSHING (1u<<19)
71
72 /* We allow "recursive" symbolic refs. Only within reason, though */
73 #define MAXDEPTH 5
74
75 static int pushing;
76 static int aborted;
77 static signed char remote_dir_exists[256];
78
79 static struct curl_slist *no_pragma_header;
80
81 static int push_verbosely;
82 static int push_all = MATCH_REFS_NONE;
83 static int force_all;
84 static int dry_run;
85
86 static struct object_list *objects;
87
88 struct repo
89 {
90 char *url;
91 char *path;
92 int path_len;
93 int has_info_refs;
94 int can_update_info_refs;
95 int has_info_packs;
96 struct packed_git *packs;
97 struct remote_lock *locks;
98 };
99
100 static struct repo *remote;
101
102 enum transfer_state {
103 NEED_FETCH,
104 RUN_FETCH_LOOSE,
105 RUN_FETCH_PACKED,
106 NEED_PUSH,
107 RUN_MKCOL,
108 RUN_PUT,
109 RUN_MOVE,
110 ABORTED,
111 COMPLETE,
112 };
113
114 struct transfer_request
115 {
116 struct object *obj;
117 char *url;
118 char *dest;
119 struct remote_lock *lock;
120 struct curl_slist *headers;
121 struct buffer buffer;
122 char filename[PATH_MAX];
123 char tmpfile[PATH_MAX];
124 int local_fileno;
125 FILE *local_stream;
126 enum transfer_state state;
127 CURLcode curl_result;
128 char errorstr[CURL_ERROR_SIZE];
129 long http_code;
130 unsigned char real_sha1[20];
131 git_SHA_CTX c;
132 z_stream stream;
133 int zret;
134 int rename;
135 void *userData;
136 struct active_request_slot *slot;
137 struct transfer_request *next;
138 };
139
140 static struct transfer_request *request_queue_head;
141
142 struct xml_ctx
143 {
144 char *name;
145 int len;
146 char *cdata;
147 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
148 void *userData;
149 };
150
151 struct remote_lock
152 {
153 char *url;
154 char *owner;
155 char *token;
156 time_t start_time;
157 long timeout;
158 int refreshing;
159 struct remote_lock *next;
160 };
161
162 /* Flags that control remote_ls processing */
163 #define PROCESS_FILES (1u << 0)
164 #define PROCESS_DIRS (1u << 1)
165 #define RECURSIVE (1u << 2)
166
167 /* Flags that remote_ls passes to callback functions */
168 #define IS_DIR (1u << 0)
169
170 struct remote_ls_ctx
171 {
172 char *path;
173 void (*userFunc)(struct remote_ls_ctx *ls);
174 void *userData;
175 int flags;
176 char *dentry_name;
177 int dentry_flags;
178 struct remote_ls_ctx *parent;
179 };
180
181 static void finish_request(struct transfer_request *request);
182 static void release_request(struct transfer_request *request);
183
184 static void process_response(void *callback_data)
185 {
186 struct transfer_request *request =
187 (struct transfer_request *)callback_data;
188
189 finish_request(request);
190 }
191
192 #ifdef USE_CURL_MULTI
193 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
194 void *data)
195 {
196 unsigned char expn[4096];
197 size_t size = eltsize * nmemb;
198 int posn = 0;
199 struct transfer_request *request = (struct transfer_request *)data;
200 do {
201 ssize_t retval = xwrite(request->local_fileno,
202 (char *) ptr + posn, size - posn);
203 if (retval < 0)
204 return posn;
205 posn += retval;
206 } while (posn < size);
207
208 request->stream.avail_in = size;
209 request->stream.next_in = ptr;
210 do {
211 request->stream.next_out = expn;
212 request->stream.avail_out = sizeof(expn);
213 request->zret = inflate(&request->stream, Z_SYNC_FLUSH);
214 git_SHA1_Update(&request->c, expn,
215 sizeof(expn) - request->stream.avail_out);
216 } while (request->stream.avail_in && request->zret == Z_OK);
217 data_received++;
218 return size;
219 }
220
221 static void start_fetch_loose(struct transfer_request *request)
222 {
223 char *hex = sha1_to_hex(request->obj->sha1);
224 char *filename;
225 char prevfile[PATH_MAX];
226 char *url;
227 char *posn;
228 int prevlocal;
229 unsigned char prev_buf[PREV_BUF_SIZE];
230 ssize_t prev_read = 0;
231 long prev_posn = 0;
232 char range[RANGE_HEADER_SIZE];
233 struct curl_slist *range_header = NULL;
234 struct active_request_slot *slot;
235
236 filename = sha1_file_name(request->obj->sha1);
237 snprintf(request->filename, sizeof(request->filename), "%s", filename);
238 snprintf(request->tmpfile, sizeof(request->tmpfile),
239 "%s.temp", filename);
240
241 snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
242 unlink(prevfile);
243 rename(request->tmpfile, prevfile);
244 unlink(request->tmpfile);
245
246 if (request->local_fileno != -1)
247 error("fd leakage in start: %d", request->local_fileno);
248 request->local_fileno = open(request->tmpfile,
249 O_WRONLY | O_CREAT | O_EXCL, 0666);
250 /* This could have failed due to the "lazy directory creation";
251 * try to mkdir the last path component.
252 */
253 if (request->local_fileno < 0 && errno == ENOENT) {
254 char *dir = strrchr(request->tmpfile, '/');
255 if (dir) {
256 *dir = 0;
257 mkdir(request->tmpfile, 0777);
258 *dir = '/';
259 }
260 request->local_fileno = open(request->tmpfile,
261 O_WRONLY | O_CREAT | O_EXCL, 0666);
262 }
263
264 if (request->local_fileno < 0) {
265 request->state = ABORTED;
266 error("Couldn't create temporary file %s for %s: %s",
267 request->tmpfile, request->filename, strerror(errno));
268 return;
269 }
270
271 memset(&request->stream, 0, sizeof(request->stream));
272
273 inflateInit(&request->stream);
274
275 git_SHA1_Init(&request->c);
276
277 url = xmalloc(strlen(remote->url) + 50);
278 request->url = xmalloc(strlen(remote->url) + 50);
279 strcpy(url, remote->url);
280 posn = url + strlen(remote->url);
281 strcpy(posn, "objects/");
282 posn += 8;
283 memcpy(posn, hex, 2);
284 posn += 2;
285 *(posn++) = '/';
286 strcpy(posn, hex + 2);
287 strcpy(request->url, url);
288
289 /* If a previous temp file is present, process what was already
290 fetched. */
291 prevlocal = open(prevfile, O_RDONLY);
292 if (prevlocal != -1) {
293 do {
294 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
295 if (prev_read>0) {
296 if (fwrite_sha1_file(prev_buf,
297 1,
298 prev_read,
299 request) == prev_read) {
300 prev_posn += prev_read;
301 } else {
302 prev_read = -1;
303 }
304 }
305 } while (prev_read > 0);
306 close(prevlocal);
307 }
308 unlink(prevfile);
309
310 /* Reset inflate/SHA1 if there was an error reading the previous temp
311 file; also rewind to the beginning of the local file. */
312 if (prev_read == -1) {
313 memset(&request->stream, 0, sizeof(request->stream));
314 inflateInit(&request->stream);
315 git_SHA1_Init(&request->c);
316 if (prev_posn>0) {
317 prev_posn = 0;
318 lseek(request->local_fileno, 0, SEEK_SET);
319 ftruncate(request->local_fileno, 0);
320 }
321 }
322
323 slot = get_active_slot();
324 slot->callback_func = process_response;
325 slot->callback_data = request;
326 request->slot = slot;
327
328 curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
329 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
330 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
331 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
332 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
333
334 /* If we have successfully processed data from a previous fetch
335 attempt, only fetch the data we don't already have. */
336 if (prev_posn>0) {
337 if (push_verbosely)
338 fprintf(stderr,
339 "Resuming fetch of object %s at byte %ld\n",
340 hex, prev_posn);
341 sprintf(range, "Range: bytes=%ld-", prev_posn);
342 range_header = curl_slist_append(range_header, range);
343 curl_easy_setopt(slot->curl,
344 CURLOPT_HTTPHEADER, range_header);
345 }
346
347 /* Try to get the request started, abort the request on error */
348 request->state = RUN_FETCH_LOOSE;
349 if (!start_active_slot(slot)) {
350 fprintf(stderr, "Unable to start GET request\n");
351 remote->can_update_info_refs = 0;
352 release_request(request);
353 }
354 }
355
356 static void start_mkcol(struct transfer_request *request)
357 {
358 char *hex = sha1_to_hex(request->obj->sha1);
359 struct active_request_slot *slot;
360 char *posn;
361
362 request->url = xmalloc(strlen(remote->url) + 13);
363 strcpy(request->url, remote->url);
364 posn = request->url + strlen(remote->url);
365 strcpy(posn, "objects/");
366 posn += 8;
367 memcpy(posn, hex, 2);
368 posn += 2;
369 strcpy(posn, "/");
370
371 slot = get_active_slot();
372 slot->callback_func = process_response;
373 slot->callback_data = request;
374 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
375 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
376 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
377 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
378 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
379
380 if (start_active_slot(slot)) {
381 request->slot = slot;
382 request->state = RUN_MKCOL;
383 } else {
384 request->state = ABORTED;
385 free(request->url);
386 request->url = NULL;
387 }
388 }
389 #endif
390
391 static void start_fetch_packed(struct transfer_request *request)
392 {
393 char *url;
394 struct packed_git *target;
395 FILE *packfile;
396 char *filename;
397 long prev_posn = 0;
398 char range[RANGE_HEADER_SIZE];
399 struct curl_slist *range_header = NULL;
400
401 struct transfer_request *check_request = request_queue_head;
402 struct active_request_slot *slot;
403
404 target = find_sha1_pack(request->obj->sha1, remote->packs);
405 if (!target) {
406 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
407 remote->can_update_info_refs = 0;
408 release_request(request);
409 return;
410 }
411
412 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
413 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
414
415 filename = sha1_pack_name(target->sha1);
416 snprintf(request->filename, sizeof(request->filename), "%s", filename);
417 snprintf(request->tmpfile, sizeof(request->tmpfile),
418 "%s.temp", filename);
419
420 url = xmalloc(strlen(remote->url) + 64);
421 sprintf(url, "%sobjects/pack/pack-%s.pack",
422 remote->url, sha1_to_hex(target->sha1));
423
424 /* Make sure there isn't another open request for this pack */
425 while (check_request) {
426 if (check_request->state == RUN_FETCH_PACKED &&
427 !strcmp(check_request->url, url)) {
428 free(url);
429 release_request(request);
430 return;
431 }
432 check_request = check_request->next;
433 }
434
435 packfile = fopen(request->tmpfile, "a");
436 if (!packfile) {
437 fprintf(stderr, "Unable to open local file %s for pack",
438 request->tmpfile);
439 remote->can_update_info_refs = 0;
440 free(url);
441 return;
442 }
443
444 slot = get_active_slot();
445 slot->callback_func = process_response;
446 slot->callback_data = request;
447 request->slot = slot;
448 request->local_stream = packfile;
449 request->userData = target;
450
451 request->url = url;
452 curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
453 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
454 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
455 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
456 slot->local = packfile;
457
458 /* If there is data present from a previous transfer attempt,
459 resume where it left off */
460 prev_posn = ftell(packfile);
461 if (prev_posn>0) {
462 if (push_verbosely)
463 fprintf(stderr,
464 "Resuming fetch of pack %s at byte %ld\n",
465 sha1_to_hex(target->sha1), prev_posn);
466 sprintf(range, "Range: bytes=%ld-", prev_posn);
467 range_header = curl_slist_append(range_header, range);
468 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
469 }
470
471 /* Try to get the request started, abort the request on error */
472 request->state = RUN_FETCH_PACKED;
473 if (!start_active_slot(slot)) {
474 fprintf(stderr, "Unable to start GET request\n");
475 remote->can_update_info_refs = 0;
476 release_request(request);
477 }
478 }
479
480 static void start_put(struct transfer_request *request)
481 {
482 char *hex = sha1_to_hex(request->obj->sha1);
483 struct active_request_slot *slot;
484 char *posn;
485 enum object_type type;
486 char hdr[50];
487 void *unpacked;
488 unsigned long len;
489 int hdrlen;
490 ssize_t size;
491 z_stream stream;
492
493 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
494 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
495
496 /* Set it up */
497 memset(&stream, 0, sizeof(stream));
498 deflateInit(&stream, zlib_compression_level);
499 size = deflateBound(&stream, len + hdrlen);
500 strbuf_init(&request->buffer.buf, size);
501 request->buffer.posn = 0;
502
503 /* Compress it */
504 stream.next_out = (unsigned char *)request->buffer.buf.buf;
505 stream.avail_out = size;
506
507 /* First header.. */
508 stream.next_in = (void *)hdr;
509 stream.avail_in = hdrlen;
510 while (deflate(&stream, 0) == Z_OK)
511 /* nothing */;
512
513 /* Then the data itself.. */
514 stream.next_in = unpacked;
515 stream.avail_in = len;
516 while (deflate(&stream, Z_FINISH) == Z_OK)
517 /* nothing */;
518 deflateEnd(&stream);
519 free(unpacked);
520
521 request->buffer.buf.len = stream.total_out;
522
523 request->url = xmalloc(strlen(remote->url) +
524 strlen(request->lock->token) + 51);
525 strcpy(request->url, remote->url);
526 posn = request->url + strlen(remote->url);
527 strcpy(posn, "objects/");
528 posn += 8;
529 memcpy(posn, hex, 2);
530 posn += 2;
531 *(posn++) = '/';
532 strcpy(posn, hex + 2);
533 request->dest = xmalloc(strlen(request->url) + 14);
534 sprintf(request->dest, "Destination: %s", request->url);
535 posn += 38;
536 *(posn++) = '_';
537 strcpy(posn, request->lock->token);
538
539 slot = get_active_slot();
540 slot->callback_func = process_response;
541 slot->callback_data = request;
542 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
543 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.buf.len);
544 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
545 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
546 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
547 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
548 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
549 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
550 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
551
552 if (start_active_slot(slot)) {
553 request->slot = slot;
554 request->state = RUN_PUT;
555 } else {
556 request->state = ABORTED;
557 free(request->url);
558 request->url = NULL;
559 }
560 }
561
562 static void start_move(struct transfer_request *request)
563 {
564 struct active_request_slot *slot;
565 struct curl_slist *dav_headers = NULL;
566
567 slot = get_active_slot();
568 slot->callback_func = process_response;
569 slot->callback_data = request;
570 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
571 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
572 dav_headers = curl_slist_append(dav_headers, request->dest);
573 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
574 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
575 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
576 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
577
578 if (start_active_slot(slot)) {
579 request->slot = slot;
580 request->state = RUN_MOVE;
581 } else {
582 request->state = ABORTED;
583 free(request->url);
584 request->url = NULL;
585 }
586 }
587
588 static int refresh_lock(struct remote_lock *lock)
589 {
590 struct active_request_slot *slot;
591 struct slot_results results;
592 char *if_header;
593 char timeout_header[25];
594 struct curl_slist *dav_headers = NULL;
595 int rc = 0;
596
597 lock->refreshing = 1;
598
599 if_header = xmalloc(strlen(lock->token) + 25);
600 sprintf(if_header, "If: (<%s>)", lock->token);
601 sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
602 dav_headers = curl_slist_append(dav_headers, if_header);
603 dav_headers = curl_slist_append(dav_headers, timeout_header);
604
605 slot = get_active_slot();
606 slot->results = &results;
607 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
608 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
609 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
610 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
611 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
612
613 if (start_active_slot(slot)) {
614 run_active_slot(slot);
615 if (results.curl_result != CURLE_OK) {
616 fprintf(stderr, "LOCK HTTP error %ld\n",
617 results.http_code);
618 } else {
619 lock->start_time = time(NULL);
620 rc = 1;
621 }
622 }
623
624 lock->refreshing = 0;
625 curl_slist_free_all(dav_headers);
626 free(if_header);
627
628 return rc;
629 }
630
631 static void check_locks(void)
632 {
633 struct remote_lock *lock = remote->locks;
634 time_t current_time = time(NULL);
635 int time_remaining;
636
637 while (lock) {
638 time_remaining = lock->start_time + lock->timeout -
639 current_time;
640 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
641 if (!refresh_lock(lock)) {
642 fprintf(stderr,
643 "Unable to refresh lock for %s\n",
644 lock->url);
645 aborted = 1;
646 return;
647 }
648 }
649 lock = lock->next;
650 }
651 }
652
653 static void release_request(struct transfer_request *request)
654 {
655 struct transfer_request *entry = request_queue_head;
656
657 if (request == request_queue_head) {
658 request_queue_head = request->next;
659 } else {
660 while (entry->next != NULL && entry->next != request)
661 entry = entry->next;
662 if (entry->next == request)
663 entry->next = entry->next->next;
664 }
665
666 if (request->local_fileno != -1)
667 close(request->local_fileno);
668 if (request->local_stream)
669 fclose(request->local_stream);
670 free(request->url);
671 free(request);
672 }
673
674 static void finish_request(struct transfer_request *request)
675 {
676 struct stat st;
677 struct packed_git *target;
678 struct packed_git **lst;
679
680 request->curl_result = request->slot->curl_result;
681 request->http_code = request->slot->http_code;
682 request->slot = NULL;
683
684 /* Keep locks active */
685 check_locks();
686
687 if (request->headers != NULL)
688 curl_slist_free_all(request->headers);
689
690 /* URL is reused for MOVE after PUT */
691 if (request->state != RUN_PUT) {
692 free(request->url);
693 request->url = NULL;
694 }
695
696 if (request->state == RUN_MKCOL) {
697 if (request->curl_result == CURLE_OK ||
698 request->http_code == 405) {
699 remote_dir_exists[request->obj->sha1[0]] = 1;
700 start_put(request);
701 } else {
702 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
703 sha1_to_hex(request->obj->sha1),
704 request->curl_result, request->http_code);
705 request->state = ABORTED;
706 aborted = 1;
707 }
708 } else if (request->state == RUN_PUT) {
709 if (request->curl_result == CURLE_OK) {
710 start_move(request);
711 } else {
712 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
713 sha1_to_hex(request->obj->sha1),
714 request->curl_result, request->http_code);
715 request->state = ABORTED;
716 aborted = 1;
717 }
718 } else if (request->state == RUN_MOVE) {
719 if (request->curl_result == CURLE_OK) {
720 if (push_verbosely)
721 fprintf(stderr, " sent %s\n",
722 sha1_to_hex(request->obj->sha1));
723 request->obj->flags |= REMOTE;
724 release_request(request);
725 } else {
726 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
727 sha1_to_hex(request->obj->sha1),
728 request->curl_result, request->http_code);
729 request->state = ABORTED;
730 aborted = 1;
731 }
732 } else if (request->state == RUN_FETCH_LOOSE) {
733 fchmod(request->local_fileno, 0444);
734 close(request->local_fileno); request->local_fileno = -1;
735
736 if (request->curl_result != CURLE_OK &&
737 request->http_code != 416) {
738 if (stat(request->tmpfile, &st) == 0) {
739 if (st.st_size == 0)
740 unlink(request->tmpfile);
741 }
742 } else {
743 if (request->http_code == 416)
744 fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
745
746 inflateEnd(&request->stream);
747 git_SHA1_Final(request->real_sha1, &request->c);
748 if (request->zret != Z_STREAM_END) {
749 unlink(request->tmpfile);
750 } else if (hashcmp(request->obj->sha1, request->real_sha1)) {
751 unlink(request->tmpfile);
752 } else {
753 request->rename =
754 move_temp_to_file(
755 request->tmpfile,
756 request->filename);
757 if (request->rename == 0) {
758 request->obj->flags |= (LOCAL | REMOTE);
759 }
760 }
761 }
762
763 /* Try fetching packed if necessary */
764 if (request->obj->flags & LOCAL)
765 release_request(request);
766 else
767 start_fetch_packed(request);
768
769 } else if (request->state == RUN_FETCH_PACKED) {
770 if (request->curl_result != CURLE_OK) {
771 fprintf(stderr, "Unable to get pack file %s\n%s",
772 request->url, curl_errorstr);
773 remote->can_update_info_refs = 0;
774 } else {
775 off_t pack_size = ftell(request->local_stream);
776
777 fclose(request->local_stream);
778 request->local_stream = NULL;
779 if (!move_temp_to_file(request->tmpfile,
780 request->filename)) {
781 target = (struct packed_git *)request->userData;
782 target->pack_size = pack_size;
783 lst = &remote->packs;
784 while (*lst != target)
785 lst = &((*lst)->next);
786 *lst = (*lst)->next;
787
788 if (!verify_pack(target))
789 install_packed_git(target);
790 else
791 remote->can_update_info_refs = 0;
792 }
793 }
794 release_request(request);
795 }
796 }
797
798 #ifdef USE_CURL_MULTI
799 static int fill_active_slot(void *unused)
800 {
801 struct transfer_request *request = request_queue_head;
802
803 if (aborted)
804 return 0;
805
806 for (request = request_queue_head; request; request = request->next) {
807 if (request->state == NEED_FETCH) {
808 start_fetch_loose(request);
809 return 1;
810 } else if (pushing && request->state == NEED_PUSH) {
811 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
812 start_put(request);
813 } else {
814 start_mkcol(request);
815 }
816 return 1;
817 }
818 }
819 return 0;
820 }
821 #endif
822
823 static void get_remote_object_list(unsigned char parent);
824
825 static void add_fetch_request(struct object *obj)
826 {
827 struct transfer_request *request;
828
829 check_locks();
830
831 /*
832 * Don't fetch the object if it's known to exist locally
833 * or is already in the request queue
834 */
835 if (remote_dir_exists[obj->sha1[0]] == -1)
836 get_remote_object_list(obj->sha1[0]);
837 if (obj->flags & (LOCAL | FETCHING))
838 return;
839
840 obj->flags |= FETCHING;
841 request = xmalloc(sizeof(*request));
842 request->obj = obj;
843 request->url = NULL;
844 request->lock = NULL;
845 request->headers = NULL;
846 request->local_fileno = -1;
847 request->local_stream = NULL;
848 request->state = NEED_FETCH;
849 request->next = request_queue_head;
850 request_queue_head = request;
851
852 #ifdef USE_CURL_MULTI
853 fill_active_slots();
854 step_active_slots();
855 #endif
856 }
857
858 static int add_send_request(struct object *obj, struct remote_lock *lock)
859 {
860 struct transfer_request *request = request_queue_head;
861 struct packed_git *target;
862
863 /* Keep locks active */
864 check_locks();
865
866 /*
867 * Don't push the object if it's known to exist on the remote
868 * or is already in the request queue
869 */
870 if (remote_dir_exists[obj->sha1[0]] == -1)
871 get_remote_object_list(obj->sha1[0]);
872 if (obj->flags & (REMOTE | PUSHING))
873 return 0;
874 target = find_sha1_pack(obj->sha1, remote->packs);
875 if (target) {
876 obj->flags |= REMOTE;
877 return 0;
878 }
879
880 obj->flags |= PUSHING;
881 request = xmalloc(sizeof(*request));
882 request->obj = obj;
883 request->url = NULL;
884 request->lock = lock;
885 request->headers = NULL;
886 request->local_fileno = -1;
887 request->local_stream = NULL;
888 request->state = NEED_PUSH;
889 request->next = request_queue_head;
890 request_queue_head = request;
891
892 #ifdef USE_CURL_MULTI
893 fill_active_slots();
894 step_active_slots();
895 #endif
896
897 return 1;
898 }
899
900 static int fetch_index(unsigned char *sha1)
901 {
902 char *hex = sha1_to_hex(sha1);
903 char *filename;
904 char *url;
905 char tmpfile[PATH_MAX];
906 long prev_posn = 0;
907 char range[RANGE_HEADER_SIZE];
908 struct curl_slist *range_header = NULL;
909
910 FILE *indexfile;
911 struct active_request_slot *slot;
912 struct slot_results results;
913
914 /* Don't use the index if the pack isn't there */
915 url = xmalloc(strlen(remote->url) + 64);
916 sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
917 slot = get_active_slot();
918 slot->results = &results;
919 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
920 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
921 if (start_active_slot(slot)) {
922 run_active_slot(slot);
923 if (results.curl_result != CURLE_OK) {
924 free(url);
925 return error("Unable to verify pack %s is available",
926 hex);
927 }
928 } else {
929 free(url);
930 return error("Unable to start request");
931 }
932
933 if (has_pack_index(sha1)) {
934 free(url);
935 return 0;
936 }
937
938 if (push_verbosely)
939 fprintf(stderr, "Getting index for pack %s\n", hex);
940
941 sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
942
943 filename = sha1_pack_index_name(sha1);
944 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
945 indexfile = fopen(tmpfile, "a");
946 if (!indexfile) {
947 free(url);
948 return error("Unable to open local file %s for pack index",
949 tmpfile);
950 }
951
952 slot = get_active_slot();
953 slot->results = &results;
954 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
955 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
956 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
957 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
958 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
959 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
960 slot->local = indexfile;
961
962 /* If there is data present from a previous transfer attempt,
963 resume where it left off */
964 prev_posn = ftell(indexfile);
965 if (prev_posn>0) {
966 if (push_verbosely)
967 fprintf(stderr,
968 "Resuming fetch of index for pack %s at byte %ld\n",
969 hex, prev_posn);
970 sprintf(range, "Range: bytes=%ld-", prev_posn);
971 range_header = curl_slist_append(range_header, range);
972 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
973 }
974
975 if (start_active_slot(slot)) {
976 run_active_slot(slot);
977 if (results.curl_result != CURLE_OK) {
978 free(url);
979 fclose(indexfile);
980 return error("Unable to get pack index %s\n%s", url,
981 curl_errorstr);
982 }
983 } else {
984 free(url);
985 fclose(indexfile);
986 return error("Unable to start request");
987 }
988
989 free(url);
990 fclose(indexfile);
991
992 return move_temp_to_file(tmpfile, filename);
993 }
994
995 static int setup_index(unsigned char *sha1)
996 {
997 struct packed_git *new_pack;
998
999 if (fetch_index(sha1))
1000 return -1;
1001
1002 new_pack = parse_pack_index(sha1);
1003 new_pack->next = remote->packs;
1004 remote->packs = new_pack;
1005 return 0;
1006 }
1007
1008 static int fetch_indices(void)
1009 {
1010 unsigned char sha1[20];
1011 char *url;
1012 struct strbuf buffer = STRBUF_INIT;
1013 char *data;
1014 int i = 0;
1015
1016 struct active_request_slot *slot;
1017 struct slot_results results;
1018
1019 if (push_verbosely)
1020 fprintf(stderr, "Getting pack list\n");
1021
1022 url = xmalloc(strlen(remote->url) + 20);
1023 sprintf(url, "%sobjects/info/packs", remote->url);
1024
1025 slot = get_active_slot();
1026 slot->results = &results;
1027 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1028 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1029 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1030 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1031 if (start_active_slot(slot)) {
1032 run_active_slot(slot);
1033 if (results.curl_result != CURLE_OK) {
1034 strbuf_release(&buffer);
1035 free(url);
1036 if (results.http_code == 404)
1037 return 0;
1038 else
1039 return error("%s", curl_errorstr);
1040 }
1041 } else {
1042 strbuf_release(&buffer);
1043 free(url);
1044 return error("Unable to start request");
1045 }
1046 free(url);
1047
1048 data = buffer.buf;
1049 while (i < buffer.len) {
1050 switch (data[i]) {
1051 case 'P':
1052 i++;
1053 if (i + 52 < buffer.len &&
1054 !prefixcmp(data + i, " pack-") &&
1055 !prefixcmp(data + i + 46, ".pack\n")) {
1056 get_sha1_hex(data + i + 6, sha1);
1057 setup_index(sha1);
1058 i += 51;
1059 break;
1060 }
1061 default:
1062 while (data[i] != '\n')
1063 i++;
1064 }
1065 i++;
1066 }
1067
1068 strbuf_release(&buffer);
1069 return 0;
1070 }
1071
1072 static void one_remote_object(const char *hex)
1073 {
1074 unsigned char sha1[20];
1075 struct object *obj;
1076
1077 if (get_sha1_hex(hex, sha1) != 0)
1078 return;
1079
1080 obj = lookup_object(sha1);
1081 if (!obj)
1082 obj = parse_object(sha1);
1083
1084 /* Ignore remote objects that don't exist locally */
1085 if (!obj)
1086 return;
1087
1088 obj->flags |= REMOTE;
1089 if (!object_list_contains(objects, obj))
1090 object_list_insert(obj, &objects);
1091 }
1092
1093 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1094 {
1095 int *lock_flags = (int *)ctx->userData;
1096
1097 if (tag_closed) {
1098 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1099 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1100 (*lock_flags & DAV_PROP_LOCKWR)) {
1101 *lock_flags |= DAV_LOCK_OK;
1102 }
1103 *lock_flags &= DAV_LOCK_OK;
1104 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1105 *lock_flags |= DAV_PROP_LOCKWR;
1106 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1107 *lock_flags |= DAV_PROP_LOCKEX;
1108 }
1109 }
1110 }
1111
1112 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1113 {
1114 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1115
1116 if (tag_closed && ctx->cdata) {
1117 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1118 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1119 strcpy(lock->owner, ctx->cdata);
1120 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1121 if (!prefixcmp(ctx->cdata, "Second-"))
1122 lock->timeout =
1123 strtol(ctx->cdata + 7, NULL, 10);
1124 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1125 lock->token = xmalloc(strlen(ctx->cdata) + 1);
1126 strcpy(lock->token, ctx->cdata);
1127 }
1128 }
1129 }
1130
1131 static void one_remote_ref(char *refname);
1132
1133 static void
1134 xml_start_tag(void *userData, const char *name, const char **atts)
1135 {
1136 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1137 const char *c = strchr(name, ':');
1138 int new_len;
1139
1140 if (c == NULL)
1141 c = name;
1142 else
1143 c++;
1144
1145 new_len = strlen(ctx->name) + strlen(c) + 2;
1146
1147 if (new_len > ctx->len) {
1148 ctx->name = xrealloc(ctx->name, new_len);
1149 ctx->len = new_len;
1150 }
1151 strcat(ctx->name, ".");
1152 strcat(ctx->name, c);
1153
1154 free(ctx->cdata);
1155 ctx->cdata = NULL;
1156
1157 ctx->userFunc(ctx, 0);
1158 }
1159
1160 static void
1161 xml_end_tag(void *userData, const char *name)
1162 {
1163 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1164 const char *c = strchr(name, ':');
1165 char *ep;
1166
1167 ctx->userFunc(ctx, 1);
1168
1169 if (c == NULL)
1170 c = name;
1171 else
1172 c++;
1173
1174 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1175 *ep = 0;
1176 }
1177
1178 static void
1179 xml_cdata(void *userData, const XML_Char *s, int len)
1180 {
1181 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1182 free(ctx->cdata);
1183 ctx->cdata = xmemdupz(s, len);
1184 }
1185
1186 static struct remote_lock *lock_remote(const char *path, long timeout)
1187 {
1188 struct active_request_slot *slot;
1189 struct slot_results results;
1190 struct buffer out_buffer = { STRBUF_INIT, 0 };
1191 struct strbuf in_buffer = STRBUF_INIT;
1192 char *url;
1193 char *ep;
1194 char timeout_header[25];
1195 struct remote_lock *lock = NULL;
1196 struct curl_slist *dav_headers = NULL;
1197 struct xml_ctx ctx;
1198
1199 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1200 sprintf(url, "%s%s", remote->url, path);
1201
1202 /* Make sure leading directories exist for the remote ref */
1203 ep = strchr(url + strlen(remote->url) + 1, '/');
1204 while (ep) {
1205 *ep = 0;
1206 slot = get_active_slot();
1207 slot->results = &results;
1208 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1209 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1210 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1211 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1212 if (start_active_slot(slot)) {
1213 run_active_slot(slot);
1214 if (results.curl_result != CURLE_OK &&
1215 results.http_code != 405) {
1216 fprintf(stderr,
1217 "Unable to create branch path %s\n",
1218 url);
1219 free(url);
1220 return NULL;
1221 }
1222 } else {
1223 fprintf(stderr, "Unable to start MKCOL request\n");
1224 free(url);
1225 return NULL;
1226 }
1227 *ep = '/';
1228 ep = strchr(ep + 1, '/');
1229 }
1230
1231 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, git_default_email);
1232
1233 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1234 dav_headers = curl_slist_append(dav_headers, timeout_header);
1235 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1236
1237 slot = get_active_slot();
1238 slot->results = &results;
1239 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1240 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1241 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1242 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1243 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1244 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1245 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1246 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1247 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1248
1249 lock = xcalloc(1, sizeof(*lock));
1250 lock->timeout = -1;
1251
1252 if (start_active_slot(slot)) {
1253 run_active_slot(slot);
1254 if (results.curl_result == CURLE_OK) {
1255 XML_Parser parser = XML_ParserCreate(NULL);
1256 enum XML_Status result;
1257 ctx.name = xcalloc(10, 1);
1258 ctx.len = 0;
1259 ctx.cdata = NULL;
1260 ctx.userFunc = handle_new_lock_ctx;
1261 ctx.userData = lock;
1262 XML_SetUserData(parser, &ctx);
1263 XML_SetElementHandler(parser, xml_start_tag,
1264 xml_end_tag);
1265 XML_SetCharacterDataHandler(parser, xml_cdata);
1266 result = XML_Parse(parser, in_buffer.buf,
1267 in_buffer.len, 1);
1268 free(ctx.name);
1269 if (result != XML_STATUS_OK) {
1270 fprintf(stderr, "XML error: %s\n",
1271 XML_ErrorString(
1272 XML_GetErrorCode(parser)));
1273 lock->timeout = -1;
1274 }
1275 XML_ParserFree(parser);
1276 }
1277 } else {
1278 fprintf(stderr, "Unable to start LOCK request\n");
1279 }
1280
1281 curl_slist_free_all(dav_headers);
1282 strbuf_release(&out_buffer.buf);
1283 strbuf_release(&in_buffer);
1284
1285 if (lock->token == NULL || lock->timeout <= 0) {
1286 free(lock->token);
1287 free(lock->owner);
1288 free(url);
1289 free(lock);
1290 lock = NULL;
1291 } else {
1292 lock->url = url;
1293 lock->start_time = time(NULL);
1294 lock->next = remote->locks;
1295 remote->locks = lock;
1296 }
1297
1298 return lock;
1299 }
1300
1301 static int unlock_remote(struct remote_lock *lock)
1302 {
1303 struct active_request_slot *slot;
1304 struct slot_results results;
1305 struct remote_lock *prev = remote->locks;
1306 char *lock_token_header;
1307 struct curl_slist *dav_headers = NULL;
1308 int rc = 0;
1309
1310 lock_token_header = xmalloc(strlen(lock->token) + 31);
1311 sprintf(lock_token_header, "Lock-Token: <%s>",
1312 lock->token);
1313 dav_headers = curl_slist_append(dav_headers, lock_token_header);
1314
1315 slot = get_active_slot();
1316 slot->results = &results;
1317 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1318 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1319 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1320 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1321
1322 if (start_active_slot(slot)) {
1323 run_active_slot(slot);
1324 if (results.curl_result == CURLE_OK)
1325 rc = 1;
1326 else
1327 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1328 results.http_code);
1329 } else {
1330 fprintf(stderr, "Unable to start UNLOCK request\n");
1331 }
1332
1333 curl_slist_free_all(dav_headers);
1334 free(lock_token_header);
1335
1336 if (remote->locks == lock) {
1337 remote->locks = lock->next;
1338 } else {
1339 while (prev && prev->next != lock)
1340 prev = prev->next;
1341 if (prev)
1342 prev->next = prev->next->next;
1343 }
1344
1345 free(lock->owner);
1346 free(lock->url);
1347 free(lock->token);
1348 free(lock);
1349
1350 return rc;
1351 }
1352
1353 static void remove_locks(void)
1354 {
1355 struct remote_lock *lock = remote->locks;
1356
1357 fprintf(stderr, "Removing remote locks...\n");
1358 while (lock) {
1359 unlock_remote(lock);
1360 lock = lock->next;
1361 }
1362 }
1363
1364 static void remove_locks_on_signal(int signo)
1365 {
1366 remove_locks();
1367 sigchain_pop(signo);
1368 raise(signo);
1369 }
1370
1371 static void remote_ls(const char *path, int flags,
1372 void (*userFunc)(struct remote_ls_ctx *ls),
1373 void *userData);
1374
1375 static void process_ls_object(struct remote_ls_ctx *ls)
1376 {
1377 unsigned int *parent = (unsigned int *)ls->userData;
1378 char *path = ls->dentry_name;
1379 char *obj_hex;
1380
1381 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1382 remote_dir_exists[*parent] = 1;
1383 return;
1384 }
1385
1386 if (strlen(path) != 49)
1387 return;
1388 path += 8;
1389 obj_hex = xmalloc(strlen(path));
1390 /* NB: path is not null-terminated, can not use strlcpy here */
1391 memcpy(obj_hex, path, 2);
1392 strcpy(obj_hex + 2, path + 3);
1393 one_remote_object(obj_hex);
1394 free(obj_hex);
1395 }
1396
1397 static void process_ls_ref(struct remote_ls_ctx *ls)
1398 {
1399 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1400 fprintf(stderr, " %s\n", ls->dentry_name);
1401 return;
1402 }
1403
1404 if (!(ls->dentry_flags & IS_DIR))
1405 one_remote_ref(ls->dentry_name);
1406 }
1407
1408 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1409 {
1410 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1411
1412 if (tag_closed) {
1413 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1414 if (ls->dentry_flags & IS_DIR) {
1415 if (ls->flags & PROCESS_DIRS) {
1416 ls->userFunc(ls);
1417 }
1418 if (strcmp(ls->dentry_name, ls->path) &&
1419 ls->flags & RECURSIVE) {
1420 remote_ls(ls->dentry_name,
1421 ls->flags,
1422 ls->userFunc,
1423 ls->userData);
1424 }
1425 } else if (ls->flags & PROCESS_FILES) {
1426 ls->userFunc(ls);
1427 }
1428 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1429 char *path = ctx->cdata;
1430 if (*ctx->cdata == 'h') {
1431 path = strstr(path, "//");
1432 if (path) {
1433 path = strchr(path+2, '/');
1434 }
1435 }
1436 if (path) {
1437 path += remote->path_len;
1438 }
1439 ls->dentry_name = xmalloc(strlen(path) -
1440 remote->path_len + 1);
1441 strcpy(ls->dentry_name, path + remote->path_len);
1442 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1443 ls->dentry_flags |= IS_DIR;
1444 }
1445 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1446 free(ls->dentry_name);
1447 ls->dentry_name = NULL;
1448 ls->dentry_flags = 0;
1449 }
1450 }
1451
1452 static void remote_ls(const char *path, int flags,
1453 void (*userFunc)(struct remote_ls_ctx *ls),
1454 void *userData)
1455 {
1456 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1457 struct active_request_slot *slot;
1458 struct slot_results results;
1459 struct strbuf in_buffer = STRBUF_INIT;
1460 struct buffer out_buffer = { STRBUF_INIT, 0 };
1461 struct curl_slist *dav_headers = NULL;
1462 struct xml_ctx ctx;
1463 struct remote_ls_ctx ls;
1464
1465 ls.flags = flags;
1466 ls.path = xstrdup(path);
1467 ls.dentry_name = NULL;
1468 ls.dentry_flags = 0;
1469 ls.userData = userData;
1470 ls.userFunc = userFunc;
1471
1472 sprintf(url, "%s%s", remote->url, path);
1473
1474 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1475
1476 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1477 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1478
1479 slot = get_active_slot();
1480 slot->results = &results;
1481 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1482 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1483 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1484 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1485 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1486 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1487 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1488 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1489 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1490
1491 if (start_active_slot(slot)) {
1492 run_active_slot(slot);
1493 if (results.curl_result == CURLE_OK) {
1494 XML_Parser parser = XML_ParserCreate(NULL);
1495 enum XML_Status result;
1496 ctx.name = xcalloc(10, 1);
1497 ctx.len = 0;
1498 ctx.cdata = NULL;
1499 ctx.userFunc = handle_remote_ls_ctx;
1500 ctx.userData = &ls;
1501 XML_SetUserData(parser, &ctx);
1502 XML_SetElementHandler(parser, xml_start_tag,
1503 xml_end_tag);
1504 XML_SetCharacterDataHandler(parser, xml_cdata);
1505 result = XML_Parse(parser, in_buffer.buf,
1506 in_buffer.len, 1);
1507 free(ctx.name);
1508
1509 if (result != XML_STATUS_OK) {
1510 fprintf(stderr, "XML error: %s\n",
1511 XML_ErrorString(
1512 XML_GetErrorCode(parser)));
1513 }
1514 XML_ParserFree(parser);
1515 }
1516 } else {
1517 fprintf(stderr, "Unable to start PROPFIND request\n");
1518 }
1519
1520 free(ls.path);
1521 free(url);
1522 strbuf_release(&out_buffer.buf);
1523 strbuf_release(&in_buffer);
1524 curl_slist_free_all(dav_headers);
1525 }
1526
1527 static void get_remote_object_list(unsigned char parent)
1528 {
1529 char path[] = "objects/XX/";
1530 static const char hex[] = "0123456789abcdef";
1531 unsigned int val = parent;
1532
1533 path[8] = hex[val >> 4];
1534 path[9] = hex[val & 0xf];
1535 remote_dir_exists[val] = 0;
1536 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1537 process_ls_object, &val);
1538 }
1539
1540 static int locking_available(void)
1541 {
1542 struct active_request_slot *slot;
1543 struct slot_results results;
1544 struct strbuf in_buffer = STRBUF_INIT;
1545 struct buffer out_buffer = { STRBUF_INIT, 0 };
1546 struct curl_slist *dav_headers = NULL;
1547 struct xml_ctx ctx;
1548 int lock_flags = 0;
1549
1550 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1551
1552 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1553 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1554
1555 slot = get_active_slot();
1556 slot->results = &results;
1557 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1558 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1559 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1560 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1561 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1562 curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1563 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1564 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1565 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1566
1567 if (start_active_slot(slot)) {
1568 run_active_slot(slot);
1569 if (results.curl_result == CURLE_OK) {
1570 XML_Parser parser = XML_ParserCreate(NULL);
1571 enum XML_Status result;
1572 ctx.name = xcalloc(10, 1);
1573 ctx.len = 0;
1574 ctx.cdata = NULL;
1575 ctx.userFunc = handle_lockprop_ctx;
1576 ctx.userData = &lock_flags;
1577 XML_SetUserData(parser, &ctx);
1578 XML_SetElementHandler(parser, xml_start_tag,
1579 xml_end_tag);
1580 result = XML_Parse(parser, in_buffer.buf,
1581 in_buffer.len, 1);
1582 free(ctx.name);
1583
1584 if (result != XML_STATUS_OK) {
1585 fprintf(stderr, "XML error: %s\n",
1586 XML_ErrorString(
1587 XML_GetErrorCode(parser)));
1588 lock_flags = 0;
1589 }
1590 XML_ParserFree(parser);
1591 if (!lock_flags)
1592 error("Error: no DAV locking support on %s",
1593 remote->url);
1594
1595 } else {
1596 error("Cannot access URL %s, return code %d",
1597 remote->url, results.curl_result);
1598 lock_flags = 0;
1599 }
1600 } else {
1601 error("Unable to start PROPFIND request on %s", remote->url);
1602 }
1603
1604 strbuf_release(&out_buffer.buf);
1605 strbuf_release(&in_buffer);
1606 curl_slist_free_all(dav_headers);
1607
1608 return lock_flags;
1609 }
1610
1611 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1612 {
1613 struct object_list *entry = xmalloc(sizeof(struct object_list));
1614 entry->item = obj;
1615 entry->next = *p;
1616 *p = entry;
1617 return &entry->next;
1618 }
1619
1620 static struct object_list **process_blob(struct blob *blob,
1621 struct object_list **p,
1622 struct name_path *path,
1623 const char *name)
1624 {
1625 struct object *obj = &blob->object;
1626
1627 obj->flags |= LOCAL;
1628
1629 if (obj->flags & (UNINTERESTING | SEEN))
1630 return p;
1631
1632 obj->flags |= SEEN;
1633 return add_one_object(obj, p);
1634 }
1635
1636 static struct object_list **process_tree(struct tree *tree,
1637 struct object_list **p,
1638 struct name_path *path,
1639 const char *name)
1640 {
1641 struct object *obj = &tree->object;
1642 struct tree_desc desc;
1643 struct name_entry entry;
1644 struct name_path me;
1645
1646 obj->flags |= LOCAL;
1647
1648 if (obj->flags & (UNINTERESTING | SEEN))
1649 return p;
1650 if (parse_tree(tree) < 0)
1651 die("bad tree object %s", sha1_to_hex(obj->sha1));
1652
1653 obj->flags |= SEEN;
1654 name = xstrdup(name);
1655 p = add_one_object(obj, p);
1656 me.up = path;
1657 me.elem = name;
1658 me.elem_len = strlen(name);
1659
1660 init_tree_desc(&desc, tree->buffer, tree->size);
1661
1662 while (tree_entry(&desc, &entry))
1663 switch (object_type(entry.mode)) {
1664 case OBJ_TREE:
1665 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1666 break;
1667 case OBJ_BLOB:
1668 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1669 break;
1670 default:
1671 /* Subproject commit - not in this repository */
1672 break;
1673 }
1674
1675 free(tree->buffer);
1676 tree->buffer = NULL;
1677 return p;
1678 }
1679
1680 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1681 {
1682 int i;
1683 struct commit *commit;
1684 struct object_list **p = &objects;
1685 int count = 0;
1686
1687 while ((commit = get_revision(revs)) != NULL) {
1688 p = process_tree(commit->tree, p, NULL, "");
1689 commit->object.flags |= LOCAL;
1690 if (!(commit->object.flags & UNINTERESTING))
1691 count += add_send_request(&commit->object, lock);
1692 }
1693
1694 for (i = 0; i < revs->pending.nr; i++) {
1695 struct object_array_entry *entry = revs->pending.objects + i;
1696 struct object *obj = entry->item;
1697 const char *name = entry->name;
1698
1699 if (obj->flags & (UNINTERESTING | SEEN))
1700 continue;
1701 if (obj->type == OBJ_TAG) {
1702 obj->flags |= SEEN;
1703 p = add_one_object(obj, p);
1704 continue;
1705 }
1706 if (obj->type == OBJ_TREE) {
1707 p = process_tree((struct tree *)obj, p, NULL, name);
1708 continue;
1709 }
1710 if (obj->type == OBJ_BLOB) {
1711 p = process_blob((struct blob *)obj, p, NULL, name);
1712 continue;
1713 }
1714 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1715 }
1716
1717 while (objects) {
1718 if (!(objects->item->flags & UNINTERESTING))
1719 count += add_send_request(objects->item, lock);
1720 objects = objects->next;
1721 }
1722
1723 return count;
1724 }
1725
1726 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1727 {
1728 struct active_request_slot *slot;
1729 struct slot_results results;
1730 char *if_header;
1731 struct buffer out_buffer = { STRBUF_INIT, 0 };
1732 struct curl_slist *dav_headers = NULL;
1733
1734 if_header = xmalloc(strlen(lock->token) + 25);
1735 sprintf(if_header, "If: (<%s>)", lock->token);
1736 dav_headers = curl_slist_append(dav_headers, if_header);
1737
1738 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1739
1740 slot = get_active_slot();
1741 slot->results = &results;
1742 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1743 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1744 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1745 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1746 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1747 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1748 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1749 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1750 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1751
1752 if (start_active_slot(slot)) {
1753 run_active_slot(slot);
1754 strbuf_release(&out_buffer.buf);
1755 free(if_header);
1756 if (results.curl_result != CURLE_OK) {
1757 fprintf(stderr,
1758 "PUT error: curl result=%d, HTTP code=%ld\n",
1759 results.curl_result, results.http_code);
1760 /* We should attempt recovery? */
1761 return 0;
1762 }
1763 } else {
1764 strbuf_release(&out_buffer.buf);
1765 free(if_header);
1766 fprintf(stderr, "Unable to start PUT request\n");
1767 return 0;
1768 }
1769
1770 return 1;
1771 }
1772
1773 static struct ref *local_refs, **local_tail;
1774 static struct ref *remote_refs, **remote_tail;
1775
1776 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1777 {
1778 struct ref *ref;
1779 int len = strlen(refname) + 1;
1780 ref = xcalloc(1, sizeof(*ref) + len);
1781 hashcpy(ref->new_sha1, sha1);
1782 memcpy(ref->name, refname, len);
1783 *local_tail = ref;
1784 local_tail = &ref->next;
1785 return 0;
1786 }
1787
1788 static void one_remote_ref(char *refname)
1789 {
1790 struct ref *ref;
1791 struct object *obj;
1792
1793 ref = alloc_ref(refname);
1794
1795 if (http_fetch_ref(remote->url, ref) != 0) {
1796 fprintf(stderr,
1797 "Unable to fetch ref %s from %s\n",
1798 refname, remote->url);
1799 free(ref);
1800 return;
1801 }
1802
1803 /*
1804 * Fetch a copy of the object if it doesn't exist locally - it
1805 * may be required for updating server info later.
1806 */
1807 if (remote->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
1808 obj = lookup_unknown_object(ref->old_sha1);
1809 if (obj) {
1810 fprintf(stderr, " fetch %s for %s\n",
1811 sha1_to_hex(ref->old_sha1), refname);
1812 add_fetch_request(obj);
1813 }
1814 }
1815
1816 *remote_tail = ref;
1817 remote_tail = &ref->next;
1818 }
1819
1820 static void get_local_heads(void)
1821 {
1822 local_tail = &local_refs;
1823 for_each_ref(one_local_ref, NULL);
1824 }
1825
1826 static void get_dav_remote_heads(void)
1827 {
1828 remote_tail = &remote_refs;
1829 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1830 }
1831
1832 static int is_zero_sha1(const unsigned char *sha1)
1833 {
1834 int i;
1835
1836 for (i = 0; i < 20; i++) {
1837 if (*sha1++)
1838 return 0;
1839 }
1840 return 1;
1841 }
1842
1843 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1844 {
1845 while (list) {
1846 struct commit_list *temp = list;
1847 temp->item->object.flags &= ~mark;
1848 list = temp->next;
1849 free(temp);
1850 }
1851 }
1852
1853 static int ref_newer(const unsigned char *new_sha1,
1854 const unsigned char *old_sha1)
1855 {
1856 struct object *o;
1857 struct commit *old, *new;
1858 struct commit_list *list, *used;
1859 int found = 0;
1860
1861 /* Both new and old must be commit-ish and new is descendant of
1862 * old. Otherwise we require --force.
1863 */
1864 o = deref_tag(parse_object(old_sha1), NULL, 0);
1865 if (!o || o->type != OBJ_COMMIT)
1866 return 0;
1867 old = (struct commit *) o;
1868
1869 o = deref_tag(parse_object(new_sha1), NULL, 0);
1870 if (!o || o->type != OBJ_COMMIT)
1871 return 0;
1872 new = (struct commit *) o;
1873
1874 if (parse_commit(new) < 0)
1875 return 0;
1876
1877 used = list = NULL;
1878 commit_list_insert(new, &list);
1879 while (list) {
1880 new = pop_most_recent_commit(&list, TMP_MARK);
1881 commit_list_insert(new, &used);
1882 if (new == old) {
1883 found = 1;
1884 break;
1885 }
1886 }
1887 unmark_and_free(list, TMP_MARK);
1888 unmark_and_free(used, TMP_MARK);
1889 return found;
1890 }
1891
1892 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1893 {
1894 struct strbuf *buf = (struct strbuf *)ls->userData;
1895 struct object *o;
1896 int len;
1897 char *ref_info;
1898 struct ref *ref;
1899
1900 ref = alloc_ref(ls->dentry_name);
1901
1902 if (http_fetch_ref(remote->url, ref) != 0) {
1903 fprintf(stderr,
1904 "Unable to fetch ref %s from %s\n",
1905 ls->dentry_name, remote->url);
1906 aborted = 1;
1907 free(ref);
1908 return;
1909 }
1910
1911 o = parse_object(ref->old_sha1);
1912 if (!o) {
1913 fprintf(stderr,
1914 "Unable to parse object %s for remote ref %s\n",
1915 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1916 aborted = 1;
1917 free(ref);
1918 return;
1919 }
1920
1921 len = strlen(ls->dentry_name) + 42;
1922 ref_info = xcalloc(len + 1, 1);
1923 sprintf(ref_info, "%s %s\n",
1924 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1925 fwrite_buffer(ref_info, 1, len, buf);
1926 free(ref_info);
1927
1928 if (o->type == OBJ_TAG) {
1929 o = deref_tag(o, ls->dentry_name, 0);
1930 if (o) {
1931 len = strlen(ls->dentry_name) + 45;
1932 ref_info = xcalloc(len + 1, 1);
1933 sprintf(ref_info, "%s %s^{}\n",
1934 sha1_to_hex(o->sha1), ls->dentry_name);
1935 fwrite_buffer(ref_info, 1, len, buf);
1936 free(ref_info);
1937 }
1938 }
1939 free(ref);
1940 }
1941
1942 static void update_remote_info_refs(struct remote_lock *lock)
1943 {
1944 struct buffer buffer = { STRBUF_INIT, 0 };
1945 struct active_request_slot *slot;
1946 struct slot_results results;
1947 char *if_header;
1948 struct curl_slist *dav_headers = NULL;
1949
1950 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1951 add_remote_info_ref, &buffer.buf);
1952 if (!aborted) {
1953 if_header = xmalloc(strlen(lock->token) + 25);
1954 sprintf(if_header, "If: (<%s>)", lock->token);
1955 dav_headers = curl_slist_append(dav_headers, if_header);
1956
1957 slot = get_active_slot();
1958 slot->results = &results;
1959 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
1960 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.buf.len);
1961 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1962 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1963 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1964 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1965 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1966 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1967 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1968
1969 if (start_active_slot(slot)) {
1970 run_active_slot(slot);
1971 if (results.curl_result != CURLE_OK) {
1972 fprintf(stderr,
1973 "PUT error: curl result=%d, HTTP code=%ld\n",
1974 results.curl_result, results.http_code);
1975 }
1976 }
1977 free(if_header);
1978 }
1979 strbuf_release(&buffer.buf);
1980 }
1981
1982 static int remote_exists(const char *path)
1983 {
1984 char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1985 struct active_request_slot *slot;
1986 struct slot_results results;
1987 int ret = -1;
1988
1989 sprintf(url, "%s%s", remote->url, path);
1990
1991 slot = get_active_slot();
1992 slot->results = &results;
1993 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1994 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1995
1996 if (start_active_slot(slot)) {
1997 run_active_slot(slot);
1998 if (results.http_code == 404)
1999 ret = 0;
2000 else if (results.curl_result == CURLE_OK)
2001 ret = 1;
2002 else
2003 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2004 } else {
2005 fprintf(stderr, "Unable to start HEAD request\n");
2006 }
2007
2008 free(url);
2009 return ret;
2010 }
2011
2012 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2013 {
2014 char *url;
2015 struct strbuf buffer = STRBUF_INIT;
2016 struct active_request_slot *slot;
2017 struct slot_results results;
2018
2019 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2020 sprintf(url, "%s%s", remote->url, path);
2021
2022 slot = get_active_slot();
2023 slot->results = &results;
2024 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2025 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2026 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2027 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2028 if (start_active_slot(slot)) {
2029 run_active_slot(slot);
2030 if (results.curl_result != CURLE_OK) {
2031 die("Couldn't get %s for remote symref\n%s",
2032 url, curl_errorstr);
2033 }
2034 } else {
2035 die("Unable to start remote symref request");
2036 }
2037 free(url);
2038
2039 free(*symref);
2040 *symref = NULL;
2041 hashclr(sha1);
2042
2043 if (buffer.len == 0)
2044 return;
2045
2046 /* If it's a symref, set the refname; otherwise try for a sha1 */
2047 if (!prefixcmp((char *)buffer.buf, "ref: ")) {
2048 *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
2049 } else {
2050 get_sha1_hex(buffer.buf, sha1);
2051 }
2052
2053 strbuf_release(&buffer);
2054 }
2055
2056 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2057 {
2058 struct commit *head = lookup_commit(head_sha1);
2059 struct commit *branch = lookup_commit(branch_sha1);
2060 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2061
2062 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2063 }
2064
2065 static int delete_remote_branch(char *pattern, int force)
2066 {
2067 struct ref *refs = remote_refs;
2068 struct ref *remote_ref = NULL;
2069 unsigned char head_sha1[20];
2070 char *symref = NULL;
2071 int match;
2072 int patlen = strlen(pattern);
2073 int i;
2074 struct active_request_slot *slot;
2075 struct slot_results results;
2076 char *url;
2077
2078 /* Find the remote branch(es) matching the specified branch name */
2079 for (match = 0; refs; refs = refs->next) {
2080 char *name = refs->name;
2081 int namelen = strlen(name);
2082 if (namelen < patlen ||
2083 memcmp(name + namelen - patlen, pattern, patlen))
2084 continue;
2085 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2086 continue;
2087 match++;
2088 remote_ref = refs;
2089 }
2090 if (match == 0)
2091 return error("No remote branch matches %s", pattern);
2092 if (match != 1)
2093 return error("More than one remote branch matches %s",
2094 pattern);
2095
2096 /*
2097 * Remote HEAD must be a symref (not exactly foolproof; a remote
2098 * symlink to a symref will look like a symref)
2099 */
2100 fetch_symref("HEAD", &symref, head_sha1);
2101 if (!symref)
2102 return error("Remote HEAD is not a symref");
2103
2104 /* Remote branch must not be the remote HEAD */
2105 for (i=0; symref && i<MAXDEPTH; i++) {
2106 if (!strcmp(remote_ref->name, symref))
2107 return error("Remote branch %s is the current HEAD",
2108 remote_ref->name);
2109 fetch_symref(symref, &symref, head_sha1);
2110 }
2111
2112 /* Run extra sanity checks if delete is not forced */
2113 if (!force) {
2114 /* Remote HEAD must resolve to a known object */
2115 if (symref)
2116 return error("Remote HEAD symrefs too deep");
2117 if (is_zero_sha1(head_sha1))
2118 return error("Unable to resolve remote HEAD");
2119 if (!has_sha1_file(head_sha1))
2120 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2121
2122 /* Remote branch must resolve to a known object */
2123 if (is_zero_sha1(remote_ref->old_sha1))
2124 return error("Unable to resolve remote branch %s",
2125 remote_ref->name);
2126 if (!has_sha1_file(remote_ref->old_sha1))
2127 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));
2128
2129 /* Remote branch must be an ancestor of remote HEAD */
2130 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2131 return error("The branch '%s' is not an ancestor "
2132 "of your current HEAD.\n"
2133 "If you are sure you want to delete it,"
2134 " run:\n\t'git http-push -D %s %s'",
2135 remote_ref->name, remote->url, pattern);
2136 }
2137 }
2138
2139 /* Send delete request */
2140 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2141 if (dry_run)
2142 return 0;
2143 url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
2144 sprintf(url, "%s%s", remote->url, remote_ref->name);
2145 slot = get_active_slot();
2146 slot->results = &results;
2147 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2148 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2149 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2150 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2151 if (start_active_slot(slot)) {
2152 run_active_slot(slot);
2153 free(url);
2154 if (results.curl_result != CURLE_OK)
2155 return error("DELETE request failed (%d/%ld)\n",
2156 results.curl_result, results.http_code);
2157 } else {
2158 free(url);
2159 return error("Unable to start DELETE request");
2160 }
2161
2162 return 0;
2163 }
2164
2165 int main(int argc, char **argv)
2166 {
2167 struct transfer_request *request;
2168 struct transfer_request *next_request;
2169 int nr_refspec = 0;
2170 char **refspec = NULL;
2171 struct remote_lock *ref_lock = NULL;
2172 struct remote_lock *info_ref_lock = NULL;
2173 struct rev_info revs;
2174 int delete_branch = 0;
2175 int force_delete = 0;
2176 int objects_to_send;
2177 int rc = 0;
2178 int i;
2179 int new_refs;
2180 struct ref *ref;
2181 char *rewritten_url = NULL;
2182
2183 setup_git_directory();
2184
2185 remote = xcalloc(sizeof(*remote), 1);
2186
2187 argv++;
2188 for (i = 1; i < argc; i++, argv++) {
2189 char *arg = *argv;
2190
2191 if (*arg == '-') {
2192 if (!strcmp(arg, "--all")) {
2193 push_all = MATCH_REFS_ALL;
2194 continue;
2195 }
2196 if (!strcmp(arg, "--force")) {
2197 force_all = 1;
2198 continue;
2199 }
2200 if (!strcmp(arg, "--dry-run")) {
2201 dry_run = 1;
2202 continue;
2203 }
2204 if (!strcmp(arg, "--verbose")) {
2205 push_verbosely = 1;
2206 continue;
2207 }
2208 if (!strcmp(arg, "-d")) {
2209 delete_branch = 1;
2210 continue;
2211 }
2212 if (!strcmp(arg, "-D")) {
2213 delete_branch = 1;
2214 force_delete = 1;
2215 continue;
2216 }
2217 }
2218 if (!remote->url) {
2219 char *path = strstr(arg, "//");
2220 remote->url = arg;
2221 remote->path_len = strlen(arg);
2222 if (path) {
2223 remote->path = strchr(path+2, '/');
2224 if (remote->path)
2225 remote->path_len = strlen(remote->path);
2226 }
2227 continue;
2228 }
2229 refspec = argv;
2230 nr_refspec = argc - i;
2231 break;
2232 }
2233
2234 #ifndef USE_CURL_MULTI
2235 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
2236 #endif
2237
2238 if (!remote->url)
2239 usage(http_push_usage);
2240
2241 if (delete_branch && nr_refspec != 1)
2242 die("You must specify only one branch name when deleting a remote branch");
2243
2244 memset(remote_dir_exists, -1, 256);
2245
2246 http_init(NULL);
2247
2248 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2249
2250 if (remote->url && remote->url[strlen(remote->url)-1] != '/') {
2251 rewritten_url = xmalloc(strlen(remote->url)+2);
2252 strcpy(rewritten_url, remote->url);
2253 strcat(rewritten_url, "/");
2254 remote->path = rewritten_url + (remote->path - remote->url);
2255 remote->path_len++;
2256 remote->url = rewritten_url;
2257 }
2258
2259 /* Verify DAV compliance/lock support */
2260 if (!locking_available()) {
2261 rc = 1;
2262 goto cleanup;
2263 }
2264
2265 sigchain_push_common(remove_locks_on_signal);
2266
2267 /* Check whether the remote has server info files */
2268 remote->can_update_info_refs = 0;
2269 remote->has_info_refs = remote_exists("info/refs");
2270 remote->has_info_packs = remote_exists("objects/info/packs");
2271 if (remote->has_info_refs) {
2272 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2273 if (info_ref_lock)
2274 remote->can_update_info_refs = 1;
2275 else {
2276 fprintf(stderr, "Error: cannot lock existing info/refs\n");
2277 rc = 1;
2278 goto cleanup;
2279 }
2280 }
2281 if (remote->has_info_packs)
2282 fetch_indices();
2283
2284 /* Get a list of all local and remote heads to validate refspecs */
2285 get_local_heads();
2286 fprintf(stderr, "Fetching remote heads...\n");
2287 get_dav_remote_heads();
2288
2289 /* Remove a remote branch if -d or -D was specified */
2290 if (delete_branch) {
2291 if (delete_remote_branch(refspec[0], force_delete) == -1)
2292 fprintf(stderr, "Unable to delete remote branch %s\n",
2293 refspec[0]);
2294 goto cleanup;
2295 }
2296
2297 /* match them up */
2298 if (!remote_tail)
2299 remote_tail = &remote_refs;
2300 if (match_refs(local_refs, remote_refs, &remote_tail,
2301 nr_refspec, (const char **) refspec, push_all)) {
2302 rc = -1;
2303 goto cleanup;
2304 }
2305 if (!remote_refs) {
2306 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2307 rc = 0;
2308 goto cleanup;
2309 }
2310
2311 new_refs = 0;
2312 for (ref = remote_refs; ref; ref = ref->next) {
2313 char old_hex[60], *new_hex;
2314 const char *commit_argv[4];
2315 int commit_argc;
2316 char *new_sha1_hex, *old_sha1_hex;
2317
2318 if (!ref->peer_ref)
2319 continue;
2320
2321 if (is_zero_sha1(ref->peer_ref->new_sha1)) {
2322 if (delete_remote_branch(ref->name, 1) == -1) {
2323 error("Could not remove %s", ref->name);
2324 rc = -4;
2325 }
2326 new_refs++;
2327 continue;
2328 }
2329
2330 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2331 if (push_verbosely || 1)
2332 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2333 continue;
2334 }
2335
2336 if (!force_all &&
2337 !is_zero_sha1(ref->old_sha1) &&
2338 !ref->force) {
2339 if (!has_sha1_file(ref->old_sha1) ||
2340 !ref_newer(ref->peer_ref->new_sha1,
2341 ref->old_sha1)) {
2342 /*
2343 * We do not have the remote ref, or
2344 * we know that the remote ref is not
2345 * an ancestor of what we are trying to
2346 * push. Either way this can be losing
2347 * commits at the remote end and likely
2348 * we were not up to date to begin with.
2349 */
2350 error("remote '%s' is not an ancestor of\n"
2351 "local '%s'.\n"
2352 "Maybe you are not up-to-date and "
2353 "need to pull first?",
2354 ref->name,
2355 ref->peer_ref->name);
2356 rc = -2;
2357 continue;
2358 }
2359 }
2360 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2361 new_refs++;
2362 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2363 new_hex = sha1_to_hex(ref->new_sha1);
2364
2365 fprintf(stderr, "updating '%s'", ref->name);
2366 if (strcmp(ref->name, ref->peer_ref->name))
2367 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2368 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2369 if (dry_run)
2370 continue;
2371
2372 /* Lock remote branch ref */
2373 ref_lock = lock_remote(ref->name, LOCK_TIME);
2374 if (ref_lock == NULL) {
2375 fprintf(stderr, "Unable to lock remote branch %s\n",
2376 ref->name);
2377 rc = 1;
2378 continue;
2379 }
2380
2381 /* Set up revision info for this refspec */
2382 commit_argc = 3;
2383 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2384 old_sha1_hex = NULL;
2385 commit_argv[1] = "--objects";
2386 commit_argv[2] = new_sha1_hex;
2387 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2388 old_sha1_hex = xmalloc(42);
2389 sprintf(old_sha1_hex, "^%s",
2390 sha1_to_hex(ref->old_sha1));
2391 commit_argv[3] = old_sha1_hex;
2392 commit_argc++;
2393 }
2394 init_revisions(&revs, setup_git_directory());
2395 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2396 revs.edge_hint = 0; /* just in case */
2397 free(new_sha1_hex);
2398 if (old_sha1_hex) {
2399 free(old_sha1_hex);
2400 commit_argv[1] = NULL;
2401 }
2402
2403 /* Generate a list of objects that need to be pushed */
2404 pushing = 0;
2405 if (prepare_revision_walk(&revs))
2406 die("revision walk setup failed");
2407 mark_edges_uninteresting(revs.commits, &revs, NULL);
2408 objects_to_send = get_delta(&revs, ref_lock);
2409 finish_all_active_slots();
2410
2411 /* Push missing objects to remote, this would be a
2412 convenient time to pack them first if appropriate. */
2413 pushing = 1;
2414 if (objects_to_send)
2415 fprintf(stderr, " sending %d objects\n",
2416 objects_to_send);
2417 #ifdef USE_CURL_MULTI
2418 fill_active_slots();
2419 add_fill_function(NULL, fill_active_slot);
2420 #endif
2421 do {
2422 finish_all_active_slots();
2423 #ifdef USE_CURL_MULTI
2424 fill_active_slots();
2425 #endif
2426 } while (request_queue_head && !aborted);
2427
2428 /* Update the remote branch if all went well */
2429 if (aborted || !update_remote(ref->new_sha1, ref_lock))
2430 rc = 1;
2431
2432 if (!rc)
2433 fprintf(stderr, " done\n");
2434 unlock_remote(ref_lock);
2435 check_locks();
2436 }
2437
2438 /* Update remote server info if appropriate */
2439 if (remote->has_info_refs && new_refs) {
2440 if (info_ref_lock && remote->can_update_info_refs) {
2441 fprintf(stderr, "Updating remote server info\n");
2442 if (!dry_run)
2443 update_remote_info_refs(info_ref_lock);
2444 } else {
2445 fprintf(stderr, "Unable to update server info\n");
2446 }
2447 }
2448
2449 cleanup:
2450 free(rewritten_url);
2451 if (info_ref_lock)
2452 unlock_remote(info_ref_lock);
2453 free(remote);
2454
2455 curl_slist_free_all(no_pragma_header);
2456
2457 http_cleanup();
2458
2459 request = request_queue_head;
2460 while (request != NULL) {
2461 next_request = request->next;
2462 release_request(request);
2463 request = next_request;
2464 }
2465
2466 return rc;
2467 }
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