http-push.c

   1 #include "cache.h"
   2 #include "commit.h"
   3 #include "tag.h"
   4 #include "blob.h"
   5 #include "http.h"
   6 #include "refs.h"
   7 #include "diff.h"
   8 #include "revision.h"
   9 #include "exec_cmd.h"
  10 #include "remote.h"
  11 #include "list-objects.h"
  12 #include "sigchain.h"
  13
  14 #ifdef EXPAT_NEEDS_XMLPARSE_H
  15 #include <xmlparse.h>
  16 #else
  17 #include <expat.h>
  18 #endif
  19
  20 static const char http_push_usage[] =
  21 "git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
  22
  23 #ifndef XML_STATUS_OK
  24 enum XML_Status {
  25   XML_STATUS_OK = 1,
  26   XML_STATUS_ERROR = 0
  27 };
  28 #define XML_STATUS_OK    1
  29 #define XML_STATUS_ERROR 0
  30 #endif
  31
  32 #define PREV_BUF_SIZE 4096
  33
  34 /* DAV methods */
  35 #define DAV_LOCK "LOCK"
  36 #define DAV_MKCOL "MKCOL"
  37 #define DAV_MOVE "MOVE"
  38 #define DAV_PROPFIND "PROPFIND"
  39 #define DAV_PUT "PUT"
  40 #define DAV_UNLOCK "UNLOCK"
  41 #define DAV_DELETE "DELETE"
  42
  43 /* DAV lock flags */
  44 #define DAV_PROP_LOCKWR (1u << 0)
  45 #define DAV_PROP_LOCKEX (1u << 1)
  46 #define DAV_LOCK_OK (1u << 2)
  47
  48 /* DAV XML properties */
  49 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
  50 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
  51 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
  52 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
  53 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
  54 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
  55 #define DAV_PROPFIND_RESP ".multistatus.response"
  56 #define DAV_PROPFIND_NAME ".multistatus.response.href"
  57 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
  58
  59 /* DAV request body templates */
  60 #define PROPFIND_SUPPORTEDLOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:prop xmlns:R=\"%s\">\n<D:supportedlock/>\n</D:prop>\n</D:propfind>"
  61 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
  62 #define LOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:lockinfo xmlns:D=\"DAV:\">\n<D:lockscope><D:exclusive/></D:lockscope>\n<D:locktype><D:write/></D:locktype>\n<D:owner>\n<D:href>mailto:%s</D:href>\n</D:owner>\n</D:lockinfo>"
  63
  64 #define LOCK_TIME 600
  65 #define LOCK_REFRESH 30
  66
  67 /* Remember to update object flag allocation in object.h */
  68 #define LOCAL    (1u<<16)
  69 #define REMOTE   (1u<<17)
  70 #define FETCHING (1u<<18)
  71 #define PUSHING  (1u<<19)
  72
  73 /* We allow "recursive" symbolic refs. Only within reason, though */
  74 #define MAXDEPTH 5
  75
  76 static int pushing;
  77 static int aborted;
  78 static signed char remote_dir_exists[256];
  79
  80 static int push_verbosely;
  81 static int push_all = MATCH_REFS_NONE;
  82 static int force_all;
  83 static int dry_run;
  84 static int helper_status;
  85
  86 static struct object_list *objects;
  87
  88 struct repo {
  89         char *url;
  90         char *path;
  91         int path_len;
  92         int has_info_refs;
  93         int can_update_info_refs;
  94         int has_info_packs;
  95         struct packed_git *packs;
  96         struct remote_lock *locks;
  97 };
  98
  99 static struct repo *repo;
 100
 101 enum transfer_state {
 102         NEED_FETCH,
 103         RUN_FETCH_LOOSE,
 104         RUN_FETCH_PACKED,
 105         NEED_PUSH,
 106         RUN_MKCOL,
 107         RUN_PUT,
 108         RUN_MOVE,
 109         ABORTED,
 110         COMPLETE
 111 };
 112
 113 struct transfer_request {
 114         struct object *obj;
 115         char *url;
 116         char *dest;
 117         struct remote_lock *lock;
 118         struct curl_slist *headers;
 119         struct buffer buffer;
 120         enum transfer_state state;
 121         CURLcode curl_result;
 122         char errorstr[CURL_ERROR_SIZE];
 123         long http_code;
 124         void *userData;
 125         struct active_request_slot *slot;
 126         struct transfer_request *next;
 127 };
 128
 129 static struct transfer_request *request_queue_head;
 130
 131 struct xml_ctx {
 132         char *name;
 133         int len;
 134         char *cdata;
 135         void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
 136         void *userData;
 137 };
 138
 139 struct remote_lock {
 140         char *url;
 141         char *owner;
 142         char *token;
 143         char tmpfile_suffix[41];
 144         time_t start_time;
 145         long timeout;
 146         int refreshing;
 147         struct remote_lock *next;
 148 };
 149
 150 /* Flags that control remote_ls processing */
 151 #define PROCESS_FILES (1u << 0)
 152 #define PROCESS_DIRS  (1u << 1)
 153 #define RECURSIVE     (1u << 2)
 154
 155 /* Flags that remote_ls passes to callback functions */
 156 #define IS_DIR (1u << 0)
 157
 158 struct remote_ls_ctx {
 159         char *path;
 160         void (*userFunc)(struct remote_ls_ctx *ls);
 161         void *userData;
 162         int flags;
 163         char *dentry_name;
 164         int dentry_flags;
 165         struct remote_ls_ctx *parent;
 166 };
 167
 168 /* get_dav_token_headers options */
 169 enum dav_header_flag {
 170         DAV_HEADER_IF = (1u << 0),
 171         DAV_HEADER_LOCK = (1u << 1),
 172         DAV_HEADER_TIMEOUT = (1u << 2)
 173 };
 174
 175 static char *xml_entities(const char *s)
 176 {
 177         struct strbuf buf = STRBUF_INIT;
 178         strbuf_addstr_xml_quoted(&buf, s);
 179         return strbuf_detach(&buf, NULL);
 180 }
 181
 182 static void curl_setup_http_get(CURL *curl, const char *url,
 183                 const char *custom_req)
 184 {
 185         curl_easy_setopt(curl, CURLOPT_HTTPGET, 1);
 186         curl_easy_setopt(curl, CURLOPT_URL, url);
 187         curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
 188         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_null);
 189 }
 190
 191 static void curl_setup_http(CURL *curl, const char *url,
 192                 const char *custom_req, struct buffer *buffer,
 193                 curl_write_callback write_fn)
 194 {
 195         curl_easy_setopt(curl, CURLOPT_PUT, 1);
 196         curl_easy_setopt(curl, CURLOPT_URL, url);
 197         curl_easy_setopt(curl, CURLOPT_INFILE, buffer);
 198         curl_easy_setopt(curl, CURLOPT_INFILESIZE, buffer->buf.len);
 199         curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
 200 #ifndef NO_CURL_IOCTL
 201         curl_easy_setopt(curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
 202         curl_easy_setopt(curl, CURLOPT_IOCTLDATA, buffer);
 203 #endif
 204         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_fn);
 205         curl_easy_setopt(curl, CURLOPT_NOBODY, 0);
 206         curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
 207         curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);
 208 }
 209
 210 static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
 211 {
 212         struct strbuf buf = STRBUF_INIT;
 213         struct curl_slist *dav_headers = NULL;
 214
 215         if (options & DAV_HEADER_IF) {
 216                 strbuf_addf(&buf, "If: (<%s>)", lock->token);
 217                 dav_headers = curl_slist_append(dav_headers, buf.buf);
 218                 strbuf_reset(&buf);
 219         }
 220         if (options & DAV_HEADER_LOCK) {
 221                 strbuf_addf(&buf, "Lock-Token: <%s>", lock->token);
 222                 dav_headers = curl_slist_append(dav_headers, buf.buf);
 223                 strbuf_reset(&buf);
 224         }
 225         if (options & DAV_HEADER_TIMEOUT) {
 226                 strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout);
 227                 dav_headers = curl_slist_append(dav_headers, buf.buf);
 228                 strbuf_reset(&buf);
 229         }
 230         strbuf_release(&buf);
 231
 232         return dav_headers;
 233 }
 234
 235 static void finish_request(struct transfer_request *request);
 236 static void release_request(struct transfer_request *request);
 237
 238 static void process_response(void *callback_data)
 239 {
 240         struct transfer_request *request =
 241                 (struct transfer_request *)callback_data;
 242
 243         finish_request(request);
 244 }
 245
 246 #ifdef USE_CURL_MULTI
 247
 248 static void start_fetch_loose(struct transfer_request *request)
 249 {
 250         struct active_request_slot *slot;
 251         struct http_object_request *obj_req;
 252
 253         obj_req = new_http_object_request(repo->url, request->obj->sha1);
 254         if (obj_req == NULL) {
 255                 request->state = ABORTED;
 256                 return;
 257         }
 258
 259         slot = obj_req->slot;
 260         slot->callback_func = process_response;
 261         slot->callback_data = request;
 262         request->slot = slot;
 263         request->userData = obj_req;
 264
 265         /* Try to get the request started, abort the request on error */
 266         request->state = RUN_FETCH_LOOSE;
 267         if (!start_active_slot(slot)) {
 268                 fprintf(stderr, "Unable to start GET request\n");
 269                 repo->can_update_info_refs = 0;
 270                 release_http_object_request(obj_req);
 271                 release_request(request);
 272         }
 273 }
 274
 275 static void start_mkcol(struct transfer_request *request)
 276 {
 277         char *hex = sha1_to_hex(request->obj->sha1);
 278         struct active_request_slot *slot;
 279
 280         request->url = get_remote_object_url(repo->url, hex, 1);
 281
 282         slot = get_active_slot();
 283         slot->callback_func = process_response;
 284         slot->callback_data = request;
 285         curl_setup_http_get(slot->curl, request->url, DAV_MKCOL);
 286         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
 287
 288         if (start_active_slot(slot)) {
 289                 request->slot = slot;
 290                 request->state = RUN_MKCOL;
 291         } else {
 292                 request->state = ABORTED;
 293                 free(request->url);
 294                 request->url = NULL;
 295         }
 296 }
 297 #endif
 298
 299 static void start_fetch_packed(struct transfer_request *request)
 300 {
 301         struct packed_git *target;
 302
 303         struct transfer_request *check_request = request_queue_head;
 304         struct http_pack_request *preq;
 305
 306         target = find_sha1_pack(request->obj->sha1, repo->packs);
 307         if (!target) {
 308                 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
 309                 repo->can_update_info_refs = 0;
 310                 release_request(request);
 311                 return;
 312         }
 313
 314         fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
 315         fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
 316
 317         preq = new_http_pack_request(target, repo->url);
 318         if (preq == NULL) {
 319                 repo->can_update_info_refs = 0;
 320                 return;
 321         }
 322         preq->lst = &repo->packs;
 323
 324         /* Make sure there isn't another open request for this pack */
 325         while (check_request) {
 326                 if (check_request->state == RUN_FETCH_PACKED &&
 327                     !strcmp(check_request->url, preq->url)) {
 328                         release_http_pack_request(preq);
 329                         release_request(request);
 330                         return;
 331                 }
 332                 check_request = check_request->next;
 333         }
 334
 335         preq->slot->callback_func = process_response;
 336         preq->slot->callback_data = request;
 337         request->slot = preq->slot;
 338         request->userData = preq;
 339
 340         /* Try to get the request started, abort the request on error */
 341         request->state = RUN_FETCH_PACKED;
 342         if (!start_active_slot(preq->slot)) {
 343                 fprintf(stderr, "Unable to start GET request\n");
 344                 release_http_pack_request(preq);
 345                 repo->can_update_info_refs = 0;
 346                 release_request(request);
 347         }
 348 }
 349
 350 static void start_put(struct transfer_request *request)
 351 {
 352         char *hex = sha1_to_hex(request->obj->sha1);
 353         struct active_request_slot *slot;
 354         struct strbuf buf = STRBUF_INIT;
 355         enum object_type type;
 356         char hdr[50];
 357         void *unpacked;
 358         unsigned long len;
 359         int hdrlen;
 360         ssize_t size;
 361         git_zstream stream;
 362
 363         unpacked = read_sha1_file(request->obj->sha1, &type, &len);
 364         hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
 365
 366         /* Set it up */
 367         git_deflate_init(&stream, zlib_compression_level);
 368         size = git_deflate_bound(&stream, len + hdrlen);
 369         strbuf_init(&request->buffer.buf, size);
 370         request->buffer.posn = 0;
 371
 372         /* Compress it */
 373         stream.next_out = (unsigned char *)request->buffer.buf.buf;
 374         stream.avail_out = size;
 375
 376         /* First header.. */
 377         stream.next_in = (void *)hdr;
 378         stream.avail_in = hdrlen;
 379         while (git_deflate(&stream, 0) == Z_OK)
 380                 ; /* nothing */
 381
 382         /* Then the data itself.. */
 383         stream.next_in = unpacked;
 384         stream.avail_in = len;
 385         while (git_deflate(&stream, Z_FINISH) == Z_OK)
 386                 ; /* nothing */
 387         git_deflate_end(&stream);
 388         free(unpacked);
 389
 390         request->buffer.buf.len = stream.total_out;
 391
 392         strbuf_addstr(&buf, "Destination: ");
 393         append_remote_object_url(&buf, repo->url, hex, 0);
 394         request->dest = strbuf_detach(&buf, NULL);
 395
 396         append_remote_object_url(&buf, repo->url, hex, 0);
 397         strbuf_add(&buf, request->lock->tmpfile_suffix, 41);
 398         request->url = strbuf_detach(&buf, NULL);
 399
 400         slot = get_active_slot();
 401         slot->callback_func = process_response;
 402         slot->callback_data = request;
 403         curl_setup_http(slot->curl, request->url, DAV_PUT,
 404                         &request->buffer, fwrite_null);
 405
 406         if (start_active_slot(slot)) {
 407                 request->slot = slot;
 408                 request->state = RUN_PUT;
 409         } else {
 410                 request->state = ABORTED;
 411                 free(request->url);
 412                 request->url = NULL;
 413         }
 414 }
 415
 416 static void start_move(struct transfer_request *request)
 417 {
 418         struct active_request_slot *slot;
 419         struct curl_slist *dav_headers = NULL;
 420
 421         slot = get_active_slot();
 422         slot->callback_func = process_response;
 423         slot->callback_data = request;
 424         curl_setup_http_get(slot->curl, request->url, DAV_MOVE);
 425         dav_headers = curl_slist_append(dav_headers, request->dest);
 426         dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
 427         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
 428
 429         if (start_active_slot(slot)) {
 430                 request->slot = slot;
 431                 request->state = RUN_MOVE;
 432         } else {
 433                 request->state = ABORTED;
 434                 free(request->url);
 435                 request->url = NULL;
 436         }
 437 }
 438
 439 static int refresh_lock(struct remote_lock *lock)
 440 {
 441         struct active_request_slot *slot;
 442         struct slot_results results;
 443         struct curl_slist *dav_headers;
 444         int rc = 0;
 445
 446         lock->refreshing = 1;
 447
 448         dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
 449
 450         slot = get_active_slot();
 451         slot->results = &results;
 452         curl_setup_http_get(slot->curl, lock->url, DAV_LOCK);
 453         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
 454
 455         if (start_active_slot(slot)) {
 456                 run_active_slot(slot);
 457                 if (results.curl_result != CURLE_OK) {
 458                         fprintf(stderr, "LOCK HTTP error %ld\n",
 459                                 results.http_code);
 460                 } else {
 461                         lock->start_time = time(NULL);
 462                         rc = 1;
 463                 }
 464         }
 465
 466         lock->refreshing = 0;
 467         curl_slist_free_all(dav_headers);
 468
 469         return rc;
 470 }
 471
 472 static void check_locks(void)
 473 {
 474         struct remote_lock *lock = repo->locks;
 475         time_t current_time = time(NULL);
 476         int time_remaining;
 477
 478         while (lock) {
 479                 time_remaining = lock->start_time + lock->timeout -
 480                         current_time;
 481                 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
 482                         if (!refresh_lock(lock)) {
 483                                 fprintf(stderr,
 484                                         "Unable to refresh lock for %s\n",
 485                                         lock->url);
 486                                 aborted = 1;
 487                                 return;
 488                         }
 489                 }
 490                 lock = lock->next;
 491         }
 492 }
 493
 494 static void release_request(struct transfer_request *request)
 495 {
 496         struct transfer_request *entry = request_queue_head;
 497
 498         if (request == request_queue_head) {
 499                 request_queue_head = request->next;
 500         } else {
 501                 while (entry->next != NULL && entry->next != request)
 502                         entry = entry->next;
 503                 if (entry->next == request)
 504                         entry->next = entry->next->next;
 505         }
 506
 507         free(request->url);
 508         free(request);
 509 }
 510
 511 static void finish_request(struct transfer_request *request)
 512 {
 513         struct http_pack_request *preq;
 514         struct http_object_request *obj_req;
 515
 516         request->curl_result = request->slot->curl_result;
 517         request->http_code = request->slot->http_code;
 518         request->slot = NULL;
 519
 520         /* Keep locks active */
 521         check_locks();
 522
 523         if (request->headers != NULL)
 524                 curl_slist_free_all(request->headers);
 525
 526         /* URL is reused for MOVE after PUT */
 527         if (request->state != RUN_PUT) {
 528                 free(request->url);
 529                 request->url = NULL;
 530         }
 531
 532         if (request->state == RUN_MKCOL) {
 533                 if (request->curl_result == CURLE_OK ||
 534                     request->http_code == 405) {
 535                         remote_dir_exists[request->obj->sha1[0]] = 1;
 536                         start_put(request);
 537                 } else {
 538                         fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
 539                                 sha1_to_hex(request->obj->sha1),
 540                                 request->curl_result, request->http_code);
 541                         request->state = ABORTED;
 542                         aborted = 1;
 543                 }
 544         } else if (request->state == RUN_PUT) {
 545                 if (request->curl_result == CURLE_OK) {
 546                         start_move(request);
 547                 } else {
 548                         fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
 549                                 sha1_to_hex(request->obj->sha1),
 550                                 request->curl_result, request->http_code);
 551                         request->state = ABORTED;
 552                         aborted = 1;
 553                 }
 554         } else if (request->state == RUN_MOVE) {
 555                 if (request->curl_result == CURLE_OK) {
 556                         if (push_verbosely)
 557                                 fprintf(stderr, "    sent %s\n",
 558                                         sha1_to_hex(request->obj->sha1));
 559                         request->obj->flags |= REMOTE;
 560                         release_request(request);
 561                 } else {
 562                         fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
 563                                 sha1_to_hex(request->obj->sha1),
 564                                 request->curl_result, request->http_code);
 565                         request->state = ABORTED;
 566                         aborted = 1;
 567                 }
 568         } else if (request->state == RUN_FETCH_LOOSE) {
 569                 obj_req = (struct http_object_request *)request->userData;
 570
 571                 if (finish_http_object_request(obj_req) == 0)
 572                         if (obj_req->rename == 0)
 573                                 request->obj->flags |= (LOCAL | REMOTE);
 574
 575                 /* Try fetching packed if necessary */
 576                 if (request->obj->flags & LOCAL) {
 577                         release_http_object_request(obj_req);
 578                         release_request(request);
 579                 } else
 580                         start_fetch_packed(request);
 581
 582         } else if (request->state == RUN_FETCH_PACKED) {
 583                 int fail = 1;
 584                 if (request->curl_result != CURLE_OK) {
 585                         fprintf(stderr, "Unable to get pack file %s\n%s",
 586                                 request->url, curl_errorstr);
 587                 } else {
 588                         preq = (struct http_pack_request *)request->userData;
 589
 590                         if (preq) {
 591                                 if (finish_http_pack_request(preq) == 0)
 592                                         fail = 0;
 593                                 release_http_pack_request(preq);
 594                         }
 595                 }
 596                 if (fail)
 597                         repo->can_update_info_refs = 0;
 598                 release_request(request);
 599         }
 600 }
 601
 602 #ifdef USE_CURL_MULTI
 603 static int is_running_queue;
 604 static int fill_active_slot(void *unused)
 605 {
 606         struct transfer_request *request;
 607
 608         if (aborted || !is_running_queue)
 609                 return 0;
 610
 611         for (request = request_queue_head; request; request = request->next) {
 612                 if (request->state == NEED_FETCH) {
 613                         start_fetch_loose(request);
 614                         return 1;
 615                 } else if (pushing && request->state == NEED_PUSH) {
 616                         if (remote_dir_exists[request->obj->sha1[0]] == 1) {
 617                                 start_put(request);
 618                         } else {
 619                                 start_mkcol(request);
 620                         }
 621                         return 1;
 622                 }
 623         }
 624         return 0;
 625 }
 626 #endif
 627
 628 static void get_remote_object_list(unsigned char parent);
 629
 630 static void add_fetch_request(struct object *obj)
 631 {
 632         struct transfer_request *request;
 633
 634         check_locks();
 635
 636         /*
 637          * Don't fetch the object if it's known to exist locally
 638          * or is already in the request queue
 639          */
 640         if (remote_dir_exists[obj->sha1[0]] == -1)
 641                 get_remote_object_list(obj->sha1[0]);
 642         if (obj->flags & (LOCAL | FETCHING))
 643                 return;
 644
 645         obj->flags |= FETCHING;
 646         request = xmalloc(sizeof(*request));
 647         request->obj = obj;
 648         request->url = NULL;
 649         request->lock = NULL;
 650         request->headers = NULL;
 651         request->state = NEED_FETCH;
 652         request->next = request_queue_head;
 653         request_queue_head = request;
 654
 655 #ifdef USE_CURL_MULTI
 656         fill_active_slots();
 657         step_active_slots();
 658 #endif
 659 }
 660
 661 static int add_send_request(struct object *obj, struct remote_lock *lock)
 662 {
 663         struct transfer_request *request;
 664         struct packed_git *target;
 665
 666         /* Keep locks active */
 667         check_locks();
 668
 669         /*
 670          * Don't push the object if it's known to exist on the remote
 671          * or is already in the request queue
 672          */
 673         if (remote_dir_exists[obj->sha1[0]] == -1)
 674                 get_remote_object_list(obj->sha1[0]);
 675         if (obj->flags & (REMOTE | PUSHING))
 676                 return 0;
 677         target = find_sha1_pack(obj->sha1, repo->packs);
 678         if (target) {
 679                 obj->flags |= REMOTE;
 680                 return 0;
 681         }
 682
 683         obj->flags |= PUSHING;
 684         request = xmalloc(sizeof(*request));
 685         request->obj = obj;
 686         request->url = NULL;
 687         request->lock = lock;
 688         request->headers = NULL;
 689         request->state = NEED_PUSH;
 690         request->next = request_queue_head;
 691         request_queue_head = request;
 692
 693 #ifdef USE_CURL_MULTI
 694         fill_active_slots();
 695         step_active_slots();
 696 #endif
 697
 698         return 1;
 699 }
 700
 701 static int fetch_indices(void)
 702 {
 703         int ret;
 704
 705         if (push_verbosely)
 706                 fprintf(stderr, "Getting pack list\n");
 707
 708         switch (http_get_info_packs(repo->url, &repo->packs)) {
 709         case HTTP_OK:
 710         case HTTP_MISSING_TARGET:
 711                 ret = 0;
 712                 break;
 713         default:
 714                 ret = -1;
 715         }
 716
 717         return ret;
 718 }
 719
 720 static void one_remote_object(const unsigned char *sha1)
 721 {
 722         struct object *obj;
 723
 724         obj = lookup_object(sha1);
 725         if (!obj)
 726                 obj = parse_object(sha1);
 727
 728         /* Ignore remote objects that don't exist locally */
 729         if (!obj)
 730                 return;
 731
 732         obj->flags |= REMOTE;
 733         if (!object_list_contains(objects, obj))
 734                 object_list_insert(obj, &objects);
 735 }
 736
 737 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
 738 {
 739         int *lock_flags = (int *)ctx->userData;
 740
 741         if (tag_closed) {
 742                 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
 743                         if ((*lock_flags & DAV_PROP_LOCKEX) &&
 744                             (*lock_flags & DAV_PROP_LOCKWR)) {
 745                                 *lock_flags |= DAV_LOCK_OK;
 746                         }
 747                         *lock_flags &= DAV_LOCK_OK;
 748                 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
 749                         *lock_flags |= DAV_PROP_LOCKWR;
 750                 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
 751                         *lock_flags |= DAV_PROP_LOCKEX;
 752                 }
 753         }
 754 }
 755
 756 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
 757 {
 758         struct remote_lock *lock = (struct remote_lock *)ctx->userData;
 759         git_SHA_CTX sha_ctx;
 760         unsigned char lock_token_sha1[20];
 761
 762         if (tag_closed && ctx->cdata) {
 763                 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
 764                         lock->owner = xstrdup(ctx->cdata);
 765                 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
 766                         const char *arg;
 767                         if (skip_prefix(ctx->cdata, "Second-", &arg))
 768                                 lock->timeout = strtol(arg, NULL, 10);
 769                 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
 770                         lock->token = xstrdup(ctx->cdata);
 771
 772                         git_SHA1_Init(&sha_ctx);
 773                         git_SHA1_Update(&sha_ctx, lock->token, strlen(lock->token));
 774                         git_SHA1_Final(lock_token_sha1, &sha_ctx);
 775
 776                         lock->tmpfile_suffix[0] = '_';
 777                         memcpy(lock->tmpfile_suffix + 1, sha1_to_hex(lock_token_sha1), 40);
 778                 }
 779         }
 780 }
 781
 782 static void one_remote_ref(const char *refname);
 783
 784 static void
 785 xml_start_tag(void *userData, const char *name, const char **atts)
 786 {
 787         struct xml_ctx *ctx = (struct xml_ctx *)userData;
 788         const char *c = strchr(name, ':');
 789         int new_len;
 790
 791         if (c == NULL)
 792                 c = name;
 793         else
 794                 c++;
 795
 796         new_len = strlen(ctx->name) + strlen(c) + 2;
 797
 798         if (new_len > ctx->len) {
 799                 ctx->name = xrealloc(ctx->name, new_len);
 800                 ctx->len = new_len;
 801         }
 802         strcat(ctx->name, ".");
 803         strcat(ctx->name, c);
 804
 805         free(ctx->cdata);
 806         ctx->cdata = NULL;
 807
 808         ctx->userFunc(ctx, 0);
 809 }
 810
 811 static void
 812 xml_end_tag(void *userData, const char *name)
 813 {
 814         struct xml_ctx *ctx = (struct xml_ctx *)userData;
 815         const char *c = strchr(name, ':');
 816         char *ep;
 817
 818         ctx->userFunc(ctx, 1);
 819
 820         if (c == NULL)
 821                 c = name;
 822         else
 823                 c++;
 824
 825         ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
 826         *ep = 0;
 827 }
 828
 829 static void
 830 xml_cdata(void *userData, const XML_Char *s, int len)
 831 {
 832         struct xml_ctx *ctx = (struct xml_ctx *)userData;
 833         free(ctx->cdata);
 834         ctx->cdata = xmemdupz(s, len);
 835 }
 836
 837 static struct remote_lock *lock_remote(const char *path, long timeout)
 838 {
 839         struct active_request_slot *slot;
 840         struct slot_results results;
 841         struct buffer out_buffer = { STRBUF_INIT, 0 };
 842         struct strbuf in_buffer = STRBUF_INIT;
 843         char *url;
 844         char *ep;
 845         char timeout_header[25];
 846         struct remote_lock *lock = NULL;
 847         struct curl_slist *dav_headers = NULL;
 848         struct xml_ctx ctx;
 849         char *escaped;
 850
 851         url = xstrfmt("%s%s", repo->url, path);
 852
 853         /* Make sure leading directories exist for the remote ref */
 854         ep = strchr(url + strlen(repo->url) + 1, '/');
 855         while (ep) {
 856                 char saved_character = ep[1];
 857                 ep[1] = '\0';
 858                 slot = get_active_slot();
 859                 slot->results = &results;
 860                 curl_setup_http_get(slot->curl, url, DAV_MKCOL);
 861                 if (start_active_slot(slot)) {
 862                         run_active_slot(slot);
 863                         if (results.curl_result != CURLE_OK &&
 864                             results.http_code != 405) {
 865                                 fprintf(stderr,
 866                                         "Unable to create branch path %s\n",
 867                                         url);
 868                                 free(url);
 869                                 return NULL;
 870                         }
 871                 } else {
 872                         fprintf(stderr, "Unable to start MKCOL request\n");
 873                         free(url);
 874                         return NULL;
 875                 }
 876                 ep[1] = saved_character;
 877                 ep = strchr(ep + 1, '/');
 878         }
 879
 880         escaped = xml_entities(ident_default_email());
 881         strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
 882         free(escaped);
 883
 884         sprintf(timeout_header, "Timeout: Second-%ld", timeout);
 885         dav_headers = curl_slist_append(dav_headers, timeout_header);
 886         dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
 887
 888         slot = get_active_slot();
 889         slot->results = &results;
 890         curl_setup_http(slot->curl, url, DAV_LOCK, &out_buffer, fwrite_buffer);
 891         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
 892         curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
 893
 894         lock = xcalloc(1, sizeof(*lock));
 895         lock->timeout = -1;
 896
 897         if (start_active_slot(slot)) {
 898                 run_active_slot(slot);
 899                 if (results.curl_result == CURLE_OK) {
 900                         XML_Parser parser = XML_ParserCreate(NULL);
 901                         enum XML_Status result;
 902                         ctx.name = xcalloc(10, 1);
 903                         ctx.len = 0;
 904                         ctx.cdata = NULL;
 905                         ctx.userFunc = handle_new_lock_ctx;
 906                         ctx.userData = lock;
 907                         XML_SetUserData(parser, &ctx);
 908                         XML_SetElementHandler(parser, xml_start_tag,
 909                                               xml_end_tag);
 910                         XML_SetCharacterDataHandler(parser, xml_cdata);
 911                         result = XML_Parse(parser, in_buffer.buf,
 912                                            in_buffer.len, 1);
 913                         free(ctx.name);
 914                         if (result != XML_STATUS_OK) {
 915                                 fprintf(stderr, "XML error: %s\n",
 916                                         XML_ErrorString(
 917                                                 XML_GetErrorCode(parser)));
 918                                 lock->timeout = -1;
 919                         }
 920                         XML_ParserFree(parser);
 921                 }
 922         } else {
 923                 fprintf(stderr, "Unable to start LOCK request\n");
 924         }
 925
 926         curl_slist_free_all(dav_headers);
 927         strbuf_release(&out_buffer.buf);
 928         strbuf_release(&in_buffer);
 929
 930         if (lock->token == NULL || lock->timeout <= 0) {
 931                 free(lock->token);
 932                 free(lock->owner);
 933                 free(url);
 934                 free(lock);
 935                 lock = NULL;
 936         } else {
 937                 lock->url = url;
 938                 lock->start_time = time(NULL);
 939                 lock->next = repo->locks;
 940                 repo->locks = lock;
 941         }
 942
 943         return lock;
 944 }
 945
 946 static int unlock_remote(struct remote_lock *lock)
 947 {
 948         struct active_request_slot *slot;
 949         struct slot_results results;
 950         struct remote_lock *prev = repo->locks;
 951         struct curl_slist *dav_headers;
 952         int rc = 0;
 953
 954         dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
 955
 956         slot = get_active_slot();
 957         slot->results = &results;
 958         curl_setup_http_get(slot->curl, lock->url, DAV_UNLOCK);
 959         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
 960
 961         if (start_active_slot(slot)) {
 962                 run_active_slot(slot);
 963                 if (results.curl_result == CURLE_OK)
 964                         rc = 1;
 965                 else
 966                         fprintf(stderr, "UNLOCK HTTP error %ld\n",
 967                                 results.http_code);
 968         } else {
 969                 fprintf(stderr, "Unable to start UNLOCK request\n");
 970         }
 971
 972         curl_slist_free_all(dav_headers);
 973
 974         if (repo->locks == lock) {
 975                 repo->locks = lock->next;
 976         } else {
 977                 while (prev && prev->next != lock)
 978                         prev = prev->next;
 979                 if (prev)
 980                         prev->next = prev->next->next;
 981         }
 982
 983         free(lock->owner);
 984         free(lock->url);
 985         free(lock->token);
 986         free(lock);
 987
 988         return rc;
 989 }
 990
 991 static void remove_locks(void)
 992 {
 993         struct remote_lock *lock = repo->locks;
 994
 995         fprintf(stderr, "Removing remote locks...\n");
 996         while (lock) {
 997                 struct remote_lock *next = lock->next;
 998                 unlock_remote(lock);
 999                 lock = next;
1000         }
1001 }
1002
1003 static void remove_locks_on_signal(int signo)
1004 {
1005         remove_locks();
1006         sigchain_pop(signo);
1007         raise(signo);
1008 }
1009
1010 static void remote_ls(const char *path, int flags,
1011                       void (*userFunc)(struct remote_ls_ctx *ls),
1012                       void *userData);
1013
1014 /* extract hex from sharded "xx/x{40}" filename */
1015 static int get_sha1_hex_from_objpath(const char *path, unsigned char *sha1)
1016 {
1017         char hex[40];
1018
1019         if (strlen(path) != 41)
1020                 return -1;
1021
1022         memcpy(hex, path, 2);
1023         path += 2;
1024         path++; /* skip '/' */
1025         memcpy(hex, path, 38);
1026
1027         return get_sha1_hex(hex, sha1);
1028 }
1029
1030 static void process_ls_object(struct remote_ls_ctx *ls)
1031 {
1032         unsigned int *parent = (unsigned int *)ls->userData;
1033         const char *path = ls->dentry_name;
1034         unsigned char sha1[20];
1035
1036         if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1037                 remote_dir_exists[*parent] = 1;
1038                 return;
1039         }
1040
1041         if (!skip_prefix(path, "objects/", &path) ||
1042             get_sha1_hex_from_objpath(path, sha1))
1043                 return;
1044
1045         one_remote_object(sha1);
1046 }
1047
1048 static void process_ls_ref(struct remote_ls_ctx *ls)
1049 {
1050         if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1051                 fprintf(stderr, "  %s\n", ls->dentry_name);
1052                 return;
1053         }
1054
1055         if (!(ls->dentry_flags & IS_DIR))
1056                 one_remote_ref(ls->dentry_name);
1057 }
1058
1059 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1060 {
1061         struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1062
1063         if (tag_closed) {
1064                 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1065                         if (ls->dentry_flags & IS_DIR) {
1066
1067                                 /* ensure collection names end with slash */
1068                                 str_end_url_with_slash(ls->dentry_name, &ls->dentry_name);
1069
1070                                 if (ls->flags & PROCESS_DIRS) {
1071                                         ls->userFunc(ls);
1072                                 }
1073                                 if (strcmp(ls->dentry_name, ls->path) &&
1074                                     ls->flags & RECURSIVE) {
1075                                         remote_ls(ls->dentry_name,
1076                                                   ls->flags,
1077                                                   ls->userFunc,
1078                                                   ls->userData);
1079                                 }
1080                         } else if (ls->flags & PROCESS_FILES) {
1081                                 ls->userFunc(ls);
1082                         }
1083                 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1084                         char *path = ctx->cdata;
1085                         if (*ctx->cdata == 'h') {
1086                                 path = strstr(path, "//");
1087                                 if (path) {
1088                                         path = strchr(path+2, '/');
1089                                 }
1090                         }
1091                         if (path) {
1092                                 const char *url = repo->url;
1093                                 if (repo->path)
1094                                         url = repo->path;
1095                                 if (strncmp(path, url, repo->path_len))
1096                                         error("Parsed path '%s' does not match url: '%s'",
1097                                               path, url);
1098                                 else {
1099                                         path += repo->path_len;
1100                                         ls->dentry_name = xstrdup(path);
1101                                 }
1102                         }
1103                 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1104                         ls->dentry_flags |= IS_DIR;
1105                 }
1106         } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1107                 free(ls->dentry_name);
1108                 ls->dentry_name = NULL;
1109                 ls->dentry_flags = 0;
1110         }
1111 }
1112
1113 /*
1114  * NEEDSWORK: remote_ls() ignores info/refs on the remote side.  But it
1115  * should _only_ heed the information from that file, instead of trying to
1116  * determine the refs from the remote file system (badly: it does not even
1117  * know about packed-refs).
1118  */
1119 static void remote_ls(const char *path, int flags,
1120                       void (*userFunc)(struct remote_ls_ctx *ls),
1121                       void *userData)
1122 {
1123         char *url = xstrfmt("%s%s", repo->url, path);
1124         struct active_request_slot *slot;
1125         struct slot_results results;
1126         struct strbuf in_buffer = STRBUF_INIT;
1127         struct buffer out_buffer = { STRBUF_INIT, 0 };
1128         struct curl_slist *dav_headers = NULL;
1129         struct xml_ctx ctx;
1130         struct remote_ls_ctx ls;
1131
1132         ls.flags = flags;
1133         ls.path = xstrdup(path);
1134         ls.dentry_name = NULL;
1135         ls.dentry_flags = 0;
1136         ls.userData = userData;
1137         ls.userFunc = userFunc;
1138
1139         strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1140
1141         dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1142         dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1143
1144         slot = get_active_slot();
1145         slot->results = &results;
1146         curl_setup_http(slot->curl, url, DAV_PROPFIND,
1147                         &out_buffer, fwrite_buffer);
1148         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1149         curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1150
1151         if (start_active_slot(slot)) {
1152                 run_active_slot(slot);
1153                 if (results.curl_result == CURLE_OK) {
1154                         XML_Parser parser = XML_ParserCreate(NULL);
1155                         enum XML_Status result;
1156                         ctx.name = xcalloc(10, 1);
1157                         ctx.len = 0;
1158                         ctx.cdata = NULL;
1159                         ctx.userFunc = handle_remote_ls_ctx;
1160                         ctx.userData = &ls;
1161                         XML_SetUserData(parser, &ctx);
1162                         XML_SetElementHandler(parser, xml_start_tag,
1163                                               xml_end_tag);
1164                         XML_SetCharacterDataHandler(parser, xml_cdata);
1165                         result = XML_Parse(parser, in_buffer.buf,
1166                                            in_buffer.len, 1);
1167                         free(ctx.name);
1168
1169                         if (result != XML_STATUS_OK) {
1170                                 fprintf(stderr, "XML error: %s\n",
1171                                         XML_ErrorString(
1172                                                 XML_GetErrorCode(parser)));
1173                         }
1174                         XML_ParserFree(parser);
1175                 }
1176         } else {
1177                 fprintf(stderr, "Unable to start PROPFIND request\n");
1178         }
1179
1180         free(ls.path);
1181         free(url);
1182         strbuf_release(&out_buffer.buf);
1183         strbuf_release(&in_buffer);
1184         curl_slist_free_all(dav_headers);
1185 }
1186
1187 static void get_remote_object_list(unsigned char parent)
1188 {
1189         char path[] = "objects/XX/";
1190         static const char hex[] = "0123456789abcdef";
1191         unsigned int val = parent;
1192
1193         path[8] = hex[val >> 4];
1194         path[9] = hex[val & 0xf];
1195         remote_dir_exists[val] = 0;
1196         remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1197                   process_ls_object, &val);
1198 }
1199
1200 static int locking_available(void)
1201 {
1202         struct active_request_slot *slot;
1203         struct slot_results results;
1204         struct strbuf in_buffer = STRBUF_INIT;
1205         struct buffer out_buffer = { STRBUF_INIT, 0 };
1206         struct curl_slist *dav_headers = NULL;
1207         struct xml_ctx ctx;
1208         int lock_flags = 0;
1209         char *escaped;
1210
1211         escaped = xml_entities(repo->url);
1212         strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
1213         free(escaped);
1214
1215         dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1216         dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1217
1218         slot = get_active_slot();
1219         slot->results = &results;
1220         curl_setup_http(slot->curl, repo->url, DAV_PROPFIND,
1221                         &out_buffer, fwrite_buffer);
1222         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1223         curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1224
1225         if (start_active_slot(slot)) {
1226                 run_active_slot(slot);
1227                 if (results.curl_result == CURLE_OK) {
1228                         XML_Parser parser = XML_ParserCreate(NULL);
1229                         enum XML_Status result;
1230                         ctx.name = xcalloc(10, 1);
1231                         ctx.len = 0;
1232                         ctx.cdata = NULL;
1233                         ctx.userFunc = handle_lockprop_ctx;
1234                         ctx.userData = &lock_flags;
1235                         XML_SetUserData(parser, &ctx);
1236                         XML_SetElementHandler(parser, xml_start_tag,
1237                                               xml_end_tag);
1238                         result = XML_Parse(parser, in_buffer.buf,
1239                                            in_buffer.len, 1);
1240                         free(ctx.name);
1241
1242                         if (result != XML_STATUS_OK) {
1243                                 fprintf(stderr, "XML error: %s\n",
1244                                         XML_ErrorString(
1245                                                 XML_GetErrorCode(parser)));
1246                                 lock_flags = 0;
1247                         }
1248                         XML_ParserFree(parser);
1249                         if (!lock_flags)
1250                                 error("no DAV locking support on %s",
1251                                       repo->url);
1252
1253                 } else {
1254                         error("Cannot access URL %s, return code %d",
1255                               repo->url, results.curl_result);
1256                         lock_flags = 0;
1257                 }
1258         } else {
1259                 error("Unable to start PROPFIND request on %s", repo->url);
1260         }
1261
1262         strbuf_release(&out_buffer.buf);
1263         strbuf_release(&in_buffer);
1264         curl_slist_free_all(dav_headers);
1265
1266         return lock_flags;
1267 }
1268
1269 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1270 {
1271         struct object_list *entry = xmalloc(sizeof(struct object_list));
1272         entry->item = obj;
1273         entry->next = *p;
1274         *p = entry;
1275         return &entry->next;
1276 }
1277
1278 static struct object_list **process_blob(struct blob *blob,
1279                                          struct object_list **p)
1280 {
1281         struct object *obj = &blob->object;
1282
1283         obj->flags |= LOCAL;
1284
1285         if (obj->flags & (UNINTERESTING | SEEN))
1286                 return p;
1287
1288         obj->flags |= SEEN;
1289         return add_one_object(obj, p);
1290 }
1291
1292 static struct object_list **process_tree(struct tree *tree,
1293                                          struct object_list **p)
1294 {
1295         struct object *obj = &tree->object;
1296         struct tree_desc desc;
1297         struct name_entry entry;
1298
1299         obj->flags |= LOCAL;
1300
1301         if (obj->flags & (UNINTERESTING | SEEN))
1302                 return p;
1303         if (parse_tree(tree) < 0)
1304                 die("bad tree object %s", sha1_to_hex(obj->sha1));
1305
1306         obj->flags |= SEEN;
1307         p = add_one_object(obj, p);
1308
1309         init_tree_desc(&desc, tree->buffer, tree->size);
1310
1311         while (tree_entry(&desc, &entry))
1312                 switch (object_type(entry.mode)) {
1313                 case OBJ_TREE:
1314                         p = process_tree(lookup_tree(entry.sha1), p);
1315                         break;
1316                 case OBJ_BLOB:
1317                         p = process_blob(lookup_blob(entry.sha1), p);
1318                         break;
1319                 default:
1320                         /* Subproject commit - not in this repository */
1321                         break;
1322                 }
1323
1324         free_tree_buffer(tree);
1325         return p;
1326 }
1327
1328 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1329 {
1330         int i;
1331         struct commit *commit;
1332         struct object_list **p = &objects;
1333         int count = 0;
1334
1335         while ((commit = get_revision(revs)) != NULL) {
1336                 p = process_tree(commit->tree, p);
1337                 commit->object.flags |= LOCAL;
1338                 if (!(commit->object.flags & UNINTERESTING))
1339                         count += add_send_request(&commit->object, lock);
1340         }
1341
1342         for (i = 0; i < revs->pending.nr; i++) {
1343                 struct object_array_entry *entry = revs->pending.objects + i;
1344                 struct object *obj = entry->item;
1345                 const char *name = entry->name;
1346
1347                 if (obj->flags & (UNINTERESTING | SEEN))
1348                         continue;
1349                 if (obj->type == OBJ_TAG) {
1350                         obj->flags |= SEEN;
1351                         p = add_one_object(obj, p);
1352                         continue;
1353                 }
1354                 if (obj->type == OBJ_TREE) {
1355                         p = process_tree((struct tree *)obj, p);
1356                         continue;
1357                 }
1358                 if (obj->type == OBJ_BLOB) {
1359                         p = process_blob((struct blob *)obj, p);
1360                         continue;
1361                 }
1362                 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1363         }
1364
1365         while (objects) {
1366                 if (!(objects->item->flags & UNINTERESTING))
1367                         count += add_send_request(objects->item, lock);
1368                 objects = objects->next;
1369         }
1370
1371         return count;
1372 }
1373
1374 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1375 {
1376         struct active_request_slot *slot;
1377         struct slot_results results;
1378         struct buffer out_buffer = { STRBUF_INIT, 0 };
1379         struct curl_slist *dav_headers;
1380
1381         dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1382
1383         strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1384
1385         slot = get_active_slot();
1386         slot->results = &results;
1387         curl_setup_http(slot->curl, lock->url, DAV_PUT,
1388                         &out_buffer, fwrite_null);
1389         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1390
1391         if (start_active_slot(slot)) {
1392                 run_active_slot(slot);
1393                 strbuf_release(&out_buffer.buf);
1394                 if (results.curl_result != CURLE_OK) {
1395                         fprintf(stderr,
1396                                 "PUT error: curl result=%d, HTTP code=%ld\n",
1397                                 results.curl_result, results.http_code);
1398                         /* We should attempt recovery? */
1399                         return 0;
1400                 }
1401         } else {
1402                 strbuf_release(&out_buffer.buf);
1403                 fprintf(stderr, "Unable to start PUT request\n");
1404                 return 0;
1405         }
1406
1407         return 1;
1408 }
1409
1410 static struct ref *remote_refs;
1411
1412 static void one_remote_ref(const char *refname)
1413 {
1414         struct ref *ref;
1415         struct object *obj;
1416
1417         ref = alloc_ref(refname);
1418
1419         if (http_fetch_ref(repo->url, ref) != 0) {
1420                 fprintf(stderr,
1421                         "Unable to fetch ref %s from %s\n",
1422                         refname, repo->url);
1423                 free(ref);
1424                 return;
1425         }
1426
1427         /*
1428          * Fetch a copy of the object if it doesn't exist locally - it
1429          * may be required for updating server info later.
1430          */
1431         if (repo->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
1432                 obj = lookup_unknown_object(ref->old_sha1);
1433                 if (obj) {
1434                         fprintf(stderr, "  fetch %s for %s\n",
1435                                 sha1_to_hex(ref->old_sha1), refname);
1436                         add_fetch_request(obj);
1437                 }
1438         }
1439
1440         ref->next = remote_refs;
1441         remote_refs = ref;
1442 }
1443
1444 static void get_dav_remote_heads(void)
1445 {
1446         remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1447 }
1448
1449 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1450 {
1451         struct strbuf *buf = (struct strbuf *)ls->userData;
1452         struct object *o;
1453         int len;
1454         char *ref_info;
1455         struct ref *ref;
1456
1457         ref = alloc_ref(ls->dentry_name);
1458
1459         if (http_fetch_ref(repo->url, ref) != 0) {
1460                 fprintf(stderr,
1461                         "Unable to fetch ref %s from %s\n",
1462                         ls->dentry_name, repo->url);
1463                 aborted = 1;
1464                 free(ref);
1465                 return;
1466         }
1467
1468         o = parse_object(ref->old_sha1);
1469         if (!o) {
1470                 fprintf(stderr,
1471                         "Unable to parse object %s for remote ref %s\n",
1472                         sha1_to_hex(ref->old_sha1), ls->dentry_name);
1473                 aborted = 1;
1474                 free(ref);
1475                 return;
1476         }
1477
1478         len = strlen(ls->dentry_name) + 42;
1479         ref_info = xcalloc(len + 1, 1);
1480         sprintf(ref_info, "%s   %s\n",
1481                 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1482         fwrite_buffer(ref_info, 1, len, buf);
1483         free(ref_info);
1484
1485         if (o->type == OBJ_TAG) {
1486                 o = deref_tag(o, ls->dentry_name, 0);
1487                 if (o) {
1488                         len = strlen(ls->dentry_name) + 45;
1489                         ref_info = xcalloc(len + 1, 1);
1490                         sprintf(ref_info, "%s   %s^{}\n",
1491                                 sha1_to_hex(o->sha1), ls->dentry_name);
1492                         fwrite_buffer(ref_info, 1, len, buf);
1493                         free(ref_info);
1494                 }
1495         }
1496         free(ref);
1497 }
1498
1499 static void update_remote_info_refs(struct remote_lock *lock)
1500 {
1501         struct buffer buffer = { STRBUF_INIT, 0 };
1502         struct active_request_slot *slot;
1503         struct slot_results results;
1504         struct curl_slist *dav_headers;
1505
1506         remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1507                   add_remote_info_ref, &buffer.buf);
1508         if (!aborted) {
1509                 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1510
1511                 slot = get_active_slot();
1512                 slot->results = &results;
1513                 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1514                                 &buffer, fwrite_null);
1515                 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1516
1517                 if (start_active_slot(slot)) {
1518                         run_active_slot(slot);
1519                         if (results.curl_result != CURLE_OK) {
1520                                 fprintf(stderr,
1521                                         "PUT error: curl result=%d, HTTP code=%ld\n",
1522                                         results.curl_result, results.http_code);
1523                         }
1524                 }
1525         }
1526         strbuf_release(&buffer.buf);
1527 }
1528
1529 static int remote_exists(const char *path)
1530 {
1531         char *url = xstrfmt("%s%s", repo->url, path);
1532         int ret;
1533
1534
1535         switch (http_get_strbuf(url, NULL, NULL)) {
1536         case HTTP_OK:
1537                 ret = 1;
1538                 break;
1539         case HTTP_MISSING_TARGET:
1540                 ret = 0;
1541                 break;
1542         case HTTP_ERROR:
1543                 error("unable to access '%s': %s", url, curl_errorstr);
1544         default:
1545                 ret = -1;
1546         }
1547         free(url);
1548         return ret;
1549 }
1550
1551 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
1552 {
1553         char *url = xstrfmt("%s%s", repo->url, path);
1554         struct strbuf buffer = STRBUF_INIT;
1555         const char *name;
1556
1557         if (http_get_strbuf(url, &buffer, NULL) != HTTP_OK)
1558                 die("Couldn't get %s for remote symref\n%s", url,
1559                     curl_errorstr);
1560         free(url);
1561
1562         free(*symref);
1563         *symref = NULL;
1564         hashclr(sha1);
1565
1566         if (buffer.len == 0)
1567                 return;
1568
1569         /* Cut off trailing newline. */
1570         strbuf_rtrim(&buffer);
1571
1572         /* If it's a symref, set the refname; otherwise try for a sha1 */
1573         if (skip_prefix(buffer.buf, "ref: ", &name)) {
1574                 *symref = xmemdupz(name, buffer.len - (name - buffer.buf));
1575         } else {
1576                 get_sha1_hex(buffer.buf, sha1);
1577         }
1578
1579         strbuf_release(&buffer);
1580 }
1581
1582 static int verify_merge_base(unsigned char *head_sha1, struct ref *remote)
1583 {
1584         struct commit *head = lookup_commit_or_die(head_sha1, "HEAD");
1585         struct commit *branch = lookup_commit_or_die(remote->old_sha1, remote->name);
1586
1587         return in_merge_bases(branch, head);
1588 }
1589
1590 static int delete_remote_branch(const char *pattern, int force)
1591 {
1592         struct ref *refs = remote_refs;
1593         struct ref *remote_ref = NULL;
1594         unsigned char head_sha1[20];
1595         char *symref = NULL;
1596         int match;
1597         int patlen = strlen(pattern);
1598         int i;
1599         struct active_request_slot *slot;
1600         struct slot_results results;
1601         char *url;
1602
1603         /* Find the remote branch(es) matching the specified branch name */
1604         for (match = 0; refs; refs = refs->next) {
1605                 char *name = refs->name;
1606                 int namelen = strlen(name);
1607                 if (namelen < patlen ||
1608                     memcmp(name + namelen - patlen, pattern, patlen))
1609                         continue;
1610                 if (namelen != patlen && name[namelen - patlen - 1] != '/')
1611                         continue;
1612                 match++;
1613                 remote_ref = refs;
1614         }
1615         if (match == 0)
1616                 return error("No remote branch matches %s", pattern);
1617         if (match != 1)
1618                 return error("More than one remote branch matches %s",
1619                              pattern);
1620
1621         /*
1622          * Remote HEAD must be a symref (not exactly foolproof; a remote
1623          * symlink to a symref will look like a symref)
1624          */
1625         fetch_symref("HEAD", &symref, head_sha1);
1626         if (!symref)
1627                 return error("Remote HEAD is not a symref");
1628
1629         /* Remote branch must not be the remote HEAD */
1630         for (i = 0; symref && i < MAXDEPTH; i++) {
1631                 if (!strcmp(remote_ref->name, symref))
1632                         return error("Remote branch %s is the current HEAD",
1633                                      remote_ref->name);
1634                 fetch_symref(symref, &symref, head_sha1);
1635         }
1636
1637         /* Run extra sanity checks if delete is not forced */
1638         if (!force) {
1639                 /* Remote HEAD must resolve to a known object */
1640                 if (symref)
1641                         return error("Remote HEAD symrefs too deep");
1642                 if (is_null_sha1(head_sha1))
1643                         return error("Unable to resolve remote HEAD");
1644                 if (!has_sha1_file(head_sha1))
1645                         return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
1646
1647                 /* Remote branch must resolve to a known object */
1648                 if (is_null_sha1(remote_ref->old_sha1))
1649                         return error("Unable to resolve remote branch %s",
1650                                      remote_ref->name);
1651                 if (!has_sha1_file(remote_ref->old_sha1))
1652                         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));
1653
1654                 /* Remote branch must be an ancestor of remote HEAD */
1655                 if (!verify_merge_base(head_sha1, remote_ref)) {
1656                         return error("The branch '%s' is not an ancestor "
1657                                      "of your current HEAD.\n"
1658                                      "If you are sure you want to delete it,"
1659                                      " run:\n\t'git http-push -D %s %s'",
1660                                      remote_ref->name, repo->url, pattern);
1661                 }
1662         }
1663
1664         /* Send delete request */
1665         fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
1666         if (dry_run)
1667                 return 0;
1668         url = xstrfmt("%s%s", repo->url, remote_ref->name);
1669         slot = get_active_slot();
1670         slot->results = &results;
1671         curl_setup_http_get(slot->curl, url, DAV_DELETE);
1672         if (start_active_slot(slot)) {
1673                 run_active_slot(slot);
1674                 free(url);
1675                 if (results.curl_result != CURLE_OK)
1676                         return error("DELETE request failed (%d/%ld)",
1677                                      results.curl_result, results.http_code);
1678         } else {
1679                 free(url);
1680                 return error("Unable to start DELETE request");
1681         }
1682
1683         return 0;
1684 }
1685
1686 static void run_request_queue(void)
1687 {
1688 #ifdef USE_CURL_MULTI
1689         is_running_queue = 1;
1690         fill_active_slots();
1691         add_fill_function(NULL, fill_active_slot);
1692 #endif
1693         do {
1694                 finish_all_active_slots();
1695 #ifdef USE_CURL_MULTI
1696                 fill_active_slots();
1697 #endif
1698         } while (request_queue_head && !aborted);
1699
1700 #ifdef USE_CURL_MULTI
1701         is_running_queue = 0;
1702 #endif
1703 }
1704
1705 int main(int argc, char **argv)
1706 {
1707         struct transfer_request *request;
1708         struct transfer_request *next_request;
1709         int nr_refspec = 0;
1710         char **refspec = NULL;
1711         struct remote_lock *ref_lock = NULL;
1712         struct remote_lock *info_ref_lock = NULL;
1713         struct rev_info revs;
1714         int delete_branch = 0;
1715         int force_delete = 0;
1716         int objects_to_send;
1717         int rc = 0;
1718         int i;
1719         int new_refs;
1720         struct ref *ref, *local_refs;
1721
1722         git_setup_gettext();
1723
1724         git_extract_argv0_path(argv[0]);
1725
1726         repo = xcalloc(1, sizeof(*repo));
1727
1728         argv++;
1729         for (i = 1; i < argc; i++, argv++) {
1730                 char *arg = *argv;
1731
1732                 if (*arg == '-') {
1733                         if (!strcmp(arg, "--all")) {
1734                                 push_all = MATCH_REFS_ALL;
1735                                 continue;
1736                         }
1737                         if (!strcmp(arg, "--force")) {
1738                                 force_all = 1;
1739                                 continue;
1740                         }
1741                         if (!strcmp(arg, "--dry-run")) {
1742                                 dry_run = 1;
1743                                 continue;
1744                         }
1745                         if (!strcmp(arg, "--helper-status")) {
1746                                 helper_status = 1;
1747                                 continue;
1748                         }
1749                         if (!strcmp(arg, "--verbose")) {
1750                                 push_verbosely = 1;
1751                                 http_is_verbose = 1;
1752                                 continue;
1753                         }
1754                         if (!strcmp(arg, "-d")) {
1755                                 delete_branch = 1;
1756                                 continue;
1757                         }
1758                         if (!strcmp(arg, "-D")) {
1759                                 delete_branch = 1;
1760                                 force_delete = 1;
1761                                 continue;
1762                         }
1763                         if (!strcmp(arg, "-h"))
1764                                 usage(http_push_usage);
1765                 }
1766                 if (!repo->url) {
1767                         char *path = strstr(arg, "//");
1768                         str_end_url_with_slash(arg, &repo->url);
1769                         repo->path_len = strlen(repo->url);
1770                         if (path) {
1771                                 repo->path = strchr(path+2, '/');
1772                                 if (repo->path)
1773                                         repo->path_len = strlen(repo->path);
1774                         }
1775                         continue;
1776                 }
1777                 refspec = argv;
1778                 nr_refspec = argc - i;
1779                 break;
1780         }
1781
1782 #ifndef USE_CURL_MULTI
1783         die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
1784 #endif
1785
1786         if (!repo->url)
1787                 usage(http_push_usage);
1788
1789         if (delete_branch && nr_refspec != 1)
1790                 die("You must specify only one branch name when deleting a remote branch");
1791
1792         setup_git_directory();
1793
1794         memset(remote_dir_exists, -1, 256);
1795
1796         http_init(NULL, repo->url, 1);
1797
1798 #ifdef USE_CURL_MULTI
1799         is_running_queue = 0;
1800 #endif
1801
1802         /* Verify DAV compliance/lock support */
1803         if (!locking_available()) {
1804                 rc = 1;
1805                 goto cleanup;
1806         }
1807
1808         sigchain_push_common(remove_locks_on_signal);
1809
1810         /* Check whether the remote has server info files */
1811         repo->can_update_info_refs = 0;
1812         repo->has_info_refs = remote_exists("info/refs");
1813         repo->has_info_packs = remote_exists("objects/info/packs");
1814         if (repo->has_info_refs) {
1815                 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
1816                 if (info_ref_lock)
1817                         repo->can_update_info_refs = 1;
1818                 else {
1819                         error("cannot lock existing info/refs");
1820                         rc = 1;
1821                         goto cleanup;
1822                 }
1823         }
1824         if (repo->has_info_packs)
1825                 fetch_indices();
1826
1827         /* Get a list of all local and remote heads to validate refspecs */
1828         local_refs = get_local_heads();
1829         fprintf(stderr, "Fetching remote heads...\n");
1830         get_dav_remote_heads();
1831         run_request_queue();
1832
1833         /* Remove a remote branch if -d or -D was specified */
1834         if (delete_branch) {
1835                 if (delete_remote_branch(refspec[0], force_delete) == -1) {
1836                         fprintf(stderr, "Unable to delete remote branch %s\n",
1837                                 refspec[0]);
1838                         if (helper_status)
1839                                 printf("error %s cannot remove\n", refspec[0]);
1840                 }
1841                 goto cleanup;
1842         }
1843
1844         /* match them up */
1845         if (match_push_refs(local_refs, &remote_refs,
1846                             nr_refspec, (const char **) refspec, push_all)) {
1847                 rc = -1;
1848                 goto cleanup;
1849         }
1850         if (!remote_refs) {
1851                 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
1852                 if (helper_status)
1853                         printf("error null no match\n");
1854                 rc = 0;
1855                 goto cleanup;
1856         }
1857
1858         new_refs = 0;
1859         for (ref = remote_refs; ref; ref = ref->next) {
1860                 char old_hex[60], *new_hex;
1861                 const char *commit_argv[5];
1862                 int commit_argc;
1863                 char *new_sha1_hex, *old_sha1_hex;
1864
1865                 if (!ref->peer_ref)
1866                         continue;
1867
1868                 if (is_null_sha1(ref->peer_ref->new_sha1)) {
1869                         if (delete_remote_branch(ref->name, 1) == -1) {
1870                                 error("Could not remove %s", ref->name);
1871                                 if (helper_status)
1872                                         printf("error %s cannot remove\n", ref->name);
1873                                 rc = -4;
1874                         }
1875                         else if (helper_status)
1876                                 printf("ok %s\n", ref->name);
1877                         new_refs++;
1878                         continue;
1879                 }
1880
1881                 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
1882                         if (push_verbosely)
1883                                 fprintf(stderr, "'%s': up-to-date\n", ref->name);
1884                         if (helper_status)
1885                                 printf("ok %s up to date\n", ref->name);
1886                         continue;
1887                 }
1888
1889                 if (!force_all &&
1890                     !is_null_sha1(ref->old_sha1) &&
1891                     !ref->force) {
1892                         if (!has_sha1_file(ref->old_sha1) ||
1893                             !ref_newer(ref->peer_ref->new_sha1,
1894                                        ref->old_sha1)) {
1895                                 /*
1896                                  * We do not have the remote ref, or
1897                                  * we know that the remote ref is not
1898                                  * an ancestor of what we are trying to
1899                                  * push.  Either way this can be losing
1900                                  * commits at the remote end and likely
1901                                  * we were not up to date to begin with.
1902                                  */
1903                                 error("remote '%s' is not an ancestor of\n"
1904                                       "local '%s'.\n"
1905                                       "Maybe you are not up-to-date and "
1906                                       "need to pull first?",
1907                                       ref->name,
1908                                       ref->peer_ref->name);
1909                                 if (helper_status)
1910                                         printf("error %s non-fast forward\n", ref->name);
1911                                 rc = -2;
1912                                 continue;
1913                         }
1914                 }
1915                 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
1916                 new_refs++;
1917                 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
1918                 new_hex = sha1_to_hex(ref->new_sha1);
1919
1920                 fprintf(stderr, "updating '%s'", ref->name);
1921                 if (strcmp(ref->name, ref->peer_ref->name))
1922                         fprintf(stderr, " using '%s'", ref->peer_ref->name);
1923                 fprintf(stderr, "\n  from %s\n  to   %s\n", old_hex, new_hex);
1924                 if (dry_run) {
1925                         if (helper_status)
1926                                 printf("ok %s\n", ref->name);
1927                         continue;
1928                 }
1929
1930                 /* Lock remote branch ref */
1931                 ref_lock = lock_remote(ref->name, LOCK_TIME);
1932                 if (ref_lock == NULL) {
1933                         fprintf(stderr, "Unable to lock remote branch %s\n",
1934                                 ref->name);
1935                         if (helper_status)
1936                                 printf("error %s lock error\n", ref->name);
1937                         rc = 1;
1938                         continue;
1939                 }
1940
1941                 /* Set up revision info for this refspec */
1942                 commit_argc = 3;
1943                 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
1944                 old_sha1_hex = NULL;
1945                 commit_argv[1] = "--objects";
1946                 commit_argv[2] = new_sha1_hex;
1947                 if (!push_all && !is_null_sha1(ref->old_sha1)) {
1948                         old_sha1_hex = xmalloc(42);
1949                         sprintf(old_sha1_hex, "^%s",
1950                                 sha1_to_hex(ref->old_sha1));
1951                         commit_argv[3] = old_sha1_hex;
1952                         commit_argc++;
1953                 }
1954                 commit_argv[commit_argc] = NULL;
1955                 init_revisions(&revs, setup_git_directory());
1956                 setup_revisions(commit_argc, commit_argv, &revs, NULL);
1957                 revs.edge_hint = 0; /* just in case */
1958                 free(new_sha1_hex);
1959                 if (old_sha1_hex) {
1960                         free(old_sha1_hex);
1961                         commit_argv[1] = NULL;
1962                 }
1963
1964                 /* Generate a list of objects that need to be pushed */
1965                 pushing = 0;
1966                 if (prepare_revision_walk(&revs))
1967                         die("revision walk setup failed");
1968                 mark_edges_uninteresting(&revs, NULL);
1969                 objects_to_send = get_delta(&revs, ref_lock);
1970                 finish_all_active_slots();
1971
1972                 /* Push missing objects to remote, this would be a
1973                    convenient time to pack them first if appropriate. */
1974                 pushing = 1;
1975                 if (objects_to_send)
1976                         fprintf(stderr, "    sending %d objects\n",
1977                                 objects_to_send);
1978
1979                 run_request_queue();
1980
1981                 /* Update the remote branch if all went well */
1982                 if (aborted || !update_remote(ref->new_sha1, ref_lock))
1983                         rc = 1;
1984
1985                 if (!rc)
1986                         fprintf(stderr, "    done\n");
1987                 if (helper_status)
1988                         printf("%s %s\n", !rc ? "ok" : "error", ref->name);
1989                 unlock_remote(ref_lock);
1990                 check_locks();
1991         }
1992
1993         /* Update remote server info if appropriate */
1994         if (repo->has_info_refs && new_refs) {
1995                 if (info_ref_lock && repo->can_update_info_refs) {
1996                         fprintf(stderr, "Updating remote server info\n");
1997                         if (!dry_run)
1998                                 update_remote_info_refs(info_ref_lock);
1999                 } else {
2000                         fprintf(stderr, "Unable to update server info\n");
2001                 }
2002         }
2003
2004  cleanup:
2005         if (info_ref_lock)
2006                 unlock_remote(info_ref_lock);
2007         free(repo);
2008
2009         http_cleanup();
2010
2011         request = request_queue_head;
2012         while (request != NULL) {
2013                 next_request = request->next;
2014                 release_request(request);
2015                 request = next_request;
2016         }
2017
2018         return rc;
2019 }