http-push.c

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