ident: make user_ident_explicitly_given static
[git] / remote-curl.c
1 #include "cache.h"
2 #include "remote.h"
3 #include "strbuf.h"
4 #include "walker.h"
5 #include "http.h"
6 #include "exec_cmd.h"
7 #include "run-command.h"
8 #include "pkt-line.h"
9 #include "sideband.h"
10
11 static struct remote *remote;
12 static const char *url; /* always ends with a trailing slash */
13
14 struct options {
15         int verbosity;
16         unsigned long depth;
17         unsigned progress : 1,
18                 followtags : 1,
19                 dry_run : 1,
20                 thin : 1;
21 };
22 static struct options options;
23
24 static int set_option(const char *name, const char *value)
25 {
26         if (!strcmp(name, "verbosity")) {
27                 char *end;
28                 int v = strtol(value, &end, 10);
29                 if (value == end || *end)
30                         return -1;
31                 options.verbosity = v;
32                 return 0;
33         }
34         else if (!strcmp(name, "progress")) {
35                 if (!strcmp(value, "true"))
36                         options.progress = 1;
37                 else if (!strcmp(value, "false"))
38                         options.progress = 0;
39                 else
40                         return -1;
41                 return 0;
42         }
43         else if (!strcmp(name, "depth")) {
44                 char *end;
45                 unsigned long v = strtoul(value, &end, 10);
46                 if (value == end || *end)
47                         return -1;
48                 options.depth = v;
49                 return 0;
50         }
51         else if (!strcmp(name, "followtags")) {
52                 if (!strcmp(value, "true"))
53                         options.followtags = 1;
54                 else if (!strcmp(value, "false"))
55                         options.followtags = 0;
56                 else
57                         return -1;
58                 return 0;
59         }
60         else if (!strcmp(name, "dry-run")) {
61                 if (!strcmp(value, "true"))
62                         options.dry_run = 1;
63                 else if (!strcmp(value, "false"))
64                         options.dry_run = 0;
65                 else
66                         return -1;
67                 return 0;
68         }
69         else {
70                 return 1 /* unsupported */;
71         }
72 }
73
74 struct discovery {
75         const char *service;
76         char *buf_alloc;
77         char *buf;
78         size_t len;
79         unsigned proto_git : 1;
80 };
81 static struct discovery *last_discovery;
82
83 static void free_discovery(struct discovery *d)
84 {
85         if (d) {
86                 if (d == last_discovery)
87                         last_discovery = NULL;
88                 free(d->buf_alloc);
89                 free(d);
90         }
91 }
92
93 static struct discovery* discover_refs(const char *service)
94 {
95         struct strbuf buffer = STRBUF_INIT;
96         struct discovery *last = last_discovery;
97         char *refs_url;
98         int http_ret, maybe_smart = 0;
99
100         if (last && !strcmp(service, last->service))
101                 return last;
102         free_discovery(last);
103
104         strbuf_addf(&buffer, "%sinfo/refs", url);
105         if ((!prefixcmp(url, "http://") || !prefixcmp(url, "https://")) &&
106              git_env_bool("GIT_SMART_HTTP", 1)) {
107                 maybe_smart = 1;
108                 if (!strchr(url, '?'))
109                         strbuf_addch(&buffer, '?');
110                 else
111                         strbuf_addch(&buffer, '&');
112                 strbuf_addf(&buffer, "service=%s", service);
113         }
114         refs_url = strbuf_detach(&buffer, NULL);
115
116         http_ret = http_get_strbuf(refs_url, &buffer, HTTP_NO_CACHE);
117         switch (http_ret) {
118         case HTTP_OK:
119                 break;
120         case HTTP_MISSING_TARGET:
121                 die("%s not found: did you run git update-server-info on the"
122                     " server?", refs_url);
123         case HTTP_NOAUTH:
124                 die("Authentication failed");
125         default:
126                 http_error(refs_url, http_ret);
127                 die("HTTP request failed");
128         }
129
130         last= xcalloc(1, sizeof(*last_discovery));
131         last->service = service;
132         last->buf_alloc = strbuf_detach(&buffer, &last->len);
133         last->buf = last->buf_alloc;
134
135         if (maybe_smart && 5 <= last->len && last->buf[4] == '#') {
136                 /* smart HTTP response; validate that the service
137                  * pkt-line matches our request.
138                  */
139                 struct strbuf exp = STRBUF_INIT;
140
141                 if (packet_get_line(&buffer, &last->buf, &last->len) <= 0)
142                         die("%s has invalid packet header", refs_url);
143                 if (buffer.len && buffer.buf[buffer.len - 1] == '\n')
144                         strbuf_setlen(&buffer, buffer.len - 1);
145
146                 strbuf_addf(&exp, "# service=%s", service);
147                 if (strbuf_cmp(&exp, &buffer))
148                         die("invalid server response; got '%s'", buffer.buf);
149                 strbuf_release(&exp);
150
151                 /* The header can include additional metadata lines, up
152                  * until a packet flush marker.  Ignore these now, but
153                  * in the future we might start to scan them.
154                  */
155                 strbuf_reset(&buffer);
156                 while (packet_get_line(&buffer, &last->buf, &last->len) > 0)
157                         strbuf_reset(&buffer);
158
159                 last->proto_git = 1;
160         }
161
162         free(refs_url);
163         strbuf_release(&buffer);
164         last_discovery = last;
165         return last;
166 }
167
168 static int write_discovery(int in, int out, void *data)
169 {
170         struct discovery *heads = data;
171         int err = 0;
172         if (write_in_full(out, heads->buf, heads->len) != heads->len)
173                 err = 1;
174         close(out);
175         return err;
176 }
177
178 static struct ref *parse_git_refs(struct discovery *heads, int for_push)
179 {
180         struct ref *list = NULL;
181         struct async async;
182
183         memset(&async, 0, sizeof(async));
184         async.proc = write_discovery;
185         async.data = heads;
186         async.out = -1;
187
188         if (start_async(&async))
189                 die("cannot start thread to parse advertised refs");
190         get_remote_heads(async.out, &list,
191                         for_push ? REF_NORMAL : 0, NULL);
192         close(async.out);
193         if (finish_async(&async))
194                 die("ref parsing thread failed");
195         return list;
196 }
197
198 static struct ref *parse_info_refs(struct discovery *heads)
199 {
200         char *data, *start, *mid;
201         char *ref_name;
202         int i = 0;
203
204         struct ref *refs = NULL;
205         struct ref *ref = NULL;
206         struct ref *last_ref = NULL;
207
208         data = heads->buf;
209         start = NULL;
210         mid = data;
211         while (i < heads->len) {
212                 if (!start) {
213                         start = &data[i];
214                 }
215                 if (data[i] == '\t')
216                         mid = &data[i];
217                 if (data[i] == '\n') {
218                         if (mid - start != 40)
219                                 die("%sinfo/refs not valid: is this a git repository?", url);
220                         data[i] = 0;
221                         ref_name = mid + 1;
222                         ref = xmalloc(sizeof(struct ref) +
223                                       strlen(ref_name) + 1);
224                         memset(ref, 0, sizeof(struct ref));
225                         strcpy(ref->name, ref_name);
226                         get_sha1_hex(start, ref->old_sha1);
227                         if (!refs)
228                                 refs = ref;
229                         if (last_ref)
230                                 last_ref->next = ref;
231                         last_ref = ref;
232                         start = NULL;
233                 }
234                 i++;
235         }
236
237         ref = alloc_ref("HEAD");
238         if (!http_fetch_ref(url, ref) &&
239             !resolve_remote_symref(ref, refs)) {
240                 ref->next = refs;
241                 refs = ref;
242         } else {
243                 free(ref);
244         }
245
246         return refs;
247 }
248
249 static struct ref *get_refs(int for_push)
250 {
251         struct discovery *heads;
252
253         if (for_push)
254                 heads = discover_refs("git-receive-pack");
255         else
256                 heads = discover_refs("git-upload-pack");
257
258         if (heads->proto_git)
259                 return parse_git_refs(heads, for_push);
260         return parse_info_refs(heads);
261 }
262
263 static void output_refs(struct ref *refs)
264 {
265         struct ref *posn;
266         for (posn = refs; posn; posn = posn->next) {
267                 if (posn->symref)
268                         printf("@%s %s\n", posn->symref, posn->name);
269                 else
270                         printf("%s %s\n", sha1_to_hex(posn->old_sha1), posn->name);
271         }
272         printf("\n");
273         fflush(stdout);
274         free_refs(refs);
275 }
276
277 struct rpc_state {
278         const char *service_name;
279         const char **argv;
280         struct strbuf *stdin_preamble;
281         char *service_url;
282         char *hdr_content_type;
283         char *hdr_accept;
284         char *buf;
285         size_t alloc;
286         size_t len;
287         size_t pos;
288         int in;
289         int out;
290         struct strbuf result;
291         unsigned gzip_request : 1;
292         unsigned initial_buffer : 1;
293 };
294
295 static size_t rpc_out(void *ptr, size_t eltsize,
296                 size_t nmemb, void *buffer_)
297 {
298         size_t max = eltsize * nmemb;
299         struct rpc_state *rpc = buffer_;
300         size_t avail = rpc->len - rpc->pos;
301
302         if (!avail) {
303                 rpc->initial_buffer = 0;
304                 avail = packet_read_line(rpc->out, rpc->buf, rpc->alloc);
305                 if (!avail)
306                         return 0;
307                 rpc->pos = 0;
308                 rpc->len = avail;
309         }
310
311         if (max < avail)
312                 avail = max;
313         memcpy(ptr, rpc->buf + rpc->pos, avail);
314         rpc->pos += avail;
315         return avail;
316 }
317
318 #ifndef NO_CURL_IOCTL
319 static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
320 {
321         struct rpc_state *rpc = clientp;
322
323         switch (cmd) {
324         case CURLIOCMD_NOP:
325                 return CURLIOE_OK;
326
327         case CURLIOCMD_RESTARTREAD:
328                 if (rpc->initial_buffer) {
329                         rpc->pos = 0;
330                         return CURLIOE_OK;
331                 }
332                 fprintf(stderr, "Unable to rewind rpc post data - try increasing http.postBuffer\n");
333                 return CURLIOE_FAILRESTART;
334
335         default:
336                 return CURLIOE_UNKNOWNCMD;
337         }
338 }
339 #endif
340
341 static size_t rpc_in(char *ptr, size_t eltsize,
342                 size_t nmemb, void *buffer_)
343 {
344         size_t size = eltsize * nmemb;
345         struct rpc_state *rpc = buffer_;
346         write_or_die(rpc->in, ptr, size);
347         return size;
348 }
349
350 static int run_slot(struct active_request_slot *slot)
351 {
352         int err;
353         struct slot_results results;
354
355         slot->results = &results;
356         slot->curl_result = curl_easy_perform(slot->curl);
357         finish_active_slot(slot);
358
359         err = handle_curl_result(&results);
360         if (err != HTTP_OK && err != HTTP_REAUTH) {
361                 error("RPC failed; result=%d, HTTP code = %ld",
362                       results.curl_result, results.http_code);
363         }
364
365         return err;
366 }
367
368 static int probe_rpc(struct rpc_state *rpc)
369 {
370         struct active_request_slot *slot;
371         struct curl_slist *headers = NULL;
372         struct strbuf buf = STRBUF_INIT;
373         int err;
374
375         slot = get_active_slot();
376
377         headers = curl_slist_append(headers, rpc->hdr_content_type);
378         headers = curl_slist_append(headers, rpc->hdr_accept);
379
380         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
381         curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
382         curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
383         curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
384         curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
385         curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
386         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
387         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
388         curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
389
390         err = run_slot(slot);
391
392         curl_slist_free_all(headers);
393         strbuf_release(&buf);
394         return err;
395 }
396
397 static int post_rpc(struct rpc_state *rpc)
398 {
399         struct active_request_slot *slot;
400         struct curl_slist *headers = NULL;
401         int use_gzip = rpc->gzip_request;
402         char *gzip_body = NULL;
403         int err, large_request = 0;
404
405         /* Try to load the entire request, if we can fit it into the
406          * allocated buffer space we can use HTTP/1.0 and avoid the
407          * chunked encoding mess.
408          */
409         while (1) {
410                 size_t left = rpc->alloc - rpc->len;
411                 char *buf = rpc->buf + rpc->len;
412                 int n;
413
414                 if (left < LARGE_PACKET_MAX) {
415                         large_request = 1;
416                         use_gzip = 0;
417                         break;
418                 }
419
420                 n = packet_read_line(rpc->out, buf, left);
421                 if (!n)
422                         break;
423                 rpc->len += n;
424         }
425
426         if (large_request) {
427                 do {
428                         err = probe_rpc(rpc);
429                 } while (err == HTTP_REAUTH);
430                 if (err != HTTP_OK)
431                         return -1;
432         }
433
434         headers = curl_slist_append(headers, rpc->hdr_content_type);
435         headers = curl_slist_append(headers, rpc->hdr_accept);
436         headers = curl_slist_append(headers, "Expect:");
437
438 retry:
439         slot = get_active_slot();
440
441         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
442         curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
443         curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
444         curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
445
446         if (large_request) {
447                 /* The request body is large and the size cannot be predicted.
448                  * We must use chunked encoding to send it.
449                  */
450                 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
451                 rpc->initial_buffer = 1;
452                 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
453                 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
454 #ifndef NO_CURL_IOCTL
455                 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
456                 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
457 #endif
458                 if (options.verbosity > 1) {
459                         fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
460                         fflush(stderr);
461                 }
462
463         } else if (use_gzip && 1024 < rpc->len) {
464                 /* The client backend isn't giving us compressed data so
465                  * we can try to deflate it ourselves, this may save on.
466                  * the transfer time.
467                  */
468                 size_t size;
469                 git_zstream stream;
470                 int ret;
471
472                 memset(&stream, 0, sizeof(stream));
473                 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
474                 size = git_deflate_bound(&stream, rpc->len);
475                 gzip_body = xmalloc(size);
476
477                 stream.next_in = (unsigned char *)rpc->buf;
478                 stream.avail_in = rpc->len;
479                 stream.next_out = (unsigned char *)gzip_body;
480                 stream.avail_out = size;
481
482                 ret = git_deflate(&stream, Z_FINISH);
483                 if (ret != Z_STREAM_END)
484                         die("cannot deflate request; zlib deflate error %d", ret);
485
486                 ret = git_deflate_end_gently(&stream);
487                 if (ret != Z_OK)
488                         die("cannot deflate request; zlib end error %d", ret);
489
490                 size = stream.total_out;
491
492                 headers = curl_slist_append(headers, "Content-Encoding: gzip");
493                 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
494                 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, size);
495
496                 if (options.verbosity > 1) {
497                         fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
498                                 rpc->service_name,
499                                 (unsigned long)rpc->len, (unsigned long)size);
500                         fflush(stderr);
501                 }
502         } else {
503                 /* We know the complete request size in advance, use the
504                  * more normal Content-Length approach.
505                  */
506                 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
507                 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, rpc->len);
508                 if (options.verbosity > 1) {
509                         fprintf(stderr, "POST %s (%lu bytes)\n",
510                                 rpc->service_name, (unsigned long)rpc->len);
511                         fflush(stderr);
512                 }
513         }
514
515         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
516         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
517         curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
518
519         err = run_slot(slot);
520         if (err == HTTP_REAUTH && !large_request && !use_gzip)
521                 goto retry;
522         if (err != HTTP_OK)
523                 err = -1;
524
525         curl_slist_free_all(headers);
526         free(gzip_body);
527         return err;
528 }
529
530 static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
531 {
532         const char *svc = rpc->service_name;
533         struct strbuf buf = STRBUF_INIT;
534         struct strbuf *preamble = rpc->stdin_preamble;
535         struct child_process client;
536         int err = 0;
537
538         memset(&client, 0, sizeof(client));
539         client.in = -1;
540         client.out = -1;
541         client.git_cmd = 1;
542         client.argv = rpc->argv;
543         if (start_command(&client))
544                 exit(1);
545         if (preamble)
546                 write_or_die(client.in, preamble->buf, preamble->len);
547         if (heads)
548                 write_or_die(client.in, heads->buf, heads->len);
549
550         rpc->alloc = http_post_buffer;
551         rpc->buf = xmalloc(rpc->alloc);
552         rpc->in = client.in;
553         rpc->out = client.out;
554         strbuf_init(&rpc->result, 0);
555
556         strbuf_addf(&buf, "%s%s", url, svc);
557         rpc->service_url = strbuf_detach(&buf, NULL);
558
559         strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
560         rpc->hdr_content_type = strbuf_detach(&buf, NULL);
561
562         strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
563         rpc->hdr_accept = strbuf_detach(&buf, NULL);
564
565         while (!err) {
566                 int n = packet_read_line(rpc->out, rpc->buf, rpc->alloc);
567                 if (!n)
568                         break;
569                 rpc->pos = 0;
570                 rpc->len = n;
571                 err |= post_rpc(rpc);
572         }
573
574         close(client.in);
575         client.in = -1;
576         if (!err) {
577                 strbuf_read(&rpc->result, client.out, 0);
578         } else {
579                 char buf[4096];
580                 for (;;)
581                         if (xread(client.out, buf, sizeof(buf)) <= 0)
582                                 break;
583         }
584
585         close(client.out);
586         client.out = -1;
587
588         err |= finish_command(&client);
589         free(rpc->service_url);
590         free(rpc->hdr_content_type);
591         free(rpc->hdr_accept);
592         free(rpc->buf);
593         strbuf_release(&buf);
594         return err;
595 }
596
597 static int fetch_dumb(int nr_heads, struct ref **to_fetch)
598 {
599         struct walker *walker;
600         char **targets = xmalloc(nr_heads * sizeof(char*));
601         int ret, i;
602
603         if (options.depth)
604                 die("dumb http transport does not support --depth");
605         for (i = 0; i < nr_heads; i++)
606                 targets[i] = xstrdup(sha1_to_hex(to_fetch[i]->old_sha1));
607
608         walker = get_http_walker(url);
609         walker->get_all = 1;
610         walker->get_tree = 1;
611         walker->get_history = 1;
612         walker->get_verbosely = options.verbosity >= 3;
613         walker->get_recover = 0;
614         ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
615         walker_free(walker);
616
617         for (i = 0; i < nr_heads; i++)
618                 free(targets[i]);
619         free(targets);
620
621         return ret ? error("Fetch failed.") : 0;
622 }
623
624 static int fetch_git(struct discovery *heads,
625         int nr_heads, struct ref **to_fetch)
626 {
627         struct rpc_state rpc;
628         struct strbuf preamble = STRBUF_INIT;
629         char *depth_arg = NULL;
630         int argc = 0, i, err;
631         const char *argv[15];
632
633         argv[argc++] = "fetch-pack";
634         argv[argc++] = "--stateless-rpc";
635         argv[argc++] = "--stdin";
636         argv[argc++] = "--lock-pack";
637         if (options.followtags)
638                 argv[argc++] = "--include-tag";
639         if (options.thin)
640                 argv[argc++] = "--thin";
641         if (options.verbosity >= 3) {
642                 argv[argc++] = "-v";
643                 argv[argc++] = "-v";
644         }
645         if (!options.progress)
646                 argv[argc++] = "--no-progress";
647         if (options.depth) {
648                 struct strbuf buf = STRBUF_INIT;
649                 strbuf_addf(&buf, "--depth=%lu", options.depth);
650                 depth_arg = strbuf_detach(&buf, NULL);
651                 argv[argc++] = depth_arg;
652         }
653         argv[argc++] = url;
654         argv[argc++] = NULL;
655
656         for (i = 0; i < nr_heads; i++) {
657                 struct ref *ref = to_fetch[i];
658                 if (!ref->name || !*ref->name)
659                         die("cannot fetch by sha1 over smart http");
660                 packet_buf_write(&preamble, "%s\n", ref->name);
661         }
662         packet_buf_flush(&preamble);
663
664         memset(&rpc, 0, sizeof(rpc));
665         rpc.service_name = "git-upload-pack",
666         rpc.argv = argv;
667         rpc.stdin_preamble = &preamble;
668         rpc.gzip_request = 1;
669
670         err = rpc_service(&rpc, heads);
671         if (rpc.result.len)
672                 safe_write(1, rpc.result.buf, rpc.result.len);
673         strbuf_release(&rpc.result);
674         strbuf_release(&preamble);
675         free(depth_arg);
676         return err;
677 }
678
679 static int fetch(int nr_heads, struct ref **to_fetch)
680 {
681         struct discovery *d = discover_refs("git-upload-pack");
682         if (d->proto_git)
683                 return fetch_git(d, nr_heads, to_fetch);
684         else
685                 return fetch_dumb(nr_heads, to_fetch);
686 }
687
688 static void parse_fetch(struct strbuf *buf)
689 {
690         struct ref **to_fetch = NULL;
691         struct ref *list_head = NULL;
692         struct ref **list = &list_head;
693         int alloc_heads = 0, nr_heads = 0;
694
695         do {
696                 if (!prefixcmp(buf->buf, "fetch ")) {
697                         char *p = buf->buf + strlen("fetch ");
698                         char *name;
699                         struct ref *ref;
700                         unsigned char old_sha1[20];
701
702                         if (strlen(p) < 40 || get_sha1_hex(p, old_sha1))
703                                 die("protocol error: expected sha/ref, got %s'", p);
704                         if (p[40] == ' ')
705                                 name = p + 41;
706                         else if (!p[40])
707                                 name = "";
708                         else
709                                 die("protocol error: expected sha/ref, got %s'", p);
710
711                         ref = alloc_ref(name);
712                         hashcpy(ref->old_sha1, old_sha1);
713
714                         *list = ref;
715                         list = &ref->next;
716
717                         ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
718                         to_fetch[nr_heads++] = ref;
719                 }
720                 else
721                         die("http transport does not support %s", buf->buf);
722
723                 strbuf_reset(buf);
724                 if (strbuf_getline(buf, stdin, '\n') == EOF)
725                         return;
726                 if (!*buf->buf)
727                         break;
728         } while (1);
729
730         if (fetch(nr_heads, to_fetch))
731                 exit(128); /* error already reported */
732         free_refs(list_head);
733         free(to_fetch);
734
735         printf("\n");
736         fflush(stdout);
737         strbuf_reset(buf);
738 }
739
740 static int push_dav(int nr_spec, char **specs)
741 {
742         const char **argv = xmalloc((10 + nr_spec) * sizeof(char*));
743         int argc = 0, i;
744
745         argv[argc++] = "http-push";
746         argv[argc++] = "--helper-status";
747         if (options.dry_run)
748                 argv[argc++] = "--dry-run";
749         if (options.verbosity > 1)
750                 argv[argc++] = "--verbose";
751         argv[argc++] = url;
752         for (i = 0; i < nr_spec; i++)
753                 argv[argc++] = specs[i];
754         argv[argc++] = NULL;
755
756         if (run_command_v_opt(argv, RUN_GIT_CMD))
757                 die("git-%s failed", argv[0]);
758         free(argv);
759         return 0;
760 }
761
762 static int push_git(struct discovery *heads, int nr_spec, char **specs)
763 {
764         struct rpc_state rpc;
765         const char **argv;
766         int argc = 0, i, err;
767
768         argv = xmalloc((10 + nr_spec) * sizeof(char*));
769         argv[argc++] = "send-pack";
770         argv[argc++] = "--stateless-rpc";
771         argv[argc++] = "--helper-status";
772         if (options.thin)
773                 argv[argc++] = "--thin";
774         if (options.dry_run)
775                 argv[argc++] = "--dry-run";
776         if (options.verbosity == 0)
777                 argv[argc++] = "--quiet";
778         else if (options.verbosity > 1)
779                 argv[argc++] = "--verbose";
780         argv[argc++] = options.progress ? "--progress" : "--no-progress";
781         argv[argc++] = url;
782         for (i = 0; i < nr_spec; i++)
783                 argv[argc++] = specs[i];
784         argv[argc++] = NULL;
785
786         memset(&rpc, 0, sizeof(rpc));
787         rpc.service_name = "git-receive-pack",
788         rpc.argv = argv;
789
790         err = rpc_service(&rpc, heads);
791         if (rpc.result.len)
792                 safe_write(1, rpc.result.buf, rpc.result.len);
793         strbuf_release(&rpc.result);
794         free(argv);
795         return err;
796 }
797
798 static int push(int nr_spec, char **specs)
799 {
800         struct discovery *heads = discover_refs("git-receive-pack");
801         int ret;
802
803         if (heads->proto_git)
804                 ret = push_git(heads, nr_spec, specs);
805         else
806                 ret = push_dav(nr_spec, specs);
807         free_discovery(heads);
808         return ret;
809 }
810
811 static void parse_push(struct strbuf *buf)
812 {
813         char **specs = NULL;
814         int alloc_spec = 0, nr_spec = 0, i, ret;
815
816         do {
817                 if (!prefixcmp(buf->buf, "push ")) {
818                         ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
819                         specs[nr_spec++] = xstrdup(buf->buf + 5);
820                 }
821                 else
822                         die("http transport does not support %s", buf->buf);
823
824                 strbuf_reset(buf);
825                 if (strbuf_getline(buf, stdin, '\n') == EOF)
826                         goto free_specs;
827                 if (!*buf->buf)
828                         break;
829         } while (1);
830
831         ret = push(nr_spec, specs);
832         printf("\n");
833         fflush(stdout);
834
835         if (ret)
836                 exit(128); /* error already reported */
837
838  free_specs:
839         for (i = 0; i < nr_spec; i++)
840                 free(specs[i]);
841         free(specs);
842 }
843
844 int main(int argc, const char **argv)
845 {
846         struct strbuf buf = STRBUF_INIT;
847         int nongit;
848
849         git_extract_argv0_path(argv[0]);
850         setup_git_directory_gently(&nongit);
851         if (argc < 2) {
852                 fprintf(stderr, "Remote needed\n");
853                 return 1;
854         }
855
856         options.verbosity = 1;
857         options.progress = !!isatty(2);
858         options.thin = 1;
859
860         remote = remote_get(argv[1]);
861
862         if (argc > 2) {
863                 end_url_with_slash(&buf, argv[2]);
864         } else {
865                 end_url_with_slash(&buf, remote->url[0]);
866         }
867
868         url = strbuf_detach(&buf, NULL);
869
870         http_init(remote, url, 0);
871
872         do {
873                 if (strbuf_getline(&buf, stdin, '\n') == EOF) {
874                         if (ferror(stdin))
875                                 fprintf(stderr, "Error reading command stream\n");
876                         else
877                                 fprintf(stderr, "Unexpected end of command stream\n");
878                         return 1;
879                 }
880                 if (buf.len == 0)
881                         break;
882                 if (!prefixcmp(buf.buf, "fetch ")) {
883                         if (nongit)
884                                 die("Fetch attempted without a local repo");
885                         parse_fetch(&buf);
886
887                 } else if (!strcmp(buf.buf, "list") || !prefixcmp(buf.buf, "list ")) {
888                         int for_push = !!strstr(buf.buf + 4, "for-push");
889                         output_refs(get_refs(for_push));
890
891                 } else if (!prefixcmp(buf.buf, "push ")) {
892                         parse_push(&buf);
893
894                 } else if (!prefixcmp(buf.buf, "option ")) {
895                         char *name = buf.buf + strlen("option ");
896                         char *value = strchr(name, ' ');
897                         int result;
898
899                         if (value)
900                                 *value++ = '\0';
901                         else
902                                 value = "true";
903
904                         result = set_option(name, value);
905                         if (!result)
906                                 printf("ok\n");
907                         else if (result < 0)
908                                 printf("error invalid value\n");
909                         else
910                                 printf("unsupported\n");
911                         fflush(stdout);
912
913                 } else if (!strcmp(buf.buf, "capabilities")) {
914                         printf("fetch\n");
915                         printf("option\n");
916                         printf("push\n");
917                         printf("\n");
918                         fflush(stdout);
919                 } else {
920                         fprintf(stderr, "Unknown command '%s'\n", buf.buf);
921                         return 1;
922                 }
923                 strbuf_reset(&buf);
924         } while (1);
925
926         http_cleanup();
927
928         return 0;
929 }