http: do not set up curl auth after a 401
[git/git.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, is_http = 0, proto_git_candidate = 1;
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 is_http = 1;
107 if (!strchr(url, '?'))
108 strbuf_addch(&buffer, '?');
109 else
110 strbuf_addch(&buffer, '&');
111 strbuf_addf(&buffer, "service=%s", service);
112 }
113 refs_url = strbuf_detach(&buffer, NULL);
114
115 http_ret = http_get_strbuf(refs_url, &buffer, HTTP_NO_CACHE);
116
117 /* try again with "plain" url (no ? or & appended) */
118 if (http_ret != HTTP_OK && http_ret != HTTP_NOAUTH) {
119 free(refs_url);
120 strbuf_reset(&buffer);
121
122 proto_git_candidate = 0;
123 strbuf_addf(&buffer, "%sinfo/refs", url);
124 refs_url = strbuf_detach(&buffer, NULL);
125
126 http_ret = http_get_strbuf(refs_url, &buffer, HTTP_NO_CACHE);
127 }
128
129 switch (http_ret) {
130 case HTTP_OK:
131 break;
132 case HTTP_MISSING_TARGET:
133 die("%s not found: did you run git update-server-info on the"
134 " server?", refs_url);
135 case HTTP_NOAUTH:
136 die("Authentication failed");
137 default:
138 http_error(refs_url, http_ret);
139 die("HTTP request failed");
140 }
141
142 last= xcalloc(1, sizeof(*last_discovery));
143 last->service = service;
144 last->buf_alloc = strbuf_detach(&buffer, &last->len);
145 last->buf = last->buf_alloc;
146
147 if (is_http && proto_git_candidate
148 && 5 <= last->len && last->buf[4] == '#') {
149 /* smart HTTP response; validate that the service
150 * pkt-line matches our request.
151 */
152 struct strbuf exp = STRBUF_INIT;
153
154 if (packet_get_line(&buffer, &last->buf, &last->len) <= 0)
155 die("%s has invalid packet header", refs_url);
156 if (buffer.len && buffer.buf[buffer.len - 1] == '\n')
157 strbuf_setlen(&buffer, buffer.len - 1);
158
159 strbuf_addf(&exp, "# service=%s", service);
160 if (strbuf_cmp(&exp, &buffer))
161 die("invalid server response; got '%s'", buffer.buf);
162 strbuf_release(&exp);
163
164 /* The header can include additional metadata lines, up
165 * until a packet flush marker. Ignore these now, but
166 * in the future we might start to scan them.
167 */
168 strbuf_reset(&buffer);
169 while (packet_get_line(&buffer, &last->buf, &last->len) > 0)
170 strbuf_reset(&buffer);
171
172 last->proto_git = 1;
173 }
174
175 free(refs_url);
176 strbuf_release(&buffer);
177 last_discovery = last;
178 return last;
179 }
180
181 static int write_discovery(int in, int out, void *data)
182 {
183 struct discovery *heads = data;
184 int err = 0;
185 if (write_in_full(out, heads->buf, heads->len) != heads->len)
186 err = 1;
187 close(out);
188 return err;
189 }
190
191 static struct ref *parse_git_refs(struct discovery *heads, int for_push)
192 {
193 struct ref *list = NULL;
194 struct async async;
195
196 memset(&async, 0, sizeof(async));
197 async.proc = write_discovery;
198 async.data = heads;
199 async.out = -1;
200
201 if (start_async(&async))
202 die("cannot start thread to parse advertised refs");
203 get_remote_heads(async.out, &list,
204 for_push ? REF_NORMAL : 0, NULL);
205 close(async.out);
206 if (finish_async(&async))
207 die("ref parsing thread failed");
208 return list;
209 }
210
211 static struct ref *parse_info_refs(struct discovery *heads)
212 {
213 char *data, *start, *mid;
214 char *ref_name;
215 int i = 0;
216
217 struct ref *refs = NULL;
218 struct ref *ref = NULL;
219 struct ref *last_ref = NULL;
220
221 data = heads->buf;
222 start = NULL;
223 mid = data;
224 while (i < heads->len) {
225 if (!start) {
226 start = &data[i];
227 }
228 if (data[i] == '\t')
229 mid = &data[i];
230 if (data[i] == '\n') {
231 if (mid - start != 40)
232 die("%sinfo/refs not valid: is this a git repository?", url);
233 data[i] = 0;
234 ref_name = mid + 1;
235 ref = xmalloc(sizeof(struct ref) +
236 strlen(ref_name) + 1);
237 memset(ref, 0, sizeof(struct ref));
238 strcpy(ref->name, ref_name);
239 get_sha1_hex(start, ref->old_sha1);
240 if (!refs)
241 refs = ref;
242 if (last_ref)
243 last_ref->next = ref;
244 last_ref = ref;
245 start = NULL;
246 }
247 i++;
248 }
249
250 ref = alloc_ref("HEAD");
251 if (!http_fetch_ref(url, ref) &&
252 !resolve_remote_symref(ref, refs)) {
253 ref->next = refs;
254 refs = ref;
255 } else {
256 free(ref);
257 }
258
259 return refs;
260 }
261
262 static struct ref *get_refs(int for_push)
263 {
264 struct discovery *heads;
265
266 if (for_push)
267 heads = discover_refs("git-receive-pack");
268 else
269 heads = discover_refs("git-upload-pack");
270
271 if (heads->proto_git)
272 return parse_git_refs(heads, for_push);
273 return parse_info_refs(heads);
274 }
275
276 static void output_refs(struct ref *refs)
277 {
278 struct ref *posn;
279 for (posn = refs; posn; posn = posn->next) {
280 if (posn->symref)
281 printf("@%s %s\n", posn->symref, posn->name);
282 else
283 printf("%s %s\n", sha1_to_hex(posn->old_sha1), posn->name);
284 }
285 printf("\n");
286 fflush(stdout);
287 free_refs(refs);
288 }
289
290 struct rpc_state {
291 const char *service_name;
292 const char **argv;
293 struct strbuf *stdin_preamble;
294 char *service_url;
295 char *hdr_content_type;
296 char *hdr_accept;
297 char *buf;
298 size_t alloc;
299 size_t len;
300 size_t pos;
301 int in;
302 int out;
303 struct strbuf result;
304 unsigned gzip_request : 1;
305 unsigned initial_buffer : 1;
306 };
307
308 static size_t rpc_out(void *ptr, size_t eltsize,
309 size_t nmemb, void *buffer_)
310 {
311 size_t max = eltsize * nmemb;
312 struct rpc_state *rpc = buffer_;
313 size_t avail = rpc->len - rpc->pos;
314
315 if (!avail) {
316 rpc->initial_buffer = 0;
317 avail = packet_read_line(rpc->out, rpc->buf, rpc->alloc);
318 if (!avail)
319 return 0;
320 rpc->pos = 0;
321 rpc->len = avail;
322 }
323
324 if (max < avail)
325 avail = max;
326 memcpy(ptr, rpc->buf + rpc->pos, avail);
327 rpc->pos += avail;
328 return avail;
329 }
330
331 #ifndef NO_CURL_IOCTL
332 static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
333 {
334 struct rpc_state *rpc = clientp;
335
336 switch (cmd) {
337 case CURLIOCMD_NOP:
338 return CURLIOE_OK;
339
340 case CURLIOCMD_RESTARTREAD:
341 if (rpc->initial_buffer) {
342 rpc->pos = 0;
343 return CURLIOE_OK;
344 }
345 fprintf(stderr, "Unable to rewind rpc post data - try increasing http.postBuffer\n");
346 return CURLIOE_FAILRESTART;
347
348 default:
349 return CURLIOE_UNKNOWNCMD;
350 }
351 }
352 #endif
353
354 static size_t rpc_in(char *ptr, size_t eltsize,
355 size_t nmemb, void *buffer_)
356 {
357 size_t size = eltsize * nmemb;
358 struct rpc_state *rpc = buffer_;
359 write_or_die(rpc->in, ptr, size);
360 return size;
361 }
362
363 static int run_slot(struct active_request_slot *slot)
364 {
365 int err;
366 struct slot_results results;
367
368 slot->results = &results;
369 slot->curl_result = curl_easy_perform(slot->curl);
370 finish_active_slot(slot);
371
372 err = handle_curl_result(&results);
373 if (err != HTTP_OK && err != HTTP_REAUTH) {
374 error("RPC failed; result=%d, HTTP code = %ld",
375 results.curl_result, results.http_code);
376 }
377
378 return err;
379 }
380
381 static int probe_rpc(struct rpc_state *rpc)
382 {
383 struct active_request_slot *slot;
384 struct curl_slist *headers = NULL;
385 struct strbuf buf = STRBUF_INIT;
386 int err;
387
388 slot = get_active_slot();
389
390 headers = curl_slist_append(headers, rpc->hdr_content_type);
391 headers = curl_slist_append(headers, rpc->hdr_accept);
392
393 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
394 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
395 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
396 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
397 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
398 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
399 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
400 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
401 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
402
403 err = run_slot(slot);
404
405 curl_slist_free_all(headers);
406 strbuf_release(&buf);
407 return err;
408 }
409
410 static int post_rpc(struct rpc_state *rpc)
411 {
412 struct active_request_slot *slot;
413 struct curl_slist *headers = NULL;
414 int use_gzip = rpc->gzip_request;
415 char *gzip_body = NULL;
416 int err, large_request = 0;
417
418 /* Try to load the entire request, if we can fit it into the
419 * allocated buffer space we can use HTTP/1.0 and avoid the
420 * chunked encoding mess.
421 */
422 while (1) {
423 size_t left = rpc->alloc - rpc->len;
424 char *buf = rpc->buf + rpc->len;
425 int n;
426
427 if (left < LARGE_PACKET_MAX) {
428 large_request = 1;
429 use_gzip = 0;
430 break;
431 }
432
433 n = packet_read_line(rpc->out, buf, left);
434 if (!n)
435 break;
436 rpc->len += n;
437 }
438
439 if (large_request) {
440 do {
441 err = probe_rpc(rpc);
442 } while (err == HTTP_REAUTH);
443 if (err != HTTP_OK)
444 return -1;
445 }
446
447 headers = curl_slist_append(headers, rpc->hdr_content_type);
448 headers = curl_slist_append(headers, rpc->hdr_accept);
449 headers = curl_slist_append(headers, "Expect:");
450
451 retry:
452 slot = get_active_slot();
453
454 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
455 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
456 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
457 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
458
459 if (large_request) {
460 /* The request body is large and the size cannot be predicted.
461 * We must use chunked encoding to send it.
462 */
463 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
464 rpc->initial_buffer = 1;
465 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
466 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
467 #ifndef NO_CURL_IOCTL
468 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
469 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
470 #endif
471 if (options.verbosity > 1) {
472 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
473 fflush(stderr);
474 }
475
476 } else if (use_gzip && 1024 < rpc->len) {
477 /* The client backend isn't giving us compressed data so
478 * we can try to deflate it ourselves, this may save on.
479 * the transfer time.
480 */
481 size_t size;
482 git_zstream stream;
483 int ret;
484
485 memset(&stream, 0, sizeof(stream));
486 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
487 size = git_deflate_bound(&stream, rpc->len);
488 gzip_body = xmalloc(size);
489
490 stream.next_in = (unsigned char *)rpc->buf;
491 stream.avail_in = rpc->len;
492 stream.next_out = (unsigned char *)gzip_body;
493 stream.avail_out = size;
494
495 ret = git_deflate(&stream, Z_FINISH);
496 if (ret != Z_STREAM_END)
497 die("cannot deflate request; zlib deflate error %d", ret);
498
499 ret = git_deflate_end_gently(&stream);
500 if (ret != Z_OK)
501 die("cannot deflate request; zlib end error %d", ret);
502
503 size = stream.total_out;
504
505 headers = curl_slist_append(headers, "Content-Encoding: gzip");
506 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
507 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, size);
508
509 if (options.verbosity > 1) {
510 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
511 rpc->service_name,
512 (unsigned long)rpc->len, (unsigned long)size);
513 fflush(stderr);
514 }
515 } else {
516 /* We know the complete request size in advance, use the
517 * more normal Content-Length approach.
518 */
519 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
520 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, rpc->len);
521 if (options.verbosity > 1) {
522 fprintf(stderr, "POST %s (%lu bytes)\n",
523 rpc->service_name, (unsigned long)rpc->len);
524 fflush(stderr);
525 }
526 }
527
528 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
529 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
530 curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
531
532 err = run_slot(slot);
533 if (err == HTTP_REAUTH && !large_request && !use_gzip)
534 goto retry;
535 if (err != HTTP_OK)
536 err = -1;
537
538 curl_slist_free_all(headers);
539 free(gzip_body);
540 return err;
541 }
542
543 static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
544 {
545 const char *svc = rpc->service_name;
546 struct strbuf buf = STRBUF_INIT;
547 struct strbuf *preamble = rpc->stdin_preamble;
548 struct child_process client;
549 int err = 0;
550
551 memset(&client, 0, sizeof(client));
552 client.in = -1;
553 client.out = -1;
554 client.git_cmd = 1;
555 client.argv = rpc->argv;
556 if (start_command(&client))
557 exit(1);
558 if (preamble)
559 write_or_die(client.in, preamble->buf, preamble->len);
560 if (heads)
561 write_or_die(client.in, heads->buf, heads->len);
562
563 rpc->alloc = http_post_buffer;
564 rpc->buf = xmalloc(rpc->alloc);
565 rpc->in = client.in;
566 rpc->out = client.out;
567 strbuf_init(&rpc->result, 0);
568
569 strbuf_addf(&buf, "%s%s", url, svc);
570 rpc->service_url = strbuf_detach(&buf, NULL);
571
572 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
573 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
574
575 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
576 rpc->hdr_accept = strbuf_detach(&buf, NULL);
577
578 while (!err) {
579 int n = packet_read_line(rpc->out, rpc->buf, rpc->alloc);
580 if (!n)
581 break;
582 rpc->pos = 0;
583 rpc->len = n;
584 err |= post_rpc(rpc);
585 }
586
587 close(client.in);
588 client.in = -1;
589 if (!err) {
590 strbuf_read(&rpc->result, client.out, 0);
591 } else {
592 char buf[4096];
593 for (;;)
594 if (xread(client.out, buf, sizeof(buf)) <= 0)
595 break;
596 }
597
598 close(client.out);
599 client.out = -1;
600
601 err |= finish_command(&client);
602 free(rpc->service_url);
603 free(rpc->hdr_content_type);
604 free(rpc->hdr_accept);
605 free(rpc->buf);
606 strbuf_release(&buf);
607 return err;
608 }
609
610 static int fetch_dumb(int nr_heads, struct ref **to_fetch)
611 {
612 struct walker *walker;
613 char **targets = xmalloc(nr_heads * sizeof(char*));
614 int ret, i;
615
616 if (options.depth)
617 die("dumb http transport does not support --depth");
618 for (i = 0; i < nr_heads; i++)
619 targets[i] = xstrdup(sha1_to_hex(to_fetch[i]->old_sha1));
620
621 walker = get_http_walker(url);
622 walker->get_all = 1;
623 walker->get_tree = 1;
624 walker->get_history = 1;
625 walker->get_verbosely = options.verbosity >= 3;
626 walker->get_recover = 0;
627 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
628 walker_free(walker);
629
630 for (i = 0; i < nr_heads; i++)
631 free(targets[i]);
632 free(targets);
633
634 return ret ? error("Fetch failed.") : 0;
635 }
636
637 static int fetch_git(struct discovery *heads,
638 int nr_heads, struct ref **to_fetch)
639 {
640 struct rpc_state rpc;
641 struct strbuf preamble = STRBUF_INIT;
642 char *depth_arg = NULL;
643 int argc = 0, i, err;
644 const char *argv[15];
645
646 argv[argc++] = "fetch-pack";
647 argv[argc++] = "--stateless-rpc";
648 argv[argc++] = "--stdin";
649 argv[argc++] = "--lock-pack";
650 if (options.followtags)
651 argv[argc++] = "--include-tag";
652 if (options.thin)
653 argv[argc++] = "--thin";
654 if (options.verbosity >= 3) {
655 argv[argc++] = "-v";
656 argv[argc++] = "-v";
657 }
658 if (!options.progress)
659 argv[argc++] = "--no-progress";
660 if (options.depth) {
661 struct strbuf buf = STRBUF_INIT;
662 strbuf_addf(&buf, "--depth=%lu", options.depth);
663 depth_arg = strbuf_detach(&buf, NULL);
664 argv[argc++] = depth_arg;
665 }
666 argv[argc++] = url;
667 argv[argc++] = NULL;
668
669 for (i = 0; i < nr_heads; i++) {
670 struct ref *ref = to_fetch[i];
671 if (!ref->name || !*ref->name)
672 die("cannot fetch by sha1 over smart http");
673 packet_buf_write(&preamble, "%s\n", ref->name);
674 }
675 packet_buf_flush(&preamble);
676
677 memset(&rpc, 0, sizeof(rpc));
678 rpc.service_name = "git-upload-pack",
679 rpc.argv = argv;
680 rpc.stdin_preamble = &preamble;
681 rpc.gzip_request = 1;
682
683 err = rpc_service(&rpc, heads);
684 if (rpc.result.len)
685 safe_write(1, rpc.result.buf, rpc.result.len);
686 strbuf_release(&rpc.result);
687 strbuf_release(&preamble);
688 free(depth_arg);
689 return err;
690 }
691
692 static int fetch(int nr_heads, struct ref **to_fetch)
693 {
694 struct discovery *d = discover_refs("git-upload-pack");
695 if (d->proto_git)
696 return fetch_git(d, nr_heads, to_fetch);
697 else
698 return fetch_dumb(nr_heads, to_fetch);
699 }
700
701 static void parse_fetch(struct strbuf *buf)
702 {
703 struct ref **to_fetch = NULL;
704 struct ref *list_head = NULL;
705 struct ref **list = &list_head;
706 int alloc_heads = 0, nr_heads = 0;
707
708 do {
709 if (!prefixcmp(buf->buf, "fetch ")) {
710 char *p = buf->buf + strlen("fetch ");
711 char *name;
712 struct ref *ref;
713 unsigned char old_sha1[20];
714
715 if (strlen(p) < 40 || get_sha1_hex(p, old_sha1))
716 die("protocol error: expected sha/ref, got %s'", p);
717 if (p[40] == ' ')
718 name = p + 41;
719 else if (!p[40])
720 name = "";
721 else
722 die("protocol error: expected sha/ref, got %s'", p);
723
724 ref = alloc_ref(name);
725 hashcpy(ref->old_sha1, old_sha1);
726
727 *list = ref;
728 list = &ref->next;
729
730 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
731 to_fetch[nr_heads++] = ref;
732 }
733 else
734 die("http transport does not support %s", buf->buf);
735
736 strbuf_reset(buf);
737 if (strbuf_getline(buf, stdin, '\n') == EOF)
738 return;
739 if (!*buf->buf)
740 break;
741 } while (1);
742
743 if (fetch(nr_heads, to_fetch))
744 exit(128); /* error already reported */
745 free_refs(list_head);
746 free(to_fetch);
747
748 printf("\n");
749 fflush(stdout);
750 strbuf_reset(buf);
751 }
752
753 static int push_dav(int nr_spec, char **specs)
754 {
755 const char **argv = xmalloc((10 + nr_spec) * sizeof(char*));
756 int argc = 0, i;
757
758 argv[argc++] = "http-push";
759 argv[argc++] = "--helper-status";
760 if (options.dry_run)
761 argv[argc++] = "--dry-run";
762 if (options.verbosity > 1)
763 argv[argc++] = "--verbose";
764 argv[argc++] = url;
765 for (i = 0; i < nr_spec; i++)
766 argv[argc++] = specs[i];
767 argv[argc++] = NULL;
768
769 if (run_command_v_opt(argv, RUN_GIT_CMD))
770 die("git-%s failed", argv[0]);
771 free(argv);
772 return 0;
773 }
774
775 static int push_git(struct discovery *heads, int nr_spec, char **specs)
776 {
777 struct rpc_state rpc;
778 const char **argv;
779 int argc = 0, i, err;
780
781 argv = xmalloc((10 + nr_spec) * sizeof(char*));
782 argv[argc++] = "send-pack";
783 argv[argc++] = "--stateless-rpc";
784 argv[argc++] = "--helper-status";
785 if (options.thin)
786 argv[argc++] = "--thin";
787 if (options.dry_run)
788 argv[argc++] = "--dry-run";
789 if (options.verbosity == 0)
790 argv[argc++] = "--quiet";
791 else if (options.verbosity > 1)
792 argv[argc++] = "--verbose";
793 argv[argc++] = options.progress ? "--progress" : "--no-progress";
794 argv[argc++] = url;
795 for (i = 0; i < nr_spec; i++)
796 argv[argc++] = specs[i];
797 argv[argc++] = NULL;
798
799 memset(&rpc, 0, sizeof(rpc));
800 rpc.service_name = "git-receive-pack",
801 rpc.argv = argv;
802
803 err = rpc_service(&rpc, heads);
804 if (rpc.result.len)
805 safe_write(1, rpc.result.buf, rpc.result.len);
806 strbuf_release(&rpc.result);
807 free(argv);
808 return err;
809 }
810
811 static int push(int nr_spec, char **specs)
812 {
813 struct discovery *heads = discover_refs("git-receive-pack");
814 int ret;
815
816 if (heads->proto_git)
817 ret = push_git(heads, nr_spec, specs);
818 else
819 ret = push_dav(nr_spec, specs);
820 free_discovery(heads);
821 return ret;
822 }
823
824 static void parse_push(struct strbuf *buf)
825 {
826 char **specs = NULL;
827 int alloc_spec = 0, nr_spec = 0, i, ret;
828
829 do {
830 if (!prefixcmp(buf->buf, "push ")) {
831 ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
832 specs[nr_spec++] = xstrdup(buf->buf + 5);
833 }
834 else
835 die("http transport does not support %s", buf->buf);
836
837 strbuf_reset(buf);
838 if (strbuf_getline(buf, stdin, '\n') == EOF)
839 goto free_specs;
840 if (!*buf->buf)
841 break;
842 } while (1);
843
844 ret = push(nr_spec, specs);
845 printf("\n");
846 fflush(stdout);
847
848 if (ret)
849 exit(128); /* error already reported */
850
851 free_specs:
852 for (i = 0; i < nr_spec; i++)
853 free(specs[i]);
854 free(specs);
855 }
856
857 int main(int argc, const char **argv)
858 {
859 struct strbuf buf = STRBUF_INIT;
860 int nongit;
861
862 git_extract_argv0_path(argv[0]);
863 setup_git_directory_gently(&nongit);
864 if (argc < 2) {
865 fprintf(stderr, "Remote needed\n");
866 return 1;
867 }
868
869 options.verbosity = 1;
870 options.progress = !!isatty(2);
871 options.thin = 1;
872
873 remote = remote_get(argv[1]);
874
875 if (argc > 2) {
876 end_url_with_slash(&buf, argv[2]);
877 } else {
878 end_url_with_slash(&buf, remote->url[0]);
879 }
880
881 url = strbuf_detach(&buf, NULL);
882
883 http_init(remote, url, 0);
884
885 do {
886 if (strbuf_getline(&buf, stdin, '\n') == EOF) {
887 if (ferror(stdin))
888 fprintf(stderr, "Error reading command stream\n");
889 else
890 fprintf(stderr, "Unexpected end of command stream\n");
891 return 1;
892 }
893 if (buf.len == 0)
894 break;
895 if (!prefixcmp(buf.buf, "fetch ")) {
896 if (nongit)
897 die("Fetch attempted without a local repo");
898 parse_fetch(&buf);
899
900 } else if (!strcmp(buf.buf, "list") || !prefixcmp(buf.buf, "list ")) {
901 int for_push = !!strstr(buf.buf + 4, "for-push");
902 output_refs(get_refs(for_push));
903
904 } else if (!prefixcmp(buf.buf, "push ")) {
905 parse_push(&buf);
906
907 } else if (!prefixcmp(buf.buf, "option ")) {
908 char *name = buf.buf + strlen("option ");
909 char *value = strchr(name, ' ');
910 int result;
911
912 if (value)
913 *value++ = '\0';
914 else
915 value = "true";
916
917 result = set_option(name, value);
918 if (!result)
919 printf("ok\n");
920 else if (result < 0)
921 printf("error invalid value\n");
922 else
923 printf("unsupported\n");
924 fflush(stdout);
925
926 } else if (!strcmp(buf.buf, "capabilities")) {
927 printf("fetch\n");
928 printf("option\n");
929 printf("push\n");
930 printf("\n");
931 fflush(stdout);
932 } else {
933 fprintf(stderr, "Unknown command '%s'\n", buf.buf);
934 return 1;
935 }
936 strbuf_reset(&buf);
937 } while (1);
938
939 http_cleanup();
940
941 return 0;
942 }