use alloc_ref rather than hand-allocating "struct ref"
[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 "string-list.h"
10 #include "sideband.h"
11 #include "argv-array.h"
12 #include "credential.h"
13 #include "sha1-array.h"
14 #include "send-pack.h"
15
16 static struct remote *remote;
17 /* always ends with a trailing slash */
18 static struct strbuf url = STRBUF_INIT;
19
20 struct options {
21 int verbosity;
22 unsigned long depth;
23 unsigned progress : 1,
24 check_self_contained_and_connected : 1,
25 cloning : 1,
26 update_shallow : 1,
27 followtags : 1,
28 dry_run : 1,
29 thin : 1,
30 /* One of the SEND_PACK_PUSH_CERT_* constants. */
31 push_cert : 2;
32 };
33 static struct options options;
34 static struct string_list cas_options = STRING_LIST_INIT_DUP;
35
36 static int set_option(const char *name, const char *value)
37 {
38 if (!strcmp(name, "verbosity")) {
39 char *end;
40 int v = strtol(value, &end, 10);
41 if (value == end || *end)
42 return -1;
43 options.verbosity = v;
44 return 0;
45 }
46 else if (!strcmp(name, "progress")) {
47 if (!strcmp(value, "true"))
48 options.progress = 1;
49 else if (!strcmp(value, "false"))
50 options.progress = 0;
51 else
52 return -1;
53 return 0;
54 }
55 else if (!strcmp(name, "depth")) {
56 char *end;
57 unsigned long v = strtoul(value, &end, 10);
58 if (value == end || *end)
59 return -1;
60 options.depth = v;
61 return 0;
62 }
63 else if (!strcmp(name, "followtags")) {
64 if (!strcmp(value, "true"))
65 options.followtags = 1;
66 else if (!strcmp(value, "false"))
67 options.followtags = 0;
68 else
69 return -1;
70 return 0;
71 }
72 else if (!strcmp(name, "dry-run")) {
73 if (!strcmp(value, "true"))
74 options.dry_run = 1;
75 else if (!strcmp(value, "false"))
76 options.dry_run = 0;
77 else
78 return -1;
79 return 0;
80 }
81 else if (!strcmp(name, "check-connectivity")) {
82 if (!strcmp(value, "true"))
83 options.check_self_contained_and_connected = 1;
84 else if (!strcmp(value, "false"))
85 options.check_self_contained_and_connected = 0;
86 else
87 return -1;
88 return 0;
89 }
90 else if (!strcmp(name, "cas")) {
91 struct strbuf val = STRBUF_INIT;
92 strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value);
93 string_list_append(&cas_options, val.buf);
94 strbuf_release(&val);
95 return 0;
96 } else if (!strcmp(name, "cloning")) {
97 if (!strcmp(value, "true"))
98 options.cloning = 1;
99 else if (!strcmp(value, "false"))
100 options.cloning = 0;
101 else
102 return -1;
103 return 0;
104 } else if (!strcmp(name, "update-shallow")) {
105 if (!strcmp(value, "true"))
106 options.update_shallow = 1;
107 else if (!strcmp(value, "false"))
108 options.update_shallow = 0;
109 else
110 return -1;
111 return 0;
112 } else if (!strcmp(name, "pushcert")) {
113 if (!strcmp(value, "true"))
114 options.push_cert = SEND_PACK_PUSH_CERT_ALWAYS;
115 else if (!strcmp(value, "false"))
116 options.push_cert = SEND_PACK_PUSH_CERT_NEVER;
117 else if (!strcmp(value, "if-asked"))
118 options.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED;
119 else
120 return -1;
121 return 0;
122 } else {
123 return 1 /* unsupported */;
124 }
125 }
126
127 struct discovery {
128 const char *service;
129 char *buf_alloc;
130 char *buf;
131 size_t len;
132 struct ref *refs;
133 struct sha1_array shallow;
134 unsigned proto_git : 1;
135 };
136 static struct discovery *last_discovery;
137
138 static struct ref *parse_git_refs(struct discovery *heads, int for_push)
139 {
140 struct ref *list = NULL;
141 get_remote_heads(-1, heads->buf, heads->len, &list,
142 for_push ? REF_NORMAL : 0, NULL, &heads->shallow);
143 return list;
144 }
145
146 static struct ref *parse_info_refs(struct discovery *heads)
147 {
148 char *data, *start, *mid;
149 char *ref_name;
150 int i = 0;
151
152 struct ref *refs = NULL;
153 struct ref *ref = NULL;
154 struct ref *last_ref = NULL;
155
156 data = heads->buf;
157 start = NULL;
158 mid = data;
159 while (i < heads->len) {
160 if (!start) {
161 start = &data[i];
162 }
163 if (data[i] == '\t')
164 mid = &data[i];
165 if (data[i] == '\n') {
166 if (mid - start != 40)
167 die("%sinfo/refs not valid: is this a git repository?",
168 url.buf);
169 data[i] = 0;
170 ref_name = mid + 1;
171 ref = alloc_ref(ref_name);
172 get_sha1_hex(start, ref->old_sha1);
173 if (!refs)
174 refs = ref;
175 if (last_ref)
176 last_ref->next = ref;
177 last_ref = ref;
178 start = NULL;
179 }
180 i++;
181 }
182
183 ref = alloc_ref("HEAD");
184 if (!http_fetch_ref(url.buf, ref) &&
185 !resolve_remote_symref(ref, refs)) {
186 ref->next = refs;
187 refs = ref;
188 } else {
189 free(ref);
190 }
191
192 return refs;
193 }
194
195 static void free_discovery(struct discovery *d)
196 {
197 if (d) {
198 if (d == last_discovery)
199 last_discovery = NULL;
200 free(d->shallow.sha1);
201 free(d->buf_alloc);
202 free_refs(d->refs);
203 free(d);
204 }
205 }
206
207 static int show_http_message(struct strbuf *type, struct strbuf *charset,
208 struct strbuf *msg)
209 {
210 const char *p, *eol;
211
212 /*
213 * We only show text/plain parts, as other types are likely
214 * to be ugly to look at on the user's terminal.
215 */
216 if (strcmp(type->buf, "text/plain"))
217 return -1;
218 if (charset->len)
219 strbuf_reencode(msg, charset->buf, get_log_output_encoding());
220
221 strbuf_trim(msg);
222 if (!msg->len)
223 return -1;
224
225 p = msg->buf;
226 do {
227 eol = strchrnul(p, '\n');
228 fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
229 p = eol + 1;
230 } while(*eol);
231 return 0;
232 }
233
234 static struct discovery *discover_refs(const char *service, int for_push)
235 {
236 struct strbuf exp = STRBUF_INIT;
237 struct strbuf type = STRBUF_INIT;
238 struct strbuf charset = STRBUF_INIT;
239 struct strbuf buffer = STRBUF_INIT;
240 struct strbuf refs_url = STRBUF_INIT;
241 struct strbuf effective_url = STRBUF_INIT;
242 struct discovery *last = last_discovery;
243 int http_ret, maybe_smart = 0;
244 struct http_get_options options;
245
246 if (last && !strcmp(service, last->service))
247 return last;
248 free_discovery(last);
249
250 strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
251 if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
252 git_env_bool("GIT_SMART_HTTP", 1)) {
253 maybe_smart = 1;
254 if (!strchr(url.buf, '?'))
255 strbuf_addch(&refs_url, '?');
256 else
257 strbuf_addch(&refs_url, '&');
258 strbuf_addf(&refs_url, "service=%s", service);
259 }
260
261 memset(&options, 0, sizeof(options));
262 options.content_type = &type;
263 options.charset = &charset;
264 options.effective_url = &effective_url;
265 options.base_url = &url;
266 options.no_cache = 1;
267 options.keep_error = 1;
268
269 http_ret = http_get_strbuf(refs_url.buf, &buffer, &options);
270 switch (http_ret) {
271 case HTTP_OK:
272 break;
273 case HTTP_MISSING_TARGET:
274 show_http_message(&type, &charset, &buffer);
275 die("repository '%s' not found", url.buf);
276 case HTTP_NOAUTH:
277 show_http_message(&type, &charset, &buffer);
278 die("Authentication failed for '%s'", url.buf);
279 default:
280 show_http_message(&type, &charset, &buffer);
281 die("unable to access '%s': %s", url.buf, curl_errorstr);
282 }
283
284 last= xcalloc(1, sizeof(*last_discovery));
285 last->service = service;
286 last->buf_alloc = strbuf_detach(&buffer, &last->len);
287 last->buf = last->buf_alloc;
288
289 strbuf_addf(&exp, "application/x-%s-advertisement", service);
290 if (maybe_smart &&
291 (5 <= last->len && last->buf[4] == '#') &&
292 !strbuf_cmp(&exp, &type)) {
293 char *line;
294
295 /*
296 * smart HTTP response; validate that the service
297 * pkt-line matches our request.
298 */
299 line = packet_read_line_buf(&last->buf, &last->len, NULL);
300
301 strbuf_reset(&exp);
302 strbuf_addf(&exp, "# service=%s", service);
303 if (strcmp(line, exp.buf))
304 die("invalid server response; got '%s'", line);
305 strbuf_release(&exp);
306
307 /* The header can include additional metadata lines, up
308 * until a packet flush marker. Ignore these now, but
309 * in the future we might start to scan them.
310 */
311 while (packet_read_line_buf(&last->buf, &last->len, NULL))
312 ;
313
314 last->proto_git = 1;
315 }
316
317 if (last->proto_git)
318 last->refs = parse_git_refs(last, for_push);
319 else
320 last->refs = parse_info_refs(last);
321
322 strbuf_release(&refs_url);
323 strbuf_release(&exp);
324 strbuf_release(&type);
325 strbuf_release(&charset);
326 strbuf_release(&effective_url);
327 strbuf_release(&buffer);
328 last_discovery = last;
329 return last;
330 }
331
332 static struct ref *get_refs(int for_push)
333 {
334 struct discovery *heads;
335
336 if (for_push)
337 heads = discover_refs("git-receive-pack", for_push);
338 else
339 heads = discover_refs("git-upload-pack", for_push);
340
341 return heads->refs;
342 }
343
344 static void output_refs(struct ref *refs)
345 {
346 struct ref *posn;
347 for (posn = refs; posn; posn = posn->next) {
348 if (posn->symref)
349 printf("@%s %s\n", posn->symref, posn->name);
350 else
351 printf("%s %s\n", sha1_to_hex(posn->old_sha1), posn->name);
352 }
353 printf("\n");
354 fflush(stdout);
355 }
356
357 struct rpc_state {
358 const char *service_name;
359 const char **argv;
360 struct strbuf *stdin_preamble;
361 char *service_url;
362 char *hdr_content_type;
363 char *hdr_accept;
364 char *buf;
365 size_t alloc;
366 size_t len;
367 size_t pos;
368 int in;
369 int out;
370 struct strbuf result;
371 unsigned gzip_request : 1;
372 unsigned initial_buffer : 1;
373 };
374
375 static size_t rpc_out(void *ptr, size_t eltsize,
376 size_t nmemb, void *buffer_)
377 {
378 size_t max = eltsize * nmemb;
379 struct rpc_state *rpc = buffer_;
380 size_t avail = rpc->len - rpc->pos;
381
382 if (!avail) {
383 rpc->initial_buffer = 0;
384 avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
385 if (!avail)
386 return 0;
387 rpc->pos = 0;
388 rpc->len = avail;
389 }
390
391 if (max < avail)
392 avail = max;
393 memcpy(ptr, rpc->buf + rpc->pos, avail);
394 rpc->pos += avail;
395 return avail;
396 }
397
398 #ifndef NO_CURL_IOCTL
399 static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
400 {
401 struct rpc_state *rpc = clientp;
402
403 switch (cmd) {
404 case CURLIOCMD_NOP:
405 return CURLIOE_OK;
406
407 case CURLIOCMD_RESTARTREAD:
408 if (rpc->initial_buffer) {
409 rpc->pos = 0;
410 return CURLIOE_OK;
411 }
412 error("unable to rewind rpc post data - try increasing http.postBuffer");
413 return CURLIOE_FAILRESTART;
414
415 default:
416 return CURLIOE_UNKNOWNCMD;
417 }
418 }
419 #endif
420
421 static size_t rpc_in(char *ptr, size_t eltsize,
422 size_t nmemb, void *buffer_)
423 {
424 size_t size = eltsize * nmemb;
425 struct rpc_state *rpc = buffer_;
426 write_or_die(rpc->in, ptr, size);
427 return size;
428 }
429
430 static int run_slot(struct active_request_slot *slot,
431 struct slot_results *results)
432 {
433 int err;
434 struct slot_results results_buf;
435
436 if (!results)
437 results = &results_buf;
438
439 err = run_one_slot(slot, results);
440
441 if (err != HTTP_OK && err != HTTP_REAUTH) {
442 error("RPC failed; result=%d, HTTP code = %ld",
443 results->curl_result, results->http_code);
444 }
445
446 return err;
447 }
448
449 static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
450 {
451 struct active_request_slot *slot;
452 struct curl_slist *headers = NULL;
453 struct strbuf buf = STRBUF_INIT;
454 int err;
455
456 slot = get_active_slot();
457
458 headers = curl_slist_append(headers, rpc->hdr_content_type);
459 headers = curl_slist_append(headers, rpc->hdr_accept);
460
461 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
462 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
463 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
464 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
465 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
466 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
467 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
468 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
469 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
470
471 err = run_slot(slot, results);
472
473 curl_slist_free_all(headers);
474 strbuf_release(&buf);
475 return err;
476 }
477
478 static int post_rpc(struct rpc_state *rpc)
479 {
480 struct active_request_slot *slot;
481 struct curl_slist *headers = NULL;
482 int use_gzip = rpc->gzip_request;
483 char *gzip_body = NULL;
484 size_t gzip_size = 0;
485 int err, large_request = 0;
486 int needs_100_continue = 0;
487
488 /* Try to load the entire request, if we can fit it into the
489 * allocated buffer space we can use HTTP/1.0 and avoid the
490 * chunked encoding mess.
491 */
492 while (1) {
493 size_t left = rpc->alloc - rpc->len;
494 char *buf = rpc->buf + rpc->len;
495 int n;
496
497 if (left < LARGE_PACKET_MAX) {
498 large_request = 1;
499 use_gzip = 0;
500 break;
501 }
502
503 n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
504 if (!n)
505 break;
506 rpc->len += n;
507 }
508
509 if (large_request) {
510 struct slot_results results;
511
512 do {
513 err = probe_rpc(rpc, &results);
514 if (err == HTTP_REAUTH)
515 credential_fill(&http_auth);
516 } while (err == HTTP_REAUTH);
517 if (err != HTTP_OK)
518 return -1;
519
520 if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
521 needs_100_continue = 1;
522 }
523
524 headers = curl_slist_append(headers, rpc->hdr_content_type);
525 headers = curl_slist_append(headers, rpc->hdr_accept);
526 headers = curl_slist_append(headers, needs_100_continue ?
527 "Expect: 100-continue" : "Expect:");
528
529 retry:
530 slot = get_active_slot();
531
532 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
533 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
534 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
535 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
536
537 if (large_request) {
538 /* The request body is large and the size cannot be predicted.
539 * We must use chunked encoding to send it.
540 */
541 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
542 rpc->initial_buffer = 1;
543 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
544 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
545 #ifndef NO_CURL_IOCTL
546 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
547 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
548 #endif
549 if (options.verbosity > 1) {
550 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
551 fflush(stderr);
552 }
553
554 } else if (gzip_body) {
555 /*
556 * If we are looping to retry authentication, then the previous
557 * run will have set up the headers and gzip buffer already,
558 * and we just need to send it.
559 */
560 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
561 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size);
562
563 } else if (use_gzip && 1024 < rpc->len) {
564 /* The client backend isn't giving us compressed data so
565 * we can try to deflate it ourselves, this may save on.
566 * the transfer time.
567 */
568 git_zstream stream;
569 int ret;
570
571 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
572 gzip_size = git_deflate_bound(&stream, rpc->len);
573 gzip_body = xmalloc(gzip_size);
574
575 stream.next_in = (unsigned char *)rpc->buf;
576 stream.avail_in = rpc->len;
577 stream.next_out = (unsigned char *)gzip_body;
578 stream.avail_out = gzip_size;
579
580 ret = git_deflate(&stream, Z_FINISH);
581 if (ret != Z_STREAM_END)
582 die("cannot deflate request; zlib deflate error %d", ret);
583
584 ret = git_deflate_end_gently(&stream);
585 if (ret != Z_OK)
586 die("cannot deflate request; zlib end error %d", ret);
587
588 gzip_size = stream.total_out;
589
590 headers = curl_slist_append(headers, "Content-Encoding: gzip");
591 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
592 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size);
593
594 if (options.verbosity > 1) {
595 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
596 rpc->service_name,
597 (unsigned long)rpc->len, (unsigned long)gzip_size);
598 fflush(stderr);
599 }
600 } else {
601 /* We know the complete request size in advance, use the
602 * more normal Content-Length approach.
603 */
604 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
605 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, rpc->len);
606 if (options.verbosity > 1) {
607 fprintf(stderr, "POST %s (%lu bytes)\n",
608 rpc->service_name, (unsigned long)rpc->len);
609 fflush(stderr);
610 }
611 }
612
613 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
614 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
615 curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
616
617 err = run_slot(slot, NULL);
618 if (err == HTTP_REAUTH && !large_request) {
619 credential_fill(&http_auth);
620 goto retry;
621 }
622 if (err != HTTP_OK)
623 err = -1;
624
625 curl_slist_free_all(headers);
626 free(gzip_body);
627 return err;
628 }
629
630 static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
631 {
632 const char *svc = rpc->service_name;
633 struct strbuf buf = STRBUF_INIT;
634 struct strbuf *preamble = rpc->stdin_preamble;
635 struct child_process client = CHILD_PROCESS_INIT;
636 int err = 0;
637
638 client.in = -1;
639 client.out = -1;
640 client.git_cmd = 1;
641 client.argv = rpc->argv;
642 if (start_command(&client))
643 exit(1);
644 if (preamble)
645 write_or_die(client.in, preamble->buf, preamble->len);
646 if (heads)
647 write_or_die(client.in, heads->buf, heads->len);
648
649 rpc->alloc = http_post_buffer;
650 rpc->buf = xmalloc(rpc->alloc);
651 rpc->in = client.in;
652 rpc->out = client.out;
653 strbuf_init(&rpc->result, 0);
654
655 strbuf_addf(&buf, "%s%s", url.buf, svc);
656 rpc->service_url = strbuf_detach(&buf, NULL);
657
658 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
659 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
660
661 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
662 rpc->hdr_accept = strbuf_detach(&buf, NULL);
663
664 while (!err) {
665 int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
666 if (!n)
667 break;
668 rpc->pos = 0;
669 rpc->len = n;
670 err |= post_rpc(rpc);
671 }
672
673 close(client.in);
674 client.in = -1;
675 if (!err) {
676 strbuf_read(&rpc->result, client.out, 0);
677 } else {
678 char buf[4096];
679 for (;;)
680 if (xread(client.out, buf, sizeof(buf)) <= 0)
681 break;
682 }
683
684 close(client.out);
685 client.out = -1;
686
687 err |= finish_command(&client);
688 free(rpc->service_url);
689 free(rpc->hdr_content_type);
690 free(rpc->hdr_accept);
691 free(rpc->buf);
692 strbuf_release(&buf);
693 return err;
694 }
695
696 static int fetch_dumb(int nr_heads, struct ref **to_fetch)
697 {
698 struct walker *walker;
699 char **targets = xmalloc(nr_heads * sizeof(char*));
700 int ret, i;
701
702 if (options.depth)
703 die("dumb http transport does not support --depth");
704 for (i = 0; i < nr_heads; i++)
705 targets[i] = xstrdup(sha1_to_hex(to_fetch[i]->old_sha1));
706
707 walker = get_http_walker(url.buf);
708 walker->get_all = 1;
709 walker->get_tree = 1;
710 walker->get_history = 1;
711 walker->get_verbosely = options.verbosity >= 3;
712 walker->get_recover = 0;
713 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
714 walker_free(walker);
715
716 for (i = 0; i < nr_heads; i++)
717 free(targets[i]);
718 free(targets);
719
720 return ret ? error("fetch failed.") : 0;
721 }
722
723 static int fetch_git(struct discovery *heads,
724 int nr_heads, struct ref **to_fetch)
725 {
726 struct rpc_state rpc;
727 struct strbuf preamble = STRBUF_INIT;
728 char *depth_arg = NULL;
729 int argc = 0, i, err;
730 const char *argv[17];
731
732 argv[argc++] = "fetch-pack";
733 argv[argc++] = "--stateless-rpc";
734 argv[argc++] = "--stdin";
735 argv[argc++] = "--lock-pack";
736 if (options.followtags)
737 argv[argc++] = "--include-tag";
738 if (options.thin)
739 argv[argc++] = "--thin";
740 if (options.verbosity >= 3) {
741 argv[argc++] = "-v";
742 argv[argc++] = "-v";
743 }
744 if (options.check_self_contained_and_connected)
745 argv[argc++] = "--check-self-contained-and-connected";
746 if (options.cloning)
747 argv[argc++] = "--cloning";
748 if (options.update_shallow)
749 argv[argc++] = "--update-shallow";
750 if (!options.progress)
751 argv[argc++] = "--no-progress";
752 if (options.depth) {
753 struct strbuf buf = STRBUF_INIT;
754 strbuf_addf(&buf, "--depth=%lu", options.depth);
755 depth_arg = strbuf_detach(&buf, NULL);
756 argv[argc++] = depth_arg;
757 }
758 argv[argc++] = url.buf;
759 argv[argc++] = NULL;
760
761 for (i = 0; i < nr_heads; i++) {
762 struct ref *ref = to_fetch[i];
763 if (!*ref->name)
764 die("cannot fetch by sha1 over smart http");
765 packet_buf_write(&preamble, "%s %s\n",
766 sha1_to_hex(ref->old_sha1), ref->name);
767 }
768 packet_buf_flush(&preamble);
769
770 memset(&rpc, 0, sizeof(rpc));
771 rpc.service_name = "git-upload-pack",
772 rpc.argv = argv;
773 rpc.stdin_preamble = &preamble;
774 rpc.gzip_request = 1;
775
776 err = rpc_service(&rpc, heads);
777 if (rpc.result.len)
778 write_or_die(1, rpc.result.buf, rpc.result.len);
779 strbuf_release(&rpc.result);
780 strbuf_release(&preamble);
781 free(depth_arg);
782 return err;
783 }
784
785 static int fetch(int nr_heads, struct ref **to_fetch)
786 {
787 struct discovery *d = discover_refs("git-upload-pack", 0);
788 if (d->proto_git)
789 return fetch_git(d, nr_heads, to_fetch);
790 else
791 return fetch_dumb(nr_heads, to_fetch);
792 }
793
794 static void parse_fetch(struct strbuf *buf)
795 {
796 struct ref **to_fetch = NULL;
797 struct ref *list_head = NULL;
798 struct ref **list = &list_head;
799 int alloc_heads = 0, nr_heads = 0;
800
801 do {
802 const char *p;
803 if (skip_prefix(buf->buf, "fetch ", &p)) {
804 const char *name;
805 struct ref *ref;
806 unsigned char old_sha1[20];
807
808 if (strlen(p) < 40 || get_sha1_hex(p, old_sha1))
809 die("protocol error: expected sha/ref, got %s'", p);
810 if (p[40] == ' ')
811 name = p + 41;
812 else if (!p[40])
813 name = "";
814 else
815 die("protocol error: expected sha/ref, got %s'", p);
816
817 ref = alloc_ref(name);
818 hashcpy(ref->old_sha1, old_sha1);
819
820 *list = ref;
821 list = &ref->next;
822
823 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
824 to_fetch[nr_heads++] = ref;
825 }
826 else
827 die("http transport does not support %s", buf->buf);
828
829 strbuf_reset(buf);
830 if (strbuf_getline(buf, stdin, '\n') == EOF)
831 return;
832 if (!*buf->buf)
833 break;
834 } while (1);
835
836 if (fetch(nr_heads, to_fetch))
837 exit(128); /* error already reported */
838 free_refs(list_head);
839 free(to_fetch);
840
841 printf("\n");
842 fflush(stdout);
843 strbuf_reset(buf);
844 }
845
846 static int push_dav(int nr_spec, char **specs)
847 {
848 const char **argv = xmalloc((10 + nr_spec) * sizeof(char*));
849 int argc = 0, i;
850
851 argv[argc++] = "http-push";
852 argv[argc++] = "--helper-status";
853 if (options.dry_run)
854 argv[argc++] = "--dry-run";
855 if (options.verbosity > 1)
856 argv[argc++] = "--verbose";
857 argv[argc++] = url.buf;
858 for (i = 0; i < nr_spec; i++)
859 argv[argc++] = specs[i];
860 argv[argc++] = NULL;
861
862 if (run_command_v_opt(argv, RUN_GIT_CMD))
863 die("git-%s failed", argv[0]);
864 free(argv);
865 return 0;
866 }
867
868 static int push_git(struct discovery *heads, int nr_spec, char **specs)
869 {
870 struct rpc_state rpc;
871 int i, err;
872 struct argv_array args;
873 struct string_list_item *cas_option;
874 struct strbuf preamble = STRBUF_INIT;
875
876 argv_array_init(&args);
877 argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
878 NULL);
879
880 if (options.thin)
881 argv_array_push(&args, "--thin");
882 if (options.dry_run)
883 argv_array_push(&args, "--dry-run");
884 if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS)
885 argv_array_push(&args, "--signed=yes");
886 else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED)
887 argv_array_push(&args, "--signed=if-asked");
888 if (options.verbosity == 0)
889 argv_array_push(&args, "--quiet");
890 else if (options.verbosity > 1)
891 argv_array_push(&args, "--verbose");
892 argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
893 for_each_string_list_item(cas_option, &cas_options)
894 argv_array_push(&args, cas_option->string);
895 argv_array_push(&args, url.buf);
896
897 argv_array_push(&args, "--stdin");
898 for (i = 0; i < nr_spec; i++)
899 packet_buf_write(&preamble, "%s\n", specs[i]);
900 packet_buf_flush(&preamble);
901
902 memset(&rpc, 0, sizeof(rpc));
903 rpc.service_name = "git-receive-pack",
904 rpc.argv = args.argv;
905 rpc.stdin_preamble = &preamble;
906
907 err = rpc_service(&rpc, heads);
908 if (rpc.result.len)
909 write_or_die(1, rpc.result.buf, rpc.result.len);
910 strbuf_release(&rpc.result);
911 strbuf_release(&preamble);
912 argv_array_clear(&args);
913 return err;
914 }
915
916 static int push(int nr_spec, char **specs)
917 {
918 struct discovery *heads = discover_refs("git-receive-pack", 1);
919 int ret;
920
921 if (heads->proto_git)
922 ret = push_git(heads, nr_spec, specs);
923 else
924 ret = push_dav(nr_spec, specs);
925 free_discovery(heads);
926 return ret;
927 }
928
929 static void parse_push(struct strbuf *buf)
930 {
931 char **specs = NULL;
932 int alloc_spec = 0, nr_spec = 0, i, ret;
933
934 do {
935 if (starts_with(buf->buf, "push ")) {
936 ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
937 specs[nr_spec++] = xstrdup(buf->buf + 5);
938 }
939 else
940 die("http transport does not support %s", buf->buf);
941
942 strbuf_reset(buf);
943 if (strbuf_getline(buf, stdin, '\n') == EOF)
944 goto free_specs;
945 if (!*buf->buf)
946 break;
947 } while (1);
948
949 ret = push(nr_spec, specs);
950 printf("\n");
951 fflush(stdout);
952
953 if (ret)
954 exit(128); /* error already reported */
955
956 free_specs:
957 for (i = 0; i < nr_spec; i++)
958 free(specs[i]);
959 free(specs);
960 }
961
962 int main(int argc, const char **argv)
963 {
964 struct strbuf buf = STRBUF_INIT;
965 int nongit;
966
967 git_setup_gettext();
968
969 git_extract_argv0_path(argv[0]);
970 setup_git_directory_gently(&nongit);
971 if (argc < 2) {
972 error("remote-curl: usage: git remote-curl <remote> [<url>]");
973 return 1;
974 }
975
976 options.verbosity = 1;
977 options.progress = !!isatty(2);
978 options.thin = 1;
979
980 remote = remote_get(argv[1]);
981
982 if (argc > 2) {
983 end_url_with_slash(&url, argv[2]);
984 } else {
985 end_url_with_slash(&url, remote->url[0]);
986 }
987
988 http_init(remote, url.buf, 0);
989
990 do {
991 const char *arg;
992
993 if (strbuf_getline(&buf, stdin, '\n') == EOF) {
994 if (ferror(stdin))
995 error("remote-curl: error reading command stream from git");
996 return 1;
997 }
998 if (buf.len == 0)
999 break;
1000 if (starts_with(buf.buf, "fetch ")) {
1001 if (nongit)
1002 die("remote-curl: fetch attempted without a local repo");
1003 parse_fetch(&buf);
1004
1005 } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1006 int for_push = !!strstr(buf.buf + 4, "for-push");
1007 output_refs(get_refs(for_push));
1008
1009 } else if (starts_with(buf.buf, "push ")) {
1010 parse_push(&buf);
1011
1012 } else if (skip_prefix(buf.buf, "option ", &arg)) {
1013 char *value = strchr(arg, ' ');
1014 int result;
1015
1016 if (value)
1017 *value++ = '\0';
1018 else
1019 value = "true";
1020
1021 result = set_option(arg, value);
1022 if (!result)
1023 printf("ok\n");
1024 else if (result < 0)
1025 printf("error invalid value\n");
1026 else
1027 printf("unsupported\n");
1028 fflush(stdout);
1029
1030 } else if (!strcmp(buf.buf, "capabilities")) {
1031 printf("fetch\n");
1032 printf("option\n");
1033 printf("push\n");
1034 printf("check-connectivity\n");
1035 printf("\n");
1036 fflush(stdout);
1037 } else {
1038 error("remote-curl: unknown command '%s' from git", buf.buf);
1039 return 1;
1040 }
1041 strbuf_reset(&buf);
1042 } while (1);
1043
1044 http_cleanup();
1045
1046 return 0;
1047 }