Documentation/describe: improve one-line summary
[git.git] / remote-curl.c
blobdd63bc27abf8ae4b9e480ba1bb88942db11a0e48
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"
15 static struct remote *remote;
16 /* always ends with a trailing slash */
17 static struct strbuf url = STRBUF_INIT;
19 struct options {
20 int verbosity;
21 unsigned long depth;
22 unsigned progress : 1,
23 check_self_contained_and_connected : 1,
24 cloning : 1,
25 update_shallow : 1,
26 followtags : 1,
27 dry_run : 1,
28 thin : 1,
29 push_cert : 1;
31 static struct options options;
32 static struct string_list cas_options = STRING_LIST_INIT_DUP;
34 static int set_option(const char *name, const char *value)
36 if (!strcmp(name, "verbosity")) {
37 char *end;
38 int v = strtol(value, &end, 10);
39 if (value == end || *end)
40 return -1;
41 options.verbosity = v;
42 return 0;
44 else if (!strcmp(name, "progress")) {
45 if (!strcmp(value, "true"))
46 options.progress = 1;
47 else if (!strcmp(value, "false"))
48 options.progress = 0;
49 else
50 return -1;
51 return 0;
53 else if (!strcmp(name, "depth")) {
54 char *end;
55 unsigned long v = strtoul(value, &end, 10);
56 if (value == end || *end)
57 return -1;
58 options.depth = v;
59 return 0;
61 else if (!strcmp(name, "followtags")) {
62 if (!strcmp(value, "true"))
63 options.followtags = 1;
64 else if (!strcmp(value, "false"))
65 options.followtags = 0;
66 else
67 return -1;
68 return 0;
70 else if (!strcmp(name, "dry-run")) {
71 if (!strcmp(value, "true"))
72 options.dry_run = 1;
73 else if (!strcmp(value, "false"))
74 options.dry_run = 0;
75 else
76 return -1;
77 return 0;
79 else if (!strcmp(name, "check-connectivity")) {
80 if (!strcmp(value, "true"))
81 options.check_self_contained_and_connected = 1;
82 else if (!strcmp(value, "false"))
83 options.check_self_contained_and_connected = 0;
84 else
85 return -1;
86 return 0;
88 else if (!strcmp(name, "cas")) {
89 struct strbuf val = STRBUF_INIT;
90 strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value);
91 string_list_append(&cas_options, val.buf);
92 strbuf_release(&val);
93 return 0;
94 } else if (!strcmp(name, "cloning")) {
95 if (!strcmp(value, "true"))
96 options.cloning = 1;
97 else if (!strcmp(value, "false"))
98 options.cloning = 0;
99 else
100 return -1;
101 return 0;
102 } else if (!strcmp(name, "update-shallow")) {
103 if (!strcmp(value, "true"))
104 options.update_shallow = 1;
105 else if (!strcmp(value, "false"))
106 options.update_shallow = 0;
107 else
108 return -1;
109 return 0;
110 } else if (!strcmp(name, "pushcert")) {
111 if (!strcmp(value, "true"))
112 options.push_cert = 1;
113 else if (!strcmp(value, "false"))
114 options.push_cert = 0;
115 else
116 return -1;
117 return 0;
118 } else {
119 return 1 /* unsupported */;
123 struct discovery {
124 const char *service;
125 char *buf_alloc;
126 char *buf;
127 size_t len;
128 struct ref *refs;
129 struct sha1_array shallow;
130 unsigned proto_git : 1;
132 static struct discovery *last_discovery;
134 static struct ref *parse_git_refs(struct discovery *heads, int for_push)
136 struct ref *list = NULL;
137 get_remote_heads(-1, heads->buf, heads->len, &list,
138 for_push ? REF_NORMAL : 0, NULL, &heads->shallow);
139 return list;
142 static struct ref *parse_info_refs(struct discovery *heads)
144 char *data, *start, *mid;
145 char *ref_name;
146 int i = 0;
148 struct ref *refs = NULL;
149 struct ref *ref = NULL;
150 struct ref *last_ref = NULL;
152 data = heads->buf;
153 start = NULL;
154 mid = data;
155 while (i < heads->len) {
156 if (!start) {
157 start = &data[i];
159 if (data[i] == '\t')
160 mid = &data[i];
161 if (data[i] == '\n') {
162 if (mid - start != 40)
163 die("%sinfo/refs not valid: is this a git repository?",
164 url.buf);
165 data[i] = 0;
166 ref_name = mid + 1;
167 ref = xmalloc(sizeof(struct ref) +
168 strlen(ref_name) + 1);
169 memset(ref, 0, sizeof(struct ref));
170 strcpy(ref->name, ref_name);
171 get_sha1_hex(start, ref->old_sha1);
172 if (!refs)
173 refs = ref;
174 if (last_ref)
175 last_ref->next = ref;
176 last_ref = ref;
177 start = NULL;
179 i++;
182 ref = alloc_ref("HEAD");
183 if (!http_fetch_ref(url.buf, ref) &&
184 !resolve_remote_symref(ref, refs)) {
185 ref->next = refs;
186 refs = ref;
187 } else {
188 free(ref);
191 return refs;
194 static void free_discovery(struct discovery *d)
196 if (d) {
197 if (d == last_discovery)
198 last_discovery = NULL;
199 free(d->shallow.sha1);
200 free(d->buf_alloc);
201 free_refs(d->refs);
202 free(d);
206 static int show_http_message(struct strbuf *type, struct strbuf *charset,
207 struct strbuf *msg)
209 const char *p, *eol;
212 * We only show text/plain parts, as other types are likely
213 * to be ugly to look at on the user's terminal.
215 if (strcmp(type->buf, "text/plain"))
216 return -1;
217 if (charset->len)
218 strbuf_reencode(msg, charset->buf, get_log_output_encoding());
220 strbuf_trim(msg);
221 if (!msg->len)
222 return -1;
224 p = msg->buf;
225 do {
226 eol = strchrnul(p, '\n');
227 fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
228 p = eol + 1;
229 } while(*eol);
230 return 0;
233 static struct discovery *discover_refs(const char *service, int for_push)
235 struct strbuf exp = STRBUF_INIT;
236 struct strbuf type = STRBUF_INIT;
237 struct strbuf charset = STRBUF_INIT;
238 struct strbuf buffer = STRBUF_INIT;
239 struct strbuf refs_url = STRBUF_INIT;
240 struct strbuf effective_url = STRBUF_INIT;
241 struct discovery *last = last_discovery;
242 int http_ret, maybe_smart = 0;
243 struct http_get_options options;
245 if (last && !strcmp(service, last->service))
246 return last;
247 free_discovery(last);
249 strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
250 if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
251 git_env_bool("GIT_SMART_HTTP", 1)) {
252 maybe_smart = 1;
253 if (!strchr(url.buf, '?'))
254 strbuf_addch(&refs_url, '?');
255 else
256 strbuf_addch(&refs_url, '&');
257 strbuf_addf(&refs_url, "service=%s", service);
260 memset(&options, 0, sizeof(options));
261 options.content_type = &type;
262 options.charset = &charset;
263 options.effective_url = &effective_url;
264 options.base_url = &url;
265 options.no_cache = 1;
266 options.keep_error = 1;
268 http_ret = http_get_strbuf(refs_url.buf, &buffer, &options);
269 switch (http_ret) {
270 case HTTP_OK:
271 break;
272 case HTTP_MISSING_TARGET:
273 show_http_message(&type, &charset, &buffer);
274 die("repository '%s' not found", url.buf);
275 case HTTP_NOAUTH:
276 show_http_message(&type, &charset, &buffer);
277 die("Authentication failed for '%s'", url.buf);
278 default:
279 show_http_message(&type, &charset, &buffer);
280 die("unable to access '%s': %s", url.buf, curl_errorstr);
283 last= xcalloc(1, sizeof(*last_discovery));
284 last->service = service;
285 last->buf_alloc = strbuf_detach(&buffer, &last->len);
286 last->buf = last->buf_alloc;
288 strbuf_addf(&exp, "application/x-%s-advertisement", service);
289 if (maybe_smart &&
290 (5 <= last->len && last->buf[4] == '#') &&
291 !strbuf_cmp(&exp, &type)) {
292 char *line;
295 * smart HTTP response; validate that the service
296 * pkt-line matches our request.
298 line = packet_read_line_buf(&last->buf, &last->len, NULL);
300 strbuf_reset(&exp);
301 strbuf_addf(&exp, "# service=%s", service);
302 if (strcmp(line, exp.buf))
303 die("invalid server response; got '%s'", line);
304 strbuf_release(&exp);
306 /* The header can include additional metadata lines, up
307 * until a packet flush marker. Ignore these now, but
308 * in the future we might start to scan them.
310 while (packet_read_line_buf(&last->buf, &last->len, NULL))
313 last->proto_git = 1;
316 if (last->proto_git)
317 last->refs = parse_git_refs(last, for_push);
318 else
319 last->refs = parse_info_refs(last);
321 strbuf_release(&refs_url);
322 strbuf_release(&exp);
323 strbuf_release(&type);
324 strbuf_release(&charset);
325 strbuf_release(&effective_url);
326 strbuf_release(&buffer);
327 last_discovery = last;
328 return last;
331 static struct ref *get_refs(int for_push)
333 struct discovery *heads;
335 if (for_push)
336 heads = discover_refs("git-receive-pack", for_push);
337 else
338 heads = discover_refs("git-upload-pack", for_push);
340 return heads->refs;
343 static void output_refs(struct ref *refs)
345 struct ref *posn;
346 for (posn = refs; posn; posn = posn->next) {
347 if (posn->symref)
348 printf("@%s %s\n", posn->symref, posn->name);
349 else
350 printf("%s %s\n", sha1_to_hex(posn->old_sha1), posn->name);
352 printf("\n");
353 fflush(stdout);
356 struct rpc_state {
357 const char *service_name;
358 const char **argv;
359 struct strbuf *stdin_preamble;
360 char *service_url;
361 char *hdr_content_type;
362 char *hdr_accept;
363 char *buf;
364 size_t alloc;
365 size_t len;
366 size_t pos;
367 int in;
368 int out;
369 struct strbuf result;
370 unsigned gzip_request : 1;
371 unsigned initial_buffer : 1;
374 static size_t rpc_out(void *ptr, size_t eltsize,
375 size_t nmemb, void *buffer_)
377 size_t max = eltsize * nmemb;
378 struct rpc_state *rpc = buffer_;
379 size_t avail = rpc->len - rpc->pos;
381 if (!avail) {
382 rpc->initial_buffer = 0;
383 avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
384 if (!avail)
385 return 0;
386 rpc->pos = 0;
387 rpc->len = avail;
390 if (max < avail)
391 avail = max;
392 memcpy(ptr, rpc->buf + rpc->pos, avail);
393 rpc->pos += avail;
394 return avail;
397 #ifndef NO_CURL_IOCTL
398 static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
400 struct rpc_state *rpc = clientp;
402 switch (cmd) {
403 case CURLIOCMD_NOP:
404 return CURLIOE_OK;
406 case CURLIOCMD_RESTARTREAD:
407 if (rpc->initial_buffer) {
408 rpc->pos = 0;
409 return CURLIOE_OK;
411 error("unable to rewind rpc post data - try increasing http.postBuffer");
412 return CURLIOE_FAILRESTART;
414 default:
415 return CURLIOE_UNKNOWNCMD;
418 #endif
420 static size_t rpc_in(char *ptr, size_t eltsize,
421 size_t nmemb, void *buffer_)
423 size_t size = eltsize * nmemb;
424 struct rpc_state *rpc = buffer_;
425 write_or_die(rpc->in, ptr, size);
426 return size;
429 static int run_slot(struct active_request_slot *slot,
430 struct slot_results *results)
432 int err;
433 struct slot_results results_buf;
435 if (!results)
436 results = &results_buf;
438 err = run_one_slot(slot, results);
440 if (err != HTTP_OK && err != HTTP_REAUTH) {
441 error("RPC failed; result=%d, HTTP code = %ld",
442 results->curl_result, results->http_code);
445 return err;
448 static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
450 struct active_request_slot *slot;
451 struct curl_slist *headers = NULL;
452 struct strbuf buf = STRBUF_INIT;
453 int err;
455 slot = get_active_slot();
457 headers = curl_slist_append(headers, rpc->hdr_content_type);
458 headers = curl_slist_append(headers, rpc->hdr_accept);
460 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
461 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
462 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
463 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
464 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
465 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
466 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
467 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
468 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
470 err = run_slot(slot, results);
472 curl_slist_free_all(headers);
473 strbuf_release(&buf);
474 return err;
477 static int post_rpc(struct rpc_state *rpc)
479 struct active_request_slot *slot;
480 struct curl_slist *headers = NULL;
481 int use_gzip = rpc->gzip_request;
482 char *gzip_body = NULL;
483 size_t gzip_size = 0;
484 int err, large_request = 0;
485 int needs_100_continue = 0;
487 /* Try to load the entire request, if we can fit it into the
488 * allocated buffer space we can use HTTP/1.0 and avoid the
489 * chunked encoding mess.
491 while (1) {
492 size_t left = rpc->alloc - rpc->len;
493 char *buf = rpc->buf + rpc->len;
494 int n;
496 if (left < LARGE_PACKET_MAX) {
497 large_request = 1;
498 use_gzip = 0;
499 break;
502 n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
503 if (!n)
504 break;
505 rpc->len += n;
508 if (large_request) {
509 struct slot_results results;
511 do {
512 err = probe_rpc(rpc, &results);
513 if (err == HTTP_REAUTH)
514 credential_fill(&http_auth);
515 } while (err == HTTP_REAUTH);
516 if (err != HTTP_OK)
517 return -1;
519 if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
520 needs_100_continue = 1;
523 headers = curl_slist_append(headers, rpc->hdr_content_type);
524 headers = curl_slist_append(headers, rpc->hdr_accept);
525 headers = curl_slist_append(headers, needs_100_continue ?
526 "Expect: 100-continue" : "Expect:");
528 retry:
529 slot = get_active_slot();
531 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
532 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
533 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
534 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
536 if (large_request) {
537 /* The request body is large and the size cannot be predicted.
538 * We must use chunked encoding to send it.
540 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
541 rpc->initial_buffer = 1;
542 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
543 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
544 #ifndef NO_CURL_IOCTL
545 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
546 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
547 #endif
548 if (options.verbosity > 1) {
549 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
550 fflush(stderr);
553 } else if (gzip_body) {
555 * If we are looping to retry authentication, then the previous
556 * run will have set up the headers and gzip buffer already,
557 * and we just need to send it.
559 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
560 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size);
562 } else if (use_gzip && 1024 < rpc->len) {
563 /* The client backend isn't giving us compressed data so
564 * we can try to deflate it ourselves, this may save on.
565 * the transfer time.
567 git_zstream stream;
568 int ret;
570 memset(&stream, 0, sizeof(stream));
571 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
572 gzip_size = git_deflate_bound(&stream, rpc->len);
573 gzip_body = xmalloc(gzip_size);
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;
580 ret = git_deflate(&stream, Z_FINISH);
581 if (ret != Z_STREAM_END)
582 die("cannot deflate request; zlib deflate error %d", ret);
584 ret = git_deflate_end_gently(&stream);
585 if (ret != Z_OK)
586 die("cannot deflate request; zlib end error %d", ret);
588 gzip_size = stream.total_out;
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);
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);
600 } else {
601 /* We know the complete request size in advance, use the
602 * more normal Content-Length approach.
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);
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);
617 err = run_slot(slot, NULL);
618 if (err == HTTP_REAUTH && !large_request) {
619 credential_fill(&http_auth);
620 goto retry;
622 if (err != HTTP_OK)
623 err = -1;
625 curl_slist_free_all(headers);
626 free(gzip_body);
627 return err;
630 static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
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;
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);
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);
655 strbuf_addf(&buf, "%s%s", url.buf, svc);
656 rpc->service_url = strbuf_detach(&buf, NULL);
658 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
659 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
661 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
662 rpc->hdr_accept = strbuf_detach(&buf, NULL);
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);
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;
684 close(client.out);
685 client.out = -1;
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;
696 static int fetch_dumb(int nr_heads, struct ref **to_fetch)
698 struct walker *walker;
699 char **targets = xmalloc(nr_heads * sizeof(char*));
700 int ret, i;
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));
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);
716 for (i = 0; i < nr_heads; i++)
717 free(targets[i]);
718 free(targets);
720 return ret ? error("fetch failed.") : 0;
723 static int fetch_git(struct discovery *heads,
724 int nr_heads, struct ref **to_fetch)
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];
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";
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;
758 argv[argc++] = url.buf;
759 argv[argc++] = NULL;
761 for (i = 0; i < nr_heads; i++) {
762 struct ref *ref = to_fetch[i];
763 if (!ref->name || !*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);
768 packet_buf_flush(&preamble);
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;
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;
785 static int fetch(int nr_heads, struct ref **to_fetch)
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);
794 static void parse_fetch(struct strbuf *buf)
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;
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];
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);
817 ref = alloc_ref(name);
818 hashcpy(ref->old_sha1, old_sha1);
820 *list = ref;
821 list = &ref->next;
823 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
824 to_fetch[nr_heads++] = ref;
826 else
827 die("http transport does not support %s", buf->buf);
829 strbuf_reset(buf);
830 if (strbuf_getline(buf, stdin, '\n') == EOF)
831 return;
832 if (!*buf->buf)
833 break;
834 } while (1);
836 if (fetch(nr_heads, to_fetch))
837 exit(128); /* error already reported */
838 free_refs(list_head);
839 free(to_fetch);
841 printf("\n");
842 fflush(stdout);
843 strbuf_reset(buf);
846 static int push_dav(int nr_spec, char **specs)
848 const char **argv = xmalloc((10 + nr_spec) * sizeof(char*));
849 int argc = 0, i;
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;
862 if (run_command_v_opt(argv, RUN_GIT_CMD))
863 die("git-%s failed", argv[0]);
864 free(argv);
865 return 0;
868 static int push_git(struct discovery *heads, int nr_spec, char **specs)
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;
876 argv_array_init(&args);
877 argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
878 NULL);
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)
885 argv_array_push(&args, "--signed");
886 if (options.verbosity == 0)
887 argv_array_push(&args, "--quiet");
888 else if (options.verbosity > 1)
889 argv_array_push(&args, "--verbose");
890 argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
891 for_each_string_list_item(cas_option, &cas_options)
892 argv_array_push(&args, cas_option->string);
893 argv_array_push(&args, url.buf);
895 argv_array_push(&args, "--stdin");
896 for (i = 0; i < nr_spec; i++)
897 packet_buf_write(&preamble, "%s\n", specs[i]);
898 packet_buf_flush(&preamble);
900 memset(&rpc, 0, sizeof(rpc));
901 rpc.service_name = "git-receive-pack",
902 rpc.argv = args.argv;
903 rpc.stdin_preamble = &preamble;
905 err = rpc_service(&rpc, heads);
906 if (rpc.result.len)
907 write_or_die(1, rpc.result.buf, rpc.result.len);
908 strbuf_release(&rpc.result);
909 strbuf_release(&preamble);
910 argv_array_clear(&args);
911 return err;
914 static int push(int nr_spec, char **specs)
916 struct discovery *heads = discover_refs("git-receive-pack", 1);
917 int ret;
919 if (heads->proto_git)
920 ret = push_git(heads, nr_spec, specs);
921 else
922 ret = push_dav(nr_spec, specs);
923 free_discovery(heads);
924 return ret;
927 static void parse_push(struct strbuf *buf)
929 char **specs = NULL;
930 int alloc_spec = 0, nr_spec = 0, i, ret;
932 do {
933 if (starts_with(buf->buf, "push ")) {
934 ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
935 specs[nr_spec++] = xstrdup(buf->buf + 5);
937 else
938 die("http transport does not support %s", buf->buf);
940 strbuf_reset(buf);
941 if (strbuf_getline(buf, stdin, '\n') == EOF)
942 goto free_specs;
943 if (!*buf->buf)
944 break;
945 } while (1);
947 ret = push(nr_spec, specs);
948 printf("\n");
949 fflush(stdout);
951 if (ret)
952 exit(128); /* error already reported */
954 free_specs:
955 for (i = 0; i < nr_spec; i++)
956 free(specs[i]);
957 free(specs);
960 int main(int argc, const char **argv)
962 struct strbuf buf = STRBUF_INIT;
963 int nongit;
965 git_extract_argv0_path(argv[0]);
966 setup_git_directory_gently(&nongit);
967 if (argc < 2) {
968 error("remote-curl: usage: git remote-curl <remote> [<url>]");
969 return 1;
972 options.verbosity = 1;
973 options.progress = !!isatty(2);
974 options.thin = 1;
976 remote = remote_get(argv[1]);
978 if (argc > 2) {
979 end_url_with_slash(&url, argv[2]);
980 } else {
981 end_url_with_slash(&url, remote->url[0]);
984 http_init(remote, url.buf, 0);
986 do {
987 const char *arg;
989 if (strbuf_getline(&buf, stdin, '\n') == EOF) {
990 if (ferror(stdin))
991 error("remote-curl: error reading command stream from git");
992 return 1;
994 if (buf.len == 0)
995 break;
996 if (starts_with(buf.buf, "fetch ")) {
997 if (nongit)
998 die("remote-curl: fetch attempted without a local repo");
999 parse_fetch(&buf);
1001 } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1002 int for_push = !!strstr(buf.buf + 4, "for-push");
1003 output_refs(get_refs(for_push));
1005 } else if (starts_with(buf.buf, "push ")) {
1006 parse_push(&buf);
1008 } else if (skip_prefix(buf.buf, "option ", &arg)) {
1009 char *value = strchr(arg, ' ');
1010 int result;
1012 if (value)
1013 *value++ = '\0';
1014 else
1015 value = "true";
1017 result = set_option(arg, value);
1018 if (!result)
1019 printf("ok\n");
1020 else if (result < 0)
1021 printf("error invalid value\n");
1022 else
1023 printf("unsupported\n");
1024 fflush(stdout);
1026 } else if (!strcmp(buf.buf, "capabilities")) {
1027 printf("fetch\n");
1028 printf("option\n");
1029 printf("push\n");
1030 printf("check-connectivity\n");
1031 printf("\n");
1032 fflush(stdout);
1033 } else {
1034 error("remote-curl: unknown command '%s' from git", buf.buf);
1035 return 1;
1037 strbuf_reset(&buf);
1038 } while (1);
1040 http_cleanup();
1042 return 0;