fetch-pack: new --stdin option to read refs from stdin
[git/git.git] / remote-curl.c
CommitLineData
a2d725b7
DB
1#include "cache.h"
2#include "remote.h"
3#include "strbuf.h"
4#include "walker.h"
5#include "http.h"
d01a8e32 6#include "exec_cmd.h"
ae4efe19 7#include "run-command.h"
97cc7bc4 8#include "pkt-line.h"
de1a2fdd 9#include "sideband.h"
a2d725b7 10
37a8768f 11static struct remote *remote;
d8fab072 12static const char *url; /* always ends with a trailing slash */
37a8768f 13
ef08ef9e
SP
14struct options {
15 int verbosity;
16 unsigned long depth;
17 unsigned progress : 1,
ae4efe19 18 followtags : 1,
de1a2fdd
SP
19 dry_run : 1,
20 thin : 1;
ef08ef9e
SP
21};
22static struct options options;
23
ef08ef9e
SP
24static 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;
249b2004 41 return 0;
ef08ef9e
SP
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;
249b2004 49 return 0;
ef08ef9e
SP
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;
249b2004 58 return 0;
ef08ef9e 59 }
ae4efe19
SP
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 }
ef08ef9e
SP
69 else {
70 return 1 /* unsupported */;
71 }
72}
73
97cc7bc4
SP
74struct discovery {
75 const char *service;
76 char *buf_alloc;
77 char *buf;
78 size_t len;
79 unsigned proto_git : 1;
80};
81static struct discovery *last_discovery;
82
83static 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
93static struct discovery* discover_refs(const char *service)
a2d725b7
DB
94{
95 struct strbuf buffer = STRBUF_INIT;
97cc7bc4 96 struct discovery *last = last_discovery;
a2d725b7 97 char *refs_url;
703e6e76 98 int http_ret, is_http = 0, proto_git_candidate = 1;
a2d725b7 99
97cc7bc4
SP
100 if (last && !strcmp(service, last->service))
101 return last;
102 free_discovery(last);
a2d725b7 103
d8fab072 104 strbuf_addf(&buffer, "%sinfo/refs", url);
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SP
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);
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DB
114
115 http_ret = http_get_strbuf(refs_url, &buffer, HTTP_NO_CACHE);
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TRC
116
117 /* try again with "plain" url (no ? or & appended) */
28d0c101 118 if (http_ret != HTTP_OK && http_ret != HTTP_NOAUTH) {
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TRC
119 free(refs_url);
120 strbuf_reset(&buffer);
121
122 proto_git_candidate = 0;
d8fab072 123 strbuf_addf(&buffer, "%sinfo/refs", url);
703e6e76
TRC
124 refs_url = strbuf_detach(&buffer, NULL);
125
126 http_ret = http_get_strbuf(refs_url, &buffer, HTTP_NO_CACHE);
127 }
128
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DB
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);
42653c09
SC
135 case HTTP_NOAUTH:
136 die("Authentication failed");
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DB
137 default:
138 http_error(refs_url, http_ret);
139 die("HTTP request failed");
140 }
141
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SP
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
703e6e76
TRC
147 if (is_http && proto_git_candidate
148 && 5 <= last->len && last->buf[4] == '#') {
97cc7bc4
SP
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
ae6a5609 181static int write_discovery(int in, int out, void *data)
97cc7bc4
SP
182{
183 struct discovery *heads = data;
184 int err = 0;
ae6a5609 185 if (write_in_full(out, heads->buf, heads->len) != heads->len)
97cc7bc4 186 err = 1;
ae6a5609 187 close(out);
97cc7bc4
SP
188 return err;
189}
190
02f79147 191static struct ref *parse_git_refs(struct discovery *heads, int for_push)
97cc7bc4
SP
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;
ae6a5609 199 async.out = -1;
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SP
200
201 if (start_async(&async))
202 die("cannot start thread to parse advertised refs");
200888ef 203 get_remote_heads(async.out, &list,
02f79147 204 for_push ? REF_NORMAL : 0, NULL);
97cc7bc4
SP
205 close(async.out);
206 if (finish_async(&async))
207 die("ref parsing thread failed");
208 return list;
209}
210
211static 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;
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DB
222 start = NULL;
223 mid = data;
97cc7bc4 224 while (i < heads->len) {
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DB
225 if (!start) {
226 start = &data[i];
227 }
228 if (data[i] == '\t')
229 mid = &data[i];
230 if (data[i] == '\n') {
6e8e67f3
JP
231 if (mid - start != 40)
232 die("%sinfo/refs not valid: is this a git repository?", url);
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DB
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
a2d725b7 250 ref = alloc_ref("HEAD");
aec49756 251 if (!http_fetch_ref(url, ref) &&
a2d725b7
DB
252 !resolve_remote_symref(ref, refs)) {
253 ref->next = refs;
254 refs = ref;
255 } else {
256 free(ref);
257 }
258
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DB
259 return refs;
260}
261
97cc7bc4
SP
262static 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)
02f79147 272 return parse_git_refs(heads, for_push);
97cc7bc4
SP
273 return parse_info_refs(heads);
274}
275
ae4efe19
SP
276static 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
de1a2fdd
SP
290struct rpc_state {
291 const char *service_name;
292 const char **argv;
293 char *service_url;
294 char *hdr_content_type;
295 char *hdr_accept;
296 char *buf;
297 size_t alloc;
298 size_t len;
299 size_t pos;
300 int in;
301 int out;
302 struct strbuf result;
b8538603 303 unsigned gzip_request : 1;
6c81a990 304 unsigned initial_buffer : 1;
de1a2fdd
SP
305};
306
307static size_t rpc_out(void *ptr, size_t eltsize,
308 size_t nmemb, void *buffer_)
309{
310 size_t max = eltsize * nmemb;
311 struct rpc_state *rpc = buffer_;
312 size_t avail = rpc->len - rpc->pos;
313
314 if (!avail) {
6c81a990 315 rpc->initial_buffer = 0;
de1a2fdd
SP
316 avail = packet_read_line(rpc->out, rpc->buf, rpc->alloc);
317 if (!avail)
318 return 0;
319 rpc->pos = 0;
320 rpc->len = avail;
321 }
322
48310608 323 if (max < avail)
de1a2fdd
SP
324 avail = max;
325 memcpy(ptr, rpc->buf + rpc->pos, avail);
326 rpc->pos += avail;
327 return avail;
328}
329
6c81a990 330#ifndef NO_CURL_IOCTL
5092d3ec 331static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
6c81a990
MS
332{
333 struct rpc_state *rpc = clientp;
334
335 switch (cmd) {
336 case CURLIOCMD_NOP:
337 return CURLIOE_OK;
338
339 case CURLIOCMD_RESTARTREAD:
340 if (rpc->initial_buffer) {
341 rpc->pos = 0;
342 return CURLIOE_OK;
343 }
344 fprintf(stderr, "Unable to rewind rpc post data - try increasing http.postBuffer\n");
345 return CURLIOE_FAILRESTART;
346
347 default:
348 return CURLIOE_UNKNOWNCMD;
349 }
350}
351#endif
352
a04ff3ec 353static size_t rpc_in(char *ptr, size_t eltsize,
de1a2fdd
SP
354 size_t nmemb, void *buffer_)
355{
356 size_t size = eltsize * nmemb;
357 struct rpc_state *rpc = buffer_;
358 write_or_die(rpc->in, ptr, size);
359 return size;
360}
361
206b099d
SP
362static int run_slot(struct active_request_slot *slot)
363{
364 int err = 0;
365 struct slot_results results;
366
367 slot->results = &results;
368 slot->curl_result = curl_easy_perform(slot->curl);
369 finish_active_slot(slot);
370
371 if (results.curl_result != CURLE_OK) {
372 err |= error("RPC failed; result=%d, HTTP code = %ld",
373 results.curl_result, results.http_code);
374 }
375
376 return err;
377}
378
379static int probe_rpc(struct rpc_state *rpc)
380{
381 struct active_request_slot *slot;
382 struct curl_slist *headers = NULL;
383 struct strbuf buf = STRBUF_INIT;
384 int err;
385
386 slot = get_active_slot();
387
388 headers = curl_slist_append(headers, rpc->hdr_content_type);
389 headers = curl_slist_append(headers, rpc->hdr_accept);
390
391 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
392 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
393 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
394 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
395 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
396 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
397 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
398 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
399 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
400
401 err = run_slot(slot);
402
403 curl_slist_free_all(headers);
404 strbuf_release(&buf);
405 return err;
406}
407
de1a2fdd
SP
408static int post_rpc(struct rpc_state *rpc)
409{
410 struct active_request_slot *slot;
de1a2fdd 411 struct curl_slist *headers = NULL;
b8538603
SP
412 int use_gzip = rpc->gzip_request;
413 char *gzip_body = NULL;
206b099d 414 int err, large_request = 0;
de1a2fdd
SP
415
416 /* Try to load the entire request, if we can fit it into the
417 * allocated buffer space we can use HTTP/1.0 and avoid the
418 * chunked encoding mess.
419 */
420 while (1) {
421 size_t left = rpc->alloc - rpc->len;
422 char *buf = rpc->buf + rpc->len;
423 int n;
424
425 if (left < LARGE_PACKET_MAX) {
426 large_request = 1;
b8538603 427 use_gzip = 0;
de1a2fdd
SP
428 break;
429 }
430
431 n = packet_read_line(rpc->out, buf, left);
432 if (!n)
433 break;
434 rpc->len += n;
435 }
436
206b099d
SP
437 if (large_request) {
438 err = probe_rpc(rpc);
439 if (err)
440 return err;
441 }
442
de1a2fdd 443 slot = get_active_slot();
de1a2fdd 444
de1a2fdd 445 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
d21f9794 446 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
de1a2fdd 447 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
b8538603 448 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "");
de1a2fdd
SP
449
450 headers = curl_slist_append(headers, rpc->hdr_content_type);
451 headers = curl_slist_append(headers, rpc->hdr_accept);
959dfcf4 452 headers = curl_slist_append(headers, "Expect:");
de1a2fdd
SP
453
454 if (large_request) {
455 /* The request body is large and the size cannot be predicted.
456 * We must use chunked encoding to send it.
457 */
de1a2fdd 458 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
6c81a990 459 rpc->initial_buffer = 1;
de1a2fdd
SP
460 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
461 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
6c81a990
MS
462#ifndef NO_CURL_IOCTL
463 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
464 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
465#endif
de1a2fdd
SP
466 if (options.verbosity > 1) {
467 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
468 fflush(stderr);
469 }
470
b8538603
SP
471 } else if (use_gzip && 1024 < rpc->len) {
472 /* The client backend isn't giving us compressed data so
473 * we can try to deflate it ourselves, this may save on.
474 * the transfer time.
475 */
476 size_t size;
ef49a7a0 477 git_zstream stream;
b8538603
SP
478 int ret;
479
480 memset(&stream, 0, sizeof(stream));
55bb5c91 481 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
225a6f10 482 size = git_deflate_bound(&stream, rpc->len);
b8538603
SP
483 gzip_body = xmalloc(size);
484
485 stream.next_in = (unsigned char *)rpc->buf;
486 stream.avail_in = rpc->len;
487 stream.next_out = (unsigned char *)gzip_body;
488 stream.avail_out = size;
489
55bb5c91 490 ret = git_deflate(&stream, Z_FINISH);
b8538603
SP
491 if (ret != Z_STREAM_END)
492 die("cannot deflate request; zlib deflate error %d", ret);
493
55bb5c91 494 ret = git_deflate_end_gently(&stream);
b8538603
SP
495 if (ret != Z_OK)
496 die("cannot deflate request; zlib end error %d", ret);
497
498 size = stream.total_out;
499
500 headers = curl_slist_append(headers, "Content-Encoding: gzip");
501 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
502 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, size);
503
504 if (options.verbosity > 1) {
505 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
506 rpc->service_name,
507 (unsigned long)rpc->len, (unsigned long)size);
508 fflush(stderr);
509 }
de1a2fdd
SP
510 } else {
511 /* We know the complete request size in advance, use the
512 * more normal Content-Length approach.
513 */
514 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
515 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, rpc->len);
516 if (options.verbosity > 1) {
517 fprintf(stderr, "POST %s (%lu bytes)\n",
518 rpc->service_name, (unsigned long)rpc->len);
519 fflush(stderr);
520 }
521 }
522
523 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
524 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
525 curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
526
206b099d 527 err = run_slot(slot);
de1a2fdd
SP
528
529 curl_slist_free_all(headers);
b8538603 530 free(gzip_body);
de1a2fdd
SP
531 return err;
532}
533
534static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
535{
536 const char *svc = rpc->service_name;
537 struct strbuf buf = STRBUF_INIT;
538 struct child_process client;
539 int err = 0;
540
de1a2fdd
SP
541 memset(&client, 0, sizeof(client));
542 client.in = -1;
543 client.out = -1;
544 client.git_cmd = 1;
545 client.argv = rpc->argv;
546 if (start_command(&client))
547 exit(1);
548 if (heads)
549 write_or_die(client.in, heads->buf, heads->len);
550
551 rpc->alloc = http_post_buffer;
552 rpc->buf = xmalloc(rpc->alloc);
553 rpc->in = client.in;
554 rpc->out = client.out;
555 strbuf_init(&rpc->result, 0);
556
d8fab072 557 strbuf_addf(&buf, "%s%s", url, svc);
de1a2fdd
SP
558 rpc->service_url = strbuf_detach(&buf, NULL);
559
560 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
561 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
562
8efa5f62 563 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
de1a2fdd
SP
564 rpc->hdr_accept = strbuf_detach(&buf, NULL);
565
566 while (!err) {
567 int n = packet_read_line(rpc->out, rpc->buf, rpc->alloc);
568 if (!n)
569 break;
570 rpc->pos = 0;
571 rpc->len = n;
572 err |= post_rpc(rpc);
573 }
de1a2fdd
SP
574
575 close(client.in);
de1a2fdd 576 client.in = -1;
6cdf0223
SP
577 if (!err) {
578 strbuf_read(&rpc->result, client.out, 0);
579 } else {
580 char buf[4096];
581 for (;;)
582 if (xread(client.out, buf, sizeof(buf)) <= 0)
583 break;
584 }
b4ee10f6
SP
585
586 close(client.out);
de1a2fdd
SP
587 client.out = -1;
588
589 err |= finish_command(&client);
590 free(rpc->service_url);
591 free(rpc->hdr_content_type);
592 free(rpc->hdr_accept);
593 free(rpc->buf);
594 strbuf_release(&buf);
595 return err;
596}
597
292ce46b
SP
598static int fetch_dumb(int nr_heads, struct ref **to_fetch)
599{
26e1e0b2 600 struct walker *walker;
292ce46b
SP
601 char **targets = xmalloc(nr_heads * sizeof(char*));
602 int ret, i;
603
249b2004
SP
604 if (options.depth)
605 die("dumb http transport does not support --depth");
292ce46b
SP
606 for (i = 0; i < nr_heads; i++)
607 targets[i] = xstrdup(sha1_to_hex(to_fetch[i]->old_sha1));
608
26e1e0b2 609 walker = get_http_walker(url);
292ce46b
SP
610 walker->get_all = 1;
611 walker->get_tree = 1;
612 walker->get_history = 1;
ef08ef9e 613 walker->get_verbosely = options.verbosity >= 3;
292ce46b
SP
614 walker->get_recover = 0;
615 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
26e1e0b2 616 walker_free(walker);
292ce46b
SP
617
618 for (i = 0; i < nr_heads; i++)
619 free(targets[i]);
620 free(targets);
621
622 return ret ? error("Fetch failed.") : 0;
623}
624
249b2004
SP
625static int fetch_git(struct discovery *heads,
626 int nr_heads, struct ref **to_fetch)
627{
628 struct rpc_state rpc;
629 char *depth_arg = NULL;
630 const char **argv;
631 int argc = 0, i, err;
632
633 argv = xmalloc((15 + nr_heads) * sizeof(char*));
634 argv[argc++] = "fetch-pack";
635 argv[argc++] = "--stateless-rpc";
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 for (i = 0; i < nr_heads; i++) {
655 struct ref *ref = to_fetch[i];
656 if (!ref->name || !*ref->name)
657 die("cannot fetch by sha1 over smart http");
658 argv[argc++] = ref->name;
659 }
660 argv[argc++] = NULL;
661
662 memset(&rpc, 0, sizeof(rpc));
663 rpc.service_name = "git-upload-pack",
664 rpc.argv = argv;
b8538603 665 rpc.gzip_request = 1;
249b2004
SP
666
667 err = rpc_service(&rpc, heads);
668 if (rpc.result.len)
669 safe_write(1, rpc.result.buf, rpc.result.len);
670 strbuf_release(&rpc.result);
671 free(argv);
672 free(depth_arg);
673 return err;
674}
675
676static int fetch(int nr_heads, struct ref **to_fetch)
677{
678 struct discovery *d = discover_refs("git-upload-pack");
679 if (d->proto_git)
680 return fetch_git(d, nr_heads, to_fetch);
681 else
682 return fetch_dumb(nr_heads, to_fetch);
683}
684
292ce46b
SP
685static void parse_fetch(struct strbuf *buf)
686{
687 struct ref **to_fetch = NULL;
688 struct ref *list_head = NULL;
689 struct ref **list = &list_head;
690 int alloc_heads = 0, nr_heads = 0;
691
692 do {
693 if (!prefixcmp(buf->buf, "fetch ")) {
694 char *p = buf->buf + strlen("fetch ");
695 char *name;
696 struct ref *ref;
697 unsigned char old_sha1[20];
698
699 if (strlen(p) < 40 || get_sha1_hex(p, old_sha1))
700 die("protocol error: expected sha/ref, got %s'", p);
701 if (p[40] == ' ')
702 name = p + 41;
703 else if (!p[40])
704 name = "";
705 else
706 die("protocol error: expected sha/ref, got %s'", p);
707
708 ref = alloc_ref(name);
709 hashcpy(ref->old_sha1, old_sha1);
710
711 *list = ref;
712 list = &ref->next;
713
714 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
715 to_fetch[nr_heads++] = ref;
716 }
717 else
718 die("http transport does not support %s", buf->buf);
719
720 strbuf_reset(buf);
721 if (strbuf_getline(buf, stdin, '\n') == EOF)
722 return;
723 if (!*buf->buf)
724 break;
725 } while (1);
726
249b2004 727 if (fetch(nr_heads, to_fetch))
292ce46b
SP
728 exit(128); /* error already reported */
729 free_refs(list_head);
730 free(to_fetch);
731
732 printf("\n");
733 fflush(stdout);
734 strbuf_reset(buf);
735}
736
ae4efe19
SP
737static int push_dav(int nr_spec, char **specs)
738{
739 const char **argv = xmalloc((10 + nr_spec) * sizeof(char*));
740 int argc = 0, i;
741
742 argv[argc++] = "http-push";
743 argv[argc++] = "--helper-status";
744 if (options.dry_run)
745 argv[argc++] = "--dry-run";
746 if (options.verbosity > 1)
747 argv[argc++] = "--verbose";
748 argv[argc++] = url;
749 for (i = 0; i < nr_spec; i++)
750 argv[argc++] = specs[i];
751 argv[argc++] = NULL;
752
753 if (run_command_v_opt(argv, RUN_GIT_CMD))
754 die("git-%s failed", argv[0]);
755 free(argv);
756 return 0;
757}
758
de1a2fdd
SP
759static int push_git(struct discovery *heads, int nr_spec, char **specs)
760{
761 struct rpc_state rpc;
762 const char **argv;
763 int argc = 0, i, err;
764
765 argv = xmalloc((10 + nr_spec) * sizeof(char*));
766 argv[argc++] = "send-pack";
767 argv[argc++] = "--stateless-rpc";
768 argv[argc++] = "--helper-status";
769 if (options.thin)
770 argv[argc++] = "--thin";
771 if (options.dry_run)
772 argv[argc++] = "--dry-run";
5a277f3f 773 if (options.verbosity > 1)
de1a2fdd
SP
774 argv[argc++] = "--verbose";
775 argv[argc++] = url;
776 for (i = 0; i < nr_spec; i++)
777 argv[argc++] = specs[i];
778 argv[argc++] = NULL;
779
780 memset(&rpc, 0, sizeof(rpc));
781 rpc.service_name = "git-receive-pack",
782 rpc.argv = argv;
783
784 err = rpc_service(&rpc, heads);
785 if (rpc.result.len)
786 safe_write(1, rpc.result.buf, rpc.result.len);
787 strbuf_release(&rpc.result);
788 free(argv);
789 return err;
790}
791
792static int push(int nr_spec, char **specs)
793{
794 struct discovery *heads = discover_refs("git-receive-pack");
795 int ret;
796
797 if (heads->proto_git)
798 ret = push_git(heads, nr_spec, specs);
799 else
800 ret = push_dav(nr_spec, specs);
801 free_discovery(heads);
802 return ret;
803}
804
ae4efe19
SP
805static void parse_push(struct strbuf *buf)
806{
807 char **specs = NULL;
808 int alloc_spec = 0, nr_spec = 0, i;
809
810 do {
811 if (!prefixcmp(buf->buf, "push ")) {
812 ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
813 specs[nr_spec++] = xstrdup(buf->buf + 5);
814 }
815 else
816 die("http transport does not support %s", buf->buf);
817
818 strbuf_reset(buf);
819 if (strbuf_getline(buf, stdin, '\n') == EOF)
dc4cd767 820 goto free_specs;
ae4efe19
SP
821 if (!*buf->buf)
822 break;
823 } while (1);
824
de1a2fdd 825 if (push(nr_spec, specs))
ae4efe19 826 exit(128); /* error already reported */
ae4efe19
SP
827
828 printf("\n");
829 fflush(stdout);
dc4cd767
JM
830
831 free_specs:
832 for (i = 0; i < nr_spec; i++)
833 free(specs[i]);
834 free(specs);
ae4efe19
SP
835}
836
a2d725b7
DB
837int main(int argc, const char **argv)
838{
a2d725b7 839 struct strbuf buf = STRBUF_INIT;
a45d3d7e 840 int nongit;
a2d725b7 841
c6dfb399 842 git_extract_argv0_path(argv[0]);
a45d3d7e 843 setup_git_directory_gently(&nongit);
a2d725b7
DB
844 if (argc < 2) {
845 fprintf(stderr, "Remote needed\n");
846 return 1;
847 }
848
ef08ef9e
SP
849 options.verbosity = 1;
850 options.progress = !!isatty(2);
de1a2fdd 851 options.thin = 1;
ef08ef9e 852
a2d725b7
DB
853 remote = remote_get(argv[1]);
854
855 if (argc > 2) {
d8fab072 856 end_url_with_slash(&buf, argv[2]);
a2d725b7 857 } else {
d8fab072 858 end_url_with_slash(&buf, remote->url[0]);
a2d725b7
DB
859 }
860
d8fab072
TRC
861 url = strbuf_detach(&buf, NULL);
862
a4ddbc33 863 http_init(remote, url, 0);
888692b7 864
a2d725b7 865 do {
1843f0ce
SR
866 if (strbuf_getline(&buf, stdin, '\n') == EOF) {
867 if (ferror(stdin))
868 fprintf(stderr, "Error reading command stream\n");
869 else
870 fprintf(stderr, "Unexpected end of command stream\n");
871 return 1;
872 }
873 if (buf.len == 0)
a2d725b7
DB
874 break;
875 if (!prefixcmp(buf.buf, "fetch ")) {
a45d3d7e
DB
876 if (nongit)
877 die("Fetch attempted without a local repo");
292ce46b
SP
878 parse_fetch(&buf);
879
ae4efe19 880 } else if (!strcmp(buf.buf, "list") || !prefixcmp(buf.buf, "list ")) {
97cc7bc4
SP
881 int for_push = !!strstr(buf.buf + 4, "for-push");
882 output_refs(get_refs(for_push));
ae4efe19
SP
883
884 } else if (!prefixcmp(buf.buf, "push ")) {
885 parse_push(&buf);
886
ef08ef9e
SP
887 } else if (!prefixcmp(buf.buf, "option ")) {
888 char *name = buf.buf + strlen("option ");
889 char *value = strchr(name, ' ');
890 int result;
891
892 if (value)
893 *value++ = '\0';
894 else
895 value = "true";
896
897 result = set_option(name, value);
898 if (!result)
899 printf("ok\n");
900 else if (result < 0)
901 printf("error invalid value\n");
902 else
903 printf("unsupported\n");
a2d725b7 904 fflush(stdout);
ef08ef9e 905
a2d725b7
DB
906 } else if (!strcmp(buf.buf, "capabilities")) {
907 printf("fetch\n");
ef08ef9e 908 printf("option\n");
ae4efe19 909 printf("push\n");
a2d725b7
DB
910 printf("\n");
911 fflush(stdout);
912 } else {
1843f0ce 913 fprintf(stderr, "Unknown command '%s'\n", buf.buf);
a2d725b7
DB
914 return 1;
915 }
916 strbuf_reset(&buf);
917 } while (1);
888692b7
TRC
918
919 http_cleanup();
920
a2d725b7
DB
921 return 0;
922}