6 #include "run-command.h"
11 #include "transport.h"
13 #include "sha1-array.h"
14 #include "gpg-interface.h"
16 static int feed_object(const unsigned char *sha1
, int fd
, int negative
)
20 if (negative
&& !has_sha1_file(sha1
))
23 memcpy(buf
+ negative
, sha1_to_hex(sha1
), 40);
26 buf
[40 + negative
] = '\n';
27 return write_or_whine(fd
, buf
, 41 + negative
, "send-pack: send refs");
31 * Make a pack stream and spit it out into file descriptor fd
33 static int pack_objects(int fd
, struct ref
*refs
, struct sha1_array
*extra
, struct send_pack_args
*args
)
36 * The child becomes pack-objects --revs; we feed
37 * the revision parameters to it via its stdin and
38 * let its stdout go back to the other end.
40 const char *argv
[] = {
42 "--all-progress-implied",
51 struct child_process po
= CHILD_PROCESS_INIT
;
55 if (args
->use_thin_pack
)
57 if (args
->use_ofs_delta
)
58 argv
[i
++] = "--delta-base-offset";
59 if (args
->quiet
|| !args
->progress
)
62 argv
[i
++] = "--progress";
65 po
.out
= args
->stateless_rpc
? -1 : fd
;
67 if (start_command(&po
))
68 die_errno("git pack-objects failed");
71 * We feed the pack-objects we just spawned with revision
72 * parameters by writing to the pipe.
74 for (i
= 0; i
< extra
->nr
; i
++)
75 if (!feed_object(extra
->sha1
[i
], po
.in
, 1))
79 if (!is_null_sha1(refs
->old_sha1
) &&
80 !feed_object(refs
->old_sha1
, po
.in
, 1))
82 if (!is_null_sha1(refs
->new_sha1
) &&
83 !feed_object(refs
->new_sha1
, po
.in
, 0))
90 if (args
->stateless_rpc
) {
91 char *buf
= xmalloc(LARGE_PACKET_MAX
);
93 ssize_t n
= xread(po
.out
, buf
, LARGE_PACKET_MAX
);
96 send_sideband(fd
, -1, buf
, n
, LARGE_PACKET_MAX
);
103 if (finish_command(&po
))
108 static int receive_status(int in
, struct ref
*refs
)
112 char *line
= packet_read_line(in
, NULL
);
113 if (!starts_with(line
, "unpack "))
114 return error("did not receive remote status");
115 if (strcmp(line
, "unpack ok")) {
116 error("unpack failed: %s", line
+ 7);
123 line
= packet_read_line(in
, NULL
);
126 if (!starts_with(line
, "ok ") && !starts_with(line
, "ng ")) {
127 error("invalid ref status from remote: %s", line
);
133 msg
= strchr(refname
, ' ');
137 /* first try searching at our hint, falling back to all refs */
139 hint
= find_ref_by_name(hint
, refname
);
141 hint
= find_ref_by_name(refs
, refname
);
143 warning("remote reported status on unknown ref: %s",
147 if (hint
->status
!= REF_STATUS_EXPECTING_REPORT
) {
148 warning("remote reported status on unexpected ref: %s",
153 if (line
[0] == 'o' && line
[1] == 'k')
154 hint
->status
= REF_STATUS_OK
;
156 hint
->status
= REF_STATUS_REMOTE_REJECT
;
160 hint
->remote_status
= xstrdup(msg
);
161 /* start our next search from the next ref */
167 static int sideband_demux(int in
, int out
, void *data
)
173 ret
= recv_sideband("send-pack", fd
[0], out
);
178 static int advertise_shallow_grafts_cb(const struct commit_graft
*graft
, void *cb
)
180 struct strbuf
*sb
= cb
;
181 if (graft
->nr_parent
== -1)
182 packet_buf_write(sb
, "shallow %s\n", sha1_to_hex(graft
->sha1
));
186 static void advertise_shallow_grafts_buf(struct strbuf
*sb
)
188 if (!is_repository_shallow())
190 for_each_commit_graft(advertise_shallow_grafts_cb
, sb
);
193 #define CHECK_REF_NO_PUSH -1
194 #define CHECK_REF_STATUS_REJECTED -2
195 #define CHECK_REF_UPTODATE -3
196 static int check_to_send_update(const struct ref
*ref
, const struct send_pack_args
*args
)
198 if (!ref
->peer_ref
&& !args
->send_mirror
)
199 return CHECK_REF_NO_PUSH
;
201 /* Check for statuses set by set_ref_status_for_push() */
202 switch (ref
->status
) {
203 case REF_STATUS_REJECT_NONFASTFORWARD
:
204 case REF_STATUS_REJECT_ALREADY_EXISTS
:
205 case REF_STATUS_REJECT_FETCH_FIRST
:
206 case REF_STATUS_REJECT_NEEDS_FORCE
:
207 case REF_STATUS_REJECT_STALE
:
208 case REF_STATUS_REJECT_NODELETE
:
209 return CHECK_REF_STATUS_REJECTED
;
210 case REF_STATUS_UPTODATE
:
211 return CHECK_REF_UPTODATE
;
218 * the beginning of the next line, or the end of buffer.
220 * NEEDSWORK: perhaps move this to git-compat-util.h or somewhere and
221 * convert many similar uses found by "git grep -A4 memchr".
223 static const char *next_line(const char *line
, size_t len
)
225 const char *nl
= memchr(line
, '\n', len
);
227 return line
+ len
; /* incomplete line */
231 static int generate_push_cert(struct strbuf
*req_buf
,
232 const struct ref
*remote_refs
,
233 struct send_pack_args
*args
,
234 const char *cap_string
,
235 const char *push_cert_nonce
)
237 const struct ref
*ref
;
238 char *signing_key
= xstrdup(get_signing_key());
240 struct strbuf cert
= STRBUF_INIT
;
243 strbuf_addf(&cert
, "certificate version 0.1\n");
244 strbuf_addf(&cert
, "pusher %s ", signing_key
);
246 strbuf_addch(&cert
, '\n');
247 if (args
->url
&& *args
->url
) {
248 char *anon_url
= transport_anonymize_url(args
->url
);
249 strbuf_addf(&cert
, "pushee %s\n", anon_url
);
252 if (push_cert_nonce
[0])
253 strbuf_addf(&cert
, "nonce %s\n", push_cert_nonce
);
254 strbuf_addstr(&cert
, "\n");
256 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
257 if (check_to_send_update(ref
, args
) < 0)
260 strbuf_addf(&cert
, "%s %s %s\n",
261 sha1_to_hex(ref
->old_sha1
),
262 sha1_to_hex(ref
->new_sha1
),
268 if (sign_buffer(&cert
, &cert
, signing_key
))
269 die(_("failed to sign the push certificate"));
271 packet_buf_write(req_buf
, "push-cert%c%s", 0, cap_string
);
272 for (cp
= cert
.buf
; cp
< cert
.buf
+ cert
.len
; cp
= np
) {
273 np
= next_line(cp
, cert
.buf
+ cert
.len
- cp
);
274 packet_buf_write(req_buf
,
275 "%.*s", (int)(np
- cp
), cp
);
277 packet_buf_write(req_buf
, "push-cert-end\n");
281 strbuf_release(&cert
);
286 static int atomic_push_failure(struct send_pack_args
*args
,
287 struct ref
*remote_refs
,
288 struct ref
*failing_ref
)
291 /* Mark other refs as failed */
292 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
293 if (!ref
->peer_ref
&& !args
->send_mirror
)
296 switch (ref
->status
) {
297 case REF_STATUS_EXPECTING_REPORT
:
298 ref
->status
= REF_STATUS_ATOMIC_PUSH_FAILED
;
301 break; /* do nothing */
304 return error("atomic push failed for ref %s. status: %d\n",
305 failing_ref
->name
, failing_ref
->status
);
308 int send_pack(struct send_pack_args
*args
,
309 int fd
[], struct child_process
*conn
,
310 struct ref
*remote_refs
,
311 struct sha1_array
*extra_have
)
315 struct strbuf req_buf
= STRBUF_INIT
;
316 struct strbuf cap_buf
= STRBUF_INIT
;
318 int need_pack_data
= 0;
319 int allow_deleting_refs
= 0;
320 int status_report
= 0;
321 int use_sideband
= 0;
322 int quiet_supported
= 0;
323 int agent_supported
= 0;
325 int atomic_supported
= 0;
326 unsigned cmds_sent
= 0;
329 const char *push_cert_nonce
= NULL
;
331 /* Does the other end support the reporting? */
332 if (server_supports("report-status"))
334 if (server_supports("delete-refs"))
335 allow_deleting_refs
= 1;
336 if (server_supports("ofs-delta"))
337 args
->use_ofs_delta
= 1;
338 if (server_supports("side-band-64k"))
340 if (server_supports("quiet"))
342 if (server_supports("agent"))
344 if (server_supports("no-thin"))
345 args
->use_thin_pack
= 0;
346 if (server_supports("atomic"))
347 atomic_supported
= 1;
348 if (args
->push_cert
) {
351 push_cert_nonce
= server_feature_value("push-cert", &len
);
352 if (!push_cert_nonce
)
353 die(_("the receiving end does not support --signed push"));
354 push_cert_nonce
= xmemdupz(push_cert_nonce
, len
);
358 fprintf(stderr
, "No refs in common and none specified; doing nothing.\n"
359 "Perhaps you should specify a branch such as 'master'.\n");
362 if (args
->atomic
&& !atomic_supported
)
363 die(_("server does not support --atomic push"));
365 use_atomic
= atomic_supported
&& args
->atomic
;
368 strbuf_addstr(&cap_buf
, " report-status");
370 strbuf_addstr(&cap_buf
, " side-band-64k");
371 if (quiet_supported
&& (args
->quiet
|| !args
->progress
))
372 strbuf_addstr(&cap_buf
, " quiet");
374 strbuf_addstr(&cap_buf
, " atomic");
376 strbuf_addf(&cap_buf
, " agent=%s", git_user_agent_sanitized());
379 * NEEDSWORK: why does delete-refs have to be so specific to
380 * send-pack machinery that set_ref_status_for_push() cannot
381 * set this bit for us???
383 for (ref
= remote_refs
; ref
; ref
= ref
->next
)
384 if (ref
->deletion
&& !allow_deleting_refs
)
385 ref
->status
= REF_STATUS_REJECT_NODELETE
;
388 advertise_shallow_grafts_buf(&req_buf
);
390 if (!args
->dry_run
&& args
->push_cert
)
391 cmds_sent
= generate_push_cert(&req_buf
, remote_refs
, args
,
392 cap_buf
.buf
, push_cert_nonce
);
395 * Clear the status for each ref and see if we need to send
398 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
399 switch (check_to_send_update(ref
, args
)) {
400 case 0: /* no error */
402 case CHECK_REF_STATUS_REJECTED
:
404 * When we know the server would reject a ref update if
405 * we were to send it and we're trying to send the refs
406 * atomically, abort the whole operation.
409 return atomic_push_failure(args
, remote_refs
, ref
);
410 /* Fallthrough for non atomic case. */
417 if (args
->dry_run
|| !status_report
)
418 ref
->status
= REF_STATUS_OK
;
420 ref
->status
= REF_STATUS_EXPECTING_REPORT
;
424 * Finally, tell the other end!
426 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
427 char *old_hex
, *new_hex
;
429 if (args
->dry_run
|| args
->push_cert
)
432 if (check_to_send_update(ref
, args
) < 0)
435 old_hex
= sha1_to_hex(ref
->old_sha1
);
436 new_hex
= sha1_to_hex(ref
->new_sha1
);
438 packet_buf_write(&req_buf
,
440 old_hex
, new_hex
, ref
->name
, 0,
444 packet_buf_write(&req_buf
, "%s %s %s",
445 old_hex
, new_hex
, ref
->name
);
449 if (args
->stateless_rpc
) {
450 if (!args
->dry_run
&& (cmds_sent
|| is_repository_shallow())) {
451 packet_buf_flush(&req_buf
);
452 send_sideband(out
, -1, req_buf
.buf
, req_buf
.len
, LARGE_PACKET_MAX
);
455 write_or_die(out
, req_buf
.buf
, req_buf
.len
);
458 strbuf_release(&req_buf
);
459 strbuf_release(&cap_buf
);
461 if (use_sideband
&& cmds_sent
) {
462 memset(&demux
, 0, sizeof(demux
));
463 demux
.proc
= sideband_demux
;
466 if (start_async(&demux
))
467 die("send-pack: unable to fork off sideband demultiplexer");
471 if (need_pack_data
&& cmds_sent
) {
472 if (pack_objects(out
, remote_refs
, extra_have
, args
) < 0) {
473 for (ref
= remote_refs
; ref
; ref
= ref
->next
)
474 ref
->status
= REF_STATUS_NONE
;
475 if (args
->stateless_rpc
)
477 if (git_connection_is_socket(conn
))
478 shutdown(fd
[0], SHUT_WR
);
480 finish_async(&demux
);
484 if (!args
->stateless_rpc
)
485 /* Closed by pack_objects() via start_command() */
488 if (args
->stateless_rpc
&& cmds_sent
)
491 if (status_report
&& cmds_sent
)
492 ret
= receive_status(in
, remote_refs
);
495 if (args
->stateless_rpc
)
498 if (use_sideband
&& cmds_sent
) {
499 if (finish_async(&demux
)) {
500 error("error in sideband demultiplexer");
512 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
513 switch (ref
->status
) {
514 case REF_STATUS_NONE
:
515 case REF_STATUS_UPTODATE
: