6 #include "run-command.h"
9 static const char send_pack_usage
[] =
10 "git-send-pack [--all] [--force] [--receive-pack=<git-receive-pack>] [--verbose] [--thin] [<host>:]<directory> [<ref>...]\n"
11 " --all and explicit <ref> specification are mutually exclusive.";
12 static const char *receivepack
= "git-receive-pack";
15 static int force_update
;
16 static int use_thin_pack
;
19 * Make a pack stream and spit it out into file descriptor fd
21 static int pack_objects(int fd
, struct ref
*refs
)
24 * The child becomes pack-objects --revs; we feed
25 * the revision parameters to it via its stdin and
26 * let its stdout go back to the other end.
28 const char *args
[] = {
36 struct child_process po
;
40 memset(&po
, 0, sizeof(po
));
45 if (start_command(&po
))
46 die("git-pack-objects failed (%s)", strerror(errno
));
49 * We feed the pack-objects we just spawned with revision
50 * parameters by writing to the pipe.
55 if (!is_null_sha1(refs
->old_sha1
) &&
56 has_sha1_file(refs
->old_sha1
)) {
57 memcpy(buf
+ 1, sha1_to_hex(refs
->old_sha1
), 40);
60 if (!write_or_whine(po
.in
, buf
, 42,
61 "send-pack: send refs"))
64 if (!is_null_sha1(refs
->new_sha1
)) {
65 memcpy(buf
, sha1_to_hex(refs
->new_sha1
), 40);
67 if (!write_or_whine(po
.in
, buf
, 41,
68 "send-pack: send refs"))
74 if (finish_command(&po
))
75 return error("pack-objects died with strange error");
79 static void unmark_and_free(struct commit_list
*list
, unsigned int mark
)
82 struct commit_list
*temp
= list
;
83 temp
->item
->object
.flags
&= ~mark
;
89 static int ref_newer(const unsigned char *new_sha1
,
90 const unsigned char *old_sha1
)
93 struct commit
*old
, *new;
94 struct commit_list
*list
, *used
;
97 /* Both new and old must be commit-ish and new is descendant of
98 * old. Otherwise we require --force.
100 o
= deref_tag(parse_object(old_sha1
), NULL
, 0);
101 if (!o
|| o
->type
!= OBJ_COMMIT
)
103 old
= (struct commit
*) o
;
105 o
= deref_tag(parse_object(new_sha1
), NULL
, 0);
106 if (!o
|| o
->type
!= OBJ_COMMIT
)
108 new = (struct commit
*) o
;
110 if (parse_commit(new) < 0)
114 commit_list_insert(new, &list
);
116 new = pop_most_recent_commit(&list
, 1);
117 commit_list_insert(new, &used
);
123 unmark_and_free(list
, 1);
124 unmark_and_free(used
, 1);
128 static struct ref
*local_refs
, **local_tail
;
129 static struct ref
*remote_refs
, **remote_tail
;
131 static int one_local_ref(const char *refname
, const unsigned char *sha1
, int flag
, void *cb_data
)
134 int len
= strlen(refname
) + 1;
135 ref
= xcalloc(1, sizeof(*ref
) + len
);
136 hashcpy(ref
->new_sha1
, sha1
);
137 memcpy(ref
->name
, refname
, len
);
139 local_tail
= &ref
->next
;
143 static void get_local_heads(void)
145 local_tail
= &local_refs
;
146 for_each_ref(one_local_ref
, NULL
);
149 static int receive_status(int in
)
153 int len
= packet_read_line(in
, line
, sizeof(line
));
154 if (len
< 10 || memcmp(line
, "unpack ", 7)) {
155 fprintf(stderr
, "did not receive status back\n");
158 if (memcmp(line
, "unpack ok\n", 10)) {
163 len
= packet_read_line(in
, line
, sizeof(line
));
167 (memcmp(line
, "ok", 2) && memcmp(line
, "ng", 2))) {
168 fprintf(stderr
, "protocol error: %s\n", line
);
172 if (!memcmp(line
, "ok", 2))
180 static int send_pack(int in
, int out
, struct remote
*remote
, int nr_refspec
, char **refspec
)
185 int ask_for_status_report
= 0;
186 int allow_deleting_refs
= 0;
187 int expect_status_report
= 0;
189 /* No funny business with the matcher */
190 remote_tail
= get_remote_heads(in
, &remote_refs
, 0, NULL
, REF_NORMAL
);
193 /* Does the other end support the reporting? */
194 if (server_supports("report-status"))
195 ask_for_status_report
= 1;
196 if (server_supports("delete-refs"))
197 allow_deleting_refs
= 1;
201 remote_tail
= &remote_refs
;
202 if (match_refs(local_refs
, remote_refs
, &remote_tail
,
203 nr_refspec
, refspec
, send_all
))
207 fprintf(stderr
, "No refs in common and none specified; doing nothing.\n");
212 * Finally, tell the other end!
215 for (ref
= remote_refs
; ref
; ref
= ref
->next
) {
216 char old_hex
[60], *new_hex
;
223 will_delete_ref
= is_null_sha1(ref
->peer_ref
->new_sha1
);
224 if (will_delete_ref
&& !allow_deleting_refs
) {
225 error("remote does not support deleting refs");
229 if (!will_delete_ref
&&
230 !hashcmp(ref
->old_sha1
, ref
->peer_ref
->new_sha1
)) {
232 fprintf(stderr
, "'%s': up-to-date\n", ref
->name
);
236 /* This part determines what can overwrite what.
239 * (0) you can always use --force or +A:B notation to
240 * selectively force individual ref pairs.
242 * (1) if the old thing does not exist, it is OK.
244 * (2) if you do not have the old thing, you are not allowed
245 * to overwrite it; you would not know what you are losing
248 * (3) if both new and old are commit-ish, and new is a
249 * descendant of old, it is OK.
251 * (4) regardless of all of the above, removing :B is
257 !is_null_sha1(ref
->old_sha1
) &&
259 if (!has_sha1_file(ref
->old_sha1
) ||
260 !ref_newer(ref
->peer_ref
->new_sha1
,
262 /* We do not have the remote ref, or
263 * we know that the remote ref is not
264 * an ancestor of what we are trying to
265 * push. Either way this can be losing
266 * commits at the remote end and likely
267 * we were not up to date to begin with.
269 error("remote '%s' is not a strict "
270 "subset of local ref '%s'. "
271 "maybe you are not up-to-date and "
272 "need to pull first?",
274 ref
->peer_ref
->name
);
279 hashcpy(ref
->new_sha1
, ref
->peer_ref
->new_sha1
);
280 if (!will_delete_ref
)
282 strcpy(old_hex
, sha1_to_hex(ref
->old_sha1
));
283 new_hex
= sha1_to_hex(ref
->new_sha1
);
285 if (ask_for_status_report
) {
286 packet_write(out
, "%s %s %s%c%s",
287 old_hex
, new_hex
, ref
->name
, 0,
289 ask_for_status_report
= 0;
290 expect_status_report
= 1;
293 packet_write(out
, "%s %s %s",
294 old_hex
, new_hex
, ref
->name
);
296 fprintf(stderr
, "deleting '%s'\n", ref
->name
);
298 fprintf(stderr
, "updating '%s'", ref
->name
);
299 if (strcmp(ref
->name
, ref
->peer_ref
->name
))
300 fprintf(stderr
, " using '%s'",
301 ref
->peer_ref
->name
);
302 fprintf(stderr
, "\n from %s\n to %s\n",
308 remote_find_tracking(remote
, &rs
);
310 struct ref_lock
*lock
;
311 fprintf(stderr
, " Also local %s\n", rs
.dst
);
312 if (will_delete_ref
) {
313 if (delete_ref(rs
.dst
, NULL
)) {
314 error("Failed to delete");
317 lock
= lock_any_ref_for_update(rs
.dst
, NULL
, 0);
319 error("Failed to lock");
321 write_ref_sha1(lock
, ref
->new_sha1
,
331 ret
= pack_objects(out
, remote_refs
);
334 if (expect_status_report
) {
335 if (receive_status(in
))
339 if (!new_refs
&& ret
== 0)
340 fprintf(stderr
, "Everything up-to-date\n");
344 static void verify_remote_names(int nr_heads
, char **heads
)
348 for (i
= 0; i
< nr_heads
; i
++) {
349 const char *remote
= strchr(heads
[i
], ':');
351 remote
= remote
? (remote
+ 1) : heads
[i
];
352 switch (check_ref_format(remote
)) {
354 case -2: /* ok but a single level -- that is fine for
359 die("remote part of refspec is not a valid name in %s",
364 int main(int argc
, char **argv
)
371 char *remote_name
= NULL
;
372 struct remote
*remote
= NULL
;
374 setup_git_directory();
375 git_config(git_default_config
);
378 for (i
= 1; i
< argc
; i
++, argv
++) {
382 if (!prefixcmp(arg
, "--receive-pack=")) {
383 receivepack
= arg
+ 15;
386 if (!prefixcmp(arg
, "--exec=")) {
387 receivepack
= arg
+ 7;
390 if (!prefixcmp(arg
, "--remote=")) {
391 remote_name
= arg
+ 9;
394 if (!strcmp(arg
, "--all")) {
398 if (!strcmp(arg
, "--force")) {
402 if (!strcmp(arg
, "--verbose")) {
406 if (!strcmp(arg
, "--thin")) {
410 usage(send_pack_usage
);
421 usage(send_pack_usage
);
422 if (heads
&& send_all
)
423 usage(send_pack_usage
);
424 verify_remote_names(nr_heads
, heads
);
427 remote
= remote_get(remote_name
);
428 if (!remote_has_uri(remote
, dest
)) {
429 die("Destination %s is not a uri for %s",
434 pid
= git_connect(fd
, dest
, receivepack
, verbose
? CONNECT_VERBOSE
: 0);
437 ret
= send_pack(fd
[0], fd
[1], remote
, nr_heads
, heads
);
440 ret
|= finish_connect(pid
);