Merge branch 'en/rebase-against-rebase-fix'
[git] / builtin / send-pack.c
1 #include "cache.h"
2 #include "commit.h"
3 #include "refs.h"
4 #include "pkt-line.h"
5 #include "sideband.h"
6 #include "run-command.h"
7 #include "remote.h"
8 #include "send-pack.h"
9 #include "quote.h"
10 #include "transport.h"
11
12 static const char send_pack_usage[] =
13 "git send-pack [--all | --mirror] [--dry-run] [--force] [--receive-pack=<git-receive-pack>] [--verbose] [--thin] [<host>:]<directory> [<ref>...]\n"
14 "  --all and explicit <ref> specification are mutually exclusive.";
15
16 static struct send_pack_args args;
17
18 static int feed_object(const unsigned char *sha1, int fd, int negative)
19 {
20         char buf[42];
21
22         if (negative && !has_sha1_file(sha1))
23                 return 1;
24
25         memcpy(buf + negative, sha1_to_hex(sha1), 40);
26         if (negative)
27                 buf[0] = '^';
28         buf[40 + negative] = '\n';
29         return write_or_whine(fd, buf, 41 + negative, "send-pack: send refs");
30 }
31
32 /*
33  * Make a pack stream and spit it out into file descriptor fd
34  */
35 static int pack_objects(int fd, struct ref *refs, struct extra_have_objects *extra, struct send_pack_args *args)
36 {
37         /*
38          * The child becomes pack-objects --revs; we feed
39          * the revision parameters to it via its stdin and
40          * let its stdout go back to the other end.
41          */
42         const char *argv[] = {
43                 "pack-objects",
44                 "--all-progress-implied",
45                 "--revs",
46                 "--stdout",
47                 NULL,
48                 NULL,
49                 NULL,
50                 NULL,
51         };
52         struct child_process po;
53         int i;
54
55         i = 4;
56         if (args->use_thin_pack)
57                 argv[i++] = "--thin";
58         if (args->use_ofs_delta)
59                 argv[i++] = "--delta-base-offset";
60         if (args->quiet)
61                 argv[i++] = "-q";
62         memset(&po, 0, sizeof(po));
63         po.argv = argv;
64         po.in = -1;
65         po.out = args->stateless_rpc ? -1 : fd;
66         po.git_cmd = 1;
67         if (start_command(&po))
68                 die_errno("git pack-objects failed");
69
70         /*
71          * We feed the pack-objects we just spawned with revision
72          * parameters by writing to the pipe.
73          */
74         for (i = 0; i < extra->nr; i++)
75                 if (!feed_object(extra->array[i], po.in, 1))
76                         break;
77
78         while (refs) {
79                 if (!is_null_sha1(refs->old_sha1) &&
80                     !feed_object(refs->old_sha1, po.in, 1))
81                         break;
82                 if (!is_null_sha1(refs->new_sha1) &&
83                     !feed_object(refs->new_sha1, po.in, 0))
84                         break;
85                 refs = refs->next;
86         }
87
88         close(po.in);
89
90         if (args->stateless_rpc) {
91                 char *buf = xmalloc(LARGE_PACKET_MAX);
92                 while (1) {
93                         ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
94                         if (n <= 0)
95                                 break;
96                         send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
97                 }
98                 free(buf);
99                 close(po.out);
100                 po.out = -1;
101         }
102
103         if (finish_command(&po))
104                 return error("pack-objects died with strange error");
105         return 0;
106 }
107
108 static int receive_status(int in, struct ref *refs)
109 {
110         struct ref *hint;
111         char line[1000];
112         int ret = 0;
113         int len = packet_read_line(in, line, sizeof(line));
114         if (len < 10 || memcmp(line, "unpack ", 7))
115                 return error("did not receive remote status");
116         if (memcmp(line, "unpack ok\n", 10)) {
117                 char *p = line + strlen(line) - 1;
118                 if (*p == '\n')
119                         *p = '\0';
120                 error("unpack failed: %s", line + 7);
121                 ret = -1;
122         }
123         hint = NULL;
124         while (1) {
125                 char *refname;
126                 char *msg;
127                 len = packet_read_line(in, line, sizeof(line));
128                 if (!len)
129                         break;
130                 if (len < 3 ||
131                     (memcmp(line, "ok ", 3) && memcmp(line, "ng ", 3))) {
132                         fprintf(stderr, "protocol error: %s\n", line);
133                         ret = -1;
134                         break;
135                 }
136
137                 line[strlen(line)-1] = '\0';
138                 refname = line + 3;
139                 msg = strchr(refname, ' ');
140                 if (msg)
141                         *msg++ = '\0';
142
143                 /* first try searching at our hint, falling back to all refs */
144                 if (hint)
145                         hint = find_ref_by_name(hint, refname);
146                 if (!hint)
147                         hint = find_ref_by_name(refs, refname);
148                 if (!hint) {
149                         warning("remote reported status on unknown ref: %s",
150                                         refname);
151                         continue;
152                 }
153                 if (hint->status != REF_STATUS_EXPECTING_REPORT) {
154                         warning("remote reported status on unexpected ref: %s",
155                                         refname);
156                         continue;
157                 }
158
159                 if (line[0] == 'o' && line[1] == 'k')
160                         hint->status = REF_STATUS_OK;
161                 else {
162                         hint->status = REF_STATUS_REMOTE_REJECT;
163                         ret = -1;
164                 }
165                 if (msg)
166                         hint->remote_status = xstrdup(msg);
167                 /* start our next search from the next ref */
168                 hint = hint->next;
169         }
170         return ret;
171 }
172
173 static void print_helper_status(struct ref *ref)
174 {
175         struct strbuf buf = STRBUF_INIT;
176
177         for (; ref; ref = ref->next) {
178                 const char *msg = NULL;
179                 const char *res;
180
181                 switch(ref->status) {
182                 case REF_STATUS_NONE:
183                         res = "error";
184                         msg = "no match";
185                         break;
186
187                 case REF_STATUS_OK:
188                         res = "ok";
189                         break;
190
191                 case REF_STATUS_UPTODATE:
192                         res = "ok";
193                         msg = "up to date";
194                         break;
195
196                 case REF_STATUS_REJECT_NONFASTFORWARD:
197                         res = "error";
198                         msg = "non-fast forward";
199                         break;
200
201                 case REF_STATUS_REJECT_NODELETE:
202                 case REF_STATUS_REMOTE_REJECT:
203                         res = "error";
204                         break;
205
206                 case REF_STATUS_EXPECTING_REPORT:
207                 default:
208                         continue;
209                 }
210
211                 strbuf_reset(&buf);
212                 strbuf_addf(&buf, "%s %s", res, ref->name);
213                 if (ref->remote_status)
214                         msg = ref->remote_status;
215                 if (msg) {
216                         strbuf_addch(&buf, ' ');
217                         quote_two_c_style(&buf, "", msg, 0);
218                 }
219                 strbuf_addch(&buf, '\n');
220
221                 safe_write(1, buf.buf, buf.len);
222         }
223         strbuf_release(&buf);
224 }
225
226 static int sideband_demux(int in, int out, void *data)
227 {
228         int *fd = data;
229         int ret = recv_sideband("send-pack", fd[0], out);
230         close(out);
231         return ret;
232 }
233
234 int send_pack(struct send_pack_args *args,
235               int fd[], struct child_process *conn,
236               struct ref *remote_refs,
237               struct extra_have_objects *extra_have)
238 {
239         int in = fd[0];
240         int out = fd[1];
241         struct strbuf req_buf = STRBUF_INIT;
242         struct ref *ref;
243         int new_refs;
244         int allow_deleting_refs = 0;
245         int status_report = 0;
246         int use_sideband = 0;
247         unsigned cmds_sent = 0;
248         int ret;
249         struct async demux;
250
251         /* Does the other end support the reporting? */
252         if (server_supports("report-status"))
253                 status_report = 1;
254         if (server_supports("delete-refs"))
255                 allow_deleting_refs = 1;
256         if (server_supports("ofs-delta"))
257                 args->use_ofs_delta = 1;
258         if (server_supports("side-band-64k"))
259                 use_sideband = 1;
260
261         if (!remote_refs) {
262                 fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
263                         "Perhaps you should specify a branch such as 'master'.\n");
264                 return 0;
265         }
266
267         /*
268          * Finally, tell the other end!
269          */
270         new_refs = 0;
271         for (ref = remote_refs; ref; ref = ref->next) {
272                 if (!ref->peer_ref && !args->send_mirror)
273                         continue;
274
275                 /* Check for statuses set by set_ref_status_for_push() */
276                 switch (ref->status) {
277                 case REF_STATUS_REJECT_NONFASTFORWARD:
278                 case REF_STATUS_UPTODATE:
279                         continue;
280                 default:
281                         ; /* do nothing */
282                 }
283
284                 if (ref->deletion && !allow_deleting_refs) {
285                         ref->status = REF_STATUS_REJECT_NODELETE;
286                         continue;
287                 }
288
289                 if (!ref->deletion)
290                         new_refs++;
291
292                 if (args->dry_run) {
293                         ref->status = REF_STATUS_OK;
294                 } else {
295                         char *old_hex = sha1_to_hex(ref->old_sha1);
296                         char *new_hex = sha1_to_hex(ref->new_sha1);
297
298                         if (!cmds_sent && (status_report || use_sideband)) {
299                                 packet_buf_write(&req_buf, "%s %s %s%c%s%s",
300                                         old_hex, new_hex, ref->name, 0,
301                                         status_report ? " report-status" : "",
302                                         use_sideband ? " side-band-64k" : "");
303                         }
304                         else
305                                 packet_buf_write(&req_buf, "%s %s %s",
306                                         old_hex, new_hex, ref->name);
307                         ref->status = status_report ?
308                                 REF_STATUS_EXPECTING_REPORT :
309                                 REF_STATUS_OK;
310                         cmds_sent++;
311                 }
312         }
313
314         if (args->stateless_rpc) {
315                 if (!args->dry_run && cmds_sent) {
316                         packet_buf_flush(&req_buf);
317                         send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
318                 }
319         } else {
320                 safe_write(out, req_buf.buf, req_buf.len);
321                 packet_flush(out);
322         }
323         strbuf_release(&req_buf);
324
325         if (use_sideband && cmds_sent) {
326                 memset(&demux, 0, sizeof(demux));
327                 demux.proc = sideband_demux;
328                 demux.data = fd;
329                 demux.out = -1;
330                 if (start_async(&demux))
331                         die("receive-pack: unable to fork off sideband demultiplexer");
332                 in = demux.out;
333         }
334
335         if (new_refs && cmds_sent) {
336                 if (pack_objects(out, remote_refs, extra_have, args) < 0) {
337                         for (ref = remote_refs; ref; ref = ref->next)
338                                 ref->status = REF_STATUS_NONE;
339                         if (use_sideband)
340                                 finish_async(&demux);
341                         return -1;
342                 }
343         }
344         if (args->stateless_rpc && cmds_sent)
345                 packet_flush(out);
346
347         if (status_report && cmds_sent)
348                 ret = receive_status(in, remote_refs);
349         else
350                 ret = 0;
351         if (args->stateless_rpc)
352                 packet_flush(out);
353
354         if (use_sideband && cmds_sent) {
355                 if (finish_async(&demux)) {
356                         error("error in sideband demultiplexer");
357                         ret = -1;
358                 }
359                 close(demux.out);
360         }
361
362         if (ret < 0)
363                 return ret;
364
365         if (args->porcelain)
366                 return 0;
367
368         for (ref = remote_refs; ref; ref = ref->next) {
369                 switch (ref->status) {
370                 case REF_STATUS_NONE:
371                 case REF_STATUS_UPTODATE:
372                 case REF_STATUS_OK:
373                         break;
374                 default:
375                         return -1;
376                 }
377         }
378         return 0;
379 }
380
381 int cmd_send_pack(int argc, const char **argv, const char *prefix)
382 {
383         int i, nr_refspecs = 0;
384         const char **refspecs = NULL;
385         const char *remote_name = NULL;
386         struct remote *remote = NULL;
387         const char *dest = NULL;
388         int fd[2];
389         struct child_process *conn;
390         struct extra_have_objects extra_have;
391         struct ref *remote_refs, *local_refs;
392         int ret;
393         int helper_status = 0;
394         int send_all = 0;
395         const char *receivepack = "git-receive-pack";
396         int flags;
397         int nonfastforward = 0;
398
399         argv++;
400         for (i = 1; i < argc; i++, argv++) {
401                 const char *arg = *argv;
402
403                 if (*arg == '-') {
404                         if (!prefixcmp(arg, "--receive-pack=")) {
405                                 receivepack = arg + 15;
406                                 continue;
407                         }
408                         if (!prefixcmp(arg, "--exec=")) {
409                                 receivepack = arg + 7;
410                                 continue;
411                         }
412                         if (!prefixcmp(arg, "--remote=")) {
413                                 remote_name = arg + 9;
414                                 continue;
415                         }
416                         if (!strcmp(arg, "--all")) {
417                                 send_all = 1;
418                                 continue;
419                         }
420                         if (!strcmp(arg, "--dry-run")) {
421                                 args.dry_run = 1;
422                                 continue;
423                         }
424                         if (!strcmp(arg, "--mirror")) {
425                                 args.send_mirror = 1;
426                                 continue;
427                         }
428                         if (!strcmp(arg, "--force")) {
429                                 args.force_update = 1;
430                                 continue;
431                         }
432                         if (!strcmp(arg, "--verbose")) {
433                                 args.verbose = 1;
434                                 continue;
435                         }
436                         if (!strcmp(arg, "--thin")) {
437                                 args.use_thin_pack = 1;
438                                 continue;
439                         }
440                         if (!strcmp(arg, "--stateless-rpc")) {
441                                 args.stateless_rpc = 1;
442                                 continue;
443                         }
444                         if (!strcmp(arg, "--helper-status")) {
445                                 helper_status = 1;
446                                 continue;
447                         }
448                         usage(send_pack_usage);
449                 }
450                 if (!dest) {
451                         dest = arg;
452                         continue;
453                 }
454                 refspecs = (const char **) argv;
455                 nr_refspecs = argc - i;
456                 break;
457         }
458         if (!dest)
459                 usage(send_pack_usage);
460         /*
461          * --all and --mirror are incompatible; neither makes sense
462          * with any refspecs.
463          */
464         if ((refspecs && (send_all || args.send_mirror)) ||
465             (send_all && args.send_mirror))
466                 usage(send_pack_usage);
467
468         if (remote_name) {
469                 remote = remote_get(remote_name);
470                 if (!remote_has_url(remote, dest)) {
471                         die("Destination %s is not a uri for %s",
472                             dest, remote_name);
473                 }
474         }
475
476         if (args.stateless_rpc) {
477                 conn = NULL;
478                 fd[0] = 0;
479                 fd[1] = 1;
480         } else {
481                 conn = git_connect(fd, dest, receivepack,
482                         args.verbose ? CONNECT_VERBOSE : 0);
483         }
484
485         memset(&extra_have, 0, sizeof(extra_have));
486
487         get_remote_heads(fd[0], &remote_refs, 0, NULL, REF_NORMAL,
488                          &extra_have);
489
490         transport_verify_remote_names(nr_refspecs, refspecs);
491
492         local_refs = get_local_heads();
493
494         flags = MATCH_REFS_NONE;
495
496         if (send_all)
497                 flags |= MATCH_REFS_ALL;
498         if (args.send_mirror)
499                 flags |= MATCH_REFS_MIRROR;
500
501         /* match them up */
502         if (match_refs(local_refs, &remote_refs, nr_refspecs, refspecs, flags))
503                 return -1;
504
505         set_ref_status_for_push(remote_refs, args.send_mirror,
506                 args.force_update);
507
508         ret = send_pack(&args, fd, conn, remote_refs, &extra_have);
509
510         if (helper_status)
511                 print_helper_status(remote_refs);
512
513         close(fd[1]);
514         close(fd[0]);
515
516         ret |= finish_connect(conn);
517
518         if (!helper_status)
519                 transport_print_push_status(dest, remote_refs, args.verbose, 0, &nonfastforward);
520
521         if (!args.dry_run && remote) {
522                 struct ref *ref;
523                 for (ref = remote_refs; ref; ref = ref->next)
524                         transport_update_tracking_ref(remote, ref, args.verbose);
525         }
526
527         if (!ret && !transport_refs_pushed(remote_refs))
528                 fprintf(stderr, "Everything up-to-date\n");
529
530         return ret;
531 }