builtin/push.c

   1 /*
   2  * "git push"
   3  */
   4 #include "cache.h"
   5 #include "refs.h"
   6 #include "run-command.h"
   7 #include "builtin.h"
   8 #include "remote.h"
   9 #include "transport.h"
  10 #include "parse-options.h"
  11 #include "submodule.h"
  12 #include "submodule-config.h"
  13 #include "send-pack.h"
  14
  15 static const char * const push_usage[] = {
  16         N_("git push [<options>] [<repository> [<refspec>...]]"),
  17         NULL,
  18 };
  19
  20 static int thin = 1;
  21 static int deleterefs;
  22 static const char *receivepack;
  23 static int verbosity;
  24 static int progress = -1;
  25 static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
  26 static enum transport_family family;
  27
  28 static struct push_cas_option cas;
  29
  30 static const char **refspec;
  31 static int refspec_nr;
  32 static int refspec_alloc;
  33
  34 static void add_refspec(const char *ref)
  35 {
  36         refspec_nr++;
  37         ALLOC_GROW(refspec, refspec_nr, refspec_alloc);
  38         refspec[refspec_nr-1] = ref;
  39 }
  40
  41 static const char *map_refspec(const char *ref,
  42                                struct remote *remote, struct ref *local_refs)
  43 {
  44         struct ref *matched = NULL;
  45
  46         /* Does "ref" uniquely name our ref? */
  47         if (count_refspec_match(ref, local_refs, &matched) != 1)
  48                 return ref;
  49
  50         if (remote->push) {
  51                 struct refspec query;
  52                 memset(&query, 0, sizeof(struct refspec));
  53                 query.src = matched->name;
  54                 if (!query_refspecs(remote->push, remote->push_refspec_nr, &query) &&
  55                     query.dst) {
  56                         struct strbuf buf = STRBUF_INIT;
  57                         strbuf_addf(&buf, "%s%s:%s",
  58                                     query.force ? "+" : "",
  59                                     query.src, query.dst);
  60                         return strbuf_detach(&buf, NULL);
  61                 }
  62         }
  63
  64         if (push_default == PUSH_DEFAULT_UPSTREAM &&
  65             starts_with(matched->name, "refs/heads/")) {
  66                 struct branch *branch = branch_get(matched->name + 11);
  67                 if (branch->merge_nr == 1 && branch->merge[0]->src) {
  68                         struct strbuf buf = STRBUF_INIT;
  69                         strbuf_addf(&buf, "%s:%s",
  70                                     ref, branch->merge[0]->src);
  71                         return strbuf_detach(&buf, NULL);
  72                 }
  73         }
  74
  75         return ref;
  76 }
  77
  78 static void set_refspecs(const char **refs, int nr, const char *repo)
  79 {
  80         struct remote *remote = NULL;
  81         struct ref *local_refs = NULL;
  82         int i;
  83
  84         for (i = 0; i < nr; i++) {
  85                 const char *ref = refs[i];
  86                 if (!strcmp("tag", ref)) {
  87                         struct strbuf tagref = STRBUF_INIT;
  88                         if (nr <= ++i)
  89                                 die(_("tag shorthand without <tag>"));
  90                         ref = refs[i];
  91                         if (deleterefs)
  92                                 strbuf_addf(&tagref, ":refs/tags/%s", ref);
  93                         else
  94                                 strbuf_addf(&tagref, "refs/tags/%s", ref);
  95                         ref = strbuf_detach(&tagref, NULL);
  96                 } else if (deleterefs) {
  97                         struct strbuf delref = STRBUF_INIT;
  98                         if (strchr(ref, ':'))
  99                                 die(_("--delete only accepts plain target ref names"));
 100                         strbuf_addf(&delref, ":%s", ref);
 101                         ref = strbuf_detach(&delref, NULL);
 102                 } else if (!strchr(ref, ':')) {
 103                         if (!remote) {
 104                                 /* lazily grab remote and local_refs */
 105                                 remote = remote_get(repo);
 106                                 local_refs = get_local_heads();
 107                         }
 108                         ref = map_refspec(ref, remote, local_refs);
 109                 }
 110                 add_refspec(ref);
 111         }
 112 }
 113
 114 static int push_url_of_remote(struct remote *remote, const char ***url_p)
 115 {
 116         if (remote->pushurl_nr) {
 117                 *url_p = remote->pushurl;
 118                 return remote->pushurl_nr;
 119         }
 120         *url_p = remote->url;
 121         return remote->url_nr;
 122 }
 123
 124 static NORETURN int die_push_simple(struct branch *branch, struct remote *remote) {
 125         /*
 126          * There's no point in using shorten_unambiguous_ref here,
 127          * as the ambiguity would be on the remote side, not what
 128          * we have locally. Plus, this is supposed to be the simple
 129          * mode. If the user is doing something crazy like setting
 130          * upstream to a non-branch, we should probably be showing
 131          * them the big ugly fully qualified ref.
 132          */
 133         const char *advice_maybe = "";
 134         const char *short_upstream = branch->merge[0]->src;
 135
 136         skip_prefix(short_upstream, "refs/heads/", &short_upstream);
 137
 138         /*
 139          * Don't show advice for people who explicitly set
 140          * push.default.
 141          */
 142         if (push_default == PUSH_DEFAULT_UNSPECIFIED)
 143                 advice_maybe = _("\n"
 144                                  "To choose either option permanently, "
 145                                  "see push.default in 'git help config'.");
 146         die(_("The upstream branch of your current branch does not match\n"
 147               "the name of your current branch.  To push to the upstream branch\n"
 148               "on the remote, use\n"
 149               "\n"
 150               "    git push %s HEAD:%s\n"
 151               "\n"
 152               "To push to the branch of the same name on the remote, use\n"
 153               "\n"
 154               "    git push %s %s\n"
 155               "%s"),
 156             remote->name, short_upstream,
 157             remote->name, branch->name, advice_maybe);
 158 }
 159
 160 static const char message_detached_head_die[] =
 161         N_("You are not currently on a branch.\n"
 162            "To push the history leading to the current (detached HEAD)\n"
 163            "state now, use\n"
 164            "\n"
 165            "    git push %s HEAD:<name-of-remote-branch>\n");
 166
 167 static void setup_push_upstream(struct remote *remote, struct branch *branch,
 168                                 int triangular, int simple)
 169 {
 170         struct strbuf refspec = STRBUF_INIT;
 171
 172         if (!branch)
 173                 die(_(message_detached_head_die), remote->name);
 174         if (!branch->merge_nr || !branch->merge || !branch->remote_name)
 175                 die(_("The current branch %s has no upstream branch.\n"
 176                     "To push the current branch and set the remote as upstream, use\n"
 177                     "\n"
 178                     "    git push --set-upstream %s %s\n"),
 179                     branch->name,
 180                     remote->name,
 181                     branch->name);
 182         if (branch->merge_nr != 1)
 183                 die(_("The current branch %s has multiple upstream branches, "
 184                     "refusing to push."), branch->name);
 185         if (triangular)
 186                 die(_("You are pushing to remote '%s', which is not the upstream of\n"
 187                       "your current branch '%s', without telling me what to push\n"
 188                       "to update which remote branch."),
 189                     remote->name, branch->name);
 190
 191         if (simple) {
 192                 /* Additional safety */
 193                 if (strcmp(branch->refname, branch->merge[0]->src))
 194                         die_push_simple(branch, remote);
 195         }
 196
 197         strbuf_addf(&refspec, "%s:%s", branch->name, branch->merge[0]->src);
 198         add_refspec(refspec.buf);
 199 }
 200
 201 static void setup_push_current(struct remote *remote, struct branch *branch)
 202 {
 203         if (!branch)
 204                 die(_(message_detached_head_die), remote->name);
 205         add_refspec(branch->name);
 206 }
 207
 208 static int is_workflow_triangular(struct remote *remote)
 209 {
 210         struct remote *fetch_remote = remote_get(NULL);
 211         return (fetch_remote && fetch_remote != remote);
 212 }
 213
 214 static void setup_default_push_refspecs(struct remote *remote)
 215 {
 216         struct branch *branch = branch_get(NULL);
 217         int triangular = is_workflow_triangular(remote);
 218
 219         switch (push_default) {
 220         default:
 221         case PUSH_DEFAULT_MATCHING:
 222                 add_refspec(":");
 223                 break;
 224
 225         case PUSH_DEFAULT_UNSPECIFIED:
 226         case PUSH_DEFAULT_SIMPLE:
 227                 if (triangular)
 228                         setup_push_current(remote, branch);
 229                 else
 230                         setup_push_upstream(remote, branch, triangular, 1);
 231                 break;
 232
 233         case PUSH_DEFAULT_UPSTREAM:
 234                 setup_push_upstream(remote, branch, triangular, 0);
 235                 break;
 236
 237         case PUSH_DEFAULT_CURRENT:
 238                 setup_push_current(remote, branch);
 239                 break;
 240
 241         case PUSH_DEFAULT_NOTHING:
 242                 die(_("You didn't specify any refspecs to push, and "
 243                     "push.default is \"nothing\"."));
 244                 break;
 245         }
 246 }
 247
 248 static const char message_advice_pull_before_push[] =
 249         N_("Updates were rejected because the tip of your current branch is behind\n"
 250            "its remote counterpart. Integrate the remote changes (e.g.\n"
 251            "'git pull ...') before pushing again.\n"
 252            "See the 'Note about fast-forwards' in 'git push --help' for details.");
 253
 254 static const char message_advice_checkout_pull_push[] =
 255         N_("Updates were rejected because a pushed branch tip is behind its remote\n"
 256            "counterpart. Check out this branch and integrate the remote changes\n"
 257            "(e.g. 'git pull ...') before pushing again.\n"
 258            "See the 'Note about fast-forwards' in 'git push --help' for details.");
 259
 260 static const char message_advice_ref_fetch_first[] =
 261         N_("Updates were rejected because the remote contains work that you do\n"
 262            "not have locally. This is usually caused by another repository pushing\n"
 263            "to the same ref. You may want to first integrate the remote changes\n"
 264            "(e.g., 'git pull ...') before pushing again.\n"
 265            "See the 'Note about fast-forwards' in 'git push --help' for details.");
 266
 267 static const char message_advice_ref_already_exists[] =
 268         N_("Updates were rejected because the tag already exists in the remote.");
 269
 270 static const char message_advice_ref_needs_force[] =
 271         N_("You cannot update a remote ref that points at a non-commit object,\n"
 272            "or update a remote ref to make it point at a non-commit object,\n"
 273            "without using the '--force' option.\n");
 274
 275 static void advise_pull_before_push(void)
 276 {
 277         if (!advice_push_non_ff_current || !advice_push_update_rejected)
 278                 return;
 279         advise(_(message_advice_pull_before_push));
 280 }
 281
 282 static void advise_checkout_pull_push(void)
 283 {
 284         if (!advice_push_non_ff_matching || !advice_push_update_rejected)
 285                 return;
 286         advise(_(message_advice_checkout_pull_push));
 287 }
 288
 289 static void advise_ref_already_exists(void)
 290 {
 291         if (!advice_push_already_exists || !advice_push_update_rejected)
 292                 return;
 293         advise(_(message_advice_ref_already_exists));
 294 }
 295
 296 static void advise_ref_fetch_first(void)
 297 {
 298         if (!advice_push_fetch_first || !advice_push_update_rejected)
 299                 return;
 300         advise(_(message_advice_ref_fetch_first));
 301 }
 302
 303 static void advise_ref_needs_force(void)
 304 {
 305         if (!advice_push_needs_force || !advice_push_update_rejected)
 306                 return;
 307         advise(_(message_advice_ref_needs_force));
 308 }
 309
 310 static int push_with_options(struct transport *transport, int flags)
 311 {
 312         int err;
 313         unsigned int reject_reasons;
 314
 315         transport_set_verbosity(transport, verbosity, progress);
 316         transport->family = family;
 317
 318         if (receivepack)
 319                 transport_set_option(transport,
 320                                      TRANS_OPT_RECEIVEPACK, receivepack);
 321         transport_set_option(transport, TRANS_OPT_THIN, thin ? "yes" : NULL);
 322
 323         if (!is_empty_cas(&cas)) {
 324                 if (!transport->smart_options)
 325                         die("underlying transport does not support --%s option",
 326                             CAS_OPT_NAME);
 327                 transport->smart_options->cas = &cas;
 328         }
 329
 330         if (verbosity > 0)
 331                 fprintf(stderr, _("Pushing to %s\n"), transport->url);
 332         err = transport_push(transport, refspec_nr, refspec, flags,
 333                              &reject_reasons);
 334         if (err != 0)
 335                 error(_("failed to push some refs to '%s'"), transport->url);
 336
 337         err |= transport_disconnect(transport);
 338         if (!err)
 339                 return 0;
 340
 341         if (reject_reasons & REJECT_NON_FF_HEAD) {
 342                 advise_pull_before_push();
 343         } else if (reject_reasons & REJECT_NON_FF_OTHER) {
 344                 advise_checkout_pull_push();
 345         } else if (reject_reasons & REJECT_ALREADY_EXISTS) {
 346                 advise_ref_already_exists();
 347         } else if (reject_reasons & REJECT_FETCH_FIRST) {
 348                 advise_ref_fetch_first();
 349         } else if (reject_reasons & REJECT_NEEDS_FORCE) {
 350                 advise_ref_needs_force();
 351         }
 352
 353         return 1;
 354 }
 355
 356 static int do_push(const char *repo, int flags)
 357 {
 358         int i, errs;
 359         struct remote *remote = pushremote_get(repo);
 360         const char **url;
 361         int url_nr;
 362
 363         if (!remote) {
 364                 if (repo)
 365                         die(_("bad repository '%s'"), repo);
 366                 die(_("No configured push destination.\n"
 367                     "Either specify the URL from the command-line or configure a remote repository using\n"
 368                     "\n"
 369                     "    git remote add <name> <url>\n"
 370                     "\n"
 371                     "and then push using the remote name\n"
 372                     "\n"
 373                     "    git push <name>\n"));
 374         }
 375
 376         if (remote->mirror)
 377                 flags |= (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE);
 378
 379         if ((flags & TRANSPORT_PUSH_ALL) && refspec) {
 380                 if (!strcmp(*refspec, "refs/tags/*"))
 381                         return error(_("--all and --tags are incompatible"));
 382                 return error(_("--all can't be combined with refspecs"));
 383         }
 384
 385         if ((flags & TRANSPORT_PUSH_MIRROR) && refspec) {
 386                 if (!strcmp(*refspec, "refs/tags/*"))
 387                         return error(_("--mirror and --tags are incompatible"));
 388                 return error(_("--mirror can't be combined with refspecs"));
 389         }
 390
 391         if ((flags & (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) ==
 392                                 (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) {
 393                 return error(_("--all and --mirror are incompatible"));
 394         }
 395
 396         if (!refspec && !(flags & TRANSPORT_PUSH_ALL)) {
 397                 if (remote->push_refspec_nr) {
 398                         refspec = remote->push_refspec;
 399                         refspec_nr = remote->push_refspec_nr;
 400                 } else if (!(flags & TRANSPORT_PUSH_MIRROR))
 401                         setup_default_push_refspecs(remote);
 402         }
 403         errs = 0;
 404         url_nr = push_url_of_remote(remote, &url);
 405         if (url_nr) {
 406                 for (i = 0; i < url_nr; i++) {
 407                         struct transport *transport =
 408                                 transport_get(remote, url[i]);
 409                         if (push_with_options(transport, flags))
 410                                 errs++;
 411                 }
 412         } else {
 413                 struct transport *transport =
 414                         transport_get(remote, NULL);
 415
 416                 if (push_with_options(transport, flags))
 417                         errs++;
 418         }
 419         return !!errs;
 420 }
 421
 422 static int option_parse_recurse_submodules(const struct option *opt,
 423                                    const char *arg, int unset)
 424 {
 425         int *recurse_submodules = opt->value;
 426
 427         if (unset)
 428                 *recurse_submodules = RECURSE_SUBMODULES_OFF;
 429         else if (arg)
 430                 *recurse_submodules = parse_push_recurse_submodules_arg(opt->long_name, arg);
 431         else
 432                 die("%s missing parameter", opt->long_name);
 433
 434         return 0;
 435 }
 436
 437 static void set_push_cert_flags(int *flags, int v)
 438 {
 439         switch (v) {
 440         case SEND_PACK_PUSH_CERT_NEVER:
 441                 *flags &= ~(TRANSPORT_PUSH_CERT_ALWAYS | TRANSPORT_PUSH_CERT_IF_ASKED);
 442                 break;
 443         case SEND_PACK_PUSH_CERT_ALWAYS:
 444                 *flags |= TRANSPORT_PUSH_CERT_ALWAYS;
 445                 *flags &= ~TRANSPORT_PUSH_CERT_IF_ASKED;
 446                 break;
 447         case SEND_PACK_PUSH_CERT_IF_ASKED:
 448                 *flags |= TRANSPORT_PUSH_CERT_IF_ASKED;
 449                 *flags &= ~TRANSPORT_PUSH_CERT_ALWAYS;
 450                 break;
 451         }
 452 }
 453
 454
 455 static int git_push_config(const char *k, const char *v, void *cb)
 456 {
 457         int *flags = cb;
 458         int status;
 459
 460         status = git_gpg_config(k, v, NULL);
 461         if (status)
 462                 return status;
 463
 464         if (!strcmp(k, "push.followtags")) {
 465                 if (git_config_bool(k, v))
 466                         *flags |= TRANSPORT_PUSH_FOLLOW_TAGS;
 467                 else
 468                         *flags &= ~TRANSPORT_PUSH_FOLLOW_TAGS;
 469                 return 0;
 470         } else if (!strcmp(k, "push.gpgsign")) {
 471                 const char *value;
 472                 if (!git_config_get_value("push.gpgsign", &value)) {
 473                         switch (git_config_maybe_bool("push.gpgsign", value)) {
 474                         case 0:
 475                                 set_push_cert_flags(flags, SEND_PACK_PUSH_CERT_NEVER);
 476                                 break;
 477                         case 1:
 478                                 set_push_cert_flags(flags, SEND_PACK_PUSH_CERT_ALWAYS);
 479                                 break;
 480                         default:
 481                                 if (value && !strcasecmp(value, "if-asked"))
 482                                         set_push_cert_flags(flags, SEND_PACK_PUSH_CERT_IF_ASKED);
 483                                 else
 484                                         return error("Invalid value for '%s'", k);
 485                         }
 486                 }
 487         } else if (!strcmp(k, "push.recursesubmodules")) {
 488                 const char *value;
 489                 if (!git_config_get_value("push.recursesubmodules", &value))
 490                         recurse_submodules = parse_push_recurse_submodules_arg(k, value);
 491         }
 492
 493         return git_default_config(k, v, NULL);
 494 }
 495
 496 int cmd_push(int argc, const char **argv, const char *prefix)
 497 {
 498         int flags = 0;
 499         int tags = 0;
 500         int push_cert = -1;
 501         int rc;
 502         const char *repo = NULL;        /* default repository */
 503         struct option options[] = {
 504                 OPT__VERBOSITY(&verbosity),
 505                 OPT_STRING( 0 , "repo", &repo, N_("repository"), N_("repository")),
 506                 OPT_BIT( 0 , "all", &flags, N_("push all refs"), TRANSPORT_PUSH_ALL),
 507                 OPT_BIT( 0 , "mirror", &flags, N_("mirror all refs"),
 508                             (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE)),
 509                 OPT_BOOL('d', "delete", &deleterefs, N_("delete refs")),
 510                 OPT_BOOL( 0 , "tags", &tags, N_("push tags (can't be used with --all or --mirror)")),
 511                 OPT_BIT('n' , "dry-run", &flags, N_("dry run"), TRANSPORT_PUSH_DRY_RUN),
 512                 OPT_BIT( 0,  "porcelain", &flags, N_("machine-readable output"), TRANSPORT_PUSH_PORCELAIN),
 513                 OPT_BIT('f', "force", &flags, N_("force updates"), TRANSPORT_PUSH_FORCE),
 514                 { OPTION_CALLBACK,
 515                   0, CAS_OPT_NAME, &cas, N_("refname>:<expect"),
 516                   N_("require old value of ref to be at this value"),
 517                   PARSE_OPT_OPTARG, parseopt_push_cas_option },
 518                 { OPTION_CALLBACK, 0, "recurse-submodules", &recurse_submodules, "check|on-demand|no",
 519                         N_("control recursive pushing of submodules"),
 520                         PARSE_OPT_OPTARG, option_parse_recurse_submodules },
 521                 OPT_BOOL( 0 , "thin", &thin, N_("use thin pack")),
 522                 OPT_STRING( 0 , "receive-pack", &receivepack, "receive-pack", N_("receive pack program")),
 523                 OPT_STRING( 0 , "exec", &receivepack, "receive-pack", N_("receive pack program")),
 524                 OPT_BIT('u', "set-upstream", &flags, N_("set upstream for git pull/status"),
 525                         TRANSPORT_PUSH_SET_UPSTREAM),
 526                 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
 527                 OPT_BIT(0, "prune", &flags, N_("prune locally removed refs"),
 528                         TRANSPORT_PUSH_PRUNE),
 529                 OPT_BIT(0, "no-verify", &flags, N_("bypass pre-push hook"), TRANSPORT_PUSH_NO_HOOK),
 530                 OPT_BIT(0, "follow-tags", &flags, N_("push missing but relevant tags"),
 531                         TRANSPORT_PUSH_FOLLOW_TAGS),
 532                 { OPTION_CALLBACK,
 533                   0, "signed", &push_cert, "yes|no|if-asked", N_("GPG sign the push"),
 534                   PARSE_OPT_OPTARG, option_parse_push_signed },
 535                 OPT_BIT(0, "atomic", &flags, N_("request atomic transaction on remote side"), TRANSPORT_PUSH_ATOMIC),
 536                 OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
 537                                 TRANSPORT_FAMILY_IPV4),
 538                 OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
 539                                 TRANSPORT_FAMILY_IPV6),
 540                 OPT_END()
 541         };
 542
 543         packet_trace_identity("push");
 544         git_config(git_push_config, &flags);
 545         argc = parse_options(argc, argv, prefix, options, push_usage, 0);
 546         set_push_cert_flags(&flags, push_cert);
 547
 548         if (deleterefs && (tags || (flags & (TRANSPORT_PUSH_ALL | TRANSPORT_PUSH_MIRROR))))
 549                 die(_("--delete is incompatible with --all, --mirror and --tags"));
 550         if (deleterefs && argc < 2)
 551                 die(_("--delete doesn't make sense without any refs"));
 552
 553         if (recurse_submodules == RECURSE_SUBMODULES_CHECK)
 554                 flags |= TRANSPORT_RECURSE_SUBMODULES_CHECK;
 555         else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
 556                 flags |= TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND;
 557
 558         if (tags)
 559                 add_refspec("refs/tags/*");
 560
 561         if (argc > 0) {
 562                 repo = argv[0];
 563                 set_refspecs(argv + 1, argc - 1, repo);
 564         }
 565
 566         rc = do_push(repo, flags);
 567         if (rc == -1)
 568                 usage_with_options(push_usage, options);
 569         else
 570                 return rc;
 571 }