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
  13 static const char * const push_usage[] = {
  14         N_("git push [<options>] [<repository> [<refspec>...]]"),
  15         NULL,
  16 };
  17
  18 static int thin;
  19 static int deleterefs;
  20 static const char *receivepack;
  21 static int verbosity;
  22 static int progress = -1;
  23
  24 static const char **refspec;
  25 static int refspec_nr;
  26 static int refspec_alloc;
  27 static int default_matching_used;
  28
  29 static void add_refspec(const char *ref)
  30 {
  31         refspec_nr++;
  32         ALLOC_GROW(refspec, refspec_nr, refspec_alloc);
  33         refspec[refspec_nr-1] = ref;
  34 }
  35
  36 static void set_refspecs(const char **refs, int nr)
  37 {
  38         int i;
  39         for (i = 0; i < nr; i++) {
  40                 const char *ref = refs[i];
  41                 if (!strcmp("tag", ref)) {
  42                         char *tag;
  43                         int len;
  44                         if (nr <= ++i)
  45                                 die(_("tag shorthand without <tag>"));
  46                         len = strlen(refs[i]) + 11;
  47                         if (deleterefs) {
  48                                 tag = xmalloc(len+1);
  49                                 strcpy(tag, ":refs/tags/");
  50                         } else {
  51                                 tag = xmalloc(len);
  52                                 strcpy(tag, "refs/tags/");
  53                         }
  54                         strcat(tag, refs[i]);
  55                         ref = tag;
  56                 } else if (deleterefs && !strchr(ref, ':')) {
  57                         char *delref;
  58                         int len = strlen(ref)+1;
  59                         delref = xmalloc(len+1);
  60                         strcpy(delref, ":");
  61                         strcat(delref, ref);
  62                         ref = delref;
  63                 } else if (deleterefs)
  64                         die(_("--delete only accepts plain target ref names"));
  65                 add_refspec(ref);
  66         }
  67 }
  68
  69 static int push_url_of_remote(struct remote *remote, const char ***url_p)
  70 {
  71         if (remote->pushurl_nr) {
  72                 *url_p = remote->pushurl;
  73                 return remote->pushurl_nr;
  74         }
  75         *url_p = remote->url;
  76         return remote->url_nr;
  77 }
  78
  79 static NORETURN int die_push_simple(struct branch *branch, struct remote *remote) {
  80         /*
  81          * There's no point in using shorten_unambiguous_ref here,
  82          * as the ambiguity would be on the remote side, not what
  83          * we have locally. Plus, this is supposed to be the simple
  84          * mode. If the user is doing something crazy like setting
  85          * upstream to a non-branch, we should probably be showing
  86          * them the big ugly fully qualified ref.
  87          */
  88         const char *advice_maybe = "";
  89         const char *short_upstream =
  90                 skip_prefix(branch->merge[0]->src, "refs/heads/");
  91
  92         if (!short_upstream)
  93                 short_upstream = branch->merge[0]->src;
  94         /*
  95          * Don't show advice for people who explicitely set
  96          * push.default.
  97          */
  98         if (push_default == PUSH_DEFAULT_UNSPECIFIED)
  99                 advice_maybe = _("\n"
 100                                  "To choose either option permanently, "
 101                                  "see push.default in 'git help config'.");
 102         die(_("The upstream branch of your current branch does not match\n"
 103               "the name of your current branch.  To push to the upstream branch\n"
 104               "on the remote, use\n"
 105               "\n"
 106               "    git push %s HEAD:%s\n"
 107               "\n"
 108               "To push to the branch of the same name on the remote, use\n"
 109               "\n"
 110               "    git push %s %s\n"
 111               "%s"),
 112             remote->name, short_upstream,
 113             remote->name, branch->name, advice_maybe);
 114 }
 115
 116 static const char message_detached_head_die[] =
 117         N_("You are not currently on a branch.\n"
 118            "To push the history leading to the current (detached HEAD)\n"
 119            "state now, use\n"
 120            "\n"
 121            "    git push %s HEAD:<name-of-remote-branch>\n");
 122
 123 static void setup_push_upstream(struct remote *remote, struct branch *branch,
 124                                 int triangular)
 125 {
 126         struct strbuf refspec = STRBUF_INIT;
 127
 128         if (!branch)
 129                 die(_(message_detached_head_die), remote->name);
 130         if (!branch->merge_nr || !branch->merge || !branch->remote_name)
 131                 die(_("The current branch %s has no upstream branch.\n"
 132                     "To push the current branch and set the remote as upstream, use\n"
 133                     "\n"
 134                     "    git push --set-upstream %s %s\n"),
 135                     branch->name,
 136                     remote->name,
 137                     branch->name);
 138         if (branch->merge_nr != 1)
 139                 die(_("The current branch %s has multiple upstream branches, "
 140                     "refusing to push."), branch->name);
 141         if (triangular)
 142                 die(_("You are pushing to remote '%s', which is not the upstream of\n"
 143                       "your current branch '%s', without telling me what to push\n"
 144                       "to update which remote branch."),
 145                     remote->name, branch->name);
 146
 147         if (push_default == PUSH_DEFAULT_SIMPLE) {
 148                 /* Additional safety */
 149                 if (strcmp(branch->refname, branch->merge[0]->src))
 150                         die_push_simple(branch, remote);
 151         }
 152
 153         strbuf_addf(&refspec, "%s:%s", branch->name, branch->merge[0]->src);
 154         add_refspec(refspec.buf);
 155 }
 156
 157 static void setup_push_current(struct remote *remote, struct branch *branch)
 158 {
 159         if (!branch)
 160                 die(_(message_detached_head_die), remote->name);
 161         add_refspec(branch->name);
 162 }
 163
 164 static char warn_unspecified_push_default_msg[] =
 165 N_("push.default is unset; its implicit value is changing in\n"
 166    "Git 2.0 from 'matching' to 'simple'. To squelch this message\n"
 167    "and maintain the current behavior after the default changes, use:\n"
 168    "\n"
 169    "  git config --global push.default matching\n"
 170    "\n"
 171    "To squelch this message and adopt the new behavior now, use:\n"
 172    "\n"
 173    "  git config --global push.default simple\n"
 174    "\n"
 175    "See 'git help config' and search for 'push.default' for further information.\n"
 176    "(the 'simple' mode was introduced in Git 1.7.11. Use the similar mode\n"
 177    "'current' instead of 'simple' if you sometimes use older versions of Git)");
 178
 179 static void warn_unspecified_push_default_configuration(void)
 180 {
 181         static int warn_once;
 182
 183         if (warn_once++)
 184                 return;
 185         warning("%s\n", _(warn_unspecified_push_default_msg));
 186 }
 187
 188 static int is_workflow_triangular(struct remote *remote)
 189 {
 190         struct remote *fetch_remote = remote_get(NULL);
 191         return (fetch_remote && fetch_remote != remote);
 192 }
 193
 194 static void setup_default_push_refspecs(struct remote *remote)
 195 {
 196         struct branch *branch = branch_get(NULL);
 197         int triangular = is_workflow_triangular(remote);
 198
 199         switch (push_default) {
 200         default:
 201         case PUSH_DEFAULT_UNSPECIFIED:
 202                 default_matching_used = 1;
 203                 warn_unspecified_push_default_configuration();
 204                 /* fallthru */
 205         case PUSH_DEFAULT_MATCHING:
 206                 add_refspec(":");
 207                 break;
 208
 209         case PUSH_DEFAULT_SIMPLE:
 210                 if (triangular)
 211                         setup_push_current(remote, branch);
 212                 else
 213                         setup_push_upstream(remote, branch, triangular);
 214                 break;
 215
 216         case PUSH_DEFAULT_UPSTREAM:
 217                 setup_push_upstream(remote, branch, triangular);
 218                 break;
 219
 220         case PUSH_DEFAULT_CURRENT:
 221                 setup_push_current(remote, branch);
 222                 break;
 223
 224         case PUSH_DEFAULT_NOTHING:
 225                 die(_("You didn't specify any refspecs to push, and "
 226                     "push.default is \"nothing\"."));
 227                 break;
 228         }
 229 }
 230
 231 static const char message_advice_pull_before_push[] =
 232         N_("Updates were rejected because the tip of your current branch is behind\n"
 233            "its remote counterpart. Merge the remote changes (e.g. 'git pull')\n"
 234            "before pushing again.\n"
 235            "See the 'Note about fast-forwards' in 'git push --help' for details.");
 236
 237 static const char message_advice_use_upstream[] =
 238         N_("Updates were rejected because a pushed branch tip is behind its remote\n"
 239            "counterpart. If you did not intend to push that branch, you may want to\n"
 240            "specify branches to push or set the 'push.default' configuration variable\n"
 241            "to 'simple', 'current' or 'upstream' to push only the current branch.");
 242
 243 static const char message_advice_checkout_pull_push[] =
 244         N_("Updates were rejected because a pushed branch tip is behind its remote\n"
 245            "counterpart. Check out this branch and merge the remote changes\n"
 246            "(e.g. 'git pull') before pushing again.\n"
 247            "See the 'Note about fast-forwards' in 'git push --help' for details.");
 248
 249 static const char message_advice_ref_fetch_first[] =
 250         N_("Updates were rejected because the remote contains work that you do\n"
 251            "not have locally. This is usually caused by another repository pushing\n"
 252            "to the same ref. You may want to first merge the remote changes (e.g.,\n"
 253            "'git pull') before pushing again.\n"
 254            "See the 'Note about fast-forwards' in 'git push --help' for details.");
 255
 256 static const char message_advice_ref_already_exists[] =
 257         N_("Updates were rejected because the tag already exists in the remote.");
 258
 259 static const char message_advice_ref_needs_force[] =
 260         N_("You cannot update a remote ref that points at a non-commit object,\n"
 261            "or update a remote ref to make it point at a non-commit object,\n"
 262            "without using the '--force' option.\n");
 263
 264 static void advise_pull_before_push(void)
 265 {
 266         if (!advice_push_non_ff_current || !advice_push_update_rejected)
 267                 return;
 268         advise(_(message_advice_pull_before_push));
 269 }
 270
 271 static void advise_use_upstream(void)
 272 {
 273         if (!advice_push_non_ff_default || !advice_push_update_rejected)
 274                 return;
 275         advise(_(message_advice_use_upstream));
 276 }
 277
 278 static void advise_checkout_pull_push(void)
 279 {
 280         if (!advice_push_non_ff_matching || !advice_push_update_rejected)
 281                 return;
 282         advise(_(message_advice_checkout_pull_push));
 283 }
 284
 285 static void advise_ref_already_exists(void)
 286 {
 287         if (!advice_push_already_exists || !advice_push_update_rejected)
 288                 return;
 289         advise(_(message_advice_ref_already_exists));
 290 }
 291
 292 static void advise_ref_fetch_first(void)
 293 {
 294         if (!advice_push_fetch_first || !advice_push_update_rejected)
 295                 return;
 296         advise(_(message_advice_ref_fetch_first));
 297 }
 298
 299 static void advise_ref_needs_force(void)
 300 {
 301         if (!advice_push_needs_force || !advice_push_update_rejected)
 302                 return;
 303         advise(_(message_advice_ref_needs_force));
 304 }
 305
 306 static int push_with_options(struct transport *transport, int flags)
 307 {
 308         int err;
 309         unsigned int reject_reasons;
 310
 311         transport_set_verbosity(transport, verbosity, progress);
 312
 313         if (receivepack)
 314                 transport_set_option(transport,
 315                                      TRANS_OPT_RECEIVEPACK, receivepack);
 316         if (thin)
 317                 transport_set_option(transport, TRANS_OPT_THIN, "yes");
 318
 319         if (verbosity > 0)
 320                 fprintf(stderr, _("Pushing to %s\n"), transport->url);
 321         err = transport_push(transport, refspec_nr, refspec, flags,
 322                              &reject_reasons);
 323         if (err != 0)
 324                 error(_("failed to push some refs to '%s'"), transport->url);
 325
 326         err |= transport_disconnect(transport);
 327         if (!err)
 328                 return 0;
 329
 330         if (reject_reasons & REJECT_NON_FF_HEAD) {
 331                 advise_pull_before_push();
 332         } else if (reject_reasons & REJECT_NON_FF_OTHER) {
 333                 if (default_matching_used)
 334                         advise_use_upstream();
 335                 else
 336                         advise_checkout_pull_push();
 337         } else if (reject_reasons & REJECT_ALREADY_EXISTS) {
 338                 advise_ref_already_exists();
 339         } else if (reject_reasons & REJECT_FETCH_FIRST) {
 340                 advise_ref_fetch_first();
 341         } else if (reject_reasons & REJECT_NEEDS_FORCE) {
 342                 advise_ref_needs_force();
 343         }
 344
 345         return 1;
 346 }
 347
 348 static int do_push(const char *repo, int flags)
 349 {
 350         int i, errs;
 351         struct remote *remote = pushremote_get(repo);
 352         const char **url;
 353         int url_nr;
 354
 355         if (!remote) {
 356                 if (repo)
 357                         die(_("bad repository '%s'"), repo);
 358                 die(_("No configured push destination.\n"
 359                     "Either specify the URL from the command-line or configure a remote repository using\n"
 360                     "\n"
 361                     "    git remote add <name> <url>\n"
 362                     "\n"
 363                     "and then push using the remote name\n"
 364                     "\n"
 365                     "    git push <name>\n"));
 366         }
 367
 368         if (remote->mirror)
 369                 flags |= (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE);
 370
 371         if ((flags & TRANSPORT_PUSH_ALL) && refspec) {
 372                 if (!strcmp(*refspec, "refs/tags/*"))
 373                         return error(_("--all and --tags are incompatible"));
 374                 return error(_("--all can't be combined with refspecs"));
 375         }
 376
 377         if ((flags & TRANSPORT_PUSH_MIRROR) && refspec) {
 378                 if (!strcmp(*refspec, "refs/tags/*"))
 379                         return error(_("--mirror and --tags are incompatible"));
 380                 return error(_("--mirror can't be combined with refspecs"));
 381         }
 382
 383         if ((flags & (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) ==
 384                                 (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) {
 385                 return error(_("--all and --mirror are incompatible"));
 386         }
 387
 388         if (!refspec && !(flags & TRANSPORT_PUSH_ALL)) {
 389                 if (remote->push_refspec_nr) {
 390                         refspec = remote->push_refspec;
 391                         refspec_nr = remote->push_refspec_nr;
 392                 } else if (!(flags & TRANSPORT_PUSH_MIRROR))
 393                         setup_default_push_refspecs(remote);
 394         }
 395         errs = 0;
 396         url_nr = push_url_of_remote(remote, &url);
 397         if (url_nr) {
 398                 for (i = 0; i < url_nr; i++) {
 399                         struct transport *transport =
 400                                 transport_get(remote, url[i]);
 401                         if (push_with_options(transport, flags))
 402                                 errs++;
 403                 }
 404         } else {
 405                 struct transport *transport =
 406                         transport_get(remote, NULL);
 407
 408                 if (push_with_options(transport, flags))
 409                         errs++;
 410         }
 411         return !!errs;
 412 }
 413
 414 static int option_parse_recurse_submodules(const struct option *opt,
 415                                    const char *arg, int unset)
 416 {
 417         int *flags = opt->value;
 418
 419         if (*flags & (TRANSPORT_RECURSE_SUBMODULES_CHECK |
 420                       TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND))
 421                 die("%s can only be used once.", opt->long_name);
 422
 423         if (arg) {
 424                 if (!strcmp(arg, "check"))
 425                         *flags |= TRANSPORT_RECURSE_SUBMODULES_CHECK;
 426                 else if (!strcmp(arg, "on-demand"))
 427                         *flags |= TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND;
 428                 else
 429                         die("bad %s argument: %s", opt->long_name, arg);
 430         } else
 431                 die("option %s needs an argument (check|on-demand)",
 432                                 opt->long_name);
 433
 434         return 0;
 435 }
 436
 437 int cmd_push(int argc, const char **argv, const char *prefix)
 438 {
 439         int flags = 0;
 440         int tags = 0;
 441         int rc;
 442         const char *repo = NULL;        /* default repository */
 443         struct option options[] = {
 444                 OPT__VERBOSITY(&verbosity),
 445                 OPT_STRING( 0 , "repo", &repo, N_("repository"), N_("repository")),
 446                 OPT_BIT( 0 , "all", &flags, N_("push all refs"), TRANSPORT_PUSH_ALL),
 447                 OPT_BIT( 0 , "mirror", &flags, N_("mirror all refs"),
 448                             (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE)),
 449                 OPT_BOOLEAN( 0, "delete", &deleterefs, N_("delete refs")),
 450                 OPT_BOOLEAN( 0 , "tags", &tags, N_("push tags (can't be used with --all or --mirror)")),
 451                 OPT_BIT('n' , "dry-run", &flags, N_("dry run"), TRANSPORT_PUSH_DRY_RUN),
 452                 OPT_BIT( 0,  "porcelain", &flags, N_("machine-readable output"), TRANSPORT_PUSH_PORCELAIN),
 453                 OPT_BIT('f', "force", &flags, N_("force updates"), TRANSPORT_PUSH_FORCE),
 454                 { OPTION_CALLBACK, 0, "recurse-submodules", &flags, N_("check"),
 455                         N_("control recursive pushing of submodules"),
 456                         PARSE_OPT_OPTARG, option_parse_recurse_submodules },
 457                 OPT_BOOLEAN( 0 , "thin", &thin, N_("use thin pack")),
 458                 OPT_STRING( 0 , "receive-pack", &receivepack, "receive-pack", N_("receive pack program")),
 459                 OPT_STRING( 0 , "exec", &receivepack, "receive-pack", N_("receive pack program")),
 460                 OPT_BIT('u', "set-upstream", &flags, N_("set upstream for git pull/status"),
 461                         TRANSPORT_PUSH_SET_UPSTREAM),
 462                 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
 463                 OPT_BIT(0, "prune", &flags, N_("prune locally removed refs"),
 464                         TRANSPORT_PUSH_PRUNE),
 465                 OPT_BIT(0, "no-verify", &flags, N_("bypass pre-push hook"), TRANSPORT_PUSH_NO_HOOK),
 466                 OPT_BIT(0, "follow-tags", &flags, N_("push missing but relevant tags"),
 467                         TRANSPORT_PUSH_FOLLOW_TAGS),
 468                 OPT_END()
 469         };
 470
 471         packet_trace_identity("push");
 472         git_config(git_default_config, NULL);
 473         argc = parse_options(argc, argv, prefix, options, push_usage, 0);
 474
 475         if (deleterefs && (tags || (flags & (TRANSPORT_PUSH_ALL | TRANSPORT_PUSH_MIRROR))))
 476                 die(_("--delete is incompatible with --all, --mirror and --tags"));
 477         if (deleterefs && argc < 2)
 478                 die(_("--delete doesn't make sense without any refs"));
 479
 480         if (tags)
 481                 add_refspec("refs/tags/*");
 482
 483         if (argc > 0) {
 484                 repo = argv[0];
 485                 set_refspecs(argv + 1, argc - 1);
 486         }
 487
 488         rc = do_push(repo, flags);
 489         if (rc == -1)
 490                 usage_with_options(push_usage, options);
 491         else
 492                 return rc;
 493 }