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 void setup_push_upstream(struct remote *remote, int simple)
 117 {
 118         struct strbuf refspec = STRBUF_INIT;
 119         struct branch *branch = branch_get(NULL);
 120         if (!branch)
 121                 die(_("You are not currently on a branch.\n"
 122                     "To push the history leading to the current (detached HEAD)\n"
 123                     "state now, use\n"
 124                     "\n"
 125                     "    git push %s HEAD:<name-of-remote-branch>\n"),
 126                     remote->name);
 127         if (!branch->merge_nr || !branch->merge || !branch->remote_name)
 128                 die(_("The current branch %s has no upstream branch.\n"
 129                     "To push the current branch and set the remote as upstream, use\n"
 130                     "\n"
 131                     "    git push --set-upstream %s %s\n"),
 132                     branch->name,
 133                     remote->name,
 134                     branch->name);
 135         if (branch->merge_nr != 1)
 136                 die(_("The current branch %s has multiple upstream branches, "
 137                     "refusing to push."), branch->name);
 138         if (strcmp(branch->remote_name, remote->name))
 139                 die(_("You are pushing to remote '%s', which is not the upstream of\n"
 140                       "your current branch '%s', without telling me what to push\n"
 141                       "to update which remote branch."),
 142                     remote->name, branch->name);
 143         if (simple && strcmp(branch->refname, branch->merge[0]->src))
 144                 die_push_simple(branch, remote);
 145
 146         strbuf_addf(&refspec, "%s:%s", branch->name, branch->merge[0]->src);
 147         add_refspec(refspec.buf);
 148 }
 149
 150 static char warn_unspecified_push_default_msg[] =
 151 N_("push.default is unset; its implicit value is changing in\n"
 152    "Git 2.0 from 'matching' to 'simple'. To squelch this message\n"
 153    "and maintain the current behavior after the default changes, use:\n"
 154    "\n"
 155    "  git config --global push.default matching\n"
 156    "\n"
 157    "To squelch this message and adopt the new behavior now, use:\n"
 158    "\n"
 159    "  git config --global push.default simple\n"
 160    "\n"
 161    "See 'git help config' and search for 'push.default' for further information.\n"
 162    "(the 'simple' mode was introduced in Git 1.7.11. Use the similar mode\n"
 163    "'current' instead of 'simple' if you sometimes use older versions of Git)");
 164
 165 static void warn_unspecified_push_default_configuration(void)
 166 {
 167         static int warn_once;
 168
 169         if (warn_once++)
 170                 return;
 171         warning("%s\n", _(warn_unspecified_push_default_msg));
 172 }
 173
 174 static void setup_default_push_refspecs(struct remote *remote)
 175 {
 176         switch (push_default) {
 177         default:
 178         case PUSH_DEFAULT_UNSPECIFIED:
 179                 default_matching_used = 1;
 180                 warn_unspecified_push_default_configuration();
 181                 /* fallthru */
 182         case PUSH_DEFAULT_MATCHING:
 183                 add_refspec(":");
 184                 break;
 185
 186         case PUSH_DEFAULT_SIMPLE:
 187                 setup_push_upstream(remote, 1);
 188                 break;
 189
 190         case PUSH_DEFAULT_UPSTREAM:
 191                 setup_push_upstream(remote, 0);
 192                 break;
 193
 194         case PUSH_DEFAULT_CURRENT:
 195                 add_refspec("HEAD");
 196                 break;
 197
 198         case PUSH_DEFAULT_NOTHING:
 199                 die(_("You didn't specify any refspecs to push, and "
 200                     "push.default is \"nothing\"."));
 201                 break;
 202         }
 203 }
 204
 205 static const char message_advice_pull_before_push[] =
 206         N_("Updates were rejected because the tip of your current branch is behind\n"
 207            "its remote counterpart. Merge the remote changes (e.g. 'git pull')\n"
 208            "before pushing again.\n"
 209            "See the 'Note about fast-forwards' in 'git push --help' for details.");
 210
 211 static const char message_advice_use_upstream[] =
 212         N_("Updates were rejected because a pushed branch tip is behind its remote\n"
 213            "counterpart. If you did not intend to push that branch, you may want to\n"
 214            "specify branches to push or set the 'push.default' configuration variable\n"
 215            "to 'simple', 'current' or 'upstream' to push only the current branch.");
 216
 217 static const char message_advice_checkout_pull_push[] =
 218         N_("Updates were rejected because a pushed branch tip is behind its remote\n"
 219            "counterpart. Check out this branch and merge the remote changes\n"
 220            "(e.g. 'git pull') before pushing again.\n"
 221            "See the 'Note about fast-forwards' in 'git push --help' for details.");
 222
 223 static const char message_advice_ref_fetch_first[] =
 224         N_("Updates were rejected because the remote contains work that you do\n"
 225            "not have locally. This is usually caused by another repository pushing\n"
 226            "to the same ref. You may want to first merge the remote changes (e.g.,\n"
 227            "'git pull') before pushing again.\n"
 228            "See the 'Note about fast-forwards' in 'git push --help' for details.");
 229
 230 static const char message_advice_ref_already_exists[] =
 231         N_("Updates were rejected because the tag already exists in the remote.");
 232
 233 static const char message_advice_ref_needs_force[] =
 234         N_("You cannot update a remote ref that points at a non-commit object,\n"
 235            "or update a remote ref to make it point at a non-commit object,\n"
 236            "without using the '--force' option.\n");
 237
 238 static void advise_pull_before_push(void)
 239 {
 240         if (!advice_push_non_ff_current || !advice_push_update_rejected)
 241                 return;
 242         advise(_(message_advice_pull_before_push));
 243 }
 244
 245 static void advise_use_upstream(void)
 246 {
 247         if (!advice_push_non_ff_default || !advice_push_update_rejected)
 248                 return;
 249         advise(_(message_advice_use_upstream));
 250 }
 251
 252 static void advise_checkout_pull_push(void)
 253 {
 254         if (!advice_push_non_ff_matching || !advice_push_update_rejected)
 255                 return;
 256         advise(_(message_advice_checkout_pull_push));
 257 }
 258
 259 static void advise_ref_already_exists(void)
 260 {
 261         if (!advice_push_already_exists || !advice_push_update_rejected)
 262                 return;
 263         advise(_(message_advice_ref_already_exists));
 264 }
 265
 266 static void advise_ref_fetch_first(void)
 267 {
 268         if (!advice_push_fetch_first || !advice_push_update_rejected)
 269                 return;
 270         advise(_(message_advice_ref_fetch_first));
 271 }
 272
 273 static void advise_ref_needs_force(void)
 274 {
 275         if (!advice_push_needs_force || !advice_push_update_rejected)
 276                 return;
 277         advise(_(message_advice_ref_needs_force));
 278 }
 279
 280 static int push_with_options(struct transport *transport, int flags)
 281 {
 282         int err;
 283         unsigned int reject_reasons;
 284
 285         transport_set_verbosity(transport, verbosity, progress);
 286
 287         if (receivepack)
 288                 transport_set_option(transport,
 289                                      TRANS_OPT_RECEIVEPACK, receivepack);
 290         if (thin)
 291                 transport_set_option(transport, TRANS_OPT_THIN, "yes");
 292
 293         if (verbosity > 0)
 294                 fprintf(stderr, _("Pushing to %s\n"), transport->url);
 295         err = transport_push(transport, refspec_nr, refspec, flags,
 296                              &reject_reasons);
 297         if (err != 0)
 298                 error(_("failed to push some refs to '%s'"), transport->url);
 299
 300         err |= transport_disconnect(transport);
 301         if (!err)
 302                 return 0;
 303
 304         if (reject_reasons & REJECT_NON_FF_HEAD) {
 305                 advise_pull_before_push();
 306         } else if (reject_reasons & REJECT_NON_FF_OTHER) {
 307                 if (default_matching_used)
 308                         advise_use_upstream();
 309                 else
 310                         advise_checkout_pull_push();
 311         } else if (reject_reasons & REJECT_ALREADY_EXISTS) {
 312                 advise_ref_already_exists();
 313         } else if (reject_reasons & REJECT_FETCH_FIRST) {
 314                 advise_ref_fetch_first();
 315         } else if (reject_reasons & REJECT_NEEDS_FORCE) {
 316                 advise_ref_needs_force();
 317         }
 318
 319         return 1;
 320 }
 321
 322 static int do_push(const char *repo, int flags)
 323 {
 324         int i, errs;
 325         struct remote *remote = remote_get(repo);
 326         const char **url;
 327         int url_nr;
 328
 329         if (!remote) {
 330                 if (repo)
 331                         die(_("bad repository '%s'"), repo);
 332                 die(_("No configured push destination.\n"
 333                     "Either specify the URL from the command-line or configure a remote repository using\n"
 334                     "\n"
 335                     "    git remote add <name> <url>\n"
 336                     "\n"
 337                     "and then push using the remote name\n"
 338                     "\n"
 339                     "    git push <name>\n"));
 340         }
 341
 342         if (remote->mirror)
 343                 flags |= (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE);
 344
 345         if ((flags & TRANSPORT_PUSH_ALL) && refspec) {
 346                 if (!strcmp(*refspec, "refs/tags/*"))
 347                         return error(_("--all and --tags are incompatible"));
 348                 return error(_("--all can't be combined with refspecs"));
 349         }
 350
 351         if ((flags & TRANSPORT_PUSH_MIRROR) && refspec) {
 352                 if (!strcmp(*refspec, "refs/tags/*"))
 353                         return error(_("--mirror and --tags are incompatible"));
 354                 return error(_("--mirror can't be combined with refspecs"));
 355         }
 356
 357         if ((flags & (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) ==
 358                                 (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) {
 359                 return error(_("--all and --mirror are incompatible"));
 360         }
 361
 362         if (!refspec && !(flags & TRANSPORT_PUSH_ALL)) {
 363                 if (remote->push_refspec_nr) {
 364                         refspec = remote->push_refspec;
 365                         refspec_nr = remote->push_refspec_nr;
 366                 } else if (!(flags & TRANSPORT_PUSH_MIRROR))
 367                         setup_default_push_refspecs(remote);
 368         }
 369         errs = 0;
 370         url_nr = push_url_of_remote(remote, &url);
 371         if (url_nr) {
 372                 for (i = 0; i < url_nr; i++) {
 373                         struct transport *transport =
 374                                 transport_get(remote, url[i]);
 375                         if (push_with_options(transport, flags))
 376                                 errs++;
 377                 }
 378         } else {
 379                 struct transport *transport =
 380                         transport_get(remote, NULL);
 381
 382                 if (push_with_options(transport, flags))
 383                         errs++;
 384         }
 385         return !!errs;
 386 }
 387
 388 static int option_parse_recurse_submodules(const struct option *opt,
 389                                    const char *arg, int unset)
 390 {
 391         int *flags = opt->value;
 392
 393         if (*flags & (TRANSPORT_RECURSE_SUBMODULES_CHECK |
 394                       TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND))
 395                 die("%s can only be used once.", opt->long_name);
 396
 397         if (arg) {
 398                 if (!strcmp(arg, "check"))
 399                         *flags |= TRANSPORT_RECURSE_SUBMODULES_CHECK;
 400                 else if (!strcmp(arg, "on-demand"))
 401                         *flags |= TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND;
 402                 else
 403                         die("bad %s argument: %s", opt->long_name, arg);
 404         } else
 405                 die("option %s needs an argument (check|on-demand)",
 406                                 opt->long_name);
 407
 408         return 0;
 409 }
 410
 411 int cmd_push(int argc, const char **argv, const char *prefix)
 412 {
 413         int flags = 0;
 414         int tags = 0;
 415         int rc;
 416         const char *repo = NULL;        /* default repository */
 417         struct option options[] = {
 418                 OPT__VERBOSITY(&verbosity),
 419                 OPT_STRING( 0 , "repo", &repo, N_("repository"), N_("repository")),
 420                 OPT_BIT( 0 , "all", &flags, N_("push all refs"), TRANSPORT_PUSH_ALL),
 421                 OPT_BIT( 0 , "mirror", &flags, N_("mirror all refs"),
 422                             (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE)),
 423                 OPT_BOOLEAN( 0, "delete", &deleterefs, N_("delete refs")),
 424                 OPT_BOOLEAN( 0 , "tags", &tags, N_("push tags (can't be used with --all or --mirror)")),
 425                 OPT_BIT('n' , "dry-run", &flags, N_("dry run"), TRANSPORT_PUSH_DRY_RUN),
 426                 OPT_BIT( 0,  "porcelain", &flags, N_("machine-readable output"), TRANSPORT_PUSH_PORCELAIN),
 427                 OPT_BIT('f', "force", &flags, N_("force updates"), TRANSPORT_PUSH_FORCE),
 428                 { OPTION_CALLBACK, 0, "recurse-submodules", &flags, N_("check"),
 429                         N_("control recursive pushing of submodules"),
 430                         PARSE_OPT_OPTARG, option_parse_recurse_submodules },
 431                 OPT_BOOLEAN( 0 , "thin", &thin, N_("use thin pack")),
 432                 OPT_STRING( 0 , "receive-pack", &receivepack, "receive-pack", N_("receive pack program")),
 433                 OPT_STRING( 0 , "exec", &receivepack, "receive-pack", N_("receive pack program")),
 434                 OPT_BIT('u', "set-upstream", &flags, N_("set upstream for git pull/status"),
 435                         TRANSPORT_PUSH_SET_UPSTREAM),
 436                 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
 437                 OPT_BIT(0, "prune", &flags, N_("prune locally removed refs"),
 438                         TRANSPORT_PUSH_PRUNE),
 439                 OPT_BIT(0, "no-verify", &flags, N_("bypass pre-push hook"), TRANSPORT_PUSH_NO_HOOK),
 440                 OPT_END()
 441         };
 442
 443         packet_trace_identity("push");
 444         git_config(git_default_config, NULL);
 445         argc = parse_options(argc, argv, prefix, options, push_usage, 0);
 446
 447         if (deleterefs && (tags || (flags & (TRANSPORT_PUSH_ALL | TRANSPORT_PUSH_MIRROR))))
 448                 die(_("--delete is incompatible with --all, --mirror and --tags"));
 449         if (deleterefs && argc < 2)
 450                 die(_("--delete doesn't make sense without any refs"));
 451
 452         if (tags)
 453                 add_refspec("refs/tags/*");
 454
 455         if (argc > 0) {
 456                 repo = argv[0];
 457                 set_refspecs(argv + 1, argc - 1);
 458         }
 459
 460         rc = do_push(repo, flags);
 461         if (rc == -1)
 462                 usage_with_options(push_usage, options);
 463         else
 464                 return rc;
 465 }