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_already_exists[] =
 224         N_("Updates were rejected because the destination reference already exists\n"
 225            "in the remote.");
 226
 227 static void advise_pull_before_push(void)
 228 {
 229         if (!advice_push_non_ff_current || !advice_push_update_rejected)
 230                 return;
 231         advise(_(message_advice_pull_before_push));
 232 }
 233
 234 static void advise_use_upstream(void)
 235 {
 236         if (!advice_push_non_ff_default || !advice_push_update_rejected)
 237                 return;
 238         advise(_(message_advice_use_upstream));
 239 }
 240
 241 static void advise_checkout_pull_push(void)
 242 {
 243         if (!advice_push_non_ff_matching || !advice_push_update_rejected)
 244                 return;
 245         advise(_(message_advice_checkout_pull_push));
 246 }
 247
 248 static void advise_ref_already_exists(void)
 249 {
 250         advise(_(message_advice_ref_already_exists));
 251 }
 252
 253 static int push_with_options(struct transport *transport, int flags)
 254 {
 255         int err;
 256         unsigned int reject_reasons;
 257
 258         transport_set_verbosity(transport, verbosity, progress);
 259
 260         if (receivepack)
 261                 transport_set_option(transport,
 262                                      TRANS_OPT_RECEIVEPACK, receivepack);
 263         if (thin)
 264                 transport_set_option(transport, TRANS_OPT_THIN, "yes");
 265
 266         if (verbosity > 0)
 267                 fprintf(stderr, _("Pushing to %s\n"), transport->url);
 268         err = transport_push(transport, refspec_nr, refspec, flags,
 269                              &reject_reasons);
 270         if (err != 0)
 271                 error(_("failed to push some refs to '%s'"), transport->url);
 272
 273         err |= transport_disconnect(transport);
 274         if (!err)
 275                 return 0;
 276
 277         if (reject_reasons & REJECT_NON_FF_HEAD) {
 278                 advise_pull_before_push();
 279         } else if (reject_reasons & REJECT_NON_FF_OTHER) {
 280                 if (default_matching_used)
 281                         advise_use_upstream();
 282                 else
 283                         advise_checkout_pull_push();
 284         } else if (reject_reasons & REJECT_ALREADY_EXISTS) {
 285                 advise_ref_already_exists();
 286         }
 287
 288         return 1;
 289 }
 290
 291 static int do_push(const char *repo, int flags)
 292 {
 293         int i, errs;
 294         struct remote *remote = remote_get(repo);
 295         const char **url;
 296         int url_nr;
 297
 298         if (!remote) {
 299                 if (repo)
 300                         die(_("bad repository '%s'"), repo);
 301                 die(_("No configured push destination.\n"
 302                     "Either specify the URL from the command-line or configure a remote repository using\n"
 303                     "\n"
 304                     "    git remote add <name> <url>\n"
 305                     "\n"
 306                     "and then push using the remote name\n"
 307                     "\n"
 308                     "    git push <name>\n"));
 309         }
 310
 311         if (remote->mirror)
 312                 flags |= (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE);
 313
 314         if ((flags & TRANSPORT_PUSH_ALL) && refspec) {
 315                 if (!strcmp(*refspec, "refs/tags/*"))
 316                         return error(_("--all and --tags are incompatible"));
 317                 return error(_("--all can't be combined with refspecs"));
 318         }
 319
 320         if ((flags & TRANSPORT_PUSH_MIRROR) && refspec) {
 321                 if (!strcmp(*refspec, "refs/tags/*"))
 322                         return error(_("--mirror and --tags are incompatible"));
 323                 return error(_("--mirror can't be combined with refspecs"));
 324         }
 325
 326         if ((flags & (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) ==
 327                                 (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) {
 328                 return error(_("--all and --mirror are incompatible"));
 329         }
 330
 331         if (!refspec && !(flags & TRANSPORT_PUSH_ALL)) {
 332                 if (remote->push_refspec_nr) {
 333                         refspec = remote->push_refspec;
 334                         refspec_nr = remote->push_refspec_nr;
 335                 } else if (!(flags & TRANSPORT_PUSH_MIRROR))
 336                         setup_default_push_refspecs(remote);
 337         }
 338         errs = 0;
 339         url_nr = push_url_of_remote(remote, &url);
 340         if (url_nr) {
 341                 for (i = 0; i < url_nr; i++) {
 342                         struct transport *transport =
 343                                 transport_get(remote, url[i]);
 344                         if (push_with_options(transport, flags))
 345                                 errs++;
 346                 }
 347         } else {
 348                 struct transport *transport =
 349                         transport_get(remote, NULL);
 350
 351                 if (push_with_options(transport, flags))
 352                         errs++;
 353         }
 354         return !!errs;
 355 }
 356
 357 static int option_parse_recurse_submodules(const struct option *opt,
 358                                    const char *arg, int unset)
 359 {
 360         int *flags = opt->value;
 361
 362         if (*flags & (TRANSPORT_RECURSE_SUBMODULES_CHECK |
 363                       TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND))
 364                 die("%s can only be used once.", opt->long_name);
 365
 366         if (arg) {
 367                 if (!strcmp(arg, "check"))
 368                         *flags |= TRANSPORT_RECURSE_SUBMODULES_CHECK;
 369                 else if (!strcmp(arg, "on-demand"))
 370                         *flags |= TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND;
 371                 else
 372                         die("bad %s argument: %s", opt->long_name, arg);
 373         } else
 374                 die("option %s needs an argument (check|on-demand)",
 375                                 opt->long_name);
 376
 377         return 0;
 378 }
 379
 380 int cmd_push(int argc, const char **argv, const char *prefix)
 381 {
 382         int flags = 0;
 383         int tags = 0;
 384         int rc;
 385         const char *repo = NULL;        /* default repository */
 386         struct option options[] = {
 387                 OPT__VERBOSITY(&verbosity),
 388                 OPT_STRING( 0 , "repo", &repo, N_("repository"), N_("repository")),
 389                 OPT_BIT( 0 , "all", &flags, N_("push all refs"), TRANSPORT_PUSH_ALL),
 390                 OPT_BIT( 0 , "mirror", &flags, N_("mirror all refs"),
 391                             (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE)),
 392                 OPT_BOOLEAN( 0, "delete", &deleterefs, N_("delete refs")),
 393                 OPT_BOOLEAN( 0 , "tags", &tags, N_("push tags (can't be used with --all or --mirror)")),
 394                 OPT_BIT('n' , "dry-run", &flags, N_("dry run"), TRANSPORT_PUSH_DRY_RUN),
 395                 OPT_BIT( 0,  "porcelain", &flags, N_("machine-readable output"), TRANSPORT_PUSH_PORCELAIN),
 396                 OPT_BIT('f', "force", &flags, N_("force updates"), TRANSPORT_PUSH_FORCE),
 397                 { OPTION_CALLBACK, 0, "recurse-submodules", &flags, N_("check"),
 398                         N_("control recursive pushing of submodules"),
 399                         PARSE_OPT_OPTARG, option_parse_recurse_submodules },
 400                 OPT_BOOLEAN( 0 , "thin", &thin, N_("use thin pack")),
 401                 OPT_STRING( 0 , "receive-pack", &receivepack, "receive-pack", N_("receive pack program")),
 402                 OPT_STRING( 0 , "exec", &receivepack, "receive-pack", N_("receive pack program")),
 403                 OPT_BIT('u', "set-upstream", &flags, N_("set upstream for git pull/status"),
 404                         TRANSPORT_PUSH_SET_UPSTREAM),
 405                 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
 406                 OPT_BIT(0, "prune", &flags, N_("prune locally removed refs"),
 407                         TRANSPORT_PUSH_PRUNE),
 408                 OPT_END()
 409         };
 410
 411         packet_trace_identity("push");
 412         git_config(git_default_config, NULL);
 413         argc = parse_options(argc, argv, prefix, options, push_usage, 0);
 414
 415         if (deleterefs && (tags || (flags & (TRANSPORT_PUSH_ALL | TRANSPORT_PUSH_MIRROR))))
 416                 die(_("--delete is incompatible with --all, --mirror and --tags"));
 417         if (deleterefs && argc < 2)
 418                 die(_("--delete doesn't make sense without any refs"));
 419
 420         if (tags)
 421                 add_refspec("refs/tags/*");
 422
 423         if (argc > 0) {
 424                 repo = argv[0];
 425                 set_refspecs(argv + 1, argc - 1);
 426         }
 427
 428         rc = do_push(repo, flags);
 429         if (rc == -1)
 430                 usage_with_options(push_usage, options);
 431         else
 432                 return rc;
 433 }