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