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 void setup_default_push_refspecs(struct remote *remote)
 151 {
 152         switch (push_default) {
 153         default:
 154         case PUSH_DEFAULT_UNSPECIFIED:
 155                 default_matching_used = 1;
 156                 /* fallthru */
 157         case PUSH_DEFAULT_MATCHING:
 158                 add_refspec(":");
 159                 break;
 160
 161         case PUSH_DEFAULT_SIMPLE:
 162                 setup_push_upstream(remote, 1);
 163                 break;
 164
 165         case PUSH_DEFAULT_UPSTREAM:
 166                 setup_push_upstream(remote, 0);
 167                 break;
 168
 169         case PUSH_DEFAULT_CURRENT:
 170                 add_refspec("HEAD");
 171                 break;
 172
 173         case PUSH_DEFAULT_NOTHING:
 174                 die(_("You didn't specify any refspecs to push, and "
 175                     "push.default is \"nothing\"."));
 176                 break;
 177         }
 178 }
 179
 180 static const char message_advice_pull_before_push[] =
 181         N_("Updates were rejected because the tip of your current branch is behind\n"
 182            "its remote counterpart. Merge the remote changes (e.g. 'git pull')\n"
 183            "before pushing again.\n"
 184            "See the 'Note about fast-forwards' in 'git push --help' for details.");
 185
 186 static const char message_advice_use_upstream[] =
 187         N_("Updates were rejected because a pushed branch tip is behind its remote\n"
 188            "counterpart. If you did not intend to push that branch, you may want to\n"
 189            "specify branches to push or set the 'push.default' configuration\n"
 190            "variable to 'current' or 'upstream' to push only the current branch.");
 191
 192 static const char message_advice_checkout_pull_push[] =
 193         N_("Updates were rejected because a pushed branch tip is behind its remote\n"
 194            "counterpart. Check out this branch and merge the remote changes\n"
 195            "(e.g. 'git pull') before pushing again.\n"
 196            "See the 'Note about fast-forwards' in 'git push --help' for details.");
 197
 198 static void advise_pull_before_push(void)
 199 {
 200         if (!advice_push_non_ff_current || !advice_push_nonfastforward)
 201                 return;
 202         advise(_(message_advice_pull_before_push));
 203 }
 204
 205 static void advise_use_upstream(void)
 206 {
 207         if (!advice_push_non_ff_default || !advice_push_nonfastforward)
 208                 return;
 209         advise(_(message_advice_use_upstream));
 210 }
 211
 212 static void advise_checkout_pull_push(void)
 213 {
 214         if (!advice_push_non_ff_matching || !advice_push_nonfastforward)
 215                 return;
 216         advise(_(message_advice_checkout_pull_push));
 217 }
 218
 219 static int push_with_options(struct transport *transport, int flags)
 220 {
 221         int err;
 222         int nonfastforward;
 223
 224         transport_set_verbosity(transport, verbosity, progress);
 225
 226         if (receivepack)
 227                 transport_set_option(transport,
 228                                      TRANS_OPT_RECEIVEPACK, receivepack);
 229         if (thin)
 230                 transport_set_option(transport, TRANS_OPT_THIN, "yes");
 231
 232         if (verbosity > 0)
 233                 fprintf(stderr, _("Pushing to %s\n"), transport->url);
 234         err = transport_push(transport, refspec_nr, refspec, flags,
 235                              &nonfastforward);
 236         if (err != 0)
 237                 error(_("failed to push some refs to '%s'"), transport->url);
 238
 239         err |= transport_disconnect(transport);
 240         if (!err)
 241                 return 0;
 242
 243         switch (nonfastforward) {
 244         default:
 245                 break;
 246         case NON_FF_HEAD:
 247                 advise_pull_before_push();
 248                 break;
 249         case NON_FF_OTHER:
 250                 if (default_matching_used)
 251                         advise_use_upstream();
 252                 else
 253                         advise_checkout_pull_push();
 254                 break;
 255         }
 256
 257         return 1;
 258 }
 259
 260 static int do_push(const char *repo, int flags)
 261 {
 262         int i, errs;
 263         struct remote *remote = remote_get(repo);
 264         const char **url;
 265         int url_nr;
 266
 267         if (!remote) {
 268                 if (repo)
 269                         die(_("bad repository '%s'"), repo);
 270                 die(_("No configured push destination.\n"
 271                     "Either specify the URL from the command-line or configure a remote repository using\n"
 272                     "\n"
 273                     "    git remote add <name> <url>\n"
 274                     "\n"
 275                     "and then push using the remote name\n"
 276                     "\n"
 277                     "    git push <name>\n"));
 278         }
 279
 280         if (remote->mirror)
 281                 flags |= (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE);
 282
 283         if ((flags & TRANSPORT_PUSH_ALL) && refspec) {
 284                 if (!strcmp(*refspec, "refs/tags/*"))
 285                         return error(_("--all and --tags are incompatible"));
 286                 return error(_("--all can't be combined with refspecs"));
 287         }
 288
 289         if ((flags & TRANSPORT_PUSH_MIRROR) && refspec) {
 290                 if (!strcmp(*refspec, "refs/tags/*"))
 291                         return error(_("--mirror and --tags are incompatible"));
 292                 return error(_("--mirror can't be combined with refspecs"));
 293         }
 294
 295         if ((flags & (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) ==
 296                                 (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) {
 297                 return error(_("--all and --mirror are incompatible"));
 298         }
 299
 300         if (!refspec && !(flags & TRANSPORT_PUSH_ALL)) {
 301                 if (remote->push_refspec_nr) {
 302                         refspec = remote->push_refspec;
 303                         refspec_nr = remote->push_refspec_nr;
 304                 } else if (!(flags & TRANSPORT_PUSH_MIRROR))
 305                         setup_default_push_refspecs(remote);
 306         }
 307         errs = 0;
 308         url_nr = push_url_of_remote(remote, &url);
 309         if (url_nr) {
 310                 for (i = 0; i < url_nr; i++) {
 311                         struct transport *transport =
 312                                 transport_get(remote, url[i]);
 313                         if (push_with_options(transport, flags))
 314                                 errs++;
 315                 }
 316         } else {
 317                 struct transport *transport =
 318                         transport_get(remote, NULL);
 319
 320                 if (push_with_options(transport, flags))
 321                         errs++;
 322         }
 323         return !!errs;
 324 }
 325
 326 static int option_parse_recurse_submodules(const struct option *opt,
 327                                    const char *arg, int unset)
 328 {
 329         int *flags = opt->value;
 330
 331         if (*flags & (TRANSPORT_RECURSE_SUBMODULES_CHECK |
 332                       TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND))
 333                 die("%s can only be used once.", opt->long_name);
 334
 335         if (arg) {
 336                 if (!strcmp(arg, "check"))
 337                         *flags |= TRANSPORT_RECURSE_SUBMODULES_CHECK;
 338                 else if (!strcmp(arg, "on-demand"))
 339                         *flags |= TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND;
 340                 else
 341                         die("bad %s argument: %s", opt->long_name, arg);
 342         } else
 343                 die("option %s needs an argument (check|on-demand)",
 344                                 opt->long_name);
 345
 346         return 0;
 347 }
 348
 349 int cmd_push(int argc, const char **argv, const char *prefix)
 350 {
 351         int flags = 0;
 352         int tags = 0;
 353         int rc;
 354         const char *repo = NULL;        /* default repository */
 355         struct option options[] = {
 356                 OPT__VERBOSITY(&verbosity),
 357                 OPT_STRING( 0 , "repo", &repo, "repository", "repository"),
 358                 OPT_BIT( 0 , "all", &flags, "push all refs", TRANSPORT_PUSH_ALL),
 359                 OPT_BIT( 0 , "mirror", &flags, "mirror all refs",
 360                             (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE)),
 361                 OPT_BOOLEAN( 0, "delete", &deleterefs, "delete refs"),
 362                 OPT_BOOLEAN( 0 , "tags", &tags, "push tags (can't be used with --all or --mirror)"),
 363                 OPT_BIT('n' , "dry-run", &flags, "dry run", TRANSPORT_PUSH_DRY_RUN),
 364                 OPT_BIT( 0,  "porcelain", &flags, "machine-readable output", TRANSPORT_PUSH_PORCELAIN),
 365                 OPT_BIT('f', "force", &flags, "force updates", TRANSPORT_PUSH_FORCE),
 366                 { OPTION_CALLBACK, 0, "recurse-submodules", &flags, "check",
 367                         "controls recursive pushing of submodules",
 368                         PARSE_OPT_OPTARG, option_parse_recurse_submodules },
 369                 OPT_BOOLEAN( 0 , "thin", &thin, "use thin pack"),
 370                 OPT_STRING( 0 , "receive-pack", &receivepack, "receive-pack", "receive pack program"),
 371                 OPT_STRING( 0 , "exec", &receivepack, "receive-pack", "receive pack program"),
 372                 OPT_BIT('u', "set-upstream", &flags, "set upstream for git pull/status",
 373                         TRANSPORT_PUSH_SET_UPSTREAM),
 374                 OPT_BOOL(0, "progress", &progress, "force progress reporting"),
 375                 OPT_BIT(0, "prune", &flags, "prune locally removed refs",
 376                         TRANSPORT_PUSH_PRUNE),
 377                 OPT_END()
 378         };
 379
 380         packet_trace_identity("push");
 381         git_config(git_default_config, NULL);
 382         argc = parse_options(argc, argv, prefix, options, push_usage, 0);
 383
 384         if (deleterefs && (tags || (flags & (TRANSPORT_PUSH_ALL | TRANSPORT_PUSH_MIRROR))))
 385                 die(_("--delete is incompatible with --all, --mirror and --tags"));
 386         if (deleterefs && argc < 2)
 387                 die(_("--delete doesn't make sense without any refs"));
 388
 389         if (tags)
 390                 add_refspec("refs/tags/*");
 391
 392         if (argc > 0) {
 393                 repo = argv[0];
 394                 set_refspecs(argv + 1, argc - 1);
 395         }
 396
 397         rc = do_push(repo, flags);
 398         if (rc == -1)
 399                 usage_with_options(push_usage, options);
 400         else
 401                 return rc;
 402 }