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 void setup_push_upstream(struct remote *remote)
  80 {
  81         struct strbuf refspec = STRBUF_INIT;
  82         struct branch *branch = branch_get(NULL);
  83         if (!branch)
  84                 die(_("You are not currently on a branch.\n"
  85                     "To push the history leading to the current (detached HEAD)\n"
  86                     "state now, use\n"
  87                     "\n"
  88                     "    git push %s HEAD:<name-of-remote-branch>\n"),
  89                     remote->name);
  90         if (!branch->merge_nr || !branch->merge || !branch->remote_name)
  91                 die(_("The current branch %s has no upstream branch.\n"
  92                     "To push the current branch and set the remote as upstream, use\n"
  93                     "\n"
  94                     "    git push --set-upstream %s %s\n"),
  95                     branch->name,
  96                     remote->name,
  97                     branch->name);
  98         if (branch->merge_nr != 1)
  99                 die(_("The current branch %s has multiple upstream branches, "
 100                     "refusing to push."), branch->name);
 101         if (strcmp(branch->remote_name, remote->name))
 102                 die(_("You are pushing to remote '%s', which is not the upstream of\n"
 103                       "your current branch '%s', without telling me what to push\n"
 104                       "to update which remote branch."),
 105                     remote->name, branch->name);
 106
 107         strbuf_addf(&refspec, "%s:%s", branch->name, branch->merge[0]->src);
 108         add_refspec(refspec.buf);
 109 }
 110
 111 static void setup_default_push_refspecs(struct remote *remote)
 112 {
 113         switch (push_default) {
 114         default:
 115         case PUSH_DEFAULT_UNSPECIFIED:
 116                 default_matching_used = 1;
 117                 /* fallthru */
 118         case PUSH_DEFAULT_MATCHING:
 119                 add_refspec(":");
 120                 break;
 121
 122         case PUSH_DEFAULT_UPSTREAM:
 123                 setup_push_upstream(remote);
 124                 break;
 125
 126         case PUSH_DEFAULT_CURRENT:
 127                 add_refspec("HEAD");
 128                 break;
 129
 130         case PUSH_DEFAULT_NOTHING:
 131                 die(_("You didn't specify any refspecs to push, and "
 132                     "push.default is \"nothing\"."));
 133                 break;
 134         }
 135 }
 136
 137 static const char message_advice_pull_before_push[] =
 138         N_("Updates were rejected because the tip of your current branch is behind\n"
 139            "its remote counterpart. Merge the remote changes (e.g. 'git pull')\n"
 140            "before pushing again.\n"
 141            "See the 'Note about fast-forwards' in 'git push --help' for details.");
 142
 143 static const char message_advice_use_upstream[] =
 144         N_("Updates were rejected because a pushed branch tip is behind its remote\n"
 145            "counterpart. If you did not intend to push that branch, you may want to\n"
 146            "specify branches to push or set the 'push.default' configuration\n"
 147            "variable to 'current' or 'upstream' to push only the current branch.");
 148
 149 static const char message_advice_checkout_pull_push[] =
 150         N_("Updates were rejected because a pushed branch tip is behind its remote\n"
 151            "counterpart. Check out this branch and merge the remote changes\n"
 152            "(e.g. 'git pull') before pushing again.\n"
 153            "See the 'Note about fast-forwards' in 'git push --help' for details.");
 154
 155 static void advise_pull_before_push(void)
 156 {
 157         if (!advice_push_non_ff_current || !advice_push_nonfastforward)
 158                 return;
 159         advise(_(message_advice_pull_before_push));
 160 }
 161
 162 static void advise_use_upstream(void)
 163 {
 164         if (!advice_push_non_ff_default || !advice_push_nonfastforward)
 165                 return;
 166         advise(_(message_advice_use_upstream));
 167 }
 168
 169 static void advise_checkout_pull_push(void)
 170 {
 171         if (!advice_push_non_ff_matching || !advice_push_nonfastforward)
 172                 return;
 173         advise(_(message_advice_checkout_pull_push));
 174 }
 175
 176 static int push_with_options(struct transport *transport, int flags)
 177 {
 178         int err;
 179         int nonfastforward;
 180
 181         transport_set_verbosity(transport, verbosity, progress);
 182
 183         if (receivepack)
 184                 transport_set_option(transport,
 185                                      TRANS_OPT_RECEIVEPACK, receivepack);
 186         if (thin)
 187                 transport_set_option(transport, TRANS_OPT_THIN, "yes");
 188
 189         if (verbosity > 0)
 190                 fprintf(stderr, _("Pushing to %s\n"), transport->url);
 191         err = transport_push(transport, refspec_nr, refspec, flags,
 192                              &nonfastforward);
 193         if (err != 0)
 194                 error(_("failed to push some refs to '%s'"), transport->url);
 195
 196         err |= transport_disconnect(transport);
 197         if (!err)
 198                 return 0;
 199
 200         switch (nonfastforward) {
 201         default:
 202                 break;
 203         case NON_FF_HEAD:
 204                 advise_pull_before_push();
 205                 break;
 206         case NON_FF_OTHER:
 207                 if (default_matching_used)
 208                         advise_use_upstream();
 209                 else
 210                         advise_checkout_pull_push();
 211                 break;
 212         }
 213
 214         return 1;
 215 }
 216
 217 static int do_push(const char *repo, int flags)
 218 {
 219         int i, errs;
 220         struct remote *remote = remote_get(repo);
 221         const char **url;
 222         int url_nr;
 223
 224         if (!remote) {
 225                 if (repo)
 226                         die(_("bad repository '%s'"), repo);
 227                 die(_("No configured push destination.\n"
 228                     "Either specify the URL from the command-line or configure a remote repository using\n"
 229                     "\n"
 230                     "    git remote add <name> <url>\n"
 231                     "\n"
 232                     "and then push using the remote name\n"
 233                     "\n"
 234                     "    git push <name>\n"));
 235         }
 236
 237         if (remote->mirror)
 238                 flags |= (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE);
 239
 240         if ((flags & TRANSPORT_PUSH_ALL) && refspec) {
 241                 if (!strcmp(*refspec, "refs/tags/*"))
 242                         return error(_("--all and --tags are incompatible"));
 243                 return error(_("--all can't be combined with refspecs"));
 244         }
 245
 246         if ((flags & TRANSPORT_PUSH_MIRROR) && refspec) {
 247                 if (!strcmp(*refspec, "refs/tags/*"))
 248                         return error(_("--mirror and --tags are incompatible"));
 249                 return error(_("--mirror can't be combined with refspecs"));
 250         }
 251
 252         if ((flags & (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) ==
 253                                 (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) {
 254                 return error(_("--all and --mirror are incompatible"));
 255         }
 256
 257         if (!refspec && !(flags & TRANSPORT_PUSH_ALL)) {
 258                 if (remote->push_refspec_nr) {
 259                         refspec = remote->push_refspec;
 260                         refspec_nr = remote->push_refspec_nr;
 261                 } else if (!(flags & TRANSPORT_PUSH_MIRROR))
 262                         setup_default_push_refspecs(remote);
 263         }
 264         errs = 0;
 265         url_nr = push_url_of_remote(remote, &url);
 266         if (url_nr) {
 267                 for (i = 0; i < url_nr; i++) {
 268                         struct transport *transport =
 269                                 transport_get(remote, url[i]);
 270                         if (push_with_options(transport, flags))
 271                                 errs++;
 272                 }
 273         } else {
 274                 struct transport *transport =
 275                         transport_get(remote, NULL);
 276
 277                 if (push_with_options(transport, flags))
 278                         errs++;
 279         }
 280         return !!errs;
 281 }
 282
 283 static int option_parse_recurse_submodules(const struct option *opt,
 284                                    const char *arg, int unset)
 285 {
 286         int *flags = opt->value;
 287         if (arg) {
 288                 if (!strcmp(arg, "check"))
 289                         *flags |= TRANSPORT_RECURSE_SUBMODULES_CHECK;
 290                 else
 291                         die("bad %s argument: %s", opt->long_name, arg);
 292         } else
 293                 die("option %s needs an argument (check)", opt->long_name);
 294
 295         return 0;
 296 }
 297
 298 int cmd_push(int argc, const char **argv, const char *prefix)
 299 {
 300         int flags = 0;
 301         int tags = 0;
 302         int rc;
 303         const char *repo = NULL;        /* default repository */
 304         struct option options[] = {
 305                 OPT__VERBOSITY(&verbosity),
 306                 OPT_STRING( 0 , "repo", &repo, "repository", "repository"),
 307                 OPT_BIT( 0 , "all", &flags, "push all refs", TRANSPORT_PUSH_ALL),
 308                 OPT_BIT( 0 , "mirror", &flags, "mirror all refs",
 309                             (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE)),
 310                 OPT_BOOLEAN( 0, "delete", &deleterefs, "delete refs"),
 311                 OPT_BOOLEAN( 0 , "tags", &tags, "push tags (can't be used with --all or --mirror)"),
 312                 OPT_BIT('n' , "dry-run", &flags, "dry run", TRANSPORT_PUSH_DRY_RUN),
 313                 OPT_BIT( 0,  "porcelain", &flags, "machine-readable output", TRANSPORT_PUSH_PORCELAIN),
 314                 OPT_BIT('f', "force", &flags, "force updates", TRANSPORT_PUSH_FORCE),
 315                 { OPTION_CALLBACK, 0, "recurse-submodules", &flags, "check",
 316                         "controls recursive pushing of submodules",
 317                         PARSE_OPT_OPTARG, option_parse_recurse_submodules },
 318                 OPT_BOOLEAN( 0 , "thin", &thin, "use thin pack"),
 319                 OPT_STRING( 0 , "receive-pack", &receivepack, "receive-pack", "receive pack program"),
 320                 OPT_STRING( 0 , "exec", &receivepack, "receive-pack", "receive pack program"),
 321                 OPT_BIT('u', "set-upstream", &flags, "set upstream for git pull/status",
 322                         TRANSPORT_PUSH_SET_UPSTREAM),
 323                 OPT_BOOL(0, "progress", &progress, "force progress reporting"),
 324                 OPT_BIT(0, "prune", &flags, "prune locally removed refs",
 325                         TRANSPORT_PUSH_PRUNE),
 326                 OPT_END()
 327         };
 328
 329         packet_trace_identity("push");
 330         git_config(git_default_config, NULL);
 331         argc = parse_options(argc, argv, prefix, options, push_usage, 0);
 332
 333         if (deleterefs && (tags || (flags & (TRANSPORT_PUSH_ALL | TRANSPORT_PUSH_MIRROR))))
 334                 die(_("--delete is incompatible with --all, --mirror and --tags"));
 335         if (deleterefs && argc < 2)
 336                 die(_("--delete doesn't make sense without any refs"));
 337
 338         if (tags)
 339                 add_refspec("refs/tags/*");
 340
 341         if (argc > 0) {
 342                 repo = argv[0];
 343                 set_refspecs(argv + 1, argc - 1);
 344         }
 345
 346         rc = do_push(repo, flags);
 347         if (rc == -1)
 348                 usage_with_options(push_usage, options);
 349         else
 350                 return rc;
 351 }