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 void setup_push_upstream(struct remote *remote)
  70 {
  71         struct strbuf refspec = STRBUF_INIT;
  72         struct branch *branch = branch_get(NULL);
  73         if (!branch)
  74                 die(_("You are not currently on a branch.\n"
  75                     "To push the history leading to the current (detached HEAD)\n"
  76                     "state now, use\n"
  77                     "\n"
  78                     "    git push %s HEAD:<name-of-remote-branch>\n"),
  79                     remote->name);
  80         if (!branch->merge_nr || !branch->merge)
  81                 die(_("The current branch %s has no upstream branch.\n"
  82                     "To push the current branch and set the remote as upstream, use\n"
  83                     "\n"
  84                     "    git push --set-upstream %s %s\n"),
  85                     branch->name,
  86                     remote->name,
  87                     branch->name);
  88         if (branch->merge_nr != 1)
  89                 die(_("The current branch %s has multiple upstream branches, "
  90                     "refusing to push."), branch->name);
  91         strbuf_addf(&refspec, "%s:%s", branch->name, branch->merge[0]->src);
  92         add_refspec(refspec.buf);
  93 }
  94
  95 static void setup_default_push_refspecs(struct remote *remote)
  96 {
  97         switch (push_default) {
  98         default:
  99         case PUSH_DEFAULT_UNSPECIFIED:
 100                 default_matching_used = 1;
 101                 /* fallthru */
 102         case PUSH_DEFAULT_MATCHING:
 103                 add_refspec(":");
 104                 break;
 105
 106         case PUSH_DEFAULT_UPSTREAM:
 107                 setup_push_upstream(remote);
 108                 break;
 109
 110         case PUSH_DEFAULT_CURRENT:
 111                 add_refspec("HEAD");
 112                 break;
 113
 114         case PUSH_DEFAULT_NOTHING:
 115                 die(_("You didn't specify any refspecs to push, and "
 116                     "push.default is \"nothing\"."));
 117                 break;
 118         }
 119 }
 120
 121 static const char message_advice_pull_before_push[] =
 122         N_("Updates were rejected because the tip of your current branch is behind\n"
 123            "its remote counterpart. Merge the remote changes (e.g. 'git pull')\n"
 124            "before pushing again.\n"
 125            "See the 'Note about fast-forwards' in 'git push --help' for details.");
 126
 127 static const char message_advice_use_upstream[] =
 128         N_("Updates were rejected because a pushed branch tip is behind its remote\n"
 129            "counterpart. If you did not intend to push that branch, you may want to\n"
 130            "specify branches to push or set the 'push.default' configuration\n"
 131            "variable to 'current' or 'upstream' to push only the current branch.");
 132
 133 static const char message_advice_checkout_pull_push[] =
 134         N_("Updates were rejected because a pushed branch tip is behind its remote\n"
 135            "counterpart. Check out this branch and merge the remote changes\n"
 136            "(e.g. 'git pull') before pushing again.\n"
 137            "See the 'Note about fast-forwards' in 'git push --help' for details.");
 138
 139 static void advise_pull_before_push(void)
 140 {
 141         if (!advice_push_non_ff_current || !advice_push_nonfastforward)
 142                 return;
 143         advise(_(message_advice_pull_before_push));
 144 }
 145
 146 static void advise_use_upstream(void)
 147 {
 148         if (!advice_push_non_ff_default || !advice_push_nonfastforward)
 149                 return;
 150         advise(_(message_advice_use_upstream));
 151 }
 152
 153 static void advise_checkout_pull_push(void)
 154 {
 155         if (!advice_push_non_ff_matching || !advice_push_nonfastforward)
 156                 return;
 157         advise(_(message_advice_checkout_pull_push));
 158 }
 159
 160 static int push_with_options(struct transport *transport, int flags)
 161 {
 162         int err;
 163         int nonfastforward;
 164
 165         transport_set_verbosity(transport, verbosity, progress);
 166
 167         if (receivepack)
 168                 transport_set_option(transport,
 169                                      TRANS_OPT_RECEIVEPACK, receivepack);
 170         if (thin)
 171                 transport_set_option(transport, TRANS_OPT_THIN, "yes");
 172
 173         if (verbosity > 0)
 174                 fprintf(stderr, _("Pushing to %s\n"), transport->url);
 175         err = transport_push(transport, refspec_nr, refspec, flags,
 176                              &nonfastforward);
 177         if (err != 0)
 178                 error(_("failed to push some refs to '%s'"), transport->url);
 179
 180         err |= transport_disconnect(transport);
 181         if (!err)
 182                 return 0;
 183
 184         switch (nonfastforward) {
 185         default:
 186                 break;
 187         case NON_FF_HEAD:
 188                 advise_pull_before_push();
 189                 break;
 190         case NON_FF_OTHER:
 191                 if (default_matching_used)
 192                         advise_use_upstream();
 193                 else
 194                         advise_checkout_pull_push();
 195                 break;
 196         }
 197
 198         return 1;
 199 }
 200
 201 static int do_push(const char *repo, int flags)
 202 {
 203         int i, errs;
 204         struct remote *remote = remote_get(repo);
 205         const char **url;
 206         int url_nr;
 207
 208         if (!remote) {
 209                 if (repo)
 210                         die(_("bad repository '%s'"), repo);
 211                 die(_("No configured push destination.\n"
 212                     "Either specify the URL from the command-line or configure a remote repository using\n"
 213                     "\n"
 214                     "    git remote add <name> <url>\n"
 215                     "\n"
 216                     "and then push using the remote name\n"
 217                     "\n"
 218                     "    git push <name>\n"));
 219         }
 220
 221         if (remote->mirror)
 222                 flags |= (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE);
 223
 224         if ((flags & TRANSPORT_PUSH_ALL) && refspec) {
 225                 if (!strcmp(*refspec, "refs/tags/*"))
 226                         return error(_("--all and --tags are incompatible"));
 227                 return error(_("--all can't be combined with refspecs"));
 228         }
 229
 230         if ((flags & TRANSPORT_PUSH_MIRROR) && refspec) {
 231                 if (!strcmp(*refspec, "refs/tags/*"))
 232                         return error(_("--mirror and --tags are incompatible"));
 233                 return error(_("--mirror can't be combined with refspecs"));
 234         }
 235
 236         if ((flags & (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) ==
 237                                 (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) {
 238                 return error(_("--all and --mirror are incompatible"));
 239         }
 240
 241         if (!refspec && !(flags & TRANSPORT_PUSH_ALL)) {
 242                 if (remote->push_refspec_nr) {
 243                         refspec = remote->push_refspec;
 244                         refspec_nr = remote->push_refspec_nr;
 245                 } else if (!(flags & TRANSPORT_PUSH_MIRROR))
 246                         setup_default_push_refspecs(remote);
 247         }
 248         errs = 0;
 249         if (remote->pushurl_nr) {
 250                 url = remote->pushurl;
 251                 url_nr = remote->pushurl_nr;
 252         } else {
 253                 url = remote->url;
 254                 url_nr = remote->url_nr;
 255         }
 256         if (url_nr) {
 257                 for (i = 0; i < url_nr; i++) {
 258                         struct transport *transport =
 259                                 transport_get(remote, url[i]);
 260                         if (push_with_options(transport, flags))
 261                                 errs++;
 262                 }
 263         } else {
 264                 struct transport *transport =
 265                         transport_get(remote, NULL);
 266
 267                 if (push_with_options(transport, flags))
 268                         errs++;
 269         }
 270         return !!errs;
 271 }
 272
 273 static int option_parse_recurse_submodules(const struct option *opt,
 274                                    const char *arg, int unset)
 275 {
 276         int *flags = opt->value;
 277         if (arg) {
 278                 if (!strcmp(arg, "check"))
 279                         *flags |= TRANSPORT_RECURSE_SUBMODULES_CHECK;
 280                 else
 281                         die("bad %s argument: %s", opt->long_name, arg);
 282         } else
 283                 die("option %s needs an argument (check)", opt->long_name);
 284
 285         return 0;
 286 }
 287
 288 int cmd_push(int argc, const char **argv, const char *prefix)
 289 {
 290         int flags = 0;
 291         int tags = 0;
 292         int rc;
 293         const char *repo = NULL;        /* default repository */
 294         struct option options[] = {
 295                 OPT__VERBOSITY(&verbosity),
 296                 OPT_STRING( 0 , "repo", &repo, "repository", "repository"),
 297                 OPT_BIT( 0 , "all", &flags, "push all refs", TRANSPORT_PUSH_ALL),
 298                 OPT_BIT( 0 , "mirror", &flags, "mirror all refs",
 299                             (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE)),
 300                 OPT_BOOLEAN( 0, "delete", &deleterefs, "delete refs"),
 301                 OPT_BOOLEAN( 0 , "tags", &tags, "push tags (can't be used with --all or --mirror)"),
 302                 OPT_BIT('n' , "dry-run", &flags, "dry run", TRANSPORT_PUSH_DRY_RUN),
 303                 OPT_BIT( 0,  "porcelain", &flags, "machine-readable output", TRANSPORT_PUSH_PORCELAIN),
 304                 OPT_BIT('f', "force", &flags, "force updates", TRANSPORT_PUSH_FORCE),
 305                 { OPTION_CALLBACK, 0, "recurse-submodules", &flags, "check",
 306                         "controls recursive pushing of submodules",
 307                         PARSE_OPT_OPTARG, option_parse_recurse_submodules },
 308                 OPT_BOOLEAN( 0 , "thin", &thin, "use thin pack"),
 309                 OPT_STRING( 0 , "receive-pack", &receivepack, "receive-pack", "receive pack program"),
 310                 OPT_STRING( 0 , "exec", &receivepack, "receive-pack", "receive pack program"),
 311                 OPT_BIT('u', "set-upstream", &flags, "set upstream for git pull/status",
 312                         TRANSPORT_PUSH_SET_UPSTREAM),
 313                 OPT_BOOL(0, "progress", &progress, "force progress reporting"),
 314                 OPT_BIT(0, "prune", &flags, "prune locally removed refs",
 315                         TRANSPORT_PUSH_PRUNE),
 316                 OPT_END()
 317         };
 318
 319         packet_trace_identity("push");
 320         git_config(git_default_config, NULL);
 321         argc = parse_options(argc, argv, prefix, options, push_usage, 0);
 322
 323         if (deleterefs && (tags || (flags & (TRANSPORT_PUSH_ALL | TRANSPORT_PUSH_MIRROR))))
 324                 die(_("--delete is incompatible with --all, --mirror and --tags"));
 325         if (deleterefs && argc < 2)
 326                 die(_("--delete doesn't make sense without any refs"));
 327
 328         if (tags)
 329                 add_refspec("refs/tags/*");
 330
 331         if (argc > 0) {
 332                 repo = argv[0];
 333                 set_refspecs(argv + 1, argc - 1);
 334         }
 335
 336         rc = do_push(repo, flags);
 337         if (rc == -1)
 338                 usage_with_options(push_usage, options);
 339         else
 340                 return rc;
 341 }