Andrew's git / gitweb.git / builtin/push.c
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builtin / push.con commit Merge branch 'jk/format-patch-from' (22fcbc4)
   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
  13static const char * const push_usage[] = {
  14        N_("git push [<options>] [<repository> [<refspec>...]]"),
  15        NULL,
  16};
  17
  18static int thin;
  19static int deleterefs;
  20static const char *receivepack;
  21static int verbosity;
  22static int progress = -1;
  23
  24static const char **refspec;
  25static int refspec_nr;
  26static int refspec_alloc;
  27static int default_matching_used;
  28
  29static 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
  36static 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
  69static 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
  79static 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
 116static const char message_detached_head_die[] =
 117        N_("You are not currently on a branch.\n"
 118           "To push the history leading to the current (detached HEAD)\n"
 119           "state now, use\n"
 120           "\n"
 121           "    git push %s HEAD:<name-of-remote-branch>\n");
 122
 123static void setup_push_upstream(struct remote *remote, struct branch *branch,
 124                                int triangular)
 125{
 126        struct strbuf refspec = STRBUF_INIT;
 127
 128        if (!branch)
 129                die(_(message_detached_head_die), remote->name);
 130        if (!branch->merge_nr || !branch->merge || !branch->remote_name)
 131                die(_("The current branch %s has no upstream branch.\n"
 132                    "To push the current branch and set the remote as upstream, use\n"
 133                    "\n"
 134                    "    git push --set-upstream %s %s\n"),
 135                    branch->name,
 136                    remote->name,
 137                    branch->name);
 138        if (branch->merge_nr != 1)
 139                die(_("The current branch %s has multiple upstream branches, "
 140                    "refusing to push."), branch->name);
 141        if (triangular)
 142                die(_("You are pushing to remote '%s', which is not the upstream of\n"
 143                      "your current branch '%s', without telling me what to push\n"
 144                      "to update which remote branch."),
 145                    remote->name, branch->name);
 146
 147        if (push_default == PUSH_DEFAULT_SIMPLE) {
 148                /* Additional safety */
 149                if (strcmp(branch->refname, branch->merge[0]->src))
 150                        die_push_simple(branch, remote);
 151        }
 152
 153        strbuf_addf(&refspec, "%s:%s", branch->name, branch->merge[0]->src);
 154        add_refspec(refspec.buf);
 155}
 156
 157static void setup_push_current(struct remote *remote, struct branch *branch)
 158{
 159        if (!branch)
 160                die(_(message_detached_head_die), remote->name);
 161        add_refspec(branch->name);
 162}
 163
 164static char warn_unspecified_push_default_msg[] =
 165N_("push.default is unset; its implicit value is changing in\n"
 166   "Git 2.0 from 'matching' to 'simple'. To squelch this message\n"
 167   "and maintain the current behavior after the default changes, use:\n"
 168   "\n"
 169   "  git config --global push.default matching\n"
 170   "\n"
 171   "To squelch this message and adopt the new behavior now, use:\n"
 172   "\n"
 173   "  git config --global push.default simple\n"
 174   "\n"
 175   "See 'git help config' and search for 'push.default' for further information.\n"
 176   "(the 'simple' mode was introduced in Git 1.7.11. Use the similar mode\n"
 177   "'current' instead of 'simple' if you sometimes use older versions of Git)");
 178
 179static void warn_unspecified_push_default_configuration(void)
 180{
 181        static int warn_once;
 182
 183        if (warn_once++)
 184                return;
 185        warning("%s\n", _(warn_unspecified_push_default_msg));
 186}
 187
 188static int is_workflow_triangular(struct remote *remote)
 189{
 190        struct remote *fetch_remote = remote_get(NULL);
 191        return (fetch_remote && fetch_remote != remote);
 192}
 193
 194static void setup_default_push_refspecs(struct remote *remote)
 195{
 196        struct branch *branch = branch_get(NULL);
 197        int triangular = is_workflow_triangular(remote);
 198
 199        switch (push_default) {
 200        default:
 201        case PUSH_DEFAULT_UNSPECIFIED:
 202                default_matching_used = 1;
 203                warn_unspecified_push_default_configuration();
 204                /* fallthru */
 205        case PUSH_DEFAULT_MATCHING:
 206                add_refspec(":");
 207                break;
 208
 209        case PUSH_DEFAULT_SIMPLE:
 210                if (triangular)
 211                        setup_push_current(remote, branch);
 212                else
 213                        setup_push_upstream(remote, branch, triangular);
 214                break;
 215
 216        case PUSH_DEFAULT_UPSTREAM:
 217                setup_push_upstream(remote, branch, triangular);
 218                break;
 219
 220        case PUSH_DEFAULT_CURRENT:
 221                setup_push_current(remote, branch);
 222                break;
 223
 224        case PUSH_DEFAULT_NOTHING:
 225                die(_("You didn't specify any refspecs to push, and "
 226                    "push.default is \"nothing\"."));
 227                break;
 228        }
 229}
 230
 231static const char message_advice_pull_before_push[] =
 232        N_("Updates were rejected because the tip of your current branch is behind\n"
 233           "its remote counterpart. Integrate the remote changes (e.g.\n"
 234           "'git pull ...') before pushing again.\n"
 235           "See the 'Note about fast-forwards' in 'git push --help' for details.");
 236
 237static const char message_advice_use_upstream[] =
 238        N_("Updates were rejected because a pushed branch tip is behind its remote\n"
 239           "counterpart. If you did not intend to push that branch, you may want to\n"
 240           "specify branches to push or set the 'push.default' configuration variable\n"
 241           "to 'simple', 'current' or 'upstream' to push only the current branch.");
 242
 243static const char message_advice_checkout_pull_push[] =
 244        N_("Updates were rejected because a pushed branch tip is behind its remote\n"
 245           "counterpart. Check out this branch and integrate the remote changes\n"
 246           "(e.g. 'git pull ...') before pushing again.\n"
 247           "See the 'Note about fast-forwards' in 'git push --help' for details.");
 248
 249static const char message_advice_ref_fetch_first[] =
 250        N_("Updates were rejected because the remote contains work that you do\n"
 251           "not have locally. This is usually caused by another repository pushing\n"
 252           "to the same ref. You may want to first integrate the remote changes\n"
 253           "(e.g., 'git pull ...') before pushing again.\n"
 254           "See the 'Note about fast-forwards' in 'git push --help' for details.");
 255
 256static const char message_advice_ref_already_exists[] =
 257        N_("Updates were rejected because the tag already exists in the remote.");
 258
 259static const char message_advice_ref_needs_force[] =
 260        N_("You cannot update a remote ref that points at a non-commit object,\n"
 261           "or update a remote ref to make it point at a non-commit object,\n"
 262           "without using the '--force' option.\n");
 263
 264static void advise_pull_before_push(void)
 265{
 266        if (!advice_push_non_ff_current || !advice_push_update_rejected)
 267                return;
 268        advise(_(message_advice_pull_before_push));
 269}
 270
 271static void advise_use_upstream(void)
 272{
 273        if (!advice_push_non_ff_default || !advice_push_update_rejected)
 274                return;
 275        advise(_(message_advice_use_upstream));
 276}
 277
 278static void advise_checkout_pull_push(void)
 279{
 280        if (!advice_push_non_ff_matching || !advice_push_update_rejected)
 281                return;
 282        advise(_(message_advice_checkout_pull_push));
 283}
 284
 285static void advise_ref_already_exists(void)
 286{
 287        if (!advice_push_already_exists || !advice_push_update_rejected)
 288                return;
 289        advise(_(message_advice_ref_already_exists));
 290}
 291
 292static void advise_ref_fetch_first(void)
 293{
 294        if (!advice_push_fetch_first || !advice_push_update_rejected)
 295                return;
 296        advise(_(message_advice_ref_fetch_first));
 297}
 298
 299static void advise_ref_needs_force(void)
 300{
 301        if (!advice_push_needs_force || !advice_push_update_rejected)
 302                return;
 303        advise(_(message_advice_ref_needs_force));
 304}
 305
 306static int push_with_options(struct transport *transport, int flags)
 307{
 308        int err;
 309        unsigned int reject_reasons;
 310
 311        transport_set_verbosity(transport, verbosity, progress);
 312
 313        if (receivepack)
 314                transport_set_option(transport,
 315                                     TRANS_OPT_RECEIVEPACK, receivepack);
 316        if (thin)
 317                transport_set_option(transport, TRANS_OPT_THIN, "yes");
 318
 319        if (verbosity > 0)
 320                fprintf(stderr, _("Pushing to %s\n"), transport->url);
 321        err = transport_push(transport, refspec_nr, refspec, flags,
 322                             &reject_reasons);
 323        if (err != 0)
 324                error(_("failed to push some refs to '%s'"), transport->url);
 325
 326        err |= transport_disconnect(transport);
 327        if (!err)
 328                return 0;
 329
 330        if (reject_reasons & REJECT_NON_FF_HEAD) {
 331                advise_pull_before_push();
 332        } else if (reject_reasons & REJECT_NON_FF_OTHER) {
 333                if (default_matching_used)
 334                        advise_use_upstream();
 335                else
 336                        advise_checkout_pull_push();
 337        } else if (reject_reasons & REJECT_ALREADY_EXISTS) {
 338                advise_ref_already_exists();
 339        } else if (reject_reasons & REJECT_FETCH_FIRST) {
 340                advise_ref_fetch_first();
 341        } else if (reject_reasons & REJECT_NEEDS_FORCE) {
 342                advise_ref_needs_force();
 343        }
 344
 345        return 1;
 346}
 347
 348static int do_push(const char *repo, int flags)
 349{
 350        int i, errs;
 351        struct remote *remote = pushremote_get(repo);
 352        const char **url;
 353        int url_nr;
 354
 355        if (!remote) {
 356                if (repo)
 357                        die(_("bad repository '%s'"), repo);
 358                die(_("No configured push destination.\n"
 359                    "Either specify the URL from the command-line or configure a remote repository using\n"
 360                    "\n"
 361                    "    git remote add <name> <url>\n"
 362                    "\n"
 363                    "and then push using the remote name\n"
 364                    "\n"
 365                    "    git push <name>\n"));
 366        }
 367
 368        if (remote->mirror)
 369                flags |= (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE);
 370
 371        if ((flags & TRANSPORT_PUSH_ALL) && refspec) {
 372                if (!strcmp(*refspec, "refs/tags/*"))
 373                        return error(_("--all and --tags are incompatible"));
 374                return error(_("--all can't be combined with refspecs"));
 375        }
 376
 377        if ((flags & TRANSPORT_PUSH_MIRROR) && refspec) {
 378                if (!strcmp(*refspec, "refs/tags/*"))
 379                        return error(_("--mirror and --tags are incompatible"));
 380                return error(_("--mirror can't be combined with refspecs"));
 381        }
 382
 383        if ((flags & (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) ==
 384                                (TRANSPORT_PUSH_ALL|TRANSPORT_PUSH_MIRROR)) {
 385                return error(_("--all and --mirror are incompatible"));
 386        }
 387
 388        if (!refspec && !(flags & TRANSPORT_PUSH_ALL)) {
 389                if (remote->push_refspec_nr) {
 390                        refspec = remote->push_refspec;
 391                        refspec_nr = remote->push_refspec_nr;
 392                } else if (!(flags & TRANSPORT_PUSH_MIRROR))
 393                        setup_default_push_refspecs(remote);
 394        }
 395        errs = 0;
 396        url_nr = push_url_of_remote(remote, &url);
 397        if (url_nr) {
 398                for (i = 0; i < url_nr; i++) {
 399                        struct transport *transport =
 400                                transport_get(remote, url[i]);
 401                        if (push_with_options(transport, flags))
 402                                errs++;
 403                }
 404        } else {
 405                struct transport *transport =
 406                        transport_get(remote, NULL);
 407
 408                if (push_with_options(transport, flags))
 409                        errs++;
 410        }
 411        return !!errs;
 412}
 413
 414static int option_parse_recurse_submodules(const struct option *opt,
 415                                   const char *arg, int unset)
 416{
 417        int *flags = opt->value;
 418
 419        if (*flags & (TRANSPORT_RECURSE_SUBMODULES_CHECK |
 420                      TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND))
 421                die("%s can only be used once.", opt->long_name);
 422
 423        if (arg) {
 424                if (!strcmp(arg, "check"))
 425                        *flags |= TRANSPORT_RECURSE_SUBMODULES_CHECK;
 426                else if (!strcmp(arg, "on-demand"))
 427                        *flags |= TRANSPORT_RECURSE_SUBMODULES_ON_DEMAND;
 428                else
 429                        die("bad %s argument: %s", opt->long_name, arg);
 430        } else
 431                die("option %s needs an argument (check|on-demand)",
 432                                opt->long_name);
 433
 434        return 0;
 435}
 436
 437int cmd_push(int argc, const char **argv, const char *prefix)
 438{
 439        int flags = 0;
 440        int tags = 0;
 441        int rc;
 442        const char *repo = NULL;        /* default repository */
 443        struct option options[] = {
 444                OPT__VERBOSITY(&verbosity),
 445                OPT_STRING( 0 , "repo", &repo, N_("repository"), N_("repository")),
 446                OPT_BIT( 0 , "all", &flags, N_("push all refs"), TRANSPORT_PUSH_ALL),
 447                OPT_BIT( 0 , "mirror", &flags, N_("mirror all refs"),
 448                            (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE)),
 449                OPT_BOOLEAN( 0, "delete", &deleterefs, N_("delete refs")),
 450                OPT_BOOLEAN( 0 , "tags", &tags, N_("push tags (can't be used with --all or --mirror)")),
 451                OPT_BIT('n' , "dry-run", &flags, N_("dry run"), TRANSPORT_PUSH_DRY_RUN),
 452                OPT_BIT( 0,  "porcelain", &flags, N_("machine-readable output"), TRANSPORT_PUSH_PORCELAIN),
 453                OPT_BIT('f', "force", &flags, N_("force updates"), TRANSPORT_PUSH_FORCE),
 454                { OPTION_CALLBACK, 0, "recurse-submodules", &flags, N_("check"),
 455                        N_("control recursive pushing of submodules"),
 456                        PARSE_OPT_OPTARG, option_parse_recurse_submodules },
 457                OPT_BOOLEAN( 0 , "thin", &thin, N_("use thin pack")),
 458                OPT_STRING( 0 , "receive-pack", &receivepack, "receive-pack", N_("receive pack program")),
 459                OPT_STRING( 0 , "exec", &receivepack, "receive-pack", N_("receive pack program")),
 460                OPT_BIT('u', "set-upstream", &flags, N_("set upstream for git pull/status"),
 461                        TRANSPORT_PUSH_SET_UPSTREAM),
 462                OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
 463                OPT_BIT(0, "prune", &flags, N_("prune locally removed refs"),
 464                        TRANSPORT_PUSH_PRUNE),
 465                OPT_BIT(0, "no-verify", &flags, N_("bypass pre-push hook"), TRANSPORT_PUSH_NO_HOOK),
 466                OPT_BIT(0, "follow-tags", &flags, N_("push missing but relevant tags"),
 467                        TRANSPORT_PUSH_FOLLOW_TAGS),
 468                OPT_END()
 469        };
 470
 471        packet_trace_identity("push");
 472        git_config(git_default_config, NULL);
 473        argc = parse_options(argc, argv, prefix, options, push_usage, 0);
 474
 475        if (deleterefs && (tags || (flags & (TRANSPORT_PUSH_ALL | TRANSPORT_PUSH_MIRROR))))
 476                die(_("--delete is incompatible with --all, --mirror and --tags"));
 477        if (deleterefs && argc < 2)
 478                die(_("--delete doesn't make sense without any refs"));
 479
 480        if (tags)
 481                add_refspec("refs/tags/*");
 482
 483        if (argc > 0) {
 484                repo = argv[0];
 485                set_refspecs(argv + 1, argc - 1);
 486        }
 487
 488        rc = do_push(repo, flags);
 489        if (rc == -1)
 490                usage_with_options(push_usage, options);
 491        else
 492                return rc;
 493}