builtin / branch.con commit Sync with maint (e2d9c46)
   1/*
   2 * Builtin "git branch"
   3 *
   4 * Copyright (c) 2006 Kristian Høgsberg <krh@redhat.com>
   5 * Based on git-branch.sh by Junio C Hamano.
   6 */
   7
   8#include "cache.h"
   9#include "config.h"
  10#include "color.h"
  11#include "refs.h"
  12#include "commit.h"
  13#include "builtin.h"
  14#include "remote.h"
  15#include "parse-options.h"
  16#include "branch.h"
  17#include "diff.h"
  18#include "revision.h"
  19#include "string-list.h"
  20#include "column.h"
  21#include "utf8.h"
  22#include "wt-status.h"
  23#include "ref-filter.h"
  24#include "worktree.h"
  25
  26static const char * const builtin_branch_usage[] = {
  27        N_("git branch [<options>] [-r | -a] [--merged | --no-merged]"),
  28        N_("git branch [<options>] [-l] [-f] <branch-name> [<start-point>]"),
  29        N_("git branch [<options>] [-r] (-d | -D) <branch-name>..."),
  30        N_("git branch [<options>] (-m | -M) [<old-branch>] <new-branch>"),
  31        N_("git branch [<options>] [-r | -a] [--points-at]"),
  32        N_("git branch [<options>] [-r | -a] [--format]"),
  33        NULL
  34};
  35
  36static const char *head;
  37static struct object_id head_oid;
  38
  39static int branch_use_color = -1;
  40static char branch_colors[][COLOR_MAXLEN] = {
  41        GIT_COLOR_RESET,
  42        GIT_COLOR_NORMAL,       /* PLAIN */
  43        GIT_COLOR_RED,          /* REMOTE */
  44        GIT_COLOR_NORMAL,       /* LOCAL */
  45        GIT_COLOR_GREEN,        /* CURRENT */
  46        GIT_COLOR_BLUE,         /* UPSTREAM */
  47};
  48enum color_branch {
  49        BRANCH_COLOR_RESET = 0,
  50        BRANCH_COLOR_PLAIN = 1,
  51        BRANCH_COLOR_REMOTE = 2,
  52        BRANCH_COLOR_LOCAL = 3,
  53        BRANCH_COLOR_CURRENT = 4,
  54        BRANCH_COLOR_UPSTREAM = 5
  55};
  56
  57static struct string_list output = STRING_LIST_INIT_DUP;
  58static unsigned int colopts;
  59
  60static int parse_branch_color_slot(const char *slot)
  61{
  62        if (!strcasecmp(slot, "plain"))
  63                return BRANCH_COLOR_PLAIN;
  64        if (!strcasecmp(slot, "reset"))
  65                return BRANCH_COLOR_RESET;
  66        if (!strcasecmp(slot, "remote"))
  67                return BRANCH_COLOR_REMOTE;
  68        if (!strcasecmp(slot, "local"))
  69                return BRANCH_COLOR_LOCAL;
  70        if (!strcasecmp(slot, "current"))
  71                return BRANCH_COLOR_CURRENT;
  72        if (!strcasecmp(slot, "upstream"))
  73                return BRANCH_COLOR_UPSTREAM;
  74        return -1;
  75}
  76
  77static int git_branch_config(const char *var, const char *value, void *cb)
  78{
  79        const char *slot_name;
  80
  81        if (starts_with(var, "column."))
  82                return git_column_config(var, value, "branch", &colopts);
  83        if (!strcmp(var, "color.branch")) {
  84                branch_use_color = git_config_colorbool(var, value);
  85                return 0;
  86        }
  87        if (skip_prefix(var, "color.branch.", &slot_name)) {
  88                int slot = parse_branch_color_slot(slot_name);
  89                if (slot < 0)
  90                        return 0;
  91                if (!value)
  92                        return config_error_nonbool(var);
  93                return color_parse(value, branch_colors[slot]);
  94        }
  95        return git_color_default_config(var, value, cb);
  96}
  97
  98static const char *branch_get_color(enum color_branch ix)
  99{
 100        if (want_color(branch_use_color))
 101                return branch_colors[ix];
 102        return "";
 103}
 104
 105static int branch_merged(int kind, const char *name,
 106                         struct commit *rev, struct commit *head_rev)
 107{
 108        /*
 109         * This checks whether the merge bases of branch and HEAD (or
 110         * the other branch this branch builds upon) contains the
 111         * branch, which means that the branch has already been merged
 112         * safely to HEAD (or the other branch).
 113         */
 114        struct commit *reference_rev = NULL;
 115        const char *reference_name = NULL;
 116        void *reference_name_to_free = NULL;
 117        int merged;
 118
 119        if (kind == FILTER_REFS_BRANCHES) {
 120                struct branch *branch = branch_get(name);
 121                const char *upstream = branch_get_upstream(branch, NULL);
 122                struct object_id oid;
 123
 124                if (upstream &&
 125                    (reference_name = reference_name_to_free =
 126                     resolve_refdup(upstream, RESOLVE_REF_READING,
 127                                    oid.hash, NULL)) != NULL)
 128                        reference_rev = lookup_commit_reference(&oid);
 129        }
 130        if (!reference_rev)
 131                reference_rev = head_rev;
 132
 133        merged = in_merge_bases(rev, reference_rev);
 134
 135        /*
 136         * After the safety valve is fully redefined to "check with
 137         * upstream, if any, otherwise with HEAD", we should just
 138         * return the result of the in_merge_bases() above without
 139         * any of the following code, but during the transition period,
 140         * a gentle reminder is in order.
 141         */
 142        if ((head_rev != reference_rev) &&
 143            in_merge_bases(rev, head_rev) != merged) {
 144                if (merged)
 145                        warning(_("deleting branch '%s' that has been merged to\n"
 146                                "         '%s', but not yet merged to HEAD."),
 147                                name, reference_name);
 148                else
 149                        warning(_("not deleting branch '%s' that is not yet merged to\n"
 150                                "         '%s', even though it is merged to HEAD."),
 151                                name, reference_name);
 152        }
 153        free(reference_name_to_free);
 154        return merged;
 155}
 156
 157static int check_branch_commit(const char *branchname, const char *refname,
 158                               const struct object_id *oid, struct commit *head_rev,
 159                               int kinds, int force)
 160{
 161        struct commit *rev = lookup_commit_reference(oid);
 162        if (!rev) {
 163                error(_("Couldn't look up commit object for '%s'"), refname);
 164                return -1;
 165        }
 166        if (!force && !branch_merged(kinds, branchname, rev, head_rev)) {
 167                error(_("The branch '%s' is not fully merged.\n"
 168                      "If you are sure you want to delete it, "
 169                      "run 'git branch -D %s'."), branchname, branchname);
 170                return -1;
 171        }
 172        return 0;
 173}
 174
 175static void delete_branch_config(const char *branchname)
 176{
 177        struct strbuf buf = STRBUF_INIT;
 178        strbuf_addf(&buf, "branch.%s", branchname);
 179        if (git_config_rename_section(buf.buf, NULL) < 0)
 180                warning(_("Update of config-file failed"));
 181        strbuf_release(&buf);
 182}
 183
 184static int delete_branches(int argc, const char **argv, int force, int kinds,
 185                           int quiet)
 186{
 187        struct commit *head_rev = NULL;
 188        struct object_id oid;
 189        char *name = NULL;
 190        const char *fmt;
 191        int i;
 192        int ret = 0;
 193        int remote_branch = 0;
 194        struct strbuf bname = STRBUF_INIT;
 195        unsigned allowed_interpret;
 196
 197        switch (kinds) {
 198        case FILTER_REFS_REMOTES:
 199                fmt = "refs/remotes/%s";
 200                /* For subsequent UI messages */
 201                remote_branch = 1;
 202                allowed_interpret = INTERPRET_BRANCH_REMOTE;
 203
 204                force = 1;
 205                break;
 206        case FILTER_REFS_BRANCHES:
 207                fmt = "refs/heads/%s";
 208                allowed_interpret = INTERPRET_BRANCH_LOCAL;
 209                break;
 210        default:
 211                die(_("cannot use -a with -d"));
 212        }
 213
 214        if (!force) {
 215                head_rev = lookup_commit_reference(&head_oid);
 216                if (!head_rev)
 217                        die(_("Couldn't look up commit object for HEAD"));
 218        }
 219        for (i = 0; i < argc; i++, strbuf_release(&bname)) {
 220                char *target = NULL;
 221                int flags = 0;
 222
 223                strbuf_branchname(&bname, argv[i], allowed_interpret);
 224                free(name);
 225                name = mkpathdup(fmt, bname.buf);
 226
 227                if (kinds == FILTER_REFS_BRANCHES) {
 228                        const struct worktree *wt =
 229                                find_shared_symref("HEAD", name);
 230                        if (wt) {
 231                                error(_("Cannot delete branch '%s' "
 232                                        "checked out at '%s'"),
 233                                      bname.buf, wt->path);
 234                                ret = 1;
 235                                continue;
 236                        }
 237                }
 238
 239                target = resolve_refdup(name,
 240                                        RESOLVE_REF_READING
 241                                        | RESOLVE_REF_NO_RECURSE
 242                                        | RESOLVE_REF_ALLOW_BAD_NAME,
 243                                        oid.hash, &flags);
 244                if (!target) {
 245                        error(remote_branch
 246                              ? _("remote-tracking branch '%s' not found.")
 247                              : _("branch '%s' not found."), bname.buf);
 248                        ret = 1;
 249                        continue;
 250                }
 251
 252                if (!(flags & (REF_ISSYMREF|REF_ISBROKEN)) &&
 253                    check_branch_commit(bname.buf, name, &oid, head_rev, kinds,
 254                                        force)) {
 255                        ret = 1;
 256                        goto next;
 257                }
 258
 259                if (delete_ref(NULL, name, is_null_oid(&oid) ? NULL : oid.hash,
 260                               REF_NODEREF)) {
 261                        error(remote_branch
 262                              ? _("Error deleting remote-tracking branch '%s'")
 263                              : _("Error deleting branch '%s'"),
 264                              bname.buf);
 265                        ret = 1;
 266                        goto next;
 267                }
 268                if (!quiet) {
 269                        printf(remote_branch
 270                               ? _("Deleted remote-tracking branch %s (was %s).\n")
 271                               : _("Deleted branch %s (was %s).\n"),
 272                               bname.buf,
 273                               (flags & REF_ISBROKEN) ? "broken"
 274                               : (flags & REF_ISSYMREF) ? target
 275                               : find_unique_abbrev(oid.hash, DEFAULT_ABBREV));
 276                }
 277                delete_branch_config(bname.buf);
 278
 279        next:
 280                free(target);
 281        }
 282
 283        free(name);
 284
 285        return(ret);
 286}
 287
 288static int calc_maxwidth(struct ref_array *refs, int remote_bonus)
 289{
 290        int i, max = 0;
 291        for (i = 0; i < refs->nr; i++) {
 292                struct ref_array_item *it = refs->items[i];
 293                const char *desc = it->refname;
 294                int w;
 295
 296                skip_prefix(it->refname, "refs/heads/", &desc);
 297                skip_prefix(it->refname, "refs/remotes/", &desc);
 298                if (it->kind == FILTER_REFS_DETACHED_HEAD) {
 299                        char *head_desc = get_head_description();
 300                        w = utf8_strwidth(head_desc);
 301                        free(head_desc);
 302                } else
 303                        w = utf8_strwidth(desc);
 304
 305                if (it->kind == FILTER_REFS_REMOTES)
 306                        w += remote_bonus;
 307                if (w > max)
 308                        max = w;
 309        }
 310        return max;
 311}
 312
 313static const char *quote_literal_for_format(const char *s)
 314{
 315        static struct strbuf buf = STRBUF_INIT;
 316
 317        strbuf_reset(&buf);
 318        while (*s) {
 319                const char *ep = strchrnul(s, '%');
 320                if (s < ep)
 321                        strbuf_add(&buf, s, ep - s);
 322                if (*ep == '%') {
 323                        strbuf_addstr(&buf, "%%");
 324                        s = ep + 1;
 325                } else {
 326                        s = ep;
 327                }
 328        }
 329        return buf.buf;
 330}
 331
 332static char *build_format(struct ref_filter *filter, int maxwidth, const char *remote_prefix)
 333{
 334        struct strbuf fmt = STRBUF_INIT;
 335        struct strbuf local = STRBUF_INIT;
 336        struct strbuf remote = STRBUF_INIT;
 337
 338        strbuf_addf(&local, "%%(if)%%(HEAD)%%(then)* %s%%(else)  %s%%(end)",
 339                    branch_get_color(BRANCH_COLOR_CURRENT),
 340                    branch_get_color(BRANCH_COLOR_LOCAL));
 341        strbuf_addf(&remote, "  %s",
 342                    branch_get_color(BRANCH_COLOR_REMOTE));
 343
 344        if (filter->verbose) {
 345                struct strbuf obname = STRBUF_INIT;
 346
 347                if (filter->abbrev < 0)
 348                        strbuf_addf(&obname, "%%(objectname:short)");
 349                else if (!filter->abbrev)
 350                        strbuf_addf(&obname, "%%(objectname)");
 351                else
 352                        strbuf_addf(&obname, "%%(objectname:short=%d)", filter->abbrev);
 353
 354                strbuf_addf(&local, "%%(align:%d,left)%%(refname:lstrip=2)%%(end)", maxwidth);
 355                strbuf_addf(&local, "%s", branch_get_color(BRANCH_COLOR_RESET));
 356                strbuf_addf(&local, " %s ", obname.buf);
 357
 358                if (filter->verbose > 1)
 359                        strbuf_addf(&local, "%%(if)%%(upstream)%%(then)[%s%%(upstream:short)%s%%(if)%%(upstream:track)"
 360                                    "%%(then): %%(upstream:track,nobracket)%%(end)] %%(end)%%(contents:subject)",
 361                                    branch_get_color(BRANCH_COLOR_UPSTREAM), branch_get_color(BRANCH_COLOR_RESET));
 362                else
 363                        strbuf_addf(&local, "%%(if)%%(upstream:track)%%(then)%%(upstream:track) %%(end)%%(contents:subject)");
 364
 365                strbuf_addf(&remote, "%%(align:%d,left)%s%%(refname:lstrip=2)%%(end)%s"
 366                            "%%(if)%%(symref)%%(then) -> %%(symref:short)"
 367                            "%%(else) %s %%(contents:subject)%%(end)",
 368                            maxwidth, quote_literal_for_format(remote_prefix),
 369                            branch_get_color(BRANCH_COLOR_RESET), obname.buf);
 370                strbuf_release(&obname);
 371        } else {
 372                strbuf_addf(&local, "%%(refname:lstrip=2)%s%%(if)%%(symref)%%(then) -> %%(symref:short)%%(end)",
 373                            branch_get_color(BRANCH_COLOR_RESET));
 374                strbuf_addf(&remote, "%s%%(refname:lstrip=2)%s%%(if)%%(symref)%%(then) -> %%(symref:short)%%(end)",
 375                            quote_literal_for_format(remote_prefix),
 376                            branch_get_color(BRANCH_COLOR_RESET));
 377        }
 378
 379        strbuf_addf(&fmt, "%%(if:notequals=refs/remotes)%%(refname:rstrip=-2)%%(then)%s%%(else)%s%%(end)", local.buf, remote.buf);
 380
 381        strbuf_release(&local);
 382        strbuf_release(&remote);
 383        return strbuf_detach(&fmt, NULL);
 384}
 385
 386static void print_ref_list(struct ref_filter *filter, struct ref_sorting *sorting, const char *format)
 387{
 388        int i;
 389        struct ref_array array;
 390        int maxwidth = 0;
 391        const char *remote_prefix = "";
 392        struct strbuf out = STRBUF_INIT;
 393        char *to_free = NULL;
 394
 395        /*
 396         * If we are listing more than just remote branches,
 397         * then remote branches will have a "remotes/" prefix.
 398         * We need to account for this in the width.
 399         */
 400        if (filter->kind != FILTER_REFS_REMOTES)
 401                remote_prefix = "remotes/";
 402
 403        memset(&array, 0, sizeof(array));
 404
 405        filter_refs(&array, filter, filter->kind | FILTER_REFS_INCLUDE_BROKEN);
 406
 407        if (filter->verbose)
 408                maxwidth = calc_maxwidth(&array, strlen(remote_prefix));
 409
 410        if (!format)
 411                format = to_free = build_format(filter, maxwidth, remote_prefix);
 412        verify_ref_format(format);
 413
 414        ref_array_sort(sorting, &array);
 415
 416        for (i = 0; i < array.nr; i++) {
 417                format_ref_array_item(array.items[i], format, 0, &out);
 418                if (column_active(colopts)) {
 419                        assert(!filter->verbose && "--column and --verbose are incompatible");
 420                         /* format to a string_list to let print_columns() do its job */
 421                        string_list_append(&output, out.buf);
 422                } else {
 423                        fwrite(out.buf, 1, out.len, stdout);
 424                        putchar('\n');
 425                }
 426                strbuf_release(&out);
 427        }
 428
 429        ref_array_clear(&array);
 430        free(to_free);
 431}
 432
 433static void reject_rebase_or_bisect_branch(const char *target)
 434{
 435        struct worktree **worktrees = get_worktrees(0);
 436        int i;
 437
 438        for (i = 0; worktrees[i]; i++) {
 439                struct worktree *wt = worktrees[i];
 440
 441                if (!wt->is_detached)
 442                        continue;
 443
 444                if (is_worktree_being_rebased(wt, target))
 445                        die(_("Branch %s is being rebased at %s"),
 446                            target, wt->path);
 447
 448                if (is_worktree_being_bisected(wt, target))
 449                        die(_("Branch %s is being bisected at %s"),
 450                            target, wt->path);
 451        }
 452
 453        free_worktrees(worktrees);
 454}
 455
 456static void rename_branch(const char *oldname, const char *newname, int force)
 457{
 458        struct strbuf oldref = STRBUF_INIT, newref = STRBUF_INIT, logmsg = STRBUF_INIT;
 459        struct strbuf oldsection = STRBUF_INIT, newsection = STRBUF_INIT;
 460        int recovery = 0;
 461        int clobber_head_ok;
 462
 463        if (!oldname)
 464                die(_("cannot rename the current branch while not on any."));
 465
 466        if (strbuf_check_branch_ref(&oldref, oldname)) {
 467                /*
 468                 * Bad name --- this could be an attempt to rename a
 469                 * ref that we used to allow to be created by accident.
 470                 */
 471                if (ref_exists(oldref.buf))
 472                        recovery = 1;
 473                else
 474                        die(_("Invalid branch name: '%s'"), oldname);
 475        }
 476
 477        /*
 478         * A command like "git branch -M currentbranch currentbranch" cannot
 479         * cause the worktree to become inconsistent with HEAD, so allow it.
 480         */
 481        clobber_head_ok = !strcmp(oldname, newname);
 482
 483        validate_new_branchname(newname, &newref, force, clobber_head_ok);
 484
 485        reject_rebase_or_bisect_branch(oldref.buf);
 486
 487        strbuf_addf(&logmsg, "Branch: renamed %s to %s",
 488                 oldref.buf, newref.buf);
 489
 490        if (rename_ref(oldref.buf, newref.buf, logmsg.buf))
 491                die(_("Branch rename failed"));
 492
 493        if (recovery)
 494                warning(_("Renamed a misnamed branch '%s' away"), oldref.buf + 11);
 495
 496        if (replace_each_worktree_head_symref(oldref.buf, newref.buf, logmsg.buf))
 497                die(_("Branch renamed to %s, but HEAD is not updated!"), newname);
 498
 499        strbuf_release(&logmsg);
 500
 501        strbuf_addf(&oldsection, "branch.%s", oldref.buf + 11);
 502        strbuf_release(&oldref);
 503        strbuf_addf(&newsection, "branch.%s", newref.buf + 11);
 504        strbuf_release(&newref);
 505        if (git_config_rename_section(oldsection.buf, newsection.buf) < 0)
 506                die(_("Branch is renamed, but update of config-file failed"));
 507        strbuf_release(&oldsection);
 508        strbuf_release(&newsection);
 509}
 510
 511static GIT_PATH_FUNC(edit_description, "EDIT_DESCRIPTION")
 512
 513static int edit_branch_description(const char *branch_name)
 514{
 515        struct strbuf buf = STRBUF_INIT;
 516        struct strbuf name = STRBUF_INIT;
 517
 518        read_branch_desc(&buf, branch_name);
 519        if (!buf.len || buf.buf[buf.len-1] != '\n')
 520                strbuf_addch(&buf, '\n');
 521        strbuf_commented_addf(&buf,
 522                    _("Please edit the description for the branch\n"
 523                      "  %s\n"
 524                      "Lines starting with '%c' will be stripped.\n"),
 525                    branch_name, comment_line_char);
 526        write_file_buf(edit_description(), buf.buf, buf.len);
 527        strbuf_reset(&buf);
 528        if (launch_editor(edit_description(), &buf, NULL)) {
 529                strbuf_release(&buf);
 530                return -1;
 531        }
 532        strbuf_stripspace(&buf, 1);
 533
 534        strbuf_addf(&name, "branch.%s.description", branch_name);
 535        git_config_set(name.buf, buf.len ? buf.buf : NULL);
 536        strbuf_release(&name);
 537        strbuf_release(&buf);
 538
 539        return 0;
 540}
 541
 542int cmd_branch(int argc, const char **argv, const char *prefix)
 543{
 544        int delete = 0, rename = 0, force = 0, list = 0;
 545        int reflog = 0, edit_description = 0;
 546        int quiet = 0, unset_upstream = 0;
 547        const char *new_upstream = NULL;
 548        enum branch_track track;
 549        struct ref_filter filter;
 550        int icase = 0;
 551        static struct ref_sorting *sorting = NULL, **sorting_tail = &sorting;
 552        const char *format = NULL;
 553
 554        struct option options[] = {
 555                OPT_GROUP(N_("Generic options")),
 556                OPT__VERBOSE(&filter.verbose,
 557                        N_("show hash and subject, give twice for upstream branch")),
 558                OPT__QUIET(&quiet, N_("suppress informational messages")),
 559                OPT_SET_INT('t', "track",  &track, N_("set up tracking mode (see git-pull(1))"),
 560                        BRANCH_TRACK_EXPLICIT),
 561                OPT_SET_INT( 0, "set-upstream",  &track, N_("change upstream info"),
 562                        BRANCH_TRACK_OVERRIDE),
 563                OPT_STRING('u', "set-upstream-to", &new_upstream, N_("upstream"), N_("change the upstream info")),
 564                OPT_BOOL(0, "unset-upstream", &unset_upstream, N_("Unset the upstream info")),
 565                OPT__COLOR(&branch_use_color, N_("use colored output")),
 566                OPT_SET_INT('r', "remotes",     &filter.kind, N_("act on remote-tracking branches"),
 567                        FILTER_REFS_REMOTES),
 568                OPT_CONTAINS(&filter.with_commit, N_("print only branches that contain the commit")),
 569                OPT_NO_CONTAINS(&filter.no_commit, N_("print only branches that don't contain the commit")),
 570                OPT_WITH(&filter.with_commit, N_("print only branches that contain the commit")),
 571                OPT_WITHOUT(&filter.no_commit, N_("print only branches that don't contain the commit")),
 572                OPT__ABBREV(&filter.abbrev),
 573
 574                OPT_GROUP(N_("Specific git-branch actions:")),
 575                OPT_SET_INT('a', "all", &filter.kind, N_("list both remote-tracking and local branches"),
 576                        FILTER_REFS_REMOTES | FILTER_REFS_BRANCHES),
 577                OPT_BIT('d', "delete", &delete, N_("delete fully merged branch"), 1),
 578                OPT_BIT('D', NULL, &delete, N_("delete branch (even if not merged)"), 2),
 579                OPT_BIT('m', "move", &rename, N_("move/rename a branch and its reflog"), 1),
 580                OPT_BIT('M', NULL, &rename, N_("move/rename a branch, even if target exists"), 2),
 581                OPT_BOOL(0, "list", &list, N_("list branch names")),
 582                OPT_BOOL('l', "create-reflog", &reflog, N_("create the branch's reflog")),
 583                OPT_BOOL(0, "edit-description", &edit_description,
 584                         N_("edit the description for the branch")),
 585                OPT__FORCE(&force, N_("force creation, move/rename, deletion")),
 586                OPT_MERGED(&filter, N_("print only branches that are merged")),
 587                OPT_NO_MERGED(&filter, N_("print only branches that are not merged")),
 588                OPT_COLUMN(0, "column", &colopts, N_("list branches in columns")),
 589                OPT_CALLBACK(0 , "sort", sorting_tail, N_("key"),
 590                             N_("field name to sort on"), &parse_opt_ref_sorting),
 591                {
 592                        OPTION_CALLBACK, 0, "points-at", &filter.points_at, N_("object"),
 593                        N_("print only branches of the object"), 0, parse_opt_object_name
 594                },
 595                OPT_BOOL('i', "ignore-case", &icase, N_("sorting and filtering are case insensitive")),
 596                OPT_STRING(  0 , "format", &format, N_("format"), N_("format to use for the output")),
 597                OPT_END(),
 598        };
 599
 600        setup_ref_filter_porcelain_msg();
 601
 602        memset(&filter, 0, sizeof(filter));
 603        filter.kind = FILTER_REFS_BRANCHES;
 604        filter.abbrev = -1;
 605
 606        if (argc == 2 && !strcmp(argv[1], "-h"))
 607                usage_with_options(builtin_branch_usage, options);
 608
 609        git_config(git_branch_config, NULL);
 610
 611        track = git_branch_track;
 612
 613        head = resolve_refdup("HEAD", 0, head_oid.hash, NULL);
 614        if (!head)
 615                die(_("Failed to resolve HEAD as a valid ref."));
 616        if (!strcmp(head, "HEAD"))
 617                filter.detached = 1;
 618        else if (!skip_prefix(head, "refs/heads/", &head))
 619                die(_("HEAD not found below refs/heads!"));
 620
 621        argc = parse_options(argc, argv, prefix, options, builtin_branch_usage,
 622                             0);
 623
 624        if (!delete && !rename && !edit_description && !new_upstream && !unset_upstream && argc == 0)
 625                list = 1;
 626
 627        if (filter.with_commit || filter.merge != REF_FILTER_MERGED_NONE || filter.points_at.nr ||
 628            filter.no_commit)
 629                list = 1;
 630
 631        if (!!delete + !!rename + !!new_upstream +
 632            list + unset_upstream > 1)
 633                usage_with_options(builtin_branch_usage, options);
 634
 635        if (filter.abbrev == -1)
 636                filter.abbrev = DEFAULT_ABBREV;
 637        filter.ignore_case = icase;
 638
 639        finalize_colopts(&colopts, -1);
 640        if (filter.verbose) {
 641                if (explicitly_enable_column(colopts))
 642                        die(_("--column and --verbose are incompatible"));
 643                colopts = 0;
 644        }
 645
 646        if (force) {
 647                delete *= 2;
 648                rename *= 2;
 649        }
 650
 651        if (delete) {
 652                if (!argc)
 653                        die(_("branch name required"));
 654                return delete_branches(argc, argv, delete > 1, filter.kind, quiet);
 655        } else if (list) {
 656                /*  git branch --local also shows HEAD when it is detached */
 657                if ((filter.kind & FILTER_REFS_BRANCHES) && filter.detached)
 658                        filter.kind |= FILTER_REFS_DETACHED_HEAD;
 659                filter.name_patterns = argv;
 660                /*
 661                 * If no sorting parameter is given then we default to sorting
 662                 * by 'refname'. This would give us an alphabetically sorted
 663                 * array with the 'HEAD' ref at the beginning followed by
 664                 * local branches 'refs/heads/...' and finally remote-tacking
 665                 * branches 'refs/remotes/...'.
 666                 */
 667                if (!sorting)
 668                        sorting = ref_default_sorting();
 669                sorting->ignore_case = icase;
 670                print_ref_list(&filter, sorting, format);
 671                print_columns(&output, colopts, NULL);
 672                string_list_clear(&output, 0);
 673                return 0;
 674        }
 675        else if (edit_description) {
 676                const char *branch_name;
 677                struct strbuf branch_ref = STRBUF_INIT;
 678
 679                if (!argc) {
 680                        if (filter.detached)
 681                                die(_("Cannot give description to detached HEAD"));
 682                        branch_name = head;
 683                } else if (argc == 1)
 684                        branch_name = argv[0];
 685                else
 686                        die(_("cannot edit description of more than one branch"));
 687
 688                strbuf_addf(&branch_ref, "refs/heads/%s", branch_name);
 689                if (!ref_exists(branch_ref.buf)) {
 690                        strbuf_release(&branch_ref);
 691
 692                        if (!argc)
 693                                return error(_("No commit on branch '%s' yet."),
 694                                             branch_name);
 695                        else
 696                                return error(_("No branch named '%s'."),
 697                                             branch_name);
 698                }
 699                strbuf_release(&branch_ref);
 700
 701                if (edit_branch_description(branch_name))
 702                        return 1;
 703        } else if (rename) {
 704                if (!argc)
 705                        die(_("branch name required"));
 706                else if (argc == 1)
 707                        rename_branch(head, argv[0], rename > 1);
 708                else if (argc == 2)
 709                        rename_branch(argv[0], argv[1], rename > 1);
 710                else
 711                        die(_("too many branches for a rename operation"));
 712        } else if (new_upstream) {
 713                struct branch *branch = branch_get(argv[0]);
 714
 715                if (argc > 1)
 716                        die(_("too many branches to set new upstream"));
 717
 718                if (!branch) {
 719                        if (!argc || !strcmp(argv[0], "HEAD"))
 720                                die(_("could not set upstream of HEAD to %s when "
 721                                      "it does not point to any branch."),
 722                                    new_upstream);
 723                        die(_("no such branch '%s'"), argv[0]);
 724                }
 725
 726                if (!ref_exists(branch->refname))
 727                        die(_("branch '%s' does not exist"), branch->name);
 728
 729                /*
 730                 * create_branch takes care of setting up the tracking
 731                 * info and making sure new_upstream is correct
 732                 */
 733                create_branch(branch->name, new_upstream, 0, 0, 0, quiet, BRANCH_TRACK_OVERRIDE);
 734        } else if (unset_upstream) {
 735                struct branch *branch = branch_get(argv[0]);
 736                struct strbuf buf = STRBUF_INIT;
 737
 738                if (argc > 1)
 739                        die(_("too many branches to unset upstream"));
 740
 741                if (!branch) {
 742                        if (!argc || !strcmp(argv[0], "HEAD"))
 743                                die(_("could not unset upstream of HEAD when "
 744                                      "it does not point to any branch."));
 745                        die(_("no such branch '%s'"), argv[0]);
 746                }
 747
 748                if (!branch_has_merge_config(branch))
 749                        die(_("Branch '%s' has no upstream information"), branch->name);
 750
 751                strbuf_addf(&buf, "branch.%s.remote", branch->name);
 752                git_config_set_multivar(buf.buf, NULL, NULL, 1);
 753                strbuf_reset(&buf);
 754                strbuf_addf(&buf, "branch.%s.merge", branch->name);
 755                git_config_set_multivar(buf.buf, NULL, NULL, 1);
 756                strbuf_release(&buf);
 757        } else if (argc > 0 && argc <= 2) {
 758                struct branch *branch = branch_get(argv[0]);
 759                int branch_existed = 0, remote_tracking = 0;
 760                struct strbuf buf = STRBUF_INIT;
 761
 762                if (!strcmp(argv[0], "HEAD"))
 763                        die(_("it does not make sense to create 'HEAD' manually"));
 764
 765                if (!branch)
 766                        die(_("no such branch '%s'"), argv[0]);
 767
 768                if (filter.kind != FILTER_REFS_BRANCHES)
 769                        die(_("-a and -r options to 'git branch' do not make sense with a branch name"));
 770
 771                if (track == BRANCH_TRACK_OVERRIDE)
 772                        fprintf(stderr, _("The --set-upstream flag is deprecated and will be removed. Consider using --track or --set-upstream-to\n"));
 773
 774                strbuf_addf(&buf, "refs/remotes/%s", branch->name);
 775                remote_tracking = ref_exists(buf.buf);
 776                strbuf_release(&buf);
 777
 778                branch_existed = ref_exists(branch->refname);
 779                create_branch(argv[0], (argc == 2) ? argv[1] : head,
 780                              force, reflog, 0, quiet, track);
 781
 782                /*
 783                 * We only show the instructions if the user gave us
 784                 * one branch which doesn't exist locally, but is the
 785                 * name of a remote-tracking branch.
 786                 */
 787                if (argc == 1 && track == BRANCH_TRACK_OVERRIDE &&
 788                    !branch_existed && remote_tracking) {
 789                        fprintf(stderr, _("\nIf you wanted to make '%s' track '%s', do this:\n\n"), head, branch->name);
 790                        fprintf(stderr, "    git branch -d %s\n", branch->name);
 791                        fprintf(stderr, "    git branch --set-upstream-to %s\n", branch->name);
 792                }
 793
 794        } else
 795                usage_with_options(builtin_branch_usage, options);
 796
 797        return 0;
 798}