builtin / branch.con commit for-each-ref: add '--points-at' option (d325406)
   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 "color.h"
  10#include "refs.h"
  11#include "commit.h"
  12#include "builtin.h"
  13#include "remote.h"
  14#include "parse-options.h"
  15#include "branch.h"
  16#include "diff.h"
  17#include "revision.h"
  18#include "string-list.h"
  19#include "column.h"
  20#include "utf8.h"
  21#include "wt-status.h"
  22
  23static const char * const builtin_branch_usage[] = {
  24        N_("git branch [<options>] [-r | -a] [--merged | --no-merged]"),
  25        N_("git branch [<options>] [-l] [-f] <branch-name> [<start-point>]"),
  26        N_("git branch [<options>] [-r] (-d | -D) <branch-name>..."),
  27        N_("git branch [<options>] (-m | -M) [<old-branch>] <new-branch>"),
  28        NULL
  29};
  30
  31#define REF_LOCAL_BRANCH    0x01
  32#define REF_REMOTE_BRANCH   0x02
  33
  34static const char *head;
  35static unsigned char head_sha1[20];
  36
  37static int branch_use_color = -1;
  38static char branch_colors[][COLOR_MAXLEN] = {
  39        GIT_COLOR_RESET,
  40        GIT_COLOR_NORMAL,       /* PLAIN */
  41        GIT_COLOR_RED,          /* REMOTE */
  42        GIT_COLOR_NORMAL,       /* LOCAL */
  43        GIT_COLOR_GREEN,        /* CURRENT */
  44        GIT_COLOR_BLUE,         /* UPSTREAM */
  45};
  46enum color_branch {
  47        BRANCH_COLOR_RESET = 0,
  48        BRANCH_COLOR_PLAIN = 1,
  49        BRANCH_COLOR_REMOTE = 2,
  50        BRANCH_COLOR_LOCAL = 3,
  51        BRANCH_COLOR_CURRENT = 4,
  52        BRANCH_COLOR_UPSTREAM = 5
  53};
  54
  55static enum merge_filter {
  56        NO_FILTER = 0,
  57        SHOW_NOT_MERGED,
  58        SHOW_MERGED
  59} merge_filter;
  60static unsigned char merge_filter_ref[20];
  61
  62static struct string_list output = STRING_LIST_INIT_DUP;
  63static unsigned int colopts;
  64
  65static int parse_branch_color_slot(const char *slot)
  66{
  67        if (!strcasecmp(slot, "plain"))
  68                return BRANCH_COLOR_PLAIN;
  69        if (!strcasecmp(slot, "reset"))
  70                return BRANCH_COLOR_RESET;
  71        if (!strcasecmp(slot, "remote"))
  72                return BRANCH_COLOR_REMOTE;
  73        if (!strcasecmp(slot, "local"))
  74                return BRANCH_COLOR_LOCAL;
  75        if (!strcasecmp(slot, "current"))
  76                return BRANCH_COLOR_CURRENT;
  77        if (!strcasecmp(slot, "upstream"))
  78                return BRANCH_COLOR_UPSTREAM;
  79        return -1;
  80}
  81
  82static int git_branch_config(const char *var, const char *value, void *cb)
  83{
  84        const char *slot_name;
  85
  86        if (starts_with(var, "column."))
  87                return git_column_config(var, value, "branch", &colopts);
  88        if (!strcmp(var, "color.branch")) {
  89                branch_use_color = git_config_colorbool(var, value);
  90                return 0;
  91        }
  92        if (skip_prefix(var, "color.branch.", &slot_name)) {
  93                int slot = parse_branch_color_slot(slot_name);
  94                if (slot < 0)
  95                        return 0;
  96                if (!value)
  97                        return config_error_nonbool(var);
  98                return color_parse(value, branch_colors[slot]);
  99        }
 100        return git_color_default_config(var, value, cb);
 101}
 102
 103static const char *branch_get_color(enum color_branch ix)
 104{
 105        if (want_color(branch_use_color))
 106                return branch_colors[ix];
 107        return "";
 108}
 109
 110static int branch_merged(int kind, const char *name,
 111                         struct commit *rev, struct commit *head_rev)
 112{
 113        /*
 114         * This checks whether the merge bases of branch and HEAD (or
 115         * the other branch this branch builds upon) contains the
 116         * branch, which means that the branch has already been merged
 117         * safely to HEAD (or the other branch).
 118         */
 119        struct commit *reference_rev = NULL;
 120        const char *reference_name = NULL;
 121        void *reference_name_to_free = NULL;
 122        int merged;
 123
 124        if (kind == REF_LOCAL_BRANCH) {
 125                struct branch *branch = branch_get(name);
 126                const char *upstream = branch_get_upstream(branch, NULL);
 127                unsigned char sha1[20];
 128
 129                if (upstream &&
 130                    (reference_name = reference_name_to_free =
 131                     resolve_refdup(upstream, RESOLVE_REF_READING,
 132                                    sha1, NULL)) != NULL)
 133                        reference_rev = lookup_commit_reference(sha1);
 134        }
 135        if (!reference_rev)
 136                reference_rev = head_rev;
 137
 138        merged = in_merge_bases(rev, reference_rev);
 139
 140        /*
 141         * After the safety valve is fully redefined to "check with
 142         * upstream, if any, otherwise with HEAD", we should just
 143         * return the result of the in_merge_bases() above without
 144         * any of the following code, but during the transition period,
 145         * a gentle reminder is in order.
 146         */
 147        if ((head_rev != reference_rev) &&
 148            in_merge_bases(rev, head_rev) != merged) {
 149                if (merged)
 150                        warning(_("deleting branch '%s' that has been merged to\n"
 151                                "         '%s', but not yet merged to HEAD."),
 152                                name, reference_name);
 153                else
 154                        warning(_("not deleting branch '%s' that is not yet merged to\n"
 155                                "         '%s', even though it is merged to HEAD."),
 156                                name, reference_name);
 157        }
 158        free(reference_name_to_free);
 159        return merged;
 160}
 161
 162static int check_branch_commit(const char *branchname, const char *refname,
 163                               unsigned char *sha1, struct commit *head_rev,
 164                               int kinds, int force)
 165{
 166        struct commit *rev = lookup_commit_reference(sha1);
 167        if (!rev) {
 168                error(_("Couldn't look up commit object for '%s'"), refname);
 169                return -1;
 170        }
 171        if (!force && !branch_merged(kinds, branchname, rev, head_rev)) {
 172                error(_("The branch '%s' is not fully merged.\n"
 173                      "If you are sure you want to delete it, "
 174                      "run 'git branch -D %s'."), branchname, branchname);
 175                return -1;
 176        }
 177        return 0;
 178}
 179
 180static void delete_branch_config(const char *branchname)
 181{
 182        struct strbuf buf = STRBUF_INIT;
 183        strbuf_addf(&buf, "branch.%s", branchname);
 184        if (git_config_rename_section(buf.buf, NULL) < 0)
 185                warning(_("Update of config-file failed"));
 186        strbuf_release(&buf);
 187}
 188
 189static int delete_branches(int argc, const char **argv, int force, int kinds,
 190                           int quiet)
 191{
 192        struct commit *head_rev = NULL;
 193        unsigned char sha1[20];
 194        char *name = NULL;
 195        const char *fmt;
 196        int i;
 197        int ret = 0;
 198        int remote_branch = 0;
 199        struct strbuf bname = STRBUF_INIT;
 200
 201        switch (kinds) {
 202        case REF_REMOTE_BRANCH:
 203                fmt = "refs/remotes/%s";
 204                /* For subsequent UI messages */
 205                remote_branch = 1;
 206
 207                force = 1;
 208                break;
 209        case REF_LOCAL_BRANCH:
 210                fmt = "refs/heads/%s";
 211                break;
 212        default:
 213                die(_("cannot use -a with -d"));
 214        }
 215
 216        if (!force) {
 217                head_rev = lookup_commit_reference(head_sha1);
 218                if (!head_rev)
 219                        die(_("Couldn't look up commit object for HEAD"));
 220        }
 221        for (i = 0; i < argc; i++, strbuf_release(&bname)) {
 222                const char *target;
 223                int flags = 0;
 224
 225                strbuf_branchname(&bname, argv[i]);
 226                if (kinds == REF_LOCAL_BRANCH && !strcmp(head, bname.buf)) {
 227                        error(_("Cannot delete the branch '%s' "
 228                              "which you are currently on."), bname.buf);
 229                        ret = 1;
 230                        continue;
 231                }
 232
 233                free(name);
 234
 235                name = mkpathdup(fmt, bname.buf);
 236                target = resolve_ref_unsafe(name,
 237                                            RESOLVE_REF_READING
 238                                            | RESOLVE_REF_NO_RECURSE
 239                                            | RESOLVE_REF_ALLOW_BAD_NAME,
 240                                            sha1, &flags);
 241                if (!target) {
 242                        error(remote_branch
 243                              ? _("remote-tracking branch '%s' not found.")
 244                              : _("branch '%s' not found."), bname.buf);
 245                        ret = 1;
 246                        continue;
 247                }
 248
 249                if (!(flags & (REF_ISSYMREF|REF_ISBROKEN)) &&
 250                    check_branch_commit(bname.buf, name, sha1, head_rev, kinds,
 251                                        force)) {
 252                        ret = 1;
 253                        continue;
 254                }
 255
 256                if (delete_ref(name, sha1, REF_NODEREF)) {
 257                        error(remote_branch
 258                              ? _("Error deleting remote-tracking branch '%s'")
 259                              : _("Error deleting branch '%s'"),
 260                              bname.buf);
 261                        ret = 1;
 262                        continue;
 263                }
 264                if (!quiet) {
 265                        printf(remote_branch
 266                               ? _("Deleted remote-tracking branch %s (was %s).\n")
 267                               : _("Deleted branch %s (was %s).\n"),
 268                               bname.buf,
 269                               (flags & REF_ISBROKEN) ? "broken"
 270                               : (flags & REF_ISSYMREF) ? target
 271                               : find_unique_abbrev(sha1, DEFAULT_ABBREV));
 272                }
 273                delete_branch_config(bname.buf);
 274        }
 275
 276        free(name);
 277
 278        return(ret);
 279}
 280
 281struct ref_item {
 282        char *name;
 283        char *dest;
 284        unsigned int kind, width;
 285        struct commit *commit;
 286        int ignore;
 287};
 288
 289struct ref_list {
 290        struct rev_info revs;
 291        int index, alloc, maxwidth, verbose, abbrev;
 292        struct ref_item *list;
 293        struct commit_list *with_commit;
 294        int kinds;
 295};
 296
 297static char *resolve_symref(const char *src, const char *prefix)
 298{
 299        unsigned char sha1[20];
 300        int flag;
 301        const char *dst;
 302
 303        dst = resolve_ref_unsafe(src, 0, sha1, &flag);
 304        if (!(dst && (flag & REF_ISSYMREF)))
 305                return NULL;
 306        if (prefix)
 307                skip_prefix(dst, prefix, &dst);
 308        return xstrdup(dst);
 309}
 310
 311struct append_ref_cb {
 312        struct ref_list *ref_list;
 313        const char **pattern;
 314        int ret;
 315};
 316
 317static int match_patterns(const char **pattern, const char *refname)
 318{
 319        if (!*pattern)
 320                return 1; /* no pattern always matches */
 321        while (*pattern) {
 322                if (!wildmatch(*pattern, refname, 0, NULL))
 323                        return 1;
 324                pattern++;
 325        }
 326        return 0;
 327}
 328
 329static int append_ref(const char *refname, const struct object_id *oid, int flags, void *cb_data)
 330{
 331        struct append_ref_cb *cb = (struct append_ref_cb *)(cb_data);
 332        struct ref_list *ref_list = cb->ref_list;
 333        struct ref_item *newitem;
 334        struct commit *commit;
 335        int kind, i;
 336        const char *prefix, *orig_refname = refname;
 337
 338        static struct {
 339                int kind;
 340                const char *prefix;
 341        } ref_kind[] = {
 342                { REF_LOCAL_BRANCH, "refs/heads/" },
 343                { REF_REMOTE_BRANCH, "refs/remotes/" },
 344        };
 345
 346        /* Detect kind */
 347        for (i = 0; i < ARRAY_SIZE(ref_kind); i++) {
 348                prefix = ref_kind[i].prefix;
 349                if (skip_prefix(refname, prefix, &refname)) {
 350                        kind = ref_kind[i].kind;
 351                        break;
 352                }
 353        }
 354        if (ARRAY_SIZE(ref_kind) <= i)
 355                return 0;
 356
 357        /* Don't add types the caller doesn't want */
 358        if ((kind & ref_list->kinds) == 0)
 359                return 0;
 360
 361        if (!match_patterns(cb->pattern, refname))
 362                return 0;
 363
 364        commit = NULL;
 365        if (ref_list->verbose || ref_list->with_commit || merge_filter != NO_FILTER) {
 366                commit = lookup_commit_reference_gently(oid->hash, 1);
 367                if (!commit) {
 368                        cb->ret = error(_("branch '%s' does not point at a commit"), refname);
 369                        return 0;
 370                }
 371
 372                /* Filter with with_commit if specified */
 373                if (!is_descendant_of(commit, ref_list->with_commit))
 374                        return 0;
 375
 376                if (merge_filter != NO_FILTER)
 377                        add_pending_object(&ref_list->revs,
 378                                           (struct object *)commit, refname);
 379        }
 380
 381        ALLOC_GROW(ref_list->list, ref_list->index + 1, ref_list->alloc);
 382
 383        /* Record the new item */
 384        newitem = &(ref_list->list[ref_list->index++]);
 385        newitem->name = xstrdup(refname);
 386        newitem->kind = kind;
 387        newitem->commit = commit;
 388        newitem->width = utf8_strwidth(refname);
 389        newitem->dest = resolve_symref(orig_refname, prefix);
 390        newitem->ignore = 0;
 391        /* adjust for "remotes/" */
 392        if (newitem->kind == REF_REMOTE_BRANCH &&
 393            ref_list->kinds != REF_REMOTE_BRANCH)
 394                newitem->width += 8;
 395        if (newitem->width > ref_list->maxwidth)
 396                ref_list->maxwidth = newitem->width;
 397
 398        return 0;
 399}
 400
 401static void free_ref_list(struct ref_list *ref_list)
 402{
 403        int i;
 404
 405        for (i = 0; i < ref_list->index; i++) {
 406                free(ref_list->list[i].name);
 407                free(ref_list->list[i].dest);
 408        }
 409        free(ref_list->list);
 410}
 411
 412static int ref_cmp(const void *r1, const void *r2)
 413{
 414        struct ref_item *c1 = (struct ref_item *)(r1);
 415        struct ref_item *c2 = (struct ref_item *)(r2);
 416
 417        if (c1->kind != c2->kind)
 418                return c1->kind - c2->kind;
 419        return strcmp(c1->name, c2->name);
 420}
 421
 422static void fill_tracking_info(struct strbuf *stat, const char *branch_name,
 423                int show_upstream_ref)
 424{
 425        int ours, theirs;
 426        char *ref = NULL;
 427        struct branch *branch = branch_get(branch_name);
 428        const char *upstream;
 429        struct strbuf fancy = STRBUF_INIT;
 430        int upstream_is_gone = 0;
 431        int added_decoration = 1;
 432
 433        if (stat_tracking_info(branch, &ours, &theirs, &upstream) < 0) {
 434                if (!upstream)
 435                        return;
 436                upstream_is_gone = 1;
 437        }
 438
 439        if (show_upstream_ref) {
 440                ref = shorten_unambiguous_ref(upstream, 0);
 441                if (want_color(branch_use_color))
 442                        strbuf_addf(&fancy, "%s%s%s",
 443                                        branch_get_color(BRANCH_COLOR_UPSTREAM),
 444                                        ref, branch_get_color(BRANCH_COLOR_RESET));
 445                else
 446                        strbuf_addstr(&fancy, ref);
 447        }
 448
 449        if (upstream_is_gone) {
 450                if (show_upstream_ref)
 451                        strbuf_addf(stat, _("[%s: gone]"), fancy.buf);
 452                else
 453                        added_decoration = 0;
 454        } else if (!ours && !theirs) {
 455                if (show_upstream_ref)
 456                        strbuf_addf(stat, _("[%s]"), fancy.buf);
 457                else
 458                        added_decoration = 0;
 459        } else if (!ours) {
 460                if (show_upstream_ref)
 461                        strbuf_addf(stat, _("[%s: behind %d]"), fancy.buf, theirs);
 462                else
 463                        strbuf_addf(stat, _("[behind %d]"), theirs);
 464
 465        } else if (!theirs) {
 466                if (show_upstream_ref)
 467                        strbuf_addf(stat, _("[%s: ahead %d]"), fancy.buf, ours);
 468                else
 469                        strbuf_addf(stat, _("[ahead %d]"), ours);
 470        } else {
 471                if (show_upstream_ref)
 472                        strbuf_addf(stat, _("[%s: ahead %d, behind %d]"),
 473                                    fancy.buf, ours, theirs);
 474                else
 475                        strbuf_addf(stat, _("[ahead %d, behind %d]"),
 476                                    ours, theirs);
 477        }
 478        strbuf_release(&fancy);
 479        if (added_decoration)
 480                strbuf_addch(stat, ' ');
 481        free(ref);
 482}
 483
 484static void add_verbose_info(struct strbuf *out, struct ref_item *item,
 485                             int verbose, int abbrev)
 486{
 487        struct strbuf subject = STRBUF_INIT, stat = STRBUF_INIT;
 488        const char *sub = _(" **** invalid ref ****");
 489        struct commit *commit = item->commit;
 490
 491        if (!parse_commit(commit)) {
 492                pp_commit_easy(CMIT_FMT_ONELINE, commit, &subject);
 493                sub = subject.buf;
 494        }
 495
 496        if (item->kind == REF_LOCAL_BRANCH)
 497                fill_tracking_info(&stat, item->name, verbose > 1);
 498
 499        strbuf_addf(out, " %s %s%s",
 500                find_unique_abbrev(item->commit->object.sha1, abbrev),
 501                stat.buf, sub);
 502        strbuf_release(&stat);
 503        strbuf_release(&subject);
 504}
 505
 506static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
 507                           int abbrev, int current, char *prefix)
 508{
 509        char c;
 510        int color;
 511        struct strbuf out = STRBUF_INIT, name = STRBUF_INIT;
 512
 513        if (item->ignore)
 514                return;
 515
 516        switch (item->kind) {
 517        case REF_LOCAL_BRANCH:
 518                color = BRANCH_COLOR_LOCAL;
 519                break;
 520        case REF_REMOTE_BRANCH:
 521                color = BRANCH_COLOR_REMOTE;
 522                break;
 523        default:
 524                color = BRANCH_COLOR_PLAIN;
 525                break;
 526        }
 527
 528        c = ' ';
 529        if (current) {
 530                c = '*';
 531                color = BRANCH_COLOR_CURRENT;
 532        }
 533
 534        strbuf_addf(&name, "%s%s", prefix, item->name);
 535        if (verbose) {
 536                int utf8_compensation = strlen(name.buf) - utf8_strwidth(name.buf);
 537                strbuf_addf(&out, "%c %s%-*s%s", c, branch_get_color(color),
 538                            maxwidth + utf8_compensation, name.buf,
 539                            branch_get_color(BRANCH_COLOR_RESET));
 540        } else
 541                strbuf_addf(&out, "%c %s%s%s", c, branch_get_color(color),
 542                            name.buf, branch_get_color(BRANCH_COLOR_RESET));
 543
 544        if (item->dest)
 545                strbuf_addf(&out, " -> %s", item->dest);
 546        else if (verbose)
 547                /* " f7c0c00 [ahead 58, behind 197] vcs-svn: drop obj_pool.h" */
 548                add_verbose_info(&out, item, verbose, abbrev);
 549        if (column_active(colopts)) {
 550                assert(!verbose && "--column and --verbose are incompatible");
 551                string_list_append(&output, out.buf);
 552        } else {
 553                printf("%s\n", out.buf);
 554        }
 555        strbuf_release(&name);
 556        strbuf_release(&out);
 557}
 558
 559static int calc_maxwidth(struct ref_list *refs)
 560{
 561        int i, w = 0;
 562        for (i = 0; i < refs->index; i++) {
 563                if (refs->list[i].ignore)
 564                        continue;
 565                if (refs->list[i].width > w)
 566                        w = refs->list[i].width;
 567        }
 568        return w;
 569}
 570
 571static char *get_head_description(void)
 572{
 573        struct strbuf desc = STRBUF_INIT;
 574        struct wt_status_state state;
 575        memset(&state, 0, sizeof(state));
 576        wt_status_get_state(&state, 1);
 577        if (state.rebase_in_progress ||
 578            state.rebase_interactive_in_progress)
 579                strbuf_addf(&desc, _("(no branch, rebasing %s)"),
 580                            state.branch);
 581        else if (state.bisect_in_progress)
 582                strbuf_addf(&desc, _("(no branch, bisect started on %s)"),
 583                            state.branch);
 584        else if (state.detached_from) {
 585                /* TRANSLATORS: make sure these match _("HEAD detached at ")
 586                   and _("HEAD detached from ") in wt-status.c */
 587                if (state.detached_at)
 588                        strbuf_addf(&desc, _("(HEAD detached at %s)"),
 589                                state.detached_from);
 590                else
 591                        strbuf_addf(&desc, _("(HEAD detached from %s)"),
 592                                state.detached_from);
 593        }
 594        else
 595                strbuf_addstr(&desc, _("(no branch)"));
 596        free(state.branch);
 597        free(state.onto);
 598        free(state.detached_from);
 599        return strbuf_detach(&desc, NULL);
 600}
 601
 602static void show_detached(struct ref_list *ref_list)
 603{
 604        struct commit *head_commit = lookup_commit_reference_gently(head_sha1, 1);
 605
 606        if (head_commit && is_descendant_of(head_commit, ref_list->with_commit)) {
 607                struct ref_item item;
 608                item.name = get_head_description();
 609                item.width = utf8_strwidth(item.name);
 610                item.kind = REF_LOCAL_BRANCH;
 611                item.dest = NULL;
 612                item.commit = head_commit;
 613                item.ignore = 0;
 614                if (item.width > ref_list->maxwidth)
 615                        ref_list->maxwidth = item.width;
 616                print_ref_item(&item, ref_list->maxwidth, ref_list->verbose, ref_list->abbrev, 1, "");
 617                free(item.name);
 618        }
 619}
 620
 621static int print_ref_list(int kinds, int detached, int verbose, int abbrev, struct commit_list *with_commit, const char **pattern)
 622{
 623        int i;
 624        struct append_ref_cb cb;
 625        struct ref_list ref_list;
 626
 627        memset(&ref_list, 0, sizeof(ref_list));
 628        ref_list.kinds = kinds;
 629        ref_list.verbose = verbose;
 630        ref_list.abbrev = abbrev;
 631        ref_list.with_commit = with_commit;
 632        if (merge_filter != NO_FILTER)
 633                init_revisions(&ref_list.revs, NULL);
 634        cb.ref_list = &ref_list;
 635        cb.pattern = pattern;
 636        cb.ret = 0;
 637        for_each_rawref(append_ref, &cb);
 638        if (merge_filter != NO_FILTER) {
 639                struct commit *filter;
 640                filter = lookup_commit_reference_gently(merge_filter_ref, 0);
 641                if (!filter)
 642                        die(_("object '%s' does not point to a commit"),
 643                            sha1_to_hex(merge_filter_ref));
 644
 645                filter->object.flags |= UNINTERESTING;
 646                add_pending_object(&ref_list.revs,
 647                                   (struct object *) filter, "");
 648                ref_list.revs.limited = 1;
 649
 650                if (prepare_revision_walk(&ref_list.revs))
 651                        die(_("revision walk setup failed"));
 652
 653                for (i = 0; i < ref_list.index; i++) {
 654                        struct ref_item *item = &ref_list.list[i];
 655                        struct commit *commit = item->commit;
 656                        int is_merged = !!(commit->object.flags & UNINTERESTING);
 657                        item->ignore = is_merged != (merge_filter == SHOW_MERGED);
 658                }
 659
 660                for (i = 0; i < ref_list.index; i++) {
 661                        struct ref_item *item = &ref_list.list[i];
 662                        clear_commit_marks(item->commit, ALL_REV_FLAGS);
 663                }
 664                clear_commit_marks(filter, ALL_REV_FLAGS);
 665
 666                if (verbose)
 667                        ref_list.maxwidth = calc_maxwidth(&ref_list);
 668        }
 669
 670        qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp);
 671
 672        detached = (detached && (kinds & REF_LOCAL_BRANCH));
 673        if (detached && match_patterns(pattern, "HEAD"))
 674                show_detached(&ref_list);
 675
 676        for (i = 0; i < ref_list.index; i++) {
 677                int current = !detached &&
 678                        (ref_list.list[i].kind == REF_LOCAL_BRANCH) &&
 679                        !strcmp(ref_list.list[i].name, head);
 680                char *prefix = (kinds != REF_REMOTE_BRANCH &&
 681                                ref_list.list[i].kind == REF_REMOTE_BRANCH)
 682                                ? "remotes/" : "";
 683                print_ref_item(&ref_list.list[i], ref_list.maxwidth, verbose,
 684                               abbrev, current, prefix);
 685        }
 686
 687        free_ref_list(&ref_list);
 688
 689        if (cb.ret)
 690                error(_("some refs could not be read"));
 691
 692        return cb.ret;
 693}
 694
 695static void rename_branch(const char *oldname, const char *newname, int force)
 696{
 697        struct strbuf oldref = STRBUF_INIT, newref = STRBUF_INIT, logmsg = STRBUF_INIT;
 698        struct strbuf oldsection = STRBUF_INIT, newsection = STRBUF_INIT;
 699        int recovery = 0;
 700        int clobber_head_ok;
 701
 702        if (!oldname)
 703                die(_("cannot rename the current branch while not on any."));
 704
 705        if (strbuf_check_branch_ref(&oldref, oldname)) {
 706                /*
 707                 * Bad name --- this could be an attempt to rename a
 708                 * ref that we used to allow to be created by accident.
 709                 */
 710                if (ref_exists(oldref.buf))
 711                        recovery = 1;
 712                else
 713                        die(_("Invalid branch name: '%s'"), oldname);
 714        }
 715
 716        /*
 717         * A command like "git branch -M currentbranch currentbranch" cannot
 718         * cause the worktree to become inconsistent with HEAD, so allow it.
 719         */
 720        clobber_head_ok = !strcmp(oldname, newname);
 721
 722        validate_new_branchname(newname, &newref, force, clobber_head_ok);
 723
 724        strbuf_addf(&logmsg, "Branch: renamed %s to %s",
 725                 oldref.buf, newref.buf);
 726
 727        if (rename_ref(oldref.buf, newref.buf, logmsg.buf))
 728                die(_("Branch rename failed"));
 729        strbuf_release(&logmsg);
 730
 731        if (recovery)
 732                warning(_("Renamed a misnamed branch '%s' away"), oldref.buf + 11);
 733
 734        /* no need to pass logmsg here as HEAD didn't really move */
 735        if (!strcmp(oldname, head) && create_symref("HEAD", newref.buf, NULL))
 736                die(_("Branch renamed to %s, but HEAD is not updated!"), newname);
 737
 738        strbuf_addf(&oldsection, "branch.%s", oldref.buf + 11);
 739        strbuf_release(&oldref);
 740        strbuf_addf(&newsection, "branch.%s", newref.buf + 11);
 741        strbuf_release(&newref);
 742        if (git_config_rename_section(oldsection.buf, newsection.buf) < 0)
 743                die(_("Branch is renamed, but update of config-file failed"));
 744        strbuf_release(&oldsection);
 745        strbuf_release(&newsection);
 746}
 747
 748static int opt_parse_merge_filter(const struct option *opt, const char *arg, int unset)
 749{
 750        merge_filter = ((opt->long_name[0] == 'n')
 751                        ? SHOW_NOT_MERGED
 752                        : SHOW_MERGED);
 753        if (unset)
 754                merge_filter = SHOW_NOT_MERGED; /* b/c for --no-merged */
 755        if (!arg)
 756                arg = "HEAD";
 757        if (get_sha1(arg, merge_filter_ref))
 758                die(_("malformed object name %s"), arg);
 759        return 0;
 760}
 761
 762static const char edit_description[] = "BRANCH_DESCRIPTION";
 763
 764static int edit_branch_description(const char *branch_name)
 765{
 766        int status;
 767        struct strbuf buf = STRBUF_INIT;
 768        struct strbuf name = STRBUF_INIT;
 769
 770        read_branch_desc(&buf, branch_name);
 771        if (!buf.len || buf.buf[buf.len-1] != '\n')
 772                strbuf_addch(&buf, '\n');
 773        strbuf_commented_addf(&buf,
 774                    "Please edit the description for the branch\n"
 775                    "  %s\n"
 776                    "Lines starting with '%c' will be stripped.\n",
 777                    branch_name, comment_line_char);
 778        if (write_file(git_path(edit_description), 0, "%s", buf.buf)) {
 779                strbuf_release(&buf);
 780                return error(_("could not write branch description template: %s"),
 781                             strerror(errno));
 782        }
 783        strbuf_reset(&buf);
 784        if (launch_editor(git_path(edit_description), &buf, NULL)) {
 785                strbuf_release(&buf);
 786                return -1;
 787        }
 788        stripspace(&buf, 1);
 789
 790        strbuf_addf(&name, "branch.%s.description", branch_name);
 791        status = git_config_set(name.buf, buf.len ? buf.buf : NULL);
 792        strbuf_release(&name);
 793        strbuf_release(&buf);
 794
 795        return status;
 796}
 797
 798int cmd_branch(int argc, const char **argv, const char *prefix)
 799{
 800        int delete = 0, rename = 0, force = 0, list = 0;
 801        int verbose = 0, abbrev = -1, detached = 0;
 802        int reflog = 0, edit_description = 0;
 803        int quiet = 0, unset_upstream = 0;
 804        const char *new_upstream = NULL;
 805        enum branch_track track;
 806        int kinds = REF_LOCAL_BRANCH;
 807        struct commit_list *with_commit = NULL;
 808
 809        struct option options[] = {
 810                OPT_GROUP(N_("Generic options")),
 811                OPT__VERBOSE(&verbose,
 812                        N_("show hash and subject, give twice for upstream branch")),
 813                OPT__QUIET(&quiet, N_("suppress informational messages")),
 814                OPT_SET_INT('t', "track",  &track, N_("set up tracking mode (see git-pull(1))"),
 815                        BRANCH_TRACK_EXPLICIT),
 816                OPT_SET_INT( 0, "set-upstream",  &track, N_("change upstream info"),
 817                        BRANCH_TRACK_OVERRIDE),
 818                OPT_STRING('u', "set-upstream-to", &new_upstream, "upstream", "change the upstream info"),
 819                OPT_BOOL(0, "unset-upstream", &unset_upstream, "Unset the upstream info"),
 820                OPT__COLOR(&branch_use_color, N_("use colored output")),
 821                OPT_SET_INT('r', "remotes",     &kinds, N_("act on remote-tracking branches"),
 822                        REF_REMOTE_BRANCH),
 823                {
 824                        OPTION_CALLBACK, 0, "contains", &with_commit, N_("commit"),
 825                        N_("print only branches that contain the commit"),
 826                        PARSE_OPT_LASTARG_DEFAULT,
 827                        parse_opt_with_commit, (intptr_t)"HEAD",
 828                },
 829                {
 830                        OPTION_CALLBACK, 0, "with", &with_commit, N_("commit"),
 831                        N_("print only branches that contain the commit"),
 832                        PARSE_OPT_HIDDEN | PARSE_OPT_LASTARG_DEFAULT,
 833                        parse_opt_with_commit, (intptr_t) "HEAD",
 834                },
 835                OPT__ABBREV(&abbrev),
 836
 837                OPT_GROUP(N_("Specific git-branch actions:")),
 838                OPT_SET_INT('a', "all", &kinds, N_("list both remote-tracking and local branches"),
 839                        REF_REMOTE_BRANCH | REF_LOCAL_BRANCH),
 840                OPT_BIT('d', "delete", &delete, N_("delete fully merged branch"), 1),
 841                OPT_BIT('D', NULL, &delete, N_("delete branch (even if not merged)"), 2),
 842                OPT_BIT('m', "move", &rename, N_("move/rename a branch and its reflog"), 1),
 843                OPT_BIT('M', NULL, &rename, N_("move/rename a branch, even if target exists"), 2),
 844                OPT_BOOL(0, "list", &list, N_("list branch names")),
 845                OPT_BOOL('l', "create-reflog", &reflog, N_("create the branch's reflog")),
 846                OPT_BOOL(0, "edit-description", &edit_description,
 847                         N_("edit the description for the branch")),
 848                OPT__FORCE(&force, N_("force creation, move/rename, deletion")),
 849                {
 850                        OPTION_CALLBACK, 0, "no-merged", &merge_filter_ref,
 851                        N_("commit"), N_("print only not merged branches"),
 852                        PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
 853                        opt_parse_merge_filter, (intptr_t) "HEAD",
 854                },
 855                {
 856                        OPTION_CALLBACK, 0, "merged", &merge_filter_ref,
 857                        N_("commit"), N_("print only merged branches"),
 858                        PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
 859                        opt_parse_merge_filter, (intptr_t) "HEAD",
 860                },
 861                OPT_COLUMN(0, "column", &colopts, N_("list branches in columns")),
 862                OPT_END(),
 863        };
 864
 865        if (argc == 2 && !strcmp(argv[1], "-h"))
 866                usage_with_options(builtin_branch_usage, options);
 867
 868        git_config(git_branch_config, NULL);
 869
 870        track = git_branch_track;
 871
 872        head = resolve_refdup("HEAD", 0, head_sha1, NULL);
 873        if (!head)
 874                die(_("Failed to resolve HEAD as a valid ref."));
 875        if (!strcmp(head, "HEAD"))
 876                detached = 1;
 877        else if (!skip_prefix(head, "refs/heads/", &head))
 878                die(_("HEAD not found below refs/heads!"));
 879        hashcpy(merge_filter_ref, head_sha1);
 880
 881
 882        argc = parse_options(argc, argv, prefix, options, builtin_branch_usage,
 883                             0);
 884
 885        if (!delete && !rename && !edit_description && !new_upstream && !unset_upstream && argc == 0)
 886                list = 1;
 887
 888        if (with_commit || merge_filter != NO_FILTER)
 889                list = 1;
 890
 891        if (!!delete + !!rename + !!new_upstream +
 892            list + unset_upstream > 1)
 893                usage_with_options(builtin_branch_usage, options);
 894
 895        if (abbrev == -1)
 896                abbrev = DEFAULT_ABBREV;
 897        finalize_colopts(&colopts, -1);
 898        if (verbose) {
 899                if (explicitly_enable_column(colopts))
 900                        die(_("--column and --verbose are incompatible"));
 901                colopts = 0;
 902        }
 903
 904        if (force) {
 905                delete *= 2;
 906                rename *= 2;
 907        }
 908
 909        if (delete) {
 910                if (!argc)
 911                        die(_("branch name required"));
 912                return delete_branches(argc, argv, delete > 1, kinds, quiet);
 913        } else if (list) {
 914                int ret = print_ref_list(kinds, detached, verbose, abbrev,
 915                                         with_commit, argv);
 916                print_columns(&output, colopts, NULL);
 917                string_list_clear(&output, 0);
 918                return ret;
 919        }
 920        else if (edit_description) {
 921                const char *branch_name;
 922                struct strbuf branch_ref = STRBUF_INIT;
 923
 924                if (!argc) {
 925                        if (detached)
 926                                die(_("Cannot give description to detached HEAD"));
 927                        branch_name = head;
 928                } else if (argc == 1)
 929                        branch_name = argv[0];
 930                else
 931                        die(_("cannot edit description of more than one branch"));
 932
 933                strbuf_addf(&branch_ref, "refs/heads/%s", branch_name);
 934                if (!ref_exists(branch_ref.buf)) {
 935                        strbuf_release(&branch_ref);
 936
 937                        if (!argc)
 938                                return error(_("No commit on branch '%s' yet."),
 939                                             branch_name);
 940                        else
 941                                return error(_("No branch named '%s'."),
 942                                             branch_name);
 943                }
 944                strbuf_release(&branch_ref);
 945
 946                if (edit_branch_description(branch_name))
 947                        return 1;
 948        } else if (rename) {
 949                if (!argc)
 950                        die(_("branch name required"));
 951                else if (argc == 1)
 952                        rename_branch(head, argv[0], rename > 1);
 953                else if (argc == 2)
 954                        rename_branch(argv[0], argv[1], rename > 1);
 955                else
 956                        die(_("too many branches for a rename operation"));
 957        } else if (new_upstream) {
 958                struct branch *branch = branch_get(argv[0]);
 959
 960                if (argc > 1)
 961                        die(_("too many branches to set new upstream"));
 962
 963                if (!branch) {
 964                        if (!argc || !strcmp(argv[0], "HEAD"))
 965                                die(_("could not set upstream of HEAD to %s when "
 966                                      "it does not point to any branch."),
 967                                    new_upstream);
 968                        die(_("no such branch '%s'"), argv[0]);
 969                }
 970
 971                if (!ref_exists(branch->refname))
 972                        die(_("branch '%s' does not exist"), branch->name);
 973
 974                /*
 975                 * create_branch takes care of setting up the tracking
 976                 * info and making sure new_upstream is correct
 977                 */
 978                create_branch(head, branch->name, new_upstream, 0, 0, 0, quiet, BRANCH_TRACK_OVERRIDE);
 979        } else if (unset_upstream) {
 980                struct branch *branch = branch_get(argv[0]);
 981                struct strbuf buf = STRBUF_INIT;
 982
 983                if (argc > 1)
 984                        die(_("too many branches to unset upstream"));
 985
 986                if (!branch) {
 987                        if (!argc || !strcmp(argv[0], "HEAD"))
 988                                die(_("could not unset upstream of HEAD when "
 989                                      "it does not point to any branch."));
 990                        die(_("no such branch '%s'"), argv[0]);
 991                }
 992
 993                if (!branch_has_merge_config(branch))
 994                        die(_("Branch '%s' has no upstream information"), branch->name);
 995
 996                strbuf_addf(&buf, "branch.%s.remote", branch->name);
 997                git_config_set_multivar(buf.buf, NULL, NULL, 1);
 998                strbuf_reset(&buf);
 999                strbuf_addf(&buf, "branch.%s.merge", branch->name);
1000                git_config_set_multivar(buf.buf, NULL, NULL, 1);
1001                strbuf_release(&buf);
1002        } else if (argc > 0 && argc <= 2) {
1003                struct branch *branch = branch_get(argv[0]);
1004                int branch_existed = 0, remote_tracking = 0;
1005                struct strbuf buf = STRBUF_INIT;
1006
1007                if (!strcmp(argv[0], "HEAD"))
1008                        die(_("it does not make sense to create 'HEAD' manually"));
1009
1010                if (!branch)
1011                        die(_("no such branch '%s'"), argv[0]);
1012
1013                if (kinds != REF_LOCAL_BRANCH)
1014                        die(_("-a and -r options to 'git branch' do not make sense with a branch name"));
1015
1016                if (track == BRANCH_TRACK_OVERRIDE)
1017                        fprintf(stderr, _("The --set-upstream flag is deprecated and will be removed. Consider using --track or --set-upstream-to\n"));
1018
1019                strbuf_addf(&buf, "refs/remotes/%s", branch->name);
1020                remote_tracking = ref_exists(buf.buf);
1021                strbuf_release(&buf);
1022
1023                branch_existed = ref_exists(branch->refname);
1024                create_branch(head, argv[0], (argc == 2) ? argv[1] : head,
1025                              force, reflog, 0, quiet, track);
1026
1027                /*
1028                 * We only show the instructions if the user gave us
1029                 * one branch which doesn't exist locally, but is the
1030                 * name of a remote-tracking branch.
1031                 */
1032                if (argc == 1 && track == BRANCH_TRACK_OVERRIDE &&
1033                    !branch_existed && remote_tracking) {
1034                        fprintf(stderr, _("\nIf you wanted to make '%s' track '%s', do this:\n\n"), head, branch->name);
1035                        fprintf(stderr, _("    git branch -d %s\n"), branch->name);
1036                        fprintf(stderr, _("    git branch --set-upstream-to %s\n"), branch->name);
1037                }
1038
1039        } else
1040                usage_with_options(builtin_branch_usage, options);
1041
1042        return 0;
1043}