Andrew's git / gitweb.git / builtin/branch.c
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builtin / branch.con commit pack-refs: merge code from pack-refs.{c,h} into refs.{c,h} (32d462c)
   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
  22static const char * const builtin_branch_usage[] = {
  23        N_("git branch [options] [-r | -a] [--merged | --no-merged]"),
  24        N_("git branch [options] [-l] [-f] <branchname> [<start-point>]"),
  25        N_("git branch [options] [-r] (-d | -D) <branchname>..."),
  26        N_("git branch [options] (-m | -M) [<oldbranch>] <newbranch>"),
  27        NULL
  28};
  29
  30#define REF_LOCAL_BRANCH    0x01
  31#define REF_REMOTE_BRANCH   0x02
  32
  33static const char *head;
  34static unsigned char head_sha1[20];
  35
  36static int branch_use_color = -1;
  37static char branch_colors[][COLOR_MAXLEN] = {
  38        GIT_COLOR_RESET,
  39        GIT_COLOR_NORMAL,       /* PLAIN */
  40        GIT_COLOR_RED,          /* REMOTE */
  41        GIT_COLOR_NORMAL,       /* LOCAL */
  42        GIT_COLOR_GREEN,        /* CURRENT */
  43};
  44enum color_branch {
  45        BRANCH_COLOR_RESET = 0,
  46        BRANCH_COLOR_PLAIN = 1,
  47        BRANCH_COLOR_REMOTE = 2,
  48        BRANCH_COLOR_LOCAL = 3,
  49        BRANCH_COLOR_CURRENT = 4
  50};
  51
  52static enum merge_filter {
  53        NO_FILTER = 0,
  54        SHOW_NOT_MERGED,
  55        SHOW_MERGED
  56} merge_filter;
  57static unsigned char merge_filter_ref[20];
  58
  59static struct string_list output = STRING_LIST_INIT_DUP;
  60static unsigned int colopts;
  61
  62static int parse_branch_color_slot(const char *var, int ofs)
  63{
  64        if (!strcasecmp(var+ofs, "plain"))
  65                return BRANCH_COLOR_PLAIN;
  66        if (!strcasecmp(var+ofs, "reset"))
  67                return BRANCH_COLOR_RESET;
  68        if (!strcasecmp(var+ofs, "remote"))
  69                return BRANCH_COLOR_REMOTE;
  70        if (!strcasecmp(var+ofs, "local"))
  71                return BRANCH_COLOR_LOCAL;
  72        if (!strcasecmp(var+ofs, "current"))
  73                return BRANCH_COLOR_CURRENT;
  74        return -1;
  75}
  76
  77static int git_branch_config(const char *var, const char *value, void *cb)
  78{
  79        if (!prefixcmp(var, "column."))
  80                return git_column_config(var, value, "branch", &colopts);
  81        if (!strcmp(var, "color.branch")) {
  82                branch_use_color = git_config_colorbool(var, value);
  83                return 0;
  84        }
  85        if (!prefixcmp(var, "color.branch.")) {
  86                int slot = parse_branch_color_slot(var, 13);
  87                if (slot < 0)
  88                        return 0;
  89                if (!value)
  90                        return config_error_nonbool(var);
  91                color_parse(value, var, branch_colors[slot]);
  92                return 0;
  93        }
  94        return git_color_default_config(var, value, cb);
  95}
  96
  97static const char *branch_get_color(enum color_branch ix)
  98{
  99        if (want_color(branch_use_color))
 100                return branch_colors[ix];
 101        return "";
 102}
 103
 104static int branch_merged(int kind, const char *name,
 105                         struct commit *rev, struct commit *head_rev)
 106{
 107        /*
 108         * This checks whether the merge bases of branch and HEAD (or
 109         * the other branch this branch builds upon) contains the
 110         * branch, which means that the branch has already been merged
 111         * safely to HEAD (or the other branch).
 112         */
 113        struct commit *reference_rev = NULL;
 114        const char *reference_name = NULL;
 115        void *reference_name_to_free = NULL;
 116        int merged;
 117
 118        if (kind == REF_LOCAL_BRANCH) {
 119                struct branch *branch = branch_get(name);
 120                unsigned char sha1[20];
 121
 122                if (branch &&
 123                    branch->merge &&
 124                    branch->merge[0] &&
 125                    branch->merge[0]->dst &&
 126                    (reference_name = reference_name_to_free =
 127                     resolve_refdup(branch->merge[0]->dst, sha1, 1, NULL)) != NULL)
 128                        reference_rev = lookup_commit_reference(sha1);
 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                               unsigned char *sha1, struct commit *head_rev,
 159                               int kinds, int force)
 160{
 161        struct commit *rev = lookup_commit_reference(sha1);
 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        unsigned char sha1[20];
 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
 196        switch (kinds) {
 197        case REF_REMOTE_BRANCH:
 198                fmt = "refs/remotes/%s";
 199                /* For subsequent UI messages */
 200                remote_branch = 1;
 201
 202                force = 1;
 203                break;
 204        case REF_LOCAL_BRANCH:
 205                fmt = "refs/heads/%s";
 206                break;
 207        default:
 208                die(_("cannot use -a with -d"));
 209        }
 210
 211        if (!force) {
 212                head_rev = lookup_commit_reference(head_sha1);
 213                if (!head_rev)
 214                        die(_("Couldn't look up commit object for HEAD"));
 215        }
 216        for (i = 0; i < argc; i++, strbuf_release(&bname)) {
 217                const char *target;
 218                int flags = 0;
 219
 220                strbuf_branchname(&bname, argv[i]);
 221                if (kinds == REF_LOCAL_BRANCH && !strcmp(head, bname.buf)) {
 222                        error(_("Cannot delete the branch '%s' "
 223                              "which you are currently on."), bname.buf);
 224                        ret = 1;
 225                        continue;
 226                }
 227
 228                free(name);
 229
 230                name = mkpathdup(fmt, bname.buf);
 231                target = resolve_ref_unsafe(name, sha1, 0, &flags);
 232                if (!target ||
 233                    (!(flags & REF_ISSYMREF) && is_null_sha1(sha1))) {
 234                        error(remote_branch
 235                              ? _("remote branch '%s' not found.")
 236                              : _("branch '%s' not found."), bname.buf);
 237                        ret = 1;
 238                        continue;
 239                }
 240
 241                if (!(flags & REF_ISSYMREF) &&
 242                    check_branch_commit(bname.buf, name, sha1, head_rev, kinds,
 243                                        force)) {
 244                        ret = 1;
 245                        continue;
 246                }
 247
 248                if (delete_ref(name, sha1, REF_NODEREF)) {
 249                        error(remote_branch
 250                              ? _("Error deleting remote branch '%s'")
 251                              : _("Error deleting branch '%s'"),
 252                              bname.buf);
 253                        ret = 1;
 254                        continue;
 255                }
 256                if (!quiet) {
 257                        printf(remote_branch
 258                               ? _("Deleted remote branch %s (was %s).\n")
 259                               : _("Deleted branch %s (was %s).\n"),
 260                               bname.buf,
 261                               (flags & REF_ISSYMREF)
 262                               ? target
 263                               : find_unique_abbrev(sha1, DEFAULT_ABBREV));
 264                }
 265                delete_branch_config(bname.buf);
 266        }
 267
 268        free(name);
 269
 270        return(ret);
 271}
 272
 273struct ref_item {
 274        char *name;
 275        char *dest;
 276        unsigned int kind, width;
 277        struct commit *commit;
 278};
 279
 280struct ref_list {
 281        struct rev_info revs;
 282        int index, alloc, maxwidth, verbose, abbrev;
 283        struct ref_item *list;
 284        struct commit_list *with_commit;
 285        int kinds;
 286};
 287
 288static char *resolve_symref(const char *src, const char *prefix)
 289{
 290        unsigned char sha1[20];
 291        int flag;
 292        const char *dst, *cp;
 293
 294        dst = resolve_ref_unsafe(src, sha1, 0, &flag);
 295        if (!(dst && (flag & REF_ISSYMREF)))
 296                return NULL;
 297        if (prefix && (cp = skip_prefix(dst, prefix)))
 298                dst = cp;
 299        return xstrdup(dst);
 300}
 301
 302struct append_ref_cb {
 303        struct ref_list *ref_list;
 304        const char **pattern;
 305        int ret;
 306};
 307
 308static int match_patterns(const char **pattern, const char *refname)
 309{
 310        if (!*pattern)
 311                return 1; /* no pattern always matches */
 312        while (*pattern) {
 313                if (!fnmatch(*pattern, refname, 0))
 314                        return 1;
 315                pattern++;
 316        }
 317        return 0;
 318}
 319
 320static int append_ref(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
 321{
 322        struct append_ref_cb *cb = (struct append_ref_cb *)(cb_data);
 323        struct ref_list *ref_list = cb->ref_list;
 324        struct ref_item *newitem;
 325        struct commit *commit;
 326        int kind, i;
 327        const char *prefix, *orig_refname = refname;
 328
 329        static struct {
 330                int kind;
 331                const char *prefix;
 332                int pfxlen;
 333        } ref_kind[] = {
 334                { REF_LOCAL_BRANCH, "refs/heads/", 11 },
 335                { REF_REMOTE_BRANCH, "refs/remotes/", 13 },
 336        };
 337
 338        /* Detect kind */
 339        for (i = 0; i < ARRAY_SIZE(ref_kind); i++) {
 340                prefix = ref_kind[i].prefix;
 341                if (strncmp(refname, prefix, ref_kind[i].pfxlen))
 342                        continue;
 343                kind = ref_kind[i].kind;
 344                refname += ref_kind[i].pfxlen;
 345                break;
 346        }
 347        if (ARRAY_SIZE(ref_kind) <= i)
 348                return 0;
 349
 350        /* Don't add types the caller doesn't want */
 351        if ((kind & ref_list->kinds) == 0)
 352                return 0;
 353
 354        if (!match_patterns(cb->pattern, refname))
 355                return 0;
 356
 357        commit = NULL;
 358        if (ref_list->verbose || ref_list->with_commit || merge_filter != NO_FILTER) {
 359                commit = lookup_commit_reference_gently(sha1, 1);
 360                if (!commit) {
 361                        cb->ret = error(_("branch '%s' does not point at a commit"), refname);
 362                        return 0;
 363                }
 364
 365                /* Filter with with_commit if specified */
 366                if (!is_descendant_of(commit, ref_list->with_commit))
 367                        return 0;
 368
 369                if (merge_filter != NO_FILTER)
 370                        add_pending_object(&ref_list->revs,
 371                                           (struct object *)commit, refname);
 372        }
 373
 374        ALLOC_GROW(ref_list->list, ref_list->index + 1, ref_list->alloc);
 375
 376        /* Record the new item */
 377        newitem = &(ref_list->list[ref_list->index++]);
 378        newitem->name = xstrdup(refname);
 379        newitem->kind = kind;
 380        newitem->commit = commit;
 381        newitem->width = utf8_strwidth(refname);
 382        newitem->dest = resolve_symref(orig_refname, prefix);
 383        /* adjust for "remotes/" */
 384        if (newitem->kind == REF_REMOTE_BRANCH &&
 385            ref_list->kinds != REF_REMOTE_BRANCH)
 386                newitem->width += 8;
 387        if (newitem->width > ref_list->maxwidth)
 388                ref_list->maxwidth = newitem->width;
 389
 390        return 0;
 391}
 392
 393static void free_ref_list(struct ref_list *ref_list)
 394{
 395        int i;
 396
 397        for (i = 0; i < ref_list->index; i++) {
 398                free(ref_list->list[i].name);
 399                free(ref_list->list[i].dest);
 400        }
 401        free(ref_list->list);
 402}
 403
 404static int ref_cmp(const void *r1, const void *r2)
 405{
 406        struct ref_item *c1 = (struct ref_item *)(r1);
 407        struct ref_item *c2 = (struct ref_item *)(r2);
 408
 409        if (c1->kind != c2->kind)
 410                return c1->kind - c2->kind;
 411        return strcmp(c1->name, c2->name);
 412}
 413
 414static void fill_tracking_info(struct strbuf *stat, const char *branch_name,
 415                int show_upstream_ref)
 416{
 417        int ours, theirs;
 418        char *ref = NULL;
 419        struct branch *branch = branch_get(branch_name);
 420
 421        if (!stat_tracking_info(branch, &ours, &theirs)) {
 422                if (branch && branch->merge && branch->merge[0]->dst &&
 423                    show_upstream_ref)
 424                        strbuf_addf(stat, "[%s] ",
 425                            shorten_unambiguous_ref(branch->merge[0]->dst, 0));
 426                return;
 427        }
 428
 429        if (show_upstream_ref)
 430                ref = shorten_unambiguous_ref(branch->merge[0]->dst, 0);
 431        if (!ours) {
 432                if (ref)
 433                        strbuf_addf(stat, _("[%s: behind %d]"), ref, theirs);
 434                else
 435                        strbuf_addf(stat, _("[behind %d]"), theirs);
 436
 437        } else if (!theirs) {
 438                if (ref)
 439                        strbuf_addf(stat, _("[%s: ahead %d]"), ref, ours);
 440                else
 441                        strbuf_addf(stat, _("[ahead %d]"), ours);
 442        } else {
 443                if (ref)
 444                        strbuf_addf(stat, _("[%s: ahead %d, behind %d]"),
 445                                    ref, ours, theirs);
 446                else
 447                        strbuf_addf(stat, _("[ahead %d, behind %d]"),
 448                                    ours, theirs);
 449        }
 450        strbuf_addch(stat, ' ');
 451        free(ref);
 452}
 453
 454static int matches_merge_filter(struct commit *commit)
 455{
 456        int is_merged;
 457
 458        if (merge_filter == NO_FILTER)
 459                return 1;
 460
 461        is_merged = !!(commit->object.flags & UNINTERESTING);
 462        return (is_merged == (merge_filter == SHOW_MERGED));
 463}
 464
 465static void add_verbose_info(struct strbuf *out, struct ref_item *item,
 466                             int verbose, int abbrev)
 467{
 468        struct strbuf subject = STRBUF_INIT, stat = STRBUF_INIT;
 469        const char *sub = " **** invalid ref ****";
 470        struct commit *commit = item->commit;
 471
 472        if (commit && !parse_commit(commit)) {
 473                pp_commit_easy(CMIT_FMT_ONELINE, commit, &subject);
 474                sub = subject.buf;
 475        }
 476
 477        if (item->kind == REF_LOCAL_BRANCH)
 478                fill_tracking_info(&stat, item->name, verbose > 1);
 479
 480        strbuf_addf(out, " %s %s%s",
 481                find_unique_abbrev(item->commit->object.sha1, abbrev),
 482                stat.buf, sub);
 483        strbuf_release(&stat);
 484        strbuf_release(&subject);
 485}
 486
 487static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
 488                           int abbrev, int current, char *prefix)
 489{
 490        char c;
 491        int color;
 492        struct commit *commit = item->commit;
 493        struct strbuf out = STRBUF_INIT, name = STRBUF_INIT;
 494
 495        if (!matches_merge_filter(commit))
 496                return;
 497
 498        switch (item->kind) {
 499        case REF_LOCAL_BRANCH:
 500                color = BRANCH_COLOR_LOCAL;
 501                break;
 502        case REF_REMOTE_BRANCH:
 503                color = BRANCH_COLOR_REMOTE;
 504                break;
 505        default:
 506                color = BRANCH_COLOR_PLAIN;
 507                break;
 508        }
 509
 510        c = ' ';
 511        if (current) {
 512                c = '*';
 513                color = BRANCH_COLOR_CURRENT;
 514        }
 515
 516        strbuf_addf(&name, "%s%s", prefix, item->name);
 517        if (verbose) {
 518                int utf8_compensation = strlen(name.buf) - utf8_strwidth(name.buf);
 519                strbuf_addf(&out, "%c %s%-*s%s", c, branch_get_color(color),
 520                            maxwidth + utf8_compensation, name.buf,
 521                            branch_get_color(BRANCH_COLOR_RESET));
 522        } else
 523                strbuf_addf(&out, "%c %s%s%s", c, branch_get_color(color),
 524                            name.buf, branch_get_color(BRANCH_COLOR_RESET));
 525
 526        if (item->dest)
 527                strbuf_addf(&out, " -> %s", item->dest);
 528        else if (verbose)
 529                /* " f7c0c00 [ahead 58, behind 197] vcs-svn: drop obj_pool.h" */
 530                add_verbose_info(&out, item, verbose, abbrev);
 531        if (column_active(colopts)) {
 532                assert(!verbose && "--column and --verbose are incompatible");
 533                string_list_append(&output, out.buf);
 534        } else {
 535                printf("%s\n", out.buf);
 536        }
 537        strbuf_release(&name);
 538        strbuf_release(&out);
 539}
 540
 541static int calc_maxwidth(struct ref_list *refs)
 542{
 543        int i, w = 0;
 544        for (i = 0; i < refs->index; i++) {
 545                if (!matches_merge_filter(refs->list[i].commit))
 546                        continue;
 547                if (refs->list[i].width > w)
 548                        w = refs->list[i].width;
 549        }
 550        return w;
 551}
 552
 553
 554static void show_detached(struct ref_list *ref_list)
 555{
 556        struct commit *head_commit = lookup_commit_reference_gently(head_sha1, 1);
 557
 558        if (head_commit && is_descendant_of(head_commit, ref_list->with_commit)) {
 559                struct ref_item item;
 560                item.name = xstrdup(_("(no branch)"));
 561                item.width = utf8_strwidth(item.name);
 562                item.kind = REF_LOCAL_BRANCH;
 563                item.dest = NULL;
 564                item.commit = head_commit;
 565                if (item.width > ref_list->maxwidth)
 566                        ref_list->maxwidth = item.width;
 567                print_ref_item(&item, ref_list->maxwidth, ref_list->verbose, ref_list->abbrev, 1, "");
 568                free(item.name);
 569        }
 570}
 571
 572static int print_ref_list(int kinds, int detached, int verbose, int abbrev, struct commit_list *with_commit, const char **pattern)
 573{
 574        int i;
 575        struct append_ref_cb cb;
 576        struct ref_list ref_list;
 577
 578        memset(&ref_list, 0, sizeof(ref_list));
 579        ref_list.kinds = kinds;
 580        ref_list.verbose = verbose;
 581        ref_list.abbrev = abbrev;
 582        ref_list.with_commit = with_commit;
 583        if (merge_filter != NO_FILTER)
 584                init_revisions(&ref_list.revs, NULL);
 585        cb.ref_list = &ref_list;
 586        cb.pattern = pattern;
 587        cb.ret = 0;
 588        for_each_rawref(append_ref, &cb);
 589        if (merge_filter != NO_FILTER) {
 590                struct commit *filter;
 591                filter = lookup_commit_reference_gently(merge_filter_ref, 0);
 592                if (!filter)
 593                        die("object '%s' does not point to a commit",
 594                            sha1_to_hex(merge_filter_ref));
 595
 596                filter->object.flags |= UNINTERESTING;
 597                add_pending_object(&ref_list.revs,
 598                                   (struct object *) filter, "");
 599                ref_list.revs.limited = 1;
 600                prepare_revision_walk(&ref_list.revs);
 601                if (verbose)
 602                        ref_list.maxwidth = calc_maxwidth(&ref_list);
 603        }
 604
 605        qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp);
 606
 607        detached = (detached && (kinds & REF_LOCAL_BRANCH));
 608        if (detached && match_patterns(pattern, "HEAD"))
 609                show_detached(&ref_list);
 610
 611        for (i = 0; i < ref_list.index; i++) {
 612                int current = !detached &&
 613                        (ref_list.list[i].kind == REF_LOCAL_BRANCH) &&
 614                        !strcmp(ref_list.list[i].name, head);
 615                char *prefix = (kinds != REF_REMOTE_BRANCH &&
 616                                ref_list.list[i].kind == REF_REMOTE_BRANCH)
 617                                ? "remotes/" : "";
 618                print_ref_item(&ref_list.list[i], ref_list.maxwidth, verbose,
 619                               abbrev, current, prefix);
 620        }
 621
 622        free_ref_list(&ref_list);
 623
 624        if (cb.ret)
 625                error(_("some refs could not be read"));
 626
 627        return cb.ret;
 628}
 629
 630static void rename_branch(const char *oldname, const char *newname, int force)
 631{
 632        struct strbuf oldref = STRBUF_INIT, newref = STRBUF_INIT, logmsg = STRBUF_INIT;
 633        struct strbuf oldsection = STRBUF_INIT, newsection = STRBUF_INIT;
 634        int recovery = 0;
 635        int clobber_head_ok;
 636
 637        if (!oldname)
 638                die(_("cannot rename the current branch while not on any."));
 639
 640        if (strbuf_check_branch_ref(&oldref, oldname)) {
 641                /*
 642                 * Bad name --- this could be an attempt to rename a
 643                 * ref that we used to allow to be created by accident.
 644                 */
 645                if (ref_exists(oldref.buf))
 646                        recovery = 1;
 647                else
 648                        die(_("Invalid branch name: '%s'"), oldname);
 649        }
 650
 651        /*
 652         * A command like "git branch -M currentbranch currentbranch" cannot
 653         * cause the worktree to become inconsistent with HEAD, so allow it.
 654         */
 655        clobber_head_ok = !strcmp(oldname, newname);
 656
 657        validate_new_branchname(newname, &newref, force, clobber_head_ok);
 658
 659        strbuf_addf(&logmsg, "Branch: renamed %s to %s",
 660                 oldref.buf, newref.buf);
 661
 662        if (rename_ref(oldref.buf, newref.buf, logmsg.buf))
 663                die(_("Branch rename failed"));
 664        strbuf_release(&logmsg);
 665
 666        if (recovery)
 667                warning(_("Renamed a misnamed branch '%s' away"), oldref.buf + 11);
 668
 669        /* no need to pass logmsg here as HEAD didn't really move */
 670        if (!strcmp(oldname, head) && create_symref("HEAD", newref.buf, NULL))
 671                die(_("Branch renamed to %s, but HEAD is not updated!"), newname);
 672
 673        strbuf_addf(&oldsection, "branch.%s", oldref.buf + 11);
 674        strbuf_release(&oldref);
 675        strbuf_addf(&newsection, "branch.%s", newref.buf + 11);
 676        strbuf_release(&newref);
 677        if (git_config_rename_section(oldsection.buf, newsection.buf) < 0)
 678                die(_("Branch is renamed, but update of config-file failed"));
 679        strbuf_release(&oldsection);
 680        strbuf_release(&newsection);
 681}
 682
 683static int opt_parse_merge_filter(const struct option *opt, const char *arg, int unset)
 684{
 685        merge_filter = ((opt->long_name[0] == 'n')
 686                        ? SHOW_NOT_MERGED
 687                        : SHOW_MERGED);
 688        if (unset)
 689                merge_filter = SHOW_NOT_MERGED; /* b/c for --no-merged */
 690        if (!arg)
 691                arg = "HEAD";
 692        if (get_sha1(arg, merge_filter_ref))
 693                die(_("malformed object name %s"), arg);
 694        return 0;
 695}
 696
 697static const char edit_description[] = "BRANCH_DESCRIPTION";
 698
 699static int edit_branch_description(const char *branch_name)
 700{
 701        FILE *fp;
 702        int status;
 703        struct strbuf buf = STRBUF_INIT;
 704        struct strbuf name = STRBUF_INIT;
 705
 706        read_branch_desc(&buf, branch_name);
 707        if (!buf.len || buf.buf[buf.len-1] != '\n')
 708                strbuf_addch(&buf, '\n');
 709        strbuf_addf(&buf,
 710                    "# Please edit the description for the branch\n"
 711                    "#   %s\n"
 712                    "# Lines starting with '#' will be stripped.\n",
 713                    branch_name);
 714        fp = fopen(git_path(edit_description), "w");
 715        if ((fwrite(buf.buf, 1, buf.len, fp) < buf.len) || fclose(fp)) {
 716                strbuf_release(&buf);
 717                return error(_("could not write branch description template: %s"),
 718                             strerror(errno));
 719        }
 720        strbuf_reset(&buf);
 721        if (launch_editor(git_path(edit_description), &buf, NULL)) {
 722                strbuf_release(&buf);
 723                return -1;
 724        }
 725        stripspace(&buf, 1);
 726
 727        strbuf_addf(&name, "branch.%s.description", branch_name);
 728        status = git_config_set(name.buf, buf.buf);
 729        strbuf_release(&name);
 730        strbuf_release(&buf);
 731
 732        return status;
 733}
 734
 735int cmd_branch(int argc, const char **argv, const char *prefix)
 736{
 737        int delete = 0, rename = 0, force_create = 0, list = 0;
 738        int verbose = 0, abbrev = -1, detached = 0;
 739        int reflog = 0, edit_description = 0;
 740        int quiet = 0, unset_upstream = 0;
 741        const char *new_upstream = NULL;
 742        enum branch_track track;
 743        int kinds = REF_LOCAL_BRANCH;
 744        struct commit_list *with_commit = NULL;
 745
 746        struct option options[] = {
 747                OPT_GROUP(N_("Generic options")),
 748                OPT__VERBOSE(&verbose,
 749                        N_("show hash and subject, give twice for upstream branch")),
 750                OPT__QUIET(&quiet, N_("suppress informational messages")),
 751                OPT_SET_INT('t', "track",  &track, N_("set up tracking mode (see git-pull(1))"),
 752                        BRANCH_TRACK_EXPLICIT),
 753                OPT_SET_INT( 0, "set-upstream",  &track, N_("change upstream info"),
 754                        BRANCH_TRACK_OVERRIDE),
 755                OPT_STRING('u', "set-upstream-to", &new_upstream, "upstream", "change the upstream info"),
 756                OPT_BOOLEAN(0, "unset-upstream", &unset_upstream, "Unset the upstream info"),
 757                OPT__COLOR(&branch_use_color, N_("use colored output")),
 758                OPT_SET_INT('r', "remotes",     &kinds, N_("act on remote-tracking branches"),
 759                        REF_REMOTE_BRANCH),
 760                {
 761                        OPTION_CALLBACK, 0, "contains", &with_commit, N_("commit"),
 762                        N_("print only branches that contain the commit"),
 763                        PARSE_OPT_LASTARG_DEFAULT,
 764                        parse_opt_with_commit, (intptr_t)"HEAD",
 765                },
 766                {
 767                        OPTION_CALLBACK, 0, "with", &with_commit, N_("commit"),
 768                        N_("print only branches that contain the commit"),
 769                        PARSE_OPT_HIDDEN | PARSE_OPT_LASTARG_DEFAULT,
 770                        parse_opt_with_commit, (intptr_t) "HEAD",
 771                },
 772                OPT__ABBREV(&abbrev),
 773
 774                OPT_GROUP(N_("Specific git-branch actions:")),
 775                OPT_SET_INT('a', "all", &kinds, N_("list both remote-tracking and local branches"),
 776                        REF_REMOTE_BRANCH | REF_LOCAL_BRANCH),
 777                OPT_BIT('d', "delete", &delete, N_("delete fully merged branch"), 1),
 778                OPT_BIT('D', NULL, &delete, N_("delete branch (even if not merged)"), 2),
 779                OPT_BIT('m', "move", &rename, N_("move/rename a branch and its reflog"), 1),
 780                OPT_BIT('M', NULL, &rename, N_("move/rename a branch, even if target exists"), 2),
 781                OPT_BOOLEAN(0, "list", &list, N_("list branch names")),
 782                OPT_BOOLEAN('l', "create-reflog", &reflog, N_("create the branch's reflog")),
 783                OPT_BOOLEAN(0, "edit-description", &edit_description,
 784                            N_("edit the description for the branch")),
 785                OPT__FORCE(&force_create, N_("force creation (when already exists)")),
 786                {
 787                        OPTION_CALLBACK, 0, "no-merged", &merge_filter_ref,
 788                        N_("commit"), N_("print only not merged branches"),
 789                        PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
 790                        opt_parse_merge_filter, (intptr_t) "HEAD",
 791                },
 792                {
 793                        OPTION_CALLBACK, 0, "merged", &merge_filter_ref,
 794                        N_("commit"), N_("print only merged branches"),
 795                        PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
 796                        opt_parse_merge_filter, (intptr_t) "HEAD",
 797                },
 798                OPT_COLUMN(0, "column", &colopts, N_("list branches in columns")),
 799                OPT_END(),
 800        };
 801
 802        if (argc == 2 && !strcmp(argv[1], "-h"))
 803                usage_with_options(builtin_branch_usage, options);
 804
 805        git_config(git_branch_config, NULL);
 806
 807        track = git_branch_track;
 808
 809        head = resolve_refdup("HEAD", head_sha1, 0, NULL);
 810        if (!head)
 811                die(_("Failed to resolve HEAD as a valid ref."));
 812        if (!strcmp(head, "HEAD")) {
 813                detached = 1;
 814        } else {
 815                if (prefixcmp(head, "refs/heads/"))
 816                        die(_("HEAD not found below refs/heads!"));
 817                head += 11;
 818        }
 819        hashcpy(merge_filter_ref, head_sha1);
 820
 821
 822        argc = parse_options(argc, argv, prefix, options, builtin_branch_usage,
 823                             0);
 824
 825        if (!delete && !rename && !edit_description && !new_upstream && !unset_upstream && argc == 0)
 826                list = 1;
 827
 828        if (!!delete + !!rename + !!force_create + !!list + !!new_upstream + !!unset_upstream > 1)
 829                usage_with_options(builtin_branch_usage, options);
 830
 831        if (abbrev == -1)
 832                abbrev = DEFAULT_ABBREV;
 833        finalize_colopts(&colopts, -1);
 834        if (verbose) {
 835                if (explicitly_enable_column(colopts))
 836                        die(_("--column and --verbose are incompatible"));
 837                colopts = 0;
 838        }
 839
 840        if (delete)
 841                return delete_branches(argc, argv, delete > 1, kinds, quiet);
 842        else if (list) {
 843                int ret = print_ref_list(kinds, detached, verbose, abbrev,
 844                                         with_commit, argv);
 845                print_columns(&output, colopts, NULL);
 846                string_list_clear(&output, 0);
 847                return ret;
 848        }
 849        else if (edit_description) {
 850                const char *branch_name;
 851                struct strbuf branch_ref = STRBUF_INIT;
 852
 853                if (!argc) {
 854                        if (detached)
 855                                die("Cannot give description to detached HEAD");
 856                        branch_name = head;
 857                } else if (argc == 1)
 858                        branch_name = argv[0];
 859                else
 860                        usage_with_options(builtin_branch_usage, options);
 861
 862                strbuf_addf(&branch_ref, "refs/heads/%s", branch_name);
 863                if (!ref_exists(branch_ref.buf)) {
 864                        strbuf_release(&branch_ref);
 865
 866                        if (!argc)
 867                                return error("No commit on branch '%s' yet.",
 868                                             branch_name);
 869                        else
 870                                return error("No such branch '%s'.", branch_name);
 871                }
 872                strbuf_release(&branch_ref);
 873
 874                if (edit_branch_description(branch_name))
 875                        return 1;
 876        } else if (rename) {
 877                if (argc == 1)
 878                        rename_branch(head, argv[0], rename > 1);
 879                else if (argc == 2)
 880                        rename_branch(argv[0], argv[1], rename > 1);
 881                else
 882                        usage_with_options(builtin_branch_usage, options);
 883        } else if (new_upstream) {
 884                struct branch *branch = branch_get(argv[0]);
 885
 886                if (!ref_exists(branch->refname))
 887                        die(_("branch '%s' does not exist"), branch->name);
 888
 889                /*
 890                 * create_branch takes care of setting up the tracking
 891                 * info and making sure new_upstream is correct
 892                 */
 893                create_branch(head, branch->name, new_upstream, 0, 0, 0, quiet, BRANCH_TRACK_OVERRIDE);
 894        } else if (unset_upstream) {
 895                struct branch *branch = branch_get(argv[0]);
 896                struct strbuf buf = STRBUF_INIT;
 897
 898                if (!branch_has_merge_config(branch)) {
 899                        die(_("Branch '%s' has no upstream information"), branch->name);
 900                }
 901
 902                strbuf_addf(&buf, "branch.%s.remote", branch->name);
 903                git_config_set_multivar(buf.buf, NULL, NULL, 1);
 904                strbuf_reset(&buf);
 905                strbuf_addf(&buf, "branch.%s.merge", branch->name);
 906                git_config_set_multivar(buf.buf, NULL, NULL, 1);
 907                strbuf_release(&buf);
 908        } else if (argc > 0 && argc <= 2) {
 909                struct branch *branch = branch_get(argv[0]);
 910                int branch_existed = 0, remote_tracking = 0;
 911                struct strbuf buf = STRBUF_INIT;
 912
 913                if (kinds != REF_LOCAL_BRANCH)
 914                        die(_("-a and -r options to 'git branch' do not make sense with a branch name"));
 915
 916                if (track == BRANCH_TRACK_OVERRIDE)
 917                        fprintf(stderr, _("The --set-upstream flag is deprecated and will be removed. Consider using --track or --set-upstream-to\n"));
 918
 919                strbuf_addf(&buf, "refs/remotes/%s", branch->name);
 920                remote_tracking = ref_exists(buf.buf);
 921                strbuf_release(&buf);
 922
 923                branch_existed = ref_exists(branch->refname);
 924                create_branch(head, argv[0], (argc == 2) ? argv[1] : head,
 925                              force_create, reflog, 0, quiet, track);
 926
 927                /*
 928                 * We only show the instructions if the user gave us
 929                 * one branch which doesn't exist locally, but is the
 930                 * name of a remote-tracking branch.
 931                 */
 932                if (argc == 1 && track == BRANCH_TRACK_OVERRIDE &&
 933                    !branch_existed && remote_tracking) {
 934                        fprintf(stderr, _("\nIf you wanted to make '%s' track '%s', do this:\n\n"), head, branch->name);
 935                        fprintf(stderr, _("    git branch -d %s\n"), branch->name);
 936                        fprintf(stderr, _("    git branch --set-upstream-to %s\n"), branch->name);
 937                }
 938
 939        } else
 940                usage_with_options(builtin_branch_usage, options);
 941
 942        return 0;
 943}