Andrew's git / gitweb.git / builtin-branch.c
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builtin-branch.con commit Merge git://repo.or.cz/git-gui (731ab1f)
   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
  19static const char * const builtin_branch_usage[] = {
  20        "git branch [options] [-r | -a] [--merged | --no-merged]",
  21        "git branch [options] [-l] [-f] <branchname> [<start-point>]",
  22        "git branch [options] [-r] (-d | -D) <branchname>",
  23        "git branch [options] (-m | -M) [<oldbranch>] <newbranch>",
  24        NULL
  25};
  26
  27#define REF_LOCAL_BRANCH    0x01
  28#define REF_REMOTE_BRANCH   0x02
  29
  30static const char *head;
  31static unsigned char head_sha1[20];
  32
  33static int branch_use_color = -1;
  34static char branch_colors[][COLOR_MAXLEN] = {
  35        "\033[m",       /* reset */
  36        "",             /* PLAIN (normal) */
  37        "\033[31m",     /* REMOTE (red) */
  38        "",             /* LOCAL (normal) */
  39        "\033[32m",     /* CURRENT (green) */
  40};
  41enum color_branch {
  42        COLOR_BRANCH_RESET = 0,
  43        COLOR_BRANCH_PLAIN = 1,
  44        COLOR_BRANCH_REMOTE = 2,
  45        COLOR_BRANCH_LOCAL = 3,
  46        COLOR_BRANCH_CURRENT = 4,
  47};
  48
  49static enum merge_filter {
  50        NO_FILTER = 0,
  51        SHOW_NOT_MERGED,
  52        SHOW_MERGED,
  53} merge_filter;
  54static unsigned char merge_filter_ref[20];
  55
  56static int parse_branch_color_slot(const char *var, int ofs)
  57{
  58        if (!strcasecmp(var+ofs, "plain"))
  59                return COLOR_BRANCH_PLAIN;
  60        if (!strcasecmp(var+ofs, "reset"))
  61                return COLOR_BRANCH_RESET;
  62        if (!strcasecmp(var+ofs, "remote"))
  63                return COLOR_BRANCH_REMOTE;
  64        if (!strcasecmp(var+ofs, "local"))
  65                return COLOR_BRANCH_LOCAL;
  66        if (!strcasecmp(var+ofs, "current"))
  67                return COLOR_BRANCH_CURRENT;
  68        die("bad config variable '%s'", var);
  69}
  70
  71static int git_branch_config(const char *var, const char *value, void *cb)
  72{
  73        if (!strcmp(var, "color.branch")) {
  74                branch_use_color = git_config_colorbool(var, value, -1);
  75                return 0;
  76        }
  77        if (!prefixcmp(var, "color.branch.")) {
  78                int slot = parse_branch_color_slot(var, 13);
  79                if (!value)
  80                        return config_error_nonbool(var);
  81                color_parse(value, var, branch_colors[slot]);
  82                return 0;
  83        }
  84        return git_color_default_config(var, value, cb);
  85}
  86
  87static const char *branch_get_color(enum color_branch ix)
  88{
  89        if (branch_use_color > 0)
  90                return branch_colors[ix];
  91        return "";
  92}
  93
  94static int delete_branches(int argc, const char **argv, int force, int kinds)
  95{
  96        struct commit *rev, *head_rev = head_rev;
  97        unsigned char sha1[20];
  98        char *name = NULL;
  99        const char *fmt, *remote;
 100        char section[PATH_MAX];
 101        int i;
 102        int ret = 0;
 103
 104        switch (kinds) {
 105        case REF_REMOTE_BRANCH:
 106                fmt = "refs/remotes/%s";
 107                remote = "remote ";
 108                force = 1;
 109                break;
 110        case REF_LOCAL_BRANCH:
 111                fmt = "refs/heads/%s";
 112                remote = "";
 113                break;
 114        default:
 115                die("cannot use -a with -d");
 116        }
 117
 118        if (!force) {
 119                head_rev = lookup_commit_reference(head_sha1);
 120                if (!head_rev)
 121                        die("Couldn't look up commit object for HEAD");
 122        }
 123        for (i = 0; i < argc; i++) {
 124                if (kinds == REF_LOCAL_BRANCH && !strcmp(head, argv[i])) {
 125                        error("Cannot delete the branch '%s' "
 126                                "which you are currently on.", argv[i]);
 127                        ret = 1;
 128                        continue;
 129                }
 130
 131                free(name);
 132
 133                name = xstrdup(mkpath(fmt, argv[i]));
 134                if (!resolve_ref(name, sha1, 1, NULL)) {
 135                        error("%sbranch '%s' not found.",
 136                                        remote, argv[i]);
 137                        ret = 1;
 138                        continue;
 139                }
 140
 141                rev = lookup_commit_reference(sha1);
 142                if (!rev) {
 143                        error("Couldn't look up commit object for '%s'", name);
 144                        ret = 1;
 145                        continue;
 146                }
 147
 148                /* This checks whether the merge bases of branch and
 149                 * HEAD contains branch -- which means that the HEAD
 150                 * contains everything in both.
 151                 */
 152
 153                if (!force &&
 154                    !in_merge_bases(rev, &head_rev, 1)) {
 155                        error("The branch '%s' is not an ancestor of "
 156                                "your current HEAD.\n"
 157                                "If you are sure you want to delete it, "
 158                                "run 'git branch -D %s'.", argv[i], argv[i]);
 159                        ret = 1;
 160                        continue;
 161                }
 162
 163                if (delete_ref(name, sha1)) {
 164                        error("Error deleting %sbranch '%s'", remote,
 165                               argv[i]);
 166                        ret = 1;
 167                } else {
 168                        printf("Deleted %sbranch %s.\n", remote, argv[i]);
 169                        snprintf(section, sizeof(section), "branch.%s",
 170                                 argv[i]);
 171                        if (git_config_rename_section(section, NULL) < 0)
 172                                warning("Update of config-file failed");
 173                }
 174        }
 175
 176        free(name);
 177
 178        return(ret);
 179}
 180
 181struct ref_item {
 182        char *name;
 183        unsigned int kind;
 184        struct commit *commit;
 185};
 186
 187struct ref_list {
 188        struct rev_info revs;
 189        int index, alloc, maxwidth;
 190        struct ref_item *list;
 191        struct commit_list *with_commit;
 192        int kinds;
 193};
 194
 195static int has_commit(struct commit *commit, struct commit_list *with_commit)
 196{
 197        if (!with_commit)
 198                return 1;
 199        while (with_commit) {
 200                struct commit *other;
 201
 202                other = with_commit->item;
 203                with_commit = with_commit->next;
 204                if (in_merge_bases(other, &commit, 1))
 205                        return 1;
 206        }
 207        return 0;
 208}
 209
 210static int append_ref(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
 211{
 212        struct ref_list *ref_list = (struct ref_list*)(cb_data);
 213        struct ref_item *newitem;
 214        struct commit *commit;
 215        int kind;
 216        int len;
 217
 218        /* Detect kind */
 219        if (!prefixcmp(refname, "refs/heads/")) {
 220                kind = REF_LOCAL_BRANCH;
 221                refname += 11;
 222        } else if (!prefixcmp(refname, "refs/remotes/")) {
 223                kind = REF_REMOTE_BRANCH;
 224                refname += 13;
 225        } else
 226                return 0;
 227
 228        commit = lookup_commit_reference_gently(sha1, 1);
 229        if (!commit)
 230                return error("branch '%s' does not point at a commit", refname);
 231
 232        /* Filter with with_commit if specified */
 233        if (!has_commit(commit, ref_list->with_commit))
 234                return 0;
 235
 236        /* Don't add types the caller doesn't want */
 237        if ((kind & ref_list->kinds) == 0)
 238                return 0;
 239
 240        if (merge_filter != NO_FILTER)
 241                add_pending_object(&ref_list->revs,
 242                                   (struct object *)commit, refname);
 243
 244        /* Resize buffer */
 245        if (ref_list->index >= ref_list->alloc) {
 246                ref_list->alloc = alloc_nr(ref_list->alloc);
 247                ref_list->list = xrealloc(ref_list->list,
 248                                ref_list->alloc * sizeof(struct ref_item));
 249        }
 250
 251        /* Record the new item */
 252        newitem = &(ref_list->list[ref_list->index++]);
 253        newitem->name = xstrdup(refname);
 254        newitem->kind = kind;
 255        newitem->commit = commit;
 256        len = strlen(newitem->name);
 257        if (len > ref_list->maxwidth)
 258                ref_list->maxwidth = len;
 259
 260        return 0;
 261}
 262
 263static void free_ref_list(struct ref_list *ref_list)
 264{
 265        int i;
 266
 267        for (i = 0; i < ref_list->index; i++)
 268                free(ref_list->list[i].name);
 269        free(ref_list->list);
 270}
 271
 272static int ref_cmp(const void *r1, const void *r2)
 273{
 274        struct ref_item *c1 = (struct ref_item *)(r1);
 275        struct ref_item *c2 = (struct ref_item *)(r2);
 276
 277        if (c1->kind != c2->kind)
 278                return c1->kind - c2->kind;
 279        return strcmp(c1->name, c2->name);
 280}
 281
 282static void fill_tracking_info(char *stat, const char *branch_name)
 283{
 284        int ours, theirs;
 285        struct branch *branch = branch_get(branch_name);
 286
 287        if (!stat_tracking_info(branch, &ours, &theirs) || (!ours && !theirs))
 288                return;
 289        if (!ours)
 290                sprintf(stat, "[behind %d] ", theirs);
 291        else if (!theirs)
 292                sprintf(stat, "[ahead %d] ", ours);
 293        else
 294                sprintf(stat, "[ahead %d, behind %d] ", ours, theirs);
 295}
 296
 297static int matches_merge_filter(struct commit *commit)
 298{
 299        int is_merged;
 300
 301        if (merge_filter == NO_FILTER)
 302                return 1;
 303
 304        is_merged = !!(commit->object.flags & UNINTERESTING);
 305        return (is_merged == (merge_filter == SHOW_MERGED));
 306}
 307
 308static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
 309                           int abbrev, int current)
 310{
 311        char c;
 312        int color;
 313        struct commit *commit = item->commit;
 314
 315        if (!matches_merge_filter(commit))
 316                return;
 317
 318        switch (item->kind) {
 319        case REF_LOCAL_BRANCH:
 320                color = COLOR_BRANCH_LOCAL;
 321                break;
 322        case REF_REMOTE_BRANCH:
 323                color = COLOR_BRANCH_REMOTE;
 324                break;
 325        default:
 326                color = COLOR_BRANCH_PLAIN;
 327                break;
 328        }
 329
 330        c = ' ';
 331        if (current) {
 332                c = '*';
 333                color = COLOR_BRANCH_CURRENT;
 334        }
 335
 336        if (verbose) {
 337                struct strbuf subject;
 338                const char *sub = " **** invalid ref ****";
 339                char stat[128];
 340
 341                strbuf_init(&subject, 0);
 342                stat[0] = '\0';
 343
 344                commit = item->commit;
 345                if (commit && !parse_commit(commit)) {
 346                        pretty_print_commit(CMIT_FMT_ONELINE, commit,
 347                                            &subject, 0, NULL, NULL, 0, 0);
 348                        sub = subject.buf;
 349                }
 350
 351                if (item->kind == REF_LOCAL_BRANCH)
 352                        fill_tracking_info(stat, item->name);
 353
 354                printf("%c %s%-*s%s %s %s%s\n", c, branch_get_color(color),
 355                       maxwidth, item->name,
 356                       branch_get_color(COLOR_BRANCH_RESET),
 357                       find_unique_abbrev(item->commit->object.sha1, abbrev),
 358                       stat, sub);
 359                strbuf_release(&subject);
 360        } else {
 361                printf("%c %s%s%s\n", c, branch_get_color(color), item->name,
 362                       branch_get_color(COLOR_BRANCH_RESET));
 363        }
 364}
 365
 366static int calc_maxwidth(struct ref_list *refs)
 367{
 368        int i, l, w = 0;
 369        for (i = 0; i < refs->index; i++) {
 370                if (!matches_merge_filter(refs->list[i].commit))
 371                        continue;
 372                l = strlen(refs->list[i].name);
 373                if (l > w)
 374                        w = l;
 375        }
 376        return w;
 377}
 378
 379static void print_ref_list(int kinds, int detached, int verbose, int abbrev, struct commit_list *with_commit)
 380{
 381        int i;
 382        struct ref_list ref_list;
 383        struct commit *head_commit = lookup_commit_reference_gently(head_sha1, 1);
 384
 385        memset(&ref_list, 0, sizeof(ref_list));
 386        ref_list.kinds = kinds;
 387        ref_list.with_commit = with_commit;
 388        if (merge_filter != NO_FILTER)
 389                init_revisions(&ref_list.revs, NULL);
 390        for_each_ref(append_ref, &ref_list);
 391        if (merge_filter != NO_FILTER) {
 392                struct commit *filter;
 393                filter = lookup_commit_reference_gently(merge_filter_ref, 0);
 394                filter->object.flags |= UNINTERESTING;
 395                add_pending_object(&ref_list.revs,
 396                                   (struct object *) filter, "");
 397                ref_list.revs.limited = 1;
 398                prepare_revision_walk(&ref_list.revs);
 399                if (verbose)
 400                        ref_list.maxwidth = calc_maxwidth(&ref_list);
 401        }
 402
 403        qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp);
 404
 405        detached = (detached && (kinds & REF_LOCAL_BRANCH));
 406        if (detached && head_commit && has_commit(head_commit, with_commit)) {
 407                struct ref_item item;
 408                item.name = xstrdup("(no branch)");
 409                item.kind = REF_LOCAL_BRANCH;
 410                item.commit = head_commit;
 411                if (strlen(item.name) > ref_list.maxwidth)
 412                        ref_list.maxwidth = strlen(item.name);
 413                print_ref_item(&item, ref_list.maxwidth, verbose, abbrev, 1);
 414                free(item.name);
 415        }
 416
 417        for (i = 0; i < ref_list.index; i++) {
 418                int current = !detached &&
 419                        (ref_list.list[i].kind == REF_LOCAL_BRANCH) &&
 420                        !strcmp(ref_list.list[i].name, head);
 421                print_ref_item(&ref_list.list[i], ref_list.maxwidth, verbose,
 422                               abbrev, current);
 423        }
 424
 425        free_ref_list(&ref_list);
 426}
 427
 428static void rename_branch(const char *oldname, const char *newname, int force)
 429{
 430        char oldref[PATH_MAX], newref[PATH_MAX], logmsg[PATH_MAX*2 + 100];
 431        unsigned char sha1[20];
 432        char oldsection[PATH_MAX], newsection[PATH_MAX];
 433
 434        if (!oldname)
 435                die("cannot rename the current branch while not on any.");
 436
 437        if (snprintf(oldref, sizeof(oldref), "refs/heads/%s", oldname) > sizeof(oldref))
 438                die("Old branchname too long");
 439
 440        if (check_ref_format(oldref))
 441                die("Invalid branch name: %s", oldref);
 442
 443        if (snprintf(newref, sizeof(newref), "refs/heads/%s", newname) > sizeof(newref))
 444                die("New branchname too long");
 445
 446        if (check_ref_format(newref))
 447                die("Invalid branch name: %s", newref);
 448
 449        if (resolve_ref(newref, sha1, 1, NULL) && !force)
 450                die("A branch named '%s' already exists.", newname);
 451
 452        snprintf(logmsg, sizeof(logmsg), "Branch: renamed %s to %s",
 453                 oldref, newref);
 454
 455        if (rename_ref(oldref, newref, logmsg))
 456                die("Branch rename failed");
 457
 458        /* no need to pass logmsg here as HEAD didn't really move */
 459        if (!strcmp(oldname, head) && create_symref("HEAD", newref, NULL))
 460                die("Branch renamed to %s, but HEAD is not updated!", newname);
 461
 462        snprintf(oldsection, sizeof(oldsection), "branch.%s", oldref + 11);
 463        snprintf(newsection, sizeof(newsection), "branch.%s", newref + 11);
 464        if (git_config_rename_section(oldsection, newsection) < 0)
 465                die("Branch is renamed, but update of config-file failed");
 466}
 467
 468static int opt_parse_with_commit(const struct option *opt, const char *arg, int unset)
 469{
 470        unsigned char sha1[20];
 471        struct commit *commit;
 472
 473        if (!arg)
 474                return -1;
 475        if (get_sha1(arg, sha1))
 476                die("malformed object name %s", arg);
 477        commit = lookup_commit_reference(sha1);
 478        if (!commit)
 479                die("no such commit %s", arg);
 480        commit_list_insert(commit, opt->value);
 481        return 0;
 482}
 483
 484static int opt_parse_merge_filter(const struct option *opt, const char *arg, int unset)
 485{
 486        merge_filter = ((opt->long_name[0] == 'n')
 487                        ? SHOW_NOT_MERGED
 488                        : SHOW_MERGED);
 489        if (unset)
 490                merge_filter = SHOW_NOT_MERGED; /* b/c for --no-merged */
 491        if (!arg)
 492                arg = "HEAD";
 493        if (get_sha1(arg, merge_filter_ref))
 494                die("malformed object name %s", arg);
 495        return 0;
 496}
 497
 498int cmd_branch(int argc, const char **argv, const char *prefix)
 499{
 500        int delete = 0, rename = 0, force_create = 0;
 501        int verbose = 0, abbrev = DEFAULT_ABBREV, detached = 0;
 502        int reflog = 0;
 503        enum branch_track track;
 504        int kinds = REF_LOCAL_BRANCH;
 505        struct commit_list *with_commit = NULL;
 506
 507        struct option options[] = {
 508                OPT_GROUP("Generic options"),
 509                OPT__VERBOSE(&verbose),
 510                OPT_SET_INT( 0 , "track",  &track, "set up tracking mode (see git-pull(1))",
 511                        BRANCH_TRACK_EXPLICIT),
 512                OPT_BOOLEAN( 0 , "color",  &branch_use_color, "use colored output"),
 513                OPT_SET_INT('r', NULL,     &kinds, "act on remote-tracking branches",
 514                        REF_REMOTE_BRANCH),
 515                {
 516                        OPTION_CALLBACK, 0, "contains", &with_commit, "commit",
 517                        "print only branches that contain the commit",
 518                        PARSE_OPT_LASTARG_DEFAULT,
 519                        opt_parse_with_commit, (intptr_t)"HEAD",
 520                },
 521                {
 522                        OPTION_CALLBACK, 0, "with", &with_commit, "commit",
 523                        "print only branches that contain the commit",
 524                        PARSE_OPT_HIDDEN | PARSE_OPT_LASTARG_DEFAULT,
 525                        opt_parse_with_commit, (intptr_t) "HEAD",
 526                },
 527                OPT__ABBREV(&abbrev),
 528
 529                OPT_GROUP("Specific git-branch actions:"),
 530                OPT_SET_INT('a', NULL, &kinds, "list both remote-tracking and local branches",
 531                        REF_REMOTE_BRANCH | REF_LOCAL_BRANCH),
 532                OPT_BIT('d', NULL, &delete, "delete fully merged branch", 1),
 533                OPT_BIT('D', NULL, &delete, "delete branch (even if not merged)", 2),
 534                OPT_BIT('m', NULL, &rename, "move/rename a branch and its reflog", 1),
 535                OPT_BIT('M', NULL, &rename, "move/rename a branch, even if target exists", 2),
 536                OPT_BOOLEAN('l', NULL, &reflog, "create the branch's reflog"),
 537                OPT_BOOLEAN('f', NULL, &force_create, "force creation (when already exists)"),
 538                {
 539                        OPTION_CALLBACK, 0, "no-merged", &merge_filter_ref,
 540                        "commit", "print only not merged branches",
 541                        PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
 542                        opt_parse_merge_filter, (intptr_t) "HEAD",
 543                },
 544                {
 545                        OPTION_CALLBACK, 0, "merged", &merge_filter_ref,
 546                        "commit", "print only merged branches",
 547                        PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
 548                        opt_parse_merge_filter, (intptr_t) "HEAD",
 549                },
 550                OPT_END(),
 551        };
 552
 553        git_config(git_branch_config, NULL);
 554
 555        if (branch_use_color == -1)
 556                branch_use_color = git_use_color_default;
 557
 558        track = git_branch_track;
 559
 560        head = resolve_ref("HEAD", head_sha1, 0, NULL);
 561        if (!head)
 562                die("Failed to resolve HEAD as a valid ref.");
 563        head = xstrdup(head);
 564        if (!strcmp(head, "HEAD")) {
 565                detached = 1;
 566        } else {
 567                if (prefixcmp(head, "refs/heads/"))
 568                        die("HEAD not found below refs/heads!");
 569                head += 11;
 570        }
 571        hashcpy(merge_filter_ref, head_sha1);
 572
 573        argc = parse_options(argc, argv, options, builtin_branch_usage, 0);
 574        if (!!delete + !!rename + !!force_create > 1)
 575                usage_with_options(builtin_branch_usage, options);
 576
 577        if (delete)
 578                return delete_branches(argc, argv, delete > 1, kinds);
 579        else if (argc == 0)
 580                print_ref_list(kinds, detached, verbose, abbrev, with_commit);
 581        else if (rename && (argc == 1))
 582                rename_branch(head, argv[0], rename > 1);
 583        else if (rename && (argc == 2))
 584                rename_branch(argv[0], argv[1], rename > 1);
 585        else if (argc <= 2)
 586                create_branch(head, argv[0], (argc == 2) ? argv[1] : head,
 587                              force_create, reflog, track);
 588        else
 589                usage_with_options(builtin_branch_usage, options);
 590
 591        return 0;
 592}