Andrew's git / gitweb.git / builtin-branch.c
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builtin-branch.con commit Merge branch 'maint' (fa4946b)
   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
  17static const char * const builtin_branch_usage[] = {
  18        "git branch [options] [-r | -a] [--merged | --no-merged]",
  19        "git branch [options] [-l] [-f] <branchname> [<start-point>]",
  20        "git branch [options] [-r] (-d | -D) <branchname>",
  21        "git branch [options] (-m | -M) [<oldbranch>] <newbranch>",
  22        NULL
  23};
  24
  25#define REF_UNKNOWN_TYPE    0x00
  26#define REF_LOCAL_BRANCH    0x01
  27#define REF_REMOTE_BRANCH   0x02
  28#define REF_TAG             0x04
  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        unsigned char sha1[20];
 185};
 186
 187struct ref_list {
 188        int index, alloc, maxwidth;
 189        struct ref_item *list;
 190        struct commit_list *with_commit;
 191        int kinds;
 192};
 193
 194static int has_commit(const unsigned char *sha1, struct commit_list *with_commit)
 195{
 196        struct commit *commit;
 197
 198        if (!with_commit)
 199                return 1;
 200        commit = lookup_commit_reference_gently(sha1, 1);
 201        if (!commit)
 202                return 0;
 203        while (with_commit) {
 204                struct commit *other;
 205
 206                other = with_commit->item;
 207                with_commit = with_commit->next;
 208                if (in_merge_bases(other, &commit, 1))
 209                        return 1;
 210        }
 211        return 0;
 212}
 213
 214static int append_ref(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
 215{
 216        struct ref_list *ref_list = (struct ref_list*)(cb_data);
 217        struct ref_item *newitem;
 218        int kind = REF_UNKNOWN_TYPE;
 219        int len;
 220        static struct commit_list branch;
 221
 222        /* Detect kind */
 223        if (!prefixcmp(refname, "refs/heads/")) {
 224                kind = REF_LOCAL_BRANCH;
 225                refname += 11;
 226        } else if (!prefixcmp(refname, "refs/remotes/")) {
 227                kind = REF_REMOTE_BRANCH;
 228                refname += 13;
 229        } else if (!prefixcmp(refname, "refs/tags/")) {
 230                kind = REF_TAG;
 231                refname += 10;
 232        }
 233
 234        /* Filter with with_commit if specified */
 235        if (!has_commit(sha1, ref_list->with_commit))
 236                return 0;
 237
 238        /* Don't add types the caller doesn't want */
 239        if ((kind & ref_list->kinds) == 0)
 240                return 0;
 241
 242        if (merge_filter != NO_FILTER) {
 243                branch.item = lookup_commit_reference_gently(sha1, 1);
 244                if (!branch.item)
 245                        die("Unable to lookup tip of branch %s", refname);
 246                if (merge_filter == SHOW_NOT_MERGED &&
 247                    has_commit(merge_filter_ref, &branch))
 248                        return 0;
 249                if (merge_filter == SHOW_MERGED &&
 250                    !has_commit(merge_filter_ref, &branch))
 251                        return 0;
 252        }
 253
 254        /* Resize buffer */
 255        if (ref_list->index >= ref_list->alloc) {
 256                ref_list->alloc = alloc_nr(ref_list->alloc);
 257                ref_list->list = xrealloc(ref_list->list,
 258                                ref_list->alloc * sizeof(struct ref_item));
 259        }
 260
 261        /* Record the new item */
 262        newitem = &(ref_list->list[ref_list->index++]);
 263        newitem->name = xstrdup(refname);
 264        newitem->kind = kind;
 265        hashcpy(newitem->sha1, sha1);
 266        len = strlen(newitem->name);
 267        if (len > ref_list->maxwidth)
 268                ref_list->maxwidth = len;
 269
 270        return 0;
 271}
 272
 273static void free_ref_list(struct ref_list *ref_list)
 274{
 275        int i;
 276
 277        for (i = 0; i < ref_list->index; i++)
 278                free(ref_list->list[i].name);
 279        free(ref_list->list);
 280}
 281
 282static int ref_cmp(const void *r1, const void *r2)
 283{
 284        struct ref_item *c1 = (struct ref_item *)(r1);
 285        struct ref_item *c2 = (struct ref_item *)(r2);
 286
 287        if (c1->kind != c2->kind)
 288                return c1->kind - c2->kind;
 289        return strcmp(c1->name, c2->name);
 290}
 291
 292static void fill_tracking_info(char *stat, const char *branch_name)
 293{
 294        int ours, theirs;
 295        struct branch *branch = branch_get(branch_name);
 296
 297        if (!stat_tracking_info(branch, &ours, &theirs) || (!ours && !theirs))
 298                return;
 299        if (!ours)
 300                sprintf(stat, "[behind %d] ", theirs);
 301        else if (!theirs)
 302                sprintf(stat, "[ahead %d] ", ours);
 303        else
 304                sprintf(stat, "[ahead %d, behind %d] ", ours, theirs);
 305}
 306
 307static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
 308                           int abbrev, int current)
 309{
 310        char c;
 311        int color;
 312        struct commit *commit;
 313
 314        switch (item->kind) {
 315        case REF_LOCAL_BRANCH:
 316                color = COLOR_BRANCH_LOCAL;
 317                break;
 318        case REF_REMOTE_BRANCH:
 319                color = COLOR_BRANCH_REMOTE;
 320                break;
 321        default:
 322                color = COLOR_BRANCH_PLAIN;
 323                break;
 324        }
 325
 326        c = ' ';
 327        if (current) {
 328                c = '*';
 329                color = COLOR_BRANCH_CURRENT;
 330        }
 331
 332        if (verbose) {
 333                struct strbuf subject;
 334                const char *sub = " **** invalid ref ****";
 335                char stat[128];
 336
 337                strbuf_init(&subject, 0);
 338                stat[0] = '\0';
 339
 340                commit = lookup_commit(item->sha1);
 341                if (commit && !parse_commit(commit)) {
 342                        pretty_print_commit(CMIT_FMT_ONELINE, commit,
 343                                            &subject, 0, NULL, NULL, 0, 0);
 344                        sub = subject.buf;
 345                }
 346
 347                if (item->kind == REF_LOCAL_BRANCH)
 348                        fill_tracking_info(stat, item->name);
 349
 350                printf("%c %s%-*s%s %s %s%s\n", c, branch_get_color(color),
 351                       maxwidth, item->name,
 352                       branch_get_color(COLOR_BRANCH_RESET),
 353                       find_unique_abbrev(item->sha1, abbrev),
 354                       stat, sub);
 355                strbuf_release(&subject);
 356        } else {
 357                printf("%c %s%s%s\n", c, branch_get_color(color), item->name,
 358                       branch_get_color(COLOR_BRANCH_RESET));
 359        }
 360}
 361
 362static void print_ref_list(int kinds, int detached, int verbose, int abbrev, struct commit_list *with_commit)
 363{
 364        int i;
 365        struct ref_list ref_list;
 366
 367        memset(&ref_list, 0, sizeof(ref_list));
 368        ref_list.kinds = kinds;
 369        ref_list.with_commit = with_commit;
 370        for_each_ref(append_ref, &ref_list);
 371
 372        qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp);
 373
 374        detached = (detached && (kinds & REF_LOCAL_BRANCH));
 375        if (detached && has_commit(head_sha1, with_commit)) {
 376                struct ref_item item;
 377                item.name = xstrdup("(no branch)");
 378                item.kind = REF_LOCAL_BRANCH;
 379                hashcpy(item.sha1, head_sha1);
 380                if (strlen(item.name) > ref_list.maxwidth)
 381                              ref_list.maxwidth = strlen(item.name);
 382                print_ref_item(&item, ref_list.maxwidth, verbose, abbrev, 1);
 383                free(item.name);
 384        }
 385
 386        for (i = 0; i < ref_list.index; i++) {
 387                int current = !detached &&
 388                        (ref_list.list[i].kind == REF_LOCAL_BRANCH) &&
 389                        !strcmp(ref_list.list[i].name, head);
 390                print_ref_item(&ref_list.list[i], ref_list.maxwidth, verbose,
 391                               abbrev, current);
 392        }
 393
 394        free_ref_list(&ref_list);
 395}
 396
 397static void rename_branch(const char *oldname, const char *newname, int force)
 398{
 399        char oldref[PATH_MAX], newref[PATH_MAX], logmsg[PATH_MAX*2 + 100];
 400        unsigned char sha1[20];
 401        char oldsection[PATH_MAX], newsection[PATH_MAX];
 402
 403        if (!oldname)
 404                die("cannot rename the current branch while not on any.");
 405
 406        if (snprintf(oldref, sizeof(oldref), "refs/heads/%s", oldname) > sizeof(oldref))
 407                die("Old branchname too long");
 408
 409        if (check_ref_format(oldref))
 410                die("Invalid branch name: %s", oldref);
 411
 412        if (snprintf(newref, sizeof(newref), "refs/heads/%s", newname) > sizeof(newref))
 413                die("New branchname too long");
 414
 415        if (check_ref_format(newref))
 416                die("Invalid branch name: %s", newref);
 417
 418        if (resolve_ref(newref, sha1, 1, NULL) && !force)
 419                die("A branch named '%s' already exists.", newname);
 420
 421        snprintf(logmsg, sizeof(logmsg), "Branch: renamed %s to %s",
 422                 oldref, newref);
 423
 424        if (rename_ref(oldref, newref, logmsg))
 425                die("Branch rename failed");
 426
 427        /* no need to pass logmsg here as HEAD didn't really move */
 428        if (!strcmp(oldname, head) && create_symref("HEAD", newref, NULL))
 429                die("Branch renamed to %s, but HEAD is not updated!", newname);
 430
 431        snprintf(oldsection, sizeof(oldsection), "branch.%s", oldref + 11);
 432        snprintf(newsection, sizeof(newsection), "branch.%s", newref + 11);
 433        if (git_config_rename_section(oldsection, newsection) < 0)
 434                die("Branch is renamed, but update of config-file failed");
 435}
 436
 437static int opt_parse_with_commit(const struct option *opt, const char *arg, int unset)
 438{
 439        unsigned char sha1[20];
 440        struct commit *commit;
 441
 442        if (!arg)
 443                return -1;
 444        if (get_sha1(arg, sha1))
 445                die("malformed object name %s", arg);
 446        commit = lookup_commit_reference(sha1);
 447        if (!commit)
 448                die("no such commit %s", arg);
 449        commit_list_insert(commit, opt->value);
 450        return 0;
 451}
 452
 453static int opt_parse_merge_filter(const struct option *opt, const char *arg, int unset)
 454{
 455        merge_filter = ((opt->long_name[0] == 'n')
 456                        ? SHOW_NOT_MERGED
 457                        : SHOW_MERGED);
 458        if (unset)
 459                merge_filter = SHOW_NOT_MERGED; /* b/c for --no-merged */
 460        if (!arg)
 461                arg = "HEAD";
 462        if (get_sha1(arg, merge_filter_ref))
 463                die("malformed object name %s", arg);
 464        return 0;
 465}
 466
 467int cmd_branch(int argc, const char **argv, const char *prefix)
 468{
 469        int delete = 0, rename = 0, force_create = 0;
 470        int verbose = 0, abbrev = DEFAULT_ABBREV, detached = 0;
 471        int reflog = 0;
 472        enum branch_track track;
 473        int kinds = REF_LOCAL_BRANCH;
 474        struct commit_list *with_commit = NULL;
 475
 476        struct option options[] = {
 477                OPT_GROUP("Generic options"),
 478                OPT__VERBOSE(&verbose),
 479                OPT_SET_INT( 0 , "track",  &track, "set up tracking mode (see git-pull(1))",
 480                        BRANCH_TRACK_EXPLICIT),
 481                OPT_BOOLEAN( 0 , "color",  &branch_use_color, "use colored output"),
 482                OPT_SET_INT('r', NULL,     &kinds, "act on remote-tracking branches",
 483                        REF_REMOTE_BRANCH),
 484                {
 485                        OPTION_CALLBACK, 0, "contains", &with_commit, "commit",
 486                        "print only branches that contain the commit",
 487                        PARSE_OPT_LASTARG_DEFAULT,
 488                        opt_parse_with_commit, (intptr_t)"HEAD",
 489                },
 490                {
 491                        OPTION_CALLBACK, 0, "with", &with_commit, "commit",
 492                        "print only branches that contain the commit",
 493                        PARSE_OPT_HIDDEN | PARSE_OPT_LASTARG_DEFAULT,
 494                        opt_parse_with_commit, (intptr_t) "HEAD",
 495                },
 496                OPT__ABBREV(&abbrev),
 497
 498                OPT_GROUP("Specific git-branch actions:"),
 499                OPT_SET_INT('a', NULL, &kinds, "list both remote-tracking and local branches",
 500                        REF_REMOTE_BRANCH | REF_LOCAL_BRANCH),
 501                OPT_BIT('d', NULL, &delete, "delete fully merged branch", 1),
 502                OPT_BIT('D', NULL, &delete, "delete branch (even if not merged)", 2),
 503                OPT_BIT('m', NULL, &rename, "move/rename a branch and its reflog", 1),
 504                OPT_BIT('M', NULL, &rename, "move/rename a branch, even if target exists", 2),
 505                OPT_BOOLEAN('l', NULL, &reflog, "create the branch's reflog"),
 506                OPT_BOOLEAN('f', NULL, &force_create, "force creation (when already exists)"),
 507                {
 508                        OPTION_CALLBACK, 0, "no-merged", &merge_filter_ref,
 509                        "commit", "print only not merged branches",
 510                        PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
 511                        opt_parse_merge_filter, (intptr_t) "HEAD",
 512                },
 513                {
 514                        OPTION_CALLBACK, 0, "merged", &merge_filter_ref,
 515                        "commit", "print only merged branches",
 516                        PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NONEG,
 517                        opt_parse_merge_filter, (intptr_t) "HEAD",
 518                },
 519                OPT_END(),
 520        };
 521
 522        git_config(git_branch_config, NULL);
 523
 524        if (branch_use_color == -1)
 525                branch_use_color = git_use_color_default;
 526
 527        track = git_branch_track;
 528
 529        head = resolve_ref("HEAD", head_sha1, 0, NULL);
 530        if (!head)
 531                die("Failed to resolve HEAD as a valid ref.");
 532        head = xstrdup(head);
 533        if (!strcmp(head, "HEAD")) {
 534                detached = 1;
 535        } else {
 536                if (prefixcmp(head, "refs/heads/"))
 537                        die("HEAD not found below refs/heads!");
 538                head += 11;
 539        }
 540        hashcpy(merge_filter_ref, head_sha1);
 541
 542        argc = parse_options(argc, argv, options, builtin_branch_usage, 0);
 543        if (!!delete + !!rename + !!force_create > 1)
 544                usage_with_options(builtin_branch_usage, options);
 545
 546        if (delete)
 547                return delete_branches(argc, argv, delete > 1, kinds);
 548        else if (argc == 0)
 549                print_ref_list(kinds, detached, verbose, abbrev, with_commit);
 550        else if (rename && (argc == 1))
 551                rename_branch(head, argv[0], rename > 1);
 552        else if (rename && (argc == 2))
 553                rename_branch(argv[0], argv[1], rename > 1);
 554        else if (argc <= 2)
 555                create_branch(head, argv[0], (argc == 2) ? argv[1] : head,
 556                              force_create, reflog, track);
 557        else
 558                usage_with_options(builtin_branch_usage, options);
 559
 560        return 0;
 561}