Andrew's git - gitweb.git/blob

   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
  14static const char builtin_branch_usage[] =
  15  "git-branch [-r] (-d | -D) <branchname> | [-l] [-f] <branchname> [<start-point>] | (-m | -M) [<oldbranch>] <newbranch> | [-r | -a] [-v [--abbrev=<length>]]";
  16
  17#define REF_UNKNOWN_TYPE    0x00
  18#define REF_LOCAL_BRANCH    0x01
  19#define REF_REMOTE_BRANCH   0x02
  20#define REF_TAG             0x04
  21
  22static const char *head;
  23static unsigned char head_sha1[20];
  24
  25static int branch_use_color;
  26static char branch_colors[][COLOR_MAXLEN] = {
  27        "\033[m",       /* reset */
  28        "",             /* PLAIN (normal) */
  29        "\033[31m",     /* REMOTE (red) */
  30        "",             /* LOCAL (normal) */
  31        "\033[32m",     /* CURRENT (green) */
  32};
  33enum color_branch {
  34        COLOR_BRANCH_RESET = 0,
  35        COLOR_BRANCH_PLAIN = 1,
  36        COLOR_BRANCH_REMOTE = 2,
  37        COLOR_BRANCH_LOCAL = 3,
  38        COLOR_BRANCH_CURRENT = 4,
  39};
  40
  41static int parse_branch_color_slot(const char *var, int ofs)
  42{
  43        if (!strcasecmp(var+ofs, "plain"))
  44                return COLOR_BRANCH_PLAIN;
  45        if (!strcasecmp(var+ofs, "reset"))
  46                return COLOR_BRANCH_RESET;
  47        if (!strcasecmp(var+ofs, "remote"))
  48                return COLOR_BRANCH_REMOTE;
  49        if (!strcasecmp(var+ofs, "local"))
  50                return COLOR_BRANCH_LOCAL;
  51        if (!strcasecmp(var+ofs, "current"))
  52                return COLOR_BRANCH_CURRENT;
  53        die("bad config variable '%s'", var);
  54}
  55
  56int git_branch_config(const char *var, const char *value)
  57{
  58        if (!strcmp(var, "color.branch")) {
  59                branch_use_color = git_config_colorbool(var, value);
  60                return 0;
  61        }
  62        if (!strncmp(var, "color.branch.", 13)) {
  63                int slot = parse_branch_color_slot(var, 13);
  64                color_parse(value, var, branch_colors[slot]);
  65                return 0;
  66        }
  67        return git_default_config(var, value);
  68}
  69
  70const char *branch_get_color(enum color_branch ix)
  71{
  72        if (branch_use_color)
  73                return branch_colors[ix];
  74        return "";
  75}
  76
  77static int delete_branches(int argc, const char **argv, int force, int kinds)
  78{
  79        struct commit *rev, *head_rev = head_rev;
  80        unsigned char sha1[20];
  81        char *name = NULL;
  82        const char *fmt, *remote;
  83        int i;
  84        int ret = 0;
  85
  86        switch (kinds) {
  87        case REF_REMOTE_BRANCH:
  88                fmt = "refs/remotes/%s";
  89                remote = "remote ";
  90                force = 1;
  91                break;
  92        case REF_LOCAL_BRANCH:
  93                fmt = "refs/heads/%s";
  94                remote = "";
  95                break;
  96        default:
  97                die("cannot use -a with -d");
  98        }
  99
 100        if (!force) {
 101                head_rev = lookup_commit_reference(head_sha1);
 102                if (!head_rev)
 103                        die("Couldn't look up commit object for HEAD");
 104        }
 105        for (i = 0; i < argc; i++) {
 106                if (kinds == REF_LOCAL_BRANCH && !strcmp(head, argv[i])) {
 107                        error("Cannot delete the branch '%s' "
 108                                "which you are currently on.", argv[i]);
 109                        ret = 1;
 110                        continue;
 111                }
 112
 113                if (name)
 114                        free(name);
 115
 116                name = xstrdup(mkpath(fmt, argv[i]));
 117                if (!resolve_ref(name, sha1, 1, NULL)) {
 118                        error("%sbranch '%s' not found.",
 119                                        remote, argv[i]);
 120                        ret = 1;
 121                        continue;
 122                }
 123
 124                rev = lookup_commit_reference(sha1);
 125                if (!rev) {
 126                        error("Couldn't look up commit object for '%s'", name);
 127                        ret = 1;
 128                        continue;
 129                }
 130
 131                /* This checks whether the merge bases of branch and
 132                 * HEAD contains branch -- which means that the HEAD
 133                 * contains everything in both.
 134                 */
 135
 136                if (!force &&
 137                    !in_merge_bases(rev, head_rev)) {
 138                        error("The branch '%s' is not a strict subset of "
 139                                "your current HEAD.\n"
 140                                "If you are sure you want to delete it, "
 141                                "run 'git branch -D %s'.", argv[i], argv[i]);
 142                        ret = 1;
 143                        continue;
 144                }
 145
 146                if (delete_ref(name, sha1)) {
 147                        error("Error deleting %sbranch '%s'", remote,
 148                               argv[i]);
 149                        ret = 1;
 150                } else
 151                        printf("Deleted %sbranch %s.\n", remote, argv[i]);
 152
 153        }
 154
 155        if (name)
 156                free(name);
 157
 158        return(ret);
 159}
 160
 161struct ref_item {
 162        char *name;
 163        unsigned int kind;
 164        unsigned char sha1[20];
 165};
 166
 167struct ref_list {
 168        int index, alloc, maxwidth;
 169        struct ref_item *list;
 170        int kinds;
 171};
 172
 173static int append_ref(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
 174{
 175        struct ref_list *ref_list = (struct ref_list*)(cb_data);
 176        struct ref_item *newitem;
 177        int kind = REF_UNKNOWN_TYPE;
 178        int len;
 179
 180        /* Detect kind */
 181        if (!strncmp(refname, "refs/heads/", 11)) {
 182                kind = REF_LOCAL_BRANCH;
 183                refname += 11;
 184        } else if (!strncmp(refname, "refs/remotes/", 13)) {
 185                kind = REF_REMOTE_BRANCH;
 186                refname += 13;
 187        } else if (!strncmp(refname, "refs/tags/", 10)) {
 188                kind = REF_TAG;
 189                refname += 10;
 190        }
 191
 192        /* Don't add types the caller doesn't want */
 193        if ((kind & ref_list->kinds) == 0)
 194                return 0;
 195
 196        /* Resize buffer */
 197        if (ref_list->index >= ref_list->alloc) {
 198                ref_list->alloc = alloc_nr(ref_list->alloc);
 199                ref_list->list = xrealloc(ref_list->list,
 200                                ref_list->alloc * sizeof(struct ref_item));
 201        }
 202
 203        /* Record the new item */
 204        newitem = &(ref_list->list[ref_list->index++]);
 205        newitem->name = xstrdup(refname);
 206        newitem->kind = kind;
 207        hashcpy(newitem->sha1, sha1);
 208        len = strlen(newitem->name);
 209        if (len > ref_list->maxwidth)
 210                ref_list->maxwidth = len;
 211
 212        return 0;
 213}
 214
 215static void free_ref_list(struct ref_list *ref_list)
 216{
 217        int i;
 218
 219        for (i = 0; i < ref_list->index; i++)
 220                free(ref_list->list[i].name);
 221        free(ref_list->list);
 222}
 223
 224static int ref_cmp(const void *r1, const void *r2)
 225{
 226        struct ref_item *c1 = (struct ref_item *)(r1);
 227        struct ref_item *c2 = (struct ref_item *)(r2);
 228
 229        if (c1->kind != c2->kind)
 230                return c1->kind - c2->kind;
 231        return strcmp(c1->name, c2->name);
 232}
 233
 234static void print_ref_info(const unsigned char *sha1, int abbrev)
 235{
 236        struct commit *commit;
 237        char subject[256];
 238
 239
 240        commit = lookup_commit(sha1);
 241        if (commit && !parse_commit(commit))
 242                pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0,
 243                                    subject, sizeof(subject), 0,
 244                                    NULL, NULL, 0);
 245        else
 246                strcpy(subject, " **** invalid ref ****");
 247
 248        printf(" %s %s\n", find_unique_abbrev(sha1, abbrev), subject);
 249}
 250
 251static void print_ref_list(int kinds, int verbose, int abbrev)
 252{
 253        int i;
 254        char c;
 255        struct ref_list ref_list;
 256        int color;
 257
 258        memset(&ref_list, 0, sizeof(ref_list));
 259        ref_list.kinds = kinds;
 260        for_each_ref(append_ref, &ref_list);
 261
 262        qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp);
 263
 264        for (i = 0; i < ref_list.index; i++) {
 265                switch( ref_list.list[i].kind ) {
 266                        case REF_LOCAL_BRANCH:
 267                                color = COLOR_BRANCH_LOCAL;
 268                                break;
 269                        case REF_REMOTE_BRANCH:
 270                                color = COLOR_BRANCH_REMOTE;
 271                                break;
 272                        default:
 273                                color = COLOR_BRANCH_PLAIN;
 274                                break;
 275                }
 276
 277                c = ' ';
 278                if (ref_list.list[i].kind == REF_LOCAL_BRANCH &&
 279                                !strcmp(ref_list.list[i].name, head)) {
 280                        c = '*';
 281                        color = COLOR_BRANCH_CURRENT;
 282                }
 283
 284                if (verbose) {
 285                        printf("%c %s%-*s%s", c,
 286                                        branch_get_color(color),
 287                                        ref_list.maxwidth,
 288                                        ref_list.list[i].name,
 289                                        branch_get_color(COLOR_BRANCH_RESET));
 290                        print_ref_info(ref_list.list[i].sha1, abbrev);
 291                }
 292                else
 293                        printf("%c %s%s%s\n", c,
 294                                        branch_get_color(color),
 295                                        ref_list.list[i].name,
 296                                        branch_get_color(COLOR_BRANCH_RESET));
 297        }
 298
 299        free_ref_list(&ref_list);
 300}
 301
 302static void create_branch(const char *name, const char *start,
 303                          int force, int reflog)
 304{
 305        struct ref_lock *lock;
 306        struct commit *commit;
 307        unsigned char sha1[20];
 308        char ref[PATH_MAX], msg[PATH_MAX + 20];
 309
 310        snprintf(ref, sizeof ref, "refs/heads/%s", name);
 311        if (check_ref_format(ref))
 312                die("'%s' is not a valid branch name.", name);
 313
 314        if (resolve_ref(ref, sha1, 1, NULL)) {
 315                if (!force)
 316                        die("A branch named '%s' already exists.", name);
 317                else if (!strcmp(head, name))
 318                        die("Cannot force update the current branch.");
 319        }
 320
 321        if (get_sha1(start, sha1) ||
 322            (commit = lookup_commit_reference(sha1)) == NULL)
 323                die("Not a valid branch point: '%s'.", start);
 324        hashcpy(sha1, commit->object.sha1);
 325
 326        lock = lock_any_ref_for_update(ref, NULL);
 327        if (!lock)
 328                die("Failed to lock ref for update: %s.", strerror(errno));
 329
 330        if (reflog) {
 331                log_all_ref_updates = 1;
 332                snprintf(msg, sizeof msg, "branch: Created from %s", start);
 333        }
 334
 335        if (write_ref_sha1(lock, sha1, msg) < 0)
 336                die("Failed to write ref: %s.", strerror(errno));
 337}
 338
 339static void rename_branch(const char *oldname, const char *newname, int force)
 340{
 341        char oldref[PATH_MAX], newref[PATH_MAX], logmsg[PATH_MAX*2 + 100];
 342        unsigned char sha1[20];
 343
 344        if (snprintf(oldref, sizeof(oldref), "refs/heads/%s", oldname) > sizeof(oldref))
 345                die("Old branchname too long");
 346
 347        if (check_ref_format(oldref))
 348                die("Invalid branch name: %s", oldref);
 349
 350        if (snprintf(newref, sizeof(newref), "refs/heads/%s", newname) > sizeof(newref))
 351                die("New branchname too long");
 352
 353        if (check_ref_format(newref))
 354                die("Invalid branch name: %s", newref);
 355
 356        if (resolve_ref(newref, sha1, 1, NULL) && !force)
 357                die("A branch named '%s' already exists.", newname);
 358
 359        snprintf(logmsg, sizeof(logmsg), "Branch: renamed %s to %s",
 360                 oldref, newref);
 361
 362        if (rename_ref(oldref, newref, logmsg))
 363                die("Branch rename failed");
 364
 365        if (!strcmp(oldname, head) && create_symref("HEAD", newref))
 366                die("Branch renamed to %s, but HEAD is not updated!", newname);
 367}
 368
 369int cmd_branch(int argc, const char **argv, const char *prefix)
 370{
 371        int delete = 0, force_delete = 0, force_create = 0;
 372        int rename = 0, force_rename = 0;
 373        int verbose = 0, abbrev = DEFAULT_ABBREV;
 374        int reflog = 0;
 375        int kinds = REF_LOCAL_BRANCH;
 376        int i;
 377
 378        setup_ident();
 379        git_config(git_branch_config);
 380
 381        for (i = 1; i < argc; i++) {
 382                const char *arg = argv[i];
 383
 384                if (arg[0] != '-')
 385                        break;
 386                if (!strcmp(arg, "--")) {
 387                        i++;
 388                        break;
 389                }
 390                if (!strcmp(arg, "-d")) {
 391                        delete = 1;
 392                        continue;
 393                }
 394                if (!strcmp(arg, "-D")) {
 395                        delete = 1;
 396                        force_delete = 1;
 397                        continue;
 398                }
 399                if (!strcmp(arg, "-f")) {
 400                        force_create = 1;
 401                        continue;
 402                }
 403                if (!strcmp(arg, "-m")) {
 404                        rename = 1;
 405                        continue;
 406                }
 407                if (!strcmp(arg, "-M")) {
 408                        rename = 1;
 409                        force_rename = 1;
 410                        continue;
 411                }
 412                if (!strcmp(arg, "-r")) {
 413                        kinds = REF_REMOTE_BRANCH;
 414                        continue;
 415                }
 416                if (!strcmp(arg, "-a")) {
 417                        kinds = REF_REMOTE_BRANCH | REF_LOCAL_BRANCH;
 418                        continue;
 419                }
 420                if (!strcmp(arg, "-l")) {
 421                        reflog = 1;
 422                        continue;
 423                }
 424                if (!strncmp(arg, "--abbrev=", 9)) {
 425                        abbrev = atoi(arg+9);
 426                        continue;
 427                }
 428                if (!strcmp(arg, "-v")) {
 429                        verbose = 1;
 430                        continue;
 431                }
 432                if (!strcmp(arg, "--color")) {
 433                        branch_use_color = 1;
 434                        continue;
 435                }
 436                if (!strcmp(arg, "--no-color")) {
 437                        branch_use_color = 0;
 438                        continue;
 439                }
 440                usage(builtin_branch_usage);
 441        }
 442
 443        if ((delete && rename) || (delete && force_create) ||
 444            (rename && force_create))
 445                usage(builtin_branch_usage);
 446
 447        head = xstrdup(resolve_ref("HEAD", head_sha1, 0, NULL));
 448        if (!head)
 449                die("Failed to resolve HEAD as a valid ref.");
 450        if (strncmp(head, "refs/heads/", 11))
 451                die("HEAD not found below refs/heads!");
 452        head += 11;
 453
 454        if (delete)
 455                return delete_branches(argc - i, argv + i, force_delete, kinds);
 456        else if (i == argc)
 457                print_ref_list(kinds, verbose, abbrev);
 458        else if (rename && (i == argc - 1))
 459                rename_branch(head, argv[i], force_rename);
 460        else if (rename && (i == argc - 2))
 461                rename_branch(argv[i], argv[i + 1], force_rename);
 462        else if (i == argc - 1)
 463                create_branch(argv[i], head, force_create, reflog);
 464        else if (i == argc - 2)
 465                create_branch(argv[i], argv[i + 1], force_create, reflog);
 466        else
 467                usage(builtin_branch_usage);
 468
 469        return 0;
 470}