builtin-branch.c

   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
  17 static const char * const builtin_branch_usage[] = {
  18         "git-branch [options] [-r | -a]",
  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
  30 static const char *head;
  31 static unsigned char head_sha1[20];
  32
  33 static int branch_track = 1;
  34
  35 static int branch_use_color = -1;
  36 static char branch_colors[][COLOR_MAXLEN] = {
  37         "\033[m",       /* reset */
  38         "",             /* PLAIN (normal) */
  39         "\033[31m",     /* REMOTE (red) */
  40         "",             /* LOCAL (normal) */
  41         "\033[32m",     /* CURRENT (green) */
  42 };
  43 enum color_branch {
  44         COLOR_BRANCH_RESET = 0,
  45         COLOR_BRANCH_PLAIN = 1,
  46         COLOR_BRANCH_REMOTE = 2,
  47         COLOR_BRANCH_LOCAL = 3,
  48         COLOR_BRANCH_CURRENT = 4,
  49 };
  50
  51 static int parse_branch_color_slot(const char *var, int ofs)
  52 {
  53         if (!strcasecmp(var+ofs, "plain"))
  54                 return COLOR_BRANCH_PLAIN;
  55         if (!strcasecmp(var+ofs, "reset"))
  56                 return COLOR_BRANCH_RESET;
  57         if (!strcasecmp(var+ofs, "remote"))
  58                 return COLOR_BRANCH_REMOTE;
  59         if (!strcasecmp(var+ofs, "local"))
  60                 return COLOR_BRANCH_LOCAL;
  61         if (!strcasecmp(var+ofs, "current"))
  62                 return COLOR_BRANCH_CURRENT;
  63         die("bad config variable '%s'", var);
  64 }
  65
  66 static int git_branch_config(const char *var, const char *value)
  67 {
  68         if (!strcmp(var, "color.branch")) {
  69                 branch_use_color = git_config_colorbool(var, value, -1);
  70                 return 0;
  71         }
  72         if (!prefixcmp(var, "color.branch.")) {
  73                 int slot = parse_branch_color_slot(var, 13);
  74                 if (!value)
  75                         return config_error_nonbool(var);
  76                 color_parse(value, var, branch_colors[slot]);
  77                 return 0;
  78         }
  79         if (!strcmp(var, "branch.autosetupmerge")) {
  80                 branch_track = git_config_bool(var, value);
  81                 return 0;
  82         }
  83         return git_color_default_config(var, value);
  84 }
  85
  86 static const char *branch_get_color(enum color_branch ix)
  87 {
  88         if (branch_use_color > 0)
  89                 return branch_colors[ix];
  90         return "";
  91 }
  92
  93 static int delete_branches(int argc, const char **argv, int force, int kinds)
  94 {
  95         struct commit *rev, *head_rev = head_rev;
  96         unsigned char sha1[20];
  97         char *name = NULL;
  98         const char *fmt, *remote;
  99         char section[PATH_MAX];
 100         int i;
 101         int ret = 0;
 102
 103         switch (kinds) {
 104         case REF_REMOTE_BRANCH:
 105                 fmt = "refs/remotes/%s";
 106                 remote = "remote ";
 107                 force = 1;
 108                 break;
 109         case REF_LOCAL_BRANCH:
 110                 fmt = "refs/heads/%s";
 111                 remote = "";
 112                 break;
 113         default:
 114                 die("cannot use -a with -d");
 115         }
 116
 117         if (!force) {
 118                 head_rev = lookup_commit_reference(head_sha1);
 119                 if (!head_rev)
 120                         die("Couldn't look up commit object for HEAD");
 121         }
 122         for (i = 0; i < argc; i++) {
 123                 if (kinds == REF_LOCAL_BRANCH && !strcmp(head, argv[i])) {
 124                         error("Cannot delete the branch '%s' "
 125                                 "which you are currently on.", argv[i]);
 126                         ret = 1;
 127                         continue;
 128                 }
 129
 130                 if (name)
 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         if (name)
 177                 free(name);
 178
 179         return(ret);
 180 }
 181
 182 struct ref_item {
 183         char *name;
 184         unsigned int kind;
 185         unsigned char sha1[20];
 186 };
 187
 188 struct ref_list {
 189         int index, alloc, maxwidth;
 190         struct ref_item *list;
 191         struct commit_list *with_commit;
 192         int kinds;
 193 };
 194
 195 static int has_commit(const unsigned char *sha1, struct commit_list *with_commit)
 196 {
 197         struct commit *commit;
 198
 199         if (!with_commit)
 200                 return 1;
 201         commit = lookup_commit_reference_gently(sha1, 1);
 202         if (!commit)
 203                 return 0;
 204         while (with_commit) {
 205                 struct commit *other;
 206
 207                 other = with_commit->item;
 208                 with_commit = with_commit->next;
 209                 if (in_merge_bases(other, &commit, 1))
 210                         return 1;
 211         }
 212         return 0;
 213 }
 214
 215 static int append_ref(const char *refname, const unsigned char *sha1, int flags, void *cb_data)
 216 {
 217         struct ref_list *ref_list = (struct ref_list*)(cb_data);
 218         struct ref_item *newitem;
 219         int kind = REF_UNKNOWN_TYPE;
 220         int len;
 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         /* Resize buffer */
 243         if (ref_list->index >= ref_list->alloc) {
 244                 ref_list->alloc = alloc_nr(ref_list->alloc);
 245                 ref_list->list = xrealloc(ref_list->list,
 246                                 ref_list->alloc * sizeof(struct ref_item));
 247         }
 248
 249         /* Record the new item */
 250         newitem = &(ref_list->list[ref_list->index++]);
 251         newitem->name = xstrdup(refname);
 252         newitem->kind = kind;
 253         hashcpy(newitem->sha1, sha1);
 254         len = strlen(newitem->name);
 255         if (len > ref_list->maxwidth)
 256                 ref_list->maxwidth = len;
 257
 258         return 0;
 259 }
 260
 261 static void free_ref_list(struct ref_list *ref_list)
 262 {
 263         int i;
 264
 265         for (i = 0; i < ref_list->index; i++)
 266                 free(ref_list->list[i].name);
 267         free(ref_list->list);
 268 }
 269
 270 static int ref_cmp(const void *r1, const void *r2)
 271 {
 272         struct ref_item *c1 = (struct ref_item *)(r1);
 273         struct ref_item *c2 = (struct ref_item *)(r2);
 274
 275         if (c1->kind != c2->kind)
 276                 return c1->kind - c2->kind;
 277         return strcmp(c1->name, c2->name);
 278 }
 279
 280 static void print_ref_item(struct ref_item *item, int maxwidth, int verbose,
 281                            int abbrev, int current)
 282 {
 283         char c;
 284         int color;
 285         struct commit *commit;
 286
 287         switch (item->kind) {
 288         case REF_LOCAL_BRANCH:
 289                 color = COLOR_BRANCH_LOCAL;
 290                 break;
 291         case REF_REMOTE_BRANCH:
 292                 color = COLOR_BRANCH_REMOTE;
 293                 break;
 294         default:
 295                 color = COLOR_BRANCH_PLAIN;
 296                 break;
 297         }
 298
 299         c = ' ';
 300         if (current) {
 301                 c = '*';
 302                 color = COLOR_BRANCH_CURRENT;
 303         }
 304
 305         if (verbose) {
 306                 struct strbuf subject;
 307                 const char *sub = " **** invalid ref ****";
 308
 309                 strbuf_init(&subject, 0);
 310
 311                 commit = lookup_commit(item->sha1);
 312                 if (commit && !parse_commit(commit)) {
 313                         pretty_print_commit(CMIT_FMT_ONELINE, commit,
 314                                             &subject, 0, NULL, NULL, 0, 0);
 315                         sub = subject.buf;
 316                 }
 317                 printf("%c %s%-*s%s %s %s\n", c, branch_get_color(color),
 318                        maxwidth, item->name,
 319                        branch_get_color(COLOR_BRANCH_RESET),
 320                        find_unique_abbrev(item->sha1, abbrev), sub);
 321                 strbuf_release(&subject);
 322         } else {
 323                 printf("%c %s%s%s\n", c, branch_get_color(color), item->name,
 324                        branch_get_color(COLOR_BRANCH_RESET));
 325         }
 326 }
 327
 328 static void print_ref_list(int kinds, int detached, int verbose, int abbrev, struct commit_list *with_commit)
 329 {
 330         int i;
 331         struct ref_list ref_list;
 332
 333         memset(&ref_list, 0, sizeof(ref_list));
 334         ref_list.kinds = kinds;
 335         ref_list.with_commit = with_commit;
 336         for_each_ref(append_ref, &ref_list);
 337
 338         qsort(ref_list.list, ref_list.index, sizeof(struct ref_item), ref_cmp);
 339
 340         detached = (detached && (kinds & REF_LOCAL_BRANCH));
 341         if (detached && has_commit(head_sha1, with_commit)) {
 342                 struct ref_item item;
 343                 item.name = xstrdup("(no branch)");
 344                 item.kind = REF_LOCAL_BRANCH;
 345                 hashcpy(item.sha1, head_sha1);
 346                 if (strlen(item.name) > ref_list.maxwidth)
 347                               ref_list.maxwidth = strlen(item.name);
 348                 print_ref_item(&item, ref_list.maxwidth, verbose, abbrev, 1);
 349                 free(item.name);
 350         }
 351
 352         for (i = 0; i < ref_list.index; i++) {
 353                 int current = !detached &&
 354                         (ref_list.list[i].kind == REF_LOCAL_BRANCH) &&
 355                         !strcmp(ref_list.list[i].name, head);
 356                 print_ref_item(&ref_list.list[i], ref_list.maxwidth, verbose,
 357                                abbrev, current);
 358         }
 359
 360         free_ref_list(&ref_list);
 361 }
 362
 363 static void rename_branch(const char *oldname, const char *newname, int force)
 364 {
 365         char oldref[PATH_MAX], newref[PATH_MAX], logmsg[PATH_MAX*2 + 100];
 366         unsigned char sha1[20];
 367         char oldsection[PATH_MAX], newsection[PATH_MAX];
 368
 369         if (!oldname)
 370                 die("cannot rename the current branch while not on any.");
 371
 372         if (snprintf(oldref, sizeof(oldref), "refs/heads/%s", oldname) > sizeof(oldref))
 373                 die("Old branchname too long");
 374
 375         if (check_ref_format(oldref))
 376                 die("Invalid branch name: %s", oldref);
 377
 378         if (snprintf(newref, sizeof(newref), "refs/heads/%s", newname) > sizeof(newref))
 379                 die("New branchname too long");
 380
 381         if (check_ref_format(newref))
 382                 die("Invalid branch name: %s", newref);
 383
 384         if (resolve_ref(newref, sha1, 1, NULL) && !force)
 385                 die("A branch named '%s' already exists.", newname);
 386
 387         snprintf(logmsg, sizeof(logmsg), "Branch: renamed %s to %s",
 388                  oldref, newref);
 389
 390         if (rename_ref(oldref, newref, logmsg))
 391                 die("Branch rename failed");
 392
 393         /* no need to pass logmsg here as HEAD didn't really move */
 394         if (!strcmp(oldname, head) && create_symref("HEAD", newref, NULL))
 395                 die("Branch renamed to %s, but HEAD is not updated!", newname);
 396
 397         snprintf(oldsection, sizeof(oldsection), "branch.%s", oldref + 11);
 398         snprintf(newsection, sizeof(newsection), "branch.%s", newref + 11);
 399         if (git_config_rename_section(oldsection, newsection) < 0)
 400                 die("Branch is renamed, but update of config-file failed");
 401 }
 402
 403 static int opt_parse_with_commit(const struct option *opt, const char *arg, int unset)
 404 {
 405         unsigned char sha1[20];
 406         struct commit *commit;
 407
 408         if (!arg)
 409                 return -1;
 410         if (get_sha1(arg, sha1))
 411                 die("malformed object name %s", arg);
 412         commit = lookup_commit_reference(sha1);
 413         if (!commit)
 414                 die("no such commit %s", arg);
 415         commit_list_insert(commit, opt->value);
 416         return 0;
 417 }
 418
 419 int cmd_branch(int argc, const char **argv, const char *prefix)
 420 {
 421         int delete = 0, rename = 0, force_create = 0;
 422         int verbose = 0, abbrev = DEFAULT_ABBREV, detached = 0;
 423         int reflog = 0, track;
 424         int kinds = REF_LOCAL_BRANCH;
 425         struct commit_list *with_commit = NULL;
 426
 427         struct option options[] = {
 428                 OPT_GROUP("Generic options"),
 429                 OPT__VERBOSE(&verbose),
 430                 OPT_BOOLEAN( 0 , "track",  &track, "set up tracking mode (see git-pull(1))"),
 431                 OPT_BOOLEAN( 0 , "color",  &branch_use_color, "use colored output"),
 432                 OPT_SET_INT('r', NULL,     &kinds, "act on remote-tracking branches",
 433                         REF_REMOTE_BRANCH),
 434                 OPT_CALLBACK(0, "contains", &with_commit, "commit",
 435                              "print only branches that contain the commit",
 436                              opt_parse_with_commit),
 437                 {
 438                         OPTION_CALLBACK, 0, "with", &with_commit, "commit",
 439                         "print only branches that contain the commit",
 440                         PARSE_OPT_HIDDEN, opt_parse_with_commit,
 441                 },
 442                 OPT__ABBREV(&abbrev),
 443
 444                 OPT_GROUP("Specific git-branch actions:"),
 445                 OPT_SET_INT('a', NULL, &kinds, "list both remote-tracking and local branches",
 446                         REF_REMOTE_BRANCH | REF_LOCAL_BRANCH),
 447                 OPT_BIT('d', NULL, &delete, "delete fully merged branch", 1),
 448                 OPT_BIT('D', NULL, &delete, "delete branch (even if not merged)", 2),
 449                 OPT_BIT('m', NULL, &rename, "move/rename a branch and its reflog", 1),
 450                 OPT_BIT('M', NULL, &rename, "move/rename a branch, even if target exists", 2),
 451                 OPT_BOOLEAN('l', NULL, &reflog, "create the branch's reflog"),
 452                 OPT_BOOLEAN('f', NULL, &force_create, "force creation (when already exists)"),
 453                 OPT_END(),
 454         };
 455
 456         git_config(git_branch_config);
 457
 458         if (branch_use_color == -1)
 459                 branch_use_color = git_use_color_default;
 460
 461         track = branch_track;
 462         argc = parse_options(argc, argv, options, builtin_branch_usage, 0);
 463         if (!!delete + !!rename + !!force_create > 1)
 464                 usage_with_options(builtin_branch_usage, options);
 465
 466         head = resolve_ref("HEAD", head_sha1, 0, NULL);
 467         if (!head)
 468                 die("Failed to resolve HEAD as a valid ref.");
 469         head = xstrdup(head);
 470         if (!strcmp(head, "HEAD")) {
 471                 detached = 1;
 472         } else {
 473                 if (prefixcmp(head, "refs/heads/"))
 474                         die("HEAD not found below refs/heads!");
 475                 head += 11;
 476         }
 477
 478         if (delete)
 479                 return delete_branches(argc, argv, delete > 1, kinds);
 480         else if (argc == 0)
 481                 print_ref_list(kinds, detached, verbose, abbrev, with_commit);
 482         else if (rename && (argc == 1))
 483                 rename_branch(head, argv[0], rename > 1);
 484         else if (rename && (argc == 2))
 485                 rename_branch(argv[0], argv[1], rename > 1);
 486         else if (argc <= 2)
 487                 create_branch(head, argv[0], (argc == 2) ? argv[1] : head,
 488                               force_create, reflog, track);
 489         else
 490                 usage_with_options(builtin_branch_usage, options);
 491
 492         return 0;
 493 }