builtin/bisect.c

   1 #include "builtin.h"
   2 #include "copy.h"
   3 #include "environment.h"
   4 #include "gettext.h"
   5 #include "hex.h"
   6 #include "object-name.h"
   7 #include "parse-options.h"
   8 #include "bisect.h"
   9 #include "refs.h"
  10 #include "strvec.h"
  11 #include "run-command.h"
  12 #include "oid-array.h"
  13 #include "path.h"
  14 #include "prompt.h"
  15 #include "quote.h"
  16 #include "revision.h"
  17
  18 static GIT_PATH_FUNC(git_path_bisect_terms, "BISECT_TERMS")
  19 static GIT_PATH_FUNC(git_path_bisect_ancestors_ok, "BISECT_ANCESTORS_OK")
  20 static GIT_PATH_FUNC(git_path_bisect_start, "BISECT_START")
  21 static GIT_PATH_FUNC(git_path_bisect_log, "BISECT_LOG")
  22 static GIT_PATH_FUNC(git_path_bisect_names, "BISECT_NAMES")
  23 static GIT_PATH_FUNC(git_path_bisect_first_parent, "BISECT_FIRST_PARENT")
  24 static GIT_PATH_FUNC(git_path_bisect_run, "BISECT_RUN")
  25
  26 #define BUILTIN_GIT_BISECT_START_USAGE \
  27         N_("git bisect start [--term-(new|bad)=<term> --term-(old|good)=<term>]" \
  28            "    [--no-checkout] [--first-parent] [<bad> [<good>...]] [--]" \
  29            "    [<pathspec>...]")
  30 #define BUILTIN_GIT_BISECT_STATE_USAGE \
  31         N_("git bisect (good|bad) [<rev>...]")
  32 #define BUILTIN_GIT_BISECT_TERMS_USAGE \
  33         "git bisect terms [--term-good | --term-bad]"
  34 #define BUILTIN_GIT_BISECT_SKIP_USAGE \
  35         N_("git bisect skip [(<rev>|<range>)...]")
  36 #define BUILTIN_GIT_BISECT_NEXT_USAGE \
  37         "git bisect next"
  38 #define BUILTIN_GIT_BISECT_RESET_USAGE \
  39         N_("git bisect reset [<commit>]")
  40 #define BUILTIN_GIT_BISECT_VISUALIZE_USAGE \
  41         "git bisect visualize"
  42 #define BUILTIN_GIT_BISECT_REPLAY_USAGE \
  43         N_("git bisect replay <logfile>")
  44 #define BUILTIN_GIT_BISECT_LOG_USAGE \
  45         "git bisect log"
  46 #define BUILTIN_GIT_BISECT_RUN_USAGE \
  47         N_("git bisect run <cmd> [<arg>...]")
  48
  49 static const char * const git_bisect_usage[] = {
  50         BUILTIN_GIT_BISECT_START_USAGE,
  51         BUILTIN_GIT_BISECT_STATE_USAGE,
  52         BUILTIN_GIT_BISECT_TERMS_USAGE,
  53         BUILTIN_GIT_BISECT_SKIP_USAGE,
  54         BUILTIN_GIT_BISECT_NEXT_USAGE,
  55         BUILTIN_GIT_BISECT_RESET_USAGE,
  56         BUILTIN_GIT_BISECT_VISUALIZE_USAGE,
  57         BUILTIN_GIT_BISECT_REPLAY_USAGE,
  58         BUILTIN_GIT_BISECT_LOG_USAGE,
  59         BUILTIN_GIT_BISECT_RUN_USAGE,
  60         NULL
  61 };
  62
  63 struct add_bisect_ref_data {
  64         struct rev_info *revs;
  65         unsigned int object_flags;
  66 };
  67
  68 struct bisect_terms {
  69         char *term_good;
  70         char *term_bad;
  71 };
  72
  73 static void free_terms(struct bisect_terms *terms)
  74 {
  75         FREE_AND_NULL(terms->term_good);
  76         FREE_AND_NULL(terms->term_bad);
  77 }
  78
  79 static void set_terms(struct bisect_terms *terms, const char *bad,
  80                       const char *good)
  81 {
  82         free((void *)terms->term_good);
  83         terms->term_good = xstrdup(good);
  84         free((void *)terms->term_bad);
  85         terms->term_bad = xstrdup(bad);
  86 }
  87
  88 static const char vocab_bad[] = "bad|new";
  89 static const char vocab_good[] = "good|old";
  90
  91 static int bisect_autostart(struct bisect_terms *terms);
  92
  93 /*
  94  * Check whether the string `term` belongs to the set of strings
  95  * included in the variable arguments.
  96  */
  97 LAST_ARG_MUST_BE_NULL
  98 static int one_of(const char *term, ...)
  99 {
 100         int res = 0;
 101         va_list matches;
 102         const char *match;
 103
 104         va_start(matches, term);
 105         while (!res && (match = va_arg(matches, const char *)))
 106                 res = !strcmp(term, match);
 107         va_end(matches);
 108
 109         return res;
 110 }
 111
 112 /*
 113  * return code BISECT_INTERNAL_SUCCESS_MERGE_BASE
 114  * and BISECT_INTERNAL_SUCCESS_1ST_BAD_FOUND are codes
 115  * that indicate special success.
 116  */
 117
 118 static int is_bisect_success(enum bisect_error res)
 119 {
 120         return !res ||
 121                 res == BISECT_INTERNAL_SUCCESS_1ST_BAD_FOUND ||
 122                 res == BISECT_INTERNAL_SUCCESS_MERGE_BASE;
 123 }
 124
 125 static int write_in_file(const char *path, const char *mode, const char *format, va_list args)
 126 {
 127         FILE *fp = NULL;
 128         int res = 0;
 129
 130         if (strcmp(mode, "w") && strcmp(mode, "a"))
 131                 BUG("write-in-file does not support '%s' mode", mode);
 132         fp = fopen(path, mode);
 133         if (!fp)
 134                 return error_errno(_("cannot open file '%s' in mode '%s'"), path, mode);
 135         res = vfprintf(fp, format, args);
 136
 137         if (res < 0) {
 138                 int saved_errno = errno;
 139                 fclose(fp);
 140                 errno = saved_errno;
 141                 return error_errno(_("could not write to file '%s'"), path);
 142         }
 143
 144         return fclose(fp);
 145 }
 146
 147 __attribute__((format (printf, 2, 3)))
 148 static int write_to_file(const char *path, const char *format, ...)
 149 {
 150         int res;
 151         va_list args;
 152
 153         va_start(args, format);
 154         res = write_in_file(path, "w", format, args);
 155         va_end(args);
 156
 157         return res;
 158 }
 159
 160 __attribute__((format (printf, 2, 3)))
 161 static int append_to_file(const char *path, const char *format, ...)
 162 {
 163         int res;
 164         va_list args;
 165
 166         va_start(args, format);
 167         res = write_in_file(path, "a", format, args);
 168         va_end(args);
 169
 170         return res;
 171 }
 172
 173 static int print_file_to_stdout(const char *path)
 174 {
 175         int fd = open(path, O_RDONLY);
 176         int ret = 0;
 177
 178         if (fd < 0)
 179                 return error_errno(_("cannot open file '%s' for reading"), path);
 180         if (copy_fd(fd, 1) < 0)
 181                 ret = error_errno(_("failed to read '%s'"), path);
 182         close(fd);
 183         return ret;
 184 }
 185
 186 static int check_term_format(const char *term, const char *orig_term)
 187 {
 188         int res;
 189         char *new_term = xstrfmt("refs/bisect/%s", term);
 190
 191         res = check_refname_format(new_term, 0);
 192         free(new_term);
 193
 194         if (res)
 195                 return error(_("'%s' is not a valid term"), term);
 196
 197         if (one_of(term, "help", "start", "skip", "next", "reset",
 198                         "visualize", "view", "replay", "log", "run", "terms", NULL))
 199                 return error(_("can't use the builtin command '%s' as a term"), term);
 200
 201         /*
 202          * In theory, nothing prevents swapping completely good and bad,
 203          * but this situation could be confusing and hasn't been tested
 204          * enough. Forbid it for now.
 205          */
 206
 207         if ((strcmp(orig_term, "bad") && one_of(term, "bad", "new", NULL)) ||
 208                  (strcmp(orig_term, "good") && one_of(term, "good", "old", NULL)))
 209                 return error(_("can't change the meaning of the term '%s'"), term);
 210
 211         return 0;
 212 }
 213
 214 static int write_terms(const char *bad, const char *good)
 215 {
 216         int res;
 217
 218         if (!strcmp(bad, good))
 219                 return error(_("please use two different terms"));
 220
 221         if (check_term_format(bad, "bad") || check_term_format(good, "good"))
 222                 return -1;
 223
 224         res = write_to_file(git_path_bisect_terms(), "%s\n%s\n", bad, good);
 225
 226         return res;
 227 }
 228
 229 static int bisect_reset(const char *commit)
 230 {
 231         struct strbuf branch = STRBUF_INIT;
 232
 233         if (!commit) {
 234                 if (!strbuf_read_file(&branch, git_path_bisect_start(), 0))
 235                         printf(_("We are not bisecting.\n"));
 236                 else
 237                         strbuf_rtrim(&branch);
 238         } else {
 239                 struct object_id oid;
 240
 241                 if (repo_get_oid_commit(the_repository, commit, &oid))
 242                         return error(_("'%s' is not a valid commit"), commit);
 243                 strbuf_addstr(&branch, commit);
 244         }
 245
 246         if (branch.len && !refs_ref_exists(get_main_ref_store(the_repository), "BISECT_HEAD")) {
 247                 struct child_process cmd = CHILD_PROCESS_INIT;
 248
 249                 cmd.git_cmd = 1;
 250                 strvec_pushl(&cmd.args, "checkout", "--ignore-other-worktrees",
 251                                 branch.buf, "--", NULL);
 252                 if (run_command(&cmd)) {
 253                         error(_("could not check out original"
 254                                 " HEAD '%s'. Try 'git bisect"
 255                                 " reset <commit>'."), branch.buf);
 256                         strbuf_release(&branch);
 257                         return -1;
 258                 }
 259         }
 260
 261         strbuf_release(&branch);
 262         return bisect_clean_state();
 263 }
 264
 265 static void log_commit(FILE *fp,
 266                        const char *fmt, const char *state,
 267                        struct commit *commit)
 268 {
 269         struct pretty_print_context pp = {0};
 270         struct strbuf commit_msg = STRBUF_INIT;
 271         char *label = xstrfmt(fmt, state);
 272
 273         repo_format_commit_message(the_repository, commit, "%s", &commit_msg,
 274                                    &pp);
 275
 276         fprintf(fp, "# %s: [%s] %s\n", label, oid_to_hex(&commit->object.oid),
 277                 commit_msg.buf);
 278
 279         strbuf_release(&commit_msg);
 280         free(label);
 281 }
 282
 283 static int bisect_write(const char *state, const char *rev,
 284                         const struct bisect_terms *terms, int nolog)
 285 {
 286         struct strbuf tag = STRBUF_INIT;
 287         struct object_id oid;
 288         struct commit *commit;
 289         FILE *fp = NULL;
 290         int res = 0;
 291
 292         if (!strcmp(state, terms->term_bad)) {
 293                 strbuf_addf(&tag, "refs/bisect/%s", state);
 294         } else if (one_of(state, terms->term_good, "skip", NULL)) {
 295                 strbuf_addf(&tag, "refs/bisect/%s-%s", state, rev);
 296         } else {
 297                 res = error(_("Bad bisect_write argument: %s"), state);
 298                 goto finish;
 299         }
 300
 301         if (repo_get_oid(the_repository, rev, &oid)) {
 302                 res = error(_("couldn't get the oid of the rev '%s'"), rev);
 303                 goto finish;
 304         }
 305
 306         if (refs_update_ref(get_main_ref_store(the_repository), NULL, tag.buf, &oid, NULL, 0,
 307                             UPDATE_REFS_MSG_ON_ERR)) {
 308                 res = -1;
 309                 goto finish;
 310         }
 311
 312         fp = fopen(git_path_bisect_log(), "a");
 313         if (!fp) {
 314                 res = error_errno(_("couldn't open the file '%s'"), git_path_bisect_log());
 315                 goto finish;
 316         }
 317
 318         commit = lookup_commit_reference(the_repository, &oid);
 319         log_commit(fp, "%s", state, commit);
 320
 321         if (!nolog)
 322                 fprintf(fp, "git bisect %s %s\n", state, rev);
 323
 324 finish:
 325         if (fp)
 326                 fclose(fp);
 327         strbuf_release(&tag);
 328         return res;
 329 }
 330
 331 static int check_and_set_terms(struct bisect_terms *terms, const char *cmd)
 332 {
 333         int has_term_file = !is_empty_or_missing_file(git_path_bisect_terms());
 334
 335         if (one_of(cmd, "skip", "start", "terms", NULL))
 336                 return 0;
 337
 338         if (has_term_file && strcmp(cmd, terms->term_bad) &&
 339             strcmp(cmd, terms->term_good))
 340                 return error(_("Invalid command: you're currently in a "
 341                                 "%s/%s bisect"), terms->term_bad,
 342                                 terms->term_good);
 343
 344         if (!has_term_file) {
 345                 if (one_of(cmd, "bad", "good", NULL)) {
 346                         set_terms(terms, "bad", "good");
 347                         return write_terms(terms->term_bad, terms->term_good);
 348                 }
 349                 if (one_of(cmd, "new", "old", NULL)) {
 350                         set_terms(terms, "new", "old");
 351                         return write_terms(terms->term_bad, terms->term_good);
 352                 }
 353         }
 354
 355         return 0;
 356 }
 357
 358 static int inc_nr(const char *refname UNUSED,
 359                   const struct object_id *oid UNUSED,
 360                   int flag UNUSED, void *cb_data)
 361 {
 362         unsigned int *nr = (unsigned int *)cb_data;
 363         (*nr)++;
 364         return 0;
 365 }
 366
 367 static const char need_bad_and_good_revision_warning[] =
 368         N_("You need to give me at least one %s and %s revision.\n"
 369            "You can use \"git bisect %s\" and \"git bisect %s\" for that.");
 370
 371 static const char need_bisect_start_warning[] =
 372         N_("You need to start by \"git bisect start\".\n"
 373            "You then need to give me at least one %s and %s revision.\n"
 374            "You can use \"git bisect %s\" and \"git bisect %s\" for that.");
 375
 376 static int decide_next(const struct bisect_terms *terms,
 377                        const char *current_term, int missing_good,
 378                        int missing_bad)
 379 {
 380         if (!missing_good && !missing_bad)
 381                 return 0;
 382         if (!current_term)
 383                 return -1;
 384
 385         if (missing_good && !missing_bad &&
 386             !strcmp(current_term, terms->term_good)) {
 387                 char *yesno;
 388                 /*
 389                  * have bad (or new) but not good (or old). We could bisect
 390                  * although this is less optimum.
 391                  */
 392                 warning(_("bisecting only with a %s commit"), terms->term_bad);
 393                 if (!isatty(0))
 394                         return 0;
 395                 /*
 396                  * TRANSLATORS: Make sure to include [Y] and [n] in your
 397                  * translation. The program will only accept English input
 398                  * at this point.
 399                  */
 400                 yesno = git_prompt(_("Are you sure [Y/n]? "), PROMPT_ECHO);
 401                 if (starts_with(yesno, "N") || starts_with(yesno, "n"))
 402                         return -1;
 403                 return 0;
 404         }
 405
 406         if (!is_empty_or_missing_file(git_path_bisect_start()))
 407                 return error(_(need_bad_and_good_revision_warning),
 408                              vocab_bad, vocab_good, vocab_bad, vocab_good);
 409         else
 410                 return error(_(need_bisect_start_warning),
 411                              vocab_good, vocab_bad, vocab_good, vocab_bad);
 412 }
 413
 414 static void bisect_status(struct bisect_state *state,
 415                           const struct bisect_terms *terms)
 416 {
 417         char *bad_ref = xstrfmt("refs/bisect/%s", terms->term_bad);
 418         char *good_glob = xstrfmt("%s-*", terms->term_good);
 419
 420         if (refs_ref_exists(get_main_ref_store(the_repository), bad_ref))
 421                 state->nr_bad = 1;
 422
 423         refs_for_each_glob_ref_in(get_main_ref_store(the_repository), inc_nr,
 424                                   good_glob, "refs/bisect/",
 425                                   (void *) &state->nr_good);
 426
 427         free(good_glob);
 428         free(bad_ref);
 429 }
 430
 431 __attribute__((format (printf, 1, 2)))
 432 static void bisect_log_printf(const char *fmt, ...)
 433 {
 434         struct strbuf buf = STRBUF_INIT;
 435         va_list ap;
 436
 437         va_start(ap, fmt);
 438         strbuf_vaddf(&buf, fmt, ap);
 439         va_end(ap);
 440
 441         printf("%s", buf.buf);
 442         append_to_file(git_path_bisect_log(), "# %s", buf.buf);
 443
 444         strbuf_release(&buf);
 445 }
 446
 447 static void bisect_print_status(const struct bisect_terms *terms)
 448 {
 449         struct bisect_state state = { 0 };
 450
 451         bisect_status(&state, terms);
 452
 453         /* If we had both, we'd already be started, and shouldn't get here. */
 454         if (state.nr_good && state.nr_bad)
 455                 return;
 456
 457         if (!state.nr_good && !state.nr_bad)
 458                 bisect_log_printf(_("status: waiting for both good and bad commits\n"));
 459         else if (state.nr_good)
 460                 bisect_log_printf(Q_("status: waiting for bad commit, %d good commit known\n",
 461                                      "status: waiting for bad commit, %d good commits known\n",
 462                                      state.nr_good), state.nr_good);
 463         else
 464                 bisect_log_printf(_("status: waiting for good commit(s), bad commit known\n"));
 465 }
 466
 467 static int bisect_next_check(const struct bisect_terms *terms,
 468                              const char *current_term)
 469 {
 470         struct bisect_state state = { 0 };
 471         bisect_status(&state, terms);
 472         return decide_next(terms, current_term, !state.nr_good, !state.nr_bad);
 473 }
 474
 475 static int get_terms(struct bisect_terms *terms)
 476 {
 477         struct strbuf str = STRBUF_INIT;
 478         FILE *fp = NULL;
 479         int res = 0;
 480
 481         fp = fopen(git_path_bisect_terms(), "r");
 482         if (!fp) {
 483                 res = -1;
 484                 goto finish;
 485         }
 486
 487         free_terms(terms);
 488         strbuf_getline_lf(&str, fp);
 489         terms->term_bad = strbuf_detach(&str, NULL);
 490         strbuf_getline_lf(&str, fp);
 491         terms->term_good = strbuf_detach(&str, NULL);
 492
 493 finish:
 494         if (fp)
 495                 fclose(fp);
 496         strbuf_release(&str);
 497         return res;
 498 }
 499
 500 static int bisect_terms(struct bisect_terms *terms, const char *option)
 501 {
 502         if (get_terms(terms))
 503                 return error(_("no terms defined"));
 504
 505         if (!option) {
 506                 printf(_("Your current terms are %s for the old state\n"
 507                          "and %s for the new state.\n"),
 508                        terms->term_good, terms->term_bad);
 509                 return 0;
 510         }
 511         if (one_of(option, "--term-good", "--term-old", NULL))
 512                 printf("%s\n", terms->term_good);
 513         else if (one_of(option, "--term-bad", "--term-new", NULL))
 514                 printf("%s\n", terms->term_bad);
 515         else
 516                 return error(_("invalid argument %s for 'git bisect terms'.\n"
 517                                "Supported options are: "
 518                                "--term-good|--term-old and "
 519                                "--term-bad|--term-new."), option);
 520
 521         return 0;
 522 }
 523
 524 static int bisect_append_log_quoted(const char **argv)
 525 {
 526         int res = 0;
 527         FILE *fp = fopen(git_path_bisect_log(), "a");
 528         struct strbuf orig_args = STRBUF_INIT;
 529
 530         if (!fp)
 531                 return -1;
 532
 533         if (fprintf(fp, "git bisect start") < 1) {
 534                 res = -1;
 535                 goto finish;
 536         }
 537
 538         sq_quote_argv(&orig_args, argv);
 539         if (fprintf(fp, "%s\n", orig_args.buf) < 1)
 540                 res = -1;
 541
 542 finish:
 543         fclose(fp);
 544         strbuf_release(&orig_args);
 545         return res;
 546 }
 547
 548 static int add_bisect_ref(const char *refname, const struct object_id *oid,
 549                           int flags UNUSED, void *cb)
 550 {
 551         struct add_bisect_ref_data *data = cb;
 552
 553         add_pending_oid(data->revs, refname, oid, data->object_flags);
 554
 555         return 0;
 556 }
 557
 558 static int prepare_revs(struct bisect_terms *terms, struct rev_info *revs)
 559 {
 560         int res = 0;
 561         struct add_bisect_ref_data cb = { revs };
 562         char *good = xstrfmt("%s-*", terms->term_good);
 563
 564         /*
 565          * We cannot use terms->term_bad directly in
 566          * for_each_glob_ref_in() and we have to append a '*' to it,
 567          * otherwise for_each_glob_ref_in() will append '/' and '*'.
 568          */
 569         char *bad = xstrfmt("%s*", terms->term_bad);
 570
 571         /*
 572          * It is important to reset the flags used by revision walks
 573          * as the previous call to bisect_next_all() in turn
 574          * sets up a revision walk.
 575          */
 576         reset_revision_walk();
 577         repo_init_revisions(the_repository, revs, NULL);
 578         setup_revisions(0, NULL, revs, NULL);
 579         refs_for_each_glob_ref_in(get_main_ref_store(the_repository),
 580                                   add_bisect_ref, bad, "refs/bisect/", &cb);
 581         cb.object_flags = UNINTERESTING;
 582         refs_for_each_glob_ref_in(get_main_ref_store(the_repository),
 583                                   add_bisect_ref, good, "refs/bisect/", &cb);
 584         if (prepare_revision_walk(revs))
 585                 res = error(_("revision walk setup failed\n"));
 586
 587         free(good);
 588         free(bad);
 589         return res;
 590 }
 591
 592 static int bisect_skipped_commits(struct bisect_terms *terms)
 593 {
 594         int res;
 595         FILE *fp = NULL;
 596         struct rev_info revs;
 597         struct commit *commit;
 598         struct pretty_print_context pp = {0};
 599         struct strbuf commit_name = STRBUF_INIT;
 600
 601         res = prepare_revs(terms, &revs);
 602         if (res)
 603                 return res;
 604
 605         fp = fopen(git_path_bisect_log(), "a");
 606         if (!fp)
 607                 return error_errno(_("could not open '%s' for appending"),
 608                                   git_path_bisect_log());
 609
 610         if (fprintf(fp, "# only skipped commits left to test\n") < 0)
 611                 return error_errno(_("failed to write to '%s'"), git_path_bisect_log());
 612
 613         while ((commit = get_revision(&revs)) != NULL) {
 614                 strbuf_reset(&commit_name);
 615                 repo_format_commit_message(the_repository, commit, "%s",
 616                                            &commit_name, &pp);
 617                 fprintf(fp, "# possible first %s commit: [%s] %s\n",
 618                         terms->term_bad, oid_to_hex(&commit->object.oid),
 619                         commit_name.buf);
 620         }
 621
 622         /*
 623          * Reset the flags used by revision walks in case
 624          * there is another revision walk after this one.
 625          */
 626         reset_revision_walk();
 627
 628         strbuf_release(&commit_name);
 629         release_revisions(&revs);
 630         fclose(fp);
 631         return 0;
 632 }
 633
 634 static int bisect_successful(struct bisect_terms *terms)
 635 {
 636         struct object_id oid;
 637         struct commit *commit;
 638         struct pretty_print_context pp = {0};
 639         struct strbuf commit_name = STRBUF_INIT;
 640         char *bad_ref = xstrfmt("refs/bisect/%s",terms->term_bad);
 641         int res;
 642
 643         refs_read_ref(get_main_ref_store(the_repository), bad_ref, &oid);
 644         commit = lookup_commit_reference_by_name(bad_ref);
 645         repo_format_commit_message(the_repository, commit, "%s", &commit_name,
 646                                    &pp);
 647
 648         res = append_to_file(git_path_bisect_log(), "# first %s commit: [%s] %s\n",
 649                             terms->term_bad, oid_to_hex(&commit->object.oid),
 650                             commit_name.buf);
 651
 652         strbuf_release(&commit_name);
 653         free(bad_ref);
 654         return res;
 655 }
 656
 657 static enum bisect_error bisect_next(struct bisect_terms *terms, const char *prefix)
 658 {
 659         enum bisect_error res;
 660
 661         if (bisect_autostart(terms))
 662                 return BISECT_FAILED;
 663
 664         if (bisect_next_check(terms, terms->term_good))
 665                 return BISECT_FAILED;
 666
 667         /* Perform all bisection computation */
 668         res = bisect_next_all(the_repository, prefix);
 669
 670         if (res == BISECT_INTERNAL_SUCCESS_1ST_BAD_FOUND) {
 671                 res = bisect_successful(terms);
 672                 return res ? res : BISECT_INTERNAL_SUCCESS_1ST_BAD_FOUND;
 673         } else if (res == BISECT_ONLY_SKIPPED_LEFT) {
 674                 res = bisect_skipped_commits(terms);
 675                 return res ? res : BISECT_ONLY_SKIPPED_LEFT;
 676         }
 677         return res;
 678 }
 679
 680 static enum bisect_error bisect_auto_next(struct bisect_terms *terms, const char *prefix)
 681 {
 682         if (bisect_next_check(terms, NULL)) {
 683                 bisect_print_status(terms);
 684                 return BISECT_OK;
 685         }
 686
 687         return bisect_next(terms, prefix);
 688 }
 689
 690 static enum bisect_error bisect_start(struct bisect_terms *terms, int argc,
 691                                       const char **argv)
 692 {
 693         int no_checkout = 0;
 694         int first_parent_only = 0;
 695         int i, has_double_dash = 0, must_write_terms = 0, bad_seen = 0;
 696         int flags, pathspec_pos;
 697         enum bisect_error res = BISECT_OK;
 698         struct string_list revs = STRING_LIST_INIT_DUP;
 699         struct string_list states = STRING_LIST_INIT_DUP;
 700         struct strbuf start_head = STRBUF_INIT;
 701         struct strbuf bisect_names = STRBUF_INIT;
 702         struct object_id head_oid;
 703         struct object_id oid;
 704         const char *head;
 705
 706         if (is_bare_repository())
 707                 no_checkout = 1;
 708
 709         /*
 710          * Check for one bad and then some good revisions
 711          */
 712         for (i = 0; i < argc; i++) {
 713                 if (!strcmp(argv[i], "--")) {
 714                         has_double_dash = 1;
 715                         break;
 716                 }
 717         }
 718
 719         for (i = 0; i < argc; i++) {
 720                 const char *arg = argv[i];
 721                 if (!strcmp(argv[i], "--")) {
 722                         break;
 723                 } else if (!strcmp(arg, "--no-checkout")) {
 724                         no_checkout = 1;
 725                 } else if (!strcmp(arg, "--first-parent")) {
 726                         first_parent_only = 1;
 727                 } else if (!strcmp(arg, "--term-good") ||
 728                          !strcmp(arg, "--term-old")) {
 729                         i++;
 730                         if (argc <= i)
 731                                 return error(_("'' is not a valid term"));
 732                         must_write_terms = 1;
 733                         free((void *) terms->term_good);
 734                         terms->term_good = xstrdup(argv[i]);
 735                 } else if (skip_prefix(arg, "--term-good=", &arg) ||
 736                            skip_prefix(arg, "--term-old=", &arg)) {
 737                         must_write_terms = 1;
 738                         free((void *) terms->term_good);
 739                         terms->term_good = xstrdup(arg);
 740                 } else if (!strcmp(arg, "--term-bad") ||
 741                          !strcmp(arg, "--term-new")) {
 742                         i++;
 743                         if (argc <= i)
 744                                 return error(_("'' is not a valid term"));
 745                         must_write_terms = 1;
 746                         free((void *) terms->term_bad);
 747                         terms->term_bad = xstrdup(argv[i]);
 748                 } else if (skip_prefix(arg, "--term-bad=", &arg) ||
 749                            skip_prefix(arg, "--term-new=", &arg)) {
 750                         must_write_terms = 1;
 751                         free((void *) terms->term_bad);
 752                         terms->term_bad = xstrdup(arg);
 753                 } else if (starts_with(arg, "--")) {
 754                         return error(_("unrecognized option: '%s'"), arg);
 755                 } else if (!get_oidf(&oid, "%s^{commit}", arg)) {
 756                         string_list_append(&revs, oid_to_hex(&oid));
 757                 } else if (has_double_dash) {
 758                         die(_("'%s' does not appear to be a valid "
 759                               "revision"), arg);
 760                 } else {
 761                         break;
 762                 }
 763         }
 764         pathspec_pos = i;
 765
 766         /*
 767          * The user ran "git bisect start <sha1> <sha1>", hence did not
 768          * explicitly specify the terms, but we are already starting to
 769          * set references named with the default terms, and won't be able
 770          * to change afterwards.
 771          */
 772         if (revs.nr)
 773                 must_write_terms = 1;
 774         for (i = 0; i < revs.nr; i++) {
 775                 if (bad_seen) {
 776                         string_list_append(&states, terms->term_good);
 777                 } else {
 778                         bad_seen = 1;
 779                         string_list_append(&states, terms->term_bad);
 780                 }
 781         }
 782
 783         /*
 784          * Verify HEAD
 785          */
 786         head = refs_resolve_ref_unsafe(get_main_ref_store(the_repository),
 787                                        "HEAD", 0, &head_oid, &flags);
 788         if (!head)
 789                 if (repo_get_oid(the_repository, "HEAD", &head_oid))
 790                         return error(_("bad HEAD - I need a HEAD"));
 791
 792         /*
 793          * Check if we are bisecting
 794          */
 795         if (!is_empty_or_missing_file(git_path_bisect_start())) {
 796                 /* Reset to the rev from where we started */
 797                 strbuf_read_file(&start_head, git_path_bisect_start(), 0);
 798                 strbuf_trim(&start_head);
 799                 if (!no_checkout) {
 800                         struct child_process cmd = CHILD_PROCESS_INIT;
 801
 802                         cmd.git_cmd = 1;
 803                         strvec_pushl(&cmd.args, "checkout", start_head.buf,
 804                                      "--", NULL);
 805                         if (run_command(&cmd)) {
 806                                 res = error(_("checking out '%s' failed."
 807                                                  " Try 'git bisect start "
 808                                                  "<valid-branch>'."),
 809                                                start_head.buf);
 810                                 goto finish;
 811                         }
 812                 }
 813         } else {
 814                 /* Get the rev from where we start. */
 815                 if (!repo_get_oid(the_repository, head, &head_oid) &&
 816                     !starts_with(head, "refs/heads/")) {
 817                         strbuf_reset(&start_head);
 818                         strbuf_addstr(&start_head, oid_to_hex(&head_oid));
 819                 } else if (!repo_get_oid(the_repository, head, &head_oid) &&
 820                            skip_prefix(head, "refs/heads/", &head)) {
 821                         strbuf_addstr(&start_head, head);
 822                 } else {
 823                         return error(_("bad HEAD - strange symbolic ref"));
 824                 }
 825         }
 826
 827         /*
 828          * Get rid of any old bisect state.
 829          */
 830         if (bisect_clean_state())
 831                 return BISECT_FAILED;
 832
 833         /*
 834          * Write new start state
 835          */
 836         write_file(git_path_bisect_start(), "%s\n", start_head.buf);
 837
 838         if (first_parent_only)
 839                 write_file(git_path_bisect_first_parent(), "\n");
 840
 841         if (no_checkout) {
 842                 if (repo_get_oid(the_repository, start_head.buf, &oid) < 0) {
 843                         res = error(_("invalid ref: '%s'"), start_head.buf);
 844                         goto finish;
 845                 }
 846                 if (refs_update_ref(get_main_ref_store(the_repository), NULL, "BISECT_HEAD", &oid, NULL, 0,
 847                                     UPDATE_REFS_MSG_ON_ERR)) {
 848                         res = BISECT_FAILED;
 849                         goto finish;
 850                 }
 851         }
 852
 853         if (pathspec_pos < argc - 1)
 854                 sq_quote_argv(&bisect_names, argv + pathspec_pos);
 855         write_file(git_path_bisect_names(), "%s\n", bisect_names.buf);
 856
 857         for (i = 0; i < states.nr; i++)
 858                 if (bisect_write(states.items[i].string,
 859                                  revs.items[i].string, terms, 1)) {
 860                         res = BISECT_FAILED;
 861                         goto finish;
 862                 }
 863
 864         if (must_write_terms && write_terms(terms->term_bad,
 865                                             terms->term_good)) {
 866                 res = BISECT_FAILED;
 867                 goto finish;
 868         }
 869
 870         res = bisect_append_log_quoted(argv);
 871         if (res)
 872                 res = BISECT_FAILED;
 873
 874 finish:
 875         string_list_clear(&revs, 0);
 876         string_list_clear(&states, 0);
 877         strbuf_release(&start_head);
 878         strbuf_release(&bisect_names);
 879         if (res)
 880                 return res;
 881
 882         res = bisect_auto_next(terms, NULL);
 883         if (!is_bisect_success(res))
 884                 bisect_clean_state();
 885         return res;
 886 }
 887
 888 static inline int file_is_not_empty(const char *path)
 889 {
 890         return !is_empty_or_missing_file(path);
 891 }
 892
 893 static int bisect_autostart(struct bisect_terms *terms)
 894 {
 895         int res;
 896         const char *yesno;
 897
 898         if (file_is_not_empty(git_path_bisect_start()))
 899                 return 0;
 900
 901         fprintf_ln(stderr, _("You need to start by \"git bisect "
 902                           "start\"\n"));
 903
 904         if (!isatty(STDIN_FILENO))
 905                 return -1;
 906
 907         /*
 908          * TRANSLATORS: Make sure to include [Y] and [n] in your
 909          * translation. The program will only accept English input
 910          * at this point.
 911          */
 912         yesno = git_prompt(_("Do you want me to do it for you "
 913                              "[Y/n]? "), PROMPT_ECHO);
 914         res = tolower(*yesno) == 'n' ?
 915                 -1 : bisect_start(terms, 0, empty_strvec);
 916
 917         return res;
 918 }
 919
 920 static enum bisect_error bisect_state(struct bisect_terms *terms, int argc,
 921                                       const char **argv)
 922 {
 923         const char *state;
 924         int i, verify_expected = 1;
 925         struct object_id oid, expected;
 926         struct oid_array revs = OID_ARRAY_INIT;
 927
 928         if (!argc)
 929                 return error(_("Please call `--bisect-state` with at least one argument"));
 930
 931         if (bisect_autostart(terms))
 932                 return BISECT_FAILED;
 933
 934         state = argv[0];
 935         if (check_and_set_terms(terms, state) ||
 936             !one_of(state, terms->term_good, terms->term_bad, "skip", NULL))
 937                 return BISECT_FAILED;
 938
 939         argv++;
 940         argc--;
 941         if (argc > 1 && !strcmp(state, terms->term_bad))
 942                 return error(_("'git bisect %s' can take only one argument."), terms->term_bad);
 943
 944         if (argc == 0) {
 945                 const char *head = "BISECT_HEAD";
 946                 enum get_oid_result res_head = repo_get_oid(the_repository,
 947                                                             head, &oid);
 948
 949                 if (res_head == MISSING_OBJECT) {
 950                         head = "HEAD";
 951                         res_head = repo_get_oid(the_repository, head, &oid);
 952                 }
 953
 954                 if (res_head)
 955                         error(_("Bad rev input: %s"), head);
 956                 oid_array_append(&revs, &oid);
 957         }
 958
 959         /*
 960          * All input revs must be checked before executing bisect_write()
 961          * to discard junk revs.
 962          */
 963
 964         for (; argc; argc--, argv++) {
 965                 struct commit *commit;
 966
 967                 if (repo_get_oid(the_repository, *argv, &oid)){
 968                         error(_("Bad rev input: %s"), *argv);
 969                         oid_array_clear(&revs);
 970                         return BISECT_FAILED;
 971                 }
 972
 973                 commit = lookup_commit_reference(the_repository, &oid);
 974                 if (!commit)
 975                         die(_("Bad rev input (not a commit): %s"), *argv);
 976
 977                 oid_array_append(&revs, &commit->object.oid);
 978         }
 979
 980         if (refs_read_ref(get_main_ref_store(the_repository), "BISECT_EXPECTED_REV", &expected))
 981                 verify_expected = 0; /* Ignore invalid file contents */
 982
 983         for (i = 0; i < revs.nr; i++) {
 984                 if (bisect_write(state, oid_to_hex(&revs.oid[i]), terms, 0)) {
 985                         oid_array_clear(&revs);
 986                         return BISECT_FAILED;
 987                 }
 988                 if (verify_expected && !oideq(&revs.oid[i], &expected)) {
 989                         unlink_or_warn(git_path_bisect_ancestors_ok());
 990                         refs_delete_ref(get_main_ref_store(the_repository),
 991                                         NULL, "BISECT_EXPECTED_REV", NULL,
 992                                         REF_NO_DEREF);
 993                         verify_expected = 0;
 994                 }
 995         }
 996
 997         oid_array_clear(&revs);
 998         return bisect_auto_next(terms, NULL);
 999 }
1000
1001 static enum bisect_error bisect_log(void)
1002 {
1003         int fd, status;
1004         const char* filename = git_path_bisect_log();
1005
1006         if (is_empty_or_missing_file(filename))
1007                 return error(_("We are not bisecting."));
1008
1009         fd = open(filename, O_RDONLY);
1010         if (fd < 0)
1011                 return BISECT_FAILED;
1012
1013         status = copy_fd(fd, STDOUT_FILENO);
1014         close(fd);
1015         return status ? BISECT_FAILED : BISECT_OK;
1016 }
1017
1018 static int process_replay_line(struct bisect_terms *terms, struct strbuf *line)
1019 {
1020         const char *p = line->buf + strspn(line->buf, " \t");
1021         char *word_end, *rev;
1022
1023         if ((!skip_prefix(p, "git bisect", &p) &&
1024         !skip_prefix(p, "git-bisect", &p)) || !isspace(*p))
1025                 return 0;
1026         p += strspn(p, " \t");
1027
1028         word_end = (char *)p + strcspn(p, " \t");
1029         rev = word_end + strspn(word_end, " \t");
1030         *word_end = '\0'; /* NUL-terminate the word */
1031
1032         get_terms(terms);
1033         if (check_and_set_terms(terms, p))
1034                 return -1;
1035
1036         if (!strcmp(p, "start")) {
1037                 struct strvec argv = STRVEC_INIT;
1038                 int res;
1039                 sq_dequote_to_strvec(rev, &argv);
1040                 res = bisect_start(terms, argv.nr, argv.v);
1041                 strvec_clear(&argv);
1042                 return res;
1043         }
1044
1045         if (one_of(p, terms->term_good,
1046            terms->term_bad, "skip", NULL))
1047                 return bisect_write(p, rev, terms, 0);
1048
1049         if (!strcmp(p, "terms")) {
1050                 struct strvec argv = STRVEC_INIT;
1051                 int res;
1052                 sq_dequote_to_strvec(rev, &argv);
1053                 res = bisect_terms(terms, argv.nr == 1 ? argv.v[0] : NULL);
1054                 strvec_clear(&argv);
1055                 return res;
1056         }
1057         error(_("'%s'?? what are you talking about?"), p);
1058
1059         return -1;
1060 }
1061
1062 static enum bisect_error bisect_replay(struct bisect_terms *terms, const char *filename)
1063 {
1064         FILE *fp = NULL;
1065         enum bisect_error res = BISECT_OK;
1066         struct strbuf line = STRBUF_INIT;
1067
1068         if (is_empty_or_missing_file(filename))
1069                 return error(_("cannot read file '%s' for replaying"), filename);
1070
1071         if (bisect_reset(NULL))
1072                 return BISECT_FAILED;
1073
1074         fp = fopen(filename, "r");
1075         if (!fp)
1076                 return BISECT_FAILED;
1077
1078         while ((strbuf_getline(&line, fp) != EOF) && !res)
1079                 res = process_replay_line(terms, &line);
1080
1081         strbuf_release(&line);
1082         fclose(fp);
1083
1084         if (res)
1085                 return BISECT_FAILED;
1086
1087         return bisect_auto_next(terms, NULL);
1088 }
1089
1090 static enum bisect_error bisect_skip(struct bisect_terms *terms, int argc,
1091                                      const char **argv)
1092 {
1093         int i;
1094         enum bisect_error res;
1095         struct strvec argv_state = STRVEC_INIT;
1096
1097         strvec_push(&argv_state, "skip");
1098
1099         for (i = 0; i < argc; i++) {
1100                 const char *dotdot = strstr(argv[i], "..");
1101
1102                 if (dotdot) {
1103                         struct rev_info revs;
1104                         struct commit *commit;
1105
1106                         repo_init_revisions(the_repository, &revs, NULL);
1107                         setup_revisions(2, argv + i - 1, &revs, NULL);
1108
1109                         if (prepare_revision_walk(&revs))
1110                                 die(_("revision walk setup failed\n"));
1111                         while ((commit = get_revision(&revs)) != NULL)
1112                                 strvec_push(&argv_state,
1113                                                 oid_to_hex(&commit->object.oid));
1114
1115                         reset_revision_walk();
1116                         release_revisions(&revs);
1117                 } else {
1118                         strvec_push(&argv_state, argv[i]);
1119                 }
1120         }
1121         res = bisect_state(terms, argv_state.nr, argv_state.v);
1122
1123         strvec_clear(&argv_state);
1124         return res;
1125 }
1126
1127 static int bisect_visualize(struct bisect_terms *terms, int argc,
1128                             const char **argv)
1129 {
1130         struct child_process cmd = CHILD_PROCESS_INIT;
1131         struct strbuf sb = STRBUF_INIT;
1132
1133         if (bisect_next_check(terms, NULL) != 0)
1134                 return BISECT_FAILED;
1135
1136         cmd.no_stdin = 1;
1137         if (!argc) {
1138                 if ((getenv("DISPLAY") || getenv("SESSIONNAME") || getenv("MSYSTEM") ||
1139                      getenv("SECURITYSESSIONID")) && exists_in_PATH("gitk")) {
1140                         strvec_push(&cmd.args, "gitk");
1141                 } else {
1142                         strvec_push(&cmd.args, "log");
1143                         cmd.git_cmd = 1;
1144                 }
1145         } else {
1146                 if (argv[0][0] == '-') {
1147                         strvec_push(&cmd.args, "log");
1148                         cmd.git_cmd = 1;
1149                 } else if (strcmp(argv[0], "tig") && !starts_with(argv[0], "git"))
1150                         cmd.git_cmd = 1;
1151
1152                 strvec_pushv(&cmd.args, argv);
1153         }
1154
1155         strvec_pushl(&cmd.args, "--bisect", "--", NULL);
1156
1157         strbuf_read_file(&sb, git_path_bisect_names(), 0);
1158         sq_dequote_to_strvec(sb.buf, &cmd.args);
1159         strbuf_release(&sb);
1160
1161         return run_command(&cmd);
1162 }
1163
1164 static int get_first_good(const char *refname UNUSED,
1165                           const struct object_id *oid,
1166                           int flag UNUSED, void *cb_data)
1167 {
1168         oidcpy(cb_data, oid);
1169         return 1;
1170 }
1171
1172 static int do_bisect_run(const char *command)
1173 {
1174         struct child_process cmd = CHILD_PROCESS_INIT;
1175
1176         printf(_("running %s\n"), command);
1177         cmd.use_shell = 1;
1178         strvec_push(&cmd.args, command);
1179         return run_command(&cmd);
1180 }
1181
1182 static int verify_good(const struct bisect_terms *terms, const char *command)
1183 {
1184         int rc;
1185         enum bisect_error res;
1186         struct object_id good_rev;
1187         struct object_id current_rev;
1188         char *good_glob = xstrfmt("%s-*", terms->term_good);
1189         int no_checkout = refs_ref_exists(get_main_ref_store(the_repository),
1190                                           "BISECT_HEAD");
1191
1192         refs_for_each_glob_ref_in(get_main_ref_store(the_repository),
1193                                   get_first_good, good_glob, "refs/bisect/",
1194                                   &good_rev);
1195         free(good_glob);
1196
1197         if (refs_read_ref(get_main_ref_store(the_repository), no_checkout ? "BISECT_HEAD" : "HEAD", &current_rev))
1198                 return -1;
1199
1200         res = bisect_checkout(&good_rev, no_checkout);
1201         if (res != BISECT_OK)
1202                 return -1;
1203
1204         rc = do_bisect_run(command);
1205
1206         res = bisect_checkout(&current_rev, no_checkout);
1207         if (res != BISECT_OK)
1208                 return -1;
1209
1210         return rc;
1211 }
1212
1213 static int bisect_run(struct bisect_terms *terms, int argc, const char **argv)
1214 {
1215         int res = BISECT_OK;
1216         struct strbuf command = STRBUF_INIT;
1217         const char *new_state;
1218         int temporary_stdout_fd, saved_stdout;
1219         int is_first_run = 1;
1220
1221         if (bisect_next_check(terms, NULL))
1222                 return BISECT_FAILED;
1223
1224         if (!argc) {
1225                 error(_("bisect run failed: no command provided."));
1226                 return BISECT_FAILED;
1227         }
1228
1229         sq_quote_argv(&command, argv);
1230         strbuf_ltrim(&command);
1231         while (1) {
1232                 res = do_bisect_run(command.buf);
1233
1234                 /*
1235                  * Exit code 126 and 127 can either come from the shell
1236                  * if it was unable to execute or even find the script,
1237                  * or from the script itself.  Check with a known-good
1238                  * revision to avoid trashing the bisect run due to a
1239                  * missing or non-executable script.
1240                  */
1241                 if (is_first_run && (res == 126 || res == 127)) {
1242                         int rc = verify_good(terms, command.buf);
1243                         is_first_run = 0;
1244                         if (rc < 0 || 128 <= rc) {
1245                                 error(_("unable to verify %s on good"
1246                                         " revision"), command.buf);
1247                                 res = BISECT_FAILED;
1248                                 break;
1249                         }
1250                         if (rc == res) {
1251                                 error(_("bogus exit code %d for good revision"),
1252                                       rc);
1253                                 res = BISECT_FAILED;
1254                                 break;
1255                         }
1256                 }
1257
1258                 if (res < 0 || 128 <= res) {
1259                         error(_("bisect run failed: exit code %d from"
1260                                 " %s is < 0 or >= 128"), res, command.buf);
1261                         break;
1262                 }
1263
1264                 if (res == 125)
1265                         new_state = "skip";
1266                 else if (!res)
1267                         new_state = terms->term_good;
1268                 else
1269                         new_state = terms->term_bad;
1270
1271                 temporary_stdout_fd = open(git_path_bisect_run(), O_CREAT | O_WRONLY | O_TRUNC, 0666);
1272
1273                 if (temporary_stdout_fd < 0) {
1274                         res = error_errno(_("cannot open file '%s' for writing"), git_path_bisect_run());
1275                         break;
1276                 }
1277
1278                 fflush(stdout);
1279                 saved_stdout = dup(1);
1280                 dup2(temporary_stdout_fd, 1);
1281
1282                 res = bisect_state(terms, 1, &new_state);
1283
1284                 fflush(stdout);
1285                 dup2(saved_stdout, 1);
1286                 close(saved_stdout);
1287                 close(temporary_stdout_fd);
1288
1289                 print_file_to_stdout(git_path_bisect_run());
1290
1291                 if (res == BISECT_ONLY_SKIPPED_LEFT)
1292                         error(_("bisect run cannot continue any more"));
1293                 else if (res == BISECT_INTERNAL_SUCCESS_MERGE_BASE) {
1294                         puts(_("bisect run success"));
1295                         res = BISECT_OK;
1296                 } else if (res == BISECT_INTERNAL_SUCCESS_1ST_BAD_FOUND) {
1297                         puts(_("bisect found first bad commit"));
1298                         res = BISECT_OK;
1299                 } else if (res) {
1300                         error(_("bisect run failed: 'git bisect %s'"
1301                                 " exited with error code %d"), new_state, res);
1302                 } else {
1303                         continue;
1304                 }
1305                 break;
1306         }
1307
1308         strbuf_release(&command);
1309         return res;
1310 }
1311
1312 static int cmd_bisect__reset(int argc, const char **argv, const char *prefix UNUSED)
1313 {
1314         if (argc > 1)
1315                 return error(_("'%s' requires either no argument or a commit"),
1316                              "git bisect reset");
1317         return bisect_reset(argc ? argv[0] : NULL);
1318 }
1319
1320 static int cmd_bisect__terms(int argc, const char **argv, const char *prefix UNUSED)
1321 {
1322         int res;
1323         struct bisect_terms terms = { 0 };
1324
1325         if (argc > 1)
1326                 return error(_("'%s' requires 0 or 1 argument"),
1327                              "git bisect terms");
1328         res = bisect_terms(&terms, argc == 1 ? argv[0] : NULL);
1329         free_terms(&terms);
1330         return res;
1331 }
1332
1333 static int cmd_bisect__start(int argc, const char **argv, const char *prefix UNUSED)
1334 {
1335         int res;
1336         struct bisect_terms terms = { 0 };
1337
1338         set_terms(&terms, "bad", "good");
1339         res = bisect_start(&terms, argc, argv);
1340         free_terms(&terms);
1341         return res;
1342 }
1343
1344 static int cmd_bisect__next(int argc, const char **argv UNUSED, const char *prefix)
1345 {
1346         int res;
1347         struct bisect_terms terms = { 0 };
1348
1349         if (argc)
1350                 return error(_("'%s' requires 0 arguments"),
1351                              "git bisect next");
1352         get_terms(&terms);
1353         res = bisect_next(&terms, prefix);
1354         free_terms(&terms);
1355         return res;
1356 }
1357
1358 static int cmd_bisect__log(int argc UNUSED, const char **argv UNUSED, const char *prefix UNUSED)
1359 {
1360         return bisect_log();
1361 }
1362
1363 static int cmd_bisect__replay(int argc, const char **argv, const char *prefix UNUSED)
1364 {
1365         int res;
1366         struct bisect_terms terms = { 0 };
1367
1368         if (argc != 1)
1369                 return error(_("no logfile given"));
1370         set_terms(&terms, "bad", "good");
1371         res = bisect_replay(&terms, argv[0]);
1372         free_terms(&terms);
1373         return res;
1374 }
1375
1376 static int cmd_bisect__skip(int argc, const char **argv, const char *prefix UNUSED)
1377 {
1378         int res;
1379         struct bisect_terms terms = { 0 };
1380
1381         set_terms(&terms, "bad", "good");
1382         get_terms(&terms);
1383         res = bisect_skip(&terms, argc, argv);
1384         free_terms(&terms);
1385         return res;
1386 }
1387
1388 static int cmd_bisect__visualize(int argc, const char **argv, const char *prefix UNUSED)
1389 {
1390         int res;
1391         struct bisect_terms terms = { 0 };
1392
1393         get_terms(&terms);
1394         res = bisect_visualize(&terms, argc, argv);
1395         free_terms(&terms);
1396         return res;
1397 }
1398
1399 static int cmd_bisect__run(int argc, const char **argv, const char *prefix UNUSED)
1400 {
1401         int res;
1402         struct bisect_terms terms = { 0 };
1403
1404         if (!argc)
1405                 return error(_("'%s' failed: no command provided."), "git bisect run");
1406         get_terms(&terms);
1407         res = bisect_run(&terms, argc, argv);
1408         free_terms(&terms);
1409         return res;
1410 }
1411
1412 int cmd_bisect(int argc, const char **argv, const char *prefix)
1413 {
1414         int res = 0;
1415         parse_opt_subcommand_fn *fn = NULL;
1416         struct option options[] = {
1417                 OPT_SUBCOMMAND("reset", &fn, cmd_bisect__reset),
1418                 OPT_SUBCOMMAND("terms", &fn, cmd_bisect__terms),
1419                 OPT_SUBCOMMAND("start", &fn, cmd_bisect__start),
1420                 OPT_SUBCOMMAND("next", &fn, cmd_bisect__next),
1421                 OPT_SUBCOMMAND("log", &fn, cmd_bisect__log),
1422                 OPT_SUBCOMMAND("replay", &fn, cmd_bisect__replay),
1423                 OPT_SUBCOMMAND("skip", &fn, cmd_bisect__skip),
1424                 OPT_SUBCOMMAND("visualize", &fn, cmd_bisect__visualize),
1425                 OPT_SUBCOMMAND("view", &fn, cmd_bisect__visualize),
1426                 OPT_SUBCOMMAND("run", &fn, cmd_bisect__run),
1427                 OPT_END()
1428         };
1429         argc = parse_options(argc, argv, prefix, options, git_bisect_usage,
1430                              PARSE_OPT_SUBCOMMAND_OPTIONAL);
1431
1432         if (!fn) {
1433                 struct bisect_terms terms = { 0 };
1434
1435                 if (!argc)
1436                         usage_msg_opt(_("need a command"), git_bisect_usage, options);
1437
1438                 set_terms(&terms, "bad", "good");
1439                 get_terms(&terms);
1440                 if (check_and_set_terms(&terms, argv[0]))
1441                         usage_msg_optf(_("unknown command: '%s'"), git_bisect_usage,
1442                                        options, argv[0]);
1443                 res = bisect_state(&terms, argc, argv);
1444                 free_terms(&terms);
1445         } else {
1446                 argc--;
1447                 argv++;
1448                 res = fn(argc, argv, prefix);
1449         }
1450
1451         return is_bisect_success(res) ? 0 : -res;
1452 }