Andrew's git / gitweb.git / builtin/grep.c
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builtin / grep.con commit diff: avoid redundantly clearing a flag (23b65f9)
   1/*
   2 * Builtin "git grep"
   3 *
   4 * Copyright (c) 2006 Junio C Hamano
   5 */
   6#include "cache.h"
   7#include "config.h"
   8#include "blob.h"
   9#include "tree.h"
  10#include "commit.h"
  11#include "tag.h"
  12#include "tree-walk.h"
  13#include "builtin.h"
  14#include "parse-options.h"
  15#include "string-list.h"
  16#include "run-command.h"
  17#include "userdiff.h"
  18#include "grep.h"
  19#include "quote.h"
  20#include "dir.h"
  21#include "pathspec.h"
  22#include "submodule.h"
  23#include "submodule-config.h"
  24
  25static char const * const grep_usage[] = {
  26        N_("git grep [<options>] [-e] <pattern> [<rev>...] [[--] <path>...]"),
  27        NULL
  28};
  29
  30static const char *super_prefix;
  31static int recurse_submodules;
  32static struct argv_array submodule_options = ARGV_ARRAY_INIT;
  33static const char *parent_basename;
  34
  35static int grep_submodule_launch(struct grep_opt *opt,
  36                                 const struct grep_source *gs);
  37
  38#define GREP_NUM_THREADS_DEFAULT 8
  39static int num_threads;
  40
  41#ifndef NO_PTHREADS
  42static pthread_t *threads;
  43
  44/* We use one producer thread and THREADS consumer
  45 * threads. The producer adds struct work_items to 'todo' and the
  46 * consumers pick work items from the same array.
  47 */
  48struct work_item {
  49        struct grep_source source;
  50        char done;
  51        struct strbuf out;
  52};
  53
  54/* In the range [todo_done, todo_start) in 'todo' we have work_items
  55 * that have been or are processed by a consumer thread. We haven't
  56 * written the result for these to stdout yet.
  57 *
  58 * The work_items in [todo_start, todo_end) are waiting to be picked
  59 * up by a consumer thread.
  60 *
  61 * The ranges are modulo TODO_SIZE.
  62 */
  63#define TODO_SIZE 128
  64static struct work_item todo[TODO_SIZE];
  65static int todo_start;
  66static int todo_end;
  67static int todo_done;
  68
  69/* Has all work items been added? */
  70static int all_work_added;
  71
  72/* This lock protects all the variables above. */
  73static pthread_mutex_t grep_mutex;
  74
  75static inline void grep_lock(void)
  76{
  77        assert(num_threads);
  78        pthread_mutex_lock(&grep_mutex);
  79}
  80
  81static inline void grep_unlock(void)
  82{
  83        assert(num_threads);
  84        pthread_mutex_unlock(&grep_mutex);
  85}
  86
  87/* Signalled when a new work_item is added to todo. */
  88static pthread_cond_t cond_add;
  89
  90/* Signalled when the result from one work_item is written to
  91 * stdout.
  92 */
  93static pthread_cond_t cond_write;
  94
  95/* Signalled when we are finished with everything. */
  96static pthread_cond_t cond_result;
  97
  98static int skip_first_line;
  99
 100static void add_work(struct grep_opt *opt, enum grep_source_type type,
 101                     const char *name, const char *path, const void *id)
 102{
 103        grep_lock();
 104
 105        while ((todo_end+1) % ARRAY_SIZE(todo) == todo_done) {
 106                pthread_cond_wait(&cond_write, &grep_mutex);
 107        }
 108
 109        grep_source_init(&todo[todo_end].source, type, name, path, id);
 110        if (opt->binary != GREP_BINARY_TEXT)
 111                grep_source_load_driver(&todo[todo_end].source);
 112        todo[todo_end].done = 0;
 113        strbuf_reset(&todo[todo_end].out);
 114        todo_end = (todo_end + 1) % ARRAY_SIZE(todo);
 115
 116        pthread_cond_signal(&cond_add);
 117        grep_unlock();
 118}
 119
 120static struct work_item *get_work(void)
 121{
 122        struct work_item *ret;
 123
 124        grep_lock();
 125        while (todo_start == todo_end && !all_work_added) {
 126                pthread_cond_wait(&cond_add, &grep_mutex);
 127        }
 128
 129        if (todo_start == todo_end && all_work_added) {
 130                ret = NULL;
 131        } else {
 132                ret = &todo[todo_start];
 133                todo_start = (todo_start + 1) % ARRAY_SIZE(todo);
 134        }
 135        grep_unlock();
 136        return ret;
 137}
 138
 139static void work_done(struct work_item *w)
 140{
 141        int old_done;
 142
 143        grep_lock();
 144        w->done = 1;
 145        old_done = todo_done;
 146        for(; todo[todo_done].done && todo_done != todo_start;
 147            todo_done = (todo_done+1) % ARRAY_SIZE(todo)) {
 148                w = &todo[todo_done];
 149                if (w->out.len) {
 150                        const char *p = w->out.buf;
 151                        size_t len = w->out.len;
 152
 153                        /* Skip the leading hunk mark of the first file. */
 154                        if (skip_first_line) {
 155                                while (len) {
 156                                        len--;
 157                                        if (*p++ == '\n')
 158                                                break;
 159                                }
 160                                skip_first_line = 0;
 161                        }
 162
 163                        write_or_die(1, p, len);
 164                }
 165                grep_source_clear(&w->source);
 166        }
 167
 168        if (old_done != todo_done)
 169                pthread_cond_signal(&cond_write);
 170
 171        if (all_work_added && todo_done == todo_end)
 172                pthread_cond_signal(&cond_result);
 173
 174        grep_unlock();
 175}
 176
 177static void *run(void *arg)
 178{
 179        int hit = 0;
 180        struct grep_opt *opt = arg;
 181
 182        while (1) {
 183                struct work_item *w = get_work();
 184                if (!w)
 185                        break;
 186
 187                opt->output_priv = w;
 188                if (w->source.type == GREP_SOURCE_SUBMODULE)
 189                        hit |= grep_submodule_launch(opt, &w->source);
 190                else
 191                        hit |= grep_source(opt, &w->source);
 192                grep_source_clear_data(&w->source);
 193                work_done(w);
 194        }
 195        free_grep_patterns(arg);
 196        free(arg);
 197
 198        return (void*) (intptr_t) hit;
 199}
 200
 201static void strbuf_out(struct grep_opt *opt, const void *buf, size_t size)
 202{
 203        struct work_item *w = opt->output_priv;
 204        strbuf_add(&w->out, buf, size);
 205}
 206
 207static void start_threads(struct grep_opt *opt)
 208{
 209        int i;
 210
 211        pthread_mutex_init(&grep_mutex, NULL);
 212        pthread_mutex_init(&grep_read_mutex, NULL);
 213        pthread_mutex_init(&grep_attr_mutex, NULL);
 214        pthread_cond_init(&cond_add, NULL);
 215        pthread_cond_init(&cond_write, NULL);
 216        pthread_cond_init(&cond_result, NULL);
 217        grep_use_locks = 1;
 218
 219        for (i = 0; i < ARRAY_SIZE(todo); i++) {
 220                strbuf_init(&todo[i].out, 0);
 221        }
 222
 223        threads = xcalloc(num_threads, sizeof(*threads));
 224        for (i = 0; i < num_threads; i++) {
 225                int err;
 226                struct grep_opt *o = grep_opt_dup(opt);
 227                o->output = strbuf_out;
 228                if (i)
 229                        o->debug = 0;
 230                compile_grep_patterns(o);
 231                err = pthread_create(&threads[i], NULL, run, o);
 232
 233                if (err)
 234                        die(_("grep: failed to create thread: %s"),
 235                            strerror(err));
 236        }
 237}
 238
 239static int wait_all(void)
 240{
 241        int hit = 0;
 242        int i;
 243
 244        grep_lock();
 245        all_work_added = 1;
 246
 247        /* Wait until all work is done. */
 248        while (todo_done != todo_end)
 249                pthread_cond_wait(&cond_result, &grep_mutex);
 250
 251        /* Wake up all the consumer threads so they can see that there
 252         * is no more work to do.
 253         */
 254        pthread_cond_broadcast(&cond_add);
 255        grep_unlock();
 256
 257        for (i = 0; i < num_threads; i++) {
 258                void *h;
 259                pthread_join(threads[i], &h);
 260                hit |= (int) (intptr_t) h;
 261        }
 262
 263        free(threads);
 264
 265        pthread_mutex_destroy(&grep_mutex);
 266        pthread_mutex_destroy(&grep_read_mutex);
 267        pthread_mutex_destroy(&grep_attr_mutex);
 268        pthread_cond_destroy(&cond_add);
 269        pthread_cond_destroy(&cond_write);
 270        pthread_cond_destroy(&cond_result);
 271        grep_use_locks = 0;
 272
 273        return hit;
 274}
 275#else /* !NO_PTHREADS */
 276
 277static int wait_all(void)
 278{
 279        return 0;
 280}
 281#endif
 282
 283static int grep_cmd_config(const char *var, const char *value, void *cb)
 284{
 285        int st = grep_config(var, value, cb);
 286        if (git_color_default_config(var, value, cb) < 0)
 287                st = -1;
 288
 289        if (!strcmp(var, "grep.threads")) {
 290                num_threads = git_config_int(var, value);
 291                if (num_threads < 0)
 292                        die(_("invalid number of threads specified (%d) for %s"),
 293                            num_threads, var);
 294#ifdef NO_PTHREADS
 295                else if (num_threads && num_threads != 1) {
 296                        /*
 297                         * TRANSLATORS: %s is the configuration
 298                         * variable for tweaking threads, currently
 299                         * grep.threads
 300                         */
 301                        warning(_("no threads support, ignoring %s"), var);
 302                        num_threads = 0;
 303                }
 304#endif
 305        }
 306
 307        if (!strcmp(var, "submodule.recurse"))
 308                recurse_submodules = git_config_bool(var, value);
 309
 310        return st;
 311}
 312
 313static void *lock_and_read_oid_file(const struct object_id *oid, enum object_type *type, unsigned long *size)
 314{
 315        void *data;
 316
 317        grep_read_lock();
 318        data = read_sha1_file(oid->hash, type, size);
 319        grep_read_unlock();
 320        return data;
 321}
 322
 323static int grep_oid(struct grep_opt *opt, const struct object_id *oid,
 324                     const char *filename, int tree_name_len,
 325                     const char *path)
 326{
 327        struct strbuf pathbuf = STRBUF_INIT;
 328
 329        if (super_prefix) {
 330                strbuf_add(&pathbuf, filename, tree_name_len);
 331                strbuf_addstr(&pathbuf, super_prefix);
 332                strbuf_addstr(&pathbuf, filename + tree_name_len);
 333        } else {
 334                strbuf_addstr(&pathbuf, filename);
 335        }
 336
 337        if (opt->relative && opt->prefix_length) {
 338                char *name = strbuf_detach(&pathbuf, NULL);
 339                quote_path_relative(name + tree_name_len, opt->prefix, &pathbuf);
 340                strbuf_insert(&pathbuf, 0, name, tree_name_len);
 341                free(name);
 342        }
 343
 344#ifndef NO_PTHREADS
 345        if (num_threads) {
 346                add_work(opt, GREP_SOURCE_OID, pathbuf.buf, path, oid);
 347                strbuf_release(&pathbuf);
 348                return 0;
 349        } else
 350#endif
 351        {
 352                struct grep_source gs;
 353                int hit;
 354
 355                grep_source_init(&gs, GREP_SOURCE_OID, pathbuf.buf, path, oid);
 356                strbuf_release(&pathbuf);
 357                hit = grep_source(opt, &gs);
 358
 359                grep_source_clear(&gs);
 360                return hit;
 361        }
 362}
 363
 364static int grep_file(struct grep_opt *opt, const char *filename)
 365{
 366        struct strbuf buf = STRBUF_INIT;
 367
 368        if (super_prefix)
 369                strbuf_addstr(&buf, super_prefix);
 370        strbuf_addstr(&buf, filename);
 371
 372        if (opt->relative && opt->prefix_length) {
 373                char *name = strbuf_detach(&buf, NULL);
 374                quote_path_relative(name, opt->prefix, &buf);
 375                free(name);
 376        }
 377
 378#ifndef NO_PTHREADS
 379        if (num_threads) {
 380                add_work(opt, GREP_SOURCE_FILE, buf.buf, filename, filename);
 381                strbuf_release(&buf);
 382                return 0;
 383        } else
 384#endif
 385        {
 386                struct grep_source gs;
 387                int hit;
 388
 389                grep_source_init(&gs, GREP_SOURCE_FILE, buf.buf, filename, filename);
 390                strbuf_release(&buf);
 391                hit = grep_source(opt, &gs);
 392
 393                grep_source_clear(&gs);
 394                return hit;
 395        }
 396}
 397
 398static void append_path(struct grep_opt *opt, const void *data, size_t len)
 399{
 400        struct string_list *path_list = opt->output_priv;
 401
 402        if (len == 1 && *(const char *)data == '\0')
 403                return;
 404        string_list_append(path_list, xstrndup(data, len));
 405}
 406
 407static void run_pager(struct grep_opt *opt, const char *prefix)
 408{
 409        struct string_list *path_list = opt->output_priv;
 410        struct child_process child = CHILD_PROCESS_INIT;
 411        int i, status;
 412
 413        for (i = 0; i < path_list->nr; i++)
 414                argv_array_push(&child.args, path_list->items[i].string);
 415        child.dir = prefix;
 416        child.use_shell = 1;
 417
 418        status = run_command(&child);
 419        if (status)
 420                exit(status);
 421}
 422
 423static void compile_submodule_options(const struct grep_opt *opt,
 424                                      const char **argv,
 425                                      int cached, int untracked,
 426                                      int opt_exclude, int use_index,
 427                                      int pattern_type_arg)
 428{
 429        struct grep_pat *pattern;
 430
 431        if (recurse_submodules)
 432                argv_array_push(&submodule_options, "--recurse-submodules");
 433
 434        if (cached)
 435                argv_array_push(&submodule_options, "--cached");
 436        if (!use_index)
 437                argv_array_push(&submodule_options, "--no-index");
 438        if (untracked)
 439                argv_array_push(&submodule_options, "--untracked");
 440        if (opt_exclude > 0)
 441                argv_array_push(&submodule_options, "--exclude-standard");
 442
 443        if (opt->invert)
 444                argv_array_push(&submodule_options, "-v");
 445        if (opt->ignore_case)
 446                argv_array_push(&submodule_options, "-i");
 447        if (opt->word_regexp)
 448                argv_array_push(&submodule_options, "-w");
 449        switch (opt->binary) {
 450        case GREP_BINARY_NOMATCH:
 451                argv_array_push(&submodule_options, "-I");
 452                break;
 453        case GREP_BINARY_TEXT:
 454                argv_array_push(&submodule_options, "-a");
 455                break;
 456        default:
 457                break;
 458        }
 459        if (opt->allow_textconv)
 460                argv_array_push(&submodule_options, "--textconv");
 461        if (opt->max_depth != -1)
 462                argv_array_pushf(&submodule_options, "--max-depth=%d",
 463                                 opt->max_depth);
 464        if (opt->linenum)
 465                argv_array_push(&submodule_options, "-n");
 466        if (!opt->pathname)
 467                argv_array_push(&submodule_options, "-h");
 468        if (!opt->relative)
 469                argv_array_push(&submodule_options, "--full-name");
 470        if (opt->name_only)
 471                argv_array_push(&submodule_options, "-l");
 472        if (opt->unmatch_name_only)
 473                argv_array_push(&submodule_options, "-L");
 474        if (opt->null_following_name)
 475                argv_array_push(&submodule_options, "-z");
 476        if (opt->count)
 477                argv_array_push(&submodule_options, "-c");
 478        if (opt->file_break)
 479                argv_array_push(&submodule_options, "--break");
 480        if (opt->heading)
 481                argv_array_push(&submodule_options, "--heading");
 482        if (opt->pre_context)
 483                argv_array_pushf(&submodule_options, "--before-context=%d",
 484                                 opt->pre_context);
 485        if (opt->post_context)
 486                argv_array_pushf(&submodule_options, "--after-context=%d",
 487                                 opt->post_context);
 488        if (opt->funcname)
 489                argv_array_push(&submodule_options, "-p");
 490        if (opt->funcbody)
 491                argv_array_push(&submodule_options, "-W");
 492        if (opt->all_match)
 493                argv_array_push(&submodule_options, "--all-match");
 494        if (opt->debug)
 495                argv_array_push(&submodule_options, "--debug");
 496        if (opt->status_only)
 497                argv_array_push(&submodule_options, "-q");
 498
 499        switch (pattern_type_arg) {
 500        case GREP_PATTERN_TYPE_BRE:
 501                argv_array_push(&submodule_options, "-G");
 502                break;
 503        case GREP_PATTERN_TYPE_ERE:
 504                argv_array_push(&submodule_options, "-E");
 505                break;
 506        case GREP_PATTERN_TYPE_FIXED:
 507                argv_array_push(&submodule_options, "-F");
 508                break;
 509        case GREP_PATTERN_TYPE_PCRE:
 510                argv_array_push(&submodule_options, "-P");
 511                break;
 512        case GREP_PATTERN_TYPE_UNSPECIFIED:
 513                break;
 514        default:
 515                die("BUG: Added a new grep pattern type without updating switch statement");
 516        }
 517
 518        for (pattern = opt->pattern_list; pattern != NULL;
 519             pattern = pattern->next) {
 520                switch (pattern->token) {
 521                case GREP_PATTERN:
 522                        argv_array_pushf(&submodule_options, "-e%s",
 523                                         pattern->pattern);
 524                        break;
 525                case GREP_AND:
 526                case GREP_OPEN_PAREN:
 527                case GREP_CLOSE_PAREN:
 528                case GREP_NOT:
 529                case GREP_OR:
 530                        argv_array_push(&submodule_options, pattern->pattern);
 531                        break;
 532                /* BODY and HEAD are not used by git-grep */
 533                case GREP_PATTERN_BODY:
 534                case GREP_PATTERN_HEAD:
 535                        break;
 536                }
 537        }
 538
 539        /*
 540         * Limit number of threads for child process to use.
 541         * This is to prevent potential fork-bomb behavior of git-grep as each
 542         * submodule process has its own thread pool.
 543         */
 544        argv_array_pushf(&submodule_options, "--threads=%d",
 545                         (num_threads + 1) / 2);
 546
 547        /* Add Pathspecs */
 548        argv_array_push(&submodule_options, "--");
 549        for (; *argv; argv++)
 550                argv_array_push(&submodule_options, *argv);
 551}
 552
 553/*
 554 * Launch child process to grep contents of a submodule
 555 */
 556static int grep_submodule_launch(struct grep_opt *opt,
 557                                 const struct grep_source *gs)
 558{
 559        struct child_process cp = CHILD_PROCESS_INIT;
 560        int status, i;
 561        const char *end_of_base;
 562        const char *name;
 563        struct strbuf child_output = STRBUF_INIT;
 564
 565        end_of_base = strchr(gs->name, ':');
 566        if (gs->identifier && end_of_base)
 567                name = end_of_base + 1;
 568        else
 569                name = gs->name;
 570
 571        prepare_submodule_repo_env(&cp.env_array);
 572        argv_array_push(&cp.env_array, GIT_DIR_ENVIRONMENT);
 573
 574        if (opt->relative && opt->prefix_length)
 575                argv_array_pushf(&cp.env_array, "%s=%s",
 576                                 GIT_TOPLEVEL_PREFIX_ENVIRONMENT,
 577                                 opt->prefix);
 578
 579        /* Add super prefix */
 580        argv_array_pushf(&cp.args, "--super-prefix=%s%s/",
 581                         super_prefix ? super_prefix : "",
 582                         name);
 583        argv_array_push(&cp.args, "grep");
 584
 585        /*
 586         * Add basename of parent project
 587         * When performing grep on a tree object the filename is prefixed
 588         * with the object's name: 'tree-name:filename'.  In order to
 589         * provide uniformity of output we want to pass the name of the
 590         * parent project's object name to the submodule so the submodule can
 591         * prefix its output with the parent's name and not its own OID.
 592         */
 593        if (gs->identifier && end_of_base)
 594                argv_array_pushf(&cp.args, "--parent-basename=%.*s",
 595                                 (int) (end_of_base - gs->name),
 596                                 gs->name);
 597
 598        /* Add options */
 599        for (i = 0; i < submodule_options.argc; i++) {
 600                /*
 601                 * If there is a tree identifier for the submodule, add the
 602                 * rev after adding the submodule options but before the
 603                 * pathspecs.  To do this we listen for the '--' and insert the
 604                 * oid before pushing the '--' onto the child process argv
 605                 * array.
 606                 */
 607                if (gs->identifier &&
 608                    !strcmp("--", submodule_options.argv[i])) {
 609                        argv_array_push(&cp.args, oid_to_hex(gs->identifier));
 610                }
 611
 612                argv_array_push(&cp.args, submodule_options.argv[i]);
 613        }
 614
 615        cp.git_cmd = 1;
 616        cp.dir = gs->path;
 617
 618        /*
 619         * Capture output to output buffer and check the return code from the
 620         * child process.  A '0' indicates a hit, a '1' indicates no hit and
 621         * anything else is an error.
 622         */
 623        status = capture_command(&cp, &child_output, 0);
 624        if (status && (status != 1)) {
 625                /* flush the buffer */
 626                write_or_die(1, child_output.buf, child_output.len);
 627                die("process for submodule '%s' failed with exit code: %d",
 628                    gs->name, status);
 629        }
 630
 631        opt->output(opt, child_output.buf, child_output.len);
 632        strbuf_release(&child_output);
 633        /* invert the return code to make a hit equal to 1 */
 634        return !status;
 635}
 636
 637/*
 638 * Prep grep structures for a submodule grep
 639 * oid: the oid of the submodule or NULL if using the working tree
 640 * filename: name of the submodule including tree name of parent
 641 * path: location of the submodule
 642 */
 643static int grep_submodule(struct grep_opt *opt, const struct object_id *oid,
 644                          const char *filename, const char *path)
 645{
 646        if (!is_submodule_initialized(path))
 647                return 0;
 648        if (!is_submodule_populated_gently(path, NULL)) {
 649                /*
 650                 * If searching history, check for the presense of the
 651                 * submodule's gitdir before skipping the submodule.
 652                 */
 653                if (oid) {
 654                        const struct submodule *sub =
 655                                        submodule_from_path(null_sha1, path);
 656                        if (sub)
 657                                path = git_path("modules/%s", sub->name);
 658
 659                        if (!(is_directory(path) && is_git_directory(path)))
 660                                return 0;
 661                } else {
 662                        return 0;
 663                }
 664        }
 665
 666#ifndef NO_PTHREADS
 667        if (num_threads) {
 668                add_work(opt, GREP_SOURCE_SUBMODULE, filename, path, oid);
 669                return 0;
 670        } else
 671#endif
 672        {
 673                struct grep_source gs;
 674                int hit;
 675
 676                grep_source_init(&gs, GREP_SOURCE_SUBMODULE,
 677                                 filename, path, oid);
 678                hit = grep_submodule_launch(opt, &gs);
 679
 680                grep_source_clear(&gs);
 681                return hit;
 682        }
 683}
 684
 685static int grep_cache(struct grep_opt *opt, const struct pathspec *pathspec,
 686                      int cached)
 687{
 688        int hit = 0;
 689        int nr;
 690        struct strbuf name = STRBUF_INIT;
 691        int name_base_len = 0;
 692        if (super_prefix) {
 693                name_base_len = strlen(super_prefix);
 694                strbuf_addstr(&name, super_prefix);
 695        }
 696
 697        read_cache();
 698
 699        for (nr = 0; nr < active_nr; nr++) {
 700                const struct cache_entry *ce = active_cache[nr];
 701                strbuf_setlen(&name, name_base_len);
 702                strbuf_addstr(&name, ce->name);
 703
 704                if (S_ISREG(ce->ce_mode) &&
 705                    match_pathspec(pathspec, name.buf, name.len, 0, NULL,
 706                                   S_ISDIR(ce->ce_mode) ||
 707                                   S_ISGITLINK(ce->ce_mode))) {
 708                        /*
 709                         * If CE_VALID is on, we assume worktree file and its
 710                         * cache entry are identical, even if worktree file has
 711                         * been modified, so use cache version instead
 712                         */
 713                        if (cached || (ce->ce_flags & CE_VALID) ||
 714                            ce_skip_worktree(ce)) {
 715                                if (ce_stage(ce) || ce_intent_to_add(ce))
 716                                        continue;
 717                                hit |= grep_oid(opt, &ce->oid, ce->name,
 718                                                 0, ce->name);
 719                        } else {
 720                                hit |= grep_file(opt, ce->name);
 721                        }
 722                } else if (recurse_submodules && S_ISGITLINK(ce->ce_mode) &&
 723                           submodule_path_match(pathspec, name.buf, NULL)) {
 724                        hit |= grep_submodule(opt, NULL, ce->name, ce->name);
 725                } else {
 726                        continue;
 727                }
 728
 729                if (ce_stage(ce)) {
 730                        do {
 731                                nr++;
 732                        } while (nr < active_nr &&
 733                                 !strcmp(ce->name, active_cache[nr]->name));
 734                        nr--; /* compensate for loop control */
 735                }
 736                if (hit && opt->status_only)
 737                        break;
 738        }
 739
 740        strbuf_release(&name);
 741        return hit;
 742}
 743
 744static int grep_tree(struct grep_opt *opt, const struct pathspec *pathspec,
 745                     struct tree_desc *tree, struct strbuf *base, int tn_len,
 746                     int check_attr)
 747{
 748        int hit = 0;
 749        enum interesting match = entry_not_interesting;
 750        struct name_entry entry;
 751        int old_baselen = base->len;
 752        struct strbuf name = STRBUF_INIT;
 753        int name_base_len = 0;
 754        if (super_prefix) {
 755                strbuf_addstr(&name, super_prefix);
 756                name_base_len = name.len;
 757        }
 758
 759        while (tree_entry(tree, &entry)) {
 760                int te_len = tree_entry_len(&entry);
 761
 762                if (match != all_entries_interesting) {
 763                        strbuf_addstr(&name, base->buf + tn_len);
 764                        match = tree_entry_interesting(&entry, &name,
 765                                                       0, pathspec);
 766                        strbuf_setlen(&name, name_base_len);
 767
 768                        if (match == all_entries_not_interesting)
 769                                break;
 770                        if (match == entry_not_interesting)
 771                                continue;
 772                }
 773
 774                strbuf_add(base, entry.path, te_len);
 775
 776                if (S_ISREG(entry.mode)) {
 777                        hit |= grep_oid(opt, entry.oid, base->buf, tn_len,
 778                                         check_attr ? base->buf + tn_len : NULL);
 779                } else if (S_ISDIR(entry.mode)) {
 780                        enum object_type type;
 781                        struct tree_desc sub;
 782                        void *data;
 783                        unsigned long size;
 784
 785                        data = lock_and_read_oid_file(entry.oid, &type, &size);
 786                        if (!data)
 787                                die(_("unable to read tree (%s)"),
 788                                    oid_to_hex(entry.oid));
 789
 790                        strbuf_addch(base, '/');
 791                        init_tree_desc(&sub, data, size);
 792                        hit |= grep_tree(opt, pathspec, &sub, base, tn_len,
 793                                         check_attr);
 794                        free(data);
 795                } else if (recurse_submodules && S_ISGITLINK(entry.mode)) {
 796                        hit |= grep_submodule(opt, entry.oid, base->buf,
 797                                              base->buf + tn_len);
 798                }
 799
 800                strbuf_setlen(base, old_baselen);
 801
 802                if (hit && opt->status_only)
 803                        break;
 804        }
 805
 806        strbuf_release(&name);
 807        return hit;
 808}
 809
 810static int grep_object(struct grep_opt *opt, const struct pathspec *pathspec,
 811                       struct object *obj, const char *name, const char *path)
 812{
 813        if (obj->type == OBJ_BLOB)
 814                return grep_oid(opt, &obj->oid, name, 0, path);
 815        if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) {
 816                struct tree_desc tree;
 817                void *data;
 818                unsigned long size;
 819                struct strbuf base;
 820                int hit, len;
 821
 822                grep_read_lock();
 823                data = read_object_with_reference(obj->oid.hash, tree_type,
 824                                                  &size, NULL);
 825                grep_read_unlock();
 826
 827                if (!data)
 828                        die(_("unable to read tree (%s)"), oid_to_hex(&obj->oid));
 829
 830                /* Use parent's name as base when recursing submodules */
 831                if (recurse_submodules && parent_basename)
 832                        name = parent_basename;
 833
 834                len = name ? strlen(name) : 0;
 835                strbuf_init(&base, PATH_MAX + len + 1);
 836                if (len) {
 837                        strbuf_add(&base, name, len);
 838                        strbuf_addch(&base, ':');
 839                }
 840                init_tree_desc(&tree, data, size);
 841                hit = grep_tree(opt, pathspec, &tree, &base, base.len,
 842                                obj->type == OBJ_COMMIT);
 843                strbuf_release(&base);
 844                free(data);
 845                return hit;
 846        }
 847        die(_("unable to grep from object of type %s"), typename(obj->type));
 848}
 849
 850static int grep_objects(struct grep_opt *opt, const struct pathspec *pathspec,
 851                        const struct object_array *list)
 852{
 853        unsigned int i;
 854        int hit = 0;
 855        const unsigned int nr = list->nr;
 856
 857        for (i = 0; i < nr; i++) {
 858                struct object *real_obj;
 859                real_obj = deref_tag(list->objects[i].item, NULL, 0);
 860
 861                /* load the gitmodules file for this rev */
 862                if (recurse_submodules) {
 863                        submodule_free();
 864                        gitmodules_config_sha1(real_obj->oid.hash);
 865                }
 866                if (grep_object(opt, pathspec, real_obj, list->objects[i].name, list->objects[i].path)) {
 867                        hit = 1;
 868                        if (opt->status_only)
 869                                break;
 870                }
 871        }
 872        return hit;
 873}
 874
 875static int grep_directory(struct grep_opt *opt, const struct pathspec *pathspec,
 876                          int exc_std, int use_index)
 877{
 878        struct dir_struct dir;
 879        int i, hit = 0;
 880
 881        memset(&dir, 0, sizeof(dir));
 882        if (!use_index)
 883                dir.flags |= DIR_NO_GITLINKS;
 884        if (exc_std)
 885                setup_standard_excludes(&dir);
 886
 887        fill_directory(&dir, &the_index, pathspec);
 888        for (i = 0; i < dir.nr; i++) {
 889                if (!dir_path_match(dir.entries[i], pathspec, 0, NULL))
 890                        continue;
 891                hit |= grep_file(opt, dir.entries[i]->name);
 892                if (hit && opt->status_only)
 893                        break;
 894        }
 895        return hit;
 896}
 897
 898static int context_callback(const struct option *opt, const char *arg,
 899                            int unset)
 900{
 901        struct grep_opt *grep_opt = opt->value;
 902        int value;
 903        const char *endp;
 904
 905        if (unset) {
 906                grep_opt->pre_context = grep_opt->post_context = 0;
 907                return 0;
 908        }
 909        value = strtol(arg, (char **)&endp, 10);
 910        if (*endp) {
 911                return error(_("switch `%c' expects a numerical value"),
 912                             opt->short_name);
 913        }
 914        grep_opt->pre_context = grep_opt->post_context = value;
 915        return 0;
 916}
 917
 918static int file_callback(const struct option *opt, const char *arg, int unset)
 919{
 920        struct grep_opt *grep_opt = opt->value;
 921        int from_stdin = !strcmp(arg, "-");
 922        FILE *patterns;
 923        int lno = 0;
 924        struct strbuf sb = STRBUF_INIT;
 925
 926        patterns = from_stdin ? stdin : fopen(arg, "r");
 927        if (!patterns)
 928                die_errno(_("cannot open '%s'"), arg);
 929        while (strbuf_getline(&sb, patterns) == 0) {
 930                /* ignore empty line like grep does */
 931                if (sb.len == 0)
 932                        continue;
 933
 934                append_grep_pat(grep_opt, sb.buf, sb.len, arg, ++lno,
 935                                GREP_PATTERN);
 936        }
 937        if (!from_stdin)
 938                fclose(patterns);
 939        strbuf_release(&sb);
 940        return 0;
 941}
 942
 943static int not_callback(const struct option *opt, const char *arg, int unset)
 944{
 945        struct grep_opt *grep_opt = opt->value;
 946        append_grep_pattern(grep_opt, "--not", "command line", 0, GREP_NOT);
 947        return 0;
 948}
 949
 950static int and_callback(const struct option *opt, const char *arg, int unset)
 951{
 952        struct grep_opt *grep_opt = opt->value;
 953        append_grep_pattern(grep_opt, "--and", "command line", 0, GREP_AND);
 954        return 0;
 955}
 956
 957static int open_callback(const struct option *opt, const char *arg, int unset)
 958{
 959        struct grep_opt *grep_opt = opt->value;
 960        append_grep_pattern(grep_opt, "(", "command line", 0, GREP_OPEN_PAREN);
 961        return 0;
 962}
 963
 964static int close_callback(const struct option *opt, const char *arg, int unset)
 965{
 966        struct grep_opt *grep_opt = opt->value;
 967        append_grep_pattern(grep_opt, ")", "command line", 0, GREP_CLOSE_PAREN);
 968        return 0;
 969}
 970
 971static int pattern_callback(const struct option *opt, const char *arg,
 972                            int unset)
 973{
 974        struct grep_opt *grep_opt = opt->value;
 975        append_grep_pattern(grep_opt, arg, "-e option", 0, GREP_PATTERN);
 976        return 0;
 977}
 978
 979int cmd_grep(int argc, const char **argv, const char *prefix)
 980{
 981        int hit = 0;
 982        int cached = 0, untracked = 0, opt_exclude = -1;
 983        int seen_dashdash = 0;
 984        int external_grep_allowed__ignored;
 985        const char *show_in_pager = NULL, *default_pager = "dummy";
 986        struct grep_opt opt;
 987        struct object_array list = OBJECT_ARRAY_INIT;
 988        struct pathspec pathspec;
 989        struct string_list path_list = STRING_LIST_INIT_NODUP;
 990        int i;
 991        int dummy;
 992        int use_index = 1;
 993        int pattern_type_arg = GREP_PATTERN_TYPE_UNSPECIFIED;
 994        int allow_revs;
 995
 996        struct option options[] = {
 997                OPT_BOOL(0, "cached", &cached,
 998                        N_("search in index instead of in the work tree")),
 999                OPT_NEGBIT(0, "no-index", &use_index,
1000                         N_("find in contents not managed by git"), 1),
1001                OPT_BOOL(0, "untracked", &untracked,
1002                        N_("search in both tracked and untracked files")),
1003                OPT_SET_INT(0, "exclude-standard", &opt_exclude,
1004                            N_("ignore files specified via '.gitignore'"), 1),
1005                OPT_BOOL(0, "recurse-submodules", &recurse_submodules,
1006                         N_("recursively search in each submodule")),
1007                OPT_STRING(0, "parent-basename", &parent_basename,
1008                           N_("basename"),
1009                           N_("prepend parent project's basename to output")),
1010                OPT_GROUP(""),
1011                OPT_BOOL('v', "invert-match", &opt.invert,
1012                        N_("show non-matching lines")),
1013                OPT_BOOL('i', "ignore-case", &opt.ignore_case,
1014                        N_("case insensitive matching")),
1015                OPT_BOOL('w', "word-regexp", &opt.word_regexp,
1016                        N_("match patterns only at word boundaries")),
1017                OPT_SET_INT('a', "text", &opt.binary,
1018                        N_("process binary files as text"), GREP_BINARY_TEXT),
1019                OPT_SET_INT('I', NULL, &opt.binary,
1020                        N_("don't match patterns in binary files"),
1021                        GREP_BINARY_NOMATCH),
1022                OPT_BOOL(0, "textconv", &opt.allow_textconv,
1023                         N_("process binary files with textconv filters")),
1024                { OPTION_INTEGER, 0, "max-depth", &opt.max_depth, N_("depth"),
1025                        N_("descend at most <depth> levels"), PARSE_OPT_NONEG,
1026                        NULL, 1 },
1027                OPT_GROUP(""),
1028                OPT_SET_INT('E', "extended-regexp", &pattern_type_arg,
1029                            N_("use extended POSIX regular expressions"),
1030                            GREP_PATTERN_TYPE_ERE),
1031                OPT_SET_INT('G', "basic-regexp", &pattern_type_arg,
1032                            N_("use basic POSIX regular expressions (default)"),
1033                            GREP_PATTERN_TYPE_BRE),
1034                OPT_SET_INT('F', "fixed-strings", &pattern_type_arg,
1035                            N_("interpret patterns as fixed strings"),
1036                            GREP_PATTERN_TYPE_FIXED),
1037                OPT_SET_INT('P', "perl-regexp", &pattern_type_arg,
1038                            N_("use Perl-compatible regular expressions"),
1039                            GREP_PATTERN_TYPE_PCRE),
1040                OPT_GROUP(""),
1041                OPT_BOOL('n', "line-number", &opt.linenum, N_("show line numbers")),
1042                OPT_NEGBIT('h', NULL, &opt.pathname, N_("don't show filenames"), 1),
1043                OPT_BIT('H', NULL, &opt.pathname, N_("show filenames"), 1),
1044                OPT_NEGBIT(0, "full-name", &opt.relative,
1045                        N_("show filenames relative to top directory"), 1),
1046                OPT_BOOL('l', "files-with-matches", &opt.name_only,
1047                        N_("show only filenames instead of matching lines")),
1048                OPT_BOOL(0, "name-only", &opt.name_only,
1049                        N_("synonym for --files-with-matches")),
1050                OPT_BOOL('L', "files-without-match",
1051                        &opt.unmatch_name_only,
1052                        N_("show only the names of files without match")),
1053                OPT_BOOL('z', "null", &opt.null_following_name,
1054                        N_("print NUL after filenames")),
1055                OPT_BOOL('c', "count", &opt.count,
1056                        N_("show the number of matches instead of matching lines")),
1057                OPT__COLOR(&opt.color, N_("highlight matches")),
1058                OPT_BOOL(0, "break", &opt.file_break,
1059                        N_("print empty line between matches from different files")),
1060                OPT_BOOL(0, "heading", &opt.heading,
1061                        N_("show filename only once above matches from same file")),
1062                OPT_GROUP(""),
1063                OPT_CALLBACK('C', "context", &opt, N_("n"),
1064                        N_("show <n> context lines before and after matches"),
1065                        context_callback),
1066                OPT_INTEGER('B', "before-context", &opt.pre_context,
1067                        N_("show <n> context lines before matches")),
1068                OPT_INTEGER('A', "after-context", &opt.post_context,
1069                        N_("show <n> context lines after matches")),
1070                OPT_INTEGER(0, "threads", &num_threads,
1071                        N_("use <n> worker threads")),
1072                OPT_NUMBER_CALLBACK(&opt, N_("shortcut for -C NUM"),
1073                        context_callback),
1074                OPT_BOOL('p', "show-function", &opt.funcname,
1075                        N_("show a line with the function name before matches")),
1076                OPT_BOOL('W', "function-context", &opt.funcbody,
1077                        N_("show the surrounding function")),
1078                OPT_GROUP(""),
1079                OPT_CALLBACK('f', NULL, &opt, N_("file"),
1080                        N_("read patterns from file"), file_callback),
1081                { OPTION_CALLBACK, 'e', NULL, &opt, N_("pattern"),
1082                        N_("match <pattern>"), PARSE_OPT_NONEG, pattern_callback },
1083                { OPTION_CALLBACK, 0, "and", &opt, NULL,
1084                  N_("combine patterns specified with -e"),
1085                  PARSE_OPT_NOARG | PARSE_OPT_NONEG, and_callback },
1086                OPT_BOOL(0, "or", &dummy, ""),
1087                { OPTION_CALLBACK, 0, "not", &opt, NULL, "",
1088                  PARSE_OPT_NOARG | PARSE_OPT_NONEG, not_callback },
1089                { OPTION_CALLBACK, '(', NULL, &opt, NULL, "",
1090                  PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
1091                  open_callback },
1092                { OPTION_CALLBACK, ')', NULL, &opt, NULL, "",
1093                  PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
1094                  close_callback },
1095                OPT__QUIET(&opt.status_only,
1096                           N_("indicate hit with exit status without output")),
1097                OPT_BOOL(0, "all-match", &opt.all_match,
1098                        N_("show only matches from files that match all patterns")),
1099                { OPTION_SET_INT, 0, "debug", &opt.debug, NULL,
1100                  N_("show parse tree for grep expression"),
1101                  PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 1 },
1102                OPT_GROUP(""),
1103                { OPTION_STRING, 'O', "open-files-in-pager", &show_in_pager,
1104                        N_("pager"), N_("show matching files in the pager"),
1105                        PARSE_OPT_OPTARG, NULL, (intptr_t)default_pager },
1106                OPT_BOOL(0, "ext-grep", &external_grep_allowed__ignored,
1107                         N_("allow calling of grep(1) (ignored by this build)")),
1108                OPT_END()
1109        };
1110
1111        init_grep_defaults();
1112        git_config(grep_cmd_config, NULL);
1113        grep_init(&opt, prefix);
1114        super_prefix = get_super_prefix();
1115
1116        /*
1117         * If there is no -- then the paths must exist in the working
1118         * tree.  If there is no explicit pattern specified with -e or
1119         * -f, we take the first unrecognized non option to be the
1120         * pattern, but then what follows it must be zero or more
1121         * valid refs up to the -- (if exists), and then existing
1122         * paths.  If there is an explicit pattern, then the first
1123         * unrecognized non option is the beginning of the refs list
1124         * that continues up to the -- (if exists), and then paths.
1125         */
1126        argc = parse_options(argc, argv, prefix, options, grep_usage,
1127                             PARSE_OPT_KEEP_DASHDASH |
1128                             PARSE_OPT_STOP_AT_NON_OPTION);
1129        grep_commit_pattern_type(pattern_type_arg, &opt);
1130
1131        if (use_index && !startup_info->have_repository) {
1132                int fallback = 0;
1133                git_config_get_bool("grep.fallbacktonoindex", &fallback);
1134                if (fallback)
1135                        use_index = 0;
1136                else
1137                        /* die the same way as if we did it at the beginning */
1138                        setup_git_directory();
1139        }
1140
1141        /*
1142         * skip a -- separator; we know it cannot be
1143         * separating revisions from pathnames if
1144         * we haven't even had any patterns yet
1145         */
1146        if (argc > 0 && !opt.pattern_list && !strcmp(argv[0], "--")) {
1147                argv++;
1148                argc--;
1149        }
1150
1151        /* First unrecognized non-option token */
1152        if (argc > 0 && !opt.pattern_list) {
1153                append_grep_pattern(&opt, argv[0], "command line", 0,
1154                                    GREP_PATTERN);
1155                argv++;
1156                argc--;
1157        }
1158
1159        if (show_in_pager == default_pager)
1160                show_in_pager = git_pager(1);
1161        if (show_in_pager) {
1162                opt.color = 0;
1163                opt.name_only = 1;
1164                opt.null_following_name = 1;
1165                opt.output_priv = &path_list;
1166                opt.output = append_path;
1167                string_list_append(&path_list, show_in_pager);
1168        }
1169
1170        if (!opt.pattern_list)
1171                die(_("no pattern given."));
1172        if (!opt.fixed && opt.ignore_case)
1173                opt.regflags |= REG_ICASE;
1174
1175        /*
1176         * We have to find "--" in a separate pass, because its presence
1177         * influences how we will parse arguments that come before it.
1178         */
1179        for (i = 0; i < argc; i++) {
1180                if (!strcmp(argv[i], "--")) {
1181                        seen_dashdash = 1;
1182                        break;
1183                }
1184        }
1185
1186        /*
1187         * Resolve any rev arguments. If we have a dashdash, then everything up
1188         * to it must resolve as a rev. If not, then we stop at the first
1189         * non-rev and assume everything else is a path.
1190         */
1191        allow_revs = use_index && !untracked;
1192        for (i = 0; i < argc; i++) {
1193                const char *arg = argv[i];
1194                struct object_id oid;
1195                struct object_context oc;
1196                struct object *object;
1197
1198                if (!strcmp(arg, "--")) {
1199                        i++;
1200                        break;
1201                }
1202
1203                if (!allow_revs) {
1204                        if (seen_dashdash)
1205                                die(_("--no-index or --untracked cannot be used with revs"));
1206                        break;
1207                }
1208
1209                if (get_sha1_with_context(arg, GET_SHA1_RECORD_PATH,
1210                                          oid.hash, &oc)) {
1211                        if (seen_dashdash)
1212                                die(_("unable to resolve revision: %s"), arg);
1213                        break;
1214                }
1215
1216                object = parse_object_or_die(&oid, arg);
1217                if (!seen_dashdash)
1218                        verify_non_filename(prefix, arg);
1219                add_object_array_with_path(object, arg, &list, oc.mode, oc.path);
1220                free(oc.path);
1221        }
1222
1223        /*
1224         * Anything left over is presumed to be a path. But in the non-dashdash
1225         * "do what I mean" case, we verify and complain when that isn't true.
1226         */
1227        if (!seen_dashdash) {
1228                int j;
1229                for (j = i; j < argc; j++)
1230                        verify_filename(prefix, argv[j], j == i && allow_revs);
1231        }
1232
1233        parse_pathspec(&pathspec, 0,
1234                       PATHSPEC_PREFER_CWD |
1235                       (opt.max_depth != -1 ? PATHSPEC_MAXDEPTH_VALID : 0),
1236                       prefix, argv + i);
1237        pathspec.max_depth = opt.max_depth;
1238        pathspec.recursive = 1;
1239
1240#ifndef NO_PTHREADS
1241        if (list.nr || cached || show_in_pager)
1242                num_threads = 0;
1243        else if (num_threads == 0)
1244                num_threads = GREP_NUM_THREADS_DEFAULT;
1245        else if (num_threads < 0)
1246                die(_("invalid number of threads specified (%d)"), num_threads);
1247        if (num_threads == 1)
1248                num_threads = 0;
1249#else
1250        if (num_threads)
1251                warning(_("no threads support, ignoring --threads"));
1252        num_threads = 0;
1253#endif
1254
1255        if (!num_threads)
1256                /*
1257                 * The compiled patterns on the main path are only
1258                 * used when not using threading. Otherwise
1259                 * start_threads() below calls compile_grep_patterns()
1260                 * for each thread.
1261                 */
1262                compile_grep_patterns(&opt);
1263
1264#ifndef NO_PTHREADS
1265        if (num_threads) {
1266                if (!(opt.name_only || opt.unmatch_name_only || opt.count)
1267                    && (opt.pre_context || opt.post_context ||
1268                        opt.file_break || opt.funcbody))
1269                        skip_first_line = 1;
1270                start_threads(&opt);
1271        }
1272#endif
1273
1274        if (recurse_submodules) {
1275                gitmodules_config();
1276                compile_submodule_options(&opt, argv + i, cached, untracked,
1277                                          opt_exclude, use_index,
1278                                          pattern_type_arg);
1279        }
1280
1281        if (show_in_pager && (cached || list.nr))
1282                die(_("--open-files-in-pager only works on the worktree"));
1283
1284        if (show_in_pager && opt.pattern_list && !opt.pattern_list->next) {
1285                const char *pager = path_list.items[0].string;
1286                int len = strlen(pager);
1287
1288                if (len > 4 && is_dir_sep(pager[len - 5]))
1289                        pager += len - 4;
1290
1291                if (opt.ignore_case && !strcmp("less", pager))
1292                        string_list_append(&path_list, "-I");
1293
1294                if (!strcmp("less", pager) || !strcmp("vi", pager)) {
1295                        struct strbuf buf = STRBUF_INIT;
1296                        strbuf_addf(&buf, "+/%s%s",
1297                                        strcmp("less", pager) ? "" : "*",
1298                                        opt.pattern_list->pattern);
1299                        string_list_append(&path_list, buf.buf);
1300                        strbuf_detach(&buf, NULL);
1301                }
1302        }
1303
1304        if (recurse_submodules && (!use_index || untracked))
1305                die(_("option not supported with --recurse-submodules."));
1306
1307        if (!show_in_pager && !opt.status_only)
1308                setup_pager();
1309
1310        if (!use_index && (untracked || cached))
1311                die(_("--cached or --untracked cannot be used with --no-index."));
1312
1313        if (!use_index || untracked) {
1314                int use_exclude = (opt_exclude < 0) ? use_index : !!opt_exclude;
1315                hit = grep_directory(&opt, &pathspec, use_exclude, use_index);
1316        } else if (0 <= opt_exclude) {
1317                die(_("--[no-]exclude-standard cannot be used for tracked contents."));
1318        } else if (!list.nr) {
1319                if (!cached)
1320                        setup_work_tree();
1321
1322                hit = grep_cache(&opt, &pathspec, cached);
1323        } else {
1324                if (cached)
1325                        die(_("both --cached and trees are given."));
1326                hit = grep_objects(&opt, &pathspec, &list);
1327        }
1328
1329        if (num_threads)
1330                hit |= wait_all();
1331        if (hit && show_in_pager)
1332                run_pager(&opt, prefix);
1333        clear_pathspec(&pathspec);
1334        free_grep_patterns(&opt);
1335        return !hit;
1336}