diff options
Diffstat (limited to 'builtin/grep.c')
-rw-r--r-- | builtin/grep.c | 1335 |
1 files changed, 1335 insertions, 0 deletions
diff --git a/builtin/grep.c b/builtin/grep.c new file mode 100644 index 0000000000..7e79eb1a75 --- /dev/null +++ b/builtin/grep.c @@ -0,0 +1,1335 @@ +/* + * Builtin "git grep" + * + * Copyright (c) 2006 Junio C Hamano + */ +#include "cache.h" +#include "repository.h" +#include "config.h" +#include "blob.h" +#include "tree.h" +#include "commit.h" +#include "tag.h" +#include "tree-walk.h" +#include "builtin.h" +#include "parse-options.h" +#include "string-list.h" +#include "run-command.h" +#include "userdiff.h" +#include "grep.h" +#include "quote.h" +#include "dir.h" +#include "pathspec.h" +#include "submodule.h" +#include "submodule-config.h" + +static char const * const grep_usage[] = { + N_("git grep [<options>] [-e] <pattern> [<rev>...] [[--] <path>...]"), + NULL +}; + +static const char *super_prefix; +static int recurse_submodules; +static struct argv_array submodule_options = ARGV_ARRAY_INIT; +static const char *parent_basename; + +static int grep_submodule_launch(struct grep_opt *opt, + const struct grep_source *gs); + +#define GREP_NUM_THREADS_DEFAULT 8 +static int num_threads; + +#ifndef NO_PTHREADS +static pthread_t *threads; + +/* We use one producer thread and THREADS consumer + * threads. The producer adds struct work_items to 'todo' and the + * consumers pick work items from the same array. + */ +struct work_item { + struct grep_source source; + char done; + struct strbuf out; +}; + +/* In the range [todo_done, todo_start) in 'todo' we have work_items + * that have been or are processed by a consumer thread. We haven't + * written the result for these to stdout yet. + * + * The work_items in [todo_start, todo_end) are waiting to be picked + * up by a consumer thread. + * + * The ranges are modulo TODO_SIZE. + */ +#define TODO_SIZE 128 +static struct work_item todo[TODO_SIZE]; +static int todo_start; +static int todo_end; +static int todo_done; + +/* Has all work items been added? */ +static int all_work_added; + +/* This lock protects all the variables above. */ +static pthread_mutex_t grep_mutex; + +static inline void grep_lock(void) +{ + assert(num_threads); + pthread_mutex_lock(&grep_mutex); +} + +static inline void grep_unlock(void) +{ + assert(num_threads); + pthread_mutex_unlock(&grep_mutex); +} + +/* Signalled when a new work_item is added to todo. */ +static pthread_cond_t cond_add; + +/* Signalled when the result from one work_item is written to + * stdout. + */ +static pthread_cond_t cond_write; + +/* Signalled when we are finished with everything. */ +static pthread_cond_t cond_result; + +static int skip_first_line; + +static void add_work(struct grep_opt *opt, enum grep_source_type type, + const char *name, const char *path, const void *id) +{ + grep_lock(); + + while ((todo_end+1) % ARRAY_SIZE(todo) == todo_done) { + pthread_cond_wait(&cond_write, &grep_mutex); + } + + grep_source_init(&todo[todo_end].source, type, name, path, id); + if (opt->binary != GREP_BINARY_TEXT) + grep_source_load_driver(&todo[todo_end].source); + todo[todo_end].done = 0; + strbuf_reset(&todo[todo_end].out); + todo_end = (todo_end + 1) % ARRAY_SIZE(todo); + + pthread_cond_signal(&cond_add); + grep_unlock(); +} + +static struct work_item *get_work(void) +{ + struct work_item *ret; + + grep_lock(); + while (todo_start == todo_end && !all_work_added) { + pthread_cond_wait(&cond_add, &grep_mutex); + } + + if (todo_start == todo_end && all_work_added) { + ret = NULL; + } else { + ret = &todo[todo_start]; + todo_start = (todo_start + 1) % ARRAY_SIZE(todo); + } + grep_unlock(); + return ret; +} + +static void work_done(struct work_item *w) +{ + int old_done; + + grep_lock(); + w->done = 1; + old_done = todo_done; + for(; todo[todo_done].done && todo_done != todo_start; + todo_done = (todo_done+1) % ARRAY_SIZE(todo)) { + w = &todo[todo_done]; + if (w->out.len) { + const char *p = w->out.buf; + size_t len = w->out.len; + + /* Skip the leading hunk mark of the first file. */ + if (skip_first_line) { + while (len) { + len--; + if (*p++ == '\n') + break; + } + skip_first_line = 0; + } + + write_or_die(1, p, len); + } + grep_source_clear(&w->source); + } + + if (old_done != todo_done) + pthread_cond_signal(&cond_write); + + if (all_work_added && todo_done == todo_end) + pthread_cond_signal(&cond_result); + + grep_unlock(); +} + +static void *run(void *arg) +{ + int hit = 0; + struct grep_opt *opt = arg; + + while (1) { + struct work_item *w = get_work(); + if (!w) + break; + + opt->output_priv = w; + if (w->source.type == GREP_SOURCE_SUBMODULE) + hit |= grep_submodule_launch(opt, &w->source); + else + hit |= grep_source(opt, &w->source); + grep_source_clear_data(&w->source); + work_done(w); + } + free_grep_patterns(arg); + free(arg); + + return (void*) (intptr_t) hit; +} + +static void strbuf_out(struct grep_opt *opt, const void *buf, size_t size) +{ + struct work_item *w = opt->output_priv; + strbuf_add(&w->out, buf, size); +} + +static void start_threads(struct grep_opt *opt) +{ + int i; + + pthread_mutex_init(&grep_mutex, NULL); + pthread_mutex_init(&grep_read_mutex, NULL); + pthread_mutex_init(&grep_attr_mutex, NULL); + pthread_cond_init(&cond_add, NULL); + pthread_cond_init(&cond_write, NULL); + pthread_cond_init(&cond_result, NULL); + grep_use_locks = 1; + + for (i = 0; i < ARRAY_SIZE(todo); i++) { + strbuf_init(&todo[i].out, 0); + } + + threads = xcalloc(num_threads, sizeof(*threads)); + for (i = 0; i < num_threads; i++) { + int err; + struct grep_opt *o = grep_opt_dup(opt); + o->output = strbuf_out; + if (i) + o->debug = 0; + compile_grep_patterns(o); + err = pthread_create(&threads[i], NULL, run, o); + + if (err) + die(_("grep: failed to create thread: %s"), + strerror(err)); + } +} + +static int wait_all(void) +{ + int hit = 0; + int i; + + grep_lock(); + all_work_added = 1; + + /* Wait until all work is done. */ + while (todo_done != todo_end) + pthread_cond_wait(&cond_result, &grep_mutex); + + /* Wake up all the consumer threads so they can see that there + * is no more work to do. + */ + pthread_cond_broadcast(&cond_add); + grep_unlock(); + + for (i = 0; i < num_threads; i++) { + void *h; + pthread_join(threads[i], &h); + hit |= (int) (intptr_t) h; + } + + free(threads); + + pthread_mutex_destroy(&grep_mutex); + pthread_mutex_destroy(&grep_read_mutex); + pthread_mutex_destroy(&grep_attr_mutex); + pthread_cond_destroy(&cond_add); + pthread_cond_destroy(&cond_write); + pthread_cond_destroy(&cond_result); + grep_use_locks = 0; + + return hit; +} +#else /* !NO_PTHREADS */ + +static int wait_all(void) +{ + return 0; +} +#endif + +static int grep_cmd_config(const char *var, const char *value, void *cb) +{ + int st = grep_config(var, value, cb); + if (git_color_default_config(var, value, cb) < 0) + st = -1; + + if (!strcmp(var, "grep.threads")) { + num_threads = git_config_int(var, value); + if (num_threads < 0) + die(_("invalid number of threads specified (%d) for %s"), + num_threads, var); +#ifdef NO_PTHREADS + else if (num_threads && num_threads != 1) { + /* + * TRANSLATORS: %s is the configuration + * variable for tweaking threads, currently + * grep.threads + */ + warning(_("no threads support, ignoring %s"), var); + num_threads = 0; + } +#endif + } + + if (!strcmp(var, "submodule.recurse")) + recurse_submodules = git_config_bool(var, value); + + return st; +} + +static void *lock_and_read_oid_file(const struct object_id *oid, enum object_type *type, unsigned long *size) +{ + void *data; + + grep_read_lock(); + data = read_sha1_file(oid->hash, type, size); + grep_read_unlock(); + return data; +} + +static int grep_oid(struct grep_opt *opt, const struct object_id *oid, + const char *filename, int tree_name_len, + const char *path) +{ + struct strbuf pathbuf = STRBUF_INIT; + + if (super_prefix) { + strbuf_add(&pathbuf, filename, tree_name_len); + strbuf_addstr(&pathbuf, super_prefix); + strbuf_addstr(&pathbuf, filename + tree_name_len); + } else { + strbuf_addstr(&pathbuf, filename); + } + + if (opt->relative && opt->prefix_length) { + char *name = strbuf_detach(&pathbuf, NULL); + quote_path_relative(name + tree_name_len, opt->prefix, &pathbuf); + strbuf_insert(&pathbuf, 0, name, tree_name_len); + free(name); + } + +#ifndef NO_PTHREADS + if (num_threads) { + add_work(opt, GREP_SOURCE_OID, pathbuf.buf, path, oid); + strbuf_release(&pathbuf); + return 0; + } else +#endif + { + struct grep_source gs; + int hit; + + grep_source_init(&gs, GREP_SOURCE_OID, pathbuf.buf, path, oid); + strbuf_release(&pathbuf); + hit = grep_source(opt, &gs); + + grep_source_clear(&gs); + return hit; + } +} + +static int grep_file(struct grep_opt *opt, const char *filename) +{ + struct strbuf buf = STRBUF_INIT; + + if (super_prefix) + strbuf_addstr(&buf, super_prefix); + strbuf_addstr(&buf, filename); + + if (opt->relative && opt->prefix_length) { + char *name = strbuf_detach(&buf, NULL); + quote_path_relative(name, opt->prefix, &buf); + free(name); + } + +#ifndef NO_PTHREADS + if (num_threads) { + add_work(opt, GREP_SOURCE_FILE, buf.buf, filename, filename); + strbuf_release(&buf); + return 0; + } else +#endif + { + struct grep_source gs; + int hit; + + grep_source_init(&gs, GREP_SOURCE_FILE, buf.buf, filename, filename); + strbuf_release(&buf); + hit = grep_source(opt, &gs); + + grep_source_clear(&gs); + return hit; + } +} + +static void append_path(struct grep_opt *opt, const void *data, size_t len) +{ + struct string_list *path_list = opt->output_priv; + + if (len == 1 && *(const char *)data == '\0') + return; + string_list_append(path_list, xstrndup(data, len)); +} + +static void run_pager(struct grep_opt *opt, const char *prefix) +{ + struct string_list *path_list = opt->output_priv; + struct child_process child = CHILD_PROCESS_INIT; + int i, status; + + for (i = 0; i < path_list->nr; i++) + argv_array_push(&child.args, path_list->items[i].string); + child.dir = prefix; + child.use_shell = 1; + + status = run_command(&child); + if (status) + exit(status); +} + +static void compile_submodule_options(const struct grep_opt *opt, + const char **argv, + int cached, int untracked, + int opt_exclude, int use_index, + int pattern_type_arg) +{ + struct grep_pat *pattern; + + if (recurse_submodules) + argv_array_push(&submodule_options, "--recurse-submodules"); + + if (cached) + argv_array_push(&submodule_options, "--cached"); + if (!use_index) + argv_array_push(&submodule_options, "--no-index"); + if (untracked) + argv_array_push(&submodule_options, "--untracked"); + if (opt_exclude > 0) + argv_array_push(&submodule_options, "--exclude-standard"); + + if (opt->invert) + argv_array_push(&submodule_options, "-v"); + if (opt->ignore_case) + argv_array_push(&submodule_options, "-i"); + if (opt->word_regexp) + argv_array_push(&submodule_options, "-w"); + switch (opt->binary) { + case GREP_BINARY_NOMATCH: + argv_array_push(&submodule_options, "-I"); + break; + case GREP_BINARY_TEXT: + argv_array_push(&submodule_options, "-a"); + break; + default: + break; + } + if (opt->allow_textconv) + argv_array_push(&submodule_options, "--textconv"); + if (opt->max_depth != -1) + argv_array_pushf(&submodule_options, "--max-depth=%d", + opt->max_depth); + if (opt->linenum) + argv_array_push(&submodule_options, "-n"); + if (!opt->pathname) + argv_array_push(&submodule_options, "-h"); + if (!opt->relative) + argv_array_push(&submodule_options, "--full-name"); + if (opt->name_only) + argv_array_push(&submodule_options, "-l"); + if (opt->unmatch_name_only) + argv_array_push(&submodule_options, "-L"); + if (opt->null_following_name) + argv_array_push(&submodule_options, "-z"); + if (opt->count) + argv_array_push(&submodule_options, "-c"); + if (opt->file_break) + argv_array_push(&submodule_options, "--break"); + if (opt->heading) + argv_array_push(&submodule_options, "--heading"); + if (opt->pre_context) + argv_array_pushf(&submodule_options, "--before-context=%d", + opt->pre_context); + if (opt->post_context) + argv_array_pushf(&submodule_options, "--after-context=%d", + opt->post_context); + if (opt->funcname) + argv_array_push(&submodule_options, "-p"); + if (opt->funcbody) + argv_array_push(&submodule_options, "-W"); + if (opt->all_match) + argv_array_push(&submodule_options, "--all-match"); + if (opt->debug) + argv_array_push(&submodule_options, "--debug"); + if (opt->status_only) + argv_array_push(&submodule_options, "-q"); + + switch (pattern_type_arg) { + case GREP_PATTERN_TYPE_BRE: + argv_array_push(&submodule_options, "-G"); + break; + case GREP_PATTERN_TYPE_ERE: + argv_array_push(&submodule_options, "-E"); + break; + case GREP_PATTERN_TYPE_FIXED: + argv_array_push(&submodule_options, "-F"); + break; + case GREP_PATTERN_TYPE_PCRE: + argv_array_push(&submodule_options, "-P"); + break; + case GREP_PATTERN_TYPE_UNSPECIFIED: + break; + default: + die("BUG: Added a new grep pattern type without updating switch statement"); + } + + for (pattern = opt->pattern_list; pattern != NULL; + pattern = pattern->next) { + switch (pattern->token) { + case GREP_PATTERN: + argv_array_pushf(&submodule_options, "-e%s", + pattern->pattern); + break; + case GREP_AND: + case GREP_OPEN_PAREN: + case GREP_CLOSE_PAREN: + case GREP_NOT: + case GREP_OR: + argv_array_push(&submodule_options, pattern->pattern); + break; + /* BODY and HEAD are not used by git-grep */ + case GREP_PATTERN_BODY: + case GREP_PATTERN_HEAD: + break; + } + } + + /* + * Limit number of threads for child process to use. + * This is to prevent potential fork-bomb behavior of git-grep as each + * submodule process has its own thread pool. + */ + argv_array_pushf(&submodule_options, "--threads=%d", + DIV_ROUND_UP(num_threads, 2)); + + /* Add Pathspecs */ + argv_array_push(&submodule_options, "--"); + for (; *argv; argv++) + argv_array_push(&submodule_options, *argv); +} + +/* + * Launch child process to grep contents of a submodule + */ +static int grep_submodule_launch(struct grep_opt *opt, + const struct grep_source *gs) +{ + struct child_process cp = CHILD_PROCESS_INIT; + int status, i; + const char *end_of_base; + const char *name; + struct strbuf child_output = STRBUF_INIT; + + end_of_base = strchr(gs->name, ':'); + if (gs->identifier && end_of_base) + name = end_of_base + 1; + else + name = gs->name; + + prepare_submodule_repo_env(&cp.env_array); + argv_array_push(&cp.env_array, GIT_DIR_ENVIRONMENT); + + if (opt->relative && opt->prefix_length) + argv_array_pushf(&cp.env_array, "%s=%s", + GIT_TOPLEVEL_PREFIX_ENVIRONMENT, + opt->prefix); + + /* Add super prefix */ + argv_array_pushf(&cp.args, "--super-prefix=%s%s/", + super_prefix ? super_prefix : "", + name); + argv_array_push(&cp.args, "grep"); + + /* + * Add basename of parent project + * When performing grep on a tree object the filename is prefixed + * with the object's name: 'tree-name:filename'. In order to + * provide uniformity of output we want to pass the name of the + * parent project's object name to the submodule so the submodule can + * prefix its output with the parent's name and not its own OID. + */ + if (gs->identifier && end_of_base) + argv_array_pushf(&cp.args, "--parent-basename=%.*s", + (int) (end_of_base - gs->name), + gs->name); + + /* Add options */ + for (i = 0; i < submodule_options.argc; i++) { + /* + * If there is a tree identifier for the submodule, add the + * rev after adding the submodule options but before the + * pathspecs. To do this we listen for the '--' and insert the + * oid before pushing the '--' onto the child process argv + * array. + */ + if (gs->identifier && + !strcmp("--", submodule_options.argv[i])) { + argv_array_push(&cp.args, oid_to_hex(gs->identifier)); + } + + argv_array_push(&cp.args, submodule_options.argv[i]); + } + + cp.git_cmd = 1; + cp.dir = gs->path; + + /* + * Capture output to output buffer and check the return code from the + * child process. A '0' indicates a hit, a '1' indicates no hit and + * anything else is an error. + */ + status = capture_command(&cp, &child_output, 0); + if (status && (status != 1)) { + /* flush the buffer */ + write_or_die(1, child_output.buf, child_output.len); + die("process for submodule '%s' failed with exit code: %d", + gs->name, status); + } + + opt->output(opt, child_output.buf, child_output.len); + strbuf_release(&child_output); + /* invert the return code to make a hit equal to 1 */ + return !status; +} + +/* + * Prep grep structures for a submodule grep + * oid: the oid of the submodule or NULL if using the working tree + * filename: name of the submodule including tree name of parent + * path: location of the submodule + */ +static int grep_submodule(struct grep_opt *opt, const struct object_id *oid, + const char *filename, const char *path) +{ + if (!is_submodule_active(the_repository, path)) + return 0; + if (!is_submodule_populated_gently(path, NULL)) { + /* + * If searching history, check for the presence of the + * submodule's gitdir before skipping the submodule. + */ + if (oid) { + const struct submodule *sub = + submodule_from_path(null_sha1, path); + if (sub) + path = git_path("modules/%s", sub->name); + + if (!(is_directory(path) && is_git_directory(path))) + return 0; + } else { + return 0; + } + } + +#ifndef NO_PTHREADS + if (num_threads) { + add_work(opt, GREP_SOURCE_SUBMODULE, filename, path, oid); + return 0; + } else +#endif + { + struct grep_source gs; + int hit; + + grep_source_init(&gs, GREP_SOURCE_SUBMODULE, + filename, path, oid); + hit = grep_submodule_launch(opt, &gs); + + grep_source_clear(&gs); + return hit; + } +} + +static int grep_cache(struct grep_opt *opt, const struct pathspec *pathspec, + int cached) +{ + int hit = 0; + int nr; + struct strbuf name = STRBUF_INIT; + int name_base_len = 0; + if (super_prefix) { + name_base_len = strlen(super_prefix); + strbuf_addstr(&name, super_prefix); + } + + read_cache(); + + for (nr = 0; nr < active_nr; nr++) { + const struct cache_entry *ce = active_cache[nr]; + strbuf_setlen(&name, name_base_len); + strbuf_addstr(&name, ce->name); + + if (S_ISREG(ce->ce_mode) && + match_pathspec(pathspec, name.buf, name.len, 0, NULL, + S_ISDIR(ce->ce_mode) || + S_ISGITLINK(ce->ce_mode))) { + /* + * If CE_VALID is on, we assume worktree file and its + * cache entry are identical, even if worktree file has + * been modified, so use cache version instead + */ + if (cached || (ce->ce_flags & CE_VALID) || + ce_skip_worktree(ce)) { + if (ce_stage(ce) || ce_intent_to_add(ce)) + continue; + hit |= grep_oid(opt, &ce->oid, ce->name, + 0, ce->name); + } else { + hit |= grep_file(opt, ce->name); + } + } else if (recurse_submodules && S_ISGITLINK(ce->ce_mode) && + submodule_path_match(pathspec, name.buf, NULL)) { + hit |= grep_submodule(opt, NULL, ce->name, ce->name); + } else { + continue; + } + + if (ce_stage(ce)) { + do { + nr++; + } while (nr < active_nr && + !strcmp(ce->name, active_cache[nr]->name)); + nr--; /* compensate for loop control */ + } + if (hit && opt->status_only) + break; + } + + strbuf_release(&name); + return hit; +} + +static int grep_tree(struct grep_opt *opt, const struct pathspec *pathspec, + struct tree_desc *tree, struct strbuf *base, int tn_len, + int check_attr) +{ + int hit = 0; + enum interesting match = entry_not_interesting; + struct name_entry entry; + int old_baselen = base->len; + struct strbuf name = STRBUF_INIT; + int name_base_len = 0; + if (super_prefix) { + strbuf_addstr(&name, super_prefix); + name_base_len = name.len; + } + + while (tree_entry(tree, &entry)) { + int te_len = tree_entry_len(&entry); + + if (match != all_entries_interesting) { + strbuf_addstr(&name, base->buf + tn_len); + match = tree_entry_interesting(&entry, &name, + 0, pathspec); + strbuf_setlen(&name, name_base_len); + + if (match == all_entries_not_interesting) + break; + if (match == entry_not_interesting) + continue; + } + + strbuf_add(base, entry.path, te_len); + + if (S_ISREG(entry.mode)) { + hit |= grep_oid(opt, entry.oid, base->buf, tn_len, + check_attr ? base->buf + tn_len : NULL); + } else if (S_ISDIR(entry.mode)) { + enum object_type type; + struct tree_desc sub; + void *data; + unsigned long size; + + data = lock_and_read_oid_file(entry.oid, &type, &size); + if (!data) + die(_("unable to read tree (%s)"), + oid_to_hex(entry.oid)); + + strbuf_addch(base, '/'); + init_tree_desc(&sub, data, size); + hit |= grep_tree(opt, pathspec, &sub, base, tn_len, + check_attr); + free(data); + } else if (recurse_submodules && S_ISGITLINK(entry.mode)) { + hit |= grep_submodule(opt, entry.oid, base->buf, + base->buf + tn_len); + } + + strbuf_setlen(base, old_baselen); + + if (hit && opt->status_only) + break; + } + + strbuf_release(&name); + return hit; +} + +static int grep_object(struct grep_opt *opt, const struct pathspec *pathspec, + struct object *obj, const char *name, const char *path) +{ + if (obj->type == OBJ_BLOB) + return grep_oid(opt, &obj->oid, name, 0, path); + if (obj->type == OBJ_COMMIT || obj->type == OBJ_TREE) { + struct tree_desc tree; + void *data; + unsigned long size; + struct strbuf base; + int hit, len; + + grep_read_lock(); + data = read_object_with_reference(obj->oid.hash, tree_type, + &size, NULL); + grep_read_unlock(); + + if (!data) + die(_("unable to read tree (%s)"), oid_to_hex(&obj->oid)); + + /* Use parent's name as base when recursing submodules */ + if (recurse_submodules && parent_basename) + name = parent_basename; + + len = name ? strlen(name) : 0; + strbuf_init(&base, PATH_MAX + len + 1); + if (len) { + strbuf_add(&base, name, len); + strbuf_addch(&base, ':'); + } + init_tree_desc(&tree, data, size); + hit = grep_tree(opt, pathspec, &tree, &base, base.len, + obj->type == OBJ_COMMIT); + strbuf_release(&base); + free(data); + return hit; + } + die(_("unable to grep from object of type %s"), typename(obj->type)); +} + +static int grep_objects(struct grep_opt *opt, const struct pathspec *pathspec, + const struct object_array *list) +{ + unsigned int i; + int hit = 0; + const unsigned int nr = list->nr; + + for (i = 0; i < nr; i++) { + struct object *real_obj; + real_obj = deref_tag(list->objects[i].item, NULL, 0); + + /* load the gitmodules file for this rev */ + if (recurse_submodules) { + submodule_free(); + gitmodules_config_sha1(real_obj->oid.hash); + } + if (grep_object(opt, pathspec, real_obj, list->objects[i].name, list->objects[i].path)) { + hit = 1; + if (opt->status_only) + break; + } + } + return hit; +} + +static int grep_directory(struct grep_opt *opt, const struct pathspec *pathspec, + int exc_std, int use_index) +{ + struct dir_struct dir; + int i, hit = 0; + + memset(&dir, 0, sizeof(dir)); + if (!use_index) + dir.flags |= DIR_NO_GITLINKS; + if (exc_std) + setup_standard_excludes(&dir); + + fill_directory(&dir, &the_index, pathspec); + for (i = 0; i < dir.nr; i++) { + if (!dir_path_match(dir.entries[i], pathspec, 0, NULL)) + continue; + hit |= grep_file(opt, dir.entries[i]->name); + if (hit && opt->status_only) + break; + } + return hit; +} + +static int context_callback(const struct option *opt, const char *arg, + int unset) +{ + struct grep_opt *grep_opt = opt->value; + int value; + const char *endp; + + if (unset) { + grep_opt->pre_context = grep_opt->post_context = 0; + return 0; + } + value = strtol(arg, (char **)&endp, 10); + if (*endp) { + return error(_("switch `%c' expects a numerical value"), + opt->short_name); + } + grep_opt->pre_context = grep_opt->post_context = value; + return 0; +} + +static int file_callback(const struct option *opt, const char *arg, int unset) +{ + struct grep_opt *grep_opt = opt->value; + int from_stdin = !strcmp(arg, "-"); + FILE *patterns; + int lno = 0; + struct strbuf sb = STRBUF_INIT; + + patterns = from_stdin ? stdin : fopen(arg, "r"); + if (!patterns) + die_errno(_("cannot open '%s'"), arg); + while (strbuf_getline(&sb, patterns) == 0) { + /* ignore empty line like grep does */ + if (sb.len == 0) + continue; + + append_grep_pat(grep_opt, sb.buf, sb.len, arg, ++lno, + GREP_PATTERN); + } + if (!from_stdin) + fclose(patterns); + strbuf_release(&sb); + return 0; +} + +static int not_callback(const struct option *opt, const char *arg, int unset) +{ + struct grep_opt *grep_opt = opt->value; + append_grep_pattern(grep_opt, "--not", "command line", 0, GREP_NOT); + return 0; +} + +static int and_callback(const struct option *opt, const char *arg, int unset) +{ + struct grep_opt *grep_opt = opt->value; + append_grep_pattern(grep_opt, "--and", "command line", 0, GREP_AND); + return 0; +} + +static int open_callback(const struct option *opt, const char *arg, int unset) +{ + struct grep_opt *grep_opt = opt->value; + append_grep_pattern(grep_opt, "(", "command line", 0, GREP_OPEN_PAREN); + return 0; +} + +static int close_callback(const struct option *opt, const char *arg, int unset) +{ + struct grep_opt *grep_opt = opt->value; + append_grep_pattern(grep_opt, ")", "command line", 0, GREP_CLOSE_PAREN); + return 0; +} + +static int pattern_callback(const struct option *opt, const char *arg, + int unset) +{ + struct grep_opt *grep_opt = opt->value; + append_grep_pattern(grep_opt, arg, "-e option", 0, GREP_PATTERN); + return 0; +} + +int cmd_grep(int argc, const char **argv, const char *prefix) +{ + int hit = 0; + int cached = 0, untracked = 0, opt_exclude = -1; + int seen_dashdash = 0; + int external_grep_allowed__ignored; + const char *show_in_pager = NULL, *default_pager = "dummy"; + struct grep_opt opt; + struct object_array list = OBJECT_ARRAY_INIT; + struct pathspec pathspec; + struct string_list path_list = STRING_LIST_INIT_NODUP; + int i; + int dummy; + int use_index = 1; + int pattern_type_arg = GREP_PATTERN_TYPE_UNSPECIFIED; + int allow_revs; + + struct option options[] = { + OPT_BOOL(0, "cached", &cached, + N_("search in index instead of in the work tree")), + OPT_NEGBIT(0, "no-index", &use_index, + N_("find in contents not managed by git"), 1), + OPT_BOOL(0, "untracked", &untracked, + N_("search in both tracked and untracked files")), + OPT_SET_INT(0, "exclude-standard", &opt_exclude, + N_("ignore files specified via '.gitignore'"), 1), + OPT_BOOL(0, "recurse-submodules", &recurse_submodules, + N_("recursively search in each submodule")), + OPT_STRING(0, "parent-basename", &parent_basename, + N_("basename"), + N_("prepend parent project's basename to output")), + OPT_GROUP(""), + OPT_BOOL('v', "invert-match", &opt.invert, + N_("show non-matching lines")), + OPT_BOOL('i', "ignore-case", &opt.ignore_case, + N_("case insensitive matching")), + OPT_BOOL('w', "word-regexp", &opt.word_regexp, + N_("match patterns only at word boundaries")), + OPT_SET_INT('a', "text", &opt.binary, + N_("process binary files as text"), GREP_BINARY_TEXT), + OPT_SET_INT('I', NULL, &opt.binary, + N_("don't match patterns in binary files"), + GREP_BINARY_NOMATCH), + OPT_BOOL(0, "textconv", &opt.allow_textconv, + N_("process binary files with textconv filters")), + { OPTION_INTEGER, 0, "max-depth", &opt.max_depth, N_("depth"), + N_("descend at most <depth> levels"), PARSE_OPT_NONEG, + NULL, 1 }, + OPT_GROUP(""), + OPT_SET_INT('E', "extended-regexp", &pattern_type_arg, + N_("use extended POSIX regular expressions"), + GREP_PATTERN_TYPE_ERE), + OPT_SET_INT('G', "basic-regexp", &pattern_type_arg, + N_("use basic POSIX regular expressions (default)"), + GREP_PATTERN_TYPE_BRE), + OPT_SET_INT('F', "fixed-strings", &pattern_type_arg, + N_("interpret patterns as fixed strings"), + GREP_PATTERN_TYPE_FIXED), + OPT_SET_INT('P', "perl-regexp", &pattern_type_arg, + N_("use Perl-compatible regular expressions"), + GREP_PATTERN_TYPE_PCRE), + OPT_GROUP(""), + OPT_BOOL('n', "line-number", &opt.linenum, N_("show line numbers")), + OPT_NEGBIT('h', NULL, &opt.pathname, N_("don't show filenames"), 1), + OPT_BIT('H', NULL, &opt.pathname, N_("show filenames"), 1), + OPT_NEGBIT(0, "full-name", &opt.relative, + N_("show filenames relative to top directory"), 1), + OPT_BOOL('l', "files-with-matches", &opt.name_only, + N_("show only filenames instead of matching lines")), + OPT_BOOL(0, "name-only", &opt.name_only, + N_("synonym for --files-with-matches")), + OPT_BOOL('L', "files-without-match", + &opt.unmatch_name_only, + N_("show only the names of files without match")), + OPT_BOOL('z', "null", &opt.null_following_name, + N_("print NUL after filenames")), + OPT_BOOL('c', "count", &opt.count, + N_("show the number of matches instead of matching lines")), + OPT__COLOR(&opt.color, N_("highlight matches")), + OPT_BOOL(0, "break", &opt.file_break, + N_("print empty line between matches from different files")), + OPT_BOOL(0, "heading", &opt.heading, + N_("show filename only once above matches from same file")), + OPT_GROUP(""), + OPT_CALLBACK('C', "context", &opt, N_("n"), + N_("show <n> context lines before and after matches"), + context_callback), + OPT_INTEGER('B', "before-context", &opt.pre_context, + N_("show <n> context lines before matches")), + OPT_INTEGER('A', "after-context", &opt.post_context, + N_("show <n> context lines after matches")), + OPT_INTEGER(0, "threads", &num_threads, + N_("use <n> worker threads")), + OPT_NUMBER_CALLBACK(&opt, N_("shortcut for -C NUM"), + context_callback), + OPT_BOOL('p', "show-function", &opt.funcname, + N_("show a line with the function name before matches")), + OPT_BOOL('W', "function-context", &opt.funcbody, + N_("show the surrounding function")), + OPT_GROUP(""), + OPT_CALLBACK('f', NULL, &opt, N_("file"), + N_("read patterns from file"), file_callback), + { OPTION_CALLBACK, 'e', NULL, &opt, N_("pattern"), + N_("match <pattern>"), PARSE_OPT_NONEG, pattern_callback }, + { OPTION_CALLBACK, 0, "and", &opt, NULL, + N_("combine patterns specified with -e"), + PARSE_OPT_NOARG | PARSE_OPT_NONEG, and_callback }, + OPT_BOOL(0, "or", &dummy, ""), + { OPTION_CALLBACK, 0, "not", &opt, NULL, "", + PARSE_OPT_NOARG | PARSE_OPT_NONEG, not_callback }, + { OPTION_CALLBACK, '(', NULL, &opt, NULL, "", + PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH, + open_callback }, + { OPTION_CALLBACK, ')', NULL, &opt, NULL, "", + PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH, + close_callback }, + OPT__QUIET(&opt.status_only, + N_("indicate hit with exit status without output")), + OPT_BOOL(0, "all-match", &opt.all_match, + N_("show only matches from files that match all patterns")), + { OPTION_SET_INT, 0, "debug", &opt.debug, NULL, + N_("show parse tree for grep expression"), + PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 1 }, + OPT_GROUP(""), + { OPTION_STRING, 'O', "open-files-in-pager", &show_in_pager, + N_("pager"), N_("show matching files in the pager"), + PARSE_OPT_OPTARG, NULL, (intptr_t)default_pager }, + OPT_BOOL(0, "ext-grep", &external_grep_allowed__ignored, + N_("allow calling of grep(1) (ignored by this build)")), + OPT_END() + }; + + init_grep_defaults(); + git_config(grep_cmd_config, NULL); + grep_init(&opt, prefix); + super_prefix = get_super_prefix(); + + /* + * If there is no -- then the paths must exist in the working + * tree. If there is no explicit pattern specified with -e or + * -f, we take the first unrecognized non option to be the + * pattern, but then what follows it must be zero or more + * valid refs up to the -- (if exists), and then existing + * paths. If there is an explicit pattern, then the first + * unrecognized non option is the beginning of the refs list + * that continues up to the -- (if exists), and then paths. + */ + argc = parse_options(argc, argv, prefix, options, grep_usage, + PARSE_OPT_KEEP_DASHDASH | + PARSE_OPT_STOP_AT_NON_OPTION); + grep_commit_pattern_type(pattern_type_arg, &opt); + + if (use_index && !startup_info->have_repository) { + int fallback = 0; + git_config_get_bool("grep.fallbacktonoindex", &fallback); + if (fallback) + use_index = 0; + else + /* die the same way as if we did it at the beginning */ + setup_git_directory(); + } + + /* + * skip a -- separator; we know it cannot be + * separating revisions from pathnames if + * we haven't even had any patterns yet + */ + if (argc > 0 && !opt.pattern_list && !strcmp(argv[0], "--")) { + argv++; + argc--; + } + + /* First unrecognized non-option token */ + if (argc > 0 && !opt.pattern_list) { + append_grep_pattern(&opt, argv[0], "command line", 0, + GREP_PATTERN); + argv++; + argc--; + } + + if (show_in_pager == default_pager) + show_in_pager = git_pager(1); + if (show_in_pager) { + opt.color = 0; + opt.name_only = 1; + opt.null_following_name = 1; + opt.output_priv = &path_list; + opt.output = append_path; + string_list_append(&path_list, show_in_pager); + } + + if (!opt.pattern_list) + die(_("no pattern given.")); + + /* + * We have to find "--" in a separate pass, because its presence + * influences how we will parse arguments that come before it. + */ + for (i = 0; i < argc; i++) { + if (!strcmp(argv[i], "--")) { + seen_dashdash = 1; + break; + } + } + + /* + * Resolve any rev arguments. If we have a dashdash, then everything up + * to it must resolve as a rev. If not, then we stop at the first + * non-rev and assume everything else is a path. + */ + allow_revs = use_index && !untracked; + for (i = 0; i < argc; i++) { + const char *arg = argv[i]; + struct object_id oid; + struct object_context oc; + struct object *object; + + if (!strcmp(arg, "--")) { + i++; + break; + } + + if (!allow_revs) { + if (seen_dashdash) + die(_("--no-index or --untracked cannot be used with revs")); + break; + } + + if (get_sha1_with_context(arg, GET_SHA1_RECORD_PATH, + oid.hash, &oc)) { + if (seen_dashdash) + die(_("unable to resolve revision: %s"), arg); + break; + } + + object = parse_object_or_die(&oid, arg); + if (!seen_dashdash) + verify_non_filename(prefix, arg); + add_object_array_with_path(object, arg, &list, oc.mode, oc.path); + free(oc.path); + } + + /* + * Anything left over is presumed to be a path. But in the non-dashdash + * "do what I mean" case, we verify and complain when that isn't true. + */ + if (!seen_dashdash) { + int j; + for (j = i; j < argc; j++) + verify_filename(prefix, argv[j], j == i && allow_revs); + } + + parse_pathspec(&pathspec, 0, + PATHSPEC_PREFER_CWD | + (opt.max_depth != -1 ? PATHSPEC_MAXDEPTH_VALID : 0), + prefix, argv + i); + pathspec.max_depth = opt.max_depth; + pathspec.recursive = 1; + +#ifndef NO_PTHREADS + if (list.nr || cached || show_in_pager) + num_threads = 0; + else if (num_threads == 0) + num_threads = GREP_NUM_THREADS_DEFAULT; + else if (num_threads < 0) + die(_("invalid number of threads specified (%d)"), num_threads); + if (num_threads == 1) + num_threads = 0; +#else + if (num_threads) + warning(_("no threads support, ignoring --threads")); + num_threads = 0; +#endif + + if (!num_threads) + /* + * The compiled patterns on the main path are only + * used when not using threading. Otherwise + * start_threads() below calls compile_grep_patterns() + * for each thread. + */ + compile_grep_patterns(&opt); + +#ifndef NO_PTHREADS + if (num_threads) { + if (!(opt.name_only || opt.unmatch_name_only || opt.count) + && (opt.pre_context || opt.post_context || + opt.file_break || opt.funcbody)) + skip_first_line = 1; + start_threads(&opt); + } +#endif + + if (recurse_submodules) { + gitmodules_config(); + compile_submodule_options(&opt, argv + i, cached, untracked, + opt_exclude, use_index, + pattern_type_arg); + } + + if (show_in_pager && (cached || list.nr)) + die(_("--open-files-in-pager only works on the worktree")); + + if (show_in_pager && opt.pattern_list && !opt.pattern_list->next) { + const char *pager = path_list.items[0].string; + int len = strlen(pager); + + if (len > 4 && is_dir_sep(pager[len - 5])) + pager += len - 4; + + if (opt.ignore_case && !strcmp("less", pager)) + string_list_append(&path_list, "-I"); + + if (!strcmp("less", pager) || !strcmp("vi", pager)) { + struct strbuf buf = STRBUF_INIT; + strbuf_addf(&buf, "+/%s%s", + strcmp("less", pager) ? "" : "*", + opt.pattern_list->pattern); + string_list_append(&path_list, buf.buf); + strbuf_detach(&buf, NULL); + } + } + + if (recurse_submodules && (!use_index || untracked)) + die(_("option not supported with --recurse-submodules.")); + + if (!show_in_pager && !opt.status_only) + setup_pager(); + + if (!use_index && (untracked || cached)) + die(_("--cached or --untracked cannot be used with --no-index.")); + + if (!use_index || untracked) { + int use_exclude = (opt_exclude < 0) ? use_index : !!opt_exclude; + hit = grep_directory(&opt, &pathspec, use_exclude, use_index); + } else if (0 <= opt_exclude) { + die(_("--[no-]exclude-standard cannot be used for tracked contents.")); + } else if (!list.nr) { + if (!cached) + setup_work_tree(); + + hit = grep_cache(&opt, &pathspec, cached); + } else { + if (cached) + die(_("both --cached and trees are given.")); + hit = grep_objects(&opt, &pathspec, &list); + } + + if (num_threads) + hit |= wait_all(); + if (hit && show_in_pager) + run_pager(&opt, prefix); + clear_pathspec(&pathspec); + free_grep_patterns(&opt); + return !hit; +} |