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-rw-r--r--builtin/grep.c1335
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;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-27 00:28:18 +0000