in builtin/grep.c [894:1292]
int cmd_grep(int argc,
const char **argv,
const char *prefix,
struct repository *repo UNUSED)
{
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_DUP;
int i;
int dummy;
int use_index = 1;
int allow_revs;
int ret;
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_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")),
OPT_SET_INT('r', "recursive", &opt.max_depth,
N_("search in subdirectories (default)"), -1),
OPT_INTEGER_F(0, "max-depth", &opt.max_depth,
N_("descend at most <n> levels"), PARSE_OPT_NONEG),
OPT_GROUP(""),
OPT_SET_INT('E', "extended-regexp", &opt.pattern_type_option,
N_("use extended POSIX regular expressions"),
GREP_PATTERN_TYPE_ERE),
OPT_SET_INT('G', "basic-regexp", &opt.pattern_type_option,
N_("use basic POSIX regular expressions (default)"),
GREP_PATTERN_TYPE_BRE),
OPT_SET_INT('F', "fixed-strings", &opt.pattern_type_option,
N_("interpret patterns as fixed strings"),
GREP_PATTERN_TYPE_FIXED),
OPT_SET_INT('P', "perl-regexp", &opt.pattern_type_option,
N_("use Perl-compatible regular expressions"),
GREP_PATTERN_TYPE_PCRE),
OPT_GROUP(""),
OPT_BOOL('n', "line-number", &opt.linenum, N_("show line numbers")),
OPT_BOOL(0, "column", &opt.columnnum, N_("show column number of first match")),
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_F('z', "null", &opt.null_following_name,
N_("print NUL after filenames"),
PARSE_OPT_NOCOMPLETE),
OPT_BOOL('o', "only-matching", &opt.only_matching,
N_("show only matching parts of a line")),
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_UNSIGNED('B', "before-context", &opt.pre_context,
N_("show <n> context lines before matches")),
OPT_UNSIGNED('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),
OPT_CALLBACK_F('e', NULL, &opt, N_("pattern"),
N_("match <pattern>"), PARSE_OPT_NONEG, pattern_callback),
OPT_CALLBACK_F(0, "and", &opt, NULL,
N_("combine patterns specified with -e"),
PARSE_OPT_NOARG | PARSE_OPT_NONEG, and_callback),
OPT_BOOL_F(0, "or", &dummy, "", PARSE_OPT_NONEG),
OPT_CALLBACK_F(0, "not", &opt, NULL, "",
PARSE_OPT_NOARG | PARSE_OPT_NONEG, not_callback),
OPT_CALLBACK_F('(', NULL, &opt, NULL, "",
PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_NODASH,
open_callback),
OPT_CALLBACK_F(')', 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")),
OPT_GROUP(""),
{
.type = OPTION_STRING,
.short_name = 'O',
.long_name = "open-files-in-pager",
.value = &show_in_pager,
.argh = N_("pager"),
.help = N_("show matching files in the pager"),
.flags = PARSE_OPT_OPTARG | PARSE_OPT_NOCOMPLETE,
.defval = (intptr_t)default_pager,
},
OPT_BOOL_F(0, "ext-grep", &external_grep_allowed__ignored,
N_("allow calling of grep(1) (ignored by this build)"),
PARSE_OPT_NOCOMPLETE),
OPT_INTEGER('m', "max-count", &opt.max_count,
N_("maximum number of results per file")),
OPT_END()
};
grep_prefix = prefix;
grep_init(&opt, the_repository);
git_config(grep_cmd_config, &opt);
/*
* 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);
if (the_repository->gitdir) {
prepare_repo_settings(the_repository);
the_repository->settings.command_requires_full_index = 0;
}
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();
}
/* Ignore --recurse-submodules if --no-index is given or implied */
if (!use_index)
recurse_submodules = 0;
/*
* 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(the_repository, 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"));
/* --only-matching has no effect with --invert. */
if (opt.invert)
opt.only_matching = 0;
/*
* 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 = {0};
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_oid_with_context(the_repository, arg,
GET_OID_RECORD_PATH,
&oid, &oc)) {
if (seen_dashdash)
die(_("unable to resolve revision: %s"), arg);
object_context_release(&oc);
break;
}
object = parse_object_or_die(the_repository, &oid, arg);
if (!seen_dashdash)
verify_non_filename(prefix, arg);
add_object_array_with_path(object, arg, &list, oc.mode, oc.path);
object_context_release(&oc);
}
/*
* 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;
pathspec.recurse_submodules = !!recurse_submodules;
if (recurse_submodules && untracked)
die(_("--untracked not supported with --recurse-submodules"));
/*
* Optimize out the case where the amount of matches is limited to zero.
* We do this to keep results consistent with GNU grep(1).
*/
if (opt.max_count == 0) {
ret = 1;
goto out;
}
if (show_in_pager) {
if (num_threads > 1)
warning(_("invalid option combination, ignoring --threads"));
num_threads = 1;
} else if (!HAVE_THREADS && num_threads > 1) {
warning(_("no threads support, ignoring --threads"));
num_threads = 1;
} else if (num_threads < 0)
die(_("invalid number of threads specified (%d)"), num_threads);
else if (num_threads == 0)
num_threads = HAVE_THREADS ? online_cpus() : 1;
if (num_threads > 1) {
if (!HAVE_THREADS)
BUG("Somebody got num_threads calculation wrong!");
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;
/*
* Pre-read gitmodules (if not read already) and force eager
* initialization of packed_git to prevent racy lazy
* reading/initialization once worker threads are started.
*/
if (recurse_submodules)
repo_read_gitmodules(the_repository, 1);
if (startup_info->have_repository)
(void)get_packed_git(the_repository);
start_threads(&opt);
} else {
/*
* The compiled patterns on the main path are only
* used when not using threading. Otherwise
* start_threads() above calls compile_grep_patterns()
* for each thread.
*/
compile_grep_patterns(&opt);
}
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_nodup(&path_list,
strbuf_detach(&buf, NULL));
}
}
if (!show_in_pager && !opt.status_only)
setup_pager(the_repository);
die_for_incompatible_opt3(!use_index, "--no-index",
untracked, "--untracked",
cached, "--cached");
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 > 1)
hit |= wait_all();
if (hit && show_in_pager)
run_pager(&opt, prefix);
ret = !hit;
out:
clear_pathspec(&pathspec);
string_list_clear(&path_list, 0);
free_grep_patterns(&opt);
object_array_clear(&list);
free_repos();
return ret;
}