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Userland: Implement grep -v (invert-match)

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This will make grep output every line that doesn't have
any matches of the given regular expression
This commit is contained in:
Andrew Kaster 2021-01-23 22:11:19 -07:00 • committed by Andreas Kling
parent 036828ff43
commit 258a3b27ac
1 changed files with 4 additions and 2 deletions
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6
Userland/Utilities/grep.cpp
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@ -65,12 +65,14 @@ int main(int argc, char** argv)
const char* pattern = nullptr;
BinaryFileMode binary_mode { BinaryFileMode::Binary };
bool case_insensitive = false;
bool invert_match = false;
Core::ArgsParser args_parser;
args_parser.add_option(recursive, "Recursively scan files starting in working directory", "recursive", 'r');
args_parser.add_option(use_ere, "Extended regular expressions (default)", "extended-regexp", 'E');
args_parser.add_option(pattern, "Pattern", "regexp", 'e', "Pattern");
args_parser.add_option(case_insensitive, "Make matches case-insensitive", nullptr, 'i');
args_parser.add_option(invert_match, "Select non-matching lines", "invert-match", 'v');
args_parser.add_option(Core::ArgsParser::Option {
.requires_argument = true,
.help_string = "Action to take for binary files ([binary], text, skip)",
@ -132,11 +134,11 @@ int main(int argc, char** argv)
return false;
auto result = re.match(str, PosixFlags::Global);
if (result.success) {
if (result.success ^ invert_match) {
if (is_binary && binary_mode == BinaryFileMode::Binary) {
outln("binary file \x1B[34m{}\x1B[0m matches", filename);
} else {
if (result.matches.size() && print_filename) {
if ((result.matches.size() || invert_match) && print_filename) {
out("\x1B[34m{}:\x1B[0m", filename);
}