mirror of
https://github.com/SerenityOS/serenity
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a8f0e489a4
POSIX allows the default streams (stdin, stdout and stderr) to be macros, which means that on such systems (musl libc is one) building Lagom will fail due to the File::std*() names. Also fix any files that use these identifiers.
215 lines
7.7 KiB
C++
215 lines
7.7 KiB
C++
/*
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* Copyright (c) 2020, Emanuel Sprung <emanuel.sprung@gmail.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/ByteBuffer.h>
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#include <AK/String.h>
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#include <AK/Utf8View.h>
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#include <AK/Vector.h>
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#include <LibCore/ArgsParser.h>
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#include <LibCore/DirIterator.h>
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#include <LibCore/File.h>
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#include <LibRegex/Regex.h>
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#include <stdio.h>
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#include <unistd.h>
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enum class BinaryFileMode {
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Binary,
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Text,
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Skip,
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};
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template<typename... Ts>
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void fail(StringView format, Ts... args)
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{
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fprintf(stderr, "\x1b[31m");
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warnln(format, forward<Ts>(args)...);
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fprintf(stderr, "\x1b[0m");
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abort();
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}
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int main(int argc, char** argv)
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{
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if (pledge("stdio rpath", nullptr) < 0) {
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perror("pledge");
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return 1;
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}
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Vector<const char*> files;
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bool recursive { false };
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bool use_ere { true };
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const char* pattern = nullptr;
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BinaryFileMode binary_mode { BinaryFileMode::Binary };
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bool case_insensitive = false;
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Core::ArgsParser args_parser;
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args_parser.add_option(recursive, "Recursively scan files starting in working directory", "recursive", 'r');
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args_parser.add_option(use_ere, "Extended regular expressions (default)", "extended-regexp", 'E');
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args_parser.add_option(pattern, "Pattern", "regexp", 'e', "Pattern");
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args_parser.add_option(case_insensitive, "Make matches case-insensitive", nullptr, 'i');
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args_parser.add_option(Core::ArgsParser::Option {
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.requires_argument = true,
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.help_string = "Action to take for binary files ([binary], text, skip)",
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.long_name = "binary-mode",
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.accept_value = [&](auto* str) {
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if (StringView { "text" } == str)
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binary_mode = BinaryFileMode::Text;
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else if (StringView { "binary" } == str)
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binary_mode = BinaryFileMode::Binary;
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else if (StringView { "skip" } == str)
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binary_mode = BinaryFileMode::Skip;
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else
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return false;
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return true;
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},
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});
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args_parser.add_option(Core::ArgsParser::Option {
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.requires_argument = false,
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.help_string = "Treat binary files as text (same as --binary-mode text)",
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.long_name = "text",
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.short_name = 'a',
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.accept_value = [&](auto) {
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binary_mode = BinaryFileMode::Text;
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return true;
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},
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});
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args_parser.add_option(Core::ArgsParser::Option {
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.requires_argument = false,
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.help_string = "Ignore binary files (same as --binary-mode skip)",
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.long_name = nullptr,
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.short_name = 'I',
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.accept_value = [&](auto) {
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binary_mode = BinaryFileMode::Skip;
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return true;
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},
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});
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args_parser.add_positional_argument(files, "File(s) to process", "file", Core::ArgsParser::Required::No);
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args_parser.parse(argc, argv);
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if (!use_ere)
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return 0;
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// mock grep behaviour: if -e is omitted, use first positional argument as pattern
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if (pattern == nullptr && files.size())
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pattern = files.take_first();
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PosixOptions options {};
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if (case_insensitive)
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options |= PosixFlags::Insensitive;
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Regex<PosixExtended> re(pattern, options);
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if (re.parser_result.error != Error::NoError) {
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return 1;
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}
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auto matches = [&](StringView str, StringView filename = "", bool print_filename = false, bool is_binary = false) {
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size_t last_printed_char_pos { 0 };
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if (is_binary && binary_mode == BinaryFileMode::Skip)
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return false;
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auto result = re.match(str, PosixFlags::Global);
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if (result.success) {
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if (is_binary && binary_mode == BinaryFileMode::Binary) {
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outln("binary file \x1B[34m{}\x1B[0m matches", filename);
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} else {
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if (result.matches.size() && print_filename) {
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out("\x1B[34m{}:\x1B[0m", filename);
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}
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for (auto& match : result.matches) {
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out("{}\x1B[32m{}\x1B[0m",
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StringView(&str[last_printed_char_pos], match.global_offset - last_printed_char_pos),
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match.view.to_string());
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last_printed_char_pos = match.global_offset + match.view.length();
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}
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outln("{}", StringView(&str[last_printed_char_pos], str.length() - last_printed_char_pos));
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}
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return true;
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}
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return false;
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};
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auto handle_file = [&matches, binary_mode](StringView filename, bool print_filename) -> bool {
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auto file = Core::File::construct(filename);
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if (!file->open(Core::IODevice::ReadOnly)) {
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warnln("Failed to open {}: {}", filename, file->error_string());
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return false;
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}
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while (file->can_read_line()) {
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auto line = file->read_line();
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auto is_binary = memchr(line.characters(), 0, line.length()) != nullptr;
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if (matches(line, filename, print_filename, is_binary) && is_binary && binary_mode == BinaryFileMode::Binary)
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return true;
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}
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return true;
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};
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auto add_directory = [&handle_file](String base, Optional<String> recursive, auto handle_directory) -> void {
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Core::DirIterator it(recursive.value_or(base), Core::DirIterator::Flags::SkipDots);
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while (it.has_next()) {
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auto path = it.next_full_path();
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if (!Core::File::is_directory(path)) {
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auto key = path.substring_view(base.length() + 1, path.length() - base.length() - 1);
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handle_file(key, true);
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} else {
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handle_directory(base, path, handle_directory);
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}
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}
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};
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if (!files.size() && !recursive) {
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auto stdin_file = Core::File::standard_input();
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for (;;) {
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auto line = stdin_file->read_line();
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bool is_binary = line.bytes().contains_slow(0);
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if (is_binary && binary_mode == BinaryFileMode::Skip)
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return 1;
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if (matches(line, "stdin", false, is_binary) && is_binary && binary_mode == BinaryFileMode::Binary)
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return 0;
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}
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} else {
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if (recursive) {
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add_directory(".", {}, add_directory);
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} else {
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bool print_filename { files.size() > 1 };
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for (auto& filename : files) {
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if (!handle_file(filename, print_filename))
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return 1;
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}
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}
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}
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return 0;
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}
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