mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-12-11 17:00:37 +00:00
388 lines
15 KiB
C++
388 lines
15 KiB
C++
/*
|
|
* Copyright (c) 2020, Emanuel Sprung <emanuel.sprung@gmail.com>
|
|
* Copyright (c) 2023, Karol Kosek <krkk@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/Assertions.h>
|
|
#include <AK/ByteString.h>
|
|
#include <AK/LexicalPath.h>
|
|
#include <AK/ScopeGuard.h>
|
|
#include <AK/StringBuilder.h>
|
|
#include <AK/URL.h>
|
|
#include <AK/Vector.h>
|
|
#include <LibCore/ArgsParser.h>
|
|
#include <LibCore/DirIterator.h>
|
|
#include <LibCore/File.h>
|
|
#include <LibCore/System.h>
|
|
#include <LibFileSystem/FileSystem.h>
|
|
#include <LibMain/Main.h>
|
|
#include <LibRegex/Regex.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
|
|
enum class BinaryFileMode {
|
|
Binary,
|
|
Text,
|
|
Skip,
|
|
};
|
|
|
|
enum class ExitStatus {
|
|
SomethingMatched = 0,
|
|
NoLinesMatched = 1,
|
|
ErrorOccurred = 2, // NOTE: `-q` flag also silences errors.
|
|
};
|
|
|
|
template<typename... Ts>
|
|
void fail(StringView format, Ts... args)
|
|
{
|
|
warn("\x1b[31m");
|
|
warnln(format, forward<Ts>(args)...);
|
|
warn("\x1b[0m");
|
|
abort();
|
|
}
|
|
|
|
constexpr StringView ere_special_characters = ".^$*+?()[{\\|"sv;
|
|
constexpr StringView basic_special_characters = ".^$*[\\"sv;
|
|
|
|
static ByteString escape_characters(StringView string, StringView characters)
|
|
{
|
|
StringBuilder builder;
|
|
for (auto ch : string) {
|
|
if (characters.contains(ch))
|
|
builder.append('\\');
|
|
|
|
builder.append(ch);
|
|
}
|
|
return builder.to_byte_string();
|
|
}
|
|
|
|
static ByteString& hostname()
|
|
{
|
|
static ByteString s_hostname;
|
|
if (s_hostname.is_empty()) {
|
|
auto result = Core::System::gethostname();
|
|
if (result.is_error())
|
|
s_hostname = "localhost";
|
|
else
|
|
s_hostname = result.release_value();
|
|
}
|
|
return s_hostname;
|
|
}
|
|
|
|
enum class PrintType {
|
|
Path = 1 << 0,
|
|
LineNumbers = 1 << 1,
|
|
};
|
|
AK_ENUM_BITWISE_OPERATORS(PrintType)
|
|
|
|
static void append_formatted_path(StringBuilder& builder, StringView path, Optional<size_t> line_number, PrintType print_type, bool with_hyperlinks, bool with_color)
|
|
{
|
|
if (path == '-') {
|
|
path = "(standard input)"sv;
|
|
with_hyperlinks = false;
|
|
}
|
|
|
|
if (with_hyperlinks) {
|
|
auto full_path_or_error = FileSystem::real_path(path);
|
|
if (!full_path_or_error.is_error()) {
|
|
auto fullpath = full_path_or_error.release_value();
|
|
auto url = URL::create_with_file_scheme(fullpath, {}, hostname());
|
|
if (has_flag(print_type, PrintType::LineNumbers) && line_number.has_value())
|
|
url.set_query(MUST(String::formatted("line_number={}", *line_number)));
|
|
builder.appendff("\033]8;;{}\033\\", url.serialize());
|
|
}
|
|
}
|
|
if (has_flag(print_type, PrintType::Path)) {
|
|
if (with_color)
|
|
builder.appendff("\033[34m{}\033[39m", path);
|
|
else
|
|
builder.append(path);
|
|
}
|
|
if (has_flag(print_type, PrintType::LineNumbers) && line_number.has_value()) {
|
|
if (has_flag(print_type, PrintType::Path))
|
|
builder.append(':');
|
|
|
|
if (with_color)
|
|
builder.appendff("\033[35m{}\033[39m", *line_number);
|
|
else
|
|
builder.appendff("{}", *line_number);
|
|
}
|
|
if (with_hyperlinks)
|
|
builder.append("\033]8;;\033\\"sv);
|
|
}
|
|
|
|
ErrorOr<int> serenity_main(Main::Arguments args)
|
|
{
|
|
TRY(Core::System::pledge("stdio rpath"));
|
|
|
|
ByteString program_name = AK::LexicalPath::basename(args.strings[0]);
|
|
|
|
Vector<ByteString> files;
|
|
|
|
bool recursive = (program_name == "rgrep"sv);
|
|
bool use_ere = (program_name == "egrep"sv);
|
|
bool fixed_strings = (program_name == "fgrep"sv);
|
|
Vector<ByteString> patterns;
|
|
StringView pattern_file;
|
|
BinaryFileMode binary_mode { BinaryFileMode::Binary };
|
|
bool case_insensitive = false;
|
|
bool line_numbers = false;
|
|
bool invert_match = false;
|
|
bool quiet_mode = false;
|
|
bool suppress_errors = false;
|
|
bool is_a_tty = isatty(STDOUT_FILENO) == 1;
|
|
bool colored_output = is_a_tty;
|
|
bool disable_hyperlinks = !is_a_tty;
|
|
bool count_lines = false;
|
|
|
|
size_t matched_line_count = 0;
|
|
|
|
Core::ArgsParser args_parser;
|
|
args_parser.add_option(recursive, "Recursively scan files", "recursive", 'r');
|
|
args_parser.add_option(use_ere, "Extended regular expressions", "extended-regexp", 'E');
|
|
args_parser.add_option(fixed_strings, "Treat pattern as a string, not a regexp", "fixed-strings", 'F');
|
|
args_parser.add_option(Core::ArgsParser::Option {
|
|
.argument_mode = Core::ArgsParser::OptionArgumentMode::Required,
|
|
.help_string = "Pattern",
|
|
.long_name = "regexp",
|
|
.short_name = 'e',
|
|
.value_name = "Pattern",
|
|
.accept_value = [&](StringView str) {
|
|
patterns.append(str);
|
|
return true;
|
|
},
|
|
});
|
|
args_parser.add_option(Core::ArgsParser::Option {
|
|
.argument_mode = Core::ArgsParser::OptionArgumentMode::Required,
|
|
.help_string = "Read patterns from a file",
|
|
.long_name = "file",
|
|
.short_name = 'f',
|
|
.value_name = "File",
|
|
.accept_value = [&](StringView str) {
|
|
pattern_file = str;
|
|
return true;
|
|
},
|
|
});
|
|
args_parser.add_option(case_insensitive, "Make matches case-insensitive", nullptr, 'i');
|
|
args_parser.add_option(line_numbers, "Output line-numbers", "line-numbers", 'n');
|
|
args_parser.add_option(invert_match, "Select non-matching lines", "invert-match", 'v');
|
|
args_parser.add_option(quiet_mode, "Do not write anything to standard output", "quiet", 'q');
|
|
args_parser.add_option(suppress_errors, "Suppress error messages for nonexistent or unreadable files", "no-messages", 's');
|
|
args_parser.add_option(Core::ArgsParser::Option {
|
|
.argument_mode = Core::ArgsParser::OptionArgumentMode::Required,
|
|
.help_string = "Action to take for binary files ([binary], text, skip)",
|
|
.long_name = "binary-mode",
|
|
.accept_value = [&](StringView str) {
|
|
if ("text"sv == str)
|
|
binary_mode = BinaryFileMode::Text;
|
|
else if ("binary"sv == str)
|
|
binary_mode = BinaryFileMode::Binary;
|
|
else if ("skip"sv == str)
|
|
binary_mode = BinaryFileMode::Skip;
|
|
else
|
|
return false;
|
|
return true;
|
|
},
|
|
});
|
|
args_parser.add_option(binary_mode, BinaryFileMode::Text, "Treat binary files as text (same as --binary-mode text)", "text", 'a');
|
|
args_parser.add_option(binary_mode, BinaryFileMode::Skip, "Ignore binary files (same as --binary-mode skip)", nullptr, 'I');
|
|
args_parser.add_option(Core::ArgsParser::Option {
|
|
.argument_mode = Core::ArgsParser::OptionArgumentMode::Required,
|
|
.help_string = "When to use colored output for the matching text ([auto], never, always)",
|
|
.long_name = "color",
|
|
.short_name = 0,
|
|
.value_name = "WHEN",
|
|
.accept_value = [&](StringView str) {
|
|
if ("never"sv == str)
|
|
colored_output = false;
|
|
else if ("always"sv == str)
|
|
colored_output = true;
|
|
else if ("auto"sv != str)
|
|
return false;
|
|
return true;
|
|
},
|
|
});
|
|
args_parser.add_option(disable_hyperlinks, "Disable hyperlinks", "no-hyperlinks", 0);
|
|
args_parser.add_option(count_lines, "Output line count instead of line contents", "count", 'c');
|
|
args_parser.add_positional_argument(files, "File(s) to process", "file", Core::ArgsParser::Required::No);
|
|
args_parser.parse(args);
|
|
|
|
if (!pattern_file.is_empty()) {
|
|
auto file = TRY(Core::File::open(pattern_file, Core::File::OpenMode::Read));
|
|
auto buffered_file = TRY(Core::InputBufferedFile::create(move(file)));
|
|
Array<u8, PAGE_SIZE> buffer;
|
|
while (!buffered_file->is_eof()) {
|
|
auto next_pattern = TRY(buffered_file->read_line(buffer));
|
|
// Empty lines represent a valid pattern, but the trailing newline
|
|
// should be ignored.
|
|
if (next_pattern.is_empty() && buffered_file->is_eof())
|
|
break;
|
|
patterns.append(next_pattern.to_byte_string());
|
|
}
|
|
}
|
|
|
|
// mock grep behavior: if -e is omitted, use first positional argument as pattern
|
|
if (patterns.size() == 0 && files.size())
|
|
patterns.append(files.take_first());
|
|
|
|
auto user_has_specified_files = !files.is_empty();
|
|
|
|
PosixOptions options {};
|
|
if (case_insensitive)
|
|
options |= PosixFlags::Insensitive;
|
|
|
|
auto grep_logic = [&](auto&& regular_expressions) {
|
|
for (auto& re : regular_expressions) {
|
|
if (re.parser_result.error != regex::Error::NoError) {
|
|
warnln("regex parse error: {}", regex::get_error_string(re.parser_result.error));
|
|
return ExitStatus::ErrorOccurred;
|
|
}
|
|
}
|
|
|
|
auto matches = [&](StringView str, StringView filename, size_t line_number, bool print_filename, bool is_binary) {
|
|
size_t last_printed_char_pos { 0 };
|
|
if (is_binary && binary_mode == BinaryFileMode::Skip)
|
|
return false;
|
|
|
|
for (auto& re : regular_expressions) {
|
|
auto result = re.match(str, PosixFlags::Global);
|
|
if (!(result.success ^ invert_match))
|
|
continue;
|
|
|
|
if (quiet_mode)
|
|
return true;
|
|
|
|
if (count_lines) {
|
|
matched_line_count++;
|
|
return true;
|
|
}
|
|
|
|
if (is_binary && binary_mode == BinaryFileMode::Binary) {
|
|
StringBuilder filename_builder;
|
|
append_formatted_path(filename_builder, filename, {}, PrintType::Path, !disable_hyperlinks, colored_output);
|
|
outln("binary file {} matches"sv, filename_builder.string_view());
|
|
} else {
|
|
PrintType print_type { 0 };
|
|
if (print_filename)
|
|
print_type |= PrintType::Path;
|
|
if (line_numbers)
|
|
print_type |= PrintType::LineNumbers;
|
|
|
|
if ((result.matches.size() || invert_match) && has_any_flag(print_type, PrintType::Path | PrintType::LineNumbers)) {
|
|
StringBuilder filename_builder;
|
|
append_formatted_path(filename_builder, filename, line_number, print_type, !disable_hyperlinks, colored_output);
|
|
out("{}:"sv, filename_builder.string_view());
|
|
}
|
|
|
|
for (auto& match : result.matches) {
|
|
auto pre_match_length = match.global_offset - last_printed_char_pos;
|
|
out(colored_output ? "{}\x1B[32m{}\x1B[0m"sv : "{}{}"sv,
|
|
pre_match_length > 0 ? StringView(&str[last_printed_char_pos], pre_match_length) : ""sv,
|
|
match.view.to_byte_string());
|
|
last_printed_char_pos = match.global_offset + match.view.length();
|
|
}
|
|
auto remaining_length = str.length() - last_printed_char_pos;
|
|
outln("{}", remaining_length > 0 ? StringView(&str[last_printed_char_pos], remaining_length) : ""sv);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
};
|
|
|
|
auto exit_status = ExitStatus::NoLinesMatched;
|
|
|
|
auto handle_file = [&matches, binary_mode, count_lines, quiet_mode, disable_hyperlinks, colored_output,
|
|
&matched_line_count, &exit_status](StringView filename, bool print_filename) -> ErrorOr<void> {
|
|
auto file = TRY(Core::File::open_file_or_standard_stream(filename, Core::File::OpenMode::Read));
|
|
auto buffered_file = TRY(Core::InputBufferedFile::create(move(file)));
|
|
|
|
for (size_t line_number = 1; TRY(buffered_file->can_read_line()); ++line_number) {
|
|
Array<u8, PAGE_SIZE> buffer;
|
|
auto line = TRY(buffered_file->read_line(buffer));
|
|
|
|
auto is_binary = line.contains('\0');
|
|
|
|
auto matched = matches(line, filename, line_number, print_filename, is_binary);
|
|
if (matched) {
|
|
if (exit_status == ExitStatus::NoLinesMatched)
|
|
exit_status = ExitStatus::SomethingMatched;
|
|
if (is_binary && binary_mode == BinaryFileMode::Binary)
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (count_lines && !quiet_mode) {
|
|
if (print_filename) {
|
|
StringBuilder filename_builder;
|
|
append_formatted_path(filename_builder, filename, {}, PrintType::Path, !disable_hyperlinks, colored_output);
|
|
out("{}:", filename_builder.string_view());
|
|
}
|
|
outln("{}", matched_line_count);
|
|
matched_line_count = 0;
|
|
}
|
|
|
|
return {};
|
|
};
|
|
|
|
auto add_directory = [&handle_file, &exit_status, user_has_specified_files, suppress_errors](ByteString base, Optional<ByteString> recursive, auto handle_directory) -> void {
|
|
Core::DirIterator it(recursive.value_or(base), Core::DirIterator::Flags::SkipDots);
|
|
while (it.has_next()) {
|
|
auto path = it.next_full_path();
|
|
if (!FileSystem::is_directory(path)) {
|
|
// Remove leading './' when `grep -r` was run without any specified paths.
|
|
auto key = user_has_specified_files ? path.view() : path.substring_view(base.length() + 1);
|
|
if (auto result = handle_file(key, true); result.is_error() && !suppress_errors) {
|
|
warnln("Failed with file {}: {}", key, result.release_error());
|
|
exit_status = ExitStatus::ErrorOccurred;
|
|
}
|
|
|
|
} else {
|
|
handle_directory(base, path, handle_directory);
|
|
}
|
|
}
|
|
};
|
|
|
|
if (recursive) {
|
|
if (!user_has_specified_files)
|
|
files.append("."sv);
|
|
|
|
for (auto& filename : files) {
|
|
add_directory(filename, {}, add_directory);
|
|
}
|
|
} else {
|
|
if (!user_has_specified_files)
|
|
files.append("-"sv);
|
|
|
|
bool print_filename { files.size() > 1 };
|
|
for (auto& filename : files) {
|
|
auto result = handle_file(filename, print_filename);
|
|
if (result.is_error() && !suppress_errors) {
|
|
warnln("Failed with file {}: {}", filename, result.release_error());
|
|
exit_status = ExitStatus::ErrorOccurred;
|
|
}
|
|
}
|
|
}
|
|
|
|
return exit_status;
|
|
};
|
|
|
|
if (use_ere) {
|
|
Vector<Regex<PosixExtended>> regular_expressions;
|
|
for (auto pattern : patterns) {
|
|
auto escaped_pattern = (fixed_strings) ? escape_characters(pattern, ere_special_characters) : pattern;
|
|
regular_expressions.append(Regex<PosixExtended>(escaped_pattern, options));
|
|
}
|
|
return to_underlying(grep_logic(regular_expressions));
|
|
}
|
|
|
|
Vector<Regex<PosixBasic>> regular_expressions;
|
|
for (auto pattern : patterns) {
|
|
auto escaped_pattern = (fixed_strings) ? escape_characters(pattern, basic_special_characters) : pattern;
|
|
regular_expressions.append(Regex<PosixBasic>(escaped_pattern, options));
|
|
}
|
|
return to_underlying(grep_logic(regular_expressions));
|
|
}
|