1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 15:07:45 +00:00

Userland+AK: Stop using getopt() for ArgsParser

This commit moves the implementation of getopt into AK, and converts its
API to understand and use StringView instead of char*.
Everything else is caught in the crossfire of making
Option::accept_value() take a StringView instead of a char const*.

With this, we must now pass a Span<StringView> to ArgsParser::parse(),
applications using LibMain are unaffected, but anything not using that
or taking its own argc/argv has to construct a Vector<StringView> for
this method.
This commit is contained in:
Ali Mohammad Pur 2023-02-21 15:14:41 +03:30 committed by Ali Mohammad Pur
parent b2b851b361
commit db886fe18b
43 changed files with 673 additions and 584 deletions

View file

@ -7,24 +7,15 @@
#include <AK/Format.h>
#include <AK/JsonObject.h>
#include <AK/OptionParser.h>
#include <AK/StringBuilder.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/Version.h>
#include <getopt.h>
#include <limits.h>
#include <math.h>
#include <stdio.h>
#include <string.h>
static Optional<double> convert_to_double(char const* s)
{
char* p;
double v = strtod(s, &p);
if (isnan(v) || p == s)
return {};
return v;
}
namespace Core {
ArgsParser::ArgsParser()
@ -34,16 +25,18 @@ ArgsParser::ArgsParser()
add_option(m_perform_autocomplete, "Perform autocompletion", "complete", 0, OptionHideMode::CommandLineAndMarkdown);
}
bool ArgsParser::parse(int argc, char* const* argv, FailureBehavior failure_behavior)
bool ArgsParser::parse(Span<StringView> arguments, FailureBehavior failure_behavior)
{
auto fail = [this, argv, failure_behavior] {
auto fail = [this, name = arguments[0], failure_behavior] {
if (failure_behavior == FailureBehavior::PrintUsage || failure_behavior == FailureBehavior::PrintUsageAndExit)
print_usage(stderr, argv[0]);
print_usage(stderr, name);
if (failure_behavior == FailureBehavior::Exit || failure_behavior == FailureBehavior::PrintUsageAndExit)
exit(1);
};
Vector<option> long_options;
OptionParser parser;
Vector<OptionParser::Option> long_options;
StringBuilder short_options_builder;
if (m_stop_on_first_non_option)
@ -51,16 +44,16 @@ bool ArgsParser::parse(int argc, char* const* argv, FailureBehavior failure_beha
int index_of_found_long_option = -1;
// Tell getopt() to reset its internal state, and start scanning from optind = 1.
// We could also set optreset = 1, but the host platform may not support that.
optind = 0;
for (size_t i = 0; i < m_options.size(); i++) {
auto& opt = m_options[i];
if (opt.long_name) {
option long_opt {
opt.long_name,
opt.argument_mode == OptionArgumentMode::Required ? required_argument : (opt.argument_mode == OptionArgumentMode::Optional ? optional_argument : no_argument),
OptionParser::Option long_opt {
{ opt.long_name, strlen(opt.long_name) },
opt.argument_mode == OptionArgumentMode::Required
? OptionParser::ArgumentRequirement::HasRequiredArgument
: opt.argument_mode == OptionArgumentMode::Optional
? OptionParser::ArgumentRequirement::HasOptionalArgument
: OptionParser::ArgumentRequirement::NoArgument,
&index_of_found_long_option,
static_cast<int>(i)
};
@ -75,16 +68,20 @@ bool ArgsParser::parse(int argc, char* const* argv, FailureBehavior failure_beha
short_options_builder.append(':');
}
}
long_options.append({ 0, 0, 0, 0 });
auto short_options = short_options_builder.to_deprecated_string();
size_t option_index = 1;
while (true) {
int c = getopt_long(argc, argv, short_options.characters(), long_options.data(), nullptr);
auto result = parser.getopt(arguments.slice(1), short_options, long_options, {});
option_index += result.consumed_args;
auto c = result.result;
if (c == -1) {
// We have reached the end.
break;
} else if (c == '?') {
}
if (c == '?') {
// There was an error, and getopt() has already
// printed its error message.
fail();
@ -106,7 +103,7 @@ bool ArgsParser::parse(int argc, char* const* argv, FailureBehavior failure_beha
}
VERIFY(found_option);
char const* arg = found_option->argument_mode != OptionArgumentMode::None ? optarg : nullptr;
StringView arg = found_option->argument_mode != OptionArgumentMode::None ? result.optarg_value.value_or({}) : StringView {};
if (!found_option->accept_value(arg)) {
warnln("\033[31mInvalid value for option \033[1m{}\033[22m\033[0m", found_option->name_for_display());
fail();
@ -125,14 +122,14 @@ bool ArgsParser::parse(int argc, char* const* argv, FailureBehavior failure_beha
}
if (m_show_help) {
print_usage(stdout, argv[0]);
print_usage(stdout, arguments[0]);
if (failure_behavior == FailureBehavior::Exit || failure_behavior == FailureBehavior::PrintUsageAndExit)
exit(0);
return false;
}
if (m_perform_autocomplete) {
autocomplete(stdout, { argv[0], strlen(argv[0]) }, ReadonlySpan<char const*> { argv + optind, static_cast<size_t>(argc - optind) });
autocomplete(stdout, arguments[0], arguments.slice(option_index));
if (failure_behavior == FailureBehavior::Exit || failure_behavior == FailureBehavior::PrintUsageAndExit)
exit(0);
return false;
@ -140,7 +137,7 @@ bool ArgsParser::parse(int argc, char* const* argv, FailureBehavior failure_beha
// Now let's parse positional arguments.
int values_left = argc - optind;
int values_left = arguments.size() - option_index;
Vector<int, 16> num_values_for_arg;
num_values_for_arg.resize(m_positional_args.size(), true);
int total_values_required = 0;
@ -174,7 +171,7 @@ bool ArgsParser::parse(int argc, char* const* argv, FailureBehavior failure_beha
for (size_t i = 0; i < m_positional_args.size(); i++) {
auto& arg = m_positional_args[i];
for (int j = 0; j < num_values_for_arg[i]; j++) {
char const* value = argv[optind++];
StringView value = arguments[option_index++];
if (!arg.accept_value(value)) {
warnln("Invalid value for argument {}", arg.name);
fail();
@ -186,7 +183,7 @@ bool ArgsParser::parse(int argc, char* const* argv, FailureBehavior failure_beha
return true;
}
void ArgsParser::print_usage(FILE* file, char const* argv0)
void ArgsParser::print_usage(FILE* file, StringView argv0)
{
char const* env_preference = getenv("ARGSPARSER_EMIT_MARKDOWN");
if (env_preference != nullptr && env_preference[0] == '1' && env_preference[1] == 0) {
@ -196,7 +193,7 @@ void ArgsParser::print_usage(FILE* file, char const* argv0)
}
}
void ArgsParser::print_usage_terminal(FILE* file, char const* argv0)
void ArgsParser::print_usage_terminal(FILE* file, StringView argv0)
{
out(file, "Usage:\n\t\033[1m{}\033[0m", argv0);
@ -272,7 +269,7 @@ void ArgsParser::print_usage_terminal(FILE* file, char const* argv0)
}
}
void ArgsParser::print_usage_markdown(FILE* file, char const* argv0)
void ArgsParser::print_usage_markdown(FILE* file, StringView argv0)
{
outln(file, "## Name\n\n{}", argv0);
@ -383,7 +380,7 @@ void ArgsParser::add_ignored(char const* long_name, char short_name, OptionHideM
long_name,
short_name,
nullptr,
[](char const*) {
[](StringView) {
return true;
},
hide_mode,
@ -399,8 +396,8 @@ void ArgsParser::add_option(bool& value, char const* help_string, char const* lo
long_name,
short_name,
nullptr,
[&value](char const* s) {
VERIFY(s == nullptr);
[&value](StringView s) {
VERIFY(s.is_empty());
value = true;
return true;
},
@ -417,8 +414,9 @@ void ArgsParser::add_option(char const*& value, char const* help_string, char co
long_name,
short_name,
value_name,
[&value](char const* s) {
value = s;
[&value](StringView s) {
VERIFY(s.length() == strlen(s.characters_without_null_termination()));
value = s.characters_without_null_termination();
return true;
},
hide_mode,
@ -434,7 +432,7 @@ void ArgsParser::add_option(DeprecatedString& value, char const* help_string, ch
long_name,
short_name,
value_name,
[&value](char const* s) {
[&value](StringView s) {
value = s;
return true;
},
@ -451,8 +449,8 @@ void ArgsParser::add_option(StringView& value, char const* help_string, char con
long_name,
short_name,
value_name,
[&value](char const* s) {
value = { s, strlen(s) };
[&value](StringView s) {
value = s;
return true;
},
hide_mode,
@ -469,8 +467,7 @@ void ArgsParser::add_option(I& value, char const* help_string, char const* long_
long_name,
short_name,
value_name,
[&value](char const* s) {
auto view = StringView { s, strlen(s) };
[&value](StringView view) {
Optional<I> opt;
if constexpr (IsSigned<I>)
opt = view.to_int<I>();
@ -499,8 +496,8 @@ void ArgsParser::add_option(double& value, char const* help_string, char const*
long_name,
short_name,
value_name,
[&value](char const* s) {
auto opt = convert_to_double(s);
[&value](StringView s) {
auto opt = s.to_double();
value = opt.value_or(0.0);
return opt.has_value();
},
@ -517,8 +514,8 @@ void ArgsParser::add_option(Optional<double>& value, char const* help_string, ch
long_name,
short_name,
value_name,
[&value](char const* s) {
value = convert_to_double(s);
[&value](StringView s) {
value = s.to_double();
return value.has_value();
},
hide_mode,
@ -534,8 +531,8 @@ void ArgsParser::add_option(Optional<size_t>& value, char const* help_string, ch
long_name,
short_name,
value_name,
[&value](char const* s) {
value = AK::StringUtils::convert_to_uint<size_t>({ s, strlen(s) });
[&value](StringView s) {
value = AK::StringUtils::convert_to_uint<size_t>(s);
return value.has_value();
},
hide_mode,
@ -551,10 +548,10 @@ void ArgsParser::add_option(Vector<size_t>& values, char const* help_string, cha
long_name,
short_name,
value_name,
[&values, separator](char const* s) {
[&values, separator](StringView s) {
bool parsed_all_values = true;
StringView { s, strlen(s) }.for_each_split_view(separator, SplitBehavior::Nothing, [&](auto value) {
s.for_each_split_view(separator, SplitBehavior::Nothing, [&](auto value) {
if (auto maybe_value = AK::StringUtils::convert_to_uint<size_t>(value); maybe_value.has_value())
values.append(*maybe_value);
else
@ -577,9 +574,8 @@ void ArgsParser::add_option(Vector<DeprecatedString>& values, char const* help_s
long_name,
short_name,
value_name,
[&values](char const* s) {
DeprecatedString value = s;
values.append(value);
[&values](StringView s) {
values.append(s);
return true;
},
hide_mode
@ -600,8 +596,9 @@ void ArgsParser::add_positional_argument(char const*& value, char const* help_st
name,
required == Required::Yes ? 1 : 0,
1,
[&value](char const* s) {
value = s;
[&value](StringView s) {
VERIFY(s.length() == strlen(s.characters_without_null_termination()));
value = s.characters_without_null_termination();
return true;
}
};
@ -615,7 +612,7 @@ void ArgsParser::add_positional_argument(DeprecatedString& value, char const* he
name,
required == Required::Yes ? 1 : 0,
1,
[&value](char const* s) {
[&value](StringView s) {
value = s;
return true;
}
@ -630,8 +627,8 @@ void ArgsParser::add_positional_argument(StringView& value, char const* help_str
name,
required == Required::Yes ? 1 : 0,
1,
[&value](char const* s) {
value = { s, strlen(s) };
[&value](StringView s) {
value = s;
return true;
}
};
@ -645,8 +642,8 @@ void ArgsParser::add_positional_argument(int& value, char const* help_string, ch
name,
required == Required::Yes ? 1 : 0,
1,
[&value](char const* s) {
auto opt = StringView { s, strlen(s) }.to_int();
[&value](StringView s) {
auto opt = s.to_int();
value = opt.value_or(0);
return opt.has_value();
}
@ -661,8 +658,8 @@ void ArgsParser::add_positional_argument(unsigned& value, char const* help_strin
name,
required == Required::Yes ? 1 : 0,
1,
[&value](char const* s) {
auto opt = StringView { s, strlen(s) }.to_uint();
[&value](StringView s) {
auto opt = s.to_uint();
value = opt.value_or(0);
return opt.has_value();
}
@ -677,8 +674,8 @@ void ArgsParser::add_positional_argument(double& value, char const* help_string,
name,
required == Required::Yes ? 1 : 0,
1,
[&value](char const* s) {
auto opt = convert_to_double(s);
[&value](StringView s) {
auto opt = s.to_double();
value = opt.value_or(0.0);
return opt.has_value();
}
@ -693,8 +690,9 @@ void ArgsParser::add_positional_argument(Vector<char const*>& values, char const
name,
required == Required::Yes ? 1 : 0,
INT_MAX,
[&values](char const* s) {
values.append(s);
[&values](StringView s) {
VERIFY(s.length() == strlen(s.characters_without_null_termination()));
values.append(s.characters_without_null_termination());
return true;
}
};
@ -708,7 +706,7 @@ void ArgsParser::add_positional_argument(Vector<DeprecatedString>& values, char
name,
required == Required::Yes ? 1 : 0,
INT_MAX,
[&values](char const* s) {
[&values](StringView s) {
values.append(s);
return true;
}
@ -723,15 +721,15 @@ void ArgsParser::add_positional_argument(Vector<StringView>& values, char const*
name,
required == Required::Yes ? 1 : 0,
INT_MAX,
[&values](char const* s) {
values.append({ s, strlen(s) });
[&values](StringView s) {
values.append(s);
return true;
}
};
add_positional_argument(move(arg));
}
void ArgsParser::autocomplete(FILE* file, StringView program_name, ReadonlySpan<char const*> remaining_arguments)
void ArgsParser::autocomplete(FILE* file, StringView program_name, ReadonlySpan<StringView> remaining_arguments)
{
// We expect the full invocation of the program to be available as positional args,
// e.g. `foo --bar arg -b` (program invoked as `foo --complete -- foo --bar arg -b`)
@ -743,9 +741,7 @@ void ArgsParser::autocomplete(FILE* file, StringView program_name, ReadonlySpan<
StringView option_to_complete;
auto completing_option = false;
for (auto& arg : remaining_arguments) {
StringView argument { arg, strlen(arg) };
for (auto& argument : remaining_arguments) {
completing_option = false;
if (skip_next) {
argument_to_complete = argument;