hhpack/getopt

Option parsing in Hack

getopt

, _(*1)

Basic usage

The method of parsing command line arguments is as follows.
Define an option that takes no arguments, use the on function.
Define an option to take one argument, use the take_on function., _(*2)

use HHPack\Getopt as cli;

final class Options {
    public bool $help = false;
    public bool $version = false;
    public string $fileName = 'test';
}

$options = new Options();

$parser = cli\optparser([
    cli\take_on([ '-n', '--name' ], 'NAME', 'file name', ($name) ==> { $options->fileName = $name; }),
    cli\on([ '-h', '--help' ], 'display help message', () ==> { $options->help = true; }),
    cli\on([ '-v', '--version' ], 'display version', () ==> { $options->version = true; })
]);

$args = $parser->parse($argv);

if ($options->help === true) {
    echo 'help on', PHP_EOL;
}

if ($options->version === true) {
    echo 'version on', PHP_EOL;
}

if ($options->fileName !== 'test') {
    echo 'name = ', $fileName, PHP_EOL;
}

CLI Application

If you want to create cli application, we recommend using ArgumentParser.
ArgumentParser implements an interface to display usage, program version., _(*3)

use HHPack\Getopt as cli;
use HHPack\Getopt\App\{ ArgumentParser };

final class CliApplication
{

    private bool $help = false;
    private bool $version = false;
    private string $fileName = 'test';
    private ArgumentParser $argParser;

    public function __construct()
    {
        $this->argParser = cli\app('example', '1.0.0')
            ->description("This cli application is example.\n\n")
            ->usage("  {app.name} [OPTIONS]\n\n")
            ->options([
                cli\on(['-h', '--help'], 'display help message', () ==> {
                    $this->help = true;
                }),
                cli\on(['-v', '--version'], 'display version', () ==> {
                    $this->version = true;
                }),
                cli\take_on(['-n', '--name'], 'NAME', 'file name', ($name) ==> {
                    $this->fileName = $name;
                })
            ]);
    }

    public function run(Traversable<string> $argv): void
    {
        $this->argParser->parse($argv);

        if ($this->help) {
            $this->argParser->displayHelp();
        } else if ($this->version) {
            $this->argParser->displayVersion();
        } else {
            echo "file name: ", $this->fileName, PHP_EOL;
        }
    }
}

(new CliApplication())->run($argv);

Run the test

composer install
composer test