README

This library provides basic command-line handling, including:

parsing of ARGV
interactive TTY detection
color TTY detection

It aims for as much code as possible to be in strict mode.

Installation

hhvm composer.phar require facebook/hh-clilib

Examples

In src/MyCLI.hh:

// MyCLI.hh <?hh // strict use type Facebook\CLILib\CLIBase; final class MyCLI extends CLIBase { <<__Override>> public async function mainAsync(): Awaitable<int> { $this->getStdout()->write("Hello, world!"); return 0; } }

In bin/mycli:

<?hh // not strict because of top-level statements. require_once(__DIR__.'/../vendor/hh_autoload.php'); MyCLI::main();

Options

Options are optional, always have a long form (e.g. --foo), may have a short form (e.g. -f), and may require a value (e.g. --foo=bar or --foo bar).

You can specify supported options by implemented getSupportedOptions(); --help is always supported.

<<__Override>> protected function getSupportedOptions(): vec<CLIOptions\CLIOption> { return vec[ CLIOptions\flag( () ==> { $this->verbosity++; }, "Increase output verbosity", '--verbose', '-v', ), CLIOptions\with_required_enum( OutputFormat::class, $f ==> { $this->format = $f; }, Str\format( "Desired output format (%s). Default: %s", Str\join(OutputFormat::getValues(), '|'), (string) $this->format, ), '--format', '-f', ), CLIOptions\with_required_string( $s ==> { $this->outputRoot = $s; }, "Directory for output files. Default: working directory", '--output', '-o', ), ]; }