Command

Overview

Command is a powerful and flexible command-line interface (CLI) base built with TypeScript. It is built on top of the commander library to provide a robust framework for creating and managing commands, options, and arguments. This application is designed to be highly customizable and extendable, making it suitable for a wide range of use cases.

Features

• Command Management: Easily create, configure, and manage commands with support for subcommands.
• Options and Arguments: Define and handle options and arguments with ease, including support for global options.
• Help System: Customizable help documentation for commands, options, and arguments.
• Colorized Output: Enhanced terminal output with color support using the chalk library.
• Autocomplete: Built-in support for command and option autocompletion.
• Logging: Integrated logging with pino for detailed and configurable logging.
• Error Handling: Robust error handling and reporting.
• Input/Output: Helpers for reading and printing to the console. Adhering to silent/no-interaction/no-color flags

Installation

To install Command, use the following command:

npm install @radicjs/command

Usage

Commands should be defined in the wrapper function run which is exported by the package. The resulting function should be exported as the default export of the file.

import { run } from '@radicjs/command';

export default run(app =>
    app.program
       .name('foo')
       .description('A test command')
       .action(async function () {
           this.out.t`{green All set!}`
           this.log.debug('All these work out of the box');
       }),
);

Default Global Options

By default, the following global options are available:

• -h, --help: Display help for command.
• --log-level <level>: Set log level (default: warn).
• -v, --verbose: Enables verbose output.
• --debug: Enable debugging output.
• --no-interaction: No interaction.
• --silent: Disable output.
• --no-color: Disable color output.

Custom global options

Create a new file run.ts, wich will then serve as the wrapper for your commands.

import { run as _run, gopts } from '../src';

export const run: typeof _run = (...args) => {
    // either clear all options
    gopts.clearOptions();
    // or remove some options
    gopts.removeOption('help');

    // then add some options. the GlobalOptionsCommand has this helper method to add the global options
    gopts.add('-v, --version','output the version number',false).conflicts('V');


    return _run(...args)
}

Help improvements

command.configureHelp({
    // enabled by default. Must be set to true for the options below to take effect
    // when set to true, the help output will be improved.
    // you can also sort / disable sections
    useImprovedHelp: true,

    // default values, lower values are shown first. Set value to false to omit from help
    outputOrder: {
        'Usage'             : 10,
        'CommandDescription': 20,
        'CommandsList'      : 30,
        'ArgumentsList'     : 40,
        'OptionsList'       : 50,
        'GlobalOptionsList' : 60,
    },

    // when using a lot of options, it can be helpful to seperate them by newlines.
    // This is disabled by default
    seperateGlobalOptionsByNewLine: true,
    seperateOptionsByNewLine      : true,
});

The improved help looks like this (plus some coloring):

-h, --help               display help for command       [default: false]
--log-level <level>      set log level                  [allowed: 'trace'|'debug'|'info'|'warn'|'error'|'fatal'] [default: 'warn']
-v, --verbose            enables verbose output         [default: false]
--debug                  enable debugging output        [default: false] [env: DEBUG]
--no-interaction         no interaction
--silent                 disable output                 [default: false]
--no-color               disable color output           [env: NO_COLOR]
--json                   show json output               [default: true]

Input/Output

• The Command package provides a number of helper functions for reading and printing to the console. These helpers are designed to be used in conjunction with the Command class to provide a consistent and easy-to-use interface for interacting with the terminal.
• They also adhere to the silent, no-interaction, and no-color flags to provide a consistent user experience across different environments.
• They are accessible through the in and out property on the Command instance and the Application object
• The in and out properties are instances of the Input and Output classes, respectively, which provide a number of methods for interacting with the terminal.
• The Input and Output class are macroable, meaning you can add your own methods to them to extend their functionality.

The input questions are powered by the inquirer library.

Input Definitions:

command.action(async function () {
    await this.in.checkbox({ message: '' /* ...options */ });
    await this.in.confirm({ message: '' /* ...options */ });
    await this.in.number({ message: '' /* ...options */ });
    await this.in.input({ message: '' /* ...options */ });
    await this.in.editor({ message: '' /* ...options */ });
    await this.in.search({ message: '' /* ...options */ });
    await this.in.password({ message: '' /* ...options */ });
    await this.in.expand({ message: '' /* ...options */ });
    await this.in.select({ message: '' /* ...options */ });
    await this.in.rawlist({ message: '' /* ...options */ });
});

Macroable: Both the Input and Output classes are macroable, meaning you can add your own methods to them to extend their functionality.

this.in.macro('myMethod', function (arg1, arg2) {
    // your custom method here
});

this.in.myMethod('arg1', 'arg2');

Augmenting: You can also augment the Input and Output classes with additional methods.

import { Input } from '@radicjs/command';

declare module '@radicjs/command' {
    interface Input {
        myMethod(arg1: string, arg2: string): Promise<string>;
    }
}

Tab completion

@todo write docs

Examples

Can be found in the example directory for more examples.

Contributing

Contributions are welcome! Please read the contributing guidelines for more information.

License

This project is licensed under the MIT License. See the LICENSE file for details.