command-line-application

  

A helpful wrapper around command-line-args and command-line-usage.

- Easily define single or multi-command CLI application
- Adds required options
- Suggests possible fixes for typos in flags or sub-commands
- Built in --help flag
- Add documentation footers to commands
- Automatically add color to command types
- Type checked!

Related Libraries

- command-line-docs - Generate documentation for your command-line-application commands

Installation

``sh
yarn add command-line-application


or


npm i --save command-line-application
`

Usage

$3

`ts
import { app, Command } from 'command-line-application';

const echo: Command = {
name: 'echo',
description: 'Print a string to the terminal',
examples: ['echo foo', 'echo "Intense message"'],
require: ['value'],
options: [
{
name: 'value',
type: String,
defaultOption: true,
description: 'The value to print'
}
]
};

const args = app(echo);

// $ echo foo
console.log(args);
// output: { value: "foo" }
`

$3

`ts
import app, { Command } from 'command-line-application';

const echo: Command = {
examples: [{ example: 'echo foo', desc: 'The default use case' }],
...
};
`

$3

You can even nest multi-commands!

`ts
import app, { Command } from 'command-line-application';

const test: Command = { ... };
const lint: Command = { ... };
const scripts: MultiCommand = {
name: 'scripts',
descriptions: 'my tools',
commands: [test, lint]
};

const args = app(scripts);

// $ scripts test --fix
console.log(args);
// output: { _command: 'test', fix: true }
`

$3

Add additional docs to your commands with Footers.

`ts
const echo: Command = {
name: 'echo',
description: 'Print a string to the terminal',
examples: ['echo foo', 'echo "Intense message"'],
options: [
{
name: 'value',
type: String,
defaultOption: true,
description: 'The value to print'
}
],
footer: 'Only run this if you really need to',
// or
footer: {
header: 'Additional Info',
content: 'Only run this if you really need to'
},
// or
footer: [
{
header: 'Additional Info',
content: 'Only run this if you really need to'
}
]
};
`

$3

To display code in a footer set code to true.

`ts
const echo: Command = {
name: 'echo',
description: 'Print a string to the terminal',
examples: ['echo foo', 'echo "Intense message"'],
options: [
{
name: 'value',
type: String,
defaultOption: true,
description: 'The value to print'
}
],
footer: {
header: 'Additional Info',
code: true,
content: 'function foo (){\n return 1;\n}'
}
};
`

$3

To require on of multiple flags simply make on of the items in the required array an array of n options.

`ts
const echo: Command = {
name: 'one-or-another',
description: "Errors if one of the flags isn't provided",
examples: ['one-or-another --a', 'one-or-another --b'],
required: [['a', 'b']],
options: [
{
name: 'a',
type: Boolean,
description: 'One options'
},
{
name: 'b',
type: Boolean,
description: 'another option'
}
]
};
`

Options

$3

Provide argv manually.

`ts
const args = app(echo, { argv: ['--help'] });
`

$3

Whether to show the help dialog. Defaults to true

`ts
const args = app(echo, { showHelp: false });
`

$3

Whether to camelCase the parsed options. Defaults to true

`ts
const args = app(echo, { camelCase: false });
`

$3

Configure how command-line-application reports errors.

- exit - (default) print error message and exit process
- throw - throw error message
- object - return the error message on an object with key error`