hexo/node_modules/meow/index.d.ts

316 lines
8.0 KiB
TypeScript

import {PackageJson} from 'type-fest';
declare namespace meow {
type FlagType = 'string' | 'boolean' | 'number';
/**
Callback function to determine if a flag is required during runtime.
@param flags - Contains the flags converted to camel-case excluding aliases.
@param input - Contains the non-flag arguments.
@returns True if the flag is required, otherwise false.
*/
type IsRequiredPredicate = (flags: Readonly<AnyFlags>, input: readonly string[]) => boolean;
interface Flag<Type extends FlagType, Default> {
readonly type?: Type;
readonly alias?: string;
readonly default?: Default;
readonly isRequired?: boolean | IsRequiredPredicate;
readonly isMultiple?: boolean;
}
type StringFlag = Flag<'string', string>;
type BooleanFlag = Flag<'boolean', boolean>;
type NumberFlag = Flag<'number', number>;
type AnyFlag = StringFlag | BooleanFlag | NumberFlag;
type AnyFlags = Record<string, AnyFlag>;
interface Options<Flags extends AnyFlags> {
/**
Define argument flags.
The key is the flag name in camel-case and the value is an object with any of:
- `type`: Type of value. (Possible values: `string` `boolean` `number`)
- `alias`: Usually used to define a short flag alias.
- `default`: Default value when the flag is not specified.
- `isRequired`: Determine if the flag is required.
If it's only known at runtime whether the flag is required or not you can pass a Function instead of a boolean, which based on the given flags and other non-flag arguments should decide if the flag is required.
- `isMultiple`: Indicates a flag can be set multiple times. Values are turned into an array. (Default: false)
Multiple values are provided by specifying the flag multiple times, for example, `$ foo -u rainbow -u cat`. Space- or comma-separated values are *not* supported.
Note that flags are always defined using a camel-case key (`myKey`), but will match arguments in kebab-case (`--my-key`).
@example
```
flags: {
unicorn: {
type: 'string',
alias: 'u',
default: ['rainbow', 'cat'],
isMultiple: true,
isRequired: (flags, input) => {
if (flags.otherFlag) {
return true;
}
return false;
}
}
}
```
*/
readonly flags?: Flags;
/**
Description to show above the help text. Default: The package.json `"description"` property.
Set it to `false` to disable it altogether.
*/
readonly description?: string | false;
/**
The help text you want shown.
The input is reindented and starting/ending newlines are trimmed which means you can use a [template literal](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/template_strings) without having to care about using the correct amount of indent.
The description will be shown above your help text automatically.
Set it to `false` to disable it altogether.
*/
readonly help?: string | false;
/**
Set a custom version output. Default: The package.json `"version"` property.
Set it to `false` to disable it altogether.
*/
readonly version?: string | false;
/**
Automatically show the help text when the `--help` flag is present. Useful to set this value to `false` when a CLI manages child CLIs with their own help text.
This option is only considered when there is only one argument in `process.argv`.
*/
readonly autoHelp?: boolean;
/**
Automatically show the version text when the `--version` flag is present. Useful to set this value to `false` when a CLI manages child CLIs with their own version text.
This option is only considered when there is only one argument in `process.argv`.
*/
readonly autoVersion?: boolean;
/**
`package.json` as an `Object`. Default: Closest `package.json` upwards.
_You most likely don't need this option._
*/
readonly pkg?: Record<string, unknown>;
/**
Custom arguments object.
@default process.argv.slice(2)
*/
readonly argv?: readonly string[];
/**
Infer the argument type.
By default, the argument `5` in `$ foo 5` becomes a string. Enabling this would infer it as a number.
@default false
*/
readonly inferType?: boolean;
/**
Value of `boolean` flags not defined in `argv`.
If set to `undefined`, the flags not defined in `argv` will be excluded from the result. The `default` value set in `boolean` flags take precedence over `booleanDefault`.
_Note: If used in conjunction with `isMultiple`, the default flag value is set to `[]`._
__Caution: Explicitly specifying `undefined` for `booleanDefault` has different meaning from omitting key itself.__
@example
```
import meow = require('meow');
const cli = meow(`
Usage
$ foo
Options
--rainbow, -r Include a rainbow
--unicorn, -u Include a unicorn
--no-sparkles Exclude sparkles
Examples
$ foo
🌈 unicorns✨🌈
`, {
booleanDefault: undefined,
flags: {
rainbow: {
type: 'boolean',
default: true,
alias: 'r'
},
unicorn: {
type: 'boolean',
default: false,
alias: 'u'
},
cake: {
type: 'boolean',
alias: 'c'
},
sparkles: {
type: 'boolean',
default: true
}
}
});
//{
// flags: {
// rainbow: true,
// unicorn: false,
// sparkles: true
// },
// unnormalizedFlags: {
// rainbow: true,
// r: true,
// unicorn: false,
// u: false,
// sparkles: true
// },
// …
//}
```
*/
readonly booleanDefault?: boolean | null | undefined;
/**
Whether to use [hard-rejection](https://github.com/sindresorhus/hard-rejection) or not. Disabling this can be useful if you need to handle `process.on('unhandledRejection')` yourself.
@default true
*/
readonly hardRejection?: boolean;
/**
Whether to allow unknown flags or not.
@default true
*/
readonly allowUnknownFlags?: boolean;
}
type TypedFlag<Flag extends AnyFlag> =
Flag extends {type: 'number'}
? number
: Flag extends {type: 'string'}
? string
: Flag extends {type: 'boolean'}
? boolean
: unknown;
type PossiblyOptionalFlag<Flag extends AnyFlag, FlagType> =
Flag extends {isRequired: true}
? FlagType
: Flag extends {default: any}
? FlagType
: FlagType | undefined;
type TypedFlags<Flags extends AnyFlags> = {
[F in keyof Flags]: Flags[F] extends {isMultiple: true}
? PossiblyOptionalFlag<Flags[F], Array<TypedFlag<Flags[F]>>>
: PossiblyOptionalFlag<Flags[F], TypedFlag<Flags[F]>>
};
interface Result<Flags extends AnyFlags> {
/**
Non-flag arguments.
*/
input: string[];
/**
Flags converted to camelCase excluding aliases.
*/
flags: TypedFlags<Flags> & Record<string, unknown>;
/**
Flags converted camelCase including aliases.
*/
unnormalizedFlags: TypedFlags<Flags> & Record<string, unknown>;
/**
The `package.json` object.
*/
pkg: PackageJson;
/**
The help text used with `--help`.
*/
help: string;
/**
Show the help text and exit with code.
@param exitCode - The exit code to use. Default: `2`.
*/
showHelp: (exitCode?: number) => void;
/**
Show the version text and exit.
*/
showVersion: () => void;
}
}
/**
@param helpMessage - Shortcut for the `help` option.
@example
```
#!/usr/bin/env node
'use strict';
import meow = require('meow');
import foo = require('.');
const cli = meow(`
Usage
$ foo <input>
Options
--rainbow, -r Include a rainbow
Examples
$ foo unicorns --rainbow
🌈 unicorns 🌈
`, {
flags: {
rainbow: {
type: 'boolean',
alias: 'r'
}
}
});
//{
// input: ['unicorns'],
// flags: {rainbow: true},
// ...
//}
foo(cli.input[0], cli.flags);
```
*/
declare function meow<Flags extends meow.AnyFlags>(helpMessage: string, options?: meow.Options<Flags>): meow.Result<Flags>;
declare function meow<Flags extends meow.AnyFlags>(options?: meow.Options<Flags>): meow.Result<Flags>;
export = meow;