315 lines
12 KiB
TypeScript
315 lines
12 KiB
TypeScript
/// <reference types="node" />
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export type ConfigType = 'number' | 'string' | 'boolean';
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/**
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* Given a Jack object, get the typeof its ConfigSet
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*/
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export type Unwrap<J> = J extends Jack<infer C> ? C : never;
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import { inspect, InspectOptions } from 'node:util';
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/**
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* Defines the type of value that is valid, given a config definition's
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* {@link ConfigType} and boolean multiple setting
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*/
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export type ValidValue<T extends ConfigType = ConfigType, M extends boolean = boolean> = [
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T,
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M
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] extends ['number', true] ? number[] : [T, M] extends ['string', true] ? string[] : [T, M] extends ['boolean', true] ? boolean[] : [T, M] extends ['number', false] ? number : [T, M] extends ['string', false] ? string : [T, M] extends ['boolean', false] ? boolean : [T, M] extends ['string', boolean] ? string | string[] : [T, M] extends ['boolean', boolean] ? boolean | boolean[] : [T, M] extends ['number', boolean] ? number | number[] : [T, M] extends [ConfigType, false] ? string | number | boolean : [T, M] extends [ConfigType, true] ? string[] | number[] | boolean[] : string | number | boolean | string[] | number[] | boolean[];
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/**
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* The meta information for a config option definition, when the
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* type and multiple values can be inferred by the method being used
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*/
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export type ConfigOptionMeta<T extends ConfigType, M extends boolean = boolean, O extends undefined | (T extends 'boolean' ? never : T extends 'string' ? readonly string[] : T extends 'number' ? readonly number[] : readonly number[] | readonly string[]) = undefined | (T extends 'boolean' ? never : T extends 'string' ? readonly string[] : T extends 'number' ? readonly number[] : readonly number[] | readonly string[])> = {
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default?: undefined | (ValidValue<T, M> & (O extends number[] | string[] ? M extends false ? O[number] : O[number][] : unknown));
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validOptions?: O;
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description?: string;
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validate?: ((v: unknown) => v is ValidValue<T, M>) | ((v: unknown) => boolean);
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short?: string | undefined;
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type?: T;
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hint?: T extends 'boolean' ? never : string;
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delim?: M extends true ? string : never;
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} & (M extends false ? {
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multiple?: false | undefined;
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} : M extends true ? {
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multiple: true;
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} : {
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multiple?: boolean;
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});
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/**
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* A set of {@link ConfigOptionMeta} fields, referenced by their longOption
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* string values.
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*/
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export type ConfigMetaSet<T extends ConfigType, M extends boolean = boolean> = {
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[longOption: string]: ConfigOptionMeta<T, M>;
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};
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/**
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* Infer {@link ConfigSet} fields from a given {@link ConfigMetaSet}
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*/
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export type ConfigSetFromMetaSet<T extends ConfigType, M extends boolean, S extends ConfigMetaSet<T, M>> = {
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[longOption in keyof S]: ConfigOptionBase<T, M>;
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};
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/**
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* Fields that can be set on a {@link ConfigOptionBase} or
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* {@link ConfigOptionMeta} based on whether or not the field is known to be
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* multiple.
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*/
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export type MultiType<M extends boolean> = M extends true ? {
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multiple: true;
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delim?: string | undefined;
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} : M extends false ? {
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multiple?: false | undefined;
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delim?: undefined;
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} : {
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multiple?: boolean | undefined;
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delim?: string | undefined;
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};
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/**
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* A config field definition, in its full representation.
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*/
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export type ConfigOptionBase<T extends ConfigType, M extends boolean = boolean> = {
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type: T;
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short?: string | undefined;
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default?: ValidValue<T, M> | undefined;
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description?: string;
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hint?: T extends 'boolean' ? undefined : string | undefined;
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validate?: (v: unknown) => v is ValidValue<T, M>;
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validOptions?: T extends 'boolean' ? undefined : T extends 'string' ? readonly string[] : T extends 'number' ? readonly number[] : readonly number[] | readonly string[];
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} & MultiType<M>;
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export declare const isConfigType: (t: string) => t is ConfigType;
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export declare const isConfigOption: <T extends ConfigType, M extends boolean>(o: any, type: T, multi: M) => o is ConfigOptionBase<T, M>;
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/**
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* A set of {@link ConfigOptionBase} objects, referenced by their longOption
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* string values.
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*/
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export type ConfigSet = {
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[longOption: string]: ConfigOptionBase<ConfigType>;
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};
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/**
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* The 'values' field returned by {@link Jack#parse}
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*/
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export type OptionsResults<T extends ConfigSet> = {
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[k in keyof T]?: T[k]['validOptions'] extends (readonly string[] | readonly number[]) ? T[k] extends ConfigOptionBase<'string' | 'number', false> ? T[k]['validOptions'][number] : T[k] extends ConfigOptionBase<'string' | 'number', true> ? T[k]['validOptions'][number][] : never : T[k] extends ConfigOptionBase<'string', false> ? string : T[k] extends ConfigOptionBase<'string', true> ? string[] : T[k] extends ConfigOptionBase<'number', false> ? number : T[k] extends ConfigOptionBase<'number', true> ? number[] : T[k] extends ConfigOptionBase<'boolean', false> ? boolean : T[k] extends ConfigOptionBase<'boolean', true> ? boolean[] : never;
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};
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/**
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* The object retured by {@link Jack#parse}
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*/
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export type Parsed<T extends ConfigSet> = {
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values: OptionsResults<T>;
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positionals: string[];
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};
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/**
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* A row used when generating the {@link Jack#usage} string
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*/
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export interface Row {
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left?: string;
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text: string;
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skipLine?: boolean;
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type?: string;
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}
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/**
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* A heading for a section in the usage, created by the jack.heading()
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* method.
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*
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* First heading is always level 1, subsequent headings default to 2.
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*
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* The level of the nearest heading level sets the indentation of the
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* description that follows.
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*/
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export interface Heading extends Row {
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type: 'heading';
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text: string;
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left?: '';
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skipLine?: boolean;
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level: number;
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pre?: boolean;
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}
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/**
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* An arbitrary blob of text describing some stuff, set by the
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* jack.description() method.
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*
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* Indentation determined by level of the nearest header.
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*/
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export interface Description extends Row {
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type: 'description';
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text: string;
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left?: '';
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skipLine?: boolean;
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pre?: boolean;
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}
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/**
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* A heading or description row used when generating the {@link Jack#usage}
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* string
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*/
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export type TextRow = Heading | Description;
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/**
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* Either a {@link TextRow} or a reference to a {@link ConfigOptionBase}
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*/
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export type UsageField = TextRow | {
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type: 'config';
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name: string;
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value: ConfigOptionBase<ConfigType>;
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};
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/**
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* Options provided to the {@link Jack} constructor
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*/
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export interface JackOptions {
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/**
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* Whether to allow positional arguments
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*
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* @default true
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*/
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allowPositionals?: boolean;
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/**
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* Prefix to use when reading/writing the environment variables
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*
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* If not specified, environment behavior will not be available.
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*/
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envPrefix?: string;
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/**
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* Environment object to read/write. Defaults `process.env`.
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* No effect if `envPrefix` is not set.
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*/
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env?: {
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[k: string]: string | undefined;
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};
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/**
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* A short usage string. If not provided, will be generated from the
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* options provided, but that can of course be rather verbose if
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* there are a lot of options.
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*/
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usage?: string;
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/**
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* Stop parsing flags and opts at the first positional argument.
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* This is to support cases like `cmd [flags] <subcmd> [options]`, where
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* each subcommand may have different options. This effectively treats
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* any positional as a `--` argument. Only relevant if `allowPositionals`
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* is true.
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*
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* To do subcommands, set this option, look at the first positional, and
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* parse the remaining positionals as appropriate.
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*
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* @default false
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*/
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stopAtPositional?: boolean;
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/**
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* Conditional `stopAtPositional`. If set to a `(string)=>boolean` function,
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* will be called with each positional argument encountered. If the function
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* returns true, then parsing will stop at that point.
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*/
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stopAtPositionalTest?: (arg: string) => boolean;
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}
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/**
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* Class returned by the {@link jack} function and all configuration
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* definition methods. This is what gets chained together.
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*/
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export declare class Jack<C extends ConfigSet = {}> {
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#private;
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constructor(options?: JackOptions);
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/**
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* Set the default value (which will still be overridden by env or cli)
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* as if from a parsed config file. The optional `source` param, if
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* provided, will be included in error messages if a value is invalid or
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* unknown.
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*/
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setConfigValues(values: OptionsResults<C>, source?: string): this;
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/**
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* Parse a string of arguments, and return the resulting
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* `{ values, positionals }` object.
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*
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* If an {@link JackOptions#envPrefix} is set, then it will read default
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* values from the environment, and write the resulting values back
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* to the environment as well.
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*
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* Environment values always take precedence over any other value, except
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* an explicit CLI setting.
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*/
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parse(args?: string[]): Parsed<C>;
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loadEnvDefaults(): void;
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applyDefaults(p: Parsed<C>): void;
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/**
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* Only parse the command line arguments passed in.
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* Does not strip off the `node script.js` bits, so it must be just the
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* arguments you wish to have parsed.
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* Does not read from or write to the environment, or set defaults.
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*/
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parseRaw(args: string[]): Parsed<C>;
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/**
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* Validate that any arbitrary object is a valid configuration `values`
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* object. Useful when loading config files or other sources.
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*/
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validate(o: unknown): asserts o is Parsed<C>['values'];
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writeEnv(p: Parsed<C>): void;
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/**
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* Add a heading to the usage output banner
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*/
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heading(text: string, level?: 1 | 2 | 3 | 4 | 5 | 6, { pre }?: {
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pre?: boolean;
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}): Jack<C>;
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/**
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* Add a long-form description to the usage output at this position.
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*/
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description(text: string, { pre }?: {
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pre?: boolean;
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}): Jack<C>;
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/**
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* Add one or more number fields.
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*/
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num<F extends ConfigMetaSet<'number', false>>(fields: F): Jack<C & ConfigSetFromMetaSet<'number', false, F>>;
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/**
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* Add one or more multiple number fields.
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*/
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numList<F extends ConfigMetaSet<'number'>>(fields: F): Jack<C & ConfigSetFromMetaSet<'number', true, F>>;
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/**
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* Add one or more string option fields.
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*/
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opt<F extends ConfigMetaSet<'string', false>>(fields: F): Jack<C & ConfigSetFromMetaSet<'string', false, F>>;
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/**
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* Add one or more multiple string option fields.
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*/
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optList<F extends ConfigMetaSet<'string'>>(fields: F): Jack<C & ConfigSetFromMetaSet<'string', true, F>>;
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/**
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* Add one or more flag fields.
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*/
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flag<F extends ConfigMetaSet<'boolean', false>>(fields: F): Jack<C & ConfigSetFromMetaSet<'boolean', false, F>>;
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/**
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* Add one or more multiple flag fields.
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*/
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flagList<F extends ConfigMetaSet<'boolean'>>(fields: F): Jack<C & ConfigSetFromMetaSet<'boolean', true, F>>;
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/**
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* Generic field definition method. Similar to flag/flagList/number/etc,
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* but you must specify the `type` (and optionally `multiple` and `delim`)
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* fields on each one, or Jack won't know how to define them.
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*/
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addFields<F extends ConfigSet>(fields: F): Jack<C & F>;
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/**
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* Return the usage banner for the given configuration
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*/
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usage(): string;
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/**
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* Return the usage banner markdown for the given configuration
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*/
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usageMarkdown(): string;
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/**
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* Return the configuration options as a plain object
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*/
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toJSON(): {
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[k: string]: {
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hint?: string | undefined;
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default?: string | number | boolean | string[] | number[] | boolean[] | undefined;
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validOptions?: readonly number[] | readonly string[] | undefined;
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validate?: ((v: unknown) => v is string | number | boolean | string[] | number[] | boolean[]) | undefined;
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description?: string | undefined;
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short?: string | undefined;
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delim?: string | undefined;
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multiple?: boolean | undefined;
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type: ConfigType;
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};
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};
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/**
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* Custom printer for `util.inspect`
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*/
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[inspect.custom](_: number, options: InspectOptions): string;
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}
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/**
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* Main entry point. Create and return a {@link Jack} object.
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*/
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export declare const jack: (options?: JackOptions) => Jack<{}>;
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//# sourceMappingURL=index.d.ts.map
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