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[webpack-config-utils]: add proper overrides to resolve if/else type properly

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This commit is contained in:
Martin Hochel
2018-06-22 18:37:11 +02:00
parent 0aacc294d9
commit f29026805f
2 changed files with 42 additions and 62 deletions
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types/webpack-config-utils/index.d.ts
Vendored
+30 -50
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@@ -4,57 +4,37 @@
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
// TypeScript Version: 2.8
declare const api: WebpackConfigUtils.API;
export = api;
export function getIfUtils<E extends EnvVars | string>(
env: { [P in E]: boolean | string } | E,
vars?: Array<EnvVars | string>
): IfUtils;
export function removeEmpty<T>(input: Array<T | undefined>): T[];
export function removeEmpty<T>(input: { [P in keyof T]: T[P] }): NonEmptyObject<T>;
export function propIf<E>(a: Falsy, value: any, alternate: E): E;
export function propIf<I>(a: any, value: I, alternate: any): I;
export function propIfNot<I>(a: Falsy, value: I, alternate: any): I;
export function propIfNot<E>(a: any, value: any, alternate: E): E;
declare namespace WebpackConfigUtils {
type Falsy = false | '' | undefined | null | 0;
type DefinedObjKeys<T> = ({ [P in keyof T]: T[P] extends undefined ? never : P })[keyof T];
type NonEmptyObject<T, P extends DefinedObjKeys<T> = DefinedObjKeys<T>> = { [PP in P]: T[PP] };
export type Falsy = false | '' | 'false' | undefined | null | 0;
export type DefinedObjKeys<T> = ({ [P in keyof T]: T[P] extends undefined ? never : P })[keyof T];
export type NonEmptyObject<T, P extends DefinedObjKeys<T> = DefinedObjKeys<T>> = { [PP in P]: T[PP] };
type EnvVars = 'production' | 'prod' | 'test' | 'development' | 'dev';
interface RemoveEmpty {
<T>(input: Array<T | undefined>): T[];
<T>(input: { [P in keyof T]: T[P] }): NonEmptyObject<T>;
}
type GetIfUtils = <E extends EnvVars | string>(
env: { [P in E]: boolean | string } | E,
vars?: Array<EnvVars | string>
) => IfUtils;
export type EnvVars = 'production' | 'prod' | 'test' | 'development' | 'dev';
// @TODO
// with following defintion, generics will get flattened to base type -> string. Any ideas why or how to fix this?
// $ExpectType "value" | "alternate"
// propIf(true, 'value', 'alternate'); // 'value'
//
// type PropIf = <A, I, E>(add: A, value: I, alternate: E) => A extends Falsy ? E : I;
// type PropIfNot = <A, I, E>(add: A, value: I, alternate: E) => A extends Falsy ? I : E;
type PropIf = <I, E>(add: any, value: I, alternate: E) => I | E;
type PropIfNot = PropIf;
interface IfUtilsFn {
<Y, N>(value: Y, alternate?: N): Y | N;
(): boolean;
}
interface IfUtils {
ifDevelopment: IfUtilsFn;
ifNotDevelopment: IfUtilsFn;
ifDev: IfUtilsFn;
ifNotDev: IfUtilsFn;
ifProduction: IfUtilsFn;
ifNotProduction: IfUtilsFn;
ifProd: IfUtilsFn;
ifNotProd: IfUtilsFn;
ifTest: IfUtilsFn;
ifNotTest: IfUtilsFn;
[key: string]: IfUtilsFn;
}
interface API {
getIfUtils: GetIfUtils;
removeEmpty: RemoveEmpty;
propIf: PropIf;
propIfNot: PropIfNot;
}
export interface IfUtilsFn {
<Y, N>(value: Y, alternate?: N): Y | N;
(): boolean;
}
export interface IfUtils {
ifDevelopment: IfUtilsFn;
ifNotDevelopment: IfUtilsFn;
ifDev: IfUtilsFn;
ifNotDev: IfUtilsFn;
ifProduction: IfUtilsFn;
ifNotProduction: IfUtilsFn;
ifProd: IfUtilsFn;
ifNotProd: IfUtilsFn;
ifTest: IfUtilsFn;
ifNotTest: IfUtilsFn;
[key: string]: IfUtilsFn;
}
types/webpack-config-utils/webpack-config-utils-tests.ts
+12 -12
View File
@@ -4,23 +4,23 @@ import { getIfUtils, removeEmpty, propIf, propIfNot } from 'webpack-config-utils
{
// propIf/propIfNot
// $ExpectType "value" | "alternate"
propIf(true, 'value', 'alternate'); // 'value'
// $ExpectType "value"
propIf(true, 'value', 'alternate');
// $ExpectType "value" | "alternate"
propIf(false, 'value', 'alternate'); // 'alternate'
// $ExpectType "alternate"
propIf(false, 'value', 'alternate');
// $ExpectType "value" | "alternate"
propIf('false', 'value', 'alternate'); // 'alternate'
// $ExpectType "alternate"
propIf('false', 'value', 'alternate');
// $ExpectType "value" | "alternate"
propIfNot(true, 'value', 'alternate'); // 'alternate'
// $ExpectType "alternate"
propIfNot(true, 'value', 'alternate');
// $ExpectType "value" | "alternate"
propIfNot(false, 'value', 'alternate'); // 'value'
// $ExpectType "value"
propIfNot(false, 'value', 'alternate');
// $ExpectType "value" | "alternate"
propIfNot('false', 'value', 'alternate'); // 'value'
// $ExpectType "value"
propIfNot('false', 'value', 'alternate');
}
{
// getIfUtils