nemmtor

NestJs has built in ConfigurableModuleBuilder, it is very powerful and satisfies most of cases for dynamic modules:

import { ConfigurableModuleBuilder, Module } from '@nestjs/common';
import { MongoClient } from 'mongodb';

type MongoClientModuleOptions = {
  host: string;
  name: string;
  port: number;
  user: string;

nemmtor

type LastPipeReturn<T extends any[], U = any> = T extends [...infer I, infer L] ? L extends (...args: any) => U ? ReturnType<L> : never : never; 

type PipeArgsRecursive<T extends readonly any[], Result extends any[] = [], HeadArg = undefined> =
    T extends readonly [infer Head, ...infer Tail] ? 
        Head extends (arg: HeadArg) => infer HeadReturn ?
            PipeArgsRecursive<Tail, [...Result, Head], HeadReturn> : never : Result;

const pipe = <Args extends ((arg: any) => any)[], Return extends LastPipeReturn<Args> = LastPipeReturn<Args>>(...pipes: PipeArgsRecursive<Args>): Return => {

nemmtor

  // Available variables:
  // - Machine
  // - interpret
  // - assign
  // - send
  // - sendParent
  // - spawn
  // - raise
  // - actions

nemmtor

{
  "trailingComma": "all",
  "tabWidth": 2,
  "semi": true,
  "singleQuote": true,
  "endOfLine": "auto"
}