TypeScript配置文件模板

Configuration.controllers.ts

import {
  readFileSync,
  existsSync,
  mkdirSync
} from 'fs'
import { join } from 'path'

const CONFIG_FOLDER: string = join(__dirname, '../config')
const CONFIG_FILE: string = join(CONFIG_FOLDER, './basic.json')

export class ConfigurationController {
  public constructor() {}
  public Initialize(): Configuration {
    if (this.readConfigurationFile() === undefined) throw new Error(`Configuration file is not defined! (path: ${CONFIG_FILE})`)
    return this.readConfigurationFile() as Configuration
  }
  private configurationFolderExists(): boolean {
    if (!existsSync(CONFIG_FOLDER)) {
      try {
        mkdirSync(CONFIG_FILE)
      } catch (err) {
        throw new Error(err as string)
      }
    }
    return true
  }
  private configurationFileExists(): boolean {
    if (!this.configurationFolderExists()) throw new Error(`Configuration folder is not exists! (path: ${CONFIG_FOLDER})`)
    if (!existsSync(CONFIG_FILE)) throw new Error(`Configuration file is not exists. (path: ${CONFIG_FILE})`)
    return true
  }
  private readConfigurationFile(): Configuration | undefined {
    return this.configurationFileExists() ? JSON.parse(readFileSync(CONFIG_FILE).toString()) : undefined
  }
}

export default {}

index.d.ts

declare type Configuration = {
  port: number;
  host?: string;
}