text: import Config from '@cli-engine/config'
  import cli from 'cli-ux'
  import * as path from 'path'
  
  import { ICommandInfo } from './command'
  import deps from './deps'
  import { IPluginModule, IPluginPJSON } from './plugins/plugin'
  
  const debug = require('debug')('cli:hooks')
  
  export abstract class Hook<T extends keyof IHooks> {
    constructor(protected config: Config, protected options: IHooks[T] = {}) {}
    public abstract run(): Promise<void>
  }
  
  export interface IHooks {
    init: {}
    update: {}
    'plugins:parse': {
      module: IPluginModule
      pjson: IPluginPJSON
    }
    prerun: {
      Command: ICommandInfo
      argv: string[]
    }
  }
  
  interface IConstructor<T, O> {
    new (config: Config, options: O): T
  }
  type LegacyHook<T extends keyof IHooks> = (config: Config, options: IHooks[T]) => Promise<void>
  type HookConstructor<T extends keyof IHooks> = IConstructor<Hook<T>, IHooks[T]>
  
  export class Hooks {
    constructor(private config: Config) {}
  
    async run<T extends keyof IHooks>(event: T, options: IHooks[T] = {}): Promise<void> {
      let scripts = this.config.hooks[event]
      if (!scripts || !this.config.root) return
      for (let script of scripts) {
        script = path.join(this.config.root, script)
        debug(`%s %s`, event, script)
        let Hook: HookConstructor<T> | LegacyHook<T>
        try {
          Hook = deps.util.undefault(require(script))
        } catch (err) {
          cli.warn(err, { context: `hook:${event} loading ${script}` })
          continue
        }
        if (this.isLegacyHook(Hook)) {
          await Hook(this.config, options)
        } else {
          const hook = new Hook(this.config, options)
          await hook.run()
        }
      }
    }
  
    private isLegacyHook<T extends keyof IHooks>(Hook: HookConstructor<T> | LegacyHook<T>): Hook is LegacyHook<T> {
      return !Hook.prototype
    }
  }
  