config.ts

/**
 * Wechaty - Wechaty for Bot, Connect ChatBots, Chat as a Service
 *
 * https://github.com/wechaty/wechaty/
 */
import { execSync } from 'child_process'
import { accessSync, F_OK } from 'fs'

/* tslint:disable:variable-name */
/* tslint:disable:no-var-requires */
const Config = require('../package.json').wechaty

/**
 * 1. ENVIRONMENT VARIABLES + PACKAGES.JSON (default)
 */
Object.assign(Config, {
  head:       process.env['WECHATY_HEAD']      || Config.DEFAULT_HEAD
  , puppet:   process.env['WECHATY_PUPPET']    || Config.DEFAULT_PUPPET
  , apihost:  process.env['WECHATY_APIHOST']   || Config.DEFAULT_APIHOST
  , validApiHost
})

function validApiHost(apihost) {
  if (/^[a-zA-Z0-9\.\-\_]+:?[0-9]*$/.test(apihost)) {
    return true
  }
  throw new Error('validApiHost() fail for ' + apihost)
}
validApiHost(Config.apihost)

/**
 * 2. ENVIRONMENT VARIABLES (only)
 */
Object.assign(Config, {
  port:       process.env['WECHATY_PORT']      || null // 0 for disable port
  , profile:  process.env['WECHATY_PROFILE']   || null // DO NOT set DEFAULT_PROFILE, because sometimes user do not want to save session
  , token:    process.env['WECHATY_TOKEN']     || null // DO NOT set DEFAULT, because sometimes user do not want to connect to io cloud service
})

/**
 * 3. Service Settings
 */
Object.assign(Config, {
  // get PORT form cloud service env, ie: heroku
  httpPort: process.env['PORT'] || process.env['WECHATY_PORT'] || Config.DEFAULT_PORT
})

/**
 * 4. Envioronment Identify
 */
Object.assign(Config, {
  isDocker:   isWechatyDocker()
})

function isWechatyDocker() {
  const isCi = require('is-ci')
  if (isCi) {
    return false
  }

  const cgroup = '/proc/1/cgroup'
  try { accessSync(cgroup, F_OK) }
  catch (e) { return false }

  const line = execSync(`head -1 ${cgroup}`)
                .toString()
                .replace(/\n$/, '')

  if (/\/$/.test(line)) {
    return false
  }
  // instead of '/', docker will end with container id
  return true
}

/**
 * 5. live setting
 */
Config.puppetInstance = function(instance) {
  if (typeof instance !== 'undefined') {  // null is valid here
    Config._puppetInstance = instance
  }
  return Config._puppetInstance
}

// module.exports = Config.default = Config.Config = Config
export default Config