z1/daemon/operation/start.js

const startWorkers = require('./../module/startWorkers')
const getPack = require('./../module/getPack')

/*
command: start {
  dir // absolute path to dir
  opt: {
    name
    ports
    workers
    output
  },
  args
  env
}
*/

module.exports = function start(config, command) {
  return new Promise((resolve, reject) => {
    if (global.isResurrectable) {
      global.isResurrectable = false
      config.apps = []
    }

    // (re)load package
    const pack = getPack(command.dir, command.opt, command.env)

    // check for duplicate name
    if (config.apps.some(app => app.name === pack.name)) {
      throw new Error(`an app called "${pack.name}" is already running.`)
    }

    config.apps.push({
      dir: command.dir,
      name: pack.name,
      args: command.args,
      opt: command.opt,
      env: command.env
    })

    return startWorkers(config, command.dir, pack, command.args, command.env).then(resolve).catch(err => {
      // remove app from config
      const i = config.apps.findIndex(app => app.name === pack.name)
      if (i !== -1) {
        config.apps.splice(i, 1)
      }

      reject(err)
    })
  })
}