ama-team / voxengine-stubs

var Path = require('path')

var Workspace = require('../Workspace')

var Support = {

  exec: function (args) {

    return new Promise(function (resolve, reject) {

      var options = {printStdout: true, printStderr: true, breakOnError: false}

      var exec = jake.exec(args.join(' '), options, resolve)

      exec.addListener('error', reject)

    })

  },

  supersede: function (args) {

    Support.promise(Support.exec(args))

  },

  chain: function (tasks, suppressErrors, callback) {

    var errors = []

    callback = callback || function (error, value) {

      error ? fail(error) : complete(value)

    }

    tasks = tasks.map(function (task) {

      if (typeof task === 'string' || task instanceof String) {

        return jake.Task[task]

      }

      return task

    })

    var first = tasks.shift()

    var last = tasks.reduce(function (carrier, task) {

      carrier.addListener('complete', task.invoke.bind(task))

      carrier.addListener('fail', function (error) {

        if (!suppressErrors) {

          return fail(error)

        }

        errors.push(error)

        task.invoke()

      })

      return task

    }, first)

    last.addListener('complete', function (value) {

      callback(errors.pop(), value)

    })

    last.addListener('fail', callback)

    first.invoke()

  },

  promise: function (promise) {

    promise.then(complete, setTimeout.bind(global, fail, 0))

  },

  executable: function (name) {

    return Path.join(Workspace.modules, '.bin', name)

  }

}

module.exports = Support