index.coffee

'use strict'

path = require 'path'
pp = require 'preprocess'
loaderUtils = require 'loader-utils'

# Object.assign polyfill
# https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign#Polyfill
if typeof Object.assign != 'function'
  # Must be writable: true, enumerable: false, configurable: true
  Object.defineProperty Object, 'assign',
    value: (target, varArgs) ->
      # .length of function is 2
      'use strict'
      if target == null
        # TypeError if undefined or null
        throw new TypeError('Cannot convert undefined or null to object')
      to = Object(target)
      index = 1
      while index < arguments.length
        nextSource = arguments[index]
        if nextSource != null
          # Skip over if undefined or null
          for nextKey of nextSource
            # Avoid bugs when hasOwnProperty is shadowed
            if Object::hasOwnProperty.call(nextSource, nextKey)
              to[nextKey] = nextSource[nextKey]
        index++
      to
    writable: true
    configurable: true
# ---
# generated by js2coffee 2.2.0

module.exports = (source) ->
    @cacheable?()
    # parse file extension
    [..., extension] = path.extname(@resourcePath or '').split('.')

    # prepare preprocess options
    options =
        #fileNotFoundSilentFail: false
        #srcEol: os.EOL
        srcDir: @context
        type: extension

    # parse and init context from query
    query = loaderUtils.getOptions(this) || {}

    # get possible user-specific preprocess options from query
    if typeof query.ppOptions is 'object'
        options = Object.assign options, query.ppOptions
        delete query.ppOptions

    # add .cjsx alias
    options.type = 'coffee' if /cjsx/i.test options.type

    # prepare context variables
    context = Object.assign {}, process.env, query
    context.NODE_ENV = context.NODE_ENV or 'development'

    # pp
    processed = pp.preprocess source, context, options
    @callback null, processed