src/bundle.js

   1 'use strict';
   2
   3 const path = require('path');
   4
   5 const Promise = require('bluebird')
   6
   7 const fs = Promise.promisifyAll(require('fs'))
   8
   9 const spawn = require('cross-spawn')
  10
  11 const debug = require('debug')('purs-loader');
  12
  13 const dargs = require('./dargs');
  14
  15 module.exports = function bundle(options, bundleModules) {
  16   const stdout = []
  17
  18   const stderr = []
  19
  20   const bundleCommand = options.pscBundle || 'purs';
  21
  22   const bundleArgs = (options.pscBundle ? [] : [ 'bundle' ]).concat(dargs(Object.assign({
  23     _: [path.join(options.output, '*', '*.js')],
  24     output: options.bundleOutput,
  25     namespace: options.bundleNamespace,
  26   }, options.pscBundleArgs)));
  27
  28   bundleModules.forEach(name => bundleArgs.push('--module', name))
  29
  30   debug('bundle: %s %O', bundleCommand, bundleArgs);
  31
  32   return (new Promise((resolve, reject) => {
  33     debug('bundling PureScript...')
  34
  35     const compilation = spawn(bundleCommand, bundleArgs)
  36
  37     compilation.stdout.on('data', data => stdout.push(data.toString()))
  38
  39     compilation.stderr.on('data', data => stderr.push(data.toString()))
  40
  41     compilation.on('close', code => {
  42       debug('finished bundling PureScript.')
  43
  44       if (code !== 0) {
  45         const errorMessage = stderr.join('');
  46
  47         if (errorMessage.length) {
  48           reject(new Error(`bundling failed: ${errorMessage}`))
  49         }
  50         else {
  51           reject(new Error('bundling failed'))
  52         }
  53       }
  54       else {
  55         resolve(fs.appendFileAsync(options.bundleOutput, `module.exports = ${options.bundleNamespace}`))
  56       }
  57     })
  58   }))
  59 };