fix: listen end events (#42)

In the event that the read stream terminates before all of the data
has been read, the pipe will send an 'end' event. We should listen for
this event and hit the callback with it, instead of hanging forever.

.travis.yml

@@ -19,14 +19,18 @@ jobs:
       env: WEBPACK_VERSION=latest JOB_PART=lint
       script: npm run travis:$JOB_PART
     - <<: *test-latest
-      node_js: 8
+      node_js: 10
       env: WEBPACK_VERSION=latest JOB_PART=coverage
       script: npm run travis:$JOB_PART
       after_success: 'bash <(curl -s https://codecov.io/bash)'
+    - <<: *test-latest
+      node_js: 10
+      env: WEBPACK_VERSION=latest JOB_PART=test
+      script: npm run travis:$JOB_PART
     - stage: Webpack canary
       before_script: npm i --no-save git://github.com/webpack/webpack.git#master
       script: npm run travis:$JOB_PART
-      node_js: 8
+      node_js: 6
       env: WEBPACK_VERSION=canary JOB_PART=test
 before_install:
   - 'if [[ `npm -v` != 5* ]]; then npm i -g npm@^5.0.0; fi'

example/webpack.config.js

@@ -1,6 +1,6 @@
 const path = require('path');
 const MiniCssExtractPlugin = require('mini-css-extract-plugin'); // eslint-disable-line import/no-extraneous-dependencies
-const threadLoader = require('thread-loader'); // eslint-disable-line import/no-extraneous-dependencies
+const threadLoader = require('../src'); // eslint-disable-line import/no-extraneous-dependencies
 
 module.exports = (env) => {
   const workerPool = {
@@ -30,7 +30,7 @@ module.exports = (env) => {
           test: /\.js$/,
           use: [
             env.threads !== 0 && {
-              loader: 'thread-loader',
+              loader: path.resolve(__dirname, '../src/index.js'),
               options: workerPool,
             },
             'babel-loader',
@@ -41,7 +41,7 @@ module.exports = (env) => {
           use: [
             MiniCssExtractPlugin.loader,
             env.threads !== 0 && {
-              loader: 'thread-loader',
+              loader: path.resolve(__dirname, '../src/index.js'),
               options: workerPoolSass,
             },
             'css-loader',