Add a loader demo

demo.txt

@@ -0,0 +1 @@
+foobar

loaders/demo-loader.js

@@ -0,0 +1,16 @@
+const loaderUtils = require('loader-utils');
+
+module.exports = function(input) {
+  const { text } = loaderUtils.getOptions(this);
+
+  return input + text;
+};
+module.exports.pitch = function(remainingRequest, precedingRequest, input) {
+  console.log(
+    'remaining request', remainingRequest,
+    'preceding request', precedingRequest,
+    'input', input
+  );
+
+  return 'pitched';
+};

package.json

@@ -59,6 +59,8 @@
     "karma-mocha": "^1.3.0",
     "karma-phantomjs-launcher": "^1.0.2",
     "karma-webpack": "^2.0.2",
+    "loader-runner": "^2.3.0",
+    "loader-utils": "^1.0.3",
     "mocha": "^3.2.0",
     "mocha-loader": "^1.1.1",
     "optimize-css-assets-webpack-plugin": "^1.3.0",

run-loader.js

@@ -0,0 +1,23 @@
+const fs = require('fs');
+const path = require('path');
+const { runLoaders } = require('loader-runner');
+
+runLoaders({
+  resource: './demo.txt',
+  loaders: [
+    {
+      loader: path.resolve(__dirname, './loaders/demo-loader'),
+      options: {
+        text: 'demo',
+      },
+    },
+  ],
+  readResource: fs.readFile.bind(fs),
+},
+function(err, result) {
+  if(err) {
+    return console.error(err);
+  }
+
+  console.log(result);
+});