Add webpack loader plugin

webpack/loaders/include.js

@@ -0,0 +1,20 @@
+const loaderUtils = require('loader-utils');
+
+module.exports.pitch = function pitch(remainingRequest) {
+  const { globals = undefined, pre = [], post = [] } = loaderUtils.getOptions(this) || {};
+
+  // HACK: NamedModulesPlugin overwrites existing modules when requesting the same module via
+  // different loaders, so we need to circumvent this by appending a suffix to make the name unique
+  // See https://github.com/webpack/webpack/issues/4613#issuecomment-325178346 for details
+  this._module.userRequest = `include-loader!${this._module.userRequest}`;
+
+  return [
+    ...(globals
+      ? Object.keys(globals).map((key) => `self[${JSON.stringify(key)}] = ${globals[key]};`)
+      : []
+    ),
+    ...pre.map((include) => `require(${loaderUtils.stringifyRequest(this, include)});`),
+    `module.exports = require(${loaderUtils.stringifyRequest(this, `!!${remainingRequest}`)});`,
+    ...post.map((include) => `require(${loaderUtils.stringifyRequest(this, include)});`),
+  ].join('\n');
+};