invalidade cache if publicPath changes

src/compiler.js

@@ -9,15 +9,15 @@ const wwp = 'webapp-webpack-plugin';
 module.exports.run = ({prefix, favicons: options, logo, cache}, context, compilation) => {
   // The entry file is just an empty helper
   const filename = '[hash]';
-  const publicPath = compilation.outputOptions.publicPath;
+  const {publicPath = '/'} = compilation.outputOptions;
 
   // Create an additional child compiler which takes the template
   // and turns it into an Node.JS html factory.
   // This allows us to use loaders during the compilation
   const compiler = compilation.createChildCompiler(wwp, {filename, publicPath});
   compiler.context = context;
 
-  const loader = `!${require.resolve('./loader')}?${JSON.stringify({prefix, options})}`;
+  const loader = `!${require.resolve('./loader')}?${JSON.stringify({prefix, options, path: publicPath})}`;
 
   const cacheDirectory = cache && (
       (typeof cache === 'string')

src/loader.js

@@ -5,27 +5,24 @@ const {parseQuery, interpolateName} = require('loader-utils');
 const {getContext} = require('./compat');
 
 const trailingSlash = (path) => (path.substr(-1) !== '/') ? path + '/' : path;
-const getPublicPath = ({outputOptions: {publicPath = '/'}}) => publicPath && trailingSlash(publicPath);
 
 module.exports = function (content) {
   /* istanbul ignore next */
   if (!this.async) throw new Error('async is required');
 
-  const {prefix, options} = parseQuery(this.query);
-
   const callback = this.async();
-  const context = getContext(this);
-  const publicPath = getPublicPath(this._compilation);
-  const path = prefix && trailingSlash(interpolateName(this, prefix, {
-    context,
-    content: msgpack.encode([content, options]), // hash must depend on logo + config
+  const query = parseQuery(this.query);
+  const path = query.path && trailingSlash(query.path);
+  const prefix = query.prefix && trailingSlash(interpolateName(this, query.prefix, {
+    context: getContext(this),
+    content: msgpack.encode([content, query.options]), // hash must depend on logo + config
   }));
 
   // Generate icons
-  return favicons(content, Object.assign(options, {path: url.resolve(publicPath, path)}))
+  return favicons(content, Object.assign(query.options, {path: url.resolve(path, prefix)}))
     .then(result => {
       const html = result.html.join('');
-      const assets = [...result.images, ...result.files].map(({name, contents}) => ({name: path + name, contents}));
+      const assets = [...result.images, ...result.files].map(({name, contents}) => ({name: prefix + name, contents}));
 
       return callback(null, 'module.exports = ' + JSON.stringify(msgpack.encode({html, assets}).toString('base64')));
     })