From 93b36b3ed845cf09b7f5f79acc1e20ebebda2473 Mon Sep 17 00:00:00 2001
From: Paul Gschwendtner <paulgschwendtner@gmail.com>
Date: Thu, 20 Jul 2017 02:37:40 +0200
Subject: [PATCH] build: no longer fallback to index.html file (#5879)

---
 tools/gulp/util/task_helpers.ts | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/tools/gulp/util/task_helpers.ts b/tools/gulp/util/task_helpers.ts
index 10407981de2..b9d6edbc5b7 100644
--- a/tools/gulp/util/task_helpers.ts
+++ b/tools/gulp/util/task_helpers.ts
@@ -148,12 +148,17 @@ export function serverTask(packagePath: string, livereload = true) {
       root: projectDir,
       livereload: livereload,
       port: 4200,
-      fallback: path.join(packagePath, 'index.html'),
       middleware: () => {
         return [httpRewrite.getMiddleware([
+          // Rewrite the node_modules/ and dist/ folder to the real paths. This is a trick to
+          // avoid that those folders will be rewritten to the specified package path.
           { from: '^/node_modules/(.*)$', to: '/node_modules/$1' },
           { from: '^/dist/(.*)$', to: '/dist/$1' },
-          { from: '^(.*)$', to: `/${relativePath}/$1` }
+          // Rewrite every path that doesn't point to a specific file to the index.html file.
+          // This is necessary for Angular's routing using the HTML5 History API.
+          { from: '^/[^.]+$', to: `/${relativePath}/index.html`},
+          // Rewrite any path that didn't match a pattern before to the specified package path.
+          { from: '^(.*)$', to: `/${relativePath}/$1` },
         ])];
       }
     });