From 81fcc70ecab25566148631237d39e60cfb9f6ef8 Mon Sep 17 00:00:00 2001
From: Pooya Parsa <pooya@pi0.ir>
Date: Fri, 18 Aug 2017 21:01:55 +0430
Subject: [PATCH] don't overwrite if 200.html already exists

---
 lib/builder/generator.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/builder/generator.js b/lib/builder/generator.js
index 7b83eac0c7..950ee46b52 100644
--- a/lib/builder/generator.js
+++ b/lib/builder/generator.js
@@ -73,6 +73,13 @@ export default class Generator extends Tapable {
       }))
     }
 
+    // Copy /index.html to /200.html for surge SPA
+    // https://surge.sh/help/adding-a-200-page-for-client-side-routing
+    const _200Path = join(this.distPath, '200.html')
+    if (!existsSync(_200Path)) {
+      await copy(join(this.distPath, 'index.html'), _200Path)
+    }
+
     const duration = Math.round((Date.now() - s) / 100) / 10
     debug(`HTML Files generated in ${duration}s`)