From a03c8f77adf871cbeac04797a4cc7c9932d66184 Mon Sep 17 00:00:00 2001
From: Seth Ladd <sethladd@gmail.com>
Date: Mon, 16 May 2016 13:05:13 -0700
Subject: [PATCH] gracefully handle generating docs twice (#3939)

* gracefully handle generating docs twice

* silently handle if directory doesn't exist
---
 dev/tools/dartdoc.dart | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/dev/tools/dartdoc.dart b/dev/tools/dartdoc.dart
index 742c6006bc..0557dd4190 100644
--- a/dev/tools/dartdoc.dart
+++ b/dev/tools/dartdoc.dart
@@ -89,6 +89,7 @@ dependencies:
 /// paths. Cleanup unused index.html files no longer needed.
 void createIndexAndCleanup() {
   print('\nCreating a custom index.html in $kDocRoot/index.html');
+  removeOldFlutterDocsDir();
   renameApiDir();
   copyIndexToRootOfDocs();
   addHtmlBaseToIndex();
@@ -96,6 +97,14 @@ void createIndexAndCleanup() {
   print('\nDocs ready to go!');
 }
 
+void removeOldFlutterDocsDir() {
+  try {
+    new Directory('$kDocRoot/flutter').deleteSync(recursive: true);
+  } catch(e) {
+    // If the directory does not exist, that's OK.
+  }
+}
+
 void renameApiDir() {
   new Directory('$kDocRoot/api').renameSync('$kDocRoot/flutter');
 }