From cf60de0e9526b36feda8ef6a4fe925dcac24d34b Mon Sep 17 00:00:00 2001
From: Devon Carew <devoncarew@gmail.com>
Date: Fri, 23 Oct 2015 13:28:22 -0700
Subject: [PATCH] add check for dartdoc

---
 lib/grinder_sdk.dart | 6 ++++++
 tool/grind.dart      | 8 +++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/lib/grinder_sdk.dart b/lib/grinder_sdk.dart
index 84cc2e4c..7ef67ab1 100644
--- a/lib/grinder_sdk.dart
+++ b/lib/grinder_sdk.dart
@@ -366,6 +366,12 @@ class Dart2js {
 
 /// Utility class for invoking dartdoc.
 class DartDoc {
+  /// Return whether the dartdoc tool exists in this SDK.
+  static bool exists() {
+    File file = new File(sdkBin('dartdoc'));
+    return file.existsSync();
+  }
+
   static void doc() {
     runlib.run(sdkBin('dartdoc'));
   }
diff --git a/tool/grind.dart b/tool/grind.dart
index afbeac44..e55f4486 100644
--- a/tool/grind.dart
+++ b/tool/grind.dart
@@ -73,7 +73,13 @@ void coverage() {
 void buildbot() => null;
 
 @Task()
-doc() => DartDoc.docAsync();
+doc() {
+  if (DartDoc.exists()) {
+    DartDoc.docAsync();
+  } else {
+    log('Dartdoc is not available in this SDK.');
+  }
+}
 
 @Task()
 ddc() {