1 files changed, 50 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/skydoc/SystemOutEventHandler.java b/src/main/java/com/google/devtools/build/skydoc/SystemOutEventHandler.java
new file mode 100644
index 0000000000..8d45627276
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/skydoc/SystemOutEventHandler.java
@@ -0,0 +1,50 @@
+// Copyright 2018 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.devtools.build.skydoc;
+
+import com.google.devtools.build.lib.events.Event;
+import com.google.devtools.build.lib.events.EventHandler;
+
+/**
+ * A simple {@link EventHandler} which outputs log information to system.out and system.err.
+ */
+class SystemOutEventHandler implements EventHandler {
+
+  @Override
+  public void handle(Event event) {
+    switch (event.getKind()) {
+      case ERROR:
+      case WARNING:
+      case STDERR:
+        System.err.println(messageWithLocation(event));
+        break;
+      case DEBUG:
+      case INFO:
+      case PROGRESS:
+      case STDOUT:
+        System.out.println(messageWithLocation(event));
+        break;
+      default:
+        System.err.println("Unknown message type: " + event);
+    }
+  }
+
+  private String messageWithLocation(Event event) {
+    String location = event.getLocation() == null
+        ? "<no location>"
+        : event.getLocation().print();
+    return location + ": " + event.getMessage();
+  }
+}