1 files changed, 57 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/actions/BuilderUtils.java b/src/main/java/com/google/devtools/build/lib/actions/BuilderUtils.java
new file mode 100644
index 0000000000..72ce13335a
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/actions/BuilderUtils.java
@@ -0,0 +1,57 @@
+// Copyright 2014 Google Inc. 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.lib.actions;
+
+/**
+ * Methods needed by {@code SkyframeBuilder}.
+ */
+public final class BuilderUtils {
+
+  private BuilderUtils() {}
+
+  /**
+   * Figure out why an action's execution failed and rethrow the right kind of exception.
+   */
+  public static void rethrowCause(Exception e) throws BuildFailedException, TestExecException {
+    Throwable cause = e.getCause();
+    Throwable innerCause = cause.getCause();
+    if (innerCause instanceof TestExecException) {
+      throw (TestExecException) innerCause;
+    }
+    if (cause instanceof ActionExecutionException) {
+      ActionExecutionException actionExecutionCause = (ActionExecutionException) cause;
+      // Sometimes ActionExecutionExceptions are caused by Actions with no owner.
+      String message =
+          (actionExecutionCause.getLocation() != null) ?
+          (actionExecutionCause.getLocation().print() + " " + cause.getMessage()) :
+          e.getMessage();
+      throw new BuildFailedException(message, actionExecutionCause.isCatastrophe(),
+          actionExecutionCause.getAction(), actionExecutionCause.getRootCauses(),
+          /*errorAlreadyShown=*/ !actionExecutionCause.showError());
+    } else if (cause instanceof MissingInputFileException) {
+      throw new BuildFailedException(cause.getMessage());
+    } else if (cause instanceof RuntimeException) {
+      throw (RuntimeException) cause;
+    } else if (cause instanceof Error) {
+      throw (Error) cause;
+    } else {
+      /*
+       * This should never happen - we should only get exceptions listed in the exception
+       * specification for ExecuteBuildAction.call().
+       */
+      throw new IllegalArgumentException("action terminated with "
+          + "unexpected exception: " + cause.getMessage(), cause);
+    }
+  }
+}