1 files changed, 59 insertions, 0 deletions
diff --git a/src/test/java/com/google/devtools/build/lib/testutil/UnknownRuleConfiguredTarget.java b/src/test/java/com/google/devtools/build/lib/testutil/UnknownRuleConfiguredTarget.java
new file mode 100644
index 0000000000..d3e5457a67
--- /dev/null
+++ b/src/test/java/com/google/devtools/build/lib/testutil/UnknownRuleConfiguredTarget.java
@@ -0,0 +1,59 @@
+// 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.testutil;
+
+import com.google.common.collect.ImmutableList;
+import com.google.devtools.build.lib.actions.Artifact;
+import com.google.devtools.build.lib.actions.FailAction;
+import com.google.devtools.build.lib.analysis.ConfiguredTarget;
+import com.google.devtools.build.lib.analysis.RuleConfiguredTargetBuilder;
+import com.google.devtools.build.lib.analysis.RuleContext;
+import com.google.devtools.build.lib.analysis.Runfiles;
+import com.google.devtools.build.lib.analysis.RunfilesProvider;
+import com.google.devtools.build.lib.collect.nestedset.NestedSet;
+import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
+import com.google.devtools.build.lib.collect.nestedset.Order;
+import com.google.devtools.build.lib.packages.Rule;
+import com.google.devtools.build.lib.rules.RuleConfiguredTargetFactory;
+
+/**
+ * A null implementation of ConfiguredTarget for rules we don't know how to build.
+ */
+public class UnknownRuleConfiguredTarget implements RuleConfiguredTargetFactory {
+
+  @Override
+  public ConfiguredTarget create(RuleContext context)  {
+    // TODO(bazel-team): (2009) why isn't this an error?  It would stop the build more promptly...
+    context.ruleWarning("cannot build " + context.getRule().getRuleClass() + " rules");
+
+    ImmutableList<Artifact> outputArtifacts = context.getOutputArtifacts();
+    NestedSet<Artifact> filesToBuild;
+    if (outputArtifacts.isEmpty()) {
+      // Gotta build *something*...
+      filesToBuild = NestedSetBuilder.create(Order.STABLE_ORDER,
+          context.createOutputArtifact());
+    } else {
+      filesToBuild = NestedSetBuilder.wrap(Order.STABLE_ORDER, outputArtifacts);
+    }
+
+    Rule rule = context.getRule();
+    context.registerAction(new FailAction(context.getActionOwner(),
+        filesToBuild, "cannot build " + rule.getRuleClass() + " rules such as " + rule.getLabel()));
+    return new RuleConfiguredTargetBuilder(context)
+        .setFilesToBuild(filesToBuild)
+        .add(RunfilesProvider.class, RunfilesProvider.simple(Runfiles.EMPTY))
+        .build();
+  }
+}