1 files changed, 77 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/ActionArtifactCycleReporter.java b/src/main/java/com/google/devtools/build/lib/skyframe/ActionArtifactCycleReporter.java
new file mode 100644
index 0000000000..3105539e2f
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/ActionArtifactCycleReporter.java
@@ -0,0 +1,77 @@
+// 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.skyframe;
+
+import com.google.common.base.Predicate;
+import com.google.common.base.Predicates;
+import com.google.common.collect.Iterables;
+import com.google.devtools.build.lib.actions.Action;
+import com.google.devtools.build.lib.analysis.LabelAndConfiguration;
+import com.google.devtools.build.lib.pkgcache.LoadedPackageProvider;
+import com.google.devtools.build.lib.skyframe.ArtifactValue.OwnedArtifact;
+import com.google.devtools.build.lib.syntax.Label;
+import com.google.devtools.build.skyframe.CycleInfo;
+import com.google.devtools.build.skyframe.SkyFunctionName;
+import com.google.devtools.build.skyframe.SkyKey;
+
+/**
+ * Reports cycles between Actions and Artifacts. These indicates cycles within a rule.
+ */
+public class ActionArtifactCycleReporter extends AbstractLabelCycleReporter {
+
+  private static final Predicate<SkyKey> IS_ARTIFACT_OR_ACTION_SKY_KEY = Predicates.or(
+      SkyFunctions.isSkyFunction(SkyFunctions.ARTIFACT),
+      SkyFunctions.isSkyFunction(SkyFunctions.ACTION_EXECUTION),
+      SkyFunctions.isSkyFunction(SkyFunctions.TARGET_COMPLETION));
+
+  ActionArtifactCycleReporter(LoadedPackageProvider loadedPackageProvider) {
+    super(loadedPackageProvider);
+  }
+
+  @Override
+  protected String prettyPrint(SkyKey key) {
+    return prettyPrint(key.functionName(), key.argument());
+  }
+
+  private String prettyPrint(SkyFunctionName skyFunctionName, Object arg) {
+    if (arg instanceof OwnedArtifact) {
+      return "file: " + ((OwnedArtifact) arg).getArtifact().getRootRelativePathString();
+    } else if (arg instanceof Action) {
+      return "action: " + ((Action) arg).getMnemonic();
+    } else if (arg instanceof LabelAndConfiguration
+        && skyFunctionName == SkyFunctions.TARGET_COMPLETION) {
+      return "configured target: " + ((LabelAndConfiguration) arg).getLabel().toString();
+    }
+    throw new IllegalStateException(
+        "Argument is not Action, TargetCompletion,  or OwnedArtifact: " + arg);
+  }
+
+  @Override
+  protected Label getLabel(SkyKey key) {
+    Object arg = key.argument(); 
+    if (arg instanceof OwnedArtifact) {
+      return ((OwnedArtifact) arg).getArtifact().getOwner();
+    } else if (arg instanceof Action) {
+      return ((Action) arg).getOwner().getLabel();
+    }
+    throw new IllegalStateException("Argument is not Action or OwnedArtifact: " + arg);
+  }
+
+  @Override
+  protected boolean canReportCycle(SkyKey topLevelKey, CycleInfo cycleInfo) {
+    return IS_ARTIFACT_OR_ACTION_SKY_KEY.apply(topLevelKey)
+        && Iterables.all(cycleInfo.getCycle(), IS_ARTIFACT_OR_ACTION_SKY_KEY);
+  }
+}