1 files changed, 54 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/analysis/config/ConfigMatchingProvider.java b/src/main/java/com/google/devtools/build/lib/analysis/config/ConfigMatchingProvider.java
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index 0000000000..c719191d3b
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+++ b/src/main/java/com/google/devtools/build/lib/analysis/config/ConfigMatchingProvider.java
@@ -0,0 +1,54 @@
+// 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.analysis.config;
+
+import com.google.devtools.build.lib.analysis.TransitiveInfoProvider;
+import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
+import com.google.devtools.build.lib.syntax.Label;
+
+/**
+ * A "configuration target" that asserts whether or not it matches the
+ * configuration it's bound to.
+ *
+ * <p>This can be used, e.g., to declare a BUILD target that defines the
+ * conditions which trigger a configurable attribute branch. In general,
+ * this can be used to trigger for any user-configurable build behavior.
+ */
+@Immutable
+public final class ConfigMatchingProvider implements TransitiveInfoProvider {
+
+  private final Label label;
+  private final boolean matches;
+
+  public ConfigMatchingProvider(Label label, boolean matches) {
+    this.label = label;
+    this.matches = matches;
+  }
+
+  /**
+   * The target's label.
+   */
+  public Label label() {
+    return label;
+  }
+
+  /**
+   * Whether or not the configuration criteria defined by this target match
+   * its actual configuration.
+   */
+  public boolean matches() {
+    return matches;
+  }
+}