1 files changed, 46 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/analysis/AlwaysBuiltArtifactsProvider.java b/src/main/java/com/google/devtools/build/lib/analysis/AlwaysBuiltArtifactsProvider.java
new file mode 100644
index 0000000000..e4d40fc265
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+++ b/src/main/java/com/google/devtools/build/lib/analysis/AlwaysBuiltArtifactsProvider.java
@@ -0,0 +1,46 @@
+// 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;
+
+import com.google.devtools.build.lib.actions.Artifact;
+import com.google.devtools.build.lib.collect.nestedset.NestedSet;
+import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
+
+/**
+ * Artifacts that should be built when a target is mentioned in the command line, but are neither in
+ * the {@code filesToBuild} nor in the runfiles.
+ *
+ * <p>
+ * Link actions, may not run a link for their transitive dependencies, so it does not force the
+ * source files in the transitive closure to be built by default. However, users expect builds to
+ * fail when there is an error in a dependent library, so we use this mechanism to force their
+ * compilation.
+ */
+@Immutable
+public final class AlwaysBuiltArtifactsProvider implements TransitiveInfoProvider {
+
+  private final NestedSet<Artifact> artifactsToAlwaysBuild;
+
+  public AlwaysBuiltArtifactsProvider(NestedSet<Artifact> artifactsToAlwaysBuild) {
+    this.artifactsToAlwaysBuild = artifactsToAlwaysBuild;
+  }
+
+  /**
+   * Returns the collection of artifacts to be built.
+   */
+  public NestedSet<Artifact> getArtifactsToAlwaysBuild() {
+    return artifactsToAlwaysBuild;
+  }
+}