1 files changed, 109 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/analysis/SymlinkTreeAction.java b/src/main/java/com/google/devtools/build/lib/analysis/SymlinkTreeAction.java
new file mode 100644
index 0000000000..2dc0d4a3ef
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/analysis/SymlinkTreeAction.java
@@ -0,0 +1,109 @@
+// 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.common.base.Preconditions;
+import com.google.common.collect.ImmutableList;
+import com.google.devtools.build.lib.actions.AbstractAction;
+import com.google.devtools.build.lib.actions.ActionExecutionContext;
+import com.google.devtools.build.lib.actions.ActionExecutionException;
+import com.google.devtools.build.lib.actions.ActionOwner;
+import com.google.devtools.build.lib.actions.Artifact;
+import com.google.devtools.build.lib.actions.Executor;
+import com.google.devtools.build.lib.actions.ResourceSet;
+import com.google.devtools.build.lib.util.Fingerprint;
+
+/**
+ * Action responsible for the symlink tree creation.
+ * Used to generate runfiles and fileset symlink farms.
+ */
+public class SymlinkTreeAction extends AbstractAction {
+
+  private static final String GUID = "63412bda-4026-4c8e-a3ad-7deb397728d4";
+
+  private final Artifact inputManifest;
+  private final Artifact outputManifest;
+  private final boolean filesetTree;
+
+  /**
+   * Creates SymlinkTreeAction instance.
+   *
+   * @param owner action owner
+   * @param inputManifest exec path to the input runfiles manifest
+   * @param outputManifest exec path to the generated symlink tree manifest
+   *                       (must have "MANIFEST" base name). Symlink tree root
+   *                       will be set to the artifact's parent directory.
+   * @param filesetTree true if this is fileset symlink tree,
+   *                    false if this is a runfiles symlink tree.
+   */
+  public SymlinkTreeAction(ActionOwner owner, Artifact inputManifest, Artifact outputManifest,
+      boolean filesetTree) {
+    super(owner, ImmutableList.of(inputManifest), ImmutableList.of(outputManifest));
+    Preconditions.checkArgument(outputManifest.getPath().getBaseName().equals("MANIFEST"));
+    this.inputManifest = inputManifest;
+    this.outputManifest = outputManifest;
+    this.filesetTree = filesetTree;
+  }
+
+  public Artifact getInputManifest() {
+    return inputManifest;
+  }
+
+  public Artifact getOutputManifest() {
+    return outputManifest;
+  }
+
+  public boolean isFilesetTree() {
+    return filesetTree;
+  }
+
+  @Override
+  public String getMnemonic() {
+    return "SymlinkTree";
+  }
+
+  @Override
+  protected String getRawProgressMessage() {
+    return (filesetTree ? "Creating Fileset tree " : "Creating runfiles tree ")
+        + outputManifest.getExecPath().getParentDirectory().getPathString();
+  }
+
+  @Override
+  protected String computeKey() {
+    Fingerprint f = new Fingerprint();
+    f.addString(GUID);
+    f.addInt(filesetTree ? 1 : 0);
+    return f.hexDigestAndReset();
+  }
+
+  @Override
+  public ResourceSet estimateResourceConsumption(Executor executor) {
+    // Return null here to indicate that resources would be managed manually
+    // during action execution.
+    return null;
+  }
+
+  @Override
+  public String describeStrategy(Executor executor) {
+    return "local"; // Symlink tree is always generated locally.
+  }
+
+  @Override
+  public void execute(
+      ActionExecutionContext actionExecutionContext)
+          throws ActionExecutionException, InterruptedException {
+    actionExecutionContext.getExecutor().getContext(SymlinkTreeActionContext.class)
+        .createSymlinks(this, actionExecutionContext);
+  }
+}