1 files changed, 131 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/analysis/actions/SymlinkTreeAction.java b/src/main/java/com/google/devtools/build/lib/analysis/actions/SymlinkTreeAction.java
new file mode 100644
index 0000000000..c37690105f
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/analysis/actions/SymlinkTreeAction.java
@@ -0,0 +1,131 @@
+// Copyright 2014 The Bazel Authors. 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.actions;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+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.concurrent.ThreadSafety.Immutable;
+import com.google.devtools.build.lib.util.Fingerprint;
+import com.google.devtools.build.lib.util.Preconditions;
+import javax.annotation.Nullable;
+
+/**
+ * Action responsible for the symlink tree creation.
+ * Used to generate runfiles and fileset symlink farms.
+ */
+@Immutable
+public final 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;
+  private final ImmutableMap<String, String> shellEnviroment;
+  private final boolean enableRunfiles;
+
+  /**
+   * Creates SymlinkTreeAction instance.
+   *  @param owner action owner
+   * @param inputManifest the input runfiles manifest
+   * @param artifactMiddleman the middleman artifact representing all the files the symlinks
+   *                          point to (on Windows we need to know if the target of a "symlink" is
+   *                          a directory or a file so we need to build it before)
+   * @param outputManifest 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,
+   * @param enableRunfiles true is the actual symlink tree needs to be created.
+   */
+  public SymlinkTreeAction(
+      ActionOwner owner,
+      Artifact inputManifest,
+      @Nullable Artifact artifactMiddleman,
+      Artifact outputManifest,
+      boolean filesetTree,
+      ImmutableMap<String, String> shellEnvironment,
+      boolean enableRunfiles) {
+    super(owner, computeInputs(inputManifest, artifactMiddleman), ImmutableList.of(outputManifest));
+    Preconditions.checkArgument(outputManifest.getPath().getBaseName().equals("MANIFEST"));
+    this.inputManifest = inputManifest;
+    this.outputManifest = outputManifest;
+    this.filesetTree = filesetTree;
+    this.shellEnviroment = shellEnvironment;
+    this.enableRunfiles = enableRunfiles;
+  }
+
+  private static ImmutableList<Artifact> computeInputs(
+      Artifact inputManifest, Artifact artifactMiddleman) {
+    ImmutableList.Builder<Artifact> result = ImmutableList.<Artifact>builder()
+        .add(inputManifest);
+    if (artifactMiddleman != null
+        && !artifactMiddleman.getPath().getFileSystem().supportsSymbolicLinksNatively()) {
+      result.add(artifactMiddleman);
+    }
+    return result.build();
+  }
+
+  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 ResourceSet.ZERO;
+  }
+
+  @Override
+  public void execute(
+      ActionExecutionContext actionExecutionContext)
+          throws ActionExecutionException, InterruptedException {
+    actionExecutionContext
+        .getExecutor()
+        .getContext(SymlinkTreeActionContext.class)
+        .createSymlinks(this, actionExecutionContext, shellEnviroment, enableRunfiles);
+  }
+}