Update from Google.

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MOE_MIGRATED_REVID=85702957

1 files changed, 68 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/DirectoryListingStateFunction.java b/src/main/java/com/google/devtools/build/lib/skyframe/DirectoryListingStateFunction.java
new file mode 100644
index 0000000000..6e47a2d54b
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/DirectoryListingStateFunction.java
@@ -0,0 +1,68 @@
+// 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.devtools.build.lib.vfs.RootedPath;
+import com.google.devtools.build.skyframe.SkyFunction;
+import com.google.devtools.build.skyframe.SkyFunctionException;
+import com.google.devtools.build.skyframe.SkyKey;
+import com.google.devtools.build.skyframe.SkyValue;
+
+import java.io.IOException;
+
+/**
+ * A {@link SkyFunction} for {@link DirectoryListingStateValue}s.
+ *
+ * <p>Merely calls DirectoryListingStateValue#create, but also has special handling for
+ * directories outside the package roots (see {@link ExternalFilesHelper}).
+ */
+public class DirectoryListingStateFunction implements SkyFunction {
+
+  private final ExternalFilesHelper externalFilesHelper;
+
+  public DirectoryListingStateFunction(ExternalFilesHelper externalFilesHelper) {
+    this.externalFilesHelper = externalFilesHelper;
+  }
+
+  @Override
+  public SkyValue compute(SkyKey skyKey, Environment env)
+      throws DirectoryListingStateFunctionException {
+    RootedPath dirRootedPath = (RootedPath) skyKey.argument();
+    externalFilesHelper.maybeAddDepOnBuildId(dirRootedPath, env);
+    if (env.valuesMissing()) {
+      return null;
+    }
+    try {
+      return DirectoryListingStateValue.create(dirRootedPath);
+    } catch (IOException e) {
+      throw new DirectoryListingStateFunctionException(e);
+    }
+  }
+
+  @Override
+  public String extractTag(SkyKey skyKey) {
+    return null;
+  }
+
+  /**
+   * Used to declare all the exception types that can be wrapped in the exception thrown by
+   * {@link DirectoryListingStateFunction#compute}.
+   */
+  private static final class DirectoryListingStateFunctionException
+      extends SkyFunctionException {
+    public DirectoryListingStateFunctionException(IOException e) {
+      super(e, Transience.TRANSIENT);
+    }
+  }
+}