text: /*
   * Copyright 2019-present Facebook, Inc.
   *
   * 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.facebook.buck.core.rules.impl;
  
  import com.facebook.buck.core.rulekey.AddToRuleKey;
  import com.facebook.buck.core.rules.BuildRule;
  import com.facebook.buck.core.rules.SourcePathRuleFinder;
  import com.facebook.buck.core.sourcepath.SourcePath;
  import com.facebook.buck.core.sourcepath.resolver.SourcePathResolverAdapter;
  import com.facebook.buck.step.fs.SymlinkDirPaths;
  import com.facebook.buck.step.fs.SymlinkPaths;
  import java.util.function.Consumer;
  
  /** A {@link Symlinks} modeling a directory whose sub-paths should all be symlinked. */
  public class SymlinkDir implements Symlinks {
  
    // TODO(agallagher): When symlinking, we only really care about the directory structure and not
    //  also the contents of all files.  Ideally, we'd support some rule key override to model this.
    @AddToRuleKey private final SourcePath directory;
  
    public SymlinkDir(SourcePath directory) {
      this.directory = directory;
    }
  
    @Override
    public void forEachSymlinkInput(Consumer<SourcePath> consumer) {
      consumer.accept(directory);
    }
  
    @Override
    public SymlinkPaths resolveSymlinkPaths(SourcePathResolverAdapter resolver) {
      return new SymlinkDirPaths(resolver.getAbsolutePath(directory));
    }
  
    @Override
    public void forEachSymlinkBuildDep(SourcePathRuleFinder finder, Consumer<BuildRule> consumer) {
      finder.filterBuildRuleInputs(directory).forEach(consumer);
    }
  }
  