/*
 * Copyright 2014-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.rules;

import com.facebook.buck.model.BuildTarget;

/**
 * While building up the target graph, we infer the implicit dependencies of a rule by parsing
 * all parameters with types {@link com.facebook.buck.rules.SourcePath} or
 * {@link com.facebook.buck.rules.BuildRule}. However, in some cases like
 * {@link com.facebook.buck.shell.GenruleDescription}, the
 * {@link com.facebook.buck.shell.GenruleDescription.Arg#cmd} argument contains build targets in a
 * specific format. Any {@link Description} that implements this interface can modify its implicit
 * deps by poking at the raw build rule params.
 */
public interface ImplicitDepsInferringDescription<T> {

  public Iterable<BuildTarget> findDepsForTargetFromConstructorArgs(
      BuildTarget buildTarget,
      T constructorArg);
}