// Copyright 2016 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.actions;

import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.ImmutableMap;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import java.util.List;

/**
 * An action that exposes command line arguments and environment variables for the process in which
 * that command line is executed.
 */
public interface CommandAction extends Action {

  /**
   * Returns a list of command line arguments that implements this action.
   *
   * <p>In most cases, this expands any params files. One notable exception is C/C++ compilation
   * with the "compiler_param_file" feature.
   */
  List<String> getArguments() throws CommandLineExpansionException;

  /**
   * Returns a map of command line variables to their values that constitute the environment in
   * which this action should be run. This excludes any inherited environment variables, as this
   * method does not provide access to the client environment.
   */
  @VisibleForTesting
  ImmutableMap<String, String> getIncompleteEnvironmentForTesting() throws ActionExecutionException;

  /** Returns inputs to this action, including inputs that may be pruned. */
  @VisibleForTesting // productionVisibility = Visibility.PRIVATE
  NestedSet<Artifact> getPossibleInputsForTesting();
}