src/main/java/com/google/devtools/build/lib/actions/ImportantOutputHandler.java

// Copyright 2024 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
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package com.google.devtools.build.lib.actions;

import com.google.common.collect.ImmutableMap;
import java.util.Collection;

/** Context to be informed of top-level outputs and their runfiles. */
public interface ImportantOutputHandler extends ActionContext {

  /**
   * Informs this handler that top-level outputs or their runfiles have been built.
   *
   * <p>The handler may verify that remotely stored outputs are still available. Returns a map from
   * digest to output for any artifacts that need to be regenerated via action rewinding.
   */
  ImmutableMap<String, ActionInput> processAndGetLostArtifacts(
      Collection<? extends ActionInput> outputs, InputMetadataProvider metadataProvider);

  ImportantOutputHandler NO_OP = (outputs, metadataProvider) -> ImmutableMap.of();
}