src/main/java/com/google/devtools/build/lib/skyframe/MapAsPackageRoots.java


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56

// Copyright 2017 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.skyframe;

import com.google.common.collect.ImmutableMap;
import com.google.devtools.build.lib.actions.PackageRoots;
import com.google.devtools.build.lib.actions.Root;
import com.google.devtools.build.lib.cmdline.PackageIdentifier;
import com.google.devtools.build.lib.vfs.Path;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;

/**
 * A {@link PackageRoots} backed by a map of package identifiers to paths. A symlink forest must be
 * planted for execution.
 */
public class MapAsPackageRoots implements PackageRoots {
  private final ImmutableMap<PackageIdentifier, Path> packageRootsMap;

  MapAsPackageRoots(ImmutableMap<PackageIdentifier, Path> packageRootsMap) {
    this.packageRootsMap = packageRootsMap;
  }

  @Override
  public Optional<ImmutableMap<PackageIdentifier, Path>> getPackageRootsMap() {
    return Optional.of(packageRootsMap);
  }

  @Override
  public PackageRootLookup getPackageRootLookup() {
    Map<Path, Root> rootMap = new HashMap<>();
    Map<PackageIdentifier, Root> realPackageRoots = new HashMap<>();
    for (Map.Entry<PackageIdentifier, Path> entry : packageRootsMap.entrySet()) {
      Root root = rootMap.get(entry.getValue());
      if (root == null) {
        root = Root.asSourceRoot(entry.getValue(), entry.getKey().getRepository().isMain());
        rootMap.put(entry.getValue(), root);
      }
      realPackageRoots.put(entry.getKey(), root);
    }
    return realPackageRoots::get;
  }
}