| // Copyright 2019 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.rules.repository; |
| |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.ImmutableSortedMap; |
| import com.google.common.collect.Maps; |
| import com.google.common.collect.Sets; |
| import com.google.devtools.build.lib.cmdline.RepositoryName; |
| import com.google.devtools.build.lib.packages.WorkspaceFileValue; |
| import com.google.devtools.build.lib.skyframe.ManagedDirectoriesKnowledge; |
| import com.google.devtools.build.lib.util.AbruptExitException; |
| import com.google.devtools.build.lib.vfs.PathFragment; |
| import java.util.Comparator; |
| import java.util.Map; |
| import java.util.Objects; |
| import java.util.Set; |
| import javax.annotation.Nullable; |
| |
| /** Managed directories component. {@link ManagedDirectoriesKnowledge} */ |
| public class ManagedDirectoriesKnowledgeImpl implements ManagedDirectoriesKnowledge { |
| private final ManagedDirectoriesListener listener; |
| |
| private ImmutableSortedMap<PathFragment, RepositoryName> dirToRepoMap = ImmutableSortedMap.of(); |
| private ImmutableSortedMap<RepositoryName, ImmutableSet<PathFragment>> repoToDirMap = |
| ImmutableSortedMap.of(); |
| |
| public ManagedDirectoriesKnowledgeImpl(ManagedDirectoriesListener listener) { |
| this.listener = listener; |
| } |
| |
| @Override |
| @Nullable |
| public RepositoryName getOwnerRepository(PathFragment relativePathFragment) { |
| Map.Entry<PathFragment, RepositoryName> entry = dirToRepoMap.floorEntry(relativePathFragment); |
| if (entry != null && relativePathFragment.startsWith(entry.getKey())) { |
| return entry.getValue(); |
| } |
| return null; |
| } |
| |
| @Override |
| public ImmutableSet<PathFragment> getManagedDirectories(RepositoryName repositoryName) { |
| ImmutableSet<PathFragment> pathFragments = repoToDirMap.get(repositoryName); |
| return pathFragments != null ? pathFragments : ImmutableSet.of(); |
| } |
| |
| @Override |
| public boolean workspaceHeaderReloaded( |
| @Nullable WorkspaceFileValue oldValue, @Nullable WorkspaceFileValue newValue) |
| throws AbruptExitException { |
| if (Objects.equals(oldValue, newValue)) { |
| listener.onManagedDirectoriesRefreshed(repoToDirMap.keySet()); |
| return false; |
| } |
| Map<PathFragment, RepositoryName> oldDirToRepoMap = dirToRepoMap; |
| refreshMappings(newValue); |
| if (!Objects.equals(oldDirToRepoMap, dirToRepoMap)) { |
| listener.onManagedDirectoriesRefreshed(repoToDirMap.keySet()); |
| return true; |
| } |
| return false; |
| } |
| |
| private void refreshMappings(@Nullable WorkspaceFileValue newValue) { |
| if (newValue == null) { |
| dirToRepoMap = ImmutableSortedMap.of(); |
| repoToDirMap = ImmutableSortedMap.of(); |
| return; |
| } |
| |
| dirToRepoMap = ImmutableSortedMap.copyOf(newValue.getManagedDirectories()); |
| |
| Map<RepositoryName, Set<PathFragment>> reposMap = Maps.newHashMap(); |
| for (Map.Entry<PathFragment, RepositoryName> entry : dirToRepoMap.entrySet()) { |
| RepositoryName repositoryName = entry.getValue(); |
| reposMap.computeIfAbsent(repositoryName, name -> Sets.newTreeSet()).add(entry.getKey()); |
| } |
| |
| ImmutableSortedMap.Builder<RepositoryName, ImmutableSet<PathFragment>> reposMapBuilder = |
| new ImmutableSortedMap.Builder<>(Comparator.comparing(RepositoryName::getName)); |
| for (Map.Entry<RepositoryName, Set<PathFragment>> entry : reposMap.entrySet()) { |
| reposMapBuilder.put(entry.getKey(), ImmutableSet.copyOf(entry.getValue())); |
| } |
| repoToDirMap = reposMapBuilder.build(); |
| } |
| |
| /** Interface allows {@link BazelRepositoryModule} to react to managed directories refreshes. */ |
| public interface ManagedDirectoriesListener { |
| void onManagedDirectoriesRefreshed(Set<RepositoryName> repositoryNames) |
| throws AbruptExitException; |
| } |
| } |