| // Copyright 2022 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.genquery; |
| |
| import com.google.common.base.Predicate; |
| import com.google.common.base.Predicates; |
| import com.google.common.collect.ImmutableMap; |
| import com.google.devtools.build.lib.cmdline.Label; |
| import com.google.devtools.build.lib.cmdline.PackageIdentifier; |
| import com.google.devtools.build.lib.events.ExtendedEventHandler; |
| import com.google.devtools.build.lib.packages.CachingPackageLocator; |
| import com.google.devtools.build.lib.packages.NoSuchPackageException; |
| import com.google.devtools.build.lib.packages.NoSuchTargetException; |
| import com.google.devtools.build.lib.packages.Package; |
| import com.google.devtools.build.lib.packages.Target; |
| import com.google.devtools.build.lib.pkgcache.PackageProvider; |
| import com.google.devtools.build.lib.vfs.Path; |
| import javax.annotation.Nullable; |
| |
| /** Provide packages and targets to the query operations using precomputed transitive closure. */ |
| final class GenQueryPackageProvider implements PackageProvider, CachingPackageLocator { |
| |
| private final ImmutableMap<PackageIdentifier, Package> pkgMap; |
| private final ImmutableMap<Label, Target> labelToTarget; |
| |
| GenQueryPackageProvider( |
| ImmutableMap<PackageIdentifier, Package> pkgMap, ImmutableMap<Label, Target> labelToTarget) { |
| this.pkgMap = pkgMap; |
| this.labelToTarget = labelToTarget; |
| } |
| |
| Predicate<Label> getValidTargetPredicate() { |
| return Predicates.in(labelToTarget.keySet()); |
| } |
| |
| @Override |
| public Package getPackage(ExtendedEventHandler eventHandler, PackageIdentifier packageId) |
| throws NoSuchPackageException { |
| Package pkg = pkgMap.get(packageId); |
| if (pkg != null) { |
| return pkg; |
| } |
| // Prefer to throw a checked exception on error; malformed genquery should not crash. |
| throw new NoSuchPackageException(packageId, "is not within the scope of the query"); |
| } |
| |
| @Override |
| public Target getTarget(ExtendedEventHandler eventHandler, Label label) |
| throws NoSuchPackageException, NoSuchTargetException { |
| // Try to perform only one map lookup in the common case. |
| Target target = labelToTarget.get(label); |
| if (target != null) { |
| return target; |
| } |
| // Prefer to throw a checked exception on error; malformed genquery should not crash. |
| // Because it'd be more valuable, see if NoSuchPackageException should be thrown: |
| Package unused = getPackage(eventHandler, label.getPackageIdentifier()); |
| throw new NoSuchTargetException(label, "is not within the scope of the query"); |
| } |
| |
| @Override |
| public boolean isPackage(ExtendedEventHandler eventHandler, PackageIdentifier packageName) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Nullable |
| @Override |
| public Path getBuildFileForPackage(PackageIdentifier packageId) { |
| Package pkg = pkgMap.get(packageId); |
| if (pkg == null) { |
| return null; |
| } |
| return pkg.getBuildFile().getPath(); |
| } |
| |
| @Nullable |
| @Override |
| public String getBaseNameForLoadedPackage(PackageIdentifier packageName) { |
| // TODO(b/123795023): we should have the data here but we don't have all packages for Starlark |
| // loads present here. |
| Package pkg = pkgMap.get(packageName); |
| return pkg == null ? null : pkg.getBuildFileLabel().getName(); |
| } |
| } |