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// 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.packages;
import com.google.common.base.Suppliers;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.devtools.build.lib.analysis.ConfiguredRuleClassProvider;
import com.google.devtools.build.lib.bazel.BazelRepositoryModule;
import com.google.devtools.build.lib.bazel.repository.MavenDownloader;
import com.google.devtools.build.lib.bazel.repository.MavenServerFunction;
import com.google.devtools.build.lib.bazel.repository.cache.RepositoryCache;
import com.google.devtools.build.lib.bazel.repository.downloader.HttpDownloader;
import com.google.devtools.build.lib.bazel.repository.skylark.SkylarkRepositoryFunction;
import com.google.devtools.build.lib.bazel.rules.BazelRulesModule;
import com.google.devtools.build.lib.packages.BuildFileName;
import com.google.devtools.build.lib.packages.PackageFactory.EnvironmentExtension;
import com.google.devtools.build.lib.packages.RuleClassProvider;
import com.google.devtools.build.lib.rules.repository.RepositoryDelegatorFunction;
import com.google.devtools.build.lib.rules.repository.RepositoryFunction;
import com.google.devtools.build.lib.rules.repository.RepositoryLoaderFunction;
import com.google.devtools.build.lib.runtime.proto.InvocationPolicyOuterClass.InvocationPolicy;
import com.google.devtools.build.lib.skyframe.ActionEnvironmentFunction;
import com.google.devtools.build.lib.skyframe.BazelSkyframeExecutorConstants;
import com.google.devtools.build.lib.skyframe.ClientEnvironmentFunction;
import com.google.devtools.build.lib.skyframe.DirectoryListingFunction;
import com.google.devtools.build.lib.skyframe.DirectoryListingStateFunction;
import com.google.devtools.build.lib.skyframe.LocalRepositoryLookupFunction;
import com.google.devtools.build.lib.skyframe.PackageFunction.ActionOnIOExceptionReadingBuildFile;
import com.google.devtools.build.lib.skyframe.PackageLookupFunction.CrossRepositoryLabelViolationStrategy;
import com.google.devtools.build.lib.skyframe.PrecomputedValue;
import com.google.devtools.build.lib.skyframe.SkyFunctions;
import com.google.devtools.build.lib.vfs.Path;
import com.google.devtools.build.skyframe.SkyFunction;
import com.google.devtools.build.skyframe.SkyFunctionName;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicReference;
/**
* Concrete implementation of {@link PackageLoader} that uses skyframe under the covers, but with no
* caching or incrementality.
*/
public class BazelPackageLoader extends AbstractPackageLoader {
/**
* Version is the string BazelPackageLoader reports in native.bazel_version to be used by Skylark.
*/
private final String version;
/** Returns a fresh {@link Builder} instance. */
public static Builder builder(Path workspaceDir, Path installBase, Path outputBase) {
// Prevent PackageLoader from fetching any remote repositories; these should only be fetched by
// Bazel before calling PackageLoader.
AtomicBoolean isFetch = new AtomicBoolean(false);
Builder builder = new Builder(workspaceDir, installBase, outputBase, isFetch);
RepositoryCache repositoryCache = new RepositoryCache();
HttpDownloader httpDownloader = new HttpDownloader(repositoryCache);
// Set up SkyFunctions and PrecomputedValues needed to make local repositories work correctly.
ImmutableMap<String, RepositoryFunction> repositoryHandlers =
BazelRepositoryModule.repositoryRules(httpDownloader, new MavenDownloader(repositoryCache));
builder.addExtraSkyFunctions(
ImmutableMap.<SkyFunctionName, SkyFunction>builder()
.put(
SkyFunctions.CLIENT_ENVIRONMENT_VARIABLE,
new ClientEnvironmentFunction(new AtomicReference<>(ImmutableMap.of())))
.put(
SkyFunctions.DIRECTORY_LISTING_STATE,
new DirectoryListingStateFunction(builder.externalFilesHelper))
.put(SkyFunctions.ACTION_ENVIRONMENT_VARIABLE, new ActionEnvironmentFunction())
.put(SkyFunctions.DIRECTORY_LISTING, new DirectoryListingFunction())
.put(SkyFunctions.LOCAL_REPOSITORY_LOOKUP, new LocalRepositoryLookupFunction())
.put(
SkyFunctions.REPOSITORY_DIRECTORY,
new RepositoryDelegatorFunction(
repositoryHandlers,
new SkylarkRepositoryFunction(httpDownloader),
isFetch,
ImmutableMap::of,
builder.directories))
.put(SkyFunctions.REPOSITORY, new RepositoryLoaderFunction())
.put(MavenServerFunction.NAME, new MavenServerFunction(builder.directories))
.build());
// Set extra precomputed values.
builder.addExtraPrecomputedValues(
PrecomputedValue.injected(PrecomputedValue.ACTION_ENV, ImmutableMap.of()),
PrecomputedValue.injected(
RepositoryDelegatorFunction.REPOSITORY_OVERRIDES,
Suppliers.ofInstance(ImmutableMap.of())));
return builder;
}
/** Builder for {@link BazelPackageLoader} instances. */
public static class Builder extends AbstractPackageLoader.Builder {
private static final ConfiguredRuleClassProvider DEFAULT_RULE_CLASS_PROVIDER =
createRuleClassProvider();
private final AtomicBoolean isFetch;
private String version = "";
private static ConfiguredRuleClassProvider createRuleClassProvider() {
ConfiguredRuleClassProvider.Builder classProvider = new ConfiguredRuleClassProvider.Builder();
new BazelRepositoryModule().initializeRuleClasses(classProvider);
new BazelRulesModule().initializeRuleClasses(classProvider);
return classProvider.build();
}
private Builder(Path workspaceDir, Path installBase, Path outputBase, AtomicBoolean isFetch) {
super(workspaceDir, installBase, outputBase);
this.isFetch = isFetch;
}
@Override
public BazelPackageLoader buildImpl() {
return new BazelPackageLoader(this, version);
}
@Override
protected RuleClassProvider getDefaultRuleClassProvider() {
return DEFAULT_RULE_CLASS_PROVIDER;
}
@Override
protected String getDefaultDefaultPackageContents() {
return DEFAULT_RULE_CLASS_PROVIDER.getDefaultsPackageContent(
InvocationPolicy.getDefaultInstance());
}
/**
* Version is the string BazelPackageLoader reports in native.bazel_version to be used by
* Skylark.
*/
public Builder setVersion(String version) {
this.version = version;
return this;
}
Builder setFetchForTesting() {
this.isFetch.set(true);
return this;
}
}
private BazelPackageLoader(Builder builder, String version) {
super(builder);
this.version = version;
}
@Override
protected String getVersion() {
return version;
}
@Override
protected ImmutableList<EnvironmentExtension> getEnvironmentExtensions() {
return ImmutableList.of();
}
@Override
protected CrossRepositoryLabelViolationStrategy getCrossRepositoryLabelViolationStrategy() {
return BazelSkyframeExecutorConstants.CROSS_REPOSITORY_LABEL_VIOLATION_STRATEGY;
}
@Override
protected ImmutableList<BuildFileName> getBuildFilesByPriority() {
return BazelSkyframeExecutorConstants.BUILD_FILES_BY_PRIORITY;
}
@Override
protected ActionOnIOExceptionReadingBuildFile getActionOnIOExceptionReadingBuildFile() {
return BazelSkyframeExecutorConstants.ACTION_ON_IO_EXCEPTION_READING_BUILD_FILE;
}
}
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