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// Copyright 2020 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.java;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.analysis.RuleContext;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.collect.nestedset.Depset;
import com.google.devtools.build.lib.collect.nestedset.NestedSet;
import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
import com.google.devtools.build.lib.collect.nestedset.Order;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
import com.google.devtools.build.lib.packages.Info;
import com.google.devtools.build.lib.packages.RuleClass.ConfiguredTargetFactory.RuleErrorException;
import com.google.devtools.build.lib.packages.StarlarkInfo;
import com.google.devtools.build.lib.packages.StarlarkInfoWithSchema;
import com.google.devtools.build.lib.packages.StarlarkProvider;
import com.google.devtools.build.lib.packages.StarlarkProviderWrapper;
import com.google.devtools.build.lib.packages.StructImpl;
import com.google.devtools.build.lib.vfs.PathFragment;
import java.util.Optional;
import net.starlark.java.eval.EvalException;
import net.starlark.java.eval.Starlark;
/** Information about the system APIs for a Java compilation. */
@Immutable
public class BootClassPathInfo extends StarlarkInfoWrapper {
/** Provider singleton constant. */
public static final StarlarkProviderWrapper<BootClassPathInfo> PROVIDER = new Provider();
private static final BootClassPathInfo EMPTY =
new BootClassPathInfo(null) {
@Override
public NestedSet<Artifact> bootclasspath() {
return NestedSetBuilder.emptySet(Order.STABLE_ORDER);
}
@Override
public NestedSet<Artifact> auxiliary() {
return NestedSetBuilder.emptySet(Order.STABLE_ORDER);
}
@Override
public NestedSet<Artifact> systemInputs() {
return NestedSetBuilder.emptySet(Order.STABLE_ORDER);
}
@Override
public Optional<PathFragment> systemPath() {
return Optional.empty();
}
@Override
public boolean isEmpty() {
return true;
}
};
public static BootClassPathInfo empty() {
return EMPTY;
}
public static BootClassPathInfo create(RuleContext ruleContext, NestedSet<Artifact> bootclasspath)
throws RuleErrorException, InterruptedException {
if (bootclasspath.isEmpty()) {
return empty();
}
ruleContext.initStarlarkRuleContext();
StructImpl javaCommon = (StructImpl) ruleContext.getStarlarkDefinedBuiltin("java_common");
try {
StarlarkProvider starlarkProvider =
javaCommon.getValue("BootClassPathInfo", StarlarkProvider.class);
StarlarkInfo starlarkBootClassPathInfo =
(StarlarkInfo)
Starlark.call(
ruleContext.getStarlarkThread(),
starlarkProvider.createRawConstructor(),
ImmutableList.of(),
ImmutableMap.of("bootclasspath", Depset.of(Artifact.class, bootclasspath)));
return PROVIDER.wrap(starlarkBootClassPathInfo);
} catch (EvalException e) {
throw new RuleErrorException(e);
}
}
private BootClassPathInfo(StructImpl underlying) {
super(underlying);
}
/** The jar files containing classes for system APIs, i.e. a Java <= 8 bootclasspath. */
public NestedSet<Artifact> bootclasspath() throws RuleErrorException {
return getUnderlyingNestedSet("bootclasspath", Artifact.class);
}
/**
* The jar files containing extra classes for system APIs that should not be put in the system
* image to support split-package compilation scenarios.
*/
public NestedSet<Artifact> auxiliary() throws RuleErrorException {
return getUnderlyingNestedSet("_auxiliary", Artifact.class);
}
/** Contents of the directory that is passed to the javac >= 9 {@code --system} flag. */
public NestedSet<Artifact> systemInputs() throws RuleErrorException {
return getUnderlyingNestedSet("_system_inputs", Artifact.class);
}
/** An argument to the javac >= 9 {@code --system} flag. */
public Optional<PathFragment> systemPath() throws RuleErrorException {
return Optional.ofNullable(getUnderlyingValue("_system_path", String.class))
.map(PathFragment::create);
}
public boolean isEmpty() throws RuleErrorException {
return bootclasspath().isEmpty()
&& auxiliary().isEmpty()
&& systemInputs().isEmpty()
&& systemPath().isEmpty();
}
private static class Provider extends StarlarkProviderWrapper<BootClassPathInfo> {
private Provider() {
super(
Label.parseCanonicalUnchecked("@_builtins//:common/java/boot_class_path_info.bzl"),
"BootClassPathInfo");
}
@Override
public BootClassPathInfo wrap(Info value) throws RuleErrorException {
if (value instanceof StarlarkInfoWithSchema
&& value.getProvider().getKey().equals(getKey())) {
return new BootClassPathInfo((StarlarkInfo) value);
} else {
throw new RuleErrorException(
"got value of type '" + Starlark.type(value) + "', want 'BootClassPathInfo'");
}
}
}
}