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// Copyright 2014 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 static com.google.common.base.Strings.isNullOrEmpty;
import com.google.common.base.Joiner;
import com.google.common.collect.ImmutableCollection;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableList.Builder;
import com.google.common.collect.ImmutableListMultimap;
import com.google.common.collect.ImmutableMap;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.analysis.AliasProvider;
import com.google.devtools.build.lib.analysis.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.FilesToRunProvider;
import com.google.devtools.build.lib.analysis.PrerequisiteArtifacts;
import com.google.devtools.build.lib.analysis.RuleConfiguredTargetBuilder;
import com.google.devtools.build.lib.analysis.RuleConfiguredTargetFactory;
import com.google.devtools.build.lib.analysis.RuleContext;
import com.google.devtools.build.lib.analysis.Runfiles;
import com.google.devtools.build.lib.analysis.RunfilesProvider;
import com.google.devtools.build.lib.analysis.TransitiveInfoCollection;
import com.google.devtools.build.lib.analysis.configuredtargets.RuleConfiguredTarget.Mode;
import com.google.devtools.build.lib.cmdline.Label;
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.syntax.Type;
import java.util.List;
import java.util.Map;
/**
* Implementation for the {@code java_toolchain} rule.
*/
public class JavaToolchain implements RuleConfiguredTargetFactory {
private final JavaSemantics semantics;
protected JavaToolchain(JavaSemantics semantics) {
this.semantics = semantics;
}
@Override
public ConfiguredTarget create(RuleContext ruleContext) throws RuleErrorException {
ImmutableList<String> javacopts = getJavacOpts(ruleContext);
NestedSet<Artifact> bootclasspath = PrerequisiteArtifacts.nestedSet(
ruleContext, "bootclasspath", Mode.HOST);
NestedSet<Artifact> extclasspath = PrerequisiteArtifacts.nestedSet(
ruleContext, "extclasspath", Mode.HOST);
boolean javacSupportsWorkers =
ruleContext.attributes().get("javac_supports_workers", Type.BOOLEAN);
Artifact javac = ruleContext.getPrerequisiteArtifact("javac", Mode.HOST);
FilesToRunProvider javabuilder =
ruleContext.getExecutablePrerequisite("javabuilder", Mode.HOST);
Artifact headerCompiler = ruleContext.getPrerequisiteArtifact("header_compiler", Mode.HOST);
boolean forciblyDisableHeaderCompilation =
ruleContext.attributes().get("forcibly_disable_header_compilation", Type.BOOLEAN);
Artifact singleJar = ruleContext.getPrerequisiteArtifact("singlejar", Mode.HOST);
Artifact oneVersion = ruleContext.getPrerequisiteArtifact("oneversion", Mode.HOST);
Artifact oneVersionWhitelist = ruleContext
.getPrerequisiteArtifact("oneversion_whitelist", Mode.HOST);
Artifact genClass = ruleContext.getPrerequisiteArtifact("genclass", Mode.HOST);
Artifact resourceJarBuilder = ruleContext.getPrerequisiteArtifact("resourcejar", Mode.HOST);
Artifact timezoneData = ruleContext.getPrerequisiteArtifact("timezone_data", Mode.HOST);
FilesToRunProvider ijar = ruleContext.getExecutablePrerequisite("ijar", Mode.HOST);
ImmutableListMultimap<String, String> compatibleJavacOptions =
getCompatibleJavacOptions(ruleContext);
NestedSet<Artifact> tools = PrerequisiteArtifacts.nestedSet(ruleContext, "tools", Mode.HOST);
TransitiveInfoCollection javacDep = ruleContext.getPrerequisite("javac", Mode.HOST);
ImmutableList<String> jvmOpts =
getJvmOpts(
ruleContext,
ImmutableMap.<Label, ImmutableCollection<Artifact>>of(
AliasProvider.getDependencyLabel(javacDep), ImmutableList.of(javac)));
ImmutableList<JavaPackageConfigurationProvider> packageConfiguration =
ImmutableList.copyOf(
ruleContext.getPrerequisites(
"package_configuration", Mode.HOST, JavaPackageConfigurationProvider.class));
JavaConfiguration configuration = ruleContext.getFragment(JavaConfiguration.class);
JavaToolchainProvider provider =
JavaToolchainProvider.create(
ruleContext.getLabel(),
javacopts,
jvmOpts,
javacSupportsWorkers,
bootclasspath,
extclasspath,
configuration.getDefaultJavacFlags(),
javac,
tools,
javabuilder,
headerCompiler,
forciblyDisableHeaderCompilation,
singleJar,
oneVersion,
oneVersionWhitelist,
genClass,
resourceJarBuilder,
timezoneData,
ijar,
compatibleJavacOptions,
packageConfiguration,
semantics);
RuleConfiguredTargetBuilder builder =
new RuleConfiguredTargetBuilder(ruleContext)
.addSkylarkTransitiveInfo(
JavaToolchainSkylarkApiProvider.NAME, new JavaToolchainSkylarkApiProvider())
.addNativeDeclaredProvider(provider)
.addProvider(RunfilesProvider.class, RunfilesProvider.simple(Runfiles.EMPTY))
.setFilesToBuild(new NestedSetBuilder<Artifact>(Order.STABLE_ORDER).build());
return builder.build();
}
private ImmutableList<String> getJavacOpts(RuleContext ruleContext) {
Builder<String> javacopts = ImmutableList.builder();
String source = ruleContext.attributes().get("source_version", Type.STRING);
if (!isNullOrEmpty(source)) {
javacopts.add("-source").add(source);
}
String target = ruleContext.attributes().get("target_version", Type.STRING);
if (!isNullOrEmpty(target)) {
javacopts.add("-target").add(target);
}
String encoding = ruleContext.attributes().get("encoding", Type.STRING);
if (!isNullOrEmpty(encoding)) {
javacopts.add("-encoding", encoding);
}
List<String> xlint = ruleContext.attributes().get("xlint", Type.STRING_LIST);
if (!xlint.isEmpty()) {
javacopts.add("-Xlint:" + Joiner.on(",").join(xlint));
}
javacopts.addAll(ruleContext.getExpander().withDataLocations().tokenized("misc"));
javacopts.addAll(ruleContext.getExpander().withDataLocations().tokenized("javacopts"));
return javacopts.build();
}
private static ImmutableListMultimap<String, String> getCompatibleJavacOptions(
RuleContext ruleContext) {
ImmutableListMultimap.Builder<String, String> result = ImmutableListMultimap.builder();
for (Map.Entry<String, List<String>> entry :
ruleContext.attributes().get("compatible_javacopts", Type.STRING_LIST_DICT).entrySet()) {
result.putAll(entry.getKey(), JavaHelper.tokenizeJavaOptions(entry.getValue()));
}
return result.build();
}
private static ImmutableList<String> getJvmOpts(
RuleContext ruleContext, ImmutableMap<Label, ImmutableCollection<Artifact>> locations) {
return ruleContext.getExpander().withExecLocations(locations).list("jvm_opts");
}
}
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