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// Copyright 2016 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.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.actions.ExecutionRequirements;
import com.google.devtools.build.lib.actions.ParameterFile.ParameterFileType;
import com.google.devtools.build.lib.analysis.RuleConfiguredTarget.Mode;
import com.google.devtools.build.lib.analysis.RuleContext;
import com.google.devtools.build.lib.analysis.actions.CommandLine;
import com.google.devtools.build.lib.analysis.actions.CustomCommandLine;
import com.google.devtools.build.lib.analysis.actions.ParamFileInfo;
import com.google.devtools.build.lib.analysis.actions.SpawnAction;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
import com.google.devtools.build.lib.vfs.PathFragment;
import java.util.Collection;
import java.util.Map;
/**
* Helper class to create singlejar actions - singlejar can merge multiple zip files without
* uncompressing all the entries, making it much faster than uncompressing and then recompressing
* the files.
*/
@Immutable
public final class SingleJarActionBuilder {
private static final ImmutableList<String> SOURCE_JAR_COMMAND_LINE_ARGS = ImmutableList.of(
"--compression",
"--normalize",
"--exclude_build_data",
"--warn_duplicate_resources");
/**
* Creates an Action that packages files into a Jar file.
*
* @param resources the resources to put into the Jar.
* @param resourceJars the resource jars to merge into the jar
* @param outputJar the Jar to create
*/
public static void createSourceJarAction(
RuleContext ruleContext,
Map<PathFragment, Artifact> resources,
Collection<Artifact> resourceJars,
Artifact outputJar) {
Artifact singleJar = getSingleJar(ruleContext);
SpawnAction.Builder builder = new SpawnAction.Builder();
// If singlejar's name ends with .jar, it is Java application, otherwise it is native.
// TODO(asmundak): once https://github.com/bazelbuild/bazel/issues/2241 is fixed (that is,
// the native singlejar is used on windows) remove support for the Java implementation
if (singleJar.getFilename().endsWith(".jar")) {
builder
.addTransitiveInputs(JavaHelper.getHostJavabaseInputs(ruleContext))
.setJarExecutable(
JavaCommon.getHostJavaExecutable(ruleContext),
singleJar,
JavaToolchainProvider.fromRuleContext(ruleContext).getJvmOptions())
.setExecutionInfo(ExecutionRequirements.WORKER_MODE_ENABLED);
} else {
builder.setExecutable(singleJar);
}
builder
.addOutput(outputJar)
.addInputs(resources.values())
.addInputs(resourceJars)
.addCommandLine(
sourceJarCommandLine(outputJar, resources, resourceJars),
ParamFileInfo.builder(ParameterFileType.SHELL_QUOTED).setUseAlways(true).build())
.setProgressMessage("Building source jar %s", outputJar.prettyPrint())
.setMnemonic("JavaSourceJar");
ruleContext.registerAction(builder.build(ruleContext));
}
/** Returns the SingleJar deploy jar Artifact. */
private static Artifact getSingleJar(RuleContext ruleContext) {
Artifact singleJar = JavaToolchainProvider.fromRuleContext(ruleContext).getSingleJar();
if (singleJar != null) {
return singleJar;
}
return ruleContext.getPrerequisiteArtifact("$singlejar", Mode.HOST);
}
private static CommandLine sourceJarCommandLine(Artifact outputJar,
Map<PathFragment, Artifact> resources, Iterable<Artifact> resourceJars) {
CustomCommandLine.Builder args = CustomCommandLine.builder();
args.addExecPath("--output", outputJar);
args.addAll(SOURCE_JAR_COMMAND_LINE_ARGS);
args.addExecPaths("--sources", ImmutableList.copyOf(resourceJars));
if (!resources.isEmpty()) {
args.add("--resources");
for (Map.Entry<PathFragment, Artifact> resource : resources.entrySet()) {
args.addFormatted("%s:%s", resource.getValue().getExecPath(), resource.getKey());
}
}
return args.build();
}
}
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