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CppLibraryPlugin.java
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CppLibraryPlugin.java
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/*
* Copyright 2017 the original author or authors.
*
* 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 org.gradle.language.cpp.plugins;
import org.gradle.api.Plugin;
import org.gradle.api.Project;
import org.gradle.api.artifacts.Configuration;
import org.gradle.api.internal.artifacts.dsl.LazyPublishArtifact;
import org.gradle.api.internal.attributes.ImmutableAttributesFactory;
import org.gradle.api.internal.project.ProjectInternal;
import org.gradle.api.model.ObjectFactory;
import org.gradle.api.provider.Provider;
import org.gradle.api.provider.ProviderFactory;
import org.gradle.api.tasks.TaskContainer;
import org.gradle.api.tasks.TaskProvider;
import org.gradle.api.tasks.bundling.Zip;
import org.gradle.language.cpp.CppBinary;
import org.gradle.language.cpp.CppLibrary;
import org.gradle.language.cpp.CppPlatform;
import org.gradle.language.cpp.CppSharedLibrary;
import org.gradle.language.cpp.CppStaticLibrary;
import org.gradle.language.cpp.internal.DefaultCppLibrary;
import org.gradle.language.cpp.internal.DefaultCppPlatform;
import org.gradle.language.internal.NativeComponentFactory;
import org.gradle.language.nativeplatform.internal.Dimensions;
import org.gradle.language.nativeplatform.internal.toolchains.ToolChainSelector;
import org.gradle.nativeplatform.Linkage;
import org.gradle.nativeplatform.TargetMachineFactory;
import org.gradle.nativeplatform.platform.internal.Architectures;
import org.gradle.nativeplatform.platform.internal.DefaultNativePlatform;
import javax.inject.Inject;
import java.io.File;
import java.util.Set;
import java.util.concurrent.Callable;
import java.util.stream.Stream;
import static org.gradle.language.nativeplatform.internal.Dimensions.tryToBuildOnHost;
import static org.gradle.language.nativeplatform.internal.Dimensions.useHostAsDefaultTargetMachine;
/**
* <p>A plugin that produces a native library from C++ source.</p>
*
* <p>Assumes the source files are located in `src/main/cpp`, public headers are located in `src/main/public` and implementation header files are located in `src/main/headers`.</p>
*
* <p>Adds a {@link CppLibrary} extension to the project to allow configuration of the library.</p>
*
* @since 4.1
*/
public abstract class CppLibraryPlugin implements Plugin<Project> {
private final NativeComponentFactory componentFactory;
private final ToolChainSelector toolChainSelector;
private final ImmutableAttributesFactory attributesFactory;
private final TargetMachineFactory targetMachineFactory;
/**
* CppLibraryPlugin.
*
* @since 4.2
*/
@Inject
public CppLibraryPlugin(NativeComponentFactory componentFactory, ToolChainSelector toolChainSelector, ImmutableAttributesFactory attributesFactory, TargetMachineFactory targetMachineFactory) {
this.componentFactory = componentFactory;
this.toolChainSelector = toolChainSelector;
this.attributesFactory = attributesFactory;
this.targetMachineFactory = targetMachineFactory;
}
@Override
public void apply(final Project project) {
project.getPluginManager().apply(CppBasePlugin.class);
final TaskContainer tasks = project.getTasks();
final ObjectFactory objectFactory = project.getObjects();
final ProviderFactory providers = project.getProviders();
// Add the library and extension
final DefaultCppLibrary library = componentFactory.newInstance(CppLibrary.class, DefaultCppLibrary.class, "main");
project.getExtensions().add(CppLibrary.class, "library", library);
project.getComponents().add(library);
// Configure the component
library.getBaseName().convention(project.getName());
library.getTargetMachines().convention(useHostAsDefaultTargetMachine(targetMachineFactory));
library.getDevelopmentBinary().convention(project.provider(new Callable<CppBinary>() {
@Override
public CppBinary call() throws Exception {
return getDebugSharedHostStream().findFirst().orElseGet(
() -> getDebugStaticHostStream().findFirst().orElseGet(
() -> getDebugSharedStream().findFirst().orElseGet(
() -> getDebugStaticStream().findFirst().orElse(null))));
}
private Stream<CppBinary> getDebugStream() {
return library.getBinaries().get().stream().filter(binary -> !binary.isOptimized());
}
private Stream<CppBinary> getDebugSharedStream() {
return getDebugStream().filter(CppSharedLibrary.class::isInstance);
}
private Stream<CppBinary> getDebugSharedHostStream() {
return getDebugSharedStream().filter(binary -> Architectures.forInput(binary.getTargetMachine().getArchitecture().getName()).equals(DefaultNativePlatform.host().getArchitecture()));
}
private Stream<CppBinary> getDebugStaticStream() {
return getDebugStream().filter(CppStaticLibrary.class::isInstance);
}
private Stream<CppBinary> getDebugStaticHostStream() {
return getDebugStaticStream().filter(binary -> Architectures.forInput(binary.getTargetMachine().getArchitecture().getName()).equals(DefaultNativePlatform.host().getArchitecture()));
}
}));
library.getBinaries().whenElementKnown(binary -> {
library.getMainPublication().addVariant(binary);
});
project.afterEvaluate(p -> {
// TODO: make build type configurable for components
Dimensions.libraryVariants(library.getBaseName(), library.getLinkage(), library.getTargetMachines(), objectFactory, attributesFactory,
providers.provider(() -> project.getGroup().toString()), providers.provider(() -> project.getVersion().toString()),
variantIdentity -> {
if (tryToBuildOnHost(variantIdentity)) {
ToolChainSelector.Result<CppPlatform> result = toolChainSelector.select(CppPlatform.class, new DefaultCppPlatform(variantIdentity.getTargetMachine()));
if (variantIdentity.getLinkage().equals(Linkage.SHARED)) {
library.addSharedLibrary(variantIdentity, result.getTargetPlatform(), result.getToolChain(), result.getPlatformToolProvider());
} else {
library.addStaticLibrary(variantIdentity, result.getTargetPlatform(), result.getToolChain(), result.getPlatformToolProvider());
}
} else {
// Known, but not buildable
library.getMainPublication().addVariant(variantIdentity);
}
});
// TODO - deal with more than one header dir, e.g. generated public headers
final Configuration apiElements = library.getApiElements();
Provider<File> publicHeaders = providers.provider(() -> {
Set<File> files = library.getPublicHeaderDirs().getFiles();
if (files.size() != 1) {
throw new UnsupportedOperationException(String.format("The C++ library plugin currently requires exactly one public header directory, however there are %d directories configured: %s", files.size(), files));
}
return files.iterator().next();
});
apiElements.getOutgoing().artifact(publicHeaders, it -> it.builtBy(library.getPublicHeaderDirs()));
project.getPluginManager().withPlugin("maven-publish", appliedPlugin -> {
final TaskProvider<Zip> headersZip = tasks.register("cppHeaders", Zip.class, task -> {
task.from(library.getPublicHeaderFiles());
task.getDestinationDirectory().set(project.getLayout().getBuildDirectory().dir("headers"));
task.getArchiveClassifier().set("cpp-api-headers");
task.getArchiveFileName().set("cpp-api-headers.zip");
});
library.getMainPublication().addArtifact(new LazyPublishArtifact(headersZip, ((ProjectInternal) project).getFileResolver(), ((ProjectInternal) project).getTaskDependencyFactory()));
});
library.getBinaries().realizeNow();
});
}
}