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org.springframework.boot.gradle.tasks.bundling.BootArchiveSupport Maven / Gradle / Ivy
/*
* Copyright 2012-2020 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
*
* https://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.springframework.boot.gradle.tasks.bundling;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.function.Function;
import org.gradle.api.file.CopySpec;
import org.gradle.api.file.FileCopyDetails;
import org.gradle.api.file.FileTreeElement;
import org.gradle.api.file.RelativePath;
import org.gradle.api.internal.file.copy.CopyAction;
import org.gradle.api.internal.file.copy.CopyActionProcessingStream;
import org.gradle.api.internal.file.copy.FileCopyDetailsInternal;
import org.gradle.api.java.archives.Attributes;
import org.gradle.api.java.archives.Manifest;
import org.gradle.api.specs.Spec;
import org.gradle.api.specs.Specs;
import org.gradle.api.tasks.WorkResult;
import org.gradle.api.tasks.bundling.Jar;
import org.gradle.api.tasks.util.PatternSet;
/**
* Support class for implementations of {@link BootArchive}.
*
* @author Andy Wilkinson
* @author Phillip Webb
* @see BootJar
* @see BootWar
*/
class BootArchiveSupport {
private static final byte[] ZIP_FILE_HEADER = new byte[] { 'P', 'K', 3, 4 };
private static final Set DEFAULT_LAUNCHER_CLASSES;
static {
Set defaultLauncherClasses = new HashSet<>();
defaultLauncherClasses.add("org.springframework.boot.loader.JarLauncher");
defaultLauncherClasses.add("org.springframework.boot.loader.PropertiesLauncher");
defaultLauncherClasses.add("org.springframework.boot.loader.WarLauncher");
DEFAULT_LAUNCHER_CLASSES = Collections.unmodifiableSet(defaultLauncherClasses);
}
private final PatternSet requiresUnpack = new PatternSet();
private final PatternSet exclusions = new PatternSet();
private final String loaderMainClass;
private final Spec librarySpec;
private final Function compressionResolver;
private LaunchScriptConfiguration launchScript;
private boolean excludeDevtools = false;
BootArchiveSupport(String loaderMainClass, Spec librarySpec,
Function compressionResolver) {
this.loaderMainClass = loaderMainClass;
this.librarySpec = librarySpec;
this.compressionResolver = compressionResolver;
this.requiresUnpack.include(Specs.satisfyNone());
configureExclusions();
}
void configureManifest(Manifest manifest, String mainClass, String classes, String lib, String classPathIndex,
String layersIndex) {
Attributes attributes = manifest.getAttributes();
attributes.putIfAbsent("Main-Class", this.loaderMainClass);
attributes.putIfAbsent("Start-Class", mainClass);
attributes.computeIfAbsent("Spring-Boot-Version", (name) -> determineSpringBootVersion());
attributes.putIfAbsent("Spring-Boot-Classes", classes);
attributes.putIfAbsent("Spring-Boot-Lib", lib);
if (classPathIndex != null) {
attributes.putIfAbsent("Spring-Boot-Classpath-Index", classPathIndex);
}
if (layersIndex != null) {
attributes.putIfAbsent("Spring-Boot-Layers-Index", layersIndex);
}
}
private String determineSpringBootVersion() {
String version = getClass().getPackage().getImplementationVersion();
return (version != null) ? version : "unknown";
}
CopyAction createCopyAction(Jar jar) {
return createCopyAction(jar, null, null);
}
CopyAction createCopyAction(Jar jar, LayerResolver layerResolver, String layerToolsLocation) {
File output = jar.getArchiveFile().get().getAsFile();
Manifest manifest = jar.getManifest();
boolean preserveFileTimestamps = jar.isPreserveFileTimestamps();
boolean includeDefaultLoader = isUsingDefaultLoader(jar);
Spec requiresUnpack = this.requiresUnpack.getAsSpec();
Spec exclusions = this.exclusions.getAsExcludeSpec();
LaunchScriptConfiguration launchScript = this.launchScript;
Spec librarySpec = this.librarySpec;
Function compressionResolver = this.compressionResolver;
String encoding = jar.getMetadataCharset();
CopyAction action = new BootZipCopyAction(output, manifest, preserveFileTimestamps, includeDefaultLoader,
layerToolsLocation, requiresUnpack, exclusions, launchScript, librarySpec, compressionResolver,
encoding, layerResolver);
return jar.isReproducibleFileOrder() ? new ReproducibleOrderingCopyAction(action) : action;
}
private boolean isUsingDefaultLoader(Jar jar) {
return DEFAULT_LAUNCHER_CLASSES.contains(jar.getManifest().getAttributes().get("Main-Class"));
}
LaunchScriptConfiguration getLaunchScript() {
return this.launchScript;
}
void setLaunchScript(LaunchScriptConfiguration launchScript) {
this.launchScript = launchScript;
}
void requiresUnpack(String... patterns) {
this.requiresUnpack.include(patterns);
}
void requiresUnpack(Spec spec) {
this.requiresUnpack.include(spec);
}
boolean isExcludeDevtools() {
return this.excludeDevtools;
}
void setExcludeDevtools(boolean excludeDevtools) {
this.excludeDevtools = excludeDevtools;
configureExclusions();
}
void excludeNonZipLibraryFiles(FileCopyDetails details) {
if (this.librarySpec.isSatisfiedBy(details)) {
excludeNonZipFiles(details);
}
}
void excludeNonZipFiles(FileCopyDetails details) {
if (!isZip(details.getFile())) {
details.exclude();
}
}
private boolean isZip(File file) {
try {
try (FileInputStream fileInputStream = new FileInputStream(file)) {
return isZip(fileInputStream);
}
}
catch (IOException ex) {
return false;
}
}
private boolean isZip(InputStream inputStream) throws IOException {
for (byte headerByte : ZIP_FILE_HEADER) {
if (inputStream.read() != headerByte) {
return false;
}
}
return true;
}
private void configureExclusions() {
Set excludes = new HashSet<>();
if (this.excludeDevtools) {
excludes.add("**/spring-boot-devtools-*.jar");
}
this.exclusions.setExcludes(excludes);
}
void moveModuleInfoToRoot(CopySpec spec) {
spec.filesMatching("module-info.class", BootArchiveSupport::moveToRoot);
}
private static void moveToRoot(FileCopyDetails details) {
details.setRelativePath(details.getRelativeSourcePath());
}
/**
* {@link CopyAction} variant that sorts entries to ensure reproducible ordering.
*/
private static final class ReproducibleOrderingCopyAction implements CopyAction {
private final CopyAction delegate;
private ReproducibleOrderingCopyAction(CopyAction delegate) {
this.delegate = delegate;
}
@Override
public WorkResult execute(CopyActionProcessingStream stream) {
return this.delegate.execute((action) -> {
Map detailsByPath = new TreeMap<>();
stream.process((details) -> detailsByPath.put(details.getRelativePath(), details));
detailsByPath.values().forEach(action::processFile);
});
}
}
}