org.springframework.boot.gradle.tasks.bundling.LoaderZipEntries 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.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.HashSet;
import java.util.Set;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import org.apache.commons.compress.archivers.zip.UnixStat;
import org.apache.commons.compress.archivers.zip.ZipArchiveEntry;
import org.apache.commons.compress.archivers.zip.ZipArchiveOutputStream;
import org.gradle.api.file.FileTreeElement;
import org.gradle.api.specs.Spec;
/**
* Internal utility used to copy entries from the {@code spring-boot-loader.jar}.
*
* @author Andy Wilkinson
* @author Phillip Webb
*/
class LoaderZipEntries {
private Long entryTime;
LoaderZipEntries(Long entryTime) {
this.entryTime = entryTime;
}
Spec writeTo(ZipArchiveOutputStream zipOutputStream) throws IOException {
WrittenDirectoriesSpec writtenDirectoriesSpec = new WrittenDirectoriesSpec();
try (ZipInputStream loaderJar = new ZipInputStream(
getClass().getResourceAsStream("/META-INF/loader/spring-boot-loader.jar"))) {
java.util.zip.ZipEntry entry = loaderJar.getNextEntry();
while (entry != null) {
if (entry.isDirectory() && !entry.getName().equals("META-INF/")) {
writeDirectory(new ZipArchiveEntry(entry), zipOutputStream);
writtenDirectoriesSpec.add(entry);
}
else if (entry.getName().endsWith(".class")) {
writeClass(new ZipArchiveEntry(entry), loaderJar, zipOutputStream);
}
entry = loaderJar.getNextEntry();
}
}
return writtenDirectoriesSpec;
}
private void writeDirectory(ZipArchiveEntry entry, ZipArchiveOutputStream out) throws IOException {
prepareEntry(entry, UnixStat.DIR_FLAG | UnixStat.DEFAULT_DIR_PERM);
out.putArchiveEntry(entry);
out.closeArchiveEntry();
}
private void writeClass(ZipArchiveEntry entry, ZipInputStream in, ZipArchiveOutputStream out) throws IOException {
prepareEntry(entry, UnixStat.FILE_FLAG | UnixStat.DEFAULT_FILE_PERM);
out.putArchiveEntry(entry);
copy(in, out);
out.closeArchiveEntry();
}
private void prepareEntry(ZipArchiveEntry entry, int unixMode) {
if (this.entryTime != null) {
entry.setTime(this.entryTime);
}
entry.setUnixMode(unixMode);
}
private void copy(InputStream in, OutputStream out) throws IOException {
byte[] buffer = new byte[4096];
int bytesRead = -1;
while ((bytesRead = in.read(buffer)) != -1) {
out.write(buffer, 0, bytesRead);
}
}
/**
* Spec to track directories that have been written.
*/
private static class WrittenDirectoriesSpec implements Spec {
private final Set entries = new HashSet<>();
@Override
public boolean isSatisfiedBy(FileTreeElement element) {
String path = element.getRelativePath().getPathString();
if (element.isDirectory() && !path.endsWith(("/"))) {
path += "/";
}
return this.entries.contains(path);
}
void add(ZipEntry entry) {
this.entries.add(entry.getName());
}
}
}