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Elasticsearch subproject :libs:elasticsearch-core
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.jdk;
import org.elasticsearch.core.SuppressForbidden;
import java.io.IOException;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
public class JdkJarHellCheck {
private JdkJarHellCheck() {}
private Set detected = new HashSet<>();
private void scanForJDKJarHell(Path root) throws IOException {
// system.parent = extensions loader.
// note: for jigsaw, this evilness will need modifications (e.g. use jrt filesystem!)
ClassLoader ext = ClassLoader.getSystemClassLoader().getParent();
assert ext != null;
Files.walkFileTree(root, new SimpleFileVisitor() {
@Override
public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {
String entry = root.relativize(file).toString().replace('\\', '/');
if (entry.endsWith(".class") && entry.endsWith("module-info.class") == false) {
if (ext.getResource(entry) != null) {
detected.add(entry.replace("/", ".").replace(".class", ""));
}
}
return FileVisitResult.CONTINUE;
}
});
}
public Set getDetected() {
return Collections.unmodifiableSet(detected);
}
@SuppressForbidden(reason = "command line tool")
public static void main(String[] argv) throws IOException {
JdkJarHellCheck checker = new JdkJarHellCheck();
for (String location : argv) {
Path path = Paths.get(location);
if (Files.exists(path) == false) {
throw new IllegalArgumentException("Path does not exist: " + path);
}
checker.scanForJDKJarHell(path);
}
if (checker.getDetected().isEmpty()) {
System.exit(0);
} else {
checker.getDetected().forEach(System.out::println);
System.exit(1);
}
}
}
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