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/*
* Copyright (C) 2024 NotEnoughUpdates contributors
*
* This file is part of NotEnoughUpdates.
*
* NotEnoughUpdates is free software: you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, either
* version 3 of the License, or (at your option) any later version.
*
* NotEnoughUpdates is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with NotEnoughUpdates. If not, see <https://www.gnu.org/licenses/>.
*/
package io.github.moulberry.notenoughupdates.loader;
import lombok.SneakyThrows;
import net.minecraft.launchwrapper.ITweaker;
import net.minecraft.launchwrapper.Launch;
import net.minecraft.launchwrapper.LaunchClassLoader;
import org.jetbrains.annotations.Nullable;
import java.io.File;
import java.net.URI;
import java.nio.file.FileSystem;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Objects;
import java.util.stream.Stream;
/**
* Tweaker used to load library JARs conditionally. See the subclasses for concrete implementations.
*/
public abstract class JARLoadingTweaker implements ITweaker {
/**
* @return a path pointing to a folder filled with JAR files
*/
protected abstract Path getFilesToLoad();
protected abstract String getTestClass();
@SneakyThrows
protected @Nullable Path getShadowedElement(String path) {
URI uri = Objects.requireNonNull(getClass().getResource(path)).toURI();
if ("jar".equals(uri.getScheme())) {
FileSystem fs = FileSystems.newFileSystem(uri, Collections.emptyMap());
closeFileSystemLater(fs);
return fs.getPath(path);
} else {
return Paths.get(uri);
}
}
private List<FileSystem> toClose = new ArrayList<>();
protected void closeFileSystemLater(FileSystem fileSystem) {
toClose.add(fileSystem);
}
@Override
public void acceptOptions(List<String> args, File gameDir, File assetsDir, String profile) {
}
protected void performLoading(LaunchClassLoader classLoader) {
try {
if (Launch.blackboard.get("fml.deobfuscatedEnvironment") == Boolean.TRUE) {
System.out.println("Skipping JAR loading in development environment.");
return;
}
Path p = getFilesToLoad();
System.out.println("Loading a JAR from " + p.toAbsolutePath());
Path tempDirectory = Files.createTempDirectory("notenoughupdates-extracted-" + getClass().getSimpleName());
System.out.println("Using temporary directory " + tempDirectory + " to store extracted jars.");
tempDirectory.toFile().deleteOnExit();
try (Stream<Path> libraries = Files.walk(p, 1)) {
libraries.filter(it -> it.getFileName().toString().toLowerCase(Locale.ROOT).endsWith(".jar"))
.forEach(it -> {
try {
Path extractedPath = tempDirectory.resolve(it.getFileName().toString());
extractedPath.toFile().deleteOnExit();
Files.copy(it, extractedPath);
ClassLoaderExtUtil.addClassSourceTwice(classLoader, extractedPath.toUri().toURL());
} catch (Exception e) {
throw new RuntimeException(e);
}
});
}
classLoader.loadClass(getTestClass());
System.out.println("Could successfully load a class from loaded library.");
} catch (Throwable e) {
System.err.println("Failed to load a JAR into NEU. This is most likely a bad thing.");
e.printStackTrace();
} finally {
Iterator<FileSystem> iterator = toClose.iterator();
while (iterator.hasNext())
try {
iterator.next().close();
} catch (Throwable e) {
e.printStackTrace();
} finally {
iterator.remove();
}
}
}
@Override
public String getLaunchTarget() {
return null;
}
@Override
public String[] getLaunchArguments() {
return new String[0];
}
}
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