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RuntimeModRemapper.java
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RuntimeModRemapper.java
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/*
* Copyright 2016 FabricMC
*
* 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 net.fabricmc.loader.impl.discovery;
import java.io.File;
import java.io.IOException;
import java.net.URISyntaxException;
import java.nio.charset.StandardCharsets;
import java.nio.file.FileSystem;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.jar.Attributes;
import java.util.jar.Manifest;
import java.util.stream.Collectors;
import org.objectweb.asm.commons.Remapper;
import net.fabricmc.accesswidener.AccessWidener;
import net.fabricmc.accesswidener.AccessWidenerClassVisitor;
import net.fabricmc.accesswidener.AccessWidenerReader;
import net.fabricmc.accesswidener.AccessWidenerRemapper;
import net.fabricmc.accesswidener.AccessWidenerWriter;
import net.fabricmc.loader.impl.FabricLoaderImpl;
import net.fabricmc.loader.impl.FormattedException;
import net.fabricmc.loader.impl.launch.FabricLauncher;
import net.fabricmc.loader.impl.launch.FabricLauncherBase;
import net.fabricmc.loader.impl.util.FileSystemUtil;
import net.fabricmc.loader.impl.util.ManifestUtil;
import net.fabricmc.loader.impl.util.SystemProperties;
import net.fabricmc.loader.impl.util.log.Log;
import net.fabricmc.loader.impl.util.log.LogCategory;
import net.fabricmc.tinyremapper.InputTag;
import net.fabricmc.tinyremapper.NonClassCopyMode;
import net.fabricmc.tinyremapper.OutputConsumerPath;
import net.fabricmc.tinyremapper.TinyRemapper;
import net.fabricmc.tinyremapper.TinyUtils;
import net.fabricmc.tinyremapper.extension.mixin.MixinExtension;
public final class RuntimeModRemapper {
private static final String REMAP_TYPE_MANIFEST_KEY = "Fabric-Loom-Mixin-Remap-Type";
private static final String REMAP_TYPE_STATIC = "static";
private static final String SOURCE_NAMESPACE = "intermediary";
public static void remap(Collection<ModCandidateImpl> modCandidates, Path tmpDir, Path outputDir) {
List<ModCandidateImpl> modsToRemap = new ArrayList<>();
Set<InputTag> remapMixins = new HashSet<>();
for (ModCandidateImpl mod : modCandidates) {
if (mod.getRequiresRemap()) {
modsToRemap.add(mod);
}
}
if (modsToRemap.isEmpty()) return;
Map<ModCandidateImpl, RemapInfo> infoMap = new HashMap<>();
TinyRemapper remapper = null;
try {
FabricLauncher launcher = FabricLauncherBase.getLauncher();
AccessWidener mergedAccessWidener = new AccessWidener();
mergedAccessWidener.visitHeader(SOURCE_NAMESPACE);
for (ModCandidateImpl mod : modsToRemap) {
RemapInfo info = new RemapInfo();
infoMap.put(mod, info);
if (mod.hasPath()) {
List<Path> paths = mod.getPaths();
if (paths.size() != 1) throw new UnsupportedOperationException("multiple path for "+mod);
info.inputPath = paths.get(0);
} else {
info.inputPath = mod.copyToDir(tmpDir, true);
info.inputIsTemp = true;
}
info.outputPath = outputDir.resolve(mod.getDefaultFileName());
Files.deleteIfExists(info.outputPath);
String accessWidener = mod.getMetadata().getAccessWidener();
if (accessWidener != null) {
info.accessWidenerPath = accessWidener;
try (FileSystemUtil.FileSystemDelegate jarFs = FileSystemUtil.getJarFileSystem(info.inputPath, false)) {
FileSystem fs = jarFs.get();
info.accessWidener = Files.readAllBytes(fs.getPath(accessWidener));
} catch (Throwable t) {
throw new RuntimeException("Error reading access widener for mod '" +mod.getId()+ "'!", t);
}
new AccessWidenerReader(mergedAccessWidener).read(info.accessWidener);
}
}
remapper = TinyRemapper.newRemapper()
.withMappings(TinyUtils.createMappingProvider(launcher.getMappingConfiguration().getMappings(), SOURCE_NAMESPACE, launcher.getTargetNamespace()))
.renameInvalidLocals(false)
.extension(new MixinExtension(remapMixins::contains))
.extraAnalyzeVisitor((mrjVersion, className, next) ->
AccessWidenerClassVisitor.createClassVisitor(FabricLoaderImpl.ASM_VERSION, next, mergedAccessWidener)
)
.build();
try {
remapper.readClassPathAsync(getRemapClasspath().toArray(new Path[0]));
} catch (IOException e) {
throw new RuntimeException("Failed to populate remap classpath", e);
}
for (ModCandidateImpl mod : modsToRemap) {
RemapInfo info = infoMap.get(mod);
InputTag tag = remapper.createInputTag();
info.tag = tag;
if (requiresMixinRemap(info.inputPath)) {
remapMixins.add(tag);
}
remapper.readInputsAsync(tag, info.inputPath);
}
//Done in a 2nd loop as we need to make sure all the inputs are present before remapping
for (ModCandidateImpl mod : modsToRemap) {
RemapInfo info = infoMap.get(mod);
OutputConsumerPath outputConsumer = new OutputConsumerPath.Builder(info.outputPath).build();
FileSystemUtil.FileSystemDelegate delegate = FileSystemUtil.getJarFileSystem(info.inputPath, false);
if (delegate.get() == null) {
throw new RuntimeException("Could not open JAR file " + info.inputPath.getFileName() + " for NIO reading!");
}
Path inputJar = delegate.get().getRootDirectories().iterator().next();
outputConsumer.addNonClassFiles(inputJar, NonClassCopyMode.FIX_META_INF, remapper);
info.outputConsumerPath = outputConsumer;
remapper.apply(outputConsumer, info.tag);
}
//Done in a 3rd loop as this can happen when the remapper is doing its thing.
for (ModCandidateImpl mod : modsToRemap) {
RemapInfo info = infoMap.get(mod);
if (info.accessWidener != null) {
info.accessWidener = remapAccessWidener(info.accessWidener, remapper.getRemapper(), launcher.getTargetNamespace());
}
}
remapper.finish();
for (ModCandidateImpl mod : modsToRemap) {
RemapInfo info = infoMap.get(mod);
info.outputConsumerPath.close();
if (info.accessWidenerPath != null) {
try (FileSystemUtil.FileSystemDelegate jarFs = FileSystemUtil.getJarFileSystem(info.outputPath, false)) {
FileSystem fs = jarFs.get();
Files.delete(fs.getPath(info.accessWidenerPath));
Files.write(fs.getPath(info.accessWidenerPath), info.accessWidener);
}
}
mod.setPaths(Collections.singletonList(info.outputPath));
}
} catch (Throwable t) {
if (remapper != null) {
remapper.finish();
}
for (RemapInfo info : infoMap.values()) {
if (info.outputPath == null) {
continue;
}
try {
Files.deleteIfExists(info.outputPath);
} catch (IOException e) {
Log.warn(LogCategory.MOD_REMAP, "Error deleting failed output jar %s", info.outputPath, e);
}
}
throw new FormattedException("Failed to remap mods!", t);
} finally {
for (RemapInfo info : infoMap.values()) {
try {
if (info.inputIsTemp) Files.deleteIfExists(info.inputPath);
} catch (IOException e) {
Log.warn(LogCategory.MOD_REMAP, "Error deleting temporary input jar %s", info.inputIsTemp, e);
}
}
}
}
private static byte[] remapAccessWidener(byte[] input, Remapper remapper, String targetNamespace) {
AccessWidenerWriter writer = new AccessWidenerWriter();
AccessWidenerRemapper remappingDecorator = new AccessWidenerRemapper(writer, remapper, SOURCE_NAMESPACE, targetNamespace);
AccessWidenerReader accessWidenerReader = new AccessWidenerReader(remappingDecorator);
accessWidenerReader.read(input, SOURCE_NAMESPACE);
return writer.write();
}
private static List<Path> getRemapClasspath() throws IOException {
String remapClasspathFile = System.getProperty(SystemProperties.REMAP_CLASSPATH_FILE);
if (remapClasspathFile == null) {
throw new RuntimeException("No remapClasspathFile provided");
}
String content = new String(Files.readAllBytes(Paths.get(remapClasspathFile)), StandardCharsets.UTF_8);
return Arrays.stream(content.split(File.pathSeparator))
.map(Paths::get)
.collect(Collectors.toList());
}
private static boolean requiresMixinRemap(Path inputPath) throws IOException, URISyntaxException {
final Manifest manifest = ManifestUtil.readManifest(inputPath);
final Attributes mainAttributes = manifest.getMainAttributes();
return REMAP_TYPE_STATIC.equalsIgnoreCase(mainAttributes.getValue(REMAP_TYPE_MANIFEST_KEY));
}
private static class RemapInfo {
InputTag tag;
Path inputPath;
Path outputPath;
boolean inputIsTemp;
OutputConsumerPath outputConsumerPath;
String accessWidenerPath;
byte[] accessWidener;
}
}