Upstream/Minestom
1
0
Fork 0
mirror of https://github.com/Minestom/Minestom.git synced 2024-12-26 02:57:37 +01:00
Code Issues Projects Releases Wiki Activity

Very basic Mixin support

Browse Source
This commit is contained in:
jglrxavpok 2020-08-23 22:38:27 +02:00
parent 223af361d8
commit 26b8ad125e
21 changed files with 599 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
build.gradle
View File

@ -30,6 +30,10 @@ allprojects {
mavenCentral()
maven { url 'https://libraries.minecraft.net' }
maven { url 'https://jitpack.io' }
maven {
name 'sponge'
url 'http://repo.spongepowered.org/maven'
}
}
}
@ -112,8 +116,13 @@ dependencies {
annotationProcessor 'org.projectlombok:lombok:1.18.12'
// Code modification
api "org.ow2.asm:asm:6.2.1"
api "org.ow2.asm:asm-tree:6.2.1"
api "org.ow2.asm:asm:${asmVersion}"
api "org.ow2.asm:asm-tree:${asmVersion}"
api "org.ow2.asm:asm-analysis:${asmVersion}"
api "org.ow2.asm:asm-util:${asmVersion}"
api "org.ow2.asm:asm-commons:${asmVersion}"
implementation 'com.google.guava:guava:21.0'
api "org.spongepowered:mixin:${mixinVersion}"
// Path finding
api 'com.github.MadMartian:hydrazine-path-finding:1.3.1'

2
gradle.properties Normal file
View File

@ -0,0 +1,2 @@
asmVersion=8.0.1
mixinVersion=0.8

30
src/main/java/net/minestom/server/Bootstrap.java
View File

@ -1,9 +1,16 @@
package net.minestom.server;
import net.minestom.server.extras.selfmodification.MinestomOverwriteClassLoader;
import net.minestom.server.extras.selfmodification.mixins.MixinCodeModifier;
import org.spongepowered.asm.launch.MixinBootstrap;
import org.spongepowered.asm.launch.platform.CommandLineOptions;
import org.spongepowered.asm.launch.platform.MixinPlatformManager;
import org.spongepowered.asm.mixin.MixinEnvironment;
import org.spongepowered.asm.mixin.Mixins;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Arrays;
/**
* Used to launch Minestom with the {@link MinestomOverwriteClassLoader} to allow for self-modifications
@ -12,13 +19,17 @@ public class Bootstrap {
public static void bootstrap(String mainClassFullName, String[] args) {
try {
ClassLoader classLoader = new MinestomOverwriteClassLoader(Bootstrap.class.getClassLoader());
ClassLoader classLoader = MinestomOverwriteClassLoader.getInstance();
startMixin(args);
MixinEnvironment.init(MixinEnvironment.Phase.INIT);
MinestomOverwriteClassLoader.getInstance().addCodeModifier(new MixinCodeModifier());
// ensure extensions are loaded when starting the server
Class<?> serverClass = classLoader.loadClass("net.minestom.server.MinecraftServer");
Method init = serverClass.getMethod("init");
init.invoke(null);
Class<?> mainClass = classLoader.loadClass(mainClassFullName);
Method main = mainClass.getDeclaredMethod("main", String[].class);
main.invoke(null, new Object[] { args });
@ -26,4 +37,21 @@ public class Bootstrap {
e.printStackTrace();
}
}
private static void startMixin(String[] args) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
Method start = MixinBootstrap.class.getDeclaredMethod("start");
start.setAccessible(true);
if (! ((boolean)start.invoke(null)) ) {
return;
}
Method doInit = MixinBootstrap.class.getDeclaredMethod("doInit", CommandLineOptions.class);
doInit.setAccessible(true);
doInit.invoke(null, CommandLineOptions.ofArgs(Arrays.asList(args)));
MixinBootstrap.getPlatform().inject();
Mixins.getConfigs().forEach(c -> {
MinestomOverwriteClassLoader.getInstance().protectedPackages.add(c.getConfig().getMixinPackage());
});
}
}

123
src/main/java/net/minestom/server/extras/selfmodification/MinestomOverwriteClassLoader.java
View File

@ -7,11 +7,13 @@ import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.tree.ClassNode;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
@ -19,14 +21,25 @@ import java.util.Set;
@Slf4j
public class MinestomOverwriteClassLoader extends URLClassLoader {
private static MinestomOverwriteClassLoader INSTANCE;
/**
* Classes that cannot be loaded/modified by this classloader.
* Will go through parent class loader
*/
private static final Set<String> protectedClasses = Set.of(
"net.minestom.server.extras.selfmodification.CodeModifier",
"net.minestom.server.extras.selfmodification.MinestomOverwriteClassLoader"
);
public final Set<String> protectedClasses = new HashSet<>() {
{
add("net.minestom.server.extras.selfmodification.CodeModifier");
add("net.minestom.server.extras.selfmodification.MinestomOverwriteClassLoader");
}
};
public final Set<String> protectedPackages = new HashSet<>() {
{
add("com.google");
add("com.mojang");
add("org.objectweb.asm");
}
};
private final URLClassLoader asmClassLoader;
// TODO: replace by tree to optimize lookup times. We can use the fact that package names are split with '.' to allow for fast lookup
@ -38,7 +51,7 @@ public class MinestomOverwriteClassLoader extends URLClassLoader {
private final Method findParentLoadedClass;
private final Class<?> loadedCodeModifier;
public MinestomOverwriteClassLoader(ClassLoader parent) {
private MinestomOverwriteClassLoader(ClassLoader parent) {
super("Minestom ClassLoader", loadURLs(), parent);
try {
findParentLoadedClass = ClassLoader.class.getDeclaredMethod("findLoadedClass", String.class);
@ -58,6 +71,17 @@ public class MinestomOverwriteClassLoader extends URLClassLoader {
asmClassLoader = newChild(new URL[0]);
}
public static MinestomOverwriteClassLoader getInstance() {
if(INSTANCE == null) {
synchronized (MinestomOverwriteClassLoader.class) {
if(INSTANCE == null) {
INSTANCE = new MinestomOverwriteClassLoader(MinestomOverwriteClassLoader.class.getClassLoader());
}
}
}
return INSTANCE;
}
private static URL[] loadURLs() {
String classpath = System.getProperty("java.class.path");
String[] parts = classpath.split(";");
@ -110,9 +134,7 @@ public class MinestomOverwriteClassLoader extends URLClassLoader {
return super.loadClass(name, resolve);
}
String path = name.replace(".", "/") + ".class";
byte[] bytes = getResourceAsStream(path).readAllBytes();
return transformAndLoad(name, bytes, resolve);
return define(name, loadBytes(name, true), resolve);
} catch (Exception ex) {
log.trace("Fail to load class, resorting to parent loader: "+name, ex);
// fail to load class, let parent load
@ -123,32 +145,17 @@ public class MinestomOverwriteClassLoader extends URLClassLoader {
}
private boolean isProtected(String name) {
return protectedClasses.contains(name);
if(!protectedClasses.contains(name)) {
for(String start : protectedPackages) {
if(name.startsWith(start))
return true;
}
return false;
}
return true;
}
private Class<?> transformAndLoad(String name, byte[] bytes, boolean resolve) throws ClassNotFoundException {
ClassReader reader = new ClassReader(bytes);
ClassNode node = new ClassNode();
reader.accept(node, 0);
boolean modified = false;
synchronized (modifiers) {
for(CodeModifier modifier : modifiers) {
boolean shouldModify = modifier.getNamespace() == null || name.startsWith(modifier.getNamespace());
if(shouldModify) {
modified |= modifier.transform(node);
}
}
}
if(modified) {
ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_FRAMES) {
@Override
protected ClassLoader getClassLoader() {
return asmClassLoader;
}
};
node.accept(writer);
bytes = writer.toByteArray();
}
private Class<?> define(String name, byte[] bytes, boolean resolve) throws ClassNotFoundException {
Class<?> defined = defineClass(name, bytes, 0, bytes.length);
log.trace("Loaded with code modifiers: "+name);
if(resolve) {
@ -157,6 +164,46 @@ public class MinestomOverwriteClassLoader extends URLClassLoader {
return defined;
}
public byte[] loadBytes(String name, boolean transform) throws IOException {
String path = name.replace(".", "/") + ".class";
byte[] bytes = getResourceAsStream(path).readAllBytes();
if(transform && !isProtected(name)) {
ClassReader reader = new ClassReader(bytes);
ClassNode node = new ClassNode();
reader.accept(node, 0);
boolean modified = false;
synchronized (modifiers) {
for(CodeModifier modifier : modifiers) {
boolean shouldModify = modifier.getNamespace() == null || name.startsWith(modifier.getNamespace());
if(shouldModify) {
modified |= modifier.transform(node);
}
}
}
if(modified) {
ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_FRAMES) {
@Override
protected ClassLoader getClassLoader() {
return asmClassLoader;
}
};
node.accept(writer);
bytes = writer.toByteArray();
log.trace("Modified "+name);
}
}
return bytes;
}
@Override
public Class<?> findClass(String name) throws ClassNotFoundException {
return super.findClass(name);
}
public void resolve(Class<?> clazz) {
resolveClass(clazz);
}
@NotNull
public URLClassLoader newChild(@NotNull URL[] urls) {
return URLClassLoader.newInstance(urls, this);
@ -174,11 +221,21 @@ public class MinestomOverwriteClassLoader extends URLClassLoader {
CodeModifier modifier = (CodeModifier) modifierClass.getDeclaredConstructor().newInstance();
synchronized (modifiers) {
log.warn("Added Code modifier: "+modifier);
modifiers.add(modifier);
addCodeModifier(modifier);
}
}
} catch (MalformedURLException | ClassNotFoundException | InvocationTargetException | InstantiationException | IllegalAccessException | NoSuchMethodException e) {
e.printStackTrace();
}
}
public void addCodeModifier(CodeModifier modifier) {
synchronized (modifiers) {
modifiers.add(modifier);
}
}
public List<CodeModifier> getModifiers() {
return modifiers;
}
}

68
src/main/java/net/minestom/server/extras/selfmodification/mixins/GlobalPropertyServiceMinestom.java Normal file
View File

@ -0,0 +1,68 @@
package net.minestom.server.extras.selfmodification.mixins;
import org.spongepowered.asm.service.IGlobalPropertyService;
import org.spongepowered.asm.service.IPropertyKey;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
public class GlobalPropertyServiceMinestom implements IGlobalPropertyService {
private class BasicProperty implements IPropertyKey {
private final String name;
public BasicProperty(String name) {
this.name = name;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
BasicProperty that = (BasicProperty) o;
return Objects.equals(name, that.name);
}
@Override
public int hashCode() {
return Objects.hash(name);
}
@Override
public String toString() {
return "BasicProperty{" +
"name='" + name + '\'' +
'}';
}
}
private final Map<String, IPropertyKey> keys = new HashMap<>();
private final Map<IPropertyKey, Object> values = new HashMap<>();
@Override
public IPropertyKey resolveKey(String name) {
return keys.computeIfAbsent(name, k -> new BasicProperty(k));
}
@Override
public <T> T getProperty(IPropertyKey key) {
return (T) values.get(key);
}
@Override
public void setProperty(IPropertyKey key, Object value) {
values.put(key, value);
}
@Override
public <T> T getProperty(IPropertyKey key, T defaultValue) {
return (T) values.getOrDefault(key, defaultValue);
}
@Override
public String getPropertyString(IPropertyKey key, String defaultValue) {
return (String) values.getOrDefault(key, defaultValue);
}
}

38
src/main/java/net/minestom/server/extras/selfmodification/mixins/MinestomBytecodeProvider.java Normal file
View File

@ -0,0 +1,38 @@
package net.minestom.server.extras.selfmodification.mixins;
import net.minestom.server.extras.selfmodification.MinestomOverwriteClassLoader;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.tree.ClassNode;
import org.spongepowered.asm.service.IClassBytecodeProvider;
import java.io.IOException;
public class MinestomBytecodeProvider implements IClassBytecodeProvider {
private final MinestomOverwriteClassLoader classLoader;
public MinestomBytecodeProvider(MinestomOverwriteClassLoader classLoader) {
this.classLoader = classLoader;
}
@Override
public ClassNode getClassNode(String name) throws ClassNotFoundException, IOException {
return getClassNode(name, false);
}
private ClassNode loadNode(String name, boolean transform) throws ClassNotFoundException {
ClassNode node = new ClassNode();
ClassReader reader;
try {
reader = new ClassReader(classLoader.loadBytes(name, transform));
} catch (IOException e) {
throw new ClassNotFoundException("Could not load ClassNode with name "+name, e);
}
reader.accept(node, 0);
return node;
}
@Override
public ClassNode getClassNode(String name, boolean runTransformers) throws ClassNotFoundException, IOException {
return loadNode(name, runTransformers);
}
}

34
src/main/java/net/minestom/server/extras/selfmodification/mixins/MinestomClassProvider.java Normal file
View File

@ -0,0 +1,34 @@
package net.minestom.server.extras.selfmodification.mixins;
import net.minestom.server.extras.selfmodification.MinestomOverwriteClassLoader;
import org.spongepowered.asm.service.IClassProvider;
import java.net.URL;
public class MinestomClassProvider implements IClassProvider {
private final MinestomOverwriteClassLoader classLoader;
public MinestomClassProvider(MinestomOverwriteClassLoader classLoader) {
this.classLoader = classLoader;
}
@Override
public URL[] getClassPath() {
return classLoader.getURLs();
}
@Override
public Class<?> findClass(String name) throws ClassNotFoundException {
return classLoader.findClass(name);
}
@Override
public Class<?> findClass(String name, boolean initialize) throws ClassNotFoundException {
return Class.forName(name, initialize, Thread.currentThread().getContextClassLoader());
}
@Override
public Class<?> findAgentClass(String name, boolean initialize) throws ClassNotFoundException {
return Class.forName(name, initialize, classLoader);
}
}

75
src/main/java/net/minestom/server/extras/selfmodification/mixins/MinestomTransformerProvider.java Normal file
View File

@ -0,0 +1,75 @@
package net.minestom.server.extras.selfmodification.mixins;
import net.minestom.server.extras.selfmodification.CodeModifier;
import net.minestom.server.extras.selfmodification.MinestomOverwriteClassLoader;
import org.objectweb.asm.tree.ClassNode;
import org.spongepowered.asm.service.ITransformer;
import org.spongepowered.asm.service.ITransformerProvider;
import org.spongepowered.asm.service.ITreeClassTransformer;
import java.lang.reflect.InvocationTargetException;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
public class MinestomTransformerProvider implements ITransformerProvider {
private final MinestomOverwriteClassLoader classLoader;
private List<ITransformer> transformers;
public MinestomTransformerProvider(MinestomOverwriteClassLoader classLoader) {
this.classLoader = classLoader;
}
@Override
public void addTransformerExclusion(String name) {
classLoader.protectedClasses.add(name);
}
@Override
public Collection<ITransformer> getTransformers() {
return getDelegatedTransformers();
}
@Override
public Collection<ITransformer> getDelegatedTransformers() {
if(transformers == null) {
transformers = buildTransformerList();
}
return transformers;
}
private List<ITransformer> buildTransformerList() {
List<ITransformer> result = new LinkedList<>();
for(CodeModifier modifier : classLoader.getModifiers()) {
result.add(toMixin(modifier));
}
try {
Class<?> clazz = classLoader.loadClass("org.spongepowered.asm.mixin.transformer.MixingTransformer");
ITransformer mixinTransformer = (ITransformer) clazz.getDeclaredConstructor().newInstance();
result.add(mixinTransformer);
} catch (ClassNotFoundException | InstantiationException | InvocationTargetException | NoSuchMethodException | IllegalAccessException e) {
e.printStackTrace();
}
return result;
}
private ITransformer toMixin(CodeModifier modifier) {
return new ITreeClassTransformer() {
@Override
public boolean transformClassNode(String name, String transformedName, ClassNode classNode) {
return modifier.transform(classNode);
}
@Override
public String getName() {
return modifier.getClass().getName();
}
@Override
public boolean isDelegationExcluded() {
return false;
}
};
}
}

59
src/main/java/net/minestom/server/extras/selfmodification/mixins/MixinCodeModifier.java Normal file
View File

@ -0,0 +1,59 @@
package net.minestom.server.extras.selfmodification.mixins;
import net.minestom.server.extras.selfmodification.CodeModifier;
import org.objectweb.asm.tree.ClassNode;
import org.spongepowered.asm.mixin.MixinEnvironment;
import org.spongepowered.asm.mixin.transformer.MixinProcessor;
import org.spongepowered.asm.mixin.transformer.ext.Extensions;
import org.spongepowered.asm.mixin.transformer.ext.IHotSwap;
import org.spongepowered.asm.service.ISyntheticClassInfo;
import org.spongepowered.asm.service.ISyntheticClassRegistry;
import org.spongepowered.asm.transformers.TreeTransformer;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
public class MixinCodeModifier extends CodeModifier {
private Method transformClassMethod;
private TreeTransformer processor;
public MixinCodeModifier() {
try {
Class<?> mixinTransformerClass = Class.forName("org.spongepowered.asm.mixin.transformer.MixinTransformer");
Constructor<?> ctor = mixinTransformerClass.getDeclaredConstructor();
ctor.setAccessible(true);
this.processor = (TreeTransformer) ctor.newInstance();
transformClassMethod = mixinTransformerClass.getDeclaredMethod("transformClass", MixinEnvironment.class, String.class, ClassNode.class);
transformClassMethod.setAccessible(true);
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InstantiationException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
}
@Override
public boolean transform(ClassNode source) {
try {
return (boolean) transformClassMethod.invoke(processor, MixinEnvironment.getEnvironment(MixinEnvironment.Phase.DEFAULT), source.name.replace("/", "."), source);
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}
return false;
}
@Override
public String getNamespace() {
return null;
}
}

29
src/main/java/net/minestom/server/extras/selfmodification/mixins/MixinPlatformAgentMinestom.java Normal file
View File

@ -0,0 +1,29 @@
package net.minestom.server.extras.selfmodification.mixins;
import org.spongepowered.asm.launch.platform.IMixinPlatformServiceAgent;
import org.spongepowered.asm.launch.platform.MixinPlatformAgentAbstract;
import org.spongepowered.asm.launch.platform.MixinPlatformManager;
import org.spongepowered.asm.launch.platform.container.IContainerHandle;
import org.spongepowered.asm.util.Constants;
import java.util.Collection;
public class MixinPlatformAgentMinestom extends MixinPlatformAgentAbstract implements IMixinPlatformServiceAgent {
@Override
public void init() { }
@Override
public String getSideName() {
return Constants.SIDE_SERVER;
}
@Override
public AcceptResult accept(MixinPlatformManager manager, IContainerHandle handle) {
return AcceptResult.ACCEPTED;
}
@Override
public Collection<IContainerHandle> getMixinContainers() {
return null;
}
}

86
src/main/java/net/minestom/server/extras/selfmodification/mixins/MixinServiceMinestom.java Normal file
View File

@ -0,0 +1,86 @@
package net.minestom.server.extras.selfmodification.mixins;
import net.minestom.server.extras.selfmodification.MinestomOverwriteClassLoader;
import org.spongepowered.asm.launch.platform.container.ContainerHandleVirtual;
import org.spongepowered.asm.launch.platform.container.IContainerHandle;
import org.spongepowered.asm.mixin.MixinEnvironment;
import org.spongepowered.asm.service.*;
import org.spongepowered.asm.util.IConsumer;
import java.io.InputStream;
import java.util.Collection;
import java.util.Collections;
public class MixinServiceMinestom extends MixinServiceAbstract {
private final MinestomOverwriteClassLoader classLoader;
private final MinestomClassProvider classProvider;
private final MinestomBytecodeProvider bytecodeProvider;
private final MinestomTransformerProvider transformerProvider;
public MixinServiceMinestom() {
this.classLoader = MinestomOverwriteClassLoader.getInstance();
classProvider = new MinestomClassProvider(classLoader);
bytecodeProvider = new MinestomBytecodeProvider(classLoader);
transformerProvider = new MinestomTransformerProvider(classLoader);
}
@Override
public String getName() {
return "Minestom";
}
@Override
public boolean isValid() {
return true;
}
@Override
public IClassProvider getClassProvider() {
return classProvider;
}
@Override
public IClassBytecodeProvider getBytecodeProvider() {
return bytecodeProvider;
}
@Override
public ITransformerProvider getTransformerProvider() {
return transformerProvider;
}
@Override
public Collection<String> getPlatformAgents() {
return Collections.singletonList("net.minestom.server.extras.selfmodification.mixins.MixinPlatformAgentMinestom");
}
@Override
public IContainerHandle getPrimaryContainer() {
return new ContainerHandleVirtual("Minestom");
}
@Override
public InputStream getResourceAsStream(String name) {
return classLoader.getResourceAsStream(name);
}
// TODO: everything below
@Override
public IClassTracker getClassTracker() {
return null;
}
@Override
public IMixinAuditTrail getAuditTrail() {
return null;
}
@Override
public void wire(MixinEnvironment.Phase phase, IConsumer<MixinEnvironment.Phase> phaseConsumer) {
super.wire(phase, phaseConsumer);
phaseConsumer.accept(MixinEnvironment.Phase.PREINIT);
phaseConsumer.accept(MixinEnvironment.Phase.INIT);
}
}

20
src/main/java/net/minestom/server/extras/selfmodification/mixins/MixinServiceMinestomBootstrap.java Normal file
View File

@ -0,0 +1,20 @@
package net.minestom.server.extras.selfmodification.mixins;
import org.spongepowered.asm.service.IMixinServiceBootstrap;
public class MixinServiceMinestomBootstrap implements IMixinServiceBootstrap {
@Override
public String getName() {
return "MinestomBootstrap";
}
@Override
public String getServiceClassName() {
return "net.minestom.server.extras.selfmodification.mixins.MixinServiceMinestom";
}
@Override
public void bootstrap() {
}
}

1
src/main/resources/META-INF/services/org.spongepowered.asm.service.IGlobalPropertyService Normal file
View File

@ -0,0 +1 @@
net.minestom.server.extras.selfmodification.mixins.GlobalPropertyServiceMinestom

1
src/main/resources/META-INF/services/org.spongepowered.asm.service.IMixinService Normal file
View File

@ -0,0 +1 @@
net.minestom.server.extras.selfmodification.mixins.MixinServiceMinestom

1
src/main/resources/META-INF/services/org.spongepowered.asm.service.IMixinServiceBootstrap Normal file
View File

@ -0,0 +1 @@
net.minestom.server.extras.selfmodification.mixins.MixinServiceMinestomBootstrap

7
src/main/resources/log4j2.xml
View File

@ -2,13 +2,16 @@
<Configuration status="WARN" strict="true" name="Minestom">
<Appenders>
<Appender type="Console" name="STDOUT">
<Layout type="PatternLayout" pattern="[%t] [%d{HH:mm:ss}] %p - %m%n"/>
<Layout type="PatternLayout" pattern="[%t] [%d{HH:mm:ss}] - %p - %m%n"/>
</Appender>
<Appender type="Console" name="STDOUT-WithCaller">
<Layout type="PatternLayout" pattern="[%t] [%d{HH:mm:ss}] (%C{1}.%M) - %p - %m%n"/>
</Appender>
</Appenders>
<Loggers>
<Root level="trace">
<AppenderRef ref="STDOUT" level="info"/>
<AppenderRef ref="STDOUT-WithCaller" level="info"/>
</Root>
</Loggers>
</Configuration>

4
src/test/java/testextension/TestExtensionLauncher.java
View File

@ -1,12 +1,16 @@
package testextension;
import net.minestom.server.Bootstrap;
import org.spongepowered.asm.launch.MixinBootstrap;
import org.spongepowered.asm.mixin.Mixins;
// To launch with VM arguments:
// -Dminestom.extension.indevfolder.classes=build/classes/java/test/ -Dminestom.extension.indevfolder.resources=build/resources/test/
public class TestExtensionLauncher {
public static void main(String[] args) {
MixinBootstrap.init();
Mixins.addConfiguration("mixins.testextension.json");
Bootstrap.bootstrap("fr.themode.demo.MainDemo", args);
}

17
src/test/java/testextension/TestExtensionLauncherArgs.java Normal file
View File

@ -0,0 +1,17 @@
package testextension;
import net.minestom.server.Bootstrap;
// To launch with VM arguments:
// -Dminestom.extension.indevfolder.classes=build/classes/java/test/ -Dminestom.extension.indevfolder.resources=build/resources/test/
public class TestExtensionLauncherArgs {
public static void main(String[] args) {
String[] argsWithMixins = new String[args.length+2];
System.arraycopy(args, 0, argsWithMixins, 0, args.length);
argsWithMixins[argsWithMixins.length-2] = "--mixin";
argsWithMixins[argsWithMixins.length-1] = "mixins.testextension.json";
Bootstrap.bootstrap("fr.themode.demo.MainDemo", argsWithMixins);
}
}

2
src/test/java/testextension/TestModifier.java
View File

@ -10,7 +10,7 @@ public class TestModifier extends CodeModifier implements Opcodes {
@Override
public boolean transform(ClassNode source) {
if(source.name.equals("net/minestom/server/instance/InstanceContainer")) {
System.out.println("Modifying code source of "+source.name);
System.out.println("Modifying code of "+source.name);
MethodNode constructor = findConstructor(source.methods);
constructor.instructions.insert(constructor.instructions.getFirst(), buildInjectionCode());
return true;

18
src/test/java/testextension/mixins/InstanceContainerMixin.java Normal file
View File

@ -0,0 +1,18 @@
package testextension.mixins;
import net.minestom.server.instance.InstanceContainer;
import org.spongepowered.asm.mixin.Mixin;
import org.spongepowered.asm.mixin.injection.At;
import org.spongepowered.asm.mixin.injection.Inject;
import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
@Mixin(InstanceContainer.class)
public class InstanceContainerMixin {
@Inject(method = "<init>", at = @At("RETURN"))
private void onRunHead(CallbackInfo ci) {
System.out.println("Hello from Mixin!!!");
}
}

10
src/test/resources/mixins.testextension.json Normal file
View File

@ -0,0 +1,10 @@
{
"required": true,
"minVersion": "0.8",
"package": "testextension.mixins",
"target": "@env(DEFAULT)",
"compatibilityLevel": "JAVA_11",
"mixins": [
"InstanceContainerMixin"
]
}