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Mods must ship a separate Jar-file (for example via jar-in-jar) and mark it as FMLModType: LIBRARY to make it load above the GAME layer. They then must provide an implementation of ICoreMod via the Java ServiceLoader to contribute their transformers. --------- Co-authored-by: Matyrobbrt <[email protected]>
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loader/src/main/java/net/neoforged/fml/loading/CoreModScriptLoader.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| /* | ||
| * Copyright (c) NeoForged and contributors | ||
| * SPDX-License-Identifier: LGPL-2.1-only | ||
| */ | ||
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| package net.neoforged.fml.loading; | ||
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| import cpw.mods.modlauncher.api.ITransformer; | ||
| import java.io.IOException; | ||
| import java.io.Reader; | ||
| import java.nio.file.Files; | ||
| import java.util.List; | ||
| import net.neoforged.coremod.CoreModScriptingEngine; | ||
| import net.neoforged.coremod.ICoreModScriptSource; | ||
| import net.neoforged.fml.loading.moddiscovery.CoreModFile; | ||
| import net.neoforged.fml.loading.moddiscovery.ModFileInfo; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| /** | ||
| * Uses the coremod scripting engine from https://github.com/neoforged/CoreMods | ||
| * to load JS-based coremods. Avoids loading any of the classes unless a mod | ||
| * contains a JS-based coremod. | ||
| */ | ||
| class CoreModScriptLoader { | ||
| private static final Logger LOGGER = LoggerFactory.getLogger(CoreModScriptLoader.class); | ||
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| private CoreModScriptLoader() {} | ||
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| /** | ||
| * Enumerate script-based coremods. | ||
| */ | ||
| public static List<ITransformer<?>> loadCoreModScripts(List<ModFileInfo> modFileInfos) { | ||
| CoreModScriptingEngine engine; | ||
| try { | ||
| engine = new CoreModScriptingEngine(); | ||
| } catch (NoClassDefFoundError e) { | ||
| // Fail for all mods that require a coremod scripting engine to be present | ||
| throw new IllegalStateException("Could not find the coremod script-engine, but the following mods require it: " + modFileInfos, e); | ||
| } | ||
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| LOGGER.debug(LogMarkers.CORE, "Loading coremod scripts"); | ||
| for (var modFile : modFileInfos) { | ||
| for (var coreMod : modFile.getFile().getCoreMods()) { | ||
| engine.loadCoreMod(new ScriptSourceAdapter(coreMod)); | ||
| } | ||
| } | ||
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| return engine.initializeCoreMods(); | ||
| } | ||
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| private record ScriptSourceAdapter(CoreModFile coreMod) implements ICoreModScriptSource { | ||
| @Override | ||
| public Reader readCoreMod() throws IOException { | ||
| return Files.newBufferedReader(coreMod.path()); | ||
| } | ||
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| @Override | ||
| public String getDebugSource() { | ||
| return coreMod.path().toString(); | ||
| } | ||
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| @Override | ||
| public Reader getAdditionalFile(final String fileName) throws IOException { | ||
| return Files.newBufferedReader(coreMod.file().findResource(fileName)); | ||
| } | ||
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| @Override | ||
| public String getOwnerId() { | ||
| return this.coreMod.file().getModInfos().getFirst().getModId(); | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return "{Name: " + coreMod.name() + ", Owner: " + getOwnerId() + " @ " + getDebugSource() + "}"; | ||
| } | ||
| } | ||
| } |
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