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author | nea <nea@nea.moe> | 2023-11-01 14:02:59 +0100 |
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committer | nea <nea@nea.moe> | 2023-11-01 14:02:59 +0100 |
commit | d5253dc5c3ae7b2cc1fcb96780e43b929a449eb4 (patch) | |
tree | 478973510c9d7eda999b8321a07f34691ba56e8b /src/main/java/moe/nea/modernjava/launch/FCPRelauncher.java | |
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Initial commit
Diffstat (limited to 'src/main/java/moe/nea/modernjava/launch/FCPRelauncher.java')
-rw-r--r-- | src/main/java/moe/nea/modernjava/launch/FCPRelauncher.java | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/src/main/java/moe/nea/modernjava/launch/FCPRelauncher.java b/src/main/java/moe/nea/modernjava/launch/FCPRelauncher.java new file mode 100644 index 0000000..ec27694 --- /dev/null +++ b/src/main/java/moe/nea/modernjava/launch/FCPRelauncher.java @@ -0,0 +1,102 @@ +package moe.nea.modernjava.launch; + +import net.minecraft.launchwrapper.Launch; +import net.minecraftforge.fml.common.launcher.FMLTweaker; +import net.minecraftforge.fml.nea.moe.modernjava.IAMFML; + +import java.io.File; +import java.io.FileDescriptor; +import java.io.FileOutputStream; +import java.io.IOException; +import java.lang.management.ManagementFactory; +import java.util.ArrayList; +import java.util.List; +import java.util.Map; + +public class FCPRelauncher { + public static void relaunch() { + + List<String> originalArgs = new ArrayList<>(); + + // Provided by FML + // This is highly processed so there might be some arguments that become lost, but almost everything should be in here. + // Namely non -- arguments get lost. I don't know any of these arguments that the vanilla launcher uses, so it should be fine? + // Also some tweakers are missing. But we can fix this. + Map<String, String> launchArgs = WellKnownBlackboard.launchArgs(); + if ("UnknownFMLProfile".equals(launchArgs.get("--version"))) { + launchArgs.remove("--version"); + } + for (Map.Entry<String, String> argument : launchArgs.entrySet()) { + originalArgs.add(argument.getKey()); + originalArgs.add(argument.getValue()); + } + + + originalArgs.add("--tweakClass"); + originalArgs.add(FMLTweaker.class.getName()); + + System.out.println("Reconstructed original minecraft arguments: " + originalArgs); + + String modernJavaPath = "/home/nea/.sdkman/candidates/java/16.0.2-tem/bin/java"; + + + String thisJarFile = FCPEntryPoint.class.getProtectionDomain().getCodeSource().getLocation().getFile(); + thisJarFile = "/home/nea/src/ModernJavaLauncher/target/build/libs/target.jar"; + System.out.println("Found modern java jar at: " + thisJarFile); + + System.out.println("Located modern minecraft at: " + modernJavaPath); + + ProcessBuilder processBuilder = new ProcessBuilder(); + processBuilder.inheritIO(); + processBuilder.directory(null); + + + List<String> moduleOpens = new ArrayList<>(); + moduleOpens.add("java.base/java.util=ALL-UNNAMED"); + moduleOpens.add("java.base/jdk.internal.loader=ALL-UNNAMED"); + moduleOpens.add("java.base/java.lang.reflect=ALL-UNNAMED"); + + + List<String> fullCommandLine = new ArrayList<>(); + fullCommandLine.add(modernJavaPath); + fullCommandLine.addAll(ManagementFactory.getRuntimeMXBean().getInputArguments()); + fullCommandLine.add("-Dmodernjava.hasrelaunched=true"); + fullCommandLine.add("-Dmodernjava.relaunchclasspath=" + thisJarFile + File.pathSeparator + ManagementFactory.getRuntimeMXBean().getClassPath()); + fullCommandLine.add("--illegal-access=permit"); + for (String open : moduleOpens) { + fullCommandLine.add("--add-opens"); + fullCommandLine.add(open); + } + fullCommandLine.add("-agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address=*:5005"); + fullCommandLine.add("-javaagent:" + thisJarFile); + fullCommandLine.add("--add-modules=ALL-MODULE-PATH,ALL-SYSTEM,ALL-DEFAULT,java.sql"); + fullCommandLine.add("-Xbootclasspath/a:" + thisJarFile); + fullCommandLine.add("moe.nea.modernjava.target.RelaunchEntryPoint"); + fullCommandLine.addAll(originalArgs); + + System.out.println("Full relaunch commandline: " + fullCommandLine); + + + processBuilder.command(fullCommandLine); + int exitCode; + try { + try { + Process process = processBuilder.start(); + exitCode = process.waitFor(); + } finally { + try { + new FileOutputStream(FileDescriptor.out).flush(); + new FileOutputStream(FileDescriptor.err).flush(); + } catch (IOException ignored) { + } + } + } catch (IOException | InterruptedException e) { + throw new RuntimeException("Failed to relaunch with old java version", e); + } + + + System.out.println("Exiting outer relaunch layer"); + IAMFML.shutdown(exitCode); + } + +} |