gradle: gamepackUpdate (#1690)

deobfuscator/build.gradle

@@ -1,4 +1,8 @@
 import org.apache.tools.ant.filters.ReplaceTokens
+import org.jetbrains.java.decompiler.main.decompiler.ConsoleDecompiler
+import java.nio.file.Files
+import java.nio.file.Paths
+import java.util.zip.ZipFile
 
 plugins {
     id "com.github.hauner.jarTest" version "1.0.1"
@@ -6,6 +10,30 @@ plugins {
 
 description = 'Deobfuscator'
 
+def deobfuscatedJar = "${rootPath}/runescape-client/build/libs/rs-client-${project.version}.jar"
+
+def unzipFile(String file, String dest)
+{
+    def zipFile = new ZipFile(file)
+
+    zipFile.entries().each { it ->
+        def path = Paths.get(dest + File.separator + it.name)
+        if (it.directory)
+        {
+            Files.createDirectories(path)
+        }
+        else
+        {
+            def parentDir = path.getParent()
+            if (!Files.exists(parentDir))
+            {
+                Files.createDirectories(parentDir)
+            }
+            Files.copy(zipFile.getInputStream(it), path)
+        }
+    }
+}
+
 configurations {
     deobjars
 }
@@ -48,3 +76,42 @@ processTestResources {
         ])
     }
 }
+
+task gamepackUpdate {
+    dependsOn ":deobfuscator:build"
+    dependsOn ":rs-client:build"
+
+    doLast {
+        def path = sourceSets.main.runtimeClasspath
+        def loader = new URLClassLoader(path.collect { f -> f.toURI().toURL() } as URL[])
+        def downloader = loader.loadClass('net.runelite.gamepack.Downloader')
+        def clientVersion = loader.loadClass('net.runelite.deob.clientver.ClientVersionMain')
+        def deob = loader.loadClass('net.runelite.deob.Deob')
+        def mappings = loader.loadClass('net.runelite.deob.updater.UpdateMappings')
+
+        String gamepack = downloader.gamepack()
+        int version = clientVersion.version(gamepack)
+
+        String gamepackVersion = gamepack.replace("gamepack.jar", "gamepack-" + version + ".jar")
+        String gamepackDeob = gamepack.replace("gamepack.jar", "gamepack-" + version + "-deob.jar")
+        String gamepackMappings = gamepack.replace("gamepack.jar", "gamepack-" + version + "-updated-mappings.jar")
+        String gamepackMappingsDecomp = gamepackMappings.replace(".jar", "-decomp")
+        String gamepackMappingsFern = gamepackMappingsDecomp + File.separator + gamepackMappings.split("/gamepack/")[1]
+
+        if (version == -1 || version == rsversion)
+        {
+            return
+        }
+
+        deob.main(gamepackVersion, gamepackDeob)
+        mappings.main(deobfuscatedJar, gamepackDeob, gamepackMappings)
+
+        new File(gamepackMappingsDecomp).mkdirs()
+        ConsoleDecompiler.main(gamepackMappings, gamepackMappingsDecomp)
+
+        unzipFile(gamepackMappingsFern, gamepackMappingsDecomp)
+        new File(gamepackMappingsFern).delete()
+
+        loader.close()
+    }
+}