build.gradle.kts

@@ -7,7 +7,7 @@ plugins {
 }
 
 group = "dev.frogmc"
-version = "0.0.1-alpha.12"
+version = "0.0.1-alpha.13"
 
 repositories {
     maven {
@@ -18,17 +18,20 @@ repositories {
         name = "FrogMC Maven Snapshots"
         url = uri("https://maven.frogmc.dev/snapshots")
     }
+    mavenLocal()
 
     mavenCentral()
 }
 
 dependencies {
-    implementation("dev.frogmc:thyroxine:0.0.1-alpha.5")
+    implementation("dev.frogmc:thyroxine:0.0.1-alpha.6")
     implementation("org.ow2.asm:asm:9.7")
+    implementation("org.ow2.asm:asm-commons:9.7")
+    implementation("org.ow2.asm:asm-tree:9.7")
     implementation("com.google.code.gson:gson:2.10.1")
     implementation("org.vineflower:vineflower:1.10.1")
     testImplementation(kotlin("test"))
-    implementation("com.electronwill.night-config:toml:3.7.3")
+    implementation("com.electronwill.night-config:toml:3.8.0")
     implementation("com.google.jimfs:jimfs:1.3.0")
 }
 

src/main/kotlin/dev/frogmc/phytotelma/Constants.kt

@@ -12,4 +12,6 @@ object Constants {
     const val GEN_RUN_CONFIGS_TASK = "genRunConfigs"
     const val RUN_CLIENT_TASK = "runClient"
     const val RUNT_SERVER_TASK = "runServer"
+    const val CLEAR_LOCAL_CACHE_TASK = "clearLocalCache"
+    const val CLEAR_GLOBAL_CACHE_TASK = "clearGlobalCache"
 }

src/main/kotlin/dev/frogmc/phytotelma/ModConfigurations.kt

@@ -0,0 +1,70 @@
+package dev.frogmc.phytotelma
+
+import org.gradle.api.plugins.JavaPlugin
+
+object ModConfigurations {
+    val configurations = listOf(
+        ModConfiguration(
+            JavaPlugin.IMPLEMENTATION_CONFIGURATION_NAME, listOf(
+                JavaPlugin.RUNTIME_CLASSPATH_CONFIGURATION_NAME,
+                JavaPlugin.COMPILE_CLASSPATH_CONFIGURATION_NAME,
+                JavaPlugin.TEST_RUNTIME_CLASSPATH_CONFIGURATION_NAME,
+                JavaPlugin.TEST_COMPILE_CLASSPATH_CONFIGURATION_NAME
+            ), DependencyType.RUNTIME
+        ),
+        ModConfiguration(
+            JavaPlugin.TEST_IMPLEMENTATION_CONFIGURATION_NAME, listOf(
+                JavaPlugin.TEST_RUNTIME_CLASSPATH_CONFIGURATION_NAME,
+                JavaPlugin.TEST_COMPILE_CLASSPATH_CONFIGURATION_NAME
+            ), DependencyType.RUNTIME
+        ),
+        ModConfiguration(
+            JavaPlugin.API_CONFIGURATION_NAME, listOf(
+                JavaPlugin.RUNTIME_CLASSPATH_CONFIGURATION_NAME,
+                JavaPlugin.COMPILE_CLASSPATH_CONFIGURATION_NAME,
+                JavaPlugin.TEST_RUNTIME_CLASSPATH_CONFIGURATION_NAME,
+                JavaPlugin.TEST_COMPILE_CLASSPATH_CONFIGURATION_NAME
+            ), DependencyType.COMPILE
+        ),
+        ModConfiguration(
+            JavaPlugin.COMPILE_ONLY_API_CONFIGURATION_NAME, listOf(
+                JavaPlugin.COMPILE_CLASSPATH_CONFIGURATION_NAME,
+                JavaPlugin.TEST_COMPILE_CLASSPATH_CONFIGURATION_NAME
+            ), DependencyType.COMPILE
+        ),
+        ModConfiguration(
+            JavaPlugin.COMPILE_ONLY_CONFIGURATION_NAME, listOf(
+                JavaPlugin.COMPILE_CLASSPATH_CONFIGURATION_NAME,
+                JavaPlugin.TEST_COMPILE_CLASSPATH_CONFIGURATION_NAME
+            )
+        ),
+        ModConfiguration(
+            JavaPlugin.TEST_COMPILE_ONLY_CONFIGURATION_NAME, listOf(
+                JavaPlugin.TEST_COMPILE_CLASSPATH_CONFIGURATION_NAME
+            )
+        ),
+        ModConfiguration(
+            JavaPlugin.RUNTIME_ONLY_CONFIGURATION_NAME, listOf(
+                JavaPlugin.RUNTIME_CLASSPATH_CONFIGURATION_NAME,
+                JavaPlugin.TEST_RUNTIME_CLASSPATH_CONFIGURATION_NAME,
+            )
+        ),
+        ModConfiguration(
+            JavaPlugin.TEST_RUNTIME_ONLY_CONFIGURATION_NAME, listOf(
+                JavaPlugin.TEST_RUNTIME_CLASSPATH_CONFIGURATION_NAME,
+            )
+        )
+    )
+}
+
+data class ModConfiguration(
+    val name: String,
+    val classpathNames: List<String>,
+    val dependencyType: DependencyType = DependencyType.NONE,
+)
+
+enum class DependencyType {
+    NONE,
+    RUNTIME,
+    COMPILE
+}

src/main/kotlin/dev/frogmc/phytotelma/PhytotelmaPlugin.kt

@@ -1,29 +1,14 @@
 package dev.frogmc.phytotelma
 
-import dev.frogmc.phytotelma.accesswidener.AccessWidener
-import dev.frogmc.phytotelma.build.PhytotelmaBuildTask
-import dev.frogmc.phytotelma.common.Env
 import dev.frogmc.phytotelma.ext.PhytotelmaGradleExtension
 import dev.frogmc.phytotelma.ext.PhytotelmaGradleExtensionImpl
-import dev.frogmc.phytotelma.run.AssetDownloader
-import dev.frogmc.phytotelma.run.RunConfigGenerator
-import dev.frogmc.phytotelma.run.task.RunGameTask
-import dev.frogmc.phytotelma.vineflower.ParchmentJavadocProvider
-import dev.frogmc.thyroxine.provider.ParchmentProvider
-import net.fabricmc.fernflower.api.IFabricJavadocProvider
 import org.gradle.api.Plugin
 import org.gradle.api.Project
 import org.gradle.api.plugins.JavaPlugin
-import org.jetbrains.java.decompiler.main.Fernflower
-import org.jetbrains.java.decompiler.main.decompiler.PrintStreamLogger
-import org.jetbrains.java.decompiler.main.decompiler.SingleFileSaver
-import org.jetbrains.java.decompiler.main.extern.IFernflowerPreferences
-import java.io.PrintStream
+import org.gradle.configurationcache.extensions.capitalized
 import java.net.URI
 import java.nio.file.Path
 import kotlin.io.path.createDirectories
-import kotlin.io.path.deleteExisting
-import kotlin.io.path.exists
 
 
 class PhytotelmaPlugin : Plugin<Project> {
@@ -43,6 +28,10 @@ class PhytotelmaPlugin : Plugin<Project> {
         }
 
         project.repositories.apply {
+            maven {
+                it.name = "Remapped Mod Dependencies"
+                it.url = project.layout.buildDirectory.asFile.get().resolve("remappedMods").toURI()
+            }
             maven {
                 it.name = "Minecraft/Local"
                 it.url = localCacheDir.toUri()
@@ -68,70 +57,20 @@ class PhytotelmaPlugin : Plugin<Project> {
             PhytotelmaGradleExtensionImpl::class.java
         )
 
-        project.extensions.findByType(PhytotelmaGradleExtension::class.java) ?: return
+        ModConfigurations.configurations.forEach { conf ->
+            project.configurations.create("mod" + conf.name.capitalized()) { c ->
+                c.isCanBeResolved = true
+                c.isCanBeConsumed = false
 
-        project.tasks.register("genSources") {task ->
-            task.group = Constants.TASK_GROUP
-            task.actions.add {
-                val projectData = ProjectStorage.get(it.project)
-                val fileName = projectData.remappedGameJarPath!!.fileName.toString()
-                val output =
-                    projectData.remappedGameJarPath!!.resolveSibling(
-                        fileName.substring(
-                            0,
-                            fileName.lastIndexOf("-")
-                        ) + "-sources.jar"
-                    )
-                if (output.exists()) {
-                    println("Output $output already exists, deleting!")
-                    output.deleteExisting()
+                when (conf.dependencyType) {
+                    DependencyType.RUNTIME -> project.configurations.getByName(JavaPlugin.RUNTIME_ELEMENTS_CONFIGURATION_NAME)
+                        .extendsFrom(c)
+
+                    DependencyType.COMPILE -> project.configurations.getByName(JavaPlugin.API_ELEMENTS_CONFIGURATION_NAME)
+                        .extendsFrom(c)
+
+                    DependencyType.NONE -> {}
                 }
-                val options = mutableMapOf<String, Any>()
-                println("Preparing Parchment...")
-                val parchment = ParchmentProvider.getParchment(
-                    projectData.minecraftVersion!!,
-                    projectData.parchmentVersion!!,
-                    globalCacheDir.resolve("org/parchmentmc/parchment/${projectData.minecraftVersion}/${projectData.parchmentVersion}/")
-                )
-                options[IFabricJavadocProvider.PROPERTY_NAME] = ParchmentJavadocProvider(parchment)
-
-                println("Decompiling...")
-                val logger = PrintStreamLogger(PrintStream(System.out))
-                options.putAll(
-                    mapOf(
-                        IFernflowerPreferences.DECOMPILE_GENERIC_SIGNATURES to "1",
-                        IFernflowerPreferences.BYTECODE_SOURCE_MAPPING to "1",
-                        IFernflowerPreferences.REMOVE_SYNTHETIC to "1",
-                        IFernflowerPreferences.LOG_LEVEL to "error",
-                        IFernflowerPreferences.THREADS to Runtime.getRuntime().availableProcessors().toString(),
-                        IFernflowerPreferences.INDENT_STRING to "\t"
-                    )
-                )
-
-                val decomp = Fernflower(
-                    SingleFileSaver(output.toFile()),
-                    options, logger
-                )
-                decomp.addSource(projectData.remappedGameJarPath!!.toFile())
-
-                decomp.decompileContext()
-            }
-        }
-
-        project.tasks.register(Constants.GEN_RUN_CONFIGS_TASK) {task ->
-            task.group = Constants.TASK_GROUP
-            task.doFirst {
-                RunConfigGenerator.generate(project)
-            }
-        }
-
-        project.tasks.register(Constants.RUN_CLIENT_TASK, RunGameTask::class.java, Env.CLIENT)
-        project.tasks.register(Constants.RUNT_SERVER_TASK, RunGameTask::class.java, Env.SERVER)
-
-        project.tasks.register(Constants.DOWNLOAD_ASSETS_TASK) { task ->
-            task.group = Constants.TASK_GROUP
-            task.doFirst {
-                AssetDownloader.download(it.project)
             }
         }
 
@@ -149,16 +88,6 @@ class PhytotelmaPlugin : Plugin<Project> {
             it.isCanBeConsumed = false
             it.isTransitive = false
         }
-
-        val buildTask = project.tasks.register(Constants.BUILD_TASK, PhytotelmaBuildTask::class.java)
-        project.tasks.getByName("build").dependsOn(buildTask)
-
-        project.tasks.register(Constants.UPDATE_AW_TASK) { task ->
-            task.group = Constants.TASK_GROUP
-            task.actions.addFirst {
-                AccessWidener.apply(project, ProjectStorage.get(it.project).remappedGameJarPath!!)
-            }
-        }
     }
 
     companion object {

src/main/kotlin/dev/frogmc/phytotelma/ProjectStorage.kt

@@ -1,5 +1,6 @@
 package dev.frogmc.phytotelma
 
+import dev.frogmc.thyroxine.api.data.MappingBundle
 import org.gradle.api.Project
 import java.nio.file.Path
 
@@ -8,15 +9,19 @@ object ProjectStorage {
     private val data = mutableMapOf<Project, ProjectData>()
 
     fun get(project: Project): ProjectData {
-        if (!data.containsKey(project)){
-            data[project] = ProjectData(null, null, null, null)
+        if (!data.containsKey(project)) {
+            data[project] = ProjectData(null, null, null, null, null, null)
         }
         return data[project]!!
     }
 
 }
 
-class ProjectData(var localCacheDir: Path?,
+class ProjectData(
+    var localCacheDir: Path?,
     var minecraftVersion: String?,
     var remappedGameJarPath: Path?,
-                  var parchmentVersion: String?)
+    var mappings: MappingBundle?,
+    var mappingsName: String?,
+    var targetNamespace: String?
+)

src/main/kotlin/dev/frogmc/phytotelma/VersionChecker.kt

@@ -1,3 +1,5 @@
+@file:Suppress("unused")
+
 package dev.frogmc.phytotelma
 
 import com.google.gson.Gson
@@ -5,9 +7,11 @@ import com.google.gson.GsonBuilder
 import dev.frogmc.phytotelma.common.CachingHttpClient
 import org.gradle.api.Project
 import java.net.URI
-import java.nio.file.Files
 import java.nio.file.Path
-import kotlin.io.path.*
+import kotlin.io.path.createDirectories
+import kotlin.io.path.exists
+import kotlin.io.path.writeBytes
+import kotlin.io.path.writeText
 
 object VersionChecker {
     private var validVersions = mutableListOf<VersionUrl>()
@@ -77,17 +81,6 @@ object VersionChecker {
         return fetchVersionData(version).downloads.client
     }
 
-    fun downloadAssetIndex(version: String, path: Path): String {
-        val index = fetchVersionData(version).assetIndex
-        val dest = path.resolve(index.id + ".json")
-        if (dest.notExists()) {
-            CachingHttpClient.getUncached(URI.create(index.url)).use {
-                Files.copy(it, dest)
-            }
-        }
-        return index.id
-    }
-
     private fun rawDownload(url: String): ByteArray {
         return CachingHttpClient.getUncached(URI.create(url)).readAllBytes()
     }

src/main/kotlin/dev/frogmc/phytotelma/accesswidener/AccessWidener.kt

@@ -9,6 +9,7 @@ import org.gradle.api.artifacts.ProjectDependency
 import org.gradle.api.plugins.JavaPlugin
 import org.gradle.api.plugins.JavaPluginExtension
 import org.objectweb.asm.*
+import org.objectweb.asm.tree.ClassNode
 import java.nio.charset.StandardCharsets
 import java.nio.file.FileSystems
 import java.nio.file.Path
@@ -45,18 +46,20 @@ object AccessWidener {
     private fun findDependencyAWs(project: Project): Stream<String> {
         val conf = project.configurations.getByName(JavaPlugin.RUNTIME_CLASSPATH_CONFIGURATION_NAME)
         val projectDeps = conf.dependencies.filterIsInstance<ProjectDependency>()
-            .mapNotNull { getAWFile(it.dependencyProject) }.stream().flatMap { readTransitiveAW(it) }
-        val dependencies = conf.resolvedConfiguration.files.map  { it.toPath() }.filter { it.exists() && it.isRegularFile() }.stream().flatMap {
-            FileSystems.newFileSystem(it).use {fs ->
+            .mapNotNull { getAWFile(it.dependencyProject) }.flatMap { readTransitiveAW(it) }
+        val dependencies =
+            conf.resolvedConfiguration.files.map { it.toPath() }.filter { it.exists() && it.isRegularFile() }.stream()
+                .flatMap {
+                    FileSystems.newFileSystem(it).use { fs ->
                         val metadata = fs.getPath(Constants.MOD_METADATA_FILE)
                         PARSER.parse(metadata, FileNotFoundAction.READ_NOTHING)
                             .get<String>("frog.extensions.accesswidener")?.let { name ->
-                        return@flatMap readTransitiveAW(metadata.resolveSibling(name))
+                                return@flatMap readTransitiveAW(metadata.resolveSibling(name)).stream()
                             }
                     }
                     return@flatMap null
                 }.filter { it != null }
-        return Stream.concat(projectDeps, dependencies)
+        return Stream.concat(projectDeps.stream(), dependencies)
     }
 
     fun needsUpdate(project: Project): Boolean {
@@ -70,24 +73,75 @@ object AccessWidener {
         return false
     }
 
-    private fun readAW(project: Project): Stream<String> {
+    fun checkAW(path: Path, gamePath: Path) {
+        val reader = path.bufferedReader(StandardCharsets.UTF_8)
+        if (!HEADER.test(reader.readLine() ?: "")) {
+            error("AccessWidener validation failed (invalid header)")
+        }
+        FileSystems.newFileSystem(gamePath).use { fs ->
+            reader.lines().toList().forEachIndexed { index, line ->
+                val checkString = line.substring(0, line.indexOf("#"))
+
+                if (checkString.isNotEmpty()) {
+                    val parts = checkString.split(SEPARATOR)
+                    if (parts.size < 3) {
+                        error("AccessWidener validation failed in line ${index + 2}: $line")
+                    }
+                    if (parts[1] == "class") {
+                        val target = parts[2]
+                        if (fs.getPath(target).notExists()) {
+                            error("AccessWidener validation failed in line ${index + 2}: $line (Invalid target)")
+                        }
+                    }
+                    if (parts.size < 5) {
+                        error("AccessWidener validation failed in line ${index + 2}: $line (Declaration missing)")
+                    }
+                    val owner = parts[2]
+                    val name = parts[3]
+                    val desc = parts[4]
+                    when (parts[1]) {
+                        "method" -> {
+                            val classReader = ClassReader(fs.getPath(owner).readBytes())
+                            val node = ClassNode()
+                            classReader.accept(node, 0)
+                            if (node.methods.none { it.name.equals(name) && it.desc.equals(desc) }) {
+                                error("AccessWidener validation failed in line ${index + 2}: $line (Could not find target method)")
+                            }
+                        }
+
+                        "field" -> {
+                            val classReader = ClassReader(fs.getPath(owner).readBytes())
+                            val node = ClassNode()
+                            classReader.accept(node, 0)
+                            if (node.fields.none { it.name.equals(name) && it.desc.equals(desc) }) {
+                                error("AccessWidener validation failed in line ${index + 2}: $line (Could not find target field)")
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    private fun readAW(project: Project): List<String> {
         val awFile = getAWFile(project)
         println("Found accesswidener in project: $awFile")
         return awFile?.bufferedReader(StandardCharsets.UTF_8)
             .takeIf { HEADER.test(it?.readLine() ?: "") }?.lines()
-            ?.map { it.replace("transitive-", "") }
-            ?: Stream.empty()
+            ?.map { it.replace("transitive-", "") }?.toList()
+            ?: emptyList()
 
     }
 
-    private fun readTransitiveAW(path: Path): Stream<String> {
-        return path.bufferedReader(StandardCharsets.UTF_8).takeIf { HEADER.test(it.readLine() ?: "") }?.lines()?.filter { it.startsWith("transitive-") }?: Stream.empty()
+    private fun readTransitiveAW(path: Path): List<String> {
+        return path.bufferedReader(StandardCharsets.UTF_8).takeIf { HEADER.test(it.readLine() ?: "") }?.lines()
+            ?.filter { it.startsWith("transitive-") }?.toList() ?: emptyList()
     }
 
     private fun readAllAWs(project: Project): Stream<Entry> {
         return Stream.concat(
             findDependencyAWs(project),
-            readAW(project)
+            readAW(project).stream()
         )
             .filter { it.isNotBlank() }
             .map { if (it.contains("#")) it.split("#")[0] else it }.filter { !HEADER.test(it) }

src/main/kotlin/dev/frogmc/phytotelma/ext/MinecraftConfiguration.kt

@@ -0,0 +1,260 @@
+package dev.frogmc.phytotelma.ext
+
+import dev.frogmc.phytotelma.PhytotelmaPlugin
+import dev.frogmc.phytotelma.mappings.filterClasses
+import dev.frogmc.phytotelma.mappings.renameDstNamespace
+import dev.frogmc.phytotelma.mappings.renameNamespaces
+import dev.frogmc.thyroxine.api.data.MappingBundle
+import dev.frogmc.thyroxine.parser.tiny.TinyV2Parser
+import dev.frogmc.thyroxine.provider.MojmapProvider
+import dev.frogmc.thyroxine.provider.ParchmentProvider
+import org.gradle.api.Action
+import org.gradle.api.Project
+import org.gradle.api.model.ObjectFactory
+import org.gradle.api.provider.Provider
+import java.nio.charset.StandardCharsets
+import java.nio.file.FileSystems
+import java.nio.file.Path
+import javax.inject.Inject
+import kotlin.io.path.readText
+
+@Suppress("MemberVisibilityCanBePrivate", "unused")
+abstract class MinecraftConfiguration @Inject constructor(
+    private val project: Project,
+    private val objects: ObjectFactory
+) {
+
+    var version: String? = null
+    var mappings: Provider<MappingBundle> = mojmapParchment()
+    internal lateinit var mappingsName: String
+    internal lateinit var targetNamespace: String
+
+    fun mojmapParchment(): Provider<MappingBundle> {
+        return mojmapParchment {}
+    }
+
+    fun mojmapParchment(action: Action<ParchmentConfiguration>): Provider<MappingBundle> {
+        return project.provider {
+            val conf = objects.newInstance(ParchmentConfiguration::class.java)
+            conf.gameVersion = version
+            action.execute(conf)
+            val cacheDir = PhytotelmaPlugin.globalCacheDir
+
+            if (conf.version == null) {
+                conf.version = ParchmentProvider.findForMinecraftVersion(conf.gameVersion)
+            }
+            mappingsName = "mojmap($version)+parchment(${conf.gameVersion}, ${conf.version})"
+            targetNamespace = "mojmap"
+
+            return@provider MappingBundle.merge(
+                MojmapProvider.get(
+                    version,
+                    cacheDir.resolve("net/minecraft/client/$version/client-$version.txt")
+                ).orElseThrow().reverse(),
+                ParchmentProvider.getParchment(
+                    version,
+                    cacheDir.resolve("org/parchmentmc/parchment/${conf.gameVersion}/${conf.version}")
+                )
+            ).renameDstNamespace(targetNamespace)
+        }
+    }
+
+    fun parchment(action: Action<ParchmentConfiguration>): Provider<MappingBundle> {
+        return project.provider {
+            val conf = objects.newInstance(ParchmentConfiguration::class.java)
+            conf.gameVersion = version
+            action.execute(conf)
+            val cacheDir = PhytotelmaPlugin.globalCacheDir
+
+            if (conf.version == null) {
+                conf.version = ParchmentProvider.findForMinecraftVersion(conf.gameVersion)
+            }
+
+            mappingsName = "parchment(${conf.gameVersion}, ${conf.version})"
+            targetNamespace = "parchment"
+
+            return@provider ParchmentProvider.getParchment(
+                version,
+                cacheDir.resolve("org/parchmentmc/parchment/${conf.gameVersion}/${conf.version}")
+            ).renameNamespaces("mojmap", "parchment")
+        }
+    }
+
+    fun mojmap(): Provider<MappingBundle> {
+        return project.provider {
+            val cacheDir = PhytotelmaPlugin.globalCacheDir
+            mappingsName = "mojmap($version)"
+            targetNamespace = "mojmap"
+            return@provider MojmapProvider.get(
+                version,
+                cacheDir.resolve("net/minecraft/client/$version/client-$version.txt")
+            ).orElseThrow().reverse().renameDstNamespace(targetNamespace)
+        }
+    }
+
+    fun quiltMappings(action: Action<VersionConfiguration>): Provider<MappingBundle> {
+        return project.provider {
+            val conf = objects.newInstance(VersionConfiguration::class.java)
+            action.execute(conf)
+            if (conf.version == null) {
+                error("No version provided for quilt mappings!")
+            }
+            mappingsName = "quilt-mappings(${conf.version})"
+            targetNamespace = "quilt-mappings"
+            // Use qm via intermediary because hashed publications are broken
+            return@provider twoStepMappings(
+                "net.fabricmc:intermediary:$version:v2",
+                "org.quiltmc:quilt-mappings:${conf.version}:intermediary-v2"
+            ).filterClasses { !it.startsWith("net/minecraft/unmapped") }
+                .flatten(true).renameDstNamespace(targetNamespace)
+        }
+    }
+
+    fun yarn(action: Action<VersionConfiguration>): Provider<MappingBundle> {
+        return project.provider {
+            val conf = objects.newInstance(VersionConfiguration::class.java)
+            action.execute(conf)
+            if (conf.version == null) {
+                error("No version provided for yarn!")
+            }
+            mappingsName = "yarn(${conf.version})"
+            targetNamespace = "yarn"
+            // Use qm via intermediary because hashed publications are broken
+            return@provider twoStepMappings(
+                "net.fabricmc:intermediary:$version:v2",
+                "net.fabricmc:yarn:${conf.version}:v2"
+            ).filterClasses { !it.startsWith("net/minecraft/class_") }
+                .flatten(true).renameDstNamespace(targetNamespace)
+        }
+    }
+
+    fun twoStepMappings(action: Action<TwoStepMappingsConfiguration>): Provider<MappingBundle> {
+        return project.provider {
+            val conf = objects.newInstance(TwoStepMappingsConfiguration::class.java)
+            action.execute(conf)
+            if (conf.first == null) {
+                error("No version provided for first mapping step!")
+            }
+            if (conf.second == null) {
+                error("No version provided for second mapping step!")
+            }
+            mappingsName = "custom/two-step(${conf.first!!}, ${conf.second!!})"
+            val bundle = twoStepMappings(conf.first!!, conf.second!!)
+            targetNamespace = bundle.flattenData().dstNamespace
+            return@provider bundle
+        }
+    }
+
+    fun tinyMappings(action: Action<NameConfiguration>): Provider<MappingBundle> {
+        return project.provider {
+            val conf = objects.newInstance(NameConfiguration::class.java)
+            action.execute(conf)
+            if (conf.name == null) {
+                error("No maven coordinate provided for tiny mappings!")
+            }
+            mappingsName = "custom/tiny(${conf.name})"
+            val bundle = tinyMappings(conf.name!!)
+            targetNamespace = bundle.flattenData().dstNamespace
+            return@provider bundle
+        }
+    }
+
+    fun mappings(action: Action<MappingBundle>): Provider<MappingBundle> {
+        return project.provider {
+            val bundle = MappingBundle()
+            action.execute(bundle)
+            mappingsName = "custom(${bundle.srcNamespaces()}, ${bundle.dstNamespaces()})"
+            targetNamespace = bundle.flattenData().dstNamespace
+            return@provider bundle
+        }
+    }
+
+    fun layer(action: Action<LayerConfiguration>): Provider<MappingBundle> {
+        return project.provider {
+            val conf = objects.newInstance(LayerConfiguration::class.java)
+            action.execute(conf)
+
+            var back = MappingBundle()
+            var name = "layer["
+
+            val layers = conf.layers.mapIndexed { index, provider ->
+                val bundle = provider.get().flatten(true)
+                if (index == 0) {
+                    name += mappingsName
+                    back.insert(bundle)
+                    return@mapIndexed bundle
+                }
+                name += ", $mappingsName"
+
+                back = back.flatten(false)
+                val prevDst = back.data[0].dstNamespace
+                val dst = bundle.data[0].dstNamespace
+                val remapped = MappingBundle.merge(bundle.reverse(), back)
+                    .flatten(prevDst, dst)
+                    .insert(back.docsForNamespace(dst))
+
+                back.insert(remapped)
+                return@mapIndexed remapped
+            }
+            mappingsName = "$name]"
+            val result = MappingBundle.merge(*layers.toTypedArray())
+                .flatten("official", layers.last().dstNamespaces()[0])
+            targetNamespace = result.data[0].dstNamespace
+            return@provider result
+        }
+    }
+
+    private fun twoStepMappings(intermediary: String, mappings: String): MappingBundle {
+        return MappingBundle.merge(tinyMappings(intermediary), tinyMappings(mappings))
+    }
+
+    private fun tinyMappings(name: String): MappingBundle {
+        mavenMappings(name).let { path ->
+            FileSystems.newFileSystem(path).use {
+                return TinyV2Parser.parse(it.getPath("mappings/mappings.tiny").readText(StandardCharsets.UTF_8))
+            }
+        }
+    }
+
+    @Suppress("UnstableApiUsage")
+    private fun mavenMappings(name: String): Path {
+
+        val configuration = project.configurations.create("mappings") {
+            it.isCanBeResolved = true
+            it.isCanBeDeclared = true
+        }
+        configuration.dependencies.add(project.dependencies.create(name))
+        val path = configuration.resolve().first().toPath()
+        project.configurations.remove(configuration)
+        return path
+    }
+
+    abstract class TwoStepMappingsConfiguration {
+        var first: String? = null
+        var second: String? = null
+    }
+
+    abstract class ParchmentConfiguration {
+        var gameVersion: String? = null
+        var version: String? = null
+    }
+
+    abstract class LayerConfiguration {
+        internal val layers = mutableListOf<Provider<MappingBundle>>()
+        fun add(mappings: Provider<MappingBundle>): LayerConfiguration {
+            layers.add(mappings)
+            return this
+        }
+    }
+}
+
+abstract class NameConfiguration {
+    var name: String? = null
+}
+
+abstract class VersionConfiguration {
+    var version: String? = null
+}
+
+
+

src/main/kotlin/dev/frogmc/phytotelma/ext/PhytotelmaGradleExtension.kt

@@ -1,25 +1,13 @@
 package dev.frogmc.phytotelma.ext
 
-import org.gradle.api.provider.Provider
+import org.gradle.api.Action
 
 @Suppress("unused")
 interface PhytotelmaGradleExtension {
 
-    fun minecraft(version: String, parchmentGameVersion: String? = null, parchmentVersion: String? = null)
+    fun minecraft(action: Action<MinecraftConfiguration>)
 
-    fun minecraft(version: Provider<String>, parchmentGameVersion: Provider<String>? = null, parchmentVersion: Provider<String>? = null) {
-        minecraft(version.get(), parchmentGameVersion?.get(), parchmentVersion?.get())
-    }
+    fun loader(action: Action<VersionConfiguration>)
 
-    fun loader(version: String)
-
-    fun loader(version: Provider<String>) {
-        loader(version.get())
-    }
-
-    fun froglib(version: String)
-
-    fun froglib(version: Provider<String>) {
-        froglib(version.get())
-    }
+    fun froglib(action: Action<VersionConfiguration>)
 }

src/main/kotlin/dev/frogmc/phytotelma/ext/PhytotelmaGradleExtensionImpl.kt

@@ -1,105 +1,328 @@
 package dev.frogmc.phytotelma.ext
 
-import dev.frogmc.phytotelma.Constants
-import dev.frogmc.phytotelma.PhytotelmaPlugin
-import dev.frogmc.phytotelma.ProjectStorage
-import dev.frogmc.phytotelma.VersionChecker
+import com.electronwill.nightconfig.core.file.FileNotFoundAction
+import com.electronwill.nightconfig.toml.TomlParser
+import dev.frogmc.phytotelma.*
 import dev.frogmc.phytotelma.accesswidener.AccessWidener
+import dev.frogmc.phytotelma.build.PhytotelmaBuildTask
+import dev.frogmc.phytotelma.common.Env
+import dev.frogmc.phytotelma.mappings.renameDstNamespace
+import dev.frogmc.phytotelma.run.AssetDownloader
 import dev.frogmc.phytotelma.run.RunConfigGenerator
+import dev.frogmc.phytotelma.run.task.RunGameTask
+import dev.frogmc.phytotelma.vineflower.FrogJavadocProvider
 import dev.frogmc.thyroxine.Thyroxine
-import dev.frogmc.thyroxine.parser.ProguardParser
+import dev.frogmc.thyroxine.api.Mapper
+import dev.frogmc.thyroxine.api.data.MappingBundle
 import dev.frogmc.thyroxine.provider.MojmapProvider
-import dev.frogmc.thyroxine.provider.ParchmentProvider
+import net.fabricmc.fernflower.api.IFabricJavadocProvider
+import org.gradle.api.Action
 import org.gradle.api.Project
+import org.gradle.api.model.ObjectFactory
+import org.gradle.api.plugins.JavaBasePlugin
+import org.gradle.api.plugins.JavaPlugin
+import org.gradle.api.tasks.Delete
+import org.gradle.configurationcache.extensions.capitalized
+import org.jetbrains.java.decompiler.main.Fernflower
+import org.jetbrains.java.decompiler.main.decompiler.PrintStreamLogger
+import org.jetbrains.java.decompiler.main.decompiler.SingleFileSaver
+import org.jetbrains.java.decompiler.main.extern.IFernflowerPreferences
+import java.io.OutputStream
+import java.io.PrintStream
+import java.nio.file.FileSystems
+import java.nio.file.Files
+import java.nio.file.Path
+import java.nio.file.StandardCopyOption
 import javax.inject.Inject
-import kotlin.io.path.createParentDirectories
-import kotlin.io.path.notExists
+import kotlin.io.path.*
 
-abstract class PhytotelmaGradleExtensionImpl : PhytotelmaGradleExtension {
+abstract class PhytotelmaGradleExtensionImpl @Inject constructor(
+    private val project: Project,
+    private val objects: ObjectFactory
+) : PhytotelmaGradleExtension {
 
-    @Inject
-    abstract fun getProject(): Project
+    private fun setupTasks() {
+        project.tasks.register("genSources") { task ->
+            task.group = Constants.TASK_GROUP
+            task.actions.add {
+                val projectData = ProjectStorage.get(it.project)
+                val fileName = projectData.remappedGameJarPath!!.fileName.toString()
+                val output =
+                    projectData.remappedGameJarPath!!.resolveSibling(
+                        fileName.substring(
+                            0,
+                            fileName.lastIndexOf("-")
+                        ) + "-sources.jar"
+                    )
+                if (output.exists()) {
+                    println("Output $output already exists, deleting!")
+                    output.deleteExisting()
+                }
+                val options = mutableMapOf<String, Any>()
+                println("Preparing Parchment...")
+                val javadocs = ProjectStorage.get(project).mappings!!
+                options[IFabricJavadocProvider.PROPERTY_NAME] =
+                    FrogJavadocProvider(javadocs.get(ProjectStorage.get(project).targetNamespace))
 
-    override fun minecraft(version: String, parchmentGameVersion: String?, parchmentVersion: String?) {
-        if (VersionChecker.validateVersion(version, offlineMode = getProject().gradle.startParameter.isOffline)) {
-            println("Setting up Minecraft...")
-            val parchmentGameVer = parchmentGameVersion?: version
-            val parchment =
-                parchmentVersion ?: kotlin.runCatching { ParchmentProvider.findForMinecraftVersion(parchmentGameVer) }
-                    .getOrDefault("")
-            val projectData = ProjectStorage.get(getProject())
+                println("Decompiling...")
+                val logger = PrintStreamLogger(PrintStream(System.out))
+                options.putAll(
+                    mapOf(
+                        IFernflowerPreferences.DECOMPILE_GENERIC_SIGNATURES to "1",
+                        IFernflowerPreferences.BYTECODE_SOURCE_MAPPING to "1",
+                        IFernflowerPreferences.REMOVE_SYNTHETIC to "1",
+                        IFernflowerPreferences.LOG_LEVEL to "error",
+                        IFernflowerPreferences.THREADS to Runtime.getRuntime().availableProcessors().toString(),
+                        IFernflowerPreferences.INDENT_STRING to "\t"
+                    )
+                )
+
+                val decomp = Fernflower(
+                    SingleFileSaver(output.toFile()),
+                    options, logger
+                )
+                decomp.addSource(projectData.remappedGameJarPath!!.toFile())
+
+                decomp.decompileContext()
+            }
+        }
+
+        project.tasks.register(Constants.GEN_RUN_CONFIGS_TASK) { task ->
+            task.group = Constants.TASK_GROUP
+            task.doFirst {
+                RunConfigGenerator.generate(project)
+            }
+        }
+
+        project.tasks.register(Constants.RUN_CLIENT_TASK, RunGameTask::class.java, Env.CLIENT)
+        project.tasks.register(Constants.RUNT_SERVER_TASK, RunGameTask::class.java, Env.SERVER)
+
+        project.tasks.register(Constants.DOWNLOAD_ASSETS_TASK) { task ->
+            task.group = Constants.TASK_GROUP
+            task.doFirst {
+                AssetDownloader.download(it.project, true)
+            }
+        }
+
+        val buildTask = project.tasks.register(Constants.BUILD_TASK, PhytotelmaBuildTask::class.java)
+        project.tasks.getByName(JavaBasePlugin.BUILD_TASK_NAME).dependsOn(buildTask)
+
+        project.tasks.getByName(JavaPlugin.JAR_TASK_NAME).actions.addLast { task ->
+            val storage = ProjectStorage.get(project)
+            if (storage.targetNamespace != "mojmap") {
+                val mappings = MappingBundle.merge(
+                    storage.mappings!!.reverse(), MojmapProvider.get(
+                        storage.minecraftVersion!!,
+                        PhytotelmaPlugin.globalCacheDir.resolve("net/minecraft/client/${storage.minecraftVersion}/client-${storage.minecraftVersion}.txt")
+                    ).orElseThrow().reverse().renameDstNamespace("mojmap")
+                ).forNamespaces(storage.targetNamespace, "mojmap")
+                val parser = TomlParser()
+                task.outputs.files.forEach { file ->
+                    val temp = Files.createTempFile("", file.name)
+                    Files.copy(file.toPath(), temp, StandardCopyOption.REPLACE_EXISTING)
+                    FileSystems.newFileSystem(temp).use { fs ->
+                        val metadata = fs.getPath(Constants.MOD_METADATA_FILE)
+                        parser.parse(metadata, FileNotFoundAction.READ_NOTHING)
+                            .get<String>("frog.extensions.accesswidener")?.let { name ->
+                                val aw = metadata.resolveSibling(name)
+                                AccessWidener.checkAW(aw, ProjectStorage.get(project).remappedGameJarPath!!)
+                                val mapper = Mapper(mappings) { listOf() }
+                                val buffer = buildString {
+                                    aw.forEachLine {
+                                        if (it.contains("\\t") && !it.startsWith("#")) {
+                                            val parts = it.split("[\\t #]+".toRegex()).toMutableList()
+
+                                            if (parts.size > 2) {
+
+                                                val type = parts[1]
+                                                when (type) {
+                                                    "class" -> {
+                                                        parts[2] = mapper.map(parts[2])
+                                                    }
+
+                                                    "fields" -> {
+                                                        parts[3] = mapper.mapFieldName(parts[2], parts[3], parts[4])
+                                                        parts[4] = mapper.mapDesc(parts[4])
+                                                        parts[3] = mapper.map(parts[2])
+                                                    }
+
+                                                    "methods" -> {
+                                                        parts[3] = mapper.mapMethodName(parts[2], parts[3], parts[4])
+                                                        parts[4] = mapper.mapMethodDesc(parts[4])
+                                                        parts[2] = mapper.map(parts[2])
+                                                    }
+                                                }
+                                                appendLine(parts.joinToString("\\t"))
+                                                return@forEachLine
+                                            }
+                                        }
+                                        appendLine(it)
+                                    }
+                                }
+                                aw.writeText(buffer)
+                            }
+                    }
+                    Thyroxine.remap(mappings, temp, file.toPath(), false, false)
+                    Files.deleteIfExists(temp)
+                }
+            }
+        }
+
+        project.tasks.register(Constants.UPDATE_AW_TASK) { task ->
+            task.group = Constants.TASK_GROUP
+            task.actions.addFirst {
+                AccessWidener.apply(project, ProjectStorage.get(it.project).remappedGameJarPath!!)
+            }
+        }
+
+        project.tasks.register(Constants.CLEAR_LOCAL_CACHE_TASK, Delete::class.java) { task ->
+            task.group = Constants.TASK_GROUP
+            task.delete = setOf(ProjectStorage.get(project).localCacheDir)
+        }
+
+        project.tasks.register(Constants.CLEAR_GLOBAL_CACHE_TASK, Delete::class.java) { task ->
+            task.group = Constants.TASK_GROUP
+            task.delete = setOf(PhytotelmaPlugin.globalCacheDir)
+        }
+
+        project.afterEvaluate {
+            remapModDependencies()
+        }
+    }
+
+    private fun remapModDependencies() {
+        val out = System.out
+        // Mute the output from thyroxine as there may be a lot of remapping operations here
+        System.setOut(PrintStream(OutputStream.nullOutputStream()))
+        ModConfigurations.configurations.forEach { conf ->
+            val artifacts = project.configurations.getByName("mod" + conf.name.capitalized())
+                .resolvedConfiguration.resolvedArtifacts
+            if (artifacts.isEmpty()) {
+                return
+            }
+            val target = project.configurations.create("mod" + conf.name.capitalized() + "Mapped") { c ->
+                c.isTransitive = false
+                conf.classpathNames.forEach {
+                    project.configurations.getByName(it).extendsFrom(c)
+                }
+            }
+            val storage = ProjectStorage.get(project)
+            val mappings = MappingBundle.merge(
+                storage.mappings!!.reverse(), MojmapProvider.get(
+                    storage.minecraftVersion!!,
+                    PhytotelmaPlugin.globalCacheDir.resolve("net/minecraft/client/${storage.minecraftVersion}/client-${storage.minecraftVersion}.txt")
+                ).orElseThrow().reverse().renameDstNamespace("mojmap")
+            ).forNamespaces("mojmap", storage.targetNamespace)
+            val targetPath = project.layout.buildDirectory.asFile.get().toPath().resolve("remappedMods")
+                .resolve("dev/frogmc/phytotelma/remapped_mods")
+            val remappedPaths = mutableListOf<Path>()
+            artifacts.forEach { artifact ->
+                val group = artifact.moduleVersion.id.group
+                val name = artifact.moduleVersion.id.name
+                val groupname = (group + "_" + name).replace(".", "_")
+                val version = artifact.moduleVersion.id.version
+                val classifier = artifact.classifier
+                val remappedPath = targetPath.resolve(groupname).resolve(version)
+                    .resolve(groupname + "-" + version + (classifier?.let { "-$it" } ?: "") + ".jar")
+                remappedPath.createParentDirectories()
+                remappedPaths.add(remappedPath)
+
+                val pom = remappedPath.resolveSibling(remappedPath.fileName.toString().removeSuffix(".jar") + ".pom")
+                pom.writeText(
+                    "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
+                            "<project xsi:schemaLocation=\"http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd\" xmlns=\"http://maven.apache.org/POM/4.0.0\"\n" +
+                            "\t\t xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">\n" +
+                            "\t<modelVersion>4.0.0</modelVersion>\n" +
+                            "\t<groupId>dev.frogmc.phytotelma.remapped_mods</groupId>\n" +
+                            "\t<artifactId>$groupname</artifactId>\n" +
+                            "\t<version>$version</version>\n" +
+                            "</project>"
+                )
+                remappedPaths.add(pom)
+
+                Thyroxine.remap(mappings, artifact.file.toPath(), remappedPath, false, false)
+
+                project.dependencies.add(
+                    target.name,
+                    "dev.frogmc.phytotelma.remapped_mods:$groupname:$version" + (classifier?.let { ":$it" } ?: "")
+                )
+            }
+        }
+        System.setOut(out)
+    }
+
+    override fun minecraft(action: Action<MinecraftConfiguration>) {
+        setupTasks()
+        val mcConf = objects.newInstance(MinecraftConfiguration::class.java)
+        action.execute(mcConf)
+
+        if (mcConf.version == null) {
+            error("No Minecraft version provided!")
+        }
+        val version = mcConf.version!!
+
+        if (VersionChecker.validateVersion(version, offlineMode = project.gradle.startParameter.isOffline)) {
+
+            val projectData = ProjectStorage.get(project)
             projectData.minecraftVersion = version
-            projectData.parchmentVersion = parchment
-            println("Valid version! $version")
-            val clientJar = VersionChecker.downloadClient(getProject(), version)
+
+            val mappings = mcConf.mappings.get()
+            println("Using mappings: " + mcConf.mappingsName)
+            projectData.mappings = mappings
+
+            val clientJar = VersionChecker.downloadClient(project, version)
             val remappedJar =
                 projectData.localCacheDir!!.resolve("net/minecraft/client/$version/client-$version-remapped.jar")
             remappedJar.createParentDirectories()
             projectData.remappedGameJarPath = remappedJar
-            println("Time to setup Minecraft!")
-            val applyAW = AccessWidener.needsUpdate(getProject())
-            if (remappedJar.notExists() || applyAW) {
+            val applyAW = AccessWidener.needsUpdate(project)
+            if (remappedJar.notExists() || applyAW || mcConf.mappingsName != projectData.mappingsName) {
+                projectData.mappingsName = mcConf.mappingsName
                 println("Remapping the game...")
-                val data = kotlin.runCatching {
-                    ProguardParser.read(
-                        MojmapProvider.get(
-                            version,
-                            clientJar.resolveSibling("client-$version.txt")
-                        ).orElseThrow()
-                    ).reverse()
-                }.getOrNull()
-                val paramMappings = if (parchment.isNotEmpty()) kotlin.runCatching {
-                    ParchmentProvider.getParchment(
-                        parchmentGameVer, parchment,
-                        PhytotelmaPlugin.globalCacheDir.resolve("org/parchmentmc/parchment/$parchmentGameVer/$parchment"),
-                        getProject().gradle.startParameter.isRefreshDependencies
+                projectData.targetNamespace = mcConf.targetNamespace
+                Thyroxine.remap(
+                    mappings.forNamespaces("official", mcConf.targetNamespace),
+                    clientJar, remappedJar, true, true
                 )
-                }.getOrNull() else {
-                    println("Parameter mappings will not be present as no parchment version was found. It may be possible to declare it manually.")
-                    null
             }
-                if (paramMappings == null && parchment.isNotEmpty()) {
-                    println("Parameter mappings will not be present as the version $parchmentVersion for minecraft version $parchmentGameVer could not be found")
-                }
-                if (data != null) {
-                    Thyroxine.remap(data, clientJar, remappedJar, true, paramMappings)
-                } else {
-                    error("Failed to remap the game as no mojmap version was found for game version $version. Other mapping formats may be implemented in the future.")
-                }
-            }
-            println("Adding dependencies...")
-            getProject().dependencies.add(
+
+            project.dependencies.add(
                 Constants.MINECRAFT_CONFIGURATION,
                 "net.minecrell:terminalconsoleappender:1.2.0"
             )
             VersionChecker.getDependencies(version) {
-                getProject().dependencies.add(Constants.MINECRAFT_CONFIGURATION, it)
+                project.dependencies.add(Constants.MINECRAFT_CONFIGURATION, it)
             }
             VersionChecker.savePomFile(version, remappedJar.parent)
-            getProject().dependencies.add(Constants.MINECRAFT_CONFIGURATION, "net.minecraft:client:$version:remapped")
+            project.dependencies.add(Constants.MINECRAFT_CONFIGURATION, "net.minecraft:client:$version:remapped")
 
-            println("Generating run configurations...")
-            RunConfigGenerator.generate(getProject())
+            RunConfigGenerator.generate(project)
+            AssetDownloader.download(project)
 
             if (applyAW) {
-                getProject().afterEvaluate {
+                project.afterEvaluate {
                     println("Applying AccessWideners...")
-                    AccessWidener.apply(getProject(), remappedJar)
+                    AccessWidener.apply(project, remappedJar)
+                }
+            }
         }
     }
 
-            println("Done!")
-        } else {
-            println("Invalid version! $version")
-            error("Invalid minecraft version provided: $version")
+    override fun loader(action: Action<VersionConfiguration>) {
+        val conf = objects.newInstance(VersionConfiguration::class.java)
+        action.execute(conf)
+        if (conf.version == null) {
+            error("No loader version provided!")
         }
+        project.dependencies.add("implementation", "dev.frogmc:frogloader:${conf.version!!}")
     }
 
-    override fun loader(version: String) {
-        getProject().dependencies.add("implementation", "dev.frogmc:frogloader:$version")
+    override fun froglib(action: Action<VersionConfiguration>) {
+        val conf = objects.newInstance(VersionConfiguration::class.java)
+        action.execute(conf)
+        if (conf.version == null) {
+            error("No froglib version provided!")
         }
-
-    override fun froglib(version: String) {
-        getProject().dependencies.add("implementation", "dev.frogmc:froglib:$version")
+        project.dependencies.add("modImplementation", "dev.frogmc:froglib:${conf.version!!}")
     }
 }

src/main/kotlin/dev/frogmc/phytotelma/mappings/Mappings.kt

@@ -0,0 +1,48 @@
+package dev.frogmc.phytotelma.mappings
+
+import dev.frogmc.thyroxine.api.data.DocumentationData
+import dev.frogmc.thyroxine.api.data.MappingBundle
+import dev.frogmc.thyroxine.api.data.MappingData
+
+fun MappingBundle.renameNamespaces(newSrc: String?, newDst: String): MappingBundle {
+    val oldData = if (srcNamespaces().size > 1 || dstNamespaces().size > 1) flattenData() else data[0]
+    val newData = MappingData(newSrc ?: oldData.srcNamespace, newDst)
+    val newDocs = DocumentationData(newDst)
+
+    oldData.apply {
+        newData.classes.putAll(classes)
+        newData.fields.putAll(fields)
+        newData.methods.putAll(methods)
+        newData.parameters.putAll(parameters)
+    }
+
+    return MappingBundle(newData, get(oldData.dstNamespace)?.let { newDocs.insert(it) })
+}
+
+fun MappingBundle.renameDstNamespace(newDst: String): MappingBundle {
+    return renameNamespaces(null, newDst)
+}
+
+fun MappingBundle.filterClasses(filter: (String) -> Boolean): MappingBundle {
+    val oldData = data.last()
+    val newData = MappingData(oldData.srcNamespace, oldData.dstNamespace)
+    val oldDocs = if (documentation.isNotEmpty()) documentation.last() else null
+
+    oldData.apply {
+        newData.classes.putAll(classes.filter { filter.invoke(it.value) })
+        newData.fields.putAll(fields.filter { newData.classes.containsKey(it.key.owner) })
+        newData.methods.putAll(methods.filter { newData.classes.containsKey(it.key.owner) })
+        newData.parameters.putAll(parameters.filter { newData.classes.containsKey(it.key.owner) })
+    }
+
+    val bundle = MappingBundle(data.subList(0, data.size - 1).plus(newData), mutableListOf())
+
+    if (oldDocs != null) {
+        val newDocs = DocumentationData(newData.dstNamespace)
+        newDocs.classes.addAll(oldDocs.classes.filter { filter.invoke(it.name) })
+        bundle.insert(newDocs)
+    }
+
+
+    return bundle
+}

src/main/kotlin/dev/frogmc/phytotelma/nest/Nester.kt

@@ -110,8 +110,8 @@ object Nester {
                     val matcher = pattern.matcher(version)
                     matcher.find()
                     val semver = matcher.group(1) +
-                            (if (matcher.group(2) != null) "-"+matcher.group(2) else "") +
-                            (if (matcher.group(3) != null) "+"+matcher.group(3) else "")
+                            (if (matcher.group(2) != null) "-" + matcher.group(2) else "") +
+                            (if (matcher.group(3) != null) "+" + matcher.group(3) else "")
                     it.getPath("frog.mod.toml").writeText(
                         """
                             [frog]

src/main/kotlin/dev/frogmc/phytotelma/run/AssetDownloader.kt

@@ -9,43 +9,59 @@ import dev.frogmc.phytotelma.common.CachingHttpClient
 import org.gradle.api.Project
 import java.net.URI
 import java.nio.charset.StandardCharsets
+import java.nio.file.Files
 import java.nio.file.Path
 import kotlin.io.path.createDirectories
+import kotlin.io.path.notExists
 import kotlin.io.path.reader
 
 object AssetDownloader {
     private const val ASSETS_URL = "https://resources.download.minecraft.net"
 
-    fun download(project: Project) {
+    fun download(project: Project, manualInvocation: Boolean = false) {
         val version = ProjectStorage.get(project).minecraftVersion!!
         val path = PhytotelmaPlugin.globalCacheDir.resolve("assets")
-        val id = VersionChecker.downloadAssetIndex(version, path.resolve("indexes"))
+        val assetIndex = VersionChecker.fetchVersionData(version).assetIndex
+        val dest = path.resolve("indexes").resolve(assetIndex.id + ".json")
+        var overwrite = manualInvocation
+        if (dest.notExists()) {
+            CachingHttpClient.getUncached(URI.create(assetIndex.url)).use {
+                Files.copy(it, dest)
+            }
+            overwrite = true
+        }
 
         val index = Gson().fromJson(
-            path.resolve("indexes").resolve("$id.json").reader(StandardCharsets.UTF_8),
+            path.resolve("indexes").resolve("${assetIndex.id}.json").reader(StandardCharsets.UTF_8),
             JsonObject::class.java
         )
         val objectsPath = path.resolve("objects")
         objectsPath.createDirectories()
         val entries = index.getAsJsonObject("objects").entrySet()
         val totalSize = entries.size
+        if (overwrite) {
             print("Downloading $totalSize assets... ()")
             System.out.flush()
+        }
         entries.forEachIndexed { i, it ->
             val hash = it.value.asJsonObject.get("hash").asString
             /*val size = it.value.asJsonObject.get("size").asInt
             val name = it.key*/
             // TODO asset downloading for versions <=1.7 (legacy)
-            print("\rDownloading $totalSize assets... ($i/$totalSize): $hash"+" ".repeat(30))
+            if (overwrite) {
+                print("\rDownloading $totalSize assets... ($i/$totalSize): $hash" + " ".repeat(30))
                 System.out.flush()
-            get(objectsPath, hash)
             }
-        println("\rDownloading $totalSize assets... Done!"+" ".repeat(50))
+            get(objectsPath, hash, overwrite)
+        }
+        if (overwrite) {
+            println("\rDownloading $totalSize assets... Done!" + " ".repeat(50))
+        }
     }
 
-    private fun get(localDir: Path, hash: String) {
+    private fun get(localDir: Path, hash: String, overwrite: Boolean) {
         val shortHash = hash.substring(0, 2)
         val path = localDir.resolve("$shortHash/$hash")
-        CachingHttpClient.downloadTo(URI.create("$ASSETS_URL/$shortHash/$hash"), path, true)
+        CachingHttpClient.downloadTo(URI.create("$ASSETS_URL/$shortHash/$hash"), path, overwrite)
     }
 }

src/main/kotlin/dev/frogmc/phytotelma/run/RunConfigGenerator.kt

@@ -34,7 +34,7 @@ object RunConfigGenerator {
             assetIndexPath.createDirectories()
         }
         val projectData = ProjectStorage.get(project)
-        val indexId = VersionChecker.downloadAssetIndex(projectData.minecraftVersion!!, assetIndexPath)
+        val indexId = VersionChecker.fetchVersionData(projectData.minecraftVersion!!).assetIndex.id
 
         val projectName = if (project.rootDir == project.projectDir) "" else " (${project.name})"
 

src/main/kotlin/dev/frogmc/phytotelma/run/task/RunGameTask.kt

@@ -29,7 +29,7 @@ abstract class RunGameTask @Inject constructor(env: Env) : JavaExec() {
         if (assetIndexPath.notExists()) {
             assetIndexPath.createDirectories()
         }
-        val indexId = VersionChecker.downloadAssetIndex(ProjectStorage.get(project).minecraftVersion!!, assetIndexPath)
+        val indexId = VersionChecker.fetchVersionData(ProjectStorage.get(project).minecraftVersion!!).assetIndex.id
         val log4jPath = project.rootDir.resolve(".gradle/phytotelma/log4j.xml").toPath().absolute()
         if (log4jPath.notExists()) {
             log4jPath.createParentDirectories()

src/main/kotlin/dev/frogmc/phytotelma/vineflower/FrogJavadocProvider.kt

@@ -0,0 +1,28 @@
+package dev.frogmc.phytotelma.vineflower
+
+import dev.frogmc.thyroxine.api.data.DocumentationData
+import net.fabricmc.fernflower.api.IFabricJavadocProvider
+import org.jetbrains.java.decompiler.struct.StructClass
+import org.jetbrains.java.decompiler.struct.StructField
+import org.jetbrains.java.decompiler.struct.StructMethod
+import java.util.stream.Collectors
+
+class FrogJavadocProvider(data: DocumentationData) : IFabricJavadocProvider {
+
+    private val classMap = data.classes.stream().collect(Collectors.toMap({ it.name() }, { it }))
+
+    override fun getClassDoc(structClass: StructClass): String? {
+        return classMap[structClass.qualifiedName]?.javadoc?.joinToString("\n")
+    }
+
+    override fun getFieldDoc(structClass: StructClass, structField: StructField): String? {
+        return classMap[structClass.qualifiedName]
+            ?.getField(structField.name, structField.descriptor)
+            ?.orElse(null)?.javadoc?.joinToString("\n")
+    }
+
+    override fun getMethodDoc(structClass: StructClass, structMethod: StructMethod): String? {
+        return classMap[structClass.qualifiedName]?.getMethod(structMethod.name, structMethod.descriptor)
+            ?.orElse(null)?.javadoc?.joinToString("\n")
+    }
+}

src/main/kotlin/dev/frogmc/phytotelma/vineflower/ParchmentJavadocProvider.kt

@@ -1,25 +0,0 @@
-package dev.frogmc.phytotelma.vineflower
-
-import dev.frogmc.thyroxine.api.data.Parchment
-import net.fabricmc.fernflower.api.IFabricJavadocProvider
-import org.jetbrains.java.decompiler.struct.StructClass
-import org.jetbrains.java.decompiler.struct.StructField
-import org.jetbrains.java.decompiler.struct.StructMethod
-
-class ParchmentJavadocProvider(private val parchment: Parchment) : IFabricJavadocProvider {
-    override fun getClassDoc(structClass: StructClass): String? {
-        return parchment.getClass(structClass.qualifiedName).orElse(null)?.javadoc?.joinToString("\n")
-    }
-
-    override fun getFieldDoc(structClass: StructClass, structField: StructField): String? {
-        return parchment.getClass(structClass.qualifiedName)
-            .flatMap { it.getField(structField.name, structField.descriptor) }
-            .orElse(null)?.javadoc?.joinToString("\n")
-    }
-
-    override fun getMethodDoc(structClass: StructClass, structMethod: StructMethod): String? {
-        return parchment.getClass(structClass.qualifiedName)
-            .flatMap { it.getMethod(structMethod.name, structMethod.descriptor) }
-            .orElse(null)?.javadoc?.joinToString("\n")
-    }
-}