Add crude mappings/transformer support

8 files changed, 232 insertions, 17 deletions

diff --git a/archenemyexample/build.gradle.kts b/archenemyexample/build.gradle.kts
index eb0d9ff..6ed1dbe 100644
--- a/archenemyexample/build.gradle.kts
+++ b/archenemyexample/build.gradle.kts
@@ -19,7 +19,13 @@ kotlin {
         compilations.named("main").get().run {
             defaultSourceSet.dependsOn(allJvm)
             this.dependencies {
-                implementation(mojang.minecraft("1.8.9", MCSide.CLIENT))
+                val mappedMinecraft = mojang.mapJar(
+                    mojang.minecraft("1.20.2", MCSide.CLIENT) as ModuleDependency,
+                    mojang.officialMappings("1.20.2", MCSide.CLIENT),
+                    "official",
+                    "named"
+                )
+                implementation(mappedMinecraft)
             }
         }
     }
diff --git a/archenemyexample/src/forgeMain/kotlin/doStuff.kt b/archenemyexample/src/forgeMain/kotlin/doStuff.kt
index 659bc2b..1e773ef 100644
--- a/archenemyexample/src/forgeMain/kotlin/doStuff.kt
+++ b/archenemyexample/src/forgeMain/kotlin/doStuff.kt
@@ -1,3 +1,3 @@
 actual fun doStuff(args: Int) {
-
+    val x: a = TODO()
 }
\ No newline at end of file
diff --git a/plugin/src/main/kotlin/moe/nea/archenemy/mojang/ArchenemyMojangExtension.kt b/plugin/src/main/kotlin/moe/nea/archenemy/mojang/ArchenemyMojangExtension.kt
index b3b3cfd..b80fe89 100644
--- a/plugin/src/main/kotlin/moe/nea/archenemy/mojang/ArchenemyMojangExtension.kt
+++ b/plugin/src/main/kotlin/moe/nea/archenemy/mojang/ArchenemyMojangExtension.kt
@@ -4,6 +4,8 @@ import moe.nea.archenemy.MCSide
 import net.minecraftforge.artifactural.gradle.GradleRepositoryAdapter
 import org.gradle.api.Project
 import org.gradle.api.artifacts.Dependency
+import org.gradle.api.artifacts.ModuleDependency
+import java.io.File
 import java.net.URI
 
 abstract class ArchenemyMojangExtension(val project: Project) {
@@ -16,12 +18,51 @@ abstract class ArchenemyMojangExtension(val project: Project) {
             sharedExtension.getLocalCacheDirectory().resolve("minecraft-provider"),
             sharedExtension.minecraftProvider
         )
+        GradleRepositoryAdapter.add(
+            project.repositories,
+            "Minecraft Mapped Provider",
+            getLocalCacheDirectory().resolve("minecraft-transformation-provider"),
+            mappedRepositoryProvider
+        )
         project.repositories.maven {
             it.name = "Minecraft Libraries"
             it.url = URI("https://libraries.minecraft.net/")
         }
     }
 
+    private val mappedRepositoryProvider = MappedRepositoryProvider(this)
+
+
+    fun officialMappings(version: String, side: MCSide): MappingDependency {
+        _registerMinecraftProvider
+        val dependency by lazy {
+            project.dependencies.create(
+                sharedExtension.minecraftProvider.getMappingsDependencyCoordinate(
+                    MinecraftProvider.MinecraftCoordinate(
+                        version,
+                        side
+                    )
+                )
+            )
+        }
+        return OfficialMappingDependency(side, version, project.providers.provider { dependency })
+    }
+
+    fun mapJar(
+        dependency: ModuleDependency,
+        mappings: MappingDependency,
+        sourceNamespace: String,
+        destinationNamespace: String
+    ): Dependency {
+        _registerMinecraftProvider
+        return project.dependencies.create(
+            mappedRepositoryProvider.getDependencyCoordiante(
+                MappedRepositoryProvider.MappedCoordinates(
+                    dependency, mappings, sourceNamespace, destinationNamespace
+                )
+            )
+        )
+    }
 
     fun minecraft(version: String, side: MCSide): Dependency {
         _registerMinecraftProvider
@@ -35,4 +76,9 @@ abstract class ArchenemyMojangExtension(val project: Project) {
         )
     }
 
+    fun getLocalCacheDirectory(): File {
+        return sharedExtension.getLocalCacheDirectory().resolve("projectspecific")
+            .resolve(if (project == project.rootProject) "__root" else project.path.replace(":", "_"))
+    }
+
 }
\ No newline at end of file
diff --git a/plugin/src/main/kotlin/moe/nea/archenemy/mojang/MappedRepositoryProvider.kt b/plugin/src/main/kotlin/moe/nea/archenemy/mojang/MappedRepositoryProvider.kt
new file mode 100644
index 0000000..d176d45
--- /dev/null
+++ b/plugin/src/main/kotlin/moe/nea/archenemy/mojang/MappedRepositoryProvider.kt
@@ -0,0 +1,99 @@
+package moe.nea.archenemy.mojang
+
+import moe.nea.archenemy.DownloadUtils
+import moe.nea.archenemy.util.getNullsafeIdentifier
+import net.minecraftforge.artifactural.api.artifact.Artifact
+import net.minecraftforge.artifactural.api.artifact.ArtifactIdentifier
+import net.minecraftforge.artifactural.api.artifact.ArtifactType
+import net.minecraftforge.artifactural.api.repository.Repository
+import net.minecraftforge.artifactural.base.artifact.StreamableArtifact
+import org.gradle.api.artifacts.ModuleDependency
+import java.security.MessageDigest
+
+class MappedRepositoryProvider(
+    val sharedExtension: ArchenemyMojangExtension
+) : Repository {
+
+    data class MappedCoordinates(
+        val dependency: ModuleDependency,
+        val mappings: MappingDependency,
+        val from: String,
+        val to: String,
+    ) {
+        val transformerHash by lazy {
+            val messageDigest = MessageDigest.getInstance("SHA-256")
+            messageDigest.updateField("name", dependency.name)
+            messageDigest.updateField("from", from)
+            messageDigest.updateField("to", to)
+            messageDigest.updateField("version", dependency.version ?: "null")
+            messageDigest.updateField("group", dependency.group ?: "null")
+            mappings.updateHash(messageDigest)
+            DownloadUtils.bytesToHex(messageDigest.digest())
+        }
+    }
+
+    private val providers = mutableMapOf<String, MappedCoordinates>()
+    private val cacheDir = sharedExtension.getLocalCacheDirectory().resolve("minecraft-transformer-cache")
+
+
+    fun getDependencyCoordiante(coordinates: MappedCoordinates): String {
+        providers[coordinates.transformerHash] = coordinates
+        return "archenemy.remapped.${coordinates.transformerHash}.${coordinates.mappings.title()}-${coordinates.to}.${coordinates.dependency.group}:${coordinates.dependency.name}:${coordinates.dependency.version}"
+    }
+
+    fun getDependencyCoordiante(
+        dependency: ModuleDependency,
+        mappings: MappingDependency,
+        from: String,
+        to: String
+    ): String {
+        val coordinates = MappedCoordinates(dependency, mappings, from, to)
+        return getDependencyCoordiante(coordinates)
+    }
+
+
+    override fun getArtifact(identifier: ArtifactIdentifier?): Artifact {
+        if (identifier == null) return Artifact.none()
+        if (!identifier.group.startsWith("archenemy.remapped.")) return Artifact.none()
+        if (identifier.extension != "jar") return Artifact.none() // TODO: support other artifacts (and poms)
+        val hash = identifier.group.split(".")[2]
+        val coordinates = providers[hash] ?: error("Unregistered mapped dependency $identifier")
+        val (group, name, version) = getDependencyCoordiante(coordinates).split(":")
+        if (group != identifier.group || name != identifier.name || version != identifier.version)
+            error("Inconsistent mapped dependency $identifier (expected $coordinates)")
+
+        return getArtifact(coordinates, getNullsafeIdentifier(identifier)) ?: Artifact.none()
+    }
+
+    private fun getArtifact(coordinates: MappedCoordinates, identifier: ArtifactIdentifier): Artifact? {
+        if ((identifier.classifier ?: "") != "") return null
+        val files = sharedExtension.project.configurations.detachedConfiguration(
+            coordinates.dependency,
+            coordinates.mappings.get()
+        ).also { it.isTransitive = false }.resolve()
+        // TODO: move away from classifiers. those are *evil*.
+        // for now i will just manually append -client
+        // or figure out how loom does it, i suppose
+        val sourceName = listOfNotNull(
+            coordinates.dependency.name,
+            coordinates.dependency.version,
+            coordinates.dependency.artifacts.single().classifier
+        ).joinToString(separator = "-", postfix = ".jar")
+        val sourceFile = files.singleOrNull { it.name == sourceName } ?: return null
+        val mappingsFile = coordinates.mappings.findMapping(files) ?: error("Could not find mappings file")
+        val targetFile = cacheDir.resolve(coordinates.transformerHash + ".jar")
+        targetFile.parentFile.mkdirs()
+        return StreamableArtifact.ofStreamable(identifier, ArtifactType.BINARY) {
+            if (!targetFile.exists()) {
+                coordinates.mappings.applyMapping(
+                    mappingsFile = mappingsFile,
+                    sourceFile = sourceFile,
+                    targetFile = targetFile,
+                    sourceNameSpace = coordinates.from,
+                    targetNameSpace = coordinates.to
+                )
+            }
+            targetFile.inputStream()
+        }
+    }
+}
\ No newline at end of file
diff --git a/plugin/src/main/kotlin/moe/nea/archenemy/mojang/MappingDependency.kt b/plugin/src/main/kotlin/moe/nea/archenemy/mojang/MappingDependency.kt
new file mode 100644
index 0000000..a0e1b14
--- /dev/null
+++ b/plugin/src/main/kotlin/moe/nea/archenemy/mojang/MappingDependency.kt
@@ -0,0 +1,19 @@
+package moe.nea.archenemy.mojang
+
+import org.gradle.api.artifacts.Dependency
+import org.gradle.api.provider.Provider
+import java.io.File
+import java.security.MessageDigest
+
+interface MappingDependency : Provider<Dependency> {
+    fun updateHash(digest: MessageDigest)
+    fun title(): String
+    fun findMapping(files: Set<File>): File?
+    fun applyMapping(
+        mappingsFile: File,
+        sourceFile: File,
+        targetFile: File,
+        sourceNameSpace: String,
+        targetNameSpace: String,
+    )
+}
\ No newline at end of file
diff --git a/plugin/src/main/kotlin/moe/nea/archenemy/mojang/MinecraftProvider.kt b/plugin/src/main/kotlin/moe/nea/archenemy/mojang/MinecraftProvider.kt
index 845d3e7..64c1d04 100644
--- a/plugin/src/main/kotlin/moe/nea/archenemy/mojang/MinecraftProvider.kt
+++ b/plugin/src/main/kotlin/moe/nea/archenemy/mojang/MinecraftProvider.kt
@@ -4,6 +4,7 @@ import kotlinx.serialization.json.Json
 import kotlinx.serialization.json.decodeFromStream
 import moe.nea.archenemy.DownloadUtils
 import moe.nea.archenemy.MCSide
+import moe.nea.archenemy.util.getNullsafeIdentifier
 import net.minecraftforge.artifactural.api.artifact.Artifact
 import net.minecraftforge.artifactural.api.artifact.ArtifactIdentifier
 import net.minecraftforge.artifactural.api.artifact.ArtifactType
@@ -29,7 +30,6 @@ fun MessageDigest.update(text: String) {
 
 class MinecraftProvider(val sharedExtension: ArchenemySharedExtension) : Repository {
 
-
     data class MinecraftCoordinate(
         val version: String,
         val side: MCSide,
@@ -74,7 +74,7 @@ class MinecraftProvider(val sharedExtension: ArchenemySharedExtension) : Reposit
         val downloadType = when (coordinate.side) {
             MCSide.CLIENT -> "client"
             MCSide.SERVER -> "server"
-        } + if (mappings) "-mappings" else ""
+        } + if (mappings) "_mappings" else ""
         val download = metadata.downloads[downloadType]
             ?: throw IOException("Invalid minecraft side $downloadType for ${coordinate.version}")
         val targetFile =
@@ -96,21 +96,11 @@ class MinecraftProvider(val sharedExtension: ArchenemySharedExtension) : Reposit
         }
     }
 
-    fun getNullsafeIdentifier(identifier: ArtifactIdentifier): ArtifactIdentifier {
-        return object : ArtifactIdentifier by identifier {
-            override fun getClassifier(): String {
-                return if (identifier.classifier == null)
-                    ""
-                else
-                    identifier.classifier
-            }
-        }
-    }
 
     override fun getArtifact(identifier: ArtifactIdentifier?): Artifact {
         if (identifier == null) return Artifact.none()
         if (identifier.name != "minecraft") return Artifact.none()
-        if (!identifier.group.startsWith("archenemy.")) return Artifact.none()
+        if (identifier.group != "archenemy.mojang") return Artifact.none()
         if (identifier.extension == "pom") return Artifact.none()
         val coordinate =
             MinecraftCoordinate(identifier.version, MCSide.valueOf(identifier.classifier.removeSuffix("-mappings")))
@@ -133,6 +123,5 @@ class MinecraftProvider(val sharedExtension: ArchenemySharedExtension) : Reposit
         }
         return Artifact.none()
     }
+}
 
-
-}
\ No newline at end of file
diff --git a/plugin/src/main/kotlin/moe/nea/archenemy/mojang/OfficialMappingDependency.kt b/plugin/src/main/kotlin/moe/nea/archenemy/mojang/OfficialMappingDependency.kt
new file mode 100644
index 0000000..8617ede
--- /dev/null
+++ b/plugin/src/main/kotlin/moe/nea/archenemy/mojang/OfficialMappingDependency.kt
@@ -0,0 +1,42 @@
+package moe.nea.archenemy.mojang
+
+import moe.nea.archenemy.MCSide
+import org.gradle.api.artifacts.Dependency
+import org.gradle.api.provider.Provider
+import java.io.File
+import java.security.MessageDigest
+
+class OfficialMappingDependency(
+    val side: MCSide,
+    val version: String,
+    val dependency: Provider<Dependency>
+) : MappingDependency,
+    Provider<Dependency> by dependency {
+
+    override fun updateHash(digest: MessageDigest) {
+        digest.update("official")
+        digest.updateField("side", side.toString())
+        digest.updateField("version", version)
+    }
+
+    override fun title(): String {
+        return "official-$side-${version.replace(".","_")}"
+    }
+
+    override fun findMapping(files: Set<File>): File? {
+        return files.singleOrNull {
+            it.name == "minecraft-${version}-${side}-mappings.txt"
+        }
+    }
+
+    override fun applyMapping(
+        mappingsFile: File,
+        sourceFile: File,
+        targetFile: File,
+        sourceNameSpace: String,
+        targetNameSpace: String
+    ) {
+        sourceFile.copyTo(targetFile)
+    }
+
+}
\ No newline at end of file
diff --git a/plugin/src/main/kotlin/moe/nea/archenemy/util/GetNullsafeIdentifier.kt b/plugin/src/main/kotlin/moe/nea/archenemy/util/GetNullsafeIdentifier.kt
new file mode 100644
index 0000000..9d9a422
--- /dev/null
+++ b/plugin/src/main/kotlin/moe/nea/archenemy/util/GetNullsafeIdentifier.kt
@@ -0,0 +1,14 @@
+package moe.nea.archenemy.util
+
+import net.minecraftforge.artifactural.api.artifact.ArtifactIdentifier
+
+fun getNullsafeIdentifier(identifier: ArtifactIdentifier): ArtifactIdentifier {
+    return object : ArtifactIdentifier by identifier {
+        override fun getClassifier(): String {
+            return if (identifier.classifier == null)
+                ""
+            else
+                identifier.classifier
+        }
+    }
+}
\ No newline at end of file