Add GenerateUnpickData task (#27)

Author: Earthcomputer

build.gradle

@@ -15,6 +15,10 @@ repositories {
         name = 'MinecraftForge'
         url = 'https://maven.minecraftforge.net/'
     }
+    maven {
+        name = 'FabricMC'
+        url = 'https://maven.fabricmc.net/'
+    }
     gradlePluginPortal()
     mavenCentral()
 }
@@ -26,6 +30,7 @@ dependencies {
     implementation 'net.minecraftforge:srgutils:0.4.9'
     implementation 'org.parchmentmc.feather:io-moshi:1.0.0.3'
     implementation 'com.google.guava:guava:31.1-jre'
+    implementation 'net.fabricmc.unpick:unpick-format-utils:2.3.0'
 
     testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.2'
     testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.8.2'

src/main/java/org/parchmentmc/compass/tasks/GenerateUnpickData.java

@@ -0,0 +1,47 @@
+package org.parchmentmc.compass.tasks;
+
+import com.google.common.io.Files;
+import daomephsta.unpick.constantmappers.datadriven.parser.v2.UnpickV2Reader;
+import daomephsta.unpick.constantmappers.datadriven.parser.v2.UnpickV2Writer;
+import org.gradle.api.DefaultTask;
+import org.gradle.api.file.DirectoryProperty;
+import org.gradle.api.file.RegularFileProperty;
+import org.gradle.api.tasks.InputDirectory;
+import org.gradle.api.tasks.OutputFile;
+import org.gradle.api.tasks.TaskAction;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.List;
+
+public abstract class GenerateUnpickData extends DefaultTask {
+    @TaskAction
+    public void run() throws IOException {
+        List<File> files = new ArrayList<>(getInputDirectory().getAsFileTree().getFiles());
+        files.sort(Comparator.comparing(File::getName));
+
+        UnpickV2Writer writer = new UnpickV2Writer();
+        for (File file : files) {
+            if (!file.getName().endsWith(".unpick")) {
+                continue;
+            }
+
+            try (UnpickV2Reader reader = new UnpickV2Reader(new FileInputStream(file))) {
+                reader.accept(writer);
+            }
+        }
+
+        Files.asCharSink(getOutput().get().getAsFile(), StandardCharsets.UTF_8)
+            .write(writer.getOutput().replace(System.lineSeparator(), "\n"));
+    }
+
+    @InputDirectory
+    public abstract DirectoryProperty getInputDirectory();
+
+    @OutputFile
+    public abstract RegularFileProperty getOutput();
+}