Add --mappings-data artifact to output just the mappings.csv zip file.

Author: LexManos

src/main/java/net/minecraftforge/mcmaven/cli/MavenTask.java

@@ -72,6 +72,7 @@ static void run(String[] args) throws Exception {
 
         var parchmentO = parser.accepts("parchment",
             "Version of parchment mappings to use, snapshots are not supported")
+            .availableUnless(mappingsO)
             .withRequiredArg();
 
         var shorthandOptions = new HashMap<String, OptionSpecBuilder>();
@@ -80,7 +81,8 @@ static void run(String[] args) throws Exception {
             "fml",    Constants.FMLONLY_ARTIFACT,
             "mc",     "net.minecraft:joined",
             "client", "net.minecraft:client",
-            "server", "net.minecraft:server"
+            "server", "net.minecraft:server",
+            "mapping-data", "net.minecraft:mappings"
         );
         for (var entry : artifacts.entrySet()) {
             var key = entry.getKey();

src/main/java/net/minecraftforge/mcmaven/impl/mappings/Mappings.java

@@ -9,8 +9,6 @@
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.Set;
-
 import net.minecraftforge.mcmaven.impl.GlobalOptions;
 import net.minecraftforge.mcmaven.impl.repo.mcpconfig.MCPSide;
 import net.minecraftforge.mcmaven.impl.util.Artifact;

src/main/java/net/minecraftforge/mcmaven/impl/mappings/ParchmentMappings.java

@@ -16,7 +16,6 @@
 import java.util.Set;
 import java.util.TreeMap;
 import java.util.function.Function;
-import java.util.zip.Deflater;
 import java.util.zip.ZipFile;
 import java.util.zip.ZipOutputStream;
 
@@ -33,7 +32,6 @@
 import net.minecraftforge.srgutils.IMappingFile;
 import net.minecraftforge.util.file.FileUtils;
 import net.minecraftforge.util.hash.HashStore;
-import org.jetbrains.annotations.Nullable;
 
 public class ParchmentMappings extends Mappings {
     private Task downloadTask;
@@ -149,7 +147,7 @@ record Type(String file, Function<SideData, Map<String, Info>> data) {}
         FileUtils.ensureParent(output);
         try (var fos = new FileOutputStream(output);
              var out = new ZipOutputStream(fos)) {
-            out.setLevel(Deflater.NO_COMPRESSION); // Don't compress in case the system has custom zlib library, which will case hash differences
+            //out.setLevel(Deflater.NO_COMPRESSION); // Don't compress in case the system has custom zlib library, which will case hash differences
 
             var uncloseable = new OutputStreamWriter(out, StandardCharsets.UTF_8) {
                 public void close() throws IOException {

src/main/java/net/minecraftforge/mcmaven/impl/repo/mcpconfig/MCPConfigRepo.java

@@ -30,7 +30,6 @@
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.Set;
 
 /*
  * Provides the following artifacts:
@@ -93,10 +92,21 @@ public List<PendingArtifact> process(Artifact artifact, Mappings mappings) {
             throw new IllegalArgumentException("MCPConfigRepo cannot process modules that aren't for group net.minecraft");
 
         var side = module.substring("net.minecraft:".length());
+        boolean isMappings = "mappings".equals(side);
+        if (isMappings)
+            side = "joined";
+
         var mcp = this.get(Artifact.from("de.oceanlabs.mcp", "mcp_config", version, null, "zip"));
         var mcpSide = mcp.getSide(side);
-        var mcpTasks = mcpSide.getTasks();
 
+        if (isMappings) {
+            var name = mappings.getArtifact(mcpSide);
+            return List.of(
+                pending("Mappings", mappings.getCsvZip(mcpSide), name)
+            );
+        }
+
+        var mcpTasks = mcpSide.getTasks();
         var build = mcpSide.getBuildFolder();
         var name = Artifact.from("net.minecraft", side, version);
 

src/main/java/net/minecraftforge/mcmaven/impl/tasks/RenameTask.java

@@ -20,8 +20,6 @@
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
-import java.util.Set;
-import java.util.function.Supplier;
 import java.util.zip.ZipInputStream;
 import java.util.zip.ZipOutputStream;