Build 1.21.7 with Stonecutter from the shared src/

Step 5 of #8. versions/1.21.7/src is gone; 1.21.7 builds from src/ as
:1.21.7.

1.21.7's copy differed from 1.21.8's in the player render state: Fabric
API's RenderStateDataKey only exists from 1.21.8 (fabric-rendering-v1
12.6.0), so 1.21.7 had no updateRenderState hook, no SaturnRenderState,
and looked players up by name for the cloak and hat. That stays the case:
- The cloak and hat use getData on >=1.21.8 and SaturnPlayer.get(name)
  before that.
- PlayerEntityRendererMixin's updateRenderState exists only on >=1.21.8,
  as flat ranges (>=1.21.9, else if >=1.21.8) calling a shared
  saturn$applyPlayer helper, instead of nested version blocks.
- SaturnRenderState's key only exists on >=1.21.8; the class is empty
  before.
- TODO: 1.21.6 and 1.21.7 still don't show the role icon in names.

1.21.7's NameTagMixin isn't carried over: it wasn't registered in any
mixin config, so it never ran.

The 1.21.7 jar differs from the old one only as 1.21.8's did in step 4
(entityAlpha and drawGroup helpers, getIconId, and the cloak getting its
buffer at the draw call), plus the empty SaturnRenderState and the
missing dead NameTagMixin. 1.21.8-1.21.11 only differ in
PlayerEntityRendererMixin (the helper).

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/main/java/org/saturnclient/impl/cosmetics/CloakFeatureRenderer.java

@@ -411,7 +411,10 @@ public class CloakFeatureRenderer extends FeatureRenderer<PlayerEntityRenderStat
             return;
         }
 
+        //? if >=1.21.8 {
         SaturnPlayer player = state.getData(SaturnRenderState.saturnDataKey);
+        //?} else
+        //SaturnPlayer player = SaturnPlayer.get(state.name);
 
         if (player == null) {
             return;

src/main/java/org/saturnclient/impl/cosmetics/HatFeatureRenderer.java

@@ -30,7 +30,10 @@ public class HatFeatureRenderer extends FeatureRenderer<PlayerEntityRenderState,
             //?} else
             //VertexConsumerProvider output,
             int light, PlayerEntityRenderState state, float limbAngle, float limbDistance) {
+        //? if >=1.21.8 {
         SaturnPlayer player = state.getData(SaturnRenderState.saturnDataKey);
+        //?} else
+        //SaturnPlayer player = SaturnPlayer.get(state.name);
 
         if (state.invisible || player == null || player.hat.isEmpty()) {
             return;

src/main/java/org/saturnclient/saturnclient/SaturnRenderState.java

@@ -2,13 +2,23 @@ package org.saturnclient.saturnclient;
 
 //? if >=1.21.11
 import org.jspecify.annotations.NonNull;
+//? if >=1.21.8 {
 import org.saturnclient.client.player.SaturnPlayer;
 
 import net.fabricmc.fabric.api.client.rendering.v1.RenderStateDataKey;
+//?}
 
+/**
+ * The key PlayerEntityRendererMixin stores each player's SaturnPlayer under in their render state.
+ * Fabric API's render state data only exists from 1.21.8, so older versions look players up by name.
+ */
 public class SaturnRenderState {
-    //? if >=1.21.11
+    //? if >=1.21.11 {
     @NonNull
     public static RenderStateDataKey<SaturnPlayer> saturnDataKey = RenderStateDataKey
             .create(() -> "saturn-client-player");
+    //?} else if >=1.21.8 {
+    /*public static RenderStateDataKey<SaturnPlayer> saturnDataKey = RenderStateDataKey
+            .create(() -> "saturn-client-player");
+    *///?}
 }

src/main/java/org/saturnclient/saturnclient/mixin/PlayerEntityRendererMixin.java

@@ -10,6 +10,7 @@ import net.minecraft.client.render.entity.LivingEntityRenderer;
 import net.minecraft.client.render.entity.PlayerEntityRenderer;
 import net.minecraft.client.render.entity.model.PlayerEntityModel;
 import net.minecraft.client.render.entity.state.PlayerEntityRenderState;
+import net.minecraft.entity.Entity;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.text.MutableText;
 import net.minecraft.text.Text;
@@ -39,15 +40,25 @@ public abstract class PlayerEntityRendererMixin
         this.addFeature(new CloakFeatureRenderer(this, ctx.getEquipmentModelLoader()));
     }
 
-    @Inject(method = "updateRenderState", at = @At("TAIL"))
+    // Stores the SaturnPlayer in the render state and adds the role icon to the name. Render state
+    // data only exists from 1.21.8.
+    // TODO: 1.21.6 and 1.21.7 don't show the role icon in player names.
     //? if >=1.21.9 {
+    @Inject(method = "updateRenderState", at = @At("TAIL"))
     public <A extends PlayerLikeEntity & ClientPlayerLikeEntity> void updateRenderState(
-            A entity, PlayerEntityRenderState state,
-    //?} else {
-    /*public void updateRenderState(
-            AbstractClientPlayerEntity entity, PlayerEntityRenderState state,
+            A entity, PlayerEntityRenderState state, float f, CallbackInfo ci) {
+        saturn$applyPlayer(entity, state);
+    }
+    //?} else if >=1.21.8 {
+    /*@Inject(method = "updateRenderState", at = @At("TAIL"))
+    public void updateRenderState(
+            AbstractClientPlayerEntity entity, PlayerEntityRenderState state, float f, CallbackInfo ci) {
+        saturn$applyPlayer(entity, state);
+    }
     *///?}
-            float f, CallbackInfo ci) {
+
+    //? if >=1.21.8 {
+    private void saturn$applyPlayer(Entity entity, PlayerEntityRenderState state) {
         if (entity == null) {
             return;
         }
@@ -66,4 +77,5 @@ public abstract class PlayerEntityRendererMixin
                     .append(state.displayName.copy());
         }
     }
+    //?}
 }