Make custom ingredient types and load conditions appear early in generated JSONs (#3020)

fabric-data-generation-api-v1/src/main/java/net/fabricmc/fabric/mixin/datagen/DataProviderMixin.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2016, 2017, 2018, 2019 FabricMC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.fabricmc.fabric.mixin.datagen;
+
+import it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import net.minecraft.data.DataProvider;
+
+import net.fabricmc.fabric.api.resource.conditions.v1.ResourceConditions;
+import net.fabricmc.fabric.impl.recipe.ingredient.CustomIngredientImpl;
+
+@Mixin(DataProvider.class)
+public interface DataProviderMixin {
+	/**
+	 * Adjust the default sort order of some keys provided by Fabric API.
+	 */
+	@Inject(method = "method_43808", at = @At("RETURN"))
+	private static void addFabricKeySortOrders(Object2IntOpenHashMap<String> map, CallbackInfo ci) {
+		map.put(ResourceConditions.CONDITIONS_KEY, -100); // always at the beginning
+		map.put(CustomIngredientImpl.TYPE_KEY, 0); // mimic vanilla "type"
+	}
+}

fabric-data-generation-api-v1/src/main/resources/fabric-data-generation-api-v1.mixins.json

@@ -4,6 +4,7 @@
   "compatibilityLevel": "JAVA_16",
   "mixins": [
     "loot.BlockLootTableGeneratorMixin",
+    "DataProviderMixin",
     "TagProviderMixin",
     "ModelProviderMixin",
     "TagBuilderMixin"