1 files changed, 126 insertions, 0 deletions
diff --git a/src/main/java/net/fabricmc/loom/extension/MixinApExtension.java b/src/main/java/net/fabricmc/loom/extension/MixinApExtension.java
new file mode 100644
index 00000000..e63700b1
--- /dev/null
+++ b/src/main/java/net/fabricmc/loom/extension/MixinApExtension.java
@@ -0,0 +1,126 @@
+/*
+ * This file is part of fabric-loom, licensed under the MIT License (MIT).
+ *
+ * Copyright (c) 2016-2017 FabricMC
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.fabricmc.loom.extension;
+
+import java.util.Collection;
+import java.util.Map;
+import java.util.Objects;
+import java.util.function.Function;
+import java.util.stream.Stream;
+
+import org.gradle.api.InvalidUserDataException;
+import org.gradle.api.Task;
+import org.gradle.api.artifacts.Configuration;
+import org.gradle.api.plugins.ExtraPropertiesExtension;
+import org.gradle.api.tasks.Input;
+import org.gradle.api.tasks.SourceSet;
+import org.gradle.api.tasks.util.PatternSet;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import net.fabricmc.loom.api.MixinApExtensionAPI;
+
+/**
+ * A gradle extension to configure mixin annotation processor.
+ */
+@ApiStatus.Experimental
+public interface MixinApExtension extends MixinApExtensionAPI {
+	String MIXIN_INFORMATION_CONTAINER = "mixin";
+
+	/**
+	 * An information container stores necessary information
+	 * for configuring the mixin annotation processor. It's stored
+	 * in [SourceSet].ext.mixin.
+	 */
+	final class MixinInformationContainer {
+		private final SourceSet sourceSet;
+		private final String refmapName;
+		private Stream<String> mixinJsonNames;
+
+		final PatternSet mixinJsonPattern;
+
+		public MixinInformationContainer(@NotNull SourceSet sourceSet,
+										@NotNull String refmapName,
+										@NotNull PatternSet mixinJsonPattern) {
+			this.sourceSet = sourceSet;
+			this.refmapName = refmapName;
+			this.mixinJsonPattern = mixinJsonPattern;
+		}
+
+		void setMixinJsonNames(@NotNull Stream<String> mixinJsonNames) {
+			if (this.mixinJsonNames == null) {
+				this.mixinJsonNames = mixinJsonNames;
+			}
+		}
+
+		@NotNull
+		public Stream<String> getMixinJsonNames() {
+			return Objects.requireNonNull(mixinJsonNames);
+		}
+
+		@NotNull
+		public SourceSet getSourceSet() {
+			return sourceSet;
+		}
+
+		@NotNull
+		public String getRefmapName() {
+			return refmapName;
+		}
+	}
+
+	@Nullable
+	static MixinInformationContainer getMixinInformationContainer(SourceSet sourceSet) {
+		ExtraPropertiesExtension extra = sourceSet.getExtensions().getExtraProperties();
+		return extra.has(MIXIN_INFORMATION_CONTAINER) ? (MixinInformationContainer) extra.get(MIXIN_INFORMATION_CONTAINER) : null;
+	}
+
+	static void setMixinInformationContainer(SourceSet sourceSet, MixinInformationContainer container) {
+		ExtraPropertiesExtension extra = sourceSet.getExtensions().getExtraProperties();
+
+		if (extra.has(MIXIN_INFORMATION_CONTAINER)) {
+			throw new InvalidUserDataException("The sourceSet " + sourceSet.getName()
+					+ " has been configured for mixin annotation processor multiple times");
+		}
+
+		extra.set(MIXIN_INFORMATION_CONTAINER, container);
+	}
+
+	@NotNull
+	Stream<SourceSet> getMixinSourceSetsStream();
+
+	@NotNull
+	Stream<Configuration> getApConfigurationsStream(Function<String, String> getApConfigNameFunc);
+
+	@NotNull
+	Stream<Map.Entry<SourceSet, Task>> getInvokerTasksStream(String compileTaskLanguage);
+
+	@NotNull
+	@Input
+	Collection<SourceSet> getMixinSourceSets();
+
+	void init();
+}