1 files changed, 91 insertions, 0 deletions
diff --git a/src/main/java/net/fabricmc/loom/configuration/JarManifestConfiguration.java b/src/main/java/net/fabricmc/loom/configuration/JarManifestConfiguration.java
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index 00000000..2cc68401
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+++ b/src/main/java/net/fabricmc/loom/configuration/JarManifestConfiguration.java
@@ -0,0 +1,91 @@
+/*
+ * This file is part of fabric-loom, licensed under the MIT License (MIT).
+ *
+ * Copyright (c) 2021 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.configuration;
+
+import java.util.Optional;
+import java.util.jar.Attributes;
+import java.util.jar.Manifest;
+
+import org.gradle.api.Project;
+import org.gradle.util.GradleVersion;
+
+import net.fabricmc.loom.LoomGradleExtension;
+import net.fabricmc.loom.LoomGradlePlugin;
+import net.fabricmc.loom.util.Constants;
+import net.fabricmc.tinyremapper.TinyRemapper;
+
+public final record JarManifestConfiguration(Project project) {
+	public void configure(Manifest manifest) {
+		// Dont set when running the reproducible build tests as it will break them when anything updates
+		if (Boolean.getBoolean("loom.test.reproducible")) {
+			return;
+		}
+
+		LoomGradleExtension extension = project.getExtensions().getByType(LoomGradleExtension.class);
+
+		Attributes attributes = manifest.getMainAttributes();
+		var tinyRemapperVersion = Optional.ofNullable(TinyRemapper.class.getPackage().getImplementationVersion());
+
+		attributes.putValue("Fabric-Gradle-Version", GradleVersion.current().getVersion());
+		attributes.putValue("Fabric-Loom-Version", LoomGradlePlugin.LOOM_VERSION);
+		attributes.putValue("Fabric-Mixin-Compile-Extensions-Version", Constants.Dependencies.Versions.MIXIN_COMPILE_EXTENSIONS);
+		attributes.putValue("Fabric-Minecraft-Version", extension.getMinecraftProvider().minecraftVersion());
+		tinyRemapperVersion.ifPresent(s -> attributes.putValue("Fabric-Tiny-Remapper-Version", s));
+		getLoaderVersion().ifPresent(s -> attributes.putValue("Fabric-Loader-Version", s));
+
+		// This can be overridden by mods if required
+		if (!attributes.containsKey("Fabric-Mixin-Version")) {
+			addMixinVersion(attributes);
+		}
+	}
+
+	private void addMixinVersion(Attributes attributes) {
+		// Not super ideal that this uses the mod compile classpath, should prob look into making this not a thing at somepoint
+		var dependency = project.getConfigurations().getByName(Constants.Configurations.LOADER_DEPENDENCIES)
+				.getDependencies()
+				.stream()
+				.filter(dep -> "sponge-mixin".equals(dep.getName()))
+				.findFirst();
+
+		if (dependency.isEmpty()) {
+			project.getLogger().warn("Could not determine Mixin version for jar manifest");
+			return;
+		}
+
+		attributes.putValue("Fabric-Mixin-Version", dependency.get().getVersion());
+		attributes.putValue("Fabric-Mixin-Group", dependency.get().getGroup());
+	}
+
+	private Optional<String> getLoaderVersion() {
+		LoomGradleExtension extension = project.getExtensions().getByType(LoomGradleExtension.class);
+
+		if (extension.getInstallerData() == null) {
+			project.getLogger().warn("Could not determine fabric loader version for jar manifest");
+			return Optional.empty();
+		}
+
+		return Optional.of(extension.getInstallerData().version());
+	}
+}