Start on 0.2.1

src/main/java/net/fabricmc/loom/util/NestedJars.java

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+/*
+ * This file is part of fabric-loom, licensed under the MIT License (MIT).
+ *
+ * Copyright (c) 2016, 2017, 2018 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.util;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonObject;
+import net.fabricmc.loom.task.RemapJar;
+import org.gradle.api.Project;
+import org.gradle.api.Task;
+import org.gradle.api.artifacts.Configuration;
+import org.gradle.api.artifacts.Dependency;
+import org.gradle.api.artifacts.DependencySet;
+import org.gradle.api.artifacts.ProjectDependency;
+import org.zeroturnaround.zip.FileSource;
+import org.zeroturnaround.zip.ZipEntrySource;
+import org.zeroturnaround.zip.ZipUtil;
+import org.zeroturnaround.zip.transform.StringZipEntryTransformer;
+import org.zeroturnaround.zip.transform.ZipEntryTransformerEntry;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.zip.ZipEntry;
+
+public class NestedJars {
+
+	private static final Gson GSON = new GsonBuilder().setPrettyPrinting().create();
+
+	public static boolean addNestedJars(Project project, File modJar) {
+		if (getContainedJars(project).isEmpty()) {
+			return false;
+		}
+
+		ZipUtil.addEntries(modJar, getContainedJars(project).stream().map(file -> new FileSource("META-INF/jars/" + file.getName(), file)).toArray(ZipEntrySource[]::new));
+
+		return ZipUtil.transformEntries(modJar, single(new ZipEntryTransformerEntry("fabric.mod.json", new StringZipEntryTransformer() {
+			@Override
+			protected String transform(ZipEntry zipEntry, String input) throws IOException {
+				JsonObject json = GSON.fromJson(input, JsonObject.class);
+				JsonArray nestedJars = json.getAsJsonArray("jars");
+				if (nestedJars == null || !json.has("jars")) {
+					nestedJars = new JsonArray();
+				}
+
+				for (File file : getContainedJars(project)) {
+					JsonObject jsonObject = new JsonObject();
+					jsonObject.addProperty("file", "META-INF/jars/" + file.getName());
+					nestedJars.add(jsonObject);
+				}
+
+				json.add("jars", nestedJars);
+
+				return GSON.toJson(json);
+			}
+		})));
+	}
+
+	private static List<File> getContainedJars(Project project) {
+
+		List<File> fileList = new ArrayList<>();
+
+		Configuration configuration = project.getConfigurations().getByName(Constants.INCLUDE);
+		DependencySet dependencies = configuration.getDependencies();
+		for (Dependency dependency : dependencies) {
+			if (dependency instanceof ProjectDependency) {
+				ProjectDependency projectDependency = (ProjectDependency) dependency;
+				Project dependencyProject = projectDependency.getDependencyProject();
+
+				//TODO change this to allow just normal jar tasks, so a project can have a none loom sub project
+				for (Task task : dependencyProject.getTasksByName("remapJar", false)) {
+					if (task instanceof RemapJar) {
+						fileList.add(((RemapJar) task).jar);
+					}
+				}
+			} else {
+				fileList.addAll(configuration.files(dependency));
+			}
+		}
+		for (File file : fileList) {
+			if (!file.exists()) {
+				throw new RuntimeException("Failed to include nested jars, as it could not be found @ " + file.getAbsolutePath());
+			}
+			if (file.isDirectory() || !file.getName().endsWith(".jar")) {
+				throw new RuntimeException("Failed to include nested jars, as file was not a jar: " + file.getAbsolutePath());
+			}
+		}
+		return fileList;
+	}
+
+	private static ZipEntryTransformerEntry[] single(ZipEntryTransformerEntry element) {
+		return new ZipEntryTransformerEntry[]{element};
+	}
+}