Respect reproducibleFileOrder and preserveFileTimestamps (#304)

* Respect reproducibleFileOrder and preserveFileTimestamps

* Also Respect On Sources Jars

* java 8

* checkstyle

* Please Rerun Actions

src/main/java/net/fabricmc/loom/task/RemapJarTask.java

@@ -48,6 +48,7 @@ import net.fabricmc.loom.util.GradleSupport;
 import net.fabricmc.loom.util.MixinRefmapHelper;
 import net.fabricmc.loom.util.NestedJars;
 import net.fabricmc.loom.util.TinyRemapperMappingsHelper;
+import net.fabricmc.loom.util.ZipReprocessorUtil;
 import net.fabricmc.loom.util.accesswidener.AccessWidenerJarProcessor;
 import net.fabricmc.loom.util.JarRemapper;
 import net.fabricmc.stitch.util.Pair;
@@ -151,16 +152,9 @@ public class RemapJarTask extends Jar {
 			}
 		}
 
-		/*try {
+		if (isReproducibleFileOrder() || isPreserveFileTimestamps()) {
-			if (modJar.exists()) {
+			ZipReprocessorUtil.reprocessZip(output.toFile(), isReproducibleFileOrder(), isPreserveFileTimestamps());
-				Files.move(modJar, modJarUnmappedCopy);
-				extension.addUnmappedMod(modJarUnmappedCopy);
 		}
-
-			Files.move(modJarOutput, modJar);
-		} catch (IOException e) {
-			throw new RuntimeException(e);
-		}*/
 	}
 
 	public void scheduleRemap() throws Throwable {

src/main/java/net/fabricmc/loom/task/RemapSourcesJarTask.java

@@ -26,6 +26,8 @@ package net.fabricmc.loom.task;
 
 import java.io.File;
 
+import org.gradle.api.model.ObjectFactory;
+import org.gradle.api.provider.Property;
 import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.InputFile;
 import org.gradle.api.tasks.Internal;
@@ -33,19 +35,29 @@ import org.gradle.api.tasks.OutputFile;
 import org.gradle.api.tasks.TaskAction;
 
 import net.fabricmc.loom.util.SourceRemapper;
+import net.fabricmc.loom.util.ZipReprocessorUtil;
 
 public class RemapSourcesJarTask extends AbstractLoomTask {
 	private Object input;
 	private Object output;
 	private String direction = "intermediary";
 	private SourceRemapper sourceRemapper = null;
+	private final Property<Boolean> archivePreserveFileTimestamps;
+	private final Property<Boolean> archiveReproducibleFileOrder;
+
+	public RemapSourcesJarTask() {
+		ObjectFactory objectFactory = getProject().getObjects();
+		archivePreserveFileTimestamps = objectFactory.property(Boolean.class);
+		archiveReproducibleFileOrder = objectFactory.property(Boolean.class);
+	}
 
 	@TaskAction
 	public void remap() throws Exception {
 		if (sourceRemapper == null) {
 			SourceRemapper.remapSources(getProject(), getInput(), getOutput(), direction.equals("named"));
+			ZipReprocessorUtil.reprocessZip(getOutput(), archivePreserveFileTimestamps.getOrElse(true), archiveReproducibleFileOrder.getOrElse(false));
 		} else {
-			sourceRemapper.scheduleRemapSources(getInput(), getOutput());
+			sourceRemapper.scheduleRemapSources(getInput(), getOutput(), archivePreserveFileTimestamps.getOrElse(true), archiveReproducibleFileOrder.getOrElse(false));
 		}
 	}
 

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

@@ -164,7 +164,7 @@ public class ModCompileRemapper {
 
 		if (!remappedSources.exists() || sources.lastModified() <= 0 || sources.lastModified() > remappedSources.lastModified() || refreshDeps) {
 			try {
-				sourceRemapper.scheduleRemapSources(sources, remappedSources);
+				sourceRemapper.scheduleRemapSources(sources, remappedSources, false, true); // Depenedency sources are used in ide only so don't need to be reproducable
 
 				// Set the remapped sources creation date to match the sources if we're likely succeeded in making it
 				remappedSources.setLastModified(sources.lastModified());

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

@@ -62,15 +62,21 @@ public class SourceRemapper {
 
 	public static void remapSources(Project project, File input, File output, boolean named) throws Exception {
 		SourceRemapper sourceRemapper = new SourceRemapper(project, named);
-		sourceRemapper.scheduleRemapSources(input, output);
+		sourceRemapper.scheduleRemapSources(input, output, false, true);
 		sourceRemapper.remapAll();
 	}
 
+	@Deprecated
 	public void scheduleRemapSources(File source, File destination) throws Exception {
+		scheduleRemapSources(source, destination, false, true); // Not reproducable by default, old behavior
+	}
+
+	public void scheduleRemapSources(File source, File destination, boolean reproducibleFileOrder, boolean preserveFileTimestamps) throws Exception {
 		remapTasks.add((logger) -> {
 			try {
 				logger.progress("remapping sources - " + source.getName());
 				remapSourcesInner(source, destination);
+				ZipReprocessorUtil.reprocessZip(destination, reproducibleFileOrder, preserveFileTimestamps);
 			} catch (Exception e) {
 				throw new RuntimeException("Failed to remap sources for " + source, e);
 			}

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

@@ -0,0 +1,79 @@
+/*
+ * 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 java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipFile;
+import java.util.zip.ZipOutputStream;
+
+public class ZipReprocessorUtil {
+	private ZipReprocessorUtil() { }
+
+	public static void reprocessZip(File file, boolean reproducibleFileOrder, boolean preserveFileTimestamps) throws IOException {
+		if (!reproducibleFileOrder && preserveFileTimestamps) {
+			return;
+		}
+
+		try (ZipFile zipFile = new ZipFile(file)) {
+			ZipEntry[] entries;
+
+			if (reproducibleFileOrder) {
+				entries = zipFile.stream().sorted((a, b) -> a.getName().compareTo(b.getName())).toArray(ZipEntry[]::new);
+			} else {
+				entries = zipFile.stream().toArray(ZipEntry[]::new);
+			}
+
+			ByteArrayOutputStream outZip = new ByteArrayOutputStream(zipFile.size());
+
+			try (ZipOutputStream zipOutputStream = new ZipOutputStream(outZip)) {
+				for (ZipEntry entry : entries) {
+					if (!preserveFileTimestamps) {
+						entry.setTime(0);
+					}
+
+					zipOutputStream.putNextEntry(entry);
+					InputStream inputStream = zipFile.getInputStream(entry);
+					byte[] buf = new byte[1024];
+					int length;
+
+					while ((length = inputStream.read(buf)) > 0) {
+						zipOutputStream.write(buf, 0, length);
+					}
+
+					zipOutputStream.closeEntry();
+				}
+			}
+
+			try (FileOutputStream fileOutputStream = new FileOutputStream(file)) {
+				outZip.writeTo(fileOutputStream);
+			}
+		}
+	}
+}