use one asset directory

src/main/java/net/fabricmc/loom/providers/MinecraftLibraryProvider.java

@@ -78,25 +78,12 @@ public class MinecraftLibraryProvider {
 		MinecraftVersionInfo.AssetIndex assetIndex = versionInfo.assetIndex;
 
 		// get existing cache files
-		project.getLogger().lifecycle(":checking for existing asset files");
+		File assets = new File(extension.getUserCache(), "assets");
-		Multimap<String, File> assetFilenameToFile = HashMultimap.create();
-		for (File assetDir : Objects.requireNonNull(extension.getUserCache().listFiles((f) -> f.isDirectory() && f.getName().startsWith("assets-")))) {
-			File objectsDir = new File(assetDir, "objects");
-			if (objectsDir.exists() && objectsDir.isDirectory()) {
-				for (File subDir : Objects.requireNonNull(objectsDir.listFiles(File::isDirectory))) {
-					for (File subFile : Objects.requireNonNull(subDir.listFiles(File::isFile))) {
-						assetFilenameToFile.put("objects" + File.separator + subDir.getName() + File.separator + subFile.getName(), subFile);
-					}
-				}
-			}
-		}
-
-		File assets = new File(extension.getUserCache(), "assets-" + minecraftProvider.minecraftVersion);
 		if (!assets.exists()) {
 			assets.mkdirs();
 		}
 
-		File assetsInfo = new File(assets, "indexes" + File.separator + assetIndex.id + ".json");
+		File assetsInfo = new File(assets, "indexes" + File.separator + assetIndex.getFabricId(minecraftProvider.minecraftVersion) + ".json");
 		if (!assetsInfo.exists() || !Checksum.equals(assetsInfo, assetIndex.sha1)) {
 			project.getLogger().lifecycle(":downloading asset index");
 			FileUtils.copyURLToFile(new URL(assetIndex.url), assetsInfo);
@@ -116,15 +103,6 @@ public class MinecraftLibraryProvider {
 			String sha1 = object.getHash();
 			String filename = "objects" + File.separator + sha1.substring(0, 2) + File.separator + sha1;
 			File file = new File(assets, filename);
-			if (!file.exists() && assetFilenameToFile.containsKey(filename)) {
-				project.getLogger().debug(":copying asset " + entry.getKey());
-				for (File srcFile : assetFilenameToFile.get(filename)) {
-					if (Checksum.equals(srcFile, sha1)) {
-						FileUtils.copyFile(srcFile, file);
-						break;
-					}
-				}
-			}
 
 			if (!file.exists() || !Checksum.equals(file, sha1)) {
 				project.getLogger().debug(":downloading asset " + entry.getKey());
@@ -138,6 +116,7 @@ public class MinecraftLibraryProvider {
 			progressLogger.progress(assetName + " - " + position + "/" + totalSize + " (" + (int) ((position / (double) totalSize) * 100) + "%) assets downloaded");
 			position++;
 		}
+
 		progressLogger.completed();
 	}
 

src/main/java/net/fabricmc/loom/providers/PomfProvider.java

@@ -77,7 +77,7 @@ public class PomfProvider {
 			GZIPInputStream gzipInputStream = new GZIPInputStream(new FileInputStream(MAPPINGS_TINY_GZ));
 			FileOutputStream fileOutputStream = new FileOutputStream(MAPPINGS_TINY);
 			int length;
-			byte[] buffer = new byte[1024];
+			byte[] buffer = new byte[4096];
 			while ((length = gzipInputStream.read(buffer)) > 0) {
 				fileOutputStream.write(buffer, 0, length);
 			}

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

@@ -53,7 +53,7 @@ public class RunClientTask extends JavaExec {
 		}
 
 		classpath(libs);
-		args("--tweakClass", Constants.FABRIC_CLIENT_TWEAKER, "--assetIndex", minecraftVersionInfo.assetIndex.id, "--assetsDir", new File(extension.getUserCache(), "assets-" + extension.getMinecraftProvider().minecraftVersion).getAbsolutePath(), "--fabricMappingFile", extension.getMinecraftProvider().pomfProvider.MAPPINGS_TINY.getAbsolutePath());
+		args("--tweakClass", Constants.FABRIC_CLIENT_TWEAKER, "--assetIndex", minecraftVersionInfo.assetIndex.getFabricId(extension.getMinecraftProvider().minecraftVersion), "--assetsDir", new File(extension.getUserCache(), "assets").getAbsolutePath(), "--fabricMappingFile", extension.getMinecraftProvider().pomfProvider.MAPPINGS_TINY.getAbsolutePath());
 
 		setWorkingDir(new File(getProject().getRootDir(), "run"));
 

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

@@ -93,7 +93,7 @@ public class IdeaRunConfig {
 		ideaClient.configName = "Minecraft Client";
 		ideaClient.runDir = "file://$PROJECT_DIR$/" + extension.runDir;
 		ideaClient.vmArgs = "-Dfabric.development=true";
-		ideaClient.programArgs = "--tweakClass " + Constants.FABRIC_CLIENT_TWEAKER + " --assetIndex " + minecraftVersionInfo.assetIndex.id + " --assetsDir \"" + new File(extension.getUserCache(), "assets-" + minecraftProvider.minecraftVersion).getAbsolutePath() + "\" --fabricMappingFile \"" + minecraftProvider.pomfProvider.MAPPINGS_TINY.getAbsolutePath() + "\"";
+		ideaClient.programArgs = "--tweakClass " + Constants.FABRIC_CLIENT_TWEAKER + " --assetIndex " + minecraftVersionInfo.assetIndex.getFabricId(extension.getMinecraftProvider().minecraftVersion) + " --assetsDir \"" + new File(extension.getUserCache(), "assets").getAbsolutePath() + "\" --fabricMappingFile \"" + minecraftProvider.pomfProvider.MAPPINGS_TINY.getAbsolutePath() + "\"";
 
 		return ideaClient;
 	}
@@ -115,7 +115,7 @@ public class IdeaRunConfig {
 	}
 
 	public String fromDummy() throws IOException {
-		InputStream input = SetupIntelijRunConfigs.class.getClassLoader().getResourceAsStream("dummy_runconfig.xml");
+		InputStream input = SetupIntelijRunConfigs.class.getClassLoader().getResourceAsStream("idea_run_config_template.xml");
 		String dummyConfig = IOUtils.toString(input, StandardCharsets.UTF_8);
 		input.close();
 

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

@@ -44,9 +44,17 @@ public class MinecraftVersionInfo {
 	}
 
 	public class AssetIndex {
-		public String id;
+		private String id;
 		public String sha1;
 		public String url;
+
+		public String getId() {
+			return id;
+		}
+
+		public String getFabricId(String version) {
+			return id.equals(version) ? version : version + "-" + id;
+		}
 	}
 
 	public class Library {