add: copy instance. Closes #687

HMCLCore/src/main/java/org/jackhuang/hmcl/mod/ModAdviser.java

@@ -45,7 +45,7 @@ public interface ModAdviser {
             "regex:(.*?)\\.log",
             "usernamecache.json", "usercache.json", // Minecraft
             "launcher_profiles.json", "launcher.pack.lzma", // Minecraft Launcher
-            "pack.json", "launcher.jar", "cache", "modpack.cfg", // HMCL
+            "backup", "pack.json", "launcher.jar", "cache", "modpack.cfg", // HMCL
             "manifest.json", "minecraftinstance.json", ".curseclient", // Curse
             ".fabric", ".mixin.out", // Fabric
             "jars", "logs", "versions", "assets", "libraries", "crash-reports", "NVIDIA", "AMD", "screenshots", "natives", "native", "$native", "server-resource-packs", // Minecraft

HMCLCore/src/main/java/org/jackhuang/hmcl/mod/Modpack.java

@@ -93,6 +93,8 @@ public final class Modpack {
         for (String s : blackList)
             if (path.equals(s))
                 return false;
+        if (whiteList == null || whiteList.isEmpty())
+            return true;
         for (String s : whiteList)
             if (path.equals(s))
                 return true;

HMCLCore/src/main/java/org/jackhuang/hmcl/util/FutureCallback.java

@@ -21,5 +21,14 @@ import java.util.function.Consumer;
 
 @FunctionalInterface
 public interface FutureCallback<T> {
-    void call(T obj, Runnable resolve, Consumer<String> reject);
+
+    /**
+     * Callback of future, called after future finishes.
+     * This callback gives the feedback whether the result of future is acceptable or not,
+     * if not, giving the reason, and future will be relaunched when necessary.
+     * @param result result of the future
+     * @param resolve accept the result
+     * @param reject reject the result with failure reason
+     */
+    void call(T result, Runnable resolve, Consumer<String> reject);
 }

HMCLCore/src/main/java/org/jackhuang/hmcl/util/io/FileUtils.java

@@ -30,6 +30,7 @@ import java.nio.file.attribute.BasicFileAttributes;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Objects;
+import java.util.function.Predicate;
 
 import static java.nio.charset.StandardCharsets.UTF_8;
 
@@ -196,20 +197,30 @@ public final class FileUtils {
      * @throws IOException if an I/O error occurs.
      */
     public static void copyDirectory(Path src, Path dest) throws IOException {
+        copyDirectory(src, dest, path -> true);
+    }
+
+    public static void copyDirectory(Path src, Path dest, Predicate<String> filePredicate) throws IOException {
         Files.walkFileTree(src, new SimpleFileVisitor<Path>(){
             @Override
             public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
+                if (!filePredicate.test(src.relativize(file).toString())) {
+                    return FileVisitResult.SKIP_SUBTREE;
+                }
+
                 Path destFile = dest.resolve(src.relativize(file).toString());
                 Files.copy(file, destFile, StandardCopyOption.REPLACE_EXISTING);
-
                 return FileVisitResult.CONTINUE;
             }
 
             @Override
             public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
+                if (!filePredicate.test(src.relativize(dir).toString())) {
+                    return FileVisitResult.SKIP_SUBTREE;
+                }
+
                 Path destDir = dest.resolve(src.relativize(dir).toString());
                 Files.createDirectories(destDir);
-
                 return FileVisitResult.CONTINUE;
             }
         });