fix: long files not read correctly

ConfigLib-Core/src/main/java/de/exlll/configlib/ConfigReader.java

@@ -10,7 +10,11 @@ enum ConfigReader {
     static String read(Path path) throws IOException {
         try (Scanner scanner = new Scanner(path)) {
             scanner.useDelimiter("\\z");
-            return scanner.next();
+            StringBuilder builder = new StringBuilder();
+            while (scanner.hasNext()) {
+                builder.append(scanner.next());
+            }
+            return builder.toString();
         }
     }
 }

ConfigLib-Core/src/main/java/de/exlll/configlib/Configuration.java

@@ -16,8 +16,8 @@ import java.util.Map;
 
 public abstract class Configuration {
     private final Path configPath;
-    private final YamlSerializer serializer;
     private final CommentAdder adder;
+    private YamlSerializer serializer;
 
     /**
      * Constructs a new {@code Configuration} instance.
@@ -30,13 +30,18 @@ public abstract class Configuration {
      */
     protected Configuration(Path configPath) {
         this.configPath = configPath;
-        this.serializer = new YamlSerializer(
-                createConstructor(), createRepresenter(),
-                createDumperOptions(), createResolver()
-        );
         this.adder = new CommentAdder(new Comments(getClass()));
     }
 
+    private void initSerializer() {
+        if (serializer == null) {
+            this.serializer = new YamlSerializer(
+                    createConstructor(), createRepresenter(),
+                    createDumperOptions(), createResolver()
+            );
+        }
+    }
+
     /**
      * Loads {@code this} configuration from a configuration file. The file is
      * located at the path pointed to by the {@code Path} object used to create
@@ -62,6 +67,7 @@ public abstract class Configuration {
     }
 
     private Map<String, Object> readAndDeserialize() throws IOException {
+        initSerializer();
         String yaml = ConfigReader.read(configPath);
         return serializer.deserialize(yaml);
     }
@@ -100,6 +106,7 @@ public abstract class Configuration {
      * @throws ParserException     if invalid YAML
      */
     public final void save() throws IOException {
+        initSerializer();
         createParentDirectories();
         Map<String, Object> map = FieldMapper.instanceToMap(this);
         version(map);