Use internal logging for --log-file instead of copying stdio/stderr to file (which doesn't work for native code or sub-process console output anyway)

source/net/filebot/Logging.java

@@ -9,6 +9,7 @@ import java.io.PrintStream;
 import java.io.PrintWriter;
 import java.io.StringWriter;
 import java.nio.channels.FileChannel;
+import java.nio.file.StandardOpenOption;
 import java.util.function.Supplier;
 import java.util.logging.Formatter;
 import java.util.logging.Handler;
@@ -48,7 +49,21 @@ public final class Logging {
 		return handler;
 	}
 
-	public static StreamHandler createLogFileHandler(FileChannel channel, Level level) throws IOException {
+	public static StreamHandler createLogFileHandler(File file, boolean lock, Level level) throws IOException {
+		if (!file.exists() && !file.getParentFile().mkdirs() && !file.createNewFile()) {
+			throw new IOException("Failed to create log file: " + file);
+		}
+
+		// open file channel and lock
+		FileChannel channel = FileChannel.open(file.toPath(), StandardOpenOption.CREATE, StandardOpenOption.WRITE, StandardOpenOption.APPEND);
+		if (lock) {
+			try {
+				channel.lock();
+			} catch (Exception e) {
+				throw new IOException("Failed to acquire lock: " + file, e);
+			}
+		}
+
 		StreamHandler handler = new StreamHandler(newOutputStream(channel), new ConsoleFormatter(anonymizePattern.get(), false));
 		handler.setEncoding("UTF-8");
 		handler.setLevel(level);

source/net/filebot/Main.java

@@ -14,8 +14,6 @@ import java.awt.Dialog.ModalityType;
 import java.io.File;
 import java.io.IOException;
 import java.net.URL;
-import java.nio.channels.FileChannel;
-import java.nio.file.StandardOpenOption;
 import java.security.CodeSource;
 import java.security.Permission;
 import java.security.PermissionCollection;
@@ -392,28 +390,12 @@ public class Main {
 			}
 		}
 
-		// tee stdout and stderr to log file if set
+		// tee stdout and stderr to log file if --log-file is set
 		if (args.logFile != null) {
-			File logFile = new File(args.logFile);
-			if (!logFile.isAbsolute()) {
-				logFile = new File(ApplicationFolder.AppData.resolve("logs"), logFile.getPath()).getAbsoluteFile(); // by default resolve relative paths against {applicationFolder}/logs/{logFile}
-			}
-			if (!logFile.exists() && !logFile.getParentFile().mkdirs() && !logFile.createNewFile()) {
-				throw new IOException("Failed to create log file: " + logFile);
-			}
-
-			// open file channel and lock
-			FileChannel logChannel = FileChannel.open(logFile.toPath(), StandardOpenOption.CREATE, StandardOpenOption.WRITE, StandardOpenOption.APPEND);
 			if (args.logLock) {
-				try {
+				log.config("Locking " + log);
-					log.config("Locking " + logFile);
-					logChannel.lock();
-				} catch (Exception e) {
-					throw new IOException("Failed to acquire lock: " + logFile, e);
-				}
 			}
-
+			Handler logFileHandler = createLogFileHandler(args.getLogFile(), args.logLock, Level.ALL);
-			Handler logFileHandler = createLogFileHandler(logChannel, Level.ALL);
 			log.addHandler(logFileHandler);
 			debug.addHandler(logFileHandler);
 		}

source/net/filebot/cli/ArgumentBean.java

@@ -26,6 +26,7 @@ import org.kohsuke.args4j.Option;
 import org.kohsuke.args4j.ParserProperties;
 import org.kohsuke.args4j.spi.ExplicitBooleanOptionHandler;
 
+import net.filebot.ApplicationFolder;
 import net.filebot.Language;
 import net.filebot.StandardRenameAction;
 import net.filebot.WebServices;
@@ -263,6 +264,17 @@ public class ArgumentBean {
 		return optional(lang).map(Language::findLanguage).orElseThrow(error("Illegal language code", lang));
 	}
 
+	public File getLogFile() {
+		File file = new File(logFile);
+
+		if (file.isAbsolute()) {
+			return file;
+		}
+
+		// by default resolve relative paths against {applicationFolder}/logs/{logFile}
+		return ApplicationFolder.AppData.resolve("logs/" + logFile);
+	}
+
 	public boolean isStrict() {
 		return !nonStrict;
 	}