Add log on disk

CHANGELOG.md

@@ -13,6 +13,7 @@ Note that this project **does not** adhere to [Semantic Versioning](http://semve
 
 - We added a fetcher for [Biodiversity Heritage Library)](https://www.biodiversitylibrary.org/) [8539](https://github.com/JabRef/jabref/issues/8539)
 - We added support for multiple messages in the snackbar. [#7340](https://github.com/JabRef/jabref/issues/7340)
+- JabRef now writes log files. Linux: `$home/.cache/jabref/logs/version`, Windows: `%APPDATA%\..\Local\harawata\jabref\version\logs`, Mac: `Users/.../Library/Logs/jabref/version`
 
 ### Changed
 

src/main/java/org/jabref/gui/JabRefMain.java

@@ -7,6 +7,7 @@
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.Comparator;
+import java.util.Map;
 
 import javafx.application.Application;
 import javafx.application.Platform;
@@ -26,15 +27,18 @@
 import org.jabref.logic.protectedterms.ProtectedTermsLoader;
 import org.jabref.logic.remote.RemotePreferences;
 import org.jabref.logic.remote.client.RemoteClient;
+import org.jabref.logic.util.BuildInfo;
 import org.jabref.migrations.PreferencesMigrations;
 import org.jabref.model.database.BibDatabaseContext;
 import org.jabref.model.database.BibDatabaseMode;
 import org.jabref.preferences.JabRefPreferences;
 import org.jabref.preferences.PreferencesService;
 
+import net.harawata.appdirs.AppDirsFactory;
 import org.apache.commons.cli.ParseException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.tinylog.configuration.Configuration;
 
 /**
  * JabRef's main class to process command line options and to start the UI
@@ -45,10 +49,34 @@ public class JabRefMain extends Application {
     private static String[] arguments;
 
     public static void main(String[] args) {
+        addLogToDisk();
         arguments = args;
         launch(arguments);
     }
 
+    /**
+     * This needs to be called as early as possible. After the first log write, it is not possible to alter
+     * the log configuration programmatically anymore.
+     */
+    private static void addLogToDisk() {
+        Path directory = Path.of(AppDirsFactory.getInstance().getUserLogDir(
+                                     "jabref",
+                                     new BuildInfo().version.toString(),
+                                     "org.jabref"));
+        try {
+            Files.createDirectories(directory);
+        } catch (IOException e) {
+            LOGGER.error("Could not create log directory {}", directory, e);
+            return;
+        }
+        Map<String, String> configuration = Map.of(
+                "writerFile", "rolling file",
+                "writerFile.level", "info",
+                "writerFile.file", directory.resolve("log_{count}.txt").toString(),
+                "writerFile.latest", directory.resolve("latest.txt").toString());
+        Configuration.replace(configuration);
+    }
+
     @Override
     public void start(Stage mainStage) {
         try {

src/main/resources/tinylog.properties

@@ -2,3 +2,5 @@ level = info
 writer = gui
 writer1 = console
 writer2 = application insights
+
+exception = strip: jdk.internal