[Linux] Solve issues with paths containing upper-case letters

WeiDU automatically lower-cases all paths on Linux.
Using relative paths where possible reduces the chance of dealing with upper-case path names.

src/main/java/io/infinitytools/wit/gui/MainWindow.java

@@ -2443,16 +2443,20 @@ private void executeGuided() throws IllegalArgumentException, IndexOutOfBoundsEx
       }
     }
 
-    final String[] command = getWeiduCommand(gameLang, tp2File);
+    final String[] command = getWeiduCommand(gameLang, tp2File, workingDir);
 
     final SysProc sp = new SysProc(workingDir, true, command);
     runProcess(sp);
   }
 
   /**
    * Assembles the WeiDU command line for a guided mod installation.
+   *
+   * @param gameLang   Mod language index.
+   * @param tp2File    Full path of the tp2 file.
+   * @param workingDir Working directory for the WeiDU call.
    */
-  private String[] getWeiduCommand(String gameLang, Path tp2File) {
+  private String[] getWeiduCommand(String gameLang, Path tp2File, Path workingDir) {
     final List<String> command = new ArrayList<>(Configuration.getInstance().getWeiduArgs());
 
     // custom WeiDU options
@@ -2491,7 +2495,11 @@ private String[] getWeiduCommand(String gameLang, Path tp2File) {
 
     // standard options
     if (!command.contains("--log")) {
-      final Path logFile = getEffectiveLogFilePath(true);
+      Path logFile = getEffectiveLogFilePath(true);
+      // creating relative log file path (recommended on Linux to work around issues with upper case paths)
+      if (workingDir != null) {
+        logFile = workingDir.relativize(logFile);
+      }
       command.add(0, logFile.toString());
       command.add(0, "--log");
     }

src/main/java/io/infinitytools/wit/weidu/Weidu.java

@@ -287,8 +287,11 @@ public String[] getModLanguages(Path tp2File) throws FileNotFoundException {
       throw new FileNotFoundException("File does not exist: " + tp2File);
     }
 
-    final byte[] data = ProcessUtils.getProcessOutput(getWorkingDir(tp2File), weidu.toString(), "--nogame",
-        "--list-languages", tp2File.toString());
+    final Path workingDir = getWorkingDir(tp2File);
+    // creating relative tp2 file path (recommended on Linux to work around issues with upper case paths)
+    final Path tp2FileRelative = workingDir.relativize(tp2File);
+    final byte[] data = ProcessUtils.getProcessOutput(workingDir, weidu.toString(), "--nogame",
+        "--list-languages", tp2FileRelative.toString());
     final String output = BufferConvert.decodeBytes(data).decoded();
 
     return parseLanguages(output);
@@ -316,8 +319,11 @@ public JSONArray getModComponentInfo(Path tp2File, int language, Charset... char
     }
 
     // Getting mod info data as raw byte data and determine best character encoding based on selected language
-    final byte[] outputData = ProcessUtils.getProcessOutput(getWorkingDir(tp2File), weidu.toString(), "--nogame",
-        "--list-components-json", tp2File.toString(), Integer.toString(language));
+    final Path workingDir = getWorkingDir(tp2File);
+    // creating relative tp2 file path (recommended on Linux to work around issues with upper case paths)
+    final Path tp2FileRelative = workingDir.relativize(tp2File);
+    final byte[] outputData = ProcessUtils.getProcessOutput(workingDir, weidu.toString(), "--nogame",
+        "--list-components-json", tp2FileRelative.toString(), Integer.toString(language));
     Logger.debug("Parsing mod component JSON data (buffer={} bytes)", outputData.length);
 
     // preparing list of potential character sets