Fix for Sound error - #3

README.md

@@ -8,3 +8,20 @@ nextflow run doom
 
 > [!NOTE]
 > All credit for the Java implementation go to this project: https://github.com/gaborbata/vanilla-mocha-doom
+
+## Troubleshooting
+
+### Sound error: NullPointerException
+
+If you see an error like:
+
+```
+Cannot invoke "javax.sound.midi.Receiver.send(javax.sound.midi.MidiMessage, long)" because "receiver" is null
+```
+
+This occurs on systems without MIDI audio devices. Run with `--nomusic` to disable music only, or `--nosound` to disable all audio:
+
+```bash
+nextflow run doom --nomusic  # Disable music only
+nextflow run doom --nosound  # Disable all sound
+```

main.nf

@@ -1,5 +1,8 @@
 #!/usr/bin/env nextflow
 
+params.nomusic = false
+params.nosound = false
+
 process printLogo {
     output:
     stdout
@@ -71,8 +74,9 @@ process playDoom {
     val true
 
     script:
+    def soundFlags = params.nosound ? '-nosound' : (params.nomusic ? '-nomusic' : '')
     """
-    java -jar $projectDir/lib/mochadoom.jar -iwad $projectDir/doom1.wad
+    java -jar $projectDir/lib/mochadoom.jar -iwad $projectDir/doom1.wad $soundFlags
     """
 }