trackNumber should return empty string if a track has no trackNumber encoded in its metadata

[porg]

Reproduction

• In /Volumes/iTunesFS/AlbumsTrackFormat.txt
  • I tried %(playlistNumber#000) %(artist) - %(album) - %(trackNumber#00) %(name).%(ext.lowercaseString)
  • and later %(playlistNumber#000) %(artist) - %(album) - %(trackNumber) %(name).%(ext.lowercaseString)
• Actual: In both configurations tracks without a track number produce "0".
• Expected: A track not having a track number should produce an empty string.
• Or we could introduce trackNumberNull="" and you can leave this empty or define any custom format you like in the absence of a trackNumber, like "xx" or "•".

[znek]

All relevant numbers are ordinals which start at 1 (not 0), hence 0 can always be considered as not being set and will now be discarded when being formatted. Fixed in [74ad41d].

[porg]

Great!
Could you make this available as a new build so that I can test it out?
I would then report the results of my testing here.

[znek]

iTunesFS-2.0.1.dmg

[porg]

Tested 2.0.1

• Works: If no track number exists it outputs NULL.

But I just detected a followup issue

/Volumes/iTunesFS/PlaylistsTrackFormat.txt
%(artist) - %(album) - %(trackNumber#00) %(name).%(ext.lowercaseString)

/Volumes/iTunesFS/Playlists/Sample Playlist

• 2raumwohnung - Kommt Zusammen - 01 Kommt zusammen.mp3

• 2raumwohnung - Kommt Zusammen - 02 Du und Ich.mp3

  • ✅ as long as artist album and trackNumber exist it works fine.

• Euji Acha Obnixophineles.mp3

• sco Definition.mp3

  • If the trackNumber does not exist it is omitted.
  • But also the separator/freetext between is gone.
  • Artist and Songname succeed directly without any separator

• What I rather wanted in those cases was:
  👉 Euji Acha - Obnixophineles.mp3
  👉 sco - Definition.mp3

Followup

• We could solve this problems and more with Formatter gets syntax support for if-exists-tag, if-exists-bracket, if-else-bracket #7.