incorrect -a flag in busybox tar (creation mode)?

[David Demelier]

Le 24/07/2019 à 09:22, David Demelier a écrit :
> Hello,
> 
> I've discovered that busybox tar -a flag acts differently than both 
> bsdtar and GNU tar. If the archive ends with extension .txz it creates a 
> LZMA file rather than xz.
>

I've realized that -a in busybox tar is not for auto-compress like 
GNU/bsdtar even though busybox's tar is based on libarchive (like bsdtar).

Since busybox tar performs auto-detection when reading/extracting, is 
there a chance that we change '-a' to perform like bsdtar/GNU tar for 
convenience even in creation mode?

Regards,

-- 
David