complete -c haxefetch -f

complete -c haxefetch -s h -l help      -d 'Show help'
complete -c haxefetch -s v -l version   -d 'Show version of Haxefetch'
complete -c haxefetch -s c -l config    -d 'Generate new config of Haxefetch'
complete -c haxefetch -s t -l tutorial  -d 'Show how to customise Haxefetch'