When a program has no sub-commands, its root command can accept
arguments. If we add the default "completion" command to such programs
they will now have a sub-command and will no longer accept arguments.
What we do instead for this special case, is only add the "completion"
command if it is being called, or if it is being completed itself.
We want to have the "completion" command for such programs because it
will allow the completion of flags and of arguments (if provided
by the program).
Signed-off-by: Marc Khouzam <marc.khouzam@gmail.com>
The code has also been refactored to use a type alias for completion and a completion helper
Using a type alias is a non-breaking change and it makes the code more readable and easier to understand.
Signed-off-by: ccoVeille <3875889+ccoVeille@users.noreply.github.com>
Co-authored-by: Marc Khouzam <marc.khouzam@gmail.com>
