Re: mutually exclusive group of options

Gyozo Papp wrote:
>> >   scan --dir2  ...
>> >   scan --dir1 -dir2 ...
>> >
>> > The common in both examples is that --init is omitted.
>>
>> and again, putting --dir1 and --dir2 in the same group of init should be
>> enough, shouldn't it?  This way, if you provide --dir1, --dir2 or even
>> --init, you cannot provide any --attach's group options...
> 
> IN this --dir1 and --dir2 will be mutually exclusive along with --init
> and --attach, won't be?
> This is not exactly what I want.
> 
>> did I get the point?
> Maybe but I'm afraid I'm getting lost. ;)
> 

Actually, I'm the one that got lost, sorry :-)
I thought that groups options were not mutually exclusive among them (I 
didn't implement that feature personally in first place, and actually 
never used that, so I never remember correctly how they work :-)
I actually remembered that if you specified an option of a group you 
couldn't specify an option of another group, but that's not right.
Instead, if you specify an option of one group and another option of 
another group is allowed.

So the only solution is to make --init and --attach belong to the same 
group (so that they're exclusive with each other), and then use dependon 
for all the other options.

Unfortunately, this requires --init to be specified explicitly (which is 
not what you want...).

Do you have any proposals of a new mechanism to solve this?

Of course, one could perform checks manually, but one would want most of 
the checks to be performed automatically, right? :-)

hope to hear from you soon
cheers
	Lorenzo

-- 
Lorenzo Bettini, PhD in Computer Science, DSI, Univ. di Firenze
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