Module submission - libmusicbrainz

[Auke Kok]

Jannis Pohlmann wrote:
> On Sun, 16 Apr 2006 19:55:38 +0200
> "Davide \"M3xican\" Coppola" <dmc at dev-labs.net> wrote:
> 
>> Auke Kok wrote:
>>>> A last question, modules files doesn't support conditional
>>>> dependencies, isn't it? 
>>> it does, the function is called "optional_depends" instead of
>>> "depends". 
>> Yes, I have used the optional_depends function, but it's not what I
>> meant. I mean something like:
>>
>> if(IsInstalled(packageA))
>> do this...
>> else
>> ....
>>
>> we could use a feature like this to have a code like:
>>
>> if(IsInstalled(python))
>>     "ctypes is a dependence"
>> else
>>     "suggest ctypes as optiona dependence"
>>
>> And optional_depends doesn't seem to offer this stuff, isn't it?
> 
> Well, optional_depends sets the default answer to "y" if the
> dependency is already installed, so you just have to press <ENTER>.
> 
> Another idea would be to create a CONFIGURE file for the module and
> check the output of "lvu installed $MODULE", but that's rather messy
> and should not be used, as far as I understood.

using `lvu` inside modules is also not allowed. Please use the internal 
functions of needed:

if module_installed $SOMETHING ; then

also, this is technically OK, but be reminded that you cannot add dependencies 
in CONFIGURE - you can use it to configure a module only.

Auke