call script from Portfile?

[Titus von Boxberg]

Am 01.09.2010 um 08:29 schrieb Ryan Schmidt:

> 
> On Sep 1, 2010, at 01:09, Titus von Boxberg wrote:
> 
>> Is there a phase when both the port is activated and the build directory
>> is still in place? Is there a thing like post-activation ?
> 
> Yes, you can write a post-activate phase. But that's not the correct place to do the type of fix you're proposing. The correct place is probably the post-build phase. You can look at the oracle-instantclient for a (convoluted) example of calling install_name_tool in a portfile (it does it in the build phase, but you probably have an existing build phase you don't want to overwrite, so you probably want post-build instead).
> 
Just to refresh the thread:
The original question was if and when to call an external script that calls install_name_tool
which is necessary for wxWidgets-devel.

I figured that it would be easiest to define a post-install phase.
Then the already existing script from wxWidgets can be called without modifications.
That cannot be done in the post-build phase. In this phase I would have to patch
the script or handcraft the call of install_name_tool like in oracle-instantclient
which imo would only clutter the Portfile if there is a oneliner at hand.

Is there a variable that defines the installation directory for the port?
I.e. the path ${prefix}/var/macports/software/.../${prefix}?
Or maybe only the ... component? Or at least a variable holding all variants?

And why would the post-activate phase not be the correct place to call change_install_name?
Is a port ever used before activation?

Regards
Titus