Re: [Boost-build] Is it possible to find out if a named target exists in a subproject jamfile

Subject: Re: [Boost-build] Is it possible to find out if a named target exists in a subproject jamfile
From: Rene Rivera (grafikrobot_at_[hidden])
Date: 2015-04-03 15:25:34

On Fri, Apr 3, 2015 at 2:03 PM, Sherwood Hu <sherwood_at_[hidden]> wrote:

>  Hi all,
>
>
>
> I have a project with a dozen sub-projects, with a jamroot under the root
> and jamfile under each sub-project.
>
>
>
> Most sub-projects have a “stage” target which copied the files to a
> location. But not all have this target. In order to run “stage” at the top,
> I have to define:
>
>
>
> alias stage  : sub1//stage sub2//stage … ;
>
>
>
> Is it possible to look into the jamfile of a subproject and put it into
> this alias programmatically?
>

You will likely have to get the latest BBv2 from develop branch for this to
work.. You can do something like this:

===
import project ;
local sub1-module = [ project.find sub1 : $(__file__:D) ] ;
local sub1-target = [ project.target $(sub1-module) ] ;
if [ $(sub1-target).has-alternative-for-target stage ]
{
    # "stage" is declared in project.. do something..
}
===

Obviously put in a loop and/or local rule to avoid copy/paste ;-)

HTH.

-- 
-- Rene Rivera
-- Grafik - Don't Assume Anything
-- Robot Dreams - http://robot-dreams.net
-- rrivera/acm.org (msn) - grafikrobot/aim,yahoo,skype,efnet,gmail