Re: [Boost-build] How to invoke custom script from actions and relatedquestions

From: Kirill Lapshin (kir_at_[hidden])
Date: 2006-03-05 15:22:30

Daniel,

Thanks a bunch for your help. <implicit-dependency> did the trick.

Just for the record, the way I solved my first problem (calling custom 
script, using relative path, from actions) is:

in Jamroot:

path-constant SCRIPTS_DIR : scripts ;

import custom ;
custom.init $(SCRIPTS_DIR) ;

in custom.jam:

rule init ( scripts_dir )
{
     if $(.configured)
     {
         errors.error "Attempt to reconfigure custom.jam" ;
     }
     .configured = true ;

     .scripts_dir = $(scripts_dir) ;
}

[skip]

actions some_action
{
     $(.scripts_dir)/some_script $(<) $(>)
}

Daniel Einspanjer wrote:
> I'm still new to BBv2, but I think I can help point you the right way on 
> some of these questions:
> 
> 
> "Kirill Lapshin" <kir_at_[hidden]> wrote in message 
> news:du58sm$jbl$1_at_sea.gmane.org...
>> I thought ok, fine I'll use path-constant!
>>
>> Problem -- I defined path-constant in Jamroot, but it is not visible in
>> verbatim.jam.
>>
>> Fine, I'll hack my way for now and I moved all the code from
>> verbatim.jam to Jamroot. That one sort of fixed the problem, except that
>> build log looks a bit awkward (due to the fact that Jamroot's name
>> consists of full path to the file), but that's a hack anyways, no big 
>> deal.
>>
>> First question: what is the proper fix for this problem?
> 
> I'm sorry, I don't have a ready answer.  I know I've seen some testcases for 
> handling path constants in the boost-build/test directory, but I don't have 
> time tonight to dig them up.  If you don't have an answer, I'll try to find 
> it tomorrow.
> Just to make sure, you do know about making a rule with the same name as the 
> action to do BB logic (preparing variables and such) before the action 
> starts sending commands to the system, right?
> 
> 
>> Second question: will lib rule pick up dependency on generated.hpp and
>> realize that it has to regenerate it (if needed) before compiling 
>> util.cpp?
> 
> Just include this line to the requirements section of your lib util target.
> <implicit-dependency>generated.hpp
> 
> 
>> Third question: the whole setup currently does not work, because
>> generated.hpp gets created in build directory, but that said directory
>> is not added to includes when compiling util.cpp. What is the right way
>> to fix that?
> 
> Implicit-dependency will fix that problem too.
> 
> 
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