Re: [Boost-build] Reporting include paths for a project

Subject: Re: [Boost-build] Reporting include paths for a project
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2013-12-05 20:06:00

AMDG

On 11/15/2013 01:50 AM, Mateusz Loskot wrote:
> 
> That could serve as a little prosthesis for a solution I'm looking for.
> 
> I don't want to actually build, just inspect some build setup.
> So, I'd have to do sort of a dry-run, I guess, with:
> 
> b2 -d2 -n
> 
> However, I'd have to implement compiler-specific parsing, meaning,
> I'd have to do the job Boost.Build already does, doesn't it?
> 
> Alternative solution is to create Jamfile parser on my own,
> but that's scary overkill that would repeat the job already done.
> 
> Shortly, if Boost.Build knows what to pass to compiler, why it couldn't
> echo it out in an easily consumable form.
> 

The biggest problem with that is what should it echo?
There's a lot of information, and what's convenient
for your use case isn't necessarily what anyone else
needs.

What you can do is write a Jamfile that prints
out this information.  You can get access to
the virtual-target level infrastructure using
the generate rule.  (There's some documentation
here: http://www.boost.org/boost-build2/doc/html/bbv2/builtins/raw.html)
Anyway, you'll want to use virtual-target.traverse
to iterate over all targets.

It would look something like this (untested):

import virtual-target ;

rule print-all-includes ( project name : property-set : sources * )
{
    local result ;
    for local s in $(sources)
    {
        for local t in [ virtual-target.traverse $(s) ]
        {
            if [ $(t).action ]
            {
                local action = [ $(t).action ] ;
                local properties = [ $(action).properties ] ;
                result += [ $(properties).get <include> ] ;
            }
        }
    }
    for local include-path in [ set.unique $(result) ]
    {
        ECHO $(include-path) ;
    }
    return $(sources) ;
}

generate print-includes : path/to/your/project/ : @print-all-includes ;

In Christ,
Steven Watanabe