Re: [Boost-build] [boost] [test] How to execute shell commands

Subject: Re: [Boost-build] [boost] [test] How to execute shell commands
From: Jürgen Hunold (jhunold_at_[hidden])
Date: 2018-10-17 15:48:32

Hi Mike,

first thing is that you got the wrong mailing list  and the wrong [library] 
tag. This really is a Boost.Build question and belongs on its mailing list. So 
I crossposted your question there.

And as this is not a Boost.Test question, [test] is also misleading. 

Beyond that, I can at least answer how to get the current Jamfile directory, 
see below. 

Am Mittwoch, 17. Oktober 2018, 12:34:42 CEST schrieb Mike Dev via Boost:
> OK, what I got from the documentation is that I can do something like
> 
> notfile run_cmake_self_test : @echo ;
> actions echo
> {
>     mkdir __build__
>     cd __build__
>     cmake ..
>     cmake --build .
> }
> 
> but
> 1) this will create __build__ in whatever directory b2 is called from and
>    require the test cmake file to be in the parent directory of the current
> 2) mkdir will fail if the directory already esists and the flags necessary
>    to circumvent that are different on powershell (--force) and bash (-p)
> 
> To fix 1) I'd need a way to get the current build directory (that is where
> I want to create the __build__ directory) and the director of the current
> jam file (which is where the CMakeLists.txt file resides).

In the current Jamfile you can use 

path-constant CWD : . ;

to store the current directory "." into a variable named CWD. Or whatever name 
you like.

> That would result in something like this:
> 
> notfile run_cmake_self_test : @echo ;
> actions echo
> {
>     mkdir $(b2-build-dir)/__build__
>     cd $(b2-build-dir)/__build__
>     cmake $(b2-source-dir)
>     cmake --build .
> }

I see what you want. 

> For 2 it would be nice, if b2 had a platform agnostic way to create a
> directory if it doesn't already exist so that I can just write
> 
> "<create $(b2-build-dir)/__build__ if neccesarry>"
> 
> notfile run_cmake_self_test : @echo ;
> actions echo
> {
>     cd $(b2-build-dir)/__build__
>     cmake $(b2-source-dir)
>     cmake --build .
> }
> 
> Could someone tell me how to achieve those two goals?

I hope someone with more active b2 knowledge can.

Yours,

Jürgen
-- 
* Dipl.-Math. Jürgen Hunold  ! 
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