[Qbs] Qbs: how to use a pre-build script

[Timur Kristóf]

Hi Nikolai,

This does look very cool, I might use it in my project.

However, while it does solve the specific (and simplified) problem at
hand, it still doesn't really address the more general problem that I
was asking about.

Okay, for some git info, I can use a Probe and probably get away with
it.

But how can I do other pre-build stuff, like running a code generator
(flex, bison, etc. come to mind)?

Thanks,
Timur

On Fri, 2017-05-26 at 19:46 +0300, NIkolai Marchenko wrote:
> This is what you really need:
> 
> http://codepad.org/LVxUvSaF a probe
> http://codepad.org/14TUDCor utilitary javascript functions that probe
> references. Sorry for code quality ;)
>  
> This probe attaches to a HEAD file to make sure params are
> regenerated each time it changes.
> used in actual project as:
> import "../../GitProbe.qbs" as GitProbe
> .... later in product....
> GitProbe {
>     id: gitProbe
>     sourceDirectory: project.sourceDirectory
> }
> 
> cpp.defines:{
>     var result =base.concat([
>                        "GIT_VERSION=" + "\"" + gitProbe.hash + "\"",
>                        "GIT_TAG=" + "\"" + gitProbe.tag + "\"",
>                        "GIT_COMMIT_DATE=" + "\"" +
> gitProbe.commitdate + "\"",
>                   ])
> 
>     return result
> }
> 
> and then use these defines directly in code without any generated
> header.
> 
> 
> 
> On Fri, May 26, 2017 at 7:17 PM, Timur Kristóf <timur.kristof at gmail.c
> om> wrote:
> > Hi,
> > 
> > What is the correct way to execute a pre-build script with Qbs
> > whose
> > output is a dependency to the product being built?
> > 
> > For example, I have a script that generates a C++ header file
> > containing the current git revision and the date of the build. This
> > header is then included into one of the C++ source files of the
> > product. How do I execute this script before compiling the product?
> > 
> > I could try to create a Rule item, but I'm not sure how to make
> > sure
> > that the rule is executed before the project is compiled. Or should
> > I
> > create a separate Product and make the main Product depend on that?
> > 
> > Thanks in advance!
> > Cheers,
> > Timur
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> > Qbs at qt-project.org
> > http://lists.qt-project.org/mailman/listinfo/qbs
> > 
> 
>