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

[André Somers]

Op 26/05/2017 om 18:46 schreef NIkolai Marchenko:
> 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"asGitProbe
> .... later in product....
> GitProbe{
> id:gitProbe
> sourceDirectory:project.sourceDirectory
> }
> cpp.defines:{
> varresult=base.concat([
> "GIT_VERSION="+"\""+gitProbe.hash+"\"",
> "GIT_TAG="+"\""+gitProbe.tag+"\"",
> "GIT_COMMIT_DATE="+"\""+gitProbe.commitdate+"\"",
> ])
>
> returnresult
> }
> and then use these defines directly in code without any generated header.
>
Does that actually rebuild the files where these variables are used when
building? If not, then it is a bit useless.

André

>
> On Fri, May 26, 2017 at 7:17 PM, Timur Kristóf
> <timur.kristof at gmail.com <mailto:timur.kristof at gmail.com>> 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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