[Qbs] QBS script parsing speed

[Карелин Павел]

I already use the second variant.
The maximum that I export this:
     Export {
         Depends { name: "cpp" }
         cpp.includePaths: product.exportIncludePaths
     }

But to connect files, I use wildcard mask almost everywhere. In topic 
"Improving qbs resolve performance" 
(https://lists.qt-project.org/pipermail/qbs/2019-July/002481.html) 
Christian Kandeler does not recommend doing this. But now I can’t do it 
differently - there are a lots of files, and I can’t connect them all 
individually.

--
BR, Pavel Karelin


30.06.2020 11:24, Jochen Ulrich пишет:
> We faced similar problems but our resolve times were even higher (30 s to 2 mins).
>
> We were able to work around this and significantly reduce the resolve times by avoiding transitive dependencies (meaning exporting dependencies).
>
> So instead of this:
>
> Product {
>      name: “A”
>      Depends { name: "B" }
> }
>
> Product {
>      name: “B”
>      Depends { name: "C" }
>      Export {
>          Depends { name: "C" }
>      }
> }
>
> Product {
>      name: “C”
>      Depends { name: "SomeLibNeededEverywhere" }
>      Export {
>          Depends { name: "SomeLibNeededEverywhere" }
>      }
> }
> <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
>
> You do it like this
>
> Product {
>      name: “A”
>      Depends { name: "B" }
>      Depends { name: "C" }
>      Depends { name: "SomeLibNeededEverywhere" }
> }
>
> Product {
>      name: “B”
>      Depends { name: "C" }
>      Depends { name: "SomeLibNeededEverywhere" }
> }
>
> Product {
>      name: “C”
>      Depends { name: "SomeLibNeededEverywhere" }
> }
> <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
>
> Of course it is ugly because you have to maintain the transitive dependencies manually.
> However, if you have cases where a dependency is needed in many places, you can create custom products that include it.
> For example:
> // qbs/imports/MyBaseApplication.qbs
> CppApplication {
>      Depends { name: "SomeLibNeededEverywhere" }
> }
>
> // in other .qbs files use MyBaseApplication instead of CppApplication
> MyBaseApplication {
> }
> <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
>
> See also this thread on the mailing list:
> https://lists.qt-project.org/pipermail/qbs/2019-July/002477.html
> and the follow up:
> https://lists.qt-project.org/pipermail/qbs/2019-August/002544.html
>
> Kind regards
> Jochen Ulrich
>
>> Von: Qbs <qbs-bounces at qt-project.org> im Auftrag von Карелин Павел <hkarel at yandex.ru>
>> Datum: Dienstag, 30. Juni 2020 um 09:45
>> An: "qbs at qt-project.org" <qbs at qt-project.org>
>> Betreff: [Qbs] QBS script parsing speed
>>
>> Hello.
>>
>> Now I'm trying to write a QBS build script for a fairly large project (QGIS). After making every change to the build script - the project tree is rebuilt and QtCreator freezes for 10-15 seconds.
>> It seems that 10-15 is not so much, but since I have to make a lot of changes in the script, in the aggregate the slowdown turns out to be quite significant.
>> I suppose I was not the only one who faced a similar problem on large projects. I would like to know if any measures are being planned to increase the speed of re-parsing a project?
>> I am using QtCreator 4.11.2 (QBS 1.15.1)
>>
>>
>> --
>> BR, Pavel Karelin

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