Re: [Qbs] How do I use Parameter property in a module itself?
> Is it true that all module properties should be allowed to be set per-file?
>
> Product {
> Depends { name: "mymodule"; }
> mymodule.useFeature: true // enable some probes here, do heavy checks
>
> Group { files: «file»; mymodule.useFeature: false; } // does nothing,
> all checks are already done
> }
>
> What worse, this won’t work at all:
>
> Product {
> Depends { name: "mymodule"; }
> Group { files: «file»; mymodule.useFeature: true; } // ooops
> }
>
This is how I understand the documentation:
Yes module properties can be specified on file level (in a group), but:
- probes are evaluated only once for each product and in product scope
- the probe would see the module properties set for a product
- the probe would not see module properties set for a group
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Re: [Qbs] How do I use Parameter property in a module itself?
However, this is an interesting question.
Is it true that all module properties should be allowed to be set per-file?
Product {
Depends { name: "mymodule"; }
mymodule.useFeature: true // enable some probes here, do heavy checks
Group { files: «file»; mymodule.useFeature: false; } // does nothing,
all checks are already done
}
What worse, this won’t work at all:
Product {
Depends { name: "mymodule"; }
Group { files: «file»; mymodule.useFeature: true; } // ooops
}
> 10 июня 2019 г., в 20:45, Иван Комиссаров написал(а):
>
> Yes, I’d like to have some syntax sugar here.
> But 2-liner is probably OK too.
>
>> 10 июня 2019 г., в 20:32, Richard Weickelt написал(а):
>>
>> Ivan,
>>
>> Do you actually want to achieve this?
>>
>> Module {
>> property bool useFeature: false
>>
>> Probes.BinaryProbe {
>> condition: useFeature
>> }
>> }
>>
>> Product {
>> Depends { name: "mymodule"; }
>> mymodule.useFeature: true
>> }
>>
>> The Parameter item, as far as I understand it, makes only sense if you have
>> - 2 products A and B
>> - B depends on A and on mymodule
>> - in the context of B you want to control, how a module "mymodule"
>> handles A
>>
>> You wouldn't use it to just parameterize "mymodule", because that can be
>> achieved with plain properties.
>>
>> The probably best explanation so far of the Parameter item can be found in
>> the following blog post:
>> https://blog.qt.io/blog/2017/09/05/qbs-1-9-released/ I realize that the
>> reference documentation of the Parameter item is insufficient and the
>> example in the module documentation could be more sensible.
>>
>> Richard
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Re: [Qbs] How do I use Parameter property in a module itself?
Yes, I’d like to have some syntax sugar here.
But 2-liner is probably OK too.
> 10 июня 2019 г., в 20:32, Richard Weickelt написал(а):
>
> Ivan,
>
> Do you actually want to achieve this?
>
>Module {
>property bool useFeature: false
>
>Probes.BinaryProbe {
>condition: useFeature
>}
>}
>
>Product {
>Depends { name: "mymodule"; }
>mymodule.useFeature: true
>}
>
> The Parameter item, as far as I understand it, makes only sense if you have
> - 2 products A and B
> - B depends on A and on mymodule
> - in the context of B you want to control, how a module "mymodule"
> handles A
>
> You wouldn't use it to just parameterize "mymodule", because that can be
> achieved with plain properties.
>
> The probably best explanation so far of the Parameter item can be found in
> the following blog post:
> https://blog.qt.io/blog/2017/09/05/qbs-1-9-released/ I realize that the
> reference documentation of the Parameter item is insufficient and the
> example in the module documentation could be more sensible.
>
> Richard
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[Qbs] How do I use Parameter property in a module itself?
I’d like to do something like this:
Module {
Parameter { property bool useFeature: false }
Probes.BinaryProbe {
condition: useFeature
}
}
So I’d be able to write:
Depends { name: "mymodule"; useFeature: true; }
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