[Qbs] Rule with merging of inputs tuples (pairs)

[Denis Shienkov]

Many thanks, it works.

2017-10-11 12:18 GMT+03:00 Christian Kandeler <Christian.Kandeler at qt.io>:

> Your problem is not mainly the output file path, but that you need to
> create the mapping first, because qbs cannot know about it.
> As for the concrete solution, the first thing to understand is that you
> need to create a multiplex rule:
> Rule {
>     multiplex: true
>
> This is because otherwise, the rule would be invoked per input artifact,
> but you need to see several inputs at once.
>
> Then, derive the output file paths:
>
>     outputArtifacts: {
>         var list = [];
>         // Iterate over one of inputs["a_binary"] or inputs["b_binary"] and
>        // add the tuple { <derived file path>, "c_binary" } to list.
>        return list;
>     }
>
> Finally, in the prepare script, you create tuples { <input1>, <input2>,
> <output> } of matching artifacts from all the inputs and outputs and create
> one copy command per such tuple.
>
> As you can see, there is a bit of "manual labor" involved, because qbs has
> no information about which two input artifacts belong together.
>
>
> Christian
>
> ________________________________________
> From: Denis Shienkov <denis.shienkov at gmail.com>
> Sent: Wednesday, October 11, 2017 10:38 AM
> To: qbs at qt-project.org; Christian Kandeler; Jake Petroules
> Subject: Rule with merging of inputs tuples (pairs)
>
> Hi all,
>
> is it possible to do something this?
>
> I have following set of files as inputs:
>
> 1) a1.bin, a2.bin, a3.bin, ..., aN.bin
> 2) b1.bin, b2.bin, b3.bin, ..., bN.bin
>
> I need to do some processing for this files to have on outputs
> like:
>
> c1.bin = a1.bin + b1.bin
> c2.bin = a2.bin + b2.bin
> c3.bin = a3.bin + b3.bin
> ...
> cN.bin = aN.bin + bN.bin
>
> A numbers of input A and B files are equal,
> so, a number of output C files should be too equal.
>
> The processing it is an usual 'copy' command, like:
>
> copy /b aN.bin + bN.bin cN.bin
>
> I have created a Rule:
>
> Rule {
>
>         inputs: ["a_binary", "b_binary"]
>
>
>         Artifact {
>
>             fileTags: ["c_binary"]
>
>             filePath: "c.bin";
>
>         }
>
>
>         prepare: {
>
>                     // Do something to call the
>                     // copy /b aN.bin + bN.bin cN.bin command.
>
>         }
>
>     }
>
> but is is unclear how to define an output artifact's file pach, because it
> should be different
> for each input, e.g. should be c1.bin, c2.bin and so on.?
>
> Or, maybe it is better solution, and I'm wrong?
>
> BR,
> Denis
>
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>
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