[flatbuffers] flatc build system is not reliable enough about mediasoup

[jmillan]

Is there anything I could try here? And perhaps @nazar-pc?

I'm trying to use meson custom_target to generate the flatbuffers header files out of the schemas. I've found an issue I've already reported.

I think this is the best way we can generate the headers, once it only generates them when the schemas change.

What is the problem with recompining it every time though?

That every change in a single .cpp file will incur in re-generating the flatbuffers header files and due to that, by the time of writing this, 141 .cpp files need to be recompiled.

I'll take care of the Rust side BTW.

👍

[nazar-pc]

In case of Rust version flatbufferes will be built by build script of mediasoup-sys, which will ensure compiled results are always up to date. It has ability to track file changes to avoid recompilation when files not change, so this will be TypeScript-specific.

[jmillan]

I've tried to create a Meson custom_target in order to build the C++ flatbuffers headers as part of the build process, which I expect would correctly do it just when the schemas change. I've already spent some time today without success.

NOTE: I'll continue in this direction. I'll investigate it later.

[ibc]

Is there anything I could try here? And perhaps @nazar-pc?

[nazar-pc]

What is the problem with recompining it every time though? I'll take care of the Rust side BTW.