[Meson] Meson appending extra machine files

[franramirez688]

Changelog: Feature: Add tools.meson.mesontoolchain:extra_machine_files=["FILENAMES"] to Meson build helper to append machine files to the the ones created by Conan.
Docs: conan-io/docs#2831
Closes: #11961

[franramirez688]

No python2x anymore

[memsharded]

I am not convinced that the user story is injecting some meson files to all meson projects, or the users are missing a "local" way to inject those files inside package recipes, but like a different file for each project. I don't know enough about Meson usage and patterns, but we need to think about it.

[memsharded]

The definition of compilers might be "standardized" by Conan in its own configuration (or handle env-var CC CXX for everyone), so maybe not a good example

[eli-schwartz]

From a documentation perspective, what is a meson "user filename"? Shouldn't this use a name more evocative of the fact that Meson calls them native machine files?

[lasote]

From a documentation perspective, what is a meson "user filename"? Shouldn't this use a name more evocative of the fact that Meson calls them native machine files?

But there are native and cross files, right? Maybe something like tools.meson.mesontoolchain:additional_machine_files ?

[franramirez688]

I am not convinced that the user story is injecting some meson files to all meson projects, or the users are missing a "local" way to inject those files inside package recipes, but like a different file for each project. I don't know enough about Meson usage and patterns, but we need to think about it.

I've changed the configuration name to tools.meson.mesontoolchain:extra_machine_files so I think it's more evident than before. In my opinion, the user story is if you want to add your own variables from any section to the existing Conan ones, so we don't need to add more public attributes to the MesonToolchain class interface to manage all the machine file sections.

[franramirez688]

From a documentation perspective, what is a meson "user filename"? Shouldn't this use a name more evocative of the fact that Meson calls them native machine files?

Changed to tools.meson.mesontoolchain:extra_machine_files. I think it's clear enough, doesn't it?