Adds Meson

[dirmeier]

Meson is a modern build system for C, C++, D, Fortran, Java and Rust.

Also see issue #4365 and PR #4561

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I wanted to let you know that I linted all conda-recipes in your PR (recipes) and found some lint.

Here's what I've got...

For recipes:

• The "test" section was expected to be a dictionary, but got a CommentedSeq.
• The recipe must have some tests.
• The "test" section was expected to be a dictionary, but got a CommentedSeq.

[dirmeier]

@SoapZA

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipes) and found it was in an excellent condition.

[bgruening]

I guess we should use python -m pip install --no-deps --ignore-installed nowadays.

[dirmeier]

Sure I'll change that. What is the advantage of it? pip install goes through setup.py install, too and is more likely to crash if something is missing or am I wrong?

[bgruening]

See here: conda-forge/conda-forge.github.io#518

[bgruening]

@dirmeier very cool!

[dirmeier]

@bgruening Cool, thanks for the quick revision.

[bgruening]

I might be wrong here, but as this is a pure python package I think we should do it noarch.

[SoapZA]

correct, Meson is pure python
I would maybe consider adding ninja as a run-time dependency, in order not to pull it in for every meson-dependent package.

[dirmeier]

@bgruening Dear Björn, can you help me out here please? Not sure how to fix this.
Similar issue: conda/conda-build#2575

[bgruening]

Thanks for trying the noarch package.

[jakirkham]

In the future, please create a directory called meson (or whatever the package name is) and place your recipe in there. Fixing this with PR ( #5379 ).