[WIP] Update install documentation for Brew

[aveksler1]

I updated the installation documentation for Brew.
It was previously "coming soon...", so I updated it to reflect the brew dependency installation as outlined in the macos.yml file used in github workflows.
Users are then pointed to install using CMake.

Here is a preview of the docs:

[ax3l]

Hi @aveksler1, thanks a lot for the PR!

The docs for dependencies for from-source install are linked here: https://warpx.readthedocs.io/en/latest/install/dependencies.html#brew-macos-linux

What I envisioned for the doc you currently updated is a package like this:

• user-facing doc: https://openpmd-api.readthedocs.io/en/0.15.2/install/install.html#using-the-brew-package
• code details for the package in brew: https://github.com/openPMD/homebrew-openPMD

[aveksler1]

Ah sorry for misunderstanding. How much work do you think creating a homewbrew formula would be? If it's not a huge undertaking, I'd be interested in doing this, but otherwise I'll just close this.

[ax3l]

Hi @aveksler1,

since we can build WarpX now for all four dimensions at once, this should be easy :)

I started a new repo: https://github.com/ECP-WarpX/homebrew-blast

One can tap it via

brew update
brew tap ecp-warpx/blast

and after that install formulas of the kind:

brew install warpx

Take a look at https://github.com/openPMD/homebrew-openPMD/blob/master/Formula/openpmd-api.rb if you like and fill the Formula/warpx.rb accordingly with it?
I added a quick draft here: https://github.com/ECP-WarpX/homebrew-blast/blob/main/Formula/warpx.rb