Introduce support for macOS CI/CD

[joshuakarp]

Tasks

Currently in the process of participating in the macOS Build Cloud Runners beta https://gitlab.com/gitlab-com/macos-buildcloud-runners-beta

Queries and responses:

Are we only able to have one project using the macOS Runner?

While we are not yet fully on the autoscaler, we are limiting access to one project. Once we transition then there will be no limit.

Can the CI/CD do a complete signed build for Mac App Store/iOS?

Yes this will work, however we need to document options for codesigning process in our initial documentation MR.
(Note from me: they provided instructions for how to set this up.)

[joshuakarp]

See also the following issue regarding Nix Build Pipelines with macOS: MatrixAI/TypeScript-Demo-Electron#10

[joshuakarp]

@tegefaulkes @CMCDragonkai as a reminder for the macOS Build Cloud Runners.

For js-polykey on GitLab:

Your macOS runner should now be available and should appear active in your Runner's list.

A very basic example to get you started:

tags: [ shared-macos-amd64 ]
image: macos-11-xcode-12 # https://docs.gitlab.com/ee/ci/runners/build_cloud/macos/environment.html
job:
  script:
    - echo "hello world"

[CMCDragonkai]

This is being done in #292. When that gets merged this issue can be closed.

So far only 1 project can this be applied to. This is the js-polykey project in: https://gitlab.com/MatrixAI/open-source/js-polykey.

Due to this issue: #5, we are going to be merging these 2 repos together. I think it will still work because the project allowed is filtered by a project ID or CI/CD ID right? So if we are just using js-polykey but just renaming the repo (including URL) it should all be fine.

[CMCDragonkai]

It seems like there's no 1 project limit mentioned in the README.md anymore. Perhaps we can ask for https://gitlab.com/MatrixAI/open-source/typescript-demo-lib as well?

[CMCDragonkai]

Added a new request for the other repos including our electron project: https://gitlab.com/gitlab-com/macos-buildcloud-runners-beta/-/issues/233