Isolate Ruby installation from system ruby version

[jcbhmr]

Ideally the fontist installation is self contained such that this:

- uses: ruby/setup-ruby@v1
  with:
    ruby-version: "ruby-3.0.0"
- uses: fontist/setup@v1
- run: ruby --version

would return the "ruby-3.0.0" version INSTEAD OF the version that "fontist/setup" installed globallyfor itself to use. That means somehow shoving Ruby and the fontist cli ruby files somewhere out of the main system path.

note that Ruby needs to know the dest path ahead of time (its somehow hardcoded in the binaries/config)

thoeretically this could be done with something like this:

curl -fsSL https://github.com/ruby/setup-ruby/releases/... idk some URL to download the .zip release archive
unzip setup-ruby-v1.2.3
export RUNNER_TOOL_CACHE=/my/custom/path
export GITHUB_PATH=/github-path.txt
export GITHUB_ENV=/github-env.txt
node setup-ruby-v1.2.3/dist/index.js

/my/custom/path/gem install fontist

# then somehow cache the /my/custom/path or whatever

maybe?

[jcbhmr]

i think this could also make it easier to do #1 ?

[jcbhmr]

I think @CAMOBAP is right that we can just rely on the system Ruby installation as "good enough" and just hope that nobody does ruby-version: ruby-2 on https://github.com/ruby/setup-ruby lol

#1 (comment)