Multi ruby devcontainer setup

[solnic]

I struggled a lot when switching between rubies to test things out / fix specs etc. so I ended up with a devcontainer setup that allows me to easily switch to a specific ruby version in VS Code.

I figured I could share this here because it may turn out to be useful for others.

The reason why this is based on devcontainers is simple - we support too many rubies that have conflicting dependencies. I could not use rvm or any other Ruby version manager to easily switch between super old crubies or jruby.

Furthermore, I think we could have a nice setup with relay running as a docker service which can really help with figuring things out with envelopes etc.

#skip-changelog

[st0012]

I think this is an interesting idea. Can you also describe the process you use to switch between Rubies with this setup? I think it's probably worth documented in CONTRIBUTING.md?

[solnic]

I think this is an interesting idea. Can you also describe the process you use to switch between Rubies with this setup? I think it's probably worth documented in CONTRIBUTING.md?

@st0012 I updated the CONTRIBUTING file - would you mind checking out this branch and seeing if you can get up and running with the devcontainer?

[sl0thentr0py]

I don't use vscode but totally okay with merging in a better tooling experience.
I'll also try to see if I can use these without vscode.

[st0012]

Thanks for the instructions. Generally speaking it works but I have a few questions as a devcontainer noob:

1. You mentioned that the VS Code command is called Remote-Containers: Reopen in Container, but I did find it and ended up using this instead. I wonder what's causing the difference 🤔
   
2. How did you pull your local shell configs...etc. into the container? I currently don't see a way to do it and it makes the terminal in the container hard to use 😢
3. I noticed that the top-level folder is sentry instead of sentry-ruby, which fails some tests (see below). Do you want to update the config to use sentry-ruby as the root instead?
   

   sentry-ruby/sentry-ruby/spec/sentry/profiler_spec.rb

   Line 244 in f11a7aa

   expect(foo_frame[:abs_path]).to include('sentry-ruby/sentry-ruby/spec/sentry/profiler_spec.rb')

4. Ruby LSP doesn't run with the current setting as the container doesn't use any Ruby version manager and the devcontainer setting doesn't specify sufficient settings as an alternative. How do you make it work?