Skip inclusion of gems in the development/test groups about rails-nix HOT 4 CLOSED

AFAICT It should already be including only the "default" group:

• https://github.com/NixOS/nixpkgs/blob/5c4d9d0e50e7a9158a8ca976dea58d3ec95f9c56/pkgs/development/ruby-modules/bundler-env/default.nix#L11

Though I'm unsure about whether that is working like I expect it or not:

• rails-nix/gemset.nix

  Lines 165 to 175 in 4cf7917

  	capybara = {
  	dependencies = ["addressable" "matrix" "mini_mime" "nokogiri" "rack" "rack-test" "regexp_parser" "xpath"];
  	groups = ["test"];
  	platforms = [];
  	source = {
  	remotes = ["https://rubygems.org"];
  	sha256 = "1dv75hs45456mi76h720gxk959gpg4f6091hmk42y0ln6kp2x7i0";
  	type = "gem";
  	};
  	version = "3.36.0";
  	};

[nix-shell:~/.../rails-nix]$ find $(nix-build -A app.gems) -iname '*capybara*'
/nix/store/0hnxrd1i0vkha5ccnbhxxnkqqcclvfph-rails-nix-gems/lib/ruby/gems/2.7.0/specifications/capybara-3.36.0.gemspec
/nix/store/0hnxrd1i0vkha5ccnbhxxnkqqcclvfph-rails-nix-gems/lib/ruby/gems/2.7.0/gems/capybara-3.36.0

from rails-nix.

Given that forcing groups = ["default"] to the bundlerEnv call removes capybara from the gems output, I figure it's not working as I understand it.

from rails-nix.

This is because the default groups isn't used here:

• https://github.com/NixOS/nixpkgs/blob/5c4d9d0e50e7a9158a8ca976dea58d3ec95f9c56/pkgs/development/ruby-modules/bundler-env/default.nix#L41-L42
• https://github.com/NixOS/nixpkgs/blob/5c4d9d0e50e7a9158a8ca976dea58d3ec95f9c56/pkgs/development/ruby-modules/bundled-common/default.nix#L21

from rails-nix.

No PRs opened, as this might not be fixable on our end, and might require work on the Nixpkgs end to fix problems.

• https://github.com/fly-apps/rails-nix/commits/fix/8-gem-groups

See how there's a reverted commit to "fix" the image build, it's not sufficient as when running the same underlying issue surfaces. (And anyway felt like a bad fix.)

The issue, AFAIUI is that if we only install some gem groups, bundle for bundle exec is not aware of it, and will get annoyed.

Could not find debug-1.4.0, web-console-4.2.0, capybara-3.36.0, selenium-webdriver-4.1.0, webdrivers-5.0.0 in any of the sources
Run `bundle install` to install missing gems.

This might be fixed if the store path holding the Gemfile{,.lock} files had a .bundle/config with the config equivalent to running bundle config set --local without test development. Though this doesn't "scale" as a solution, we can't know what groups to add to BUNDLE_WITHOUT.

Note that we could handle it locally, but it would require somehow wrapping anything running in that environment to be wrapped with the BUNDLE_WITHOUT environment variable, which would need to list the remainder of allGroups - [ "default" ]. The latter part is doable with gemset.nix, but wrapping all with BUNDLE_WITHOUT is not a reliable solution.

The only reliable solution would be to get bundler to see its .bundle/config for the given gemset, which requires some work within Nixpkgs.

from rails-nix.