Add pure ruby platform gem variant for rspec-trunk-flaky-tests

[dfrankland]

Summary

Adds a pure ruby platform gem variant so users with PLATFORMS ruby in their Gemfile.lock can resolve the dependency without manually adding every CI platform.

The ruby gem is a lightweight fallback — it contains only the Ruby lib files (no native extension, no Rust source, no rb_sys dependency). On supported platforms, bundler automatically prefers the precompiled native gem. If the ruby variant is loaded on a platform without a native gem, it raises a clear error:

Could not load the native extension for rspec_trunk_flaky_tests.

You are likely installing the pure ruby variant of this gem, which does not
include a precompiled native extension. To fix this, add your platform to
your Gemfile.lock:

    bundle lock --add-platform x86_64-linux    # Standard Linux
    ...

Why not compile from source?

The Rust native extension depends on monorepo-local path crates (context, test_report) that aren't available to end users, so source compilation would always fail.

Changes

• lib/rspec_trunk_flaky_tests.rb — Catch LoadError from missing native extension and raise a helpful message with platform instructions
• Rakefile — ruby_gem task builds a gem with no extensions, no native source, no rb_sys dep — just lib/**/*.rb
• release_ruby_gem.yml — Add ruby to the cross-gem matrix with conditional steps to build and validate the ruby variant
• Gemfile.lock — Add ruby to PLATFORMS

Test plan

• Validated locally: ruby gem has platform=ruby, no extensions, no .rs files, no rb_sys dep
• Validated locally: gem only contains lib/rspec_trunk_flaky_tests.rb and lib/trunk_spec_helper.rb
• CI: cross-gem matrix builds all 5 variants (4 native + ruby)
• CI: validation step confirms ruby gem structure
• Verify gem push publishes all variants

https://claude.ai/code/session_01NmPAFvW2QgLBjsocytoVLD

[trunk-io]

😎 Merged directly without going through the merge queue, as the queue was empty and the PR was up to date with the target branch - details.

[trunk-staging-io]

     

View Full Report ↗︎ ⋅ Docs

[jjb]

If the ruby variant is loaded on a platform without a native gem, it raises a clear error

"To fix this, add your platform to your Gemfile.lock"

Do these two contradict one another - won't the error only be raised if an install is happening on an unsupported platform, and in that case there is nothing the user can do?

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.96%. Comparing base (8d7ab32) to head (5fb5a62).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1060      +/-   ##
==========================================
+ Coverage   81.70%   81.96%   +0.26%     
==========================================
  Files          69       69              
  Lines       14878    14878              
==========================================
+ Hits        12156    12195      +39     
+ Misses       2722     2683      -39     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[dfrankland]

@jjb yeah, that was a bad message. I've updated to be more specific, and I'm happy to change it if there's something you think would make it clearer. Thanks for reviewing!

[trunk-io]

     

View Full Report ↗︎ ⋅ Docs

[TylerJang27]

LGTM. Next step is testing a beta release

[jjb]

🎉