- The blog post is outdated but still useful for S3-compatible distribution; Keygen now offers an official Rubygems engine.
- Keygen can be used to license and distribute private Ruby gems, similar to previous guides for Docker, Node packages, and Electron apps.
- The open-core licensing model (e.g., Sidekiq Pro) is a popular business model for commercial gems.
- Steps to build a Ruby gem: create directory structure, define class, create gemspec, build the gem using `gem build`.
- Generate a private gem source index using `gem generate_index` to produce required files (specs, quick spec, etc.).
- Publish the gem to Keygen using the Keygen CLI: set environment variables, create a release, upload artifacts (gem, index files, quick spec), then publish and tag the release.
- Install the gem by adding a Gemfile source with a license token in the URL (e.g., `https://license:TOKEN@api.keygen.sh/...`).
- The process can be automated with a Rakefile for easy publishing of new gem versions.