Eppo Multiplatform: SDKs and Artifacts to support Flagging and Experimentation

Eppo is a modular flagging and experimentation analysis tool. Eppo's SDKs are built to make assignments in multi-user server-side and client-side contexts. Before proceeding you'll need an Eppo account.

Features

• Feature gates
• Kill switches
• Progressive rollouts
• A/B/n experiments
• Mutually exclusive experiments (Layers)
• Dynamic configuration
• Global holdouts
• Contextual multi-armed bandits

Contributing

Preparing your environment

1. Install rustup.
2. Install Ruby using your preferred package manager.

Release process

To release a new version of SDK:

1. Make sure that version strings have been updated:
   • Eppo core: eppo_core/Cargo.toml
   • Rust: rust-sdk/Cargo.toml
   • Python: python-sdk/Cargo.toml
   • Ruby: ruby-sdk/lib/eppo_client/version.rb and ruby-sdk/ext/eppo_client/Cargo.toml
2. If SDK depends on a new version of eppo_core, the core should be released first.
3. Create a new release in GitHub interface.
   • For tag, use one of the following formats (choose "create new tag on publish"):
     • eppo_core@x.y.z
     • rust-sdk@x.y.z
     • python-sdk@x.y.z
     • ruby-sdk@x.y.z
   • For generating release notes, select previous tag from the same SDK (e.g., when releasing python-sdk@4.0.3, the previous tag should be python-sdk@4.0.2). Auto-generate release notes, prune entries that are not relevant for the SDK (e.g., Python SDK release should not list PRs for Ruby).
   • Publish release.
   • CI will automatically push a new release out to package registries.