expo/eas-cli

`@expo/build-tools` is the core library for the EAS Build service. It implements the build process for React Native projects and for managed Expo applications.

`@expo/eas-build-job` contains types and Joi schemas for job objects. It's used in `eas-cli` to create the job object and on EAS Build workers (and in `eas-cli-local-build-plugin`) to process the job and run the build.

`@expo/template-file` provides file-level variable substitution (Mustache template style).

`@expo/downloader` is a small helper library used to download files.

`@expo/logger` is a wrapper around `bunyan` library.