metro/packages/metro-bundler/Glossary.md

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Glossary
===
Terminology commonly used in React Native Packager / Metro Bundler is explained
here. This document is work in progress, please help completing it.
## Build Root
Configuration files (`rn-cli.config.js`) support configuring one or more roots
that are watched for file changes during development. In the context of the
integration with the `js_*` rule family in [Buck][], there is only a single root,
the build root used by Buck.
## Local Path
A *local path* / `localPath` is the path to a file relative to a
[*build root*](#build-root).
[Buck]: http://buckbuild.com/