yarn – Terrabuild

yarn

Provides build/test helpers for projects using yarn and a package.json. Defaults outputs to dist/** and infers dependencies from package.json to link Terrabuild graphs.

Available Commands

Command	Description
test	Runs the `test` script via `yarn test`.
run	Runs an arbitrary yarn script (`yarn <command>`).
install	Installs packages with `yarn install`, optionally updating the lockfile or ignoring engines.
build	Runs the `build` script via `yarn build`.
<command>	Runs an arbitrary yarn command (Terrabuild action name is forwarded to `yarn`).

Project Initializer

Infers project metadata from package.json (dependencies and default outputs).

project {
  @yarn { }
}

Equivalent to:

project {
    ignores = [ "node_modules/**" ]
    outputs = [ "dist/**" ]
}

Last updated on November 30, 2025