install-yarn.yml

description: >
    Install a custom version of the Yarn package manager

parameters:
    version:
        type: string
        default: ''
        description: >
            Pick a version of Yarn to install (if no version is specified,
            the latest stable version will be installed):
            https://github.com/yarnpkg/yarn/releases

steps:
    - run:
          name: Install Yarn
          environment:
              NODE_PARAM_YARN_VERSION: <<parameters.version>>
          command: <<include(scripts/install-yarn.sh)>>