yarn_install.yml

description: Install Javascript dependencies using Yarn. This command correctly configures the cache for any number of package.json and yarn.lock files.

parameters:
  cache:
    description: Save and restore the build cache? Defaults to true
    type: boolean
    default: true
  cache_folder:
    description: The path to the yarn cache folder.  Defaults to /tmp/yarn
    type: string
    default: "/tmp/yarn"

steps:
  - when:
      condition: <<parameters.cache>>
      steps:
        - run:
            name: Create cache checksum file
            command: |
              mkdir -p ~/.tmp/checksumfiles
              find . -type f -name 'package.json' -not -path "*node_modules*" -exec cat {} + >> ~/.tmp/checksumfiles/package.json
              find . -type f -name 'yarn.lock' -not -path "*node_modules*" -exec cat {} + >> ~/.tmp/checksumfiles/yarn.lock
        - restore_cache:
            keys:
              - yarn-cache-{{ arch }}-{{ checksum "~/.tmp/checksumfiles/package.json" }}-{{ checksum "~/.tmp/checksumfiles/yarn.lock" }}-{{ .Environment.CACHE_VERSION }}
  - run:
      name: Yarn Install
      command: "yarn install --frozen-lockfile --non-interactive --cache-folder <<parameters.cache_folder>>"
  - when:
      condition: <<parameters.cache>>
      steps:
        - save_cache:
            paths:
              - <<parameters.cache_folder>>
              - node_modules
            key: |
              yarn-cache-{{ arch }}-{{ checksum "~/.tmp/checksumfiles/package.json" }}-{{ checksum "~/.tmp/checksumfiles/yarn.lock" }}-{{ .Environment.CACHE_VERSION }}