yvm.yml

name: yvm
on: pull_request
jobs:
    yvm:
        runs-on: ubuntu-latest
        # When you set the yarn version via `policies set-version`, it will download
        # that version of yarn into a `.yarn` folder at the root of your project. To
        # save from downloading a specific version of yarn every time, we'll cache it
        # and resue it instead. If it detects a new version of yarn, then it will
        # download and save it for later.
        steps:
            - name: Checkout repo
              uses: actions/checkout@v2
            - name: Cache yarn version
              id: yarn-cache
              uses: actions/cache@v2
              with:
                  path: '**/.yarn'
                  key: yarn-cache-${{ hashFiles('**/.yvmrc') }}
            - name: Read yarn version
              id: yvm
              if: steps.yarn-cache.outputs.cache-hit != 'true'
              run: echo "::set-output name=version::$(cat .yvmrc)"
            - name: Set yarn version
              if: steps.yarn-cache.outputs.cache-hit != 'true'
              run: yarn policies set-version ${{ steps.yvm.outputs.version }}