Cache: Yarn cache - The template is not valid.

[binhxn]

Hello, I've tried to follow the Yarn example, but am running into issues restoring the cache between jobs.

Here's some example code:

jobs:
  install:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - name: Set up node 12
        uses: actions/setup-node@v1
        with:
          node-version: 12.x
      - name: Get Yarn Cache Directory
        id: yarn-cache
        run: |
          echo "::set-output name=dir::$(yarn cache dir)"
      - uses: actions/cache@v1
        with:
          path: ${{ steps.yarn-cache.outputs.dir }}
          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
          restore-keys: |
            ${{ runner.os }}-yarn-
      - name: Install dependencies
        run: yarn install

  build:
    needs: install
    runs-on: ubuntu-latest
    steps:
      - name: Use cache
        uses: actions/cache@v1
        with:
          path: ${{ steps.yarn-cache.outputs.dir }}
          key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
          restore-keys: |
            ${{ runner.os }}-yarn-
      - name: Bundle library
        run: yarn rollup

This is the output of the echo command from the install job:

shell: /bin/bash -e {0}

This is the output when attempting to restore/use the cache in the build job:

##[error]The template is not valid. hashFiles('/home/runner/work/my-library/my-library/**/yarn.lock') failed. Directory '/home/runner/work/my-library/my-library' is empty

It seems like setting up the cache is fine, but I'm not sure if the steps to restore the cache is correct in the build job.

• The yarn version is the same both on the machine and locally.
• If I re-run the workflow again from the beginning, it is successfully restoring cache in the install step, but fails in the build job with the results above:

Run actions/cache@v1
  with:
    path: /home/runner/.cache/yarn/v6
    key: Linux-yarn-41015f9cc5726fbdc66b81d2c0629ca1c83e0330cc716214b95e6e86fce51a56
    restore-keys: Linux-yarn-

Cache Size: ~154 MB (161229517 B)
/bin/tar -xz -f /home/runner/work/_temp/5ba7fc03-08f9-4747-9696-d1baa8806b49/cache.tgz -C /home/runner/.cache/yarn/v6
Cache restored from key: Linux-yarn-41015f9cc5726fbdc66b81d2c0629ca1c83e0330cc716214b95e6e86fce51a56

I feel like I'm missing something fairly simple, but can't pinpoint it exactly. Any help would be grateful.

[webjay]

try this:

  - name: Use cached Node modules
    uses: actions/cache@v1
    with:
      path: node_modules
      key: nodeModules-${{ hashFiles('**/yarn.lock') }}
      restore-keys: |
        nodeModules-

[webjay]

and make sure that runs-on is the same as what your yarn.lock was made on like macos-latest.

[binhxn]

@webjay That worked, thank you for your help!