How to cache yarn packages in GitHub Actions

问题

I am using GitHub Actions to build my TypeScript project. Everytime I run action I am waiting 3 minutes for all dependencies to get installed.

Is there way to cache yarn dependencies, so build time will be faster?

I tried this:

     - name: Get yarn cache directory path
       id: yarn-cache-dir-path
       run: echo "::set-output name=dir::$(yarn cache dir)"

     - uses: actions/cache@v1
       id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
       with:
         path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
         key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
         restore-keys: |
           ${{ runner.os }}-yarn-

    - name: Install yarn
      run: npm install -g yarn

    - name: Install project dependencies
      run: yarn

but build time is still same.

回答1:

As mentioned in the comment next to the id field for the caching step:

Use this to check for cache-hit (steps.yarn-cache.outputs.cache-hit != 'true')

You're missing a conditional if property that determines whether the step should be run:

- name: Install yarn
  run: npm install -g yarn

- name: Install project dependencies
  if: steps.yarn-cache.outputs.cache-hit != 'true' # Over here!
  run: yarn

P.S. You should probably use the Setup NodeJS GitHub Action that additionally sets up Yarn for you:

- uses: actions/setup-node@v1
  with:
    node-version: '10.x' # The version spec of the version to use.

See the action.yml file for a full list of valid inputs.

EDIT: As it turns out, Yarn is included in the list of software installed on the GitHub-hosted Ubuntu 18.04.4 LTS (ubuntu-latest/ubuntu-18.04) runner, so there's no need to include a step to globally install Yarn.

回答2:

     - name: Get yarn cache directory path
       id: yarn-cache-dir-path
       run: echo "::set-output name=dir::$(yarn cache dir)"

     - uses: actions/cache@v1
       id: yarn-cache # use this to check for `cache-hit` (`steps.yarn-cache.outputs.cache-hit != 'true'`)
       with:
         path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
         key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
         restore-keys: |
           ${{ runner.os }}-yarn-

The caching code above only caches and restores the yarn cache directory, it doesn't cache the node_modules directory. So if you use this code (@Edric's answer),

- name: Install project dependencies
  if: steps.yarn-cache.outputs.cache-hit != 'true' # Over here!
  run: yarn

node_modules is not created and you will receive dependencies not found errors.

Instead, you can use this:

- name: Install project dependencies
  run: yarn --prefer-offline

This tells yarn to always run but use cached downloads (in the cache directory mentioned above) whenever possible instead of downloading from the server.

Even better, you can also the node_modules directory directly and skip the installation step when the cache is available. Example:

    - name: Get yarn cache directory path
      id: yarn-cache-dir-path
      run: echo "::set-output name=dir::$(yarn cache dir)"
    - name: Cache yarn cache
      uses: actions/cache@v2
      id: cache-yarn-cache
      with:
        path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
        key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}
        restore-keys: |
          ${{ runner.os }}-yarn-
    - name: Cache node_modules
      id: cache-node-modules
      uses: actions/cache@v2
      with:
        path: node_modules
        key: ${{ runner.os }}-${{ matrix.node-version }}-nodemodules-${{ hashFiles('**/yarn.lock') }}
        restore-keys: |
          ${{ runner.os }}-${{ matrix.node-version }}-nodemodules-
    - run: yarn
      if: |
        steps.cache-yarn-cache.outputs.cache-hit != 'true' ||
        steps.cache-node-modules.outputs.cache-hit != 'true'

回答3:

This is a 1-liner cache specifically for Yarn: https://github.com/c-hive/gha-yarn-cache

- uses: actions/checkout@v2
- name: Setup Node.js
  uses: actions/setup-node@v1
  with:
    node-version: 12.x

- uses: c-hive/gha-yarn-cache@v1

- name: Install JS dependencies
  run: yarn install

- name: Test
  run: yarn test

来源：https://stackoverflow.com/questions/61010294/how-to-cache-yarn-packages-in-github-actions

标签

typescript

yarnpkg

github-actions