Surgo / cache

Cache dependencies and build outputs in GitHub Actions

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This GitHub Action allows caching dependencies and build outputs to improve workflow execution time.

GitHub Actions status



Create a workflow .yml file in your repositories .github/workflows directory. An example workflow is available below. For more information, reference the GitHub Help Documentation for Creating a workflow file.


  • path - A directory to store and save the cache
  • key - An explicit key for restoring and saving the cache
  • restore-keys - An ordered list of keys to use for restoring the cache if no cache hit occurred for key


  • cache-hit - A boolean value to indicate an exact match was found for the key

See Skipping steps based on cache-hit for info on using this output

Example workflow

name: Example Caching with npm

on: push

    runs-on: ubuntu-latest
    - uses: actions/checkout@v1

    - name: Cache node modules
      uses: actions/cache@preview
        path: node_modules
        key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
        restore-keys: |
          ${{ runner.os }}-node-

    - name: Install Dependencies
      run: npm install
    - name: Build
      run: npm run build

    - name: Test
      run: npm run test

Ecosystem Examples

See Examples

Cache Limits

Individual caches are limited to 200MB and a repository can have up to 2GB of caches. Once the 2GB limit is reached, older caches will be evicted based on when the cache was last accessed. Caches that are not accessed within the last week will also be evicted.

Skipping steps based on cache-hit

Using the cache-hit output, subsequent steps (such as install or build) can be skipped when a cache hit occurs on the key.


  - uses: actions/checkout@v1

  - uses: actions/cache@preview
    id: cache
      path: path/to/dependencies
      key: ${{ runner.os }}-${{ hashFiles('**/lockfiles')}}
  - name: Install Dependencies
    if: steps.cache.outputs.cache-hit != 'true'
    run: /

Note: The id defined in actions/cache must match the id in the if statement (i.e. steps.[ID].outputs.cache-hit)


We would love for you to contribute to @actions/cache, pull requests are welcome! Please see the for more information.


The scripts and documentation in this project are released under the MIT License


Cache dependencies and build outputs in GitHub Actions

License:MIT License


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