What are some advanced techniques for GitHub Actions?

What are some advanced techniques for GitHub Actions?

Advanced GitHub Actions techniques include using composite actions, matrix builds, and caching dependencies. Would you like to know more about any specific technique?

Can you explain how to set up matrix builds?

Sure! Matrix builds allow you to run tests across multiple environments. You define a matrix in your workflow YAML file, specifying the different configurations you want to test.

What does the YAML configuration look like for a matrix build?

Here's a simple example:

jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        node-version: [10, 12, 14]
    steps:
      - uses: actions/setup-node@v2
        with:
          node-version: ${{ matrix.node-version }}
      - run: npm install
      - run: npm test

How can I cache dependencies in GitHub Actions?

You can cache dependencies using the actions/cache action. You specify the paths to cache and a key to identify the cache.