How do I set up matrix builds in GitHub Actions?

How do I set up matrix builds in GitHub Actions?

To set up matrix builds in GitHub Actions, you can define a matrix strategy in your workflow YAML file. This allows you to run tests across multiple environments.

Can you show me an example of the YAML configuration?

Sure! Here's a simple example:

name: CI
on: [push, pull_request]
jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        node-version: [10, 12, 14]
    steps:
      - uses: actions/checkout@v2
      - name: Set up Node.js
        uses: actions/setup-node@v2
        with:
          node-version: ${{ matrix.node-version }}
      - run: npm install
      - run: npm test

What does the matrix.node-version do?

The matrix.node-version variable allows you to specify different Node.js versions for each build. This way, you can ensure your code works across multiple versions.

Can I add more parameters to the matrix?

Yes, you can add more parameters by including additional keys in the matrix section. For example, you can add different operating systems or other configurations.