A sample GitHub workflow using the GitHub ref to conditionally skip steps

ci-with-ref-check.yml

ci_web: 
  name: "Build & Tests & Lint"
  runs-on: ubuntu-latest

  steps: 
    - name: "Checkout project"
      uses: actions/checkout@v3

    - name: "Use Node.js"
      uses: actions/setup-node@v3
      with: 
        node-version-file: .node-version

    - name: "Install npm dependencies"
      run: "npm ci"

    - name: "Lint code"
      if: github.ref != 'refs/heads/main'
      run: "npm run lint"

...