Question

Explain about matrix strategy with a reusable workflow in Github Actions?

Answer 1

Jobs using the matrix strategy can call a reusable workflow.

A matrix strategy lets you use variables in a single job definition to automatically create multiple job runs that are based on the combinations of the variables. For example, you can use a matrix strategy to pass different inputs to a reusable workflow. 

This example job below calls a reusable workflow and references the matrix context by defining the variable target with the values [dev, stage, prod]. It will run three jobs, one for each value in the variable.

YAML

jobs:
  ReuseableMatrixJobForDeployment:
    strategy:
      matrix:
        target: [dev, stage, prod]
    uses: octocat/octo-repo/.github/workflows/deployment.yml@main
    with:
      target: ${{ matrix.target }}