name: 'Check Changes'
description: 'Check if there are changes in specific directories'

outputs:
  backend_changed:
    description: 'Is backend changed?'
    value: ${{ steps.changes.outputs.backend_changed }}
  frontend_changed:
    description: 'Is frontend changed?'
    value: ${{ steps.changes.outputs.frontend_changed }}
  infrastructure_changed:
    description: 'Is infrastructure changed?'
    value: ${{ steps.changes.outputs.infrastructure_changed }}

runs:
  using: "composite"
  steps:
    - name: Checkout
      uses: actions/checkout@v3
      with: 
        fetch-depth: 2

    - name: Check for changes
      id: changes
      run: |
        backend_changed=false
        frontend_changed=false
        infrastructure_changed=false

        git diff --quiet HEAD^ HEAD backend/ || backend_changed=true
        git diff --quiet HEAD^ HEAD frontend/ || frontend_changed=true
        git diff --quiet HEAD^ HEAD infrastructure/ || infrastructure_changed=true

        echo "backend_changed=$backend_changed" >> $GITHUB_OUTPUT
        echo "frontend_changed=$frontend_changed" >> $GITHUB_OUTPUT
        echo "infrastructure_changed=$infrastructure_changed" >> $GITHUB_OUTPUT
      shell: bash