reusable_detect-terraform-changes.yaml

name: 'Detect Terraform Changes'

on:
  workflow_call:
    outputs:
      environments:
        description: "JSON array of changed environments"
        value: ${{ jobs.detect-changes.outputs.environments }}
      has_changes:
        description: "Whether any changes were detected"
        value: ${{ jobs.detect-changes.outputs.has_changes }}

jobs:
  detect-changes:
    name: 'Detect Changed Environments'
    runs-on: ubuntu-latest
    outputs:
      environments: ${{ steps.detect.outputs.environments }}
      has_changes: ${{ steps.detect.outputs.has_changes }}
    
    steps:
    - name: 'Checkout Repository'
      uses: actions/checkout@v5.0.0
      with:
        fetch-depth: 0

    - name: 'Detect Changed Environments'
      id: detect
      run: |
        if [ "${{ github.event_name }}" == "pull_request" ]; then
          changed_files=$(git diff --name-only ${{ github.event.pull_request.base.sha }} ${{ github.sha }})
        else
          if [ "${{ github.event.before }}" == "0000000000000000000000000000000000000000" ]; then
            changed_files=$(git diff --name-only origin/main...${{ github.sha }})
          else
            # Normalny push - porównaj z poprzednim commitem
            changed_files=$(git diff --name-only ${{ github.event.before }} ${{ github.sha }})
          fi
        fi
        
        echo "Changed files:"
        echo "$changed_files"
        
        environments=()
        
        for file in $changed_files; do
          if [[ $file == terraform/environments/* ]]; then
            env_name=$(echo $file | cut -d'/' -f3)
            if [[ ! " ${environments[@]} " =~ " ${env_name} " ]]; then
              environments+=("$env_name")
            fi
          fi
        done
        
        if echo "$changed_files" | grep -q "terraform/modules/"; then
          echo "Modules changed, checking all environments..."
          for env_dir in terraform/environments/*/; do
            env_name=$(basename "$env_dir")
            if [[ ! " ${environments[@]} " =~ " ${env_name} " ]]; then
              environments+=("$env_name")
            fi
          done
        fi
        
        if [ ${#environments[@]} -eq 0 ]; then
          echo "environments=[]" >> $GITHUB_OUTPUT
          echo "has_changes=false" >> $GITHUB_OUTPUT
          echo "No environments detected"
        else
          json_array=$(printf '%s\n' "${environments[@]}" | jq -R . | jq -s -c .)
          echo "environments=$json_array" >> $GITHUB_OUTPUT
          echo "has_changes=true" >> $GITHUB_OUTPUT
          echo "Detected environments: ${environments[*]}"
        fi