DollhouseMCP

name: 'Validate YAML'
description: 'Validates YAML syntax for modified workflow files'
branding:
  icon: 'check-circle'
  color: 'green'

runs:
  using: 'composite'
  steps:
    - name: Install yamllint
      shell: bash
      run: |
        if ! command -v yamllint &> /dev/null; then
          echo "Installing yamllint..."
          pip3 install yamllint || {
            echo "⚠️ Could not install yamllint, falling back to basic YAML validation"
            export YAMLLINT_AVAILABLE=false
          }
        else
          echo "yamllint already available"
        fi
        echo "YAMLLINT_AVAILABLE=${YAMLLINT_AVAILABLE:-true}" >> $GITHUB_ENV

    - name: Validate Workflow YAML
      shell: bash
      run: |
        # Robust git command with multiple fallbacks for edge cases
        echo "Detecting modified workflow files..."
        changed_workflows=$(
          git diff --name-only HEAD~1 HEAD -- .github/workflows/ 2>/dev/null || \
          git diff --name-only --cached -- .github/workflows/ 2>/dev/null || \
          git ls-files .github/workflows/ 2>/dev/null || \
          echo ""
        )
        
        if [ -n "$changed_workflows" ]; then
          echo "Validating modified workflow files..."
          validation_failed=false
          
          for file in $changed_workflows; do
            if [ -f "$file" ]; then
              echo "Validating $file..."
              
              # Basic YAML syntax validation
              python3 -c "import yaml; yaml.safe_load(open('$file'))" || {
                echo "❌ YAML syntax error in $file"
                validation_failed=true
                continue
              }
              
              # Enhanced validation with yamllint (if available)
              if [ "$YAMLLINT_AVAILABLE" = "true" ] && command -v yamllint &> /dev/null; then
                yamllint "$file" || {
                  echo "⚠️ YAML style issues in $file (non-blocking)"
                  # Don't fail on style issues, just warn
                }
              fi
              
              echo "✅ $file is valid YAML"
            fi
          done
          
          if [ "$validation_failed" = "true" ]; then
            echo "❌ YAML validation failed for one or more files"
            exit 1
          fi
        else
          echo "No workflow files modified, skipping validation"
        fi