Method ExtractExpressions

pkg/workflow/expression_extraction.go:140–174

ExtractExpressions extracts all ${{ ... }} expressions from the markdown content and creates environment variable mappings for each unique expression.

(markdown string)

// ExtractExpressions extracts all ${{ ... }} expressions from the markdown content
// and creates environment variable mappings for each unique expression.
func (e *ExpressionExtractor) ExtractExpressions(markdown string) ([]*ExpressionMapping, error) {
	expressionExtractionLog.Printf("Extracting expressions from markdown: content_length=%d", len(markdown))

	matches := ExpressionPattern.FindAllStringSubmatch(markdown, -1)
	expressionExtractionLog.Printf("Found %d expression matches", len(matches))

	for _, match := range matches {
		if len(match) < 2 {
			continue
		}
		e.processMatch(match[0], match[1])
	}

	// Convert map to sorted slice for consistent ordering
	var result []*ExpressionMapping
	for _, mapping := range e.mappings {
		result = append(result, mapping)
	}

	// Sort by original expression for deterministic output
	slices.SortFunc(result, func(a, b *ExpressionMapping) int {
		switch {
		case a.Original < b.Original:
			return -1
		case a.Original > b.Original:
			return 1
		default:
			return 0
		}
	})

	expressionExtractionLog.Printf("Extracted %d unique expressions", len(result))

	return result, nil
}

// transformActivationOutputs transforms needs.activation.outputs.* expressions to steps.sanitized.outputs.*
// for backward compatibility with existing workflows.