Method processMatch

pkg/workflow/expression_extraction.go:107–136

processMatch handles a single regex match from the expression extraction regex. It applies content transformations, emits any deprecation warnings, registers the primary mapping, and expands compound expressions into sub-expression mappings. It is a no-op for empty content or already-seen expression

(originalExpr, rawContent string)

// the primary mapping, and expands compound expressions into sub-expression
// mappings. It is a no-op for empty content or already-seen expressions.
func (e *ExpressionExtractor) processMatch(originalExpr, rawContent string) {
	content := strings.TrimSpace(rawContent)
	if content == "" {
		expressionExtractionLog.Printf("Skipping empty expression: %s", originalExpr)
		return
	}

	originalContent := content
	content = applyContentTransformers(content, defaultContentTransformers)

	// Skip if we've already seen this expression (also prevents duplicate deprecation warnings)
	if _, exists := e.mappings[originalExpr]; exists {
		return
	}

	// Emit deprecation warning once per unique deprecated activation-output expression
	if content != originalContent && strings.HasPrefix(content, "steps.sanitized.outputs.") {
		fmt.Fprintln(os.Stderr, console.FormatWarningMessage(
			fmt.Sprintf("Deprecated expression ${{ %s }}: use ${{ %s }} instead.", originalContent, content),
		))
	}

	e.mappings[originalExpr] = &ExpressionMapping{
		Original: originalExpr,
		EnvVar:   e.generateEnvVarName(content),
		Content:  content,
	}

	e.addSubExpressionMappings(content)
}

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