Function DetectJREByEnv

src/java/jres/jre.go:199–215

Helper functions DetectJREByEnv checks environment variables for JRE selection Takes the internal JRE name (e.g., "sapmachine", "openjdk", "zulu") Checks both auto-generated and documented environment variable names This matches the behavior of GetJREVersion

(jreName string)

// Checks both auto-generated and documented environment variable names
// This matches the behavior of GetJREVersion
func DetectJREByEnv(jreName string) bool {
	// Check auto-generated name pattern (e.g., JBP_CONFIG_SAPMACHINE)
	envKey := fmt.Sprintf("JBP_CONFIG_%s", strings.ToUpper(strings.ReplaceAll(jreName, "-", "_")))
	if os.Getenv(envKey) != "" {
		return true
	}

	// Check documented environment variable name from map
	// This ensures backward compatibility with documented JBP_CONFIG_*_JRE convention
	if documentedEnvKey, exists := jreNameToDocumentedEnvVar[jreName]; exists {
		if os.Getenv(documentedEnvKey) != "" {
			return true
		}
	}

	return false
}

// jreNameToDocumentedEnvVar maps JRE names to their documented environment variable names
// This maintains backward compatibility with the documented JBP_CONFIG_*_JRE convention