22 export class Logger {  class
23   private static instance: Logger | undefined;
37   public static getInstance(projectConfig?: BuildConfig): Logger {
38     if (!Logger.instance) {
42       Logger.instance = new Logger(projectConfig);
44     return Logger.instance;
48     Logger.instance = undefined;
52     const logger: ILogger = this.getLoggerFromSubsystemCode(subsystemCode);  constant
53     logger.printInfo(message);
57     const logger: ILogger = this.getLoggerFromSubsystemCode(subsystemCode);  constant
58     logger.printWarn(message);
62     const logger: ILogger = this.getLoggerFromSubsystemCode(subsystemCode);  constant
63     logger.printDebug(message);
68     const logger: ILogger = this.getLoggerFromErrorCode(error.code);  constant
69     logger.printError(error);
74     const logger: ILogger = this.getLoggerFromErrorCode(error.code);  constant
75     logger.printErrorAndExit(error);
87     const logger = this.getLoggerFromSubsystemCode(subsystemCode);  constant
88     return logger;