Add -v flag to enable debug logging

src/eachwatt.ts

@@ -8,7 +8,7 @@ import { httpRequestHandler } from './http/server'
 import { WebSocketPublisherImpl } from './publisher/websocket'
 import { PublisherType } from './publisher'
 import { pollCharacteristicsSensors } from './characteristics'
-import { createLogger } from './logger'
+import { createLogger, LogLevel, setLogLevel } from './logger'
 import { setRequestTimeout as setHttpRequestTimeout } from './http/client'
 import { setRequestTimeout as setModbusRequestTimeout } from './modbus/client'
 import { applyFilters } from './filter/filter'
@@ -26,10 +26,18 @@ const argv = yargs(process.argv.slice(2))
       demandOption: true,
       alias: 'c',
     },
+    'verbose': {
+      description: 'Enable verbose logging',
+      alias: 'v',
+    },
   })
   .parseSync()
 
 const logger = createLogger('main')
+if (argv.verbose) {
+  logger.info('Setting log level to DEBUG')
+  setLogLevel(LogLevel.DEBUG)
+}
 
 const mainPollerFunc = async (config: Config) => {
   const now = Date.now()

src/logger.ts

@@ -1,6 +1,9 @@
 import winston, { Logger } from 'winston'
 
-const DEFAULT_LOG_LEVEL = 'info'
+export enum LogLevel {
+  INFO = 'info',
+  DEBUG = 'debug',
+}
 
 // Define log transports here, so we can change the log level later
 const transports = [new winston.transports.Console()]
@@ -9,14 +12,13 @@ const logFormat = winston.format.printf(({ level, message, label, timestamp }) =
   return `${timestamp} [${label}] ${level}: ${message}`
 })
 
-// export const setLogLevel = (logger: Logger, level: string) => {
-//   logger.info(`Setting log level to ${level}`)
-//   transports[0].level = level
-// }
+export const setLogLevel = (level: LogLevel) => {
+  transports[0].level = level
+}
 
 export const createLogger = (module: string): Logger => {
   return winston.createLogger({
-    'level': DEFAULT_LOG_LEVEL,
+    'level': LogLevel.INFO,
     'format': winston.format.combine(winston.format.label({ label: module }), winston.format.timestamp(), logFormat),
     'transports': transports,
   })