scripts/parse-log.ts

   1 import * as program from 'commander'
   2 import { createReadStream, readdirSync, statSync } from 'fs'
   3 import { join } from 'path'
   4 import { createInterface } from 'readline'
   5 import * as winston from 'winston'
   6 import { labelFormatter } from '../server/helpers/logger'
   7 import { CONFIG } from '../server/initializers/constants'
   8
   9 program
  10   .option('-l, --level [level]', 'Level log (debug/info/warn/error)')
  11   .parse(process.argv)
  12
  13 const excludedKeys = {
  14   level: true,
  15   message: true,
  16   splat: true,
  17   timestamp: true,
  18   label: true
  19 }
  20 function keysExcluder (key, value) {
  21   return excludedKeys[key] === true ? undefined : value
  22 }
  23
  24 const loggerFormat = winston.format.printf((info) => {
  25   let additionalInfos = JSON.stringify(info, keysExcluder, 2)
  26   if (additionalInfos === '{}') additionalInfos = ''
  27   else additionalInfos = ' ' + additionalInfos
  28
  29   return `[${info.label}] ${toTimeFormat(info.timestamp)} ${info.level}: ${info.message}${additionalInfos}`
  30 })
  31
  32 const logger = winston.createLogger({
  33   transports: [
  34     new winston.transports.Console({
  35       level: program['level'] || 'debug',
  36       stderrLevels: [],
  37       format: winston.format.combine(
  38         winston.format.splat(),
  39         labelFormatter,
  40         winston.format.colorize(),
  41         loggerFormat
  42       )
  43     })
  44   ],
  45   exitOnError: true
  46 })
  47
  48 const logLevels = {
  49   error: logger.error.bind(logger),
  50   warn: logger.warn.bind(logger),
  51   info: logger.info.bind(logger),
  52   debug: logger.debug.bind(logger)
  53 }
  54
  55 const logFiles = readdirSync(CONFIG.STORAGE.LOG_DIR)
  56 const lastLogFile = getNewestFile(logFiles, CONFIG.STORAGE.LOG_DIR)
  57
  58 const path = join(CONFIG.STORAGE.LOG_DIR, lastLogFile)
  59 console.log('Opening %s.', path)
  60
  61 const rl = createInterface({
  62   input: createReadStream(path)
  63 })
  64
  65 rl.on('line', line => {
  66   const log = JSON.parse(line)
  67   // Don't know why but loggerFormat does not remove splat key
  68   Object.assign(log, { splat: undefined })
  69
  70   logLevels[log.level](log)
  71 })
  72
  73 function toTimeFormat (time: string) {
  74   const timestamp = Date.parse(time)
  75
  76   if (isNaN(timestamp) === true) return 'Unknown date'
  77
  78   return new Date(timestamp).toISOString()
  79 }
  80
  81 // Thanks: https://stackoverflow.com/a/37014317
  82 function getNewestFile (files: string[], basePath: string) {
  83   const out = []
  84
  85   files.forEach(file => {
  86     const stats = statSync(basePath + '/' + file)
  87     if (stats.isFile()) out.push({ file, mtime: stats.mtime.getTime() })
  88   })
  89
  90   out.sort((a, b) => b.mtime - a.mtime)
  91
  92   return (out.length > 0) ? out[ 0 ].file : ''
  93 }