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							76 lines
						
					
					
						
							1.8 KiB
						
					
					
				
			
		
		
	
	
							76 lines
						
					
					
						
							1.8 KiB
						
					
					
				'use strict'
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const os = require('os')
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const writer = require('flush-write-stream')
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const split = require('split2')
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const { existsSync, statSync } = require('fs')
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const pid = process.pid
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const hostname = os.hostname()
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const isWin = process.platform === 'win32'
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function getPathToNull () {
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  return isWin ? '\\\\.\\NUL' : '/dev/null'
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}
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function once (emitter, name) {
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  return new Promise((resolve, reject) => {
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    if (name !== 'error') emitter.once('error', reject)
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    emitter.once(name, (...args) => {
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      emitter.removeListener('error', reject)
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      resolve(...args)
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    })
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  })
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}
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function sink (func) {
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  const result = split((data) => {
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    try {
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      return JSON.parse(data)
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    } catch (err) {
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      console.log(err)
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      console.log(data)
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    }
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  })
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  if (func) result.pipe(writer.obj(func))
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  return result
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}
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function check (is, chunk, level, msg) {
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  is(new Date(chunk.time) <= new Date(), true, 'time is greater than Date.now()')
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  delete chunk.time
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  is(chunk.pid, pid)
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  is(chunk.hostname, hostname)
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  is(chunk.level, level)
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  is(chunk.msg, msg)
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}
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function sleep (ms) {
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  return new Promise((resolve) => {
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    setTimeout(resolve, ms)
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  })
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}
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function watchFileCreated (filename) {
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  return new Promise((resolve, reject) => {
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    const TIMEOUT = 800
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    const INTERVAL = 100
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    const threshold = TIMEOUT / INTERVAL
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    let counter = 0
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    const interval = setInterval(() => {
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      // On some CI runs file is created but not filled
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      if (existsSync(filename) && statSync(filename).size !== 0) {
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        clearInterval(interval)
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        resolve()
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      } else if (counter <= threshold) {
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        counter++
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      } else {
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        clearInterval(interval)
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        reject(new Error(`${filename} was not created.`))
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      }
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    }, INTERVAL)
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  })
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}
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module.exports = { getPathToNull, sink, check, once, sleep, watchFileCreated }
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