replHistory.js

let fs = require('fs')
module.exports = function (repl, file) {

  try {
    fs.statSync(file)
    repl.history = fs.readFileSync(file, 'utf-8').split('\n').reverse()
    repl.history.shift()
    repl.historyIndex = -1 // will be incremented before pop
  // eslint-disable-next-line no-empty
  } catch (e) { }

  let fd = fs.openSync(file, 'a')
  let wstream = fs.createWriteStream(file, {
    fd: fd
  })
  wstream.on('error', function (err) {
    throw err
  })

  repl.addListener('line', function (code) {
    if (code && code !== '.history') {
      wstream.write(code + '\n')
    } else {
      repl.historyIndex++
      repl.history.pop()
    }
  })

  process.on('exit', function () {
    fs.closeSync(fd)
  })

  repl.commands['history'] = {
    help: 'Show the history',
    action: function () {
      let out = []
      repl.history.forEach(function (v) {
        out.push(v)
      })
      repl.outputStream.write(out.reverse().join('\n') + '\n')
      repl.displayPrompt()
    }
  }
}