晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 sh-3ll

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sh-3ll 1.0
DIR:/proc/self/root/lib/node_modules/npm/lib/utils/
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Current File : //proc/self/root/lib/node_modules/npm/lib/utils/read-user-info.js
'use strict'
const Bluebird = require('bluebird')
const readAsync = Bluebird.promisify(require('read'))
const userValidate = require('npm-user-validate')
const log = require('npmlog')

exports.otp = readOTP
exports.password = readPassword
exports.username = readUsername
exports.email = readEmail

function read (opts) {
  return Bluebird.try(() => {
    log.clearProgress()
    return readAsync(opts)
  }).finally(() => {
    log.showProgress()
  })
}

function readOTP (msg, otp, isRetry) {
  if (!msg) {
    msg = [
      'This command requires a one-time password (OTP) from your authenticator app.',
      'Enter one below. You can also pass one on the command line by appending --otp=123456.',
      'For more information, see:',
      'https://docs.npmjs.com/getting-started/using-two-factor-authentication',
      'Enter OTP: '
    ].join('\n')
  }
  if (isRetry && otp && /^[\d ]+$|^[A-Fa-f0-9]{64,64}$/.test(otp)) return otp.replace(/\s+/g, '')

  return read({prompt: msg, default: otp || ''})
    .then((otp) => readOTP(msg, otp, true))
}

function readPassword (msg, password, isRetry) {
  if (!msg) msg = 'npm password: '
  if (isRetry && password) return password

  return read({prompt: msg, silent: true, default: password || ''})
    .then((password) => readPassword(msg, password, true))
}

function readUsername (msg, username, opts, isRetry) {
  if (!msg) msg = 'npm username: '
  if (isRetry && username) {
    const error = userValidate.username(username)
    if (error) {
      opts.log && opts.log.warn(error.message)
    } else {
      return Promise.resolve(username.trim())
    }
  }

  return read({prompt: msg, default: username || ''})
    .then((username) => readUsername(msg, username, opts, true))
}

function readEmail (msg, email, opts, isRetry) {
  if (!msg) msg = 'email (this IS public): '
  if (isRetry && email) {
    const error = userValidate.email(email)
    if (error) {
      opts.log && opts.log.warn(error.message)
    } else {
      return email.trim()
    }
  }

  return read({prompt: msg, default: email || ''})
    .then((username) => readEmail(msg, username, opts, true))
}