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:/opt/alt/alt-nodejs11/root/lib/node_modules/npm/lib/utils/
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Current File : //opt/alt/alt-nodejs11/root/lib/node_modules/npm/lib/utils/metrics.js
'use strict'
exports.start = startMetrics
exports.stop = stopMetrics
exports.save = saveMetrics
exports.send = sendMetrics

const fs = require('fs')
const path = require('path')
const npm = require('../npm.js')
const regFetch = require('libnpm/fetch')
const uuid = require('uuid')

let inMetrics = false

function startMetrics () {
  if (inMetrics) return
  // loaded on demand to avoid any recursive deps when `./metrics-launch` requires us.
  var metricsLaunch = require('./metrics-launch.js')
  npm.metricsProcess = metricsLaunch()
}

function stopMetrics () {
  if (inMetrics) return
  if (npm.metricsProcess) npm.metricsProcess.kill('SIGKILL')
}

function saveMetrics (itWorked) {
  if (inMetrics) return
  // If the metrics reporter hasn't managed to PUT yet then kill it so that it doesn't
  // step on our updating the anonymous-cli-metrics json
  stopMetrics()
  var metricsFile = path.join(npm.config.get('cache'), 'anonymous-cli-metrics.json')
  var metrics
  try {
    metrics = JSON.parse(fs.readFileSync(metricsFile))
    metrics.metrics.to = new Date().toISOString()
    if (itWorked) {
      ++metrics.metrics.successfulInstalls
    } else {
      ++metrics.metrics.failedInstalls
    }
  } catch (ex) {
    metrics = {
      metricId: uuid.v4(),
      metrics: {
        from: new Date().toISOString(),
        to: new Date().toISOString(),
        successfulInstalls: itWorked ? 1 : 0,
        failedInstalls: itWorked ? 0 : 1
      }
    }
  }
  try {
    fs.writeFileSync(metricsFile, JSON.stringify(metrics))
  } catch (ex) {
    // we couldn't write the error metrics file, um, well, oh well.
  }
}

function sendMetrics (metricsFile, metricsRegistry) {
  inMetrics = true
  var cliMetrics = JSON.parse(fs.readFileSync(metricsFile))
  regFetch(
    `/-/npm/anon-metrics/v1/${encodeURIComponent(cliMetrics.metricId)}`,
    // NOTE: skip npmConfig() to prevent auth
    {
      registry: metricsRegistry,
      method: 'PUT',
      body: cliMetrics.metrics,
      retry: false
    }
  ).then(() => {
    fs.unlinkSync(metricsFile)
  }, err => {
    fs.writeFileSync(path.join(path.dirname(metricsFile), 'last-send-metrics-error.txt'), err.stack)
  })
}