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/proc/self/root/opt/alt/alt-nodejs22/root/lib/node_modules/npm/node_modules/@npmcli/agent/lib/dns.js

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'use strict'

const { LRUCache } = require('lru-cache')
const dns = require('dns')

// this is a factory so that each request can have its own opts (i.e. ttl)
// while still sharing the cache across all requests
const cache = new LRUCache({ max: 50 })

const getOptions = ({
  family = 0,
  hints = dns.ADDRCONFIG,
  all = false,
  verbatim = undefined,
  ttl = 5 * 60 * 1000,
  lookup = dns.lookup,
}) => ({
  // hints and lookup are returned since both are top level properties to (net|tls).connect
  hints,
  lookup: (hostname, ...args) => {
    const callback = args.pop() // callback is always last arg
    const lookupOptions = args[0] ?? {}

const options = {
      family,
      hints,
      all,
      verbatim,
      ...(typeof lookupOptions === 'number' ? { family: lookupOptions } : lookupOptions),
    }

const key = JSON.stringify({ hostname, ...options })

if (cache.has(key)) {
      const cached = cache.get(key)
      return process.nextTick(callback, null, ...cached)
    }

lookup(hostname, options, (err, ...result) => {
      if (err) {
        return callback(err)
      }

cache.set(key, result, { ttl })
      return callback(null, ...result)
    })
  },
})

module.exports = {
  cache,
  getOptions,
}

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Name	Size	Perms	Modified	Actions
agents.js	5.79 KB	lrw-r--r--	2026-02-23 06:54:00	Edit Download recursive recursive
dns.js	1.22 KB	lrw-r--r--	2026-02-23 06:54:00	Edit Download recursive recursive
errors.js	1.36 KB	lrw-r--r--	2026-02-23 06:54:00	Edit Download recursive recursive
index.js	1.23 KB	lrw-r--r--	2026-02-23 06:54:00	Edit Download recursive recursive
options.js	2.38 KB	lrw-r--r--	2026-02-23 06:54:00	Edit Download recursive recursive
proxy.js	1.96 KB	lrw-r--r--	2026-02-23 06:54:00	Edit Download recursive recursive

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