update

package/node_modules/@npmcli/agent/lib/index.js

@@ -0,0 +1,56 @@
+'use strict'
+
+const { LRUCache } = require('lru-cache')
+const { normalizeOptions, cacheOptions } = require('./options')
+const { getProxy, proxyCache } = require('./proxy.js')
+const dns = require('./dns.js')
+const Agent = require('./agents.js')
+
+const agentCache = new LRUCache({ max: 20 })
+
+const getAgent = (url, { agent, proxy, noProxy, ...options } = {}) => {
+  // false has meaning so this can't be a simple truthiness check
+  if (agent != null) {
+    return agent
+  }
+
+  url = new URL(url)
+
+  const proxyForUrl = getProxy(url, { proxy, noProxy })
+  const normalizedOptions = {
+    ...normalizeOptions(options),
+    proxy: proxyForUrl,
+  }
+
+  const cacheKey = cacheOptions({
+    ...normalizedOptions,
+    secureEndpoint: url.protocol === 'https:',
+  })
+
+  if (agentCache.has(cacheKey)) {
+    return agentCache.get(cacheKey)
+  }
+
+  const newAgent = new Agent(normalizedOptions)
+  agentCache.set(cacheKey, newAgent)
+
+  return newAgent
+}
+
+module.exports = {
+  getAgent,
+  Agent,
+  // these are exported for backwards compatability
+  HttpAgent: Agent,
+  HttpsAgent: Agent,
+  cache: {
+    proxy: proxyCache,
+    agent: agentCache,
+    dns: dns.cache,
+    clear: () => {
+      proxyCache.clear()
+      agentCache.clear()
+      dns.cache.clear()
+    },
+  },
+}