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website/node_modules/npm/lib/config/get-credentials-by-uri.js

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+var assert = require('assert')
+
+var toNerfDart = require('./nerf-dart.js')
+
+module.exports = getCredentialsByURI
+
+function getCredentialsByURI (uri) {
+  assert(uri && typeof uri === 'string', 'registry URL is required')
+  var nerfed = toNerfDart(uri)
+  var defnerf = toNerfDart(this.get('registry'))
+
+  // hidden class micro-optimization
+  var c = {
+    scope: nerfed,
+    token: undefined,
+    password: undefined,
+    username: undefined,
+    email: undefined,
+    auth: undefined,
+    alwaysAuth: undefined
+  }
+
+  // used to override scope matching for tokens as well as legacy auth
+  if (this.get(nerfed + ':always-auth') !== undefined) {
+    var val = this.get(nerfed + ':always-auth')
+    c.alwaysAuth = val === 'false' ? false : !!val
+  } else if (this.get('always-auth') !== undefined) {
+    c.alwaysAuth = this.get('always-auth')
+  }
+
+  if (this.get(nerfed + ':_authToken')) {
+    c.token = this.get(nerfed + ':_authToken')
+    // the bearer token is enough, don't confuse things
+    return c
+  }
+
+  if (this.get(nerfed + ':-authtoken')) {
+    c.token = this.get(nerfed + ':-authtoken')
+    // the bearer token is enough, don't confuse things
+    return c
+  }
+
+  // Handle the old-style _auth=<base64> style for the default
+  // registry, if set.
+  var authDef = this.get('_auth')
+  var userDef = this.get('username')
+  var passDef = this.get('_password')
+  if (authDef && !(userDef && passDef)) {
+    authDef = Buffer.from(authDef, 'base64').toString()
+    authDef = authDef.split(':')
+    userDef = authDef.shift()
+    passDef = authDef.join(':')
+  }
+
+  if (this.get(nerfed + ':_password')) {
+    c.password = Buffer.from(this.get(nerfed + ':_password'), 'base64').toString('utf8')
+  } else if (nerfed === defnerf && passDef) {
+    c.password = passDef
+  }
+
+  if (this.get(nerfed + ':username')) {
+    c.username = this.get(nerfed + ':username')
+  } else if (nerfed === defnerf && userDef) {
+    c.username = userDef
+  }
+
+  if (this.get(nerfed + ':email')) {
+    c.email = this.get(nerfed + ':email')
+  } else if (this.get('email')) {
+    c.email = this.get('email')
+  }
+
+  if (c.username && c.password) {
+    c.auth = Buffer.from(c.username + ':' + c.password).toString('base64')
+  }
+
+  return c
+}