Allow custom registries

lib/registry_for.js

@@ -0,0 +1,13 @@
+var registryUrl = require('registry-url')
+
+/*
+ * Returns the registry needed for a certain package.
+ */
+
+module.exports = function registryFor (pkg) {
+  if (pkg.substr(0, 1) === '@') {
+    return registryUrl(pkg.split('/')[0])
+  } else {
+    return registryUrl()
+  }
+}

lib/resolve/npm.js

@@ -2,7 +2,7 @@ var join = require('path').join
 var url = require('url')
 var enc = global.encodeURIComponent
 var got = require('../got')
-var config = require('../config')
+var registryFor = require('../registry_for')
 
 /**
  * Resolves a package in the NPM registry. Done as part of `install()`.
@@ -73,5 +73,5 @@ function toUri (pkg) {
     }
   }
 
-  return url.resolve(config.registry, uri)
+  return url.resolve(registryFor(pkg.name), uri)
 }

package.json

@@ -28,6 +28,7 @@
     "observatory": "1.0.0",
     "rc": "1.1.6",
     "read-pkg-up": "1.0.1",
+    "registry-url": "3.0.3",
     "rimraf": "2.5.1",
     "semver": "5.1.0",
     "tar-fs": "1.9.0",