Don't assume anything about the registry URL, read registries from co…

…nfig

src/registries/base-registry.js

@@ -64,6 +64,16 @@ export default class BaseRegistry {
     return this.config[key];
   }
 
+  getAvailableRegistries(): Array<string> {
+    let config = this.config
+    return Object.keys(config).reduce((registries, option) => {
+      if (option.split(':')[1] === 'registry') {
+        registries.push(config[option])
+      }
+      return registries
+    }, [])
+  }
+
   loadConfig(): Promise<void> {
     return Promise.resolve();
   }

src/registries/npm-registry.js

@@ -141,8 +141,11 @@ export default class NpmRegistry extends Registry {
   getRegistry(packageName: string): string {
     // Try extracting registry from the url, then scoped registry, and default registry
     if (packageName.match(/^https?:/)) {
-      const parts = url.parse(packageName);
-      return parts.protocol + '//' + parts.host + '/';
+      const availableRegistries = this.getAvailableRegistries()
+      const registry = availableRegistries.find(registry => packageName.startsWith(registry))
+      if (registry) {
+        return registry
+      }
     }
 
     for (const scope of [this.getScope(packageName), '']) {