validate argument length

[BREAKING] drop support for Node.js < 6
shinnn · Jun 18, 2018 · f815eb5 · f815eb5
1 parent 6ab4de6
commit f815eb5
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Showing 3 changed files with 2,672 additions and 408 deletions.
diff --git a/index.js b/index.js
@@ -1,11 +1,19 @@
 'use strict';
 
-const join = require('path').join;
+const {join} = require('path');
 
 const npmCliDir = require('npm-cli-dir');
 
-module.exports = function npmCliVersion() {
+module.exports = function npmCliVersion(...args) {
+  const argLen = args.length;
+
+  if (argLen !== 0) {
+    return Promise.reject(new RangeError(`Expected no arguments, but got ${argLen} argument${
+      argLen === 1 ? '' : 's'
+    }.`));
+  }
+
   return npmCliDir().then(dirPath => {
-    return require(join(dirPath, './package.json')).version;
+    return require(join(dirPath, 'package.json')).version;
   });
 };