From eb094216bc022efd0557316b6615bda392613443 Mon Sep 17 00:00:00 2001
From: Outsider <outsideris@gmail.com>
Date: Wed, 7 Mar 2018 13:55:17 +0900
Subject: [PATCH] restore removed methods which still used

It removed from
<https://github.com/mochajs/mocha/commit/ec8901a23c5194b6f7e6eee9c2568e5020c944ce#diff-bfc3bad4c5c554b69af7576a837a3850L44>
---
 lib/utils.js                      | 47 +++++++++++++++++++++++++++++++
 test/node-unit/file-utils.spec.js | 20 +++++++++++++
 2 files changed, 67 insertions(+)

diff --git a/lib/utils.js b/lib/utils.js
index a308490aac..60151b66d4 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -8,8 +8,15 @@ var debug = require('debug')('mocha:watch');
 var fs = require('fs');
 var glob = require('glob');
 var path = require('path');
+var join = path.join;
 var he = require('he');
 
+/**
+ * Ignored directories.
+ */
+
+var ignore = ['node_modules', '.git'];
+
 exports.inherits = require('util').inherits;
 
 /**
@@ -54,6 +61,46 @@ exports.watch = function (files, fn) {
   });
 };
 
+/**
+ * Ignored files.
+ *
+ * @api private
+ * @param {string} path
+ * @return {boolean}
+ */
+function ignored (path) {
+  return !~ignore.indexOf(path);
+}
+
+/**
+ * Lookup files in the given `dir`.
+ *
+ * @api private
+ * @param {string} dir
+ * @param {string[]} [ext=['.js']]
+ * @param {Array} [ret=[]]
+ * @return {Array}
+ */
+exports.files = function (dir, ext, ret) {
+  ret = ret || [];
+  ext = ext || ['js'];
+
+  var re = new RegExp('\\.(' + ext.join('|') + ')$');
+
+  fs.readdirSync(dir)
+    .filter(ignored)
+    .forEach(function (path) {
+      path = join(dir, path);
+      if (fs.lstatSync(path).isDirectory()) {
+        exports.files(path, ext, ret);
+      } else if (path.match(re)) {
+        ret.push(path);
+      }
+    });
+
+  return ret;
+};
+
 /**
  * Compute a slug from the given `str`.
  *
diff --git a/test/node-unit/file-utils.spec.js b/test/node-unit/file-utils.spec.js
index e3c4f4a4ca..1ee06724db 100644
--- a/test/node-unit/file-utils.spec.js
+++ b/test/node-unit/file-utils.spec.js
@@ -105,6 +105,26 @@ describe('file utils', function () {
     });
   });
 
+  describe('.files', function () {
+    (symlinkSupported ? it : it.skip)('should return broken symlink file path', function () {
+      expect(utils.files(tmpDir, ['js']))
+        .to.contain(tmpFile('mocha-utils-link.js'))
+        .and.contain(tmpFile('mocha-utils.js'))
+        .and.have.length(2);
+
+      expect(existsSync(tmpFile('mocha-utils-link.js')))
+        .to.be(true);
+
+      fs.renameSync(tmpFile('mocha-utils.js'), tmpFile('bob'));
+
+      expect(existsSync(tmpFile('mocha-utils-link.js')))
+        .to.be(false);
+
+      expect(utils.files(tmpDir, ['js']))
+        .to.eql([tmpFile('mocha-utils-link.js')]);
+    });
+  });
+
   afterEach(removeTempDir);
 
   function makeTempDir () {