resolves #1223: fix interaction with symbolic links

- symbolic links are followed if they are not broken
- move `lookupFiles()` into `utils` module
- add some tests for the symbolic link stuff
- build

Author: Christopher Hiller

bin/_mocha

@@ -284,8 +284,6 @@ program.compilers.forEach(function(c) {
   extensions.push(ext);
 });
 
-var re = new RegExp('\\.(' + extensions.join('|') + ')$');
-
 // requires
 
 requires.forEach(function(mod) {
@@ -302,7 +300,7 @@ var files = []
 if (!args.length) args.push('test');
 
 args.forEach(function(arg){
-  files = files.concat(lookupFiles(arg, program.recursive));
+  files = files.concat(utils.lookupFiles(arg, extensions, program.recursive));
 });
 
 // resolve
@@ -439,40 +437,6 @@ function stop() {
   clearInterval(play.timer);
 }
 
-/**
- * Lookup file names at the given `path`.
- */
-
-function lookupFiles(path, recursive) {
-  var files = [];
-
-  if (!exists(path)) {
-    if (exists(path + '.js')) {
-      path += '.js'
-    } else {
-      files = glob.sync(path);
-      if (!files.length) throw new Error("cannot resolve path (or pattern) '" + path + "'");
-      return files;
-    }
-  }
-
-  var stat = fs.statSync(path);
-  if (stat.isFile()) return path;
-
-  fs.readdirSync(path).forEach(function(file){
-    file = join(path, file);
-    var stat = fs.statSync(file);
-    if (stat.isDirectory()) {
-      if (recursive) files = files.concat(lookupFiles(file, recursive));
-      return
-    }
-    if (!stat.isFile() || !re.test(file) || basename(file)[0] == '.') return;
-    files.push(file);
-  });
-
-  return files;
-}
-
 /**
  * Play the given array of strings.
  */

lib/utils.js

@@ -4,6 +4,9 @@
 
 var fs = require('fs')
   , path = require('path')
+  , basename = path.basename
+  , exists = fs.existsSync || path.existsSync
+  , glob = require('glob')
   , join = path.join
   , debug = require('debug')('mocha:watch');
 
@@ -348,3 +351,49 @@ exports.canonicalize = function(obj, stack) {
 
    return canonicalizedObj;
  }
+
+/**
+ * Lookup file names at the given `path`.
+ */
+exports.lookupFiles = function lookupFiles(path, extensions, recursive) {
+  var files = [];
+  var re = new RegExp('\\.(' + extensions.join('|') + ')$');
+
+  if (!exists(path)) {
+    if (exists(path + '.js')) {
+      path += '.js';
+    } else {
+      files = glob.sync(path);
+      if (!files.length) throw new Error("cannot resolve path (or pattern) '" + path + "'");
+      return files;
+    }
+  }
+
+  try {
+    var stat = fs.statSync(path);
+    if (stat.isFile()) return path;
+  }
+  catch (ignored) {
+    return;
+  }
+
+  fs.readdirSync(path).forEach(function(file){
+    file = join(path, file);
+    try {
+      var stat = fs.statSync(file);
+      if (stat.isDirectory()) {
+        if (recursive) {
+          files = files.concat(lookupFiles(file, recursive));
+        }
+        return;
+      }
+    }
+    catch (ignored) {
+      return;
+    }
+    if (!stat.isFile() || !re.test(file) || basename(file)[0] === '.') return;
+    files.push(file);
+  });
+
+  return files;
+}

mocha.js

@@ -5498,6 +5498,9 @@ require.register("utils.js", function(module, exports, require){
 
 var fs = require('browser/fs')
   , path = require('browser/path')
+  , basename = path.basename
+  , exists = fs.existsSync || path.existsSync
+  , glob = require('glob')
   , join = path.join
   , debug = require('browser/debug')('mocha:watch');
 
@@ -5843,6 +5846,52 @@ exports.canonicalize = function(obj, stack) {
    return canonicalizedObj;
  }
 
+/**
+ * Lookup file names at the given `path`.
+ */
+exports.lookupFiles = function lookupFiles(path, extensions, recursive) {
+  var files = [];
+  var re = new RegExp('\\.(' + extensions.join('|') + ')$');
+
+  if (!exists(path)) {
+    if (exists(path + '.js')) {
+      path += '.js';
+    } else {
+      files = glob.sync(path);
+      if (!files.length) throw new Error("cannot resolve path (or pattern) '" + path + "'");
+      return files;
+    }
+  }
+
+  try {
+    var stat = fs.statSync(path);
+    if (stat.isFile()) return path;
+  }
+  catch (ignored) {
+    return;
+  }
+
+  fs.readdirSync(path).forEach(function(file){
+    file = join(path, file);
+    try {
+      var stat = fs.statSync(file);
+      if (stat.isDirectory()) {
+        if (recursive) {
+          files = files.concat(lookupFiles(file, recursive));
+        }
+        return;
+      }
+    }
+    catch (ignored) {
+      return;
+    }
+    if (!stat.isFile() || !re.test(file) || basename(file)[0] === '.') return;
+    files.push(file);
+  });
+
+  return files;
+}
+
 }); // module: utils.js
 // The global object is "self" in Web Workers.
 var global = (function() { return this; })();

test/acceptance/utils.js

@@ -86,4 +86,30 @@ describe('lib/utils', function () {
       utils.stringify(travis).should.equal('{\n  "name": "travis"\n  "whoami": "[Circular]"\n}');
     });
   });
+
+  describe('lookupFiles', function () {
+    var fs = require('fs');
+
+    beforeEach(function () {
+      fs.writeFileSync('/tmp/mocha-utils.js', 'yippy skippy ying yang yow');
+      fs.symlinkSync('/tmp/mocha-utils.js', '/tmp/mocha-utils-link.js');
+    });
+
+    it('should not choke on symlinks', function () {
+      utils.lookupFiles('/tmp', ['js'], false).should.eql(['/tmp/mocha-utils-link.js', '/tmp/mocha-utils.js']);
+      fs.existsSync('/tmp/mocha-utils-link.js').should.be.true;
+      fs.rename('/tmp/mocha-utils.js', '/tmp/bob');
+      fs.existsSync('/tmp/mocha-utils-link.js').should.be.true;
+      utils.lookupFiles('/tmp', ['js'], false).should.eql([]);
+    });
+
+    afterEach(function () {
+      ['/tmp/mocha-utils.js', '/tmp/mocha-utils-link.js', '/tmp/bob'].forEach(function (path) {
+        try {
+          fs.unlinkSync(path);
+        }
+        catch (ignored) {}
+      });
+    })
+  });
 });