Move syntax check functionality to an external lib file

AUTHORS

@@ -1 +1,2 @@
-Sindre Sorhus (http://github.com/sindresorhus)
+Sindre Sorhus (https://github.com/sindresorhus)
+Radko Dinev (https://github.com/radkodinev)

tasks/lib/check.js

@@ -0,0 +1,51 @@
+'use strict';
+
+var path = require('path');
+var async = require('async');
+var chalk = require('chalk');
+var spawn = require('win-spawn');
+var grunt = require('grunt');
+
+module.exports = function (files, options, cb) {
+  var failCount = 0;
+  var filesToCheck = files.filter(function (src) {
+    return path.basename(src)[0] !== '_' && grunt.file.exists(src);
+  });
+
+  async.eachLimit(filesToCheck, options.numCPUs, function (src, next) {
+    var bin;
+    var args;
+
+    if (options.bundleExec) {
+      bin = 'bundle';
+      args = ['exec', 'sass', '--check', src];
+    } else {
+      bin = 'sass';
+      args = ['--check', src];
+    }
+
+    grunt.verbose.writeln('Command: ' + bin + ' ' + args.join(' '));
+
+    grunt.verbose.writeln('Checking file ' + chalk.cyan(src) + ' syntax.');
+    spawn(bin, args, { stdio: 'inherit' })
+      .on('error', grunt.warn)
+      .on('close', function (code) {
+        if (code > 0) {
+          failCount++;
+          grunt.log.error('Checking file ' + chalk.cyan(src) + ' - ' + chalk.red('failed') + '.');
+        } else {
+          grunt.verbose.ok('Checking file ' + chalk.cyan(src) + ' - ' + chalk.green('passed') + '.');
+        }
+
+        next();
+      });
+  }, function () {
+    if (failCount > 0) {
+      grunt.warn('Sass check failed for ' + failCount + ' files.');
+    } else {
+      grunt.log.ok('All ' + chalk.cyan(filesToCheck.length) + ' files passed.');
+    }
+
+    cb();
+  });
+};

tasks/sass.js

@@ -1,11 +1,5 @@
-/*
- * grunt-contrib-sass
- * http://gruntjs.com/
- *
- * Copyright (c) 2013 Sindre Sorhus, contributors
- * Licensed under the MIT license.
- */
 'use strict';
+
 var path = require('path');
 var dargs = require('dargs');
 var numCPUs = require('os').cpus().length || 1;
@@ -31,50 +25,6 @@ module.exports = function (grunt) {
     }
   };
 
-  var checkFiles = function (files, options, cb) {
-    var failCount = 0;
-    var filesToCheck = files.filter(function (src) {
-      return path.basename(src)[0] !== '_' && grunt.file.exists(src);
-    });
-
-    async.eachLimit(filesToCheck, numCPUs, function (src, next) {
-      var bin;
-      var args;
-
-      if (options.bundleExec) {
-        bin = 'bundle';
-        args = ['exec', 'sass', '--check', src];
-      } else {
-        bin = 'sass';
-        args = ['--check', src];
-      }
-
-      grunt.verbose.writeln('Command: ' + bin + ' ' + args.join(' '));
-
-      grunt.verbose.writeln('Checking file ' + chalk.cyan(src) + ' syntax.');
-      spawn(bin, args, { stdio: 'inherit' })
-        .on('error', grunt.warn)
-        .on('close', function (code) {
-          if (code > 0) {
-            failCount++;
-            grunt.log.error('Checking file ' + chalk.cyan(src) + ' - ' + chalk.red('failed') + '.');
-          } else {
-            grunt.verbose.ok('Checking file ' + chalk.cyan(src) + ' - ' + chalk.green('passed') + '.');
-          }
-
-          next();
-        });
-    }, function () {
-      if (failCount > 0) {
-        grunt.warn('Sass check failed for ' + failCount + ' files.');
-      } else {
-        grunt.log.ok('All ' + chalk.cyan(filesToCheck.length) + ' files passed.');
-      }
-
-      cb();
-    });
-  };
-
   grunt.registerMultiTask('sass', 'Compile Sass to CSS', function () {
     var cb = this.async();
     var options = this.options();
@@ -93,7 +43,9 @@ module.exports = function (grunt) {
     }
 
     if (options.check) {
-      checkFiles(this.filesSrc, options, cb);
+      options.numCPUs = numCPUs;
+
+      require('./lib/check')(this.filesSrc, options, cb);
       return;
     }