Gulp: added 'cleanup' task that erases all gulp-generated files.

It uses Git to erase those files, so anything that's tracked in Git (such
as the JS/CSS vendor directories) are kept as-is.

gulpfile.js

@@ -3,6 +3,7 @@ var autoprefixer = require('gulp-autoprefixer');
 var cache        = require('gulp-cached');
 var chmod        = require('gulp-chmod');
 var concat       = require('gulp-concat');
+var git          = require('gulp-git');
 var gulpif       = require('gulp-if');
 var gulp         = require('gulp');
 var livereload   = require('gulp-livereload');
@@ -112,6 +113,19 @@ gulp.task('watch',function() {
     gulp.watch('src/scripts/markdown/**/*.js',['scripts_concat_markdown']);
 });
 
+// Erases all generated files in output directories.
+gulp.task('cleanup', function() {
+    var paths = [];
+    for (attr in destination) {
+        paths.push(destination[attr]);
+    }
+
+    git.clean({ args: '-f -X ' + paths.join(' ') }, function (err) {
+        if(err) throw err;
+    });
+
+});
+
 
 // Run 'gulp' to build everything at once
 gulp.task('default', ['styles', 'templates', 'scripts', 'scripts_concat_tutti', 'scripts_concat_markdown']);

package.json

@@ -13,6 +13,7 @@
     "gulp-chmod": "~1.3.0",
     "gulp-concat": "~2.6.0",
     "gulp-if": "^2.0.1",
+    "gulp-git": "~2.4.2",
     "gulp-livereload": "~3.8.1",
     "gulp-plumber": "~1.1.0",
     "gulp-pug": "~3.2.0",