Move paths into a config variable

gulpfile.js

@@ -3,25 +3,31 @@
 var gulp = require('gulp'),
     plugins = require('gulp-load-plugins')();
 
+var config = {
+    cssDir: './source/assets/css',
+    imagesDir: './source/assets/images',
+    sassPattern: './sass/**/*.scss'
+};
+
 gulp.task('compass', function () {
     gulp.src('./sass')
         .pipe(plugins.compass({
           config_file: './config.rb',
-          css: './source/assets/css'
+          css: config.cssDir
         }))
         .pipe(plugins.minifyCss())
-        .pipe(gulp.dest('./source/assets/css'));
+        .pipe(gulp.dest(config.cssDir));
 });
 
 gulp.task('image', function () {
     // Minify images.
-    gulp.src('./source/assets/images/*')
+    gulp.src(imagesDir + '/*')
         .pipe(plugins.imagemin())
-        .pipe(gulp.dest('./source/assets/images'));
+        .pipe(gulp.dest(config.imagesDir));
 });
 
 gulp.task('watch', function () {
-    gulp.watch('./sass/**/*.scss', ['compass']);
+    gulp.watch(config.sassPattern, ['compass']);
 });
 
 gulp.task('default', ['watch']);