Based on Clean Blog
lessc --clean-css="--compatibility=ie8 --advanced" main.less ../css/main.min.css
uglifyjs main.js -o main-min.js
uglifyjs /home/doe/work/foo/src/js/file1.js
/home/doe/work/foo/src/js/file2.js
-o foo.min.js
grunt serve
lessc --clean-css="--compatibility=ie8 --advanced" main.less ../css/main.min.css
uglifyjs main.js -o main-min.js
uglifyjs /home/doe/work/foo/src/js/file1.js
/home/doe/work/foo/src/js/file2.js
-o foo.min.js
grunt serve