csswatcher 
Generate completion suitable for ac-html, company-web
Used by ac-html-csswatcher project to provide emacs CSS, LESS class names completion.
Installing
Using cpanminus:
git clone https://github.com/osv/csswatcher.git
cd csswatcher
curl -L https://cpanmin.us | perl - --sudo App::cpanminus
sudo cpanm -v -i .
or:
perl Makefile.PL
make
make test
sudo make install
More info after installation.
man csswatcher
File .csswatcher
May be used like .projectile or .git for setting project home directory and setup ignored files:
% cat .csswatcher
# ignore minified css files "min.css"
ignore: min\.css$
# ignore bootstrap css files
ignore: bootstrap.*css$
Another example:
% cat .csswatcher
# ignore all css except app.css
ignore: \.css$
use: app\.css
See also https://github.com/osv/ac-html-csswatcher