Install lesscsslint with npm to use the command line interface:
npm install -g lesscsslint
Validate a file like so:
or pipe input into stdin:
cat myfile.less | lesscsslint
lesscsslint will either report a syntax error with details or exit quietly.
$ lesscsslint --help Usage: lesscsslint [options] <files> Options: -h, --help output usage information -V, --version output the version number --format <format> Indicate which format to use for output. --errors <rules> Indicate which CSSLint rules to include as errors. --warnings <rules> Indicate which rules to include as warnings. --ignore <rules> Indicate which rules to ignore completely.