usage: lessc [option option=parameter ...] <source> [destination]
If source is set to `-' (dash or hyphen-minus), input is read from stdin.
options:
-h, --help               Prints help (this message) and exit.
--include-path=PATHS     Sets include paths. Separated by `:'. `;' also supported on windows.
-M, --depends            Outputs a makefile import dependency list to stdout.
--no-color               Disables colorized output.
--no-ie-compat           Disables IE compatibility checks.
--no-js                  Disables JavaScript in less files
-l, --lint               Syntax check only (lint).
-s, --silent             Suppresses output of error messages.
--strict-imports         Forces evaluation of imports.
--insecure               Allows imports from insecure https hosts.
-v, --version            Prints version number and exit.
--verbose                Be verbose.
--source-map[=FILENAME]  Outputs a v3 sourcemap to the filename (or output filename.map).
--source-map-rootpath=X  Adds this path onto the sourcemap filename and less file paths.
--source-map-basepath=X  Sets sourcemap base path, defaults to current working directory.
--source-map-less-inline Puts the less files into the map instead of referencing them.
--source-map-map-inline  Puts the map (and any less files) as a base64 data uri into the output css file.
--source-map-url=URL     Sets a custom URL to map file, for sourceMappingURL comment
in generated CSS file.
-rp, --rootpath=URL      Sets rootpath for url rewriting in relative imports and urls
Works with or without the relative-urls option.
-ru, --relative-urls     Re-writes relative urls to the base less file.
-sm=on|off               Turns on or off strict math, where in strict mode, math.
--strict-math=on|off     Requires brackets. This option may default to on and then
be removed in the future.
-su=on|off               Allows mixed units, e.g. 1px+1em or 1px*1px which have units
--strict-units=on|off    that cannot be represented.
--global-var='VAR=VALUE' Defines a variable that can be referenced by the file.
--modify-var='VAR=VALUE' Modifies a variable already declared in the file.
--url-args='QUERYSTRING' Adds params into url tokens (e.g. 42, cb=42 or 'a=1&b=2')
--plugin=PLUGIN=OPTIONS  Loads a plugin. You can also omit the --plugin= if the plugin begins
less-plugin. E.g. the clean css plugin is called less-plugin-clean-css
once installed (npm install less-plugin-clean-css), use either with
--plugin=less-plugin-clean-css or just --clean-css
specify options afterwards e.g. --plugin=less-plugin-clean-css="advanced"
or --clean-css="advanced"
-------------------------- Deprecated ----------------
--line-numbers=TYPE      Outputs filename and line numbers.
TYPE can be either 'comments', which will output
the debug info within comments, 'mediaquery'
that will output the information within a fake
media query which is compatible with the SASS
format, and 'all' which will do both.
-x, --compress           Compresses output by removing some whitespaces.
We recommend you use a dedicated minifer like less-plugin-clean-css
Report bugs to: http://github.com/less/less.js/issues
Home page: <http://lesscss.org/>