Homepage: https://www.gnu.org/software/emacs
Author: Steve Purcell
Major mode for editing Less CSS files
This mode provides syntax highlighting for Less CSS files (https://lesscss.org/), plus optional support for compilation of .less files to .css files at the time they are saved: use `less-css-compile-at-save' to enable this. Command line utility "lessc" is required if setting `less-css-compile-at-save' to t. To install "lessc" using the Node.js package manager, run "npm install less". Also make sure the "lessc" executable is in Emacs's PATH, example: (push (expand-file-name "~/.gem/ruby/1.8/bin") exec-path) or customize `less-css-lessc-command' to point to your "lessc" executable. We target lessc >= 1.4.0, and thus use the `--no-color' flag by default. You may want to adjust `less-css-lessc-options' for compatibility with older versions. `less-css-mode' is derived from `css-mode', and indentation of nested blocks may not work correctly with versions of `css-mode' other than that bundled with recent Emacs. You can specify per-file values for `less-css-compile-at-save', `less-css-output-file-name' or `less-css-output-directory' using a variables header at the top of your .less file, e.g.: // -*- less-css-compile-at-save: t; less-css-output-directory: "../css" -*- Alternatively, you can use directory local variables to set the default value of `less-css-output-directory' for your project. In the case of files which are included in other .less files, you may want to trigger the compilation of a "master" .less file on save: you can accomplish this with `less-css-input-file-name', which is probably best set using directory local variables. If you don't need CSS output but would like to be warned of any syntax errors in your .less source, consider using `flymake-less': https://github.com/purcell/flymake-less. Credits The original code for this mode was, in large part, written using Anton Johansson's scss-mode as a template -- thanks Anton! https://github.com/antonj