Fawkss [fɔːks] is a simple CSS preprocessor built as a single AWK (nawk/gawk/mawk) script. Syntactically, it borrows as much as possible from the SASS language, for convenience and familiarity.
This is more of a fun project than a production-ready piece of software, though it may find some use for people needing simple additions to CSS without pulling in the massive ecosystem that comes with Less.js/SASS etc.
Lines that contain comments using the `//` syntax are removed from the final output, and are useful for including commentary that should otherwise not be available to end-users.
Comments using the `/* */` syntax are not handled, and remain intact in the final output.
All variables are defined in the global scope, and cannot be used before definition. Using an undefined variable is a fatal error, and halts execution. Variable names can contain alphanumeric characters, as well as underscore and hyphen characters, and are always prefixed with a dollar sign.
Variables must be appear on their own line, and cannot be mixed with other declarations. Redefining a variable overrides its previous value, with no warning message emitted.
CSS import declarations are extended for concatenating SCSS files together transparently. For a file `common/_colors.scss`, the following declarations are equivalent:
It is intended that the script never balloons to more than ~1000 lines of code. I'm trying to tackle the most important features yet and see how well they fit within the AWK mindset.
That being said, I do not plan to implement any context-sensitive functionality (such as nesting etc.), which may be nigh-impossible in AWK anyways. Consider it a feature.
