Cactus v3 Sass compiler

config.json

{
    "prettify": true,
    "ignore": ["css/*.scss"]
}

sass.py

import os

# - This was written for Cactus v3 (https://github.com/koenbok/Cactus/tree/v3/cactus)
# - Sass is expected to be installed on the system.
# - This works without the current static template tag warnings.
#   that .css doesn't exist since it runs with preBuild compiling
#   the sass files in place.
# - The ignore pattern in config will prevent Cactus from moving
#   Sass files to the build directory. Change to .sass if using other
#   syntax.
# - Caveat is the .css files will remain in the static directory.

def preBuild(site):
    os.system('sass -t compressed --update {0}'.format(
        os.path.join(site.paths['static'], 'css'))
    )