settings.py

import os

# Our django-pipeline settings
PATH_TO_HERE = os.getcwd()

STATICFILES_STORAGE = 'pipeline.storage.PipelineCachedStorage'

PIPELINE_CSS = {
    'standard': {
        'source_filenames': (
          'css/chosen.css',
          'less/bootstrap_files/bootstrap.less',
        ),
        'output_filename': 'css/s.css',
        'extra_context': {
            'media': 'screen,projection',
        },
    },

    'my_site': {
        'source_filenames': (
            'less/global.less',
            'less/simple.less',
        ),
        'output_filename': 'css/g.css',
        'extra_context': {
            'media': 'screen,projection',
        }
    }
}

PIPELINE_JS = {
    'standard': {
        'source_filenames': [
            'js/sample1.js',
            'js/sample2.js',
        ],
        'output_filename': 'js/s.js',
    }
}

PIPELINE_COMPILERS = (
    'pipeline.compilers.less.LessCompiler',
)

# If we are on heroku we want to re-define the location of the less binary.
HEROKU_LESSC = os.path.join(PATH_TO_HERE, 'lib/node_modules/less/bin/lessc')
HEROKU_NODE = os.path.join(PATH_TO_HERE, 'bin/node')
if os.path.exists(HEROKU_LESSC):
    PIPELINE_LESS_BINARY = "{0} {1}".format(HEROKU_NODE, HEROKU_LESSC)

PIPELINE_LESS_ARGUMENTS = '--include-path=' + ':'.join('{0}/{1}/static/less'.format(PATH_TO_HERE, app) for app in INSTALLED_APPS if app in os.listdir(PATH_TO_HERE))