Use libsass

Makefile

@@ -35,7 +35,7 @@ javascript:
 
 
 sass:
-	./scripts/sass.sh
+	python scripts/compile_sass.py
 
 
 install-test:
@@ -45,7 +45,6 @@ install-sys-requirements: install-system install-node
 	npm config set loglevel warn
 
 install-dev:
-	gem install sass
 	pip install -q -r requirements/dev.txt
 
 install: install-wheels install-python install-js install-nltk-data install-test install-dev javascript sass

requirements/base.txt

@@ -19,6 +19,7 @@ djangorestframework>=3.1,<3.3
 dogapi==1.2.1
 jsonfield==1.0.3
 lazy==1.1
+libsass==0.10.0
 loremipsum==1.0.5
 python-dateutil==2.1
 python-memcached==1.48

scripts/compile_sass.py

+import sass
+
+BASE_DIR = 'openassessment/xblock/static/'
+sass.compile(
+    dirname=(BASE_DIR+'sass', BASE_DIR+'css'),
+    include_paths=[BASE_DIR+'sass/vendor/bi-app'],
+    output_style='compressed',
+)

scripts/sass.sh

-#!/usr/bin/env bash
-
-cd `dirname $BASH_SOURCE` && cd ../openassessment/xblock/static
-sass --update sass:css --force --style compressed -I ./sass/vendor/bi-app