build: switch stylesheet to scss (#20283)

debian/control

@@ -2,7 +2,7 @@ Source: chrono
 Maintainer: Frederic Peters <fpters@entrouvert.com>
 Section: python
 Priority: optional
-Build-Depends: python-setuptools (>= 0.6b3), python-all (>= 2.6.6-3), python-django, debhelper (>= 7), dh-systemd
+Build-Depends: python-setuptools (>= 0.6b3), python-all (>= 2.6.6-3), python-django, debhelper (>= 7), dh-systemd, ruby-sass
 Standards-Version: 3.9.6
 X-Python-Version: >= 2.7
 

setup.py

@@ -11,6 +11,7 @@ from setuptools.command.install_lib import install_lib as _install_lib
 from distutils.command.build import build as _build
 from distutils.command.sdist import sdist
 from distutils.cmd import Command
+from distutils.spawn import find_executable
 from setuptools import setup, find_packages
 
 class eo_sdist(sdist):
@@ -72,8 +73,40 @@ class compile_translations(Command):
             sys.stderr.write('!!! Please install Django >= 1.4 to build translations\n')
 
 
+class compile_scss(Command):
+    description = 'compile scss files into css files'
+    user_options = []
+
+    def initialize_options(self):
+        pass
+
+    def finalize_options(self):
+        pass
+
+    def run(self):
+        sass_bin = None
+        for program in ('sass', 'sassc'):
+            sass_bin = find_executable(program)
+            if sass_bin:
+                break
+        if not sass_bin:
+            raise CompileError('A sass compiler is required but none was found.  See sass-lang.com for choices.')
+
+        for package in self.distribution.packages:
+            for package_path in __import__(package).__path__:
+                for path, dirnames, filenames in os.walk(package_path):
+                    for filename in filenames:
+                        if not filename.endswith('.scss'):
+                            continue
+                        if filename.startswith('_'):
+                            continue
+                        subprocess.check_call([sass_bin, '%s/%s' % (path, filename),
+                            '%s/%s' % (path, filename.replace('.scss', '.css'))])
+
+
 class build(_build):
-    sub_commands = [('compile_translations', None)] + _build.sub_commands
+    sub_commands = [('compile_translations', None),
+                    ('compile_scss', None) ] + _build.sub_commands
 
 
 class install_lib(_install_lib):
@@ -113,6 +146,7 @@ setup(
     zip_safe=False,
     cmdclass={
         'build': build,
+        'compile_scss': compile_scss,
         'compile_translations': compile_translations,
         'install_lib': install_lib,
         'sdist': eo_sdist,