ensuring that absolute path stay absolute. close #3

pipeline/compressors/__init__.py

@@ -207,7 +207,7 @@ class Compressor(object):
     def relative_path(self, absolute_path):
         """Rewrite paths relative to the output stylesheet path"""
         compress_root = os.path.normpath(settings.PIPELINE_ROOT)
-        return os.path.join('../', absolute_path.replace(compress_root, ''))
+        return os.path.join(os.sep, absolute_path.replace(compress_root, ''))
 
     def read_file(self, path):
         """Read file content in binary mode"""

pipeline/conf/settings.py

 from django.conf import settings
+from django.core.exceptions import ImproperlyConfigured
 
 
 PIPELINE_ROOT = getattr(settings, 'PIPELINE_ROOT', settings.MEDIA_ROOT)
@@ -57,3 +58,7 @@ PIPELINE_LESS_ARGUMENTS = getattr(settings, 'PIPELINE_LESS_ARGUMENTS', '-x')
 
 if PIPELINE_COMPILERS is None:
     PIPELINE_COMPILERS = []
+
+if not PIPELINE_URL:
+    raise ImproperlyConfigured("You're using the pipeline app "
+            "without having set the required STATIC_URL setting.")

tests/static/css/urls.css

@@ -2,6 +2,9 @@
   background-image: url(../images/sprite-buttons.png);
 }
 .absolute-url {
+  background-image: url(/images/sprite-buttons.png);
+}
+.absolute-full-url {
   background-image: url(http://localhost/images/sprite-buttons.png);
 }
 .no-protocol-url {

tests/tests/compressor.py

@@ -82,10 +82,13 @@ class CompressorTest(TestCase):
         output = self.compressor.concatenate_and_rewrite([
             'css/urls.css',
         ])
-        self.assertEquals(""".relative-url {
+        self.assertMultiLineEqual(""".relative-url {
   background-image: url(http://localhost/static/images/sprite-buttons.png);
 }
 .absolute-url {
+  background-image: url(http://localhost/static/images/sprite-buttons.png);
+}
+.absolute-full-url {
   background-image: url(http://localhost/images/sprite-buttons.png);
 }
 .no-protocol-url {