clean up "extra_require" option setup and add "cssselect" as an optional dependency

1 files changed, 13 insertions, 3 deletions

diff --git a/setup.py b/setup.py
index 6f6d162f..66e9fbcd 100644
--- a/setup.py
+++ b/setup.py
@@ -49,9 +49,19 @@ extra_options = {}
 if 'setuptools' in sys.modules:
     extra_options['zip_safe'] = False
 
-    import pkg_resources
-    extra_options['extra_require'] = {
-            'fast': map(str, pkg_resources.parse_requirements(open("requirements.txt", "r")))
+    try:
+        import pkg_resources
+    except ImportError:
+        pass
+    else:
+        f = open("requirements.txt", "r")
+        try:
+            deps = [str(req) for req in pkg_resources.parse_requirements(f)]
+        finally:
+            f.close()
+        extra_options['extra_require'] = {
+            'source': deps,
+            'cssselect': 'cssselect>=0.7',
         }
 
 extra_options.update(setupinfo.extra_setup_args())