add support to load .env file into os.environ

configurations/base.py

@@ -41,6 +41,39 @@ class ConfigurationBase(type):
         return "<Configuration '{0}.{1}'>".format(self.__module__,
                                                   self.__name__)
 
+    @staticmethod
+    def read_env(env_file='.env', **overrides):
+        """
+        Pulled from Honcho code with minor updates, reads local default
+        environment variables from a .env file located in the project root
+        directory.
+
+        http://www.wellfireinteractive.com/blog/easier-12-factor-django/
+        https://gist.github.com/bennylope/2999704
+        """
+        import re
+        import os
+
+        with open(env_file) as f:
+            content = f.read()
+
+            for line in content.splitlines():
+                m1 = re.match(r'\A([A-Za-z_0-9]+)=(.*)\Z', line)
+                if not m1:
+                    continue
+                key, val = m1.group(1), m1.group(2)
+                m2 = re.match(r"\A'(.*)'\Z", val)
+                if m2:
+                    val = m2.group(1)
+                m3 = re.match(r'\A"(.*)"\Z', val)
+                if m3:
+                    val = re.sub(r'\\(.)', r'\1', m3.group(1))
+                os.environ.setdefault(key, val)
+
+        # set defaults
+        for key, value in overrides.items():
+            os.environ.setdefault(key, value)
+
 
 class Configuration(six.with_metaclass(ConfigurationBase)):
     """

test_project/.env

@@ -0,0 +1 @@
+DJANGO_ENV_LOADED=True

tests/settings/main.py

@@ -3,9 +3,13 @@ import uuid
 import django
 
 from configurations import Configuration, pristinemethod
+from configurations.values import BooleanValue
 
 
 class Test(Configuration):
+
+    ENV_LOADED = BooleanValue(False)
+
     DEBUG = True
 
     SITE_ID = 1
@@ -60,6 +64,7 @@ class Test(Configuration):
     @classmethod
     def pre_setup(cls):
         cls.PRE_SETUP_TEST_SETTING = 6
+        cls.read_env('test_project/.env')
 
     @classmethod
     def post_setup(cls):

tests/test_env.py

@@ -0,0 +1,10 @@
+import os
+from django.test import TestCase
+from configurations.values import BooleanValue
+from mock import patch
+
+class EnvValueTests(TestCase):
+
+    def test_env_loaded(self):
+        check_value = BooleanValue(False)
+        self.assertEqual(check_value.setup('ENV_LOADED'), True)