Read config files without interpolation

Fixes #84

supysonic/config.py

@@ -10,9 +10,9 @@
 # Distributed under terms of the GNU AGPLv3 license.
 
 try:
-    from configparser import ConfigParser
+    from configparser import RawConfigParser
 except ImportError:
-    from ConfigParser import SafeConfigParser as ConfigParser
+    from ConfigParser import RawConfigParser
 
 import os
 import tempfile
@@ -55,7 +55,7 @@ class IniConfig(DefaultConfig):
     ]
 
     def __init__(self, paths):
-        parser = ConfigParser()
+        parser = RawConfigParser()
         parser.read(paths)
 
         for section in parser.sections():

tests/assets/sample.ini

@@ -11,3 +11,7 @@ switch_true = on
 yn_false = no
 yn_true = yes
 
+[issue84]
+variable = value
+key = some value with a %variable
+

tests/base/test_config.py

@@ -4,7 +4,7 @@
 # This file is part of Supysonic.
 # Supysonic is a Python implementation of the Subsonic server API.
 #
-# Copyright (C) 2017 Alban 'spl0k' Féron
+# Copyright (C) 2017-2018 Alban 'spl0k' Féron
 #
 # Distributed under terms of the GNU AGPLv3 license.
 
@@ -32,6 +32,12 @@ class ConfigTestCase(unittest.TestCase):
             self.assertFalse(conf.BOOLEANS[t + '_false'])
             self.assertTrue(conf.BOOLEANS[t + '_true'])
 
+    def test_no_interpolation(self):
+        conf = IniConfig('tests/assets/sample.ini')
+
+        self.assertEqual(conf.ISSUE84['variable'], 'value')
+        self.assertEqual(conf.ISSUE84['key'], 'some value with a %variable')
+
 if __name__ == '__main__':
     unittest.main()