Allow setting config options directly (#253)

libmozdata/config.py

@@ -11,12 +11,19 @@ except ImportError:
 
 
 class Config(object):
-    def get(section, option, default=None):
-        raise NotImplementedError
+    def __init__(self):
+        self.local_config = {}
+
+    def set_default(self, section, option, value):
+        self.local_config[(section, option)] = value
+
+    def get(self, section, option, default=None):
+        return self.local_config.get((section, option), default)
 
 
 class ConfigIni(Config):
     def __init__(self, path=None):
+        super().__init__()
         self.config = ConfigParser()
         if path is not None:
             self.config.read(path)
@@ -32,7 +39,9 @@ class ConfigIni(Config):
 
     def get(self, section, option, default=None, type=str):
         if not self.config.has_option(section, option):
+            if default is not None:
                 return default
+            return super().get(section, option)
 
         res = self.config.get(section, option)
         if type == list or type == set:
@@ -48,7 +57,9 @@ class ConfigEnv(Config):
     def get(self, section, option, default=None, type=str):
         env = os.environ.get("LIBMOZDATA_CFG_" + section.upper() + "_" + option.upper())
         if not env:
+            if default is not None:
                 return default
+            return super().get(section, option)
 
         if type == list or type == set:
             return type([s.strip(" /t") for s in env.split(",")])
@@ -72,3 +83,8 @@ def get(section, option, default=None, type=str, required=False):
     if required:
         assert value is not None, f"Option {option} in section {section} is not set"
     return value
+
+
+def set_default_value(section, option, value):
+    global __config
+    __config.set_default(section, option, value)

tests/test_config.py

@@ -171,6 +171,39 @@ class ConfigTest(unittest.TestCase):
         ):
             config.get("User-Agent", "name", required=True)
 
+    def test_set_default_value(self):
+        """
+        The set_value function correctly sets a value in the configuration
+        """
+        with open("config.ini", "w") as f:
+            custom_conf = ConfigParser()
+            custom_conf.add_section("Section 1")
+            custom_conf.set("Section 1", "something", "value")
+            custom_conf.write(f)
+
+        from libmozdata import config
+
+        config.set_config(config.ConfigIni("config.ini"))
+        config.set_default_value("User-Agent", "name", "something-0.1.1")
+
+        self.assertEqual(config.get("User-Agent", "name"), "something-0.1.1")
+
+    def test_local_config_fallback(self):
+        with open("config.ini", "w") as f:
+            custom_conf = ConfigParser()
+            custom_conf.add_section("Section 1")
+            custom_conf.set("Section 1", "something", "value")
+            custom_conf.write(f)
+
+        from libmozdata import config
+
+        config.set_config(config.ConfigIni("config.ini"))
+        config.set_default_value("User-Agent", "name", "something-0.1.1")
+
+        self.assertEqual(
+            config.get("User-Agent", "name", required=True), "something-0.1.1"
+        )
+
 
 class ConfigEnvTest(unittest.TestCase):
     def test_config_env(self):