Merge "Take plugin params from ENV rather than default"

keystoneclient/auth/base.py

@@ -155,14 +155,12 @@ class BaseAuthPlugin(object):
                 args.append('--os-%s' % o.name)
                 envs.append('OS_%s' % o.name.replace('-', '_').upper())
 
-            default = opt.default
-            if default is None:
             # select the first ENV that is not false-y or return None
             env_vars = (os.environ.get(e) for e in envs)
             default = six.next(six.moves.filter(None, env_vars), None)
 
             parser.add_argument(*args,
-                                default=default,
+                                default=default or opt.default,
                                 metavar=opt.metavar,
                                 help=opt.help,
                                 dest='os_%s' % opt.dest)

keystoneclient/tests/auth/test_cli.py

@@ -13,6 +13,7 @@
 import argparse
 import uuid
 
+import fixtures
 import mock
 from oslo.config import cfg
 
@@ -43,6 +44,13 @@ class CliTests(utils.TestCase):
         super(CliTests, self).setUp()
         self.p = argparse.ArgumentParser()
 
+    def env(self, name, value=None):
+        if value is not None:
+            # environment variables are always strings
+            value = str(value)
+
+        return self.useFixture(fixtures.EnvironmentVariable(name, value))
+
     def test_creating_with_no_args(self):
         ret = cli.register_argparse_arguments(self.p, [])
         self.assertIsNone(ret)
@@ -140,6 +148,18 @@ class CliTests(utils.TestCase):
         self.assertIs(utils.MockPlugin, klass)
         m.assert_called_once_with(name)
 
+    @utils.mock_plugin
+    def test_env_overrides_default_opt(self, m):
+        name = uuid.uuid4().hex
+        val = uuid.uuid4().hex
+        self.env('OS_A_STR', val)
+
+        klass = cli.register_argparse_arguments(self.p, [], default=name)
+        opts = self.p.parse_args([])
+        a = klass.load_from_argparse_arguments(opts)
+
+        self.assertEqual(val, a['a_str'])
+
     def test_deprecated_cli_options(self):
         TesterPlugin.register_argparse_arguments(self.p)
         val = uuid.uuid4().hex

keystoneclient/tests/auth/utils.py

@@ -30,6 +30,8 @@ class MockPlugin(base.BaseAuthPlugin):
     INT_DESC = 'test int'
     FLOAT_DESC = 'test float'
     BOOL_DESC = 'test bool'
+    STR_DESC = 'test str'
+    STR_DEFAULT = uuid.uuid4().hex
 
     def __init__(self, **kwargs):
         self._data = kwargs
@@ -49,6 +51,7 @@ class MockPlugin(base.BaseAuthPlugin):
             cfg.IntOpt('a-int', default='3', help=cls.INT_DESC),
             cfg.BoolOpt('a-bool', help=cls.BOOL_DESC),
             cfg.FloatOpt('a-float', help=cls.FLOAT_DESC),
+            cfg.StrOpt('a-str', help=cls.STR_DESC, default=cls.STR_DEFAULT),
         ]