Add support for environment variables, change tests accordingly

1 files changed, 84 insertions, 0 deletions

diff --git a/ipalib/config.py b/ipalib/config.py
new file mode 100644
index 00000000..bb345661
--- /dev/null
+++ b/ipalib/config.py
@@ -0,0 +1,84 @@
+# Authors:
+#   Martin Nagy <mnagy@redhat.com>
+#
+# Copyright (C) 2008  Red Hat
+# see file 'COPYING' for use and warranty information
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; version 2 only
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+
+def default_environment():
+    default = dict(
+        conf = '/etc/ipa/ipa.conf',
+        server_context = True,
+        query_dns = True,
+        verbose = False,
+        servers = LazyIter(myservers),
+        realm = LazyProp(myrealm),
+        domain = LazyProp(mydomain),
+    )
+    return default
+
+
+class LazyProp(object):
+    def __init__(self, func, value=None):
+        self._func = func
+        self._value = value
+
+    def set_value(self, value):
+        self._value = value
+
+    def get_value(self):
+        if self._value is None:
+            return self._func()
+        else:
+            return self._value
+
+
+# FIXME: make sure to eliminate duplicates
+class LazyIter(LazyProp):
+    def get_value(self):
+        if self._value is not None:
+            if type(self._value) is tuple:
+                for item in self._value:
+                    yield item
+            else:
+                yield self._value
+        for item in self._func():
+            yield item
+
+
+def read_config(file):
+    assert isinstance(file, basestring)
+    # open the file and read configuration, return a dict
+    # for now, these are here just for testing purposes
+    return dict(servers="server.ipatest.com", realm="IPATEST.COM")
+
+
+# these functions are here just to "emulate" dns resolving for now
+def mydomain():
+    return "ipatest.com"
+
+
+def myrealm():
+    return "IPATEST.COM"
+
+
+def myservers():
+    # print is here to demonstrate that the querying will occur only when it is
+    # really needed
+    print "Querying DNS"
+    yield "server.ipatest.com"
+    yield "backup.ipatest.com"
+    yield "fake.ipatest.com"