Added the "actor" property. Metakit backend not done (still not confident

[roundup.git] / roundup / instance.py

diff --git a/roundup/instance.py b/roundup/instance.py
index e98953c692d6f416c5dad8bc61f05a407606f31d..81c946167c6e7a8c0c6815ff2f10a35d288aaf0c 100644 (file)
--- a/roundup/instance.py
+++ b/roundup/instance.py
@@ -15,21 +15,46 @@
 # BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE,
 # SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 # 
-# $Id: instance.py,v 1.7 2002-09-17 23:59:32 richard Exp $
+# $Id: instance.py,v 1.12 2004-02-11 23:55:08 richard Exp $
 
-__doc__ = '''
-Tracker handling (open tracker).
+'''Tracker handling (open tracker).
 
-Currently this module provides one function: open. This function opens
-a tracker. Note that trackers used to be called instances.
+Backwards compatibility for the old-style "imported" trackers.
 '''
+__docformat__ = 'restructuredtext'
 
-import imp, os
+import os
 
-class InstanceError(Exception):
+class Vars:
+    ''' I'm just a container '''
+
+class Tracker:
+    def __init__(self, tracker_home):
+        self.tracker_home = tracker_home
+        self.select_db = self._load_python('select_db.py')
+        self.config = self._load_config('config.py')
+        raise NotImplemented, 'this is *so* not finished'
+        self.init =  XXX
+        self.Client = XXX
+        self.MailGW = XXX
+
+    def open(self):
+        return self._load_config('schema.py').db
+        self._load_config('security.py', db=db)
+
+
+    def _load_python(self, file):
+        file = os.path.join(tracker_home, file)
+        vars = Vars()
+        execfile(file, vars.__dict__)
+        return vars
+
+
+class TrackerError(Exception):
     pass
 
-class Opener:
+
+class OldStyleTrackers:
     def __init__(self):
         self.number = 0
         self.trackers = {}
@@ -39,8 +64,17 @@ class Opener:
 
             Raise ValueError if the tracker home doesn't exist.
         '''
+        import imp
+        # sanity check existence of tracker home
         if not os.path.exists(tracker_home):
             raise ValueError, 'no such directory: "%s"'%tracker_home
+
+        # sanity check tracker home contents
+        for reqd in 'config dbinit select_db interfaces'.split():
+            if not os.path.exists(os.path.join(tracker_home, '%s.py'%reqd)):
+                raise TrackerError, 'File "%s.py" missing from tracker '\
+                    'home "%s"'%(reqd, tracker_home)
+
         if self.trackers.has_key(tracker_home):
             return imp.load_package(self.trackers[tracker_home],
                 tracker_home)
@@ -54,16 +88,17 @@ class Opener:
         # ensure the tracker has all the required bits
         for required in 'config open init Client MailGW'.split():
             if not hasattr(tracker, required):
-                raise InstanceError, 'Required tracker attribute "%s" '\
-                    'missing'%required
+                raise TrackerError, \
+                    'Required tracker attribute "%s" missing'%required
 
         return tracker
 
-opener = Opener()
-open = opener.open
-
-del Opener
-del opener
+OldStyleTrackers = OldStyleTrackers()
+def open(tracker_home):
+    if os.path.exists(os.path.join(tracker_home, 'dbinit.py')):
+        # user should upgrade...
+        return OldStyleTrackers.open(tracker_home)
 
+    return Tracker(tracker_home)
 
 # vim: set filetype=python ts=4 sw=4 et si