Refactor all modules into a britney2 subdir

That way they are all contained.

Signed-off-by: Niels Thykier <niels@thykier.net>

britney.py

@@ -181,25 +181,26 @@ does for the generation of the update excuses.
 """
 from __future__ import print_function
 
+import optparse
 import os
 import sys
 import time
-import optparse
-
-import apt_pkg
-
 from collections import defaultdict, namedtuple
 from functools import reduce
 from itertools import product
 from operator import attrgetter
-
 from urllib.parse import quote
 
-from installability.builder import InstallabilityTesterBuilder
-from excuse import Excuse
-from migrationitem import MigrationItem
-from hints import HintParser
-from britney_util import (old_libraries_format, undo_changes,
+import apt_pkg
+
+# Check the "check_field_name" reflection before removing an import here.
+from britney2.consts import (SOURCE, SOURCEVER, ARCHITECTURE, CONFLICTS, DEPENDS, PROVIDES, MULTIARCH)
+from britney2.excuse import Excuse
+from britney2.hints import HintParser
+from britney2.installability.builder import InstallabilityTesterBuilder
+from britney2.migrationitem import MigrationItem
+from britney2.policies.policy import AgePolicy, RCBugPolicy, PolicyVerdict
+from britney2.utils import (old_libraries_format, undo_changes,
                             compute_reverse_tree, possibly_compressed,
                             read_nuninst, write_nuninst, write_heidi,
                             eval_uninst, newly_uninst, make_migrationitem,
@@ -208,11 +209,6 @@ from britney_util import (old_libraries_format, undo_changes,
                             clone_nuninst, check_installability,
                             create_provides_map,
                             )
-from policies.policy import AgePolicy, RCBugPolicy, PolicyVerdict
-
-# Check the "check_field_name" reflection before removing an import here.
-from consts import (SOURCE, SOURCEVER, ARCHITECTURE, CONFLICTS, DEPENDS,
-                   PROVIDES, MULTIARCH)
 
 __author__ = 'Fabio Tranchitella and the Debian Release Team'
 __version__ = '2.0'
@@ -2778,7 +2774,7 @@ class Britney(object):
         self.nuninst_orig_save = self.get_nuninst()
 
         import readline
-        from completer import Completer
+        from britney2.completer import Completer
 
         histfile = os.path.expanduser('~/.britney2_history')
         if os.path.exists(histfile):

britney2/hints.py

@@ -16,7 +16,7 @@ from __future__ import print_function
 
 from itertools import chain
 
-from migrationitem import MigrationItem
+from britney2.migrationitem import MigrationItem
 
 
 class MalformedHintException(Exception):

britney2/installability/builder.py

@@ -15,8 +15,9 @@
 from collections import defaultdict
 from contextlib import contextmanager
 
-from britney_util import ifilter_except, iter_except
-from installability.solver import InstallabilitySolver
+from britney2.utils import ifilter_except, iter_except
+from britney2.installability.solver import InstallabilitySolver
+
 
 class _RelationBuilder(object):
     """Private helper class to "build" relations"""

britney2/installability/solver.py

@@ -19,8 +19,8 @@ from __future__ import print_function
 import os
 from collections import deque
 
-from installability.tester import InstallabilityTester
-from britney_util import (ifilter_only, iter_except)
+from britney2.utils import (ifilter_only, iter_except)
+from britney2.installability.tester import InstallabilityTester
 
 
 class InstallabilitySolver(InstallabilityTester):

britney2/installability/tester.py

@@ -16,7 +16,7 @@ from collections import defaultdict
 from functools import partial
 from itertools import chain, filterfalse
 
-from britney_util import iter_except
+from britney2.utils import iter_except
 
 
 class InstallabilityTester(object):

britney2/migrationitem.py

@@ -144,6 +144,7 @@ class MigrationItem(object):
     def uvname(self):
         return self._uvname
 
+
 class UnversionnedMigrationItem(MigrationItem):
     def __init__(self, name=None):
         super().__init__(name=name, versionned=False)

britney2/policies/policy.py

@@ -1,11 +1,12 @@
-from abc import abstractmethod
-from enum import Enum, unique
-import apt_pkg
 import os
 import time
+from abc import abstractmethod
+from enum import Enum, unique
 from urllib.parse import quote
 
-from hints import Hint, split_into_one_hint_per_package
+import apt_pkg
+
+from britney2.hints import Hint, split_into_one_hint_per_package
 
 
 @unique
@@ -93,7 +94,6 @@ class BasePolicy(object):
         """
         pass
 
-
     def apply_policy(self, general_policy_info, suite, source_name, source_data_tdist, source_data_srcdist, excuse):
         if self.policy_id not in general_policy_info:
             general_policy_info[self.policy_id] = pinfo = {}

britney2/utils.py

@@ -21,21 +21,21 @@
 # GNU General Public License for more details.
 
 
+import errno
+import os
+import time
 from collections import defaultdict
-from functools import partial
 from datetime import datetime
+from functools import partial
 from itertools import filterfalse
-import os
-import time
-import yaml
-import errno
 
-from migrationitem import MigrationItem, UnversionnedMigrationItem
+import yaml
 
-from consts import (VERSION, PROVIDES, DEPENDS, CONFLICTS,
+from britney2.consts import (VERSION, PROVIDES, DEPENDS, CONFLICTS,
                              ARCHITECTURE, SECTION,
                              SOURCE, MAINTAINER, MULTIARCH,
                              ESSENTIAL)
+from britney2.migrationitem import MigrationItem, UnversionnedMigrationItem
 
 
 def ifilter_except(container, iterable=None):