bridge (constructor): refactoring:

- constructors are now in separate modules
    - constructors are discovered dynamically
    - factorised generation code from D-Bus in base Constructor.
    - A generic generation method is now available in base Constructor, using python formatting.
    - removed bridge/bridge.py in core as it was useless, may come back in the future if needed

src/bridge/bridge_constructor/constants.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python2
+#-*- coding: utf-8 -*-
+
+# SàT: a XMPP client
+# Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org)
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# 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 Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from sat.core import constants
+
+
+class Const(constants.Const):
+
+    NAME = u"bridge_constructor"
+    DEST_DIR_DEFAULT = "generated"
+    DESCRIPTION = u"""{name} Copyright (C) 2009-2016 Jérôme Poisson (aka Goffi)
+
+    This script construct a SàT bridge using the given protocol
+
+    This program comes with ABSOLUTELY NO WARRANTY;
+    This is free software, and you are welcome to redistribute it
+    under certain conditions.
+    """.format(name=NAME, version=constants.Const.APP_VERSION)
+# TODO: move protocoles in separate files (plugins?)
+    DEFAULT_PROTOCOLE = 'dbus'
+
+# flags used method/signal declaration (not to be confused with constructor flags)
+    DECLARATION_FLAGS = ['deprecated', 'async']
+
+    ENV_OVERRIDE = "SAT_BRIDGE_CONST_"  # Prefix used to override a constant