Support flatpak build

Use 3 levels for application ID.
Use XDG_RUNTIME_DIR as TMPDIR to share file outside the sandbox

issue11250
review390051002

bin/tryton

@@ -41,6 +41,11 @@ if hasattr(sys, 'frozen'):
     if sys.platform == 'darwin':
         sys.argv = [a for a in sys.argv if not a.startswith('-psn_')]
 
+if os.environ.get('FLATPAK_ID') and os.environ.get('XDG_RUNTIME_DIR'):
+    # Set $TMPDIR to share files outside the sandbox
+    os.environ['TMPDIR'] = os.path.join(
+        os.environ.get('XDG_RUNTIME_DIR'), 'app', os.environ.get('FLATPAK_ID'))
+
 
 # Disable dbusmenu to show second menu in tabs
 os.environ['UBUNTU_MENUPROXY'] = '0'

tryton/client.py

@@ -78,7 +78,7 @@ def main():
             'database': CONFIG['login.db'],
             }
         server = hashlib.md5(server.encode('utf-8')).hexdigest()
-        application_id = 'org.tryton._' + server
+        application_id = 'org.tryton.Tryton._' + server
         app = gui.Main(
             application_id=application_id,
             flags=Gio.ApplicationFlags.HANDLES_COMMAND_LINE)