setup.py: fix support for installing without root prefix

8bce5a1 broke installation without --root= because self.root is None in that
case.

Make sure we're using a string for len() even if self.root is None.

1 files changed, 1 insertions, 1 deletions

diff --git a/setup.py b/setup.py
index 153f084..c3f6a12 100755
--- a/setup.py
+++ b/setup.py
@@ -74,7 +74,7 @@ class install_dbus(Command):  # pylint: disable=C0103,R0904
     def process_template(self, template_path, service_path):
         """Copy template_path to service_path, replacing format specifiers.
         """
-        variables = {'install_dir': self.install_dir[len(self.root):]}
+        variables = {'install_dir': self.install_dir[len(self.root or ''):]}
         with file(service_path, 'w') as service_file:
             for line in file(template_path):
                 service_file.write(line % variables)