/usr/lib/python2.7/dist-packages/charmtools/templates/chef/files/cookbooks/juju-helpers/ is in charm-tools 2.1.2-0ubuntu4.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/charmtools/templates/chef/files/cookbooks/juju-helpers/definitions//
/usr/lib/python2.7/dist-packages/charmtools/templates/chef/files/cookbooks/juju-helpers/definitions/juju_port.rb
/usr/lib/python2.7/dist-packages/charmtools/templates/chef/files/cookbooks/juju-helpers/definitions/relation_set.rb
/usr/lib/python2.7/dist-packages/charmtools/templates/chef/files/cookbooks/juju-helpers/libraries/
/usr/lib/python2.7/dist-packages/charmtools/templates/chef/files/cookbooks/juju-helpers/libraries/juju.rb
/usr/lib/python2.7/dist-packages/charmtools/templates/chef/files/cookbooks/juju-helpers/libraries/juju//
/usr/lib/python2.7/dist-packages/charmtools/templates/chef/files/cookbooks/juju-helpers/libraries/juju/juju_helpers.rb
/usr/lib/python2.7/dist-packages/charmtools/templates/chef/files/cookbooks/juju-helpers/libraries/juju/juju_helpers_dev.rb
/usr/lib/python2.7/dist-packages/charmtools/templates/chef/files/cookbooks/juju-helpers/metadata.rb