Introduce pyproject.toml

Using pyproject.toml, defined in PEP518, allows us to have
an isolated build environment, ensuring that Cython can be installed
before calling setup.py in tox. This allows us to use cython helpers
in the setup.py script.

This is a prerequisite for introducing Cython in the codebase

1 files changed, 4 insertions, 2 deletions

diff --git a/setup.py b/setup.py
index 267ca6fb4..0caf7bae9 100755
--- a/setup.py
+++ b/setup.py
@@ -19,13 +19,15 @@
 #        Tristan Van Berkom <tristan.vanberkom@codethink.co.uk>
 
 import os
+from pathlib import Path
 import re
 import shutil
 import subprocess
 import sys
-import versioneer
 
-from pathlib import Path
+# Add local directory to the path, in order to be able to import versioneer
+sys.path.append(os.path.dirname(__file__))
+import versioneer  # noqa
 
 
 ##################################################################