From 1a22afc0c9d7e510894295ff03bd0a544cd1bb75 Mon Sep 17 00:00:00 2001
From: Marius Gedminas <marius@gedmin.as>
Date: Fri, 26 Aug 2016 10:25:53 +0300
Subject: [PATCH] Ask tox to upgrade pip

Works around the terrible mess that is the state of Python packaging:

- latest virtualenv doesn't work with Python 3.5 on Windows
  (https://github.com/pypa/virtualenv/issues/796)

- virtualenv-rewrite that I use instead works with Python 3.5 but
  bundles an outdated version of pip

- old version of pip doesn't find the right binary wheels for lxml
  (because the ABI tag changed) and tries to compile, which fails
---
 tox.ini | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tox.ini b/tox.ini
index bc0a155..6ee6c42 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,10 +18,14 @@ commands =
 # Install ZEO because zodbbrowser depends on ZODB3 which depends on ZEO >=
 # 4.0.0dev which tells pip that prereleases are fine, which makes it go and
 # download ZEO 5.0.0a2, which is broken on windows, somehow.
+# Upgrade pip because otherwise we can't find lxml wheels because the ABI tag
+# format changed or something.
 deps =
     zope.testrunner
     persistent
     ZEO
+    pip
+install_command = python -m pip install -U {opts} {packages}
 
 [testenv:py]
 commands =