add OS-X workarounds for Travis

1 files changed, 24 insertions, 2 deletions

diff --git a/.travis.yml b/.travis.yml
index 799848a..0ec6295 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -47,11 +47,33 @@ matrix:
     sudo: false
     python: 'pypy3'
   - os: osx
-    language: objective-c
+    language: generic
     env: PYENV_VERSION=2.7.12
   - os: osx
-    language: objective-c
+    language: generic
     env: PYENV_VERSION=3.5.2
+before_install: |
+  if [ "$TRAVIS_OS_NAME" == "osx" ]; then
+    brew update
+    # Per the `pyenv homebrew recommendations <https://github.com/yyuu/pyenv/wiki#suggested-build-environment>`_.
+    brew install openssl readline
+    # See https://docs.travis-ci.com/user/osx-ci-environment/#A-note-on-upgrading-packages.
+    # I didn't do this above because it works and I'm lazy.
+    brew outdated pyenv || brew upgrade pyenv
+    # virtualenv doesn't work without pyenv knowledge. venv in Python 3.3
+    # doesn't provide Pip by default. So, use `pyenv-virtualenv <https://github.com/yyuu/pyenv-virtualenv/blob/master/README.md>`_.
+    brew install pyenv-virtualenv
+    pyenv install $PYTHON
+    # I would expect something like ``pyenv init; pyenv local $PYTHON`` or
+    # ``pyenv shell $PYTHON`` would work, but ``pyenv init`` doesn't seem to
+    # modify the Bash environment. ??? So, I hand-set the variables instead.
+    export PYENV_VERSION=$PYTHON
+    export PATH="/Users/travis/.pyenv/shims:${PATH}"
+    pyenv-virtualenv venv
+    source venv/bin/activate
+    # A manual check that the correct version of Python is running.
+    python --version
+  fi
 install:
   - pip install codecov
   - pip install -r requirements.txt