Add OSX shards.

Fixes #479

.travis.yml

@@ -1,67 +1,118 @@
-# Enables support for a docker container-based build
-# which should provide faster startup times and beefier
-# "machines".
-# See: http://docs.travis-ci.com/user/workers/container-based-infrastructure/
-sudo: false
-dist: trusty
-
-# TRAVIS_PYTHON_VERSION
-
-cache:
-  directories:
-    - .pyenv_test
-
-language: python
-
-matrix:
-  include:
-    - python: "2.7"
-      env: TOXENV=style
-
-    - python: "2.7"
-      env: TOXENV=isort-check
-
-    - python: "2.7"
-      env: TOXENV=py27
-
-    - python: "2.7"
-      env: TOXENV=py27-subprocess
-
-    - python: "2.7"
-      env: TOXENV=py27-requests
-
-    - python: "2.7"
-      env: TOXENV=py27-requests-cachecontrol
-
-    - python: "3.4"
-      env: TOXENV=py34
-
-    - python: "3.5"
-      env: TOXENV=py35
-
-    - python: "3.6"
-      env: TOXENV=py36
-
-    - python: "3.6"
-      env: TOXENV=py36-requests
-
-    - python: "3.6"
-      env: TOXENV=py36-requests-cachecontrol
-
-    - python: "pypy"
-      env: TOXENV=pypy
-
-    - python: "2.7"
-      env: TOXENV=py27-integration
-
-    - python: "3.6"
-      env: TOXENV=py36-integration
-
-    - python: "pypy"
-      env: TOXENV=pypy-integration
+x-linux-shard: &x-linux-shard
+  os: linux
+  sudo: false
+  dist: trusty
+  language: python
+  cache:
+    directories:
+      - .pyenv_test
+
+x-osx-shard: &x-osx-shard
+  os: osx
+  language: generic
+  cache:
+    directories:
+      - .pyenv_test
+      - ${HOME}/.pyenvpex
+  before_install: |
+    export PYENV_ROOT="${HOME}/.pyenvpex"
+    if [ ! -d "${PYENV_ROOT}" ]; then
+      git clone https://github.com/pyenv/pyenv "${PYENV_ROOT}";
+    fi
+    export PATH="${PYENV_ROOT}/bin:${PATH}"
+    hash -r
+    pyenv install --keep --skip-existing ${PYENV_VERSION}
+    pyenv global ${PYENV_VERSION}
 
 install:
   - pip install -U tox "setuptools>=36"
 
-script:
-  - ./scripts/ci.sh
+matrix:
+  include:
+    - <<: *x-linux-shard
+      python: "2.7"
+      script: ./scripts/ci.sh style
+
+    - <<: *x-linux-shard
+      python: "2.7"
+      script: ./scripts/ci.sh isort-check
+
+    - <<: *x-linux-shard
+      python: "2.7"
+      script: ./scripts/ci.sh py27
+
+    - <<: *x-linux-shard
+      python: "2.7"
+      script: ./scripts/ci.sh py27-subprocess
+
+    - <<: *x-linux-shard
+      python: "2.7"
+      script: ./scripts/ci.sh py27-requests
+
+    - <<: *x-linux-shard
+      python: "2.7"
+      script: ./scripts/ci.sh py27-requests-cachecontrol
+
+    - <<: *x-linux-shard
+      python: "3.4"
+      script: ./scripts/ci.sh py34
+
+    - <<: *x-linux-shard
+      python: "3.5"
+      script: ./scripts/ci.sh py35
+
+    - <<: *x-linux-shard
+      python: "3.6"
+      script: ./scripts/ci.sh py36
+
+    - <<: *x-linux-shard
+      python: "3.6"
+      script: ./scripts/ci.sh py36-requests
+
+    - <<: *x-linux-shard
+      python: "3.6"
+      script: ./scripts/ci.sh py36-requests-cachecontrol
+
+    - <<: *x-linux-shard
+      python: "pypy"
+      script: ./scripts/ci.sh pypy
+
+    - <<: *x-linux-shard
+      python: "2.7"
+      script: ./scripts/ci.sh py27-integration
+
+    - <<: *x-linux-shard
+      python: "3.6"
+      script: ./scripts/ci.sh py36-integration
+
+    - <<: *x-linux-shard
+      python: "pypy"
+      script: ./scripts/ci.sh pypy-integration
+
+    - <<: *x-osx-shard
+      name: TOXENV=py27-requests
+      env:
+        - PYENV_ROOT="${HOME}/.pyenvpex" PATH="${PYENV_ROOT}/shims:${PATH}"
+        - PYENV_VERSION=2.7.15
+      script: ./scripts/ci.sh py27-requests
+
+    - <<: *x-osx-shard
+      name: TOXENV=py36-requests
+      env:
+        - PYENV_ROOT="${HOME}/.pyenvpex" PATH="${PYENV_ROOT}/shims:${PATH}"
+        - PYENV_VERSION=3.6.5
+      script: ./scripts/ci.sh py36-requests
+
+    - <<: *x-osx-shard
+      name: TOXENV=py27-integration
+      env:
+        - PYENV_ROOT="${HOME}/.pyenvpex" PATH="${PYENV_ROOT}/shims:${PATH}"
+        - PYENV_VERSION=2.7.15
+      script: ./scripts/ci.sh py27-integration
+
+    - <<: *x-osx-shard
+      name: TOXENV=py36-integration
+      env:
+        - PYENV_ROOT="${HOME}/.pyenvpex" PATH="${PYENV_ROOT}/shims:${PATH}"
+        - PYENV_VERSION=3.6.5
+      script: ./scripts/ci.sh py36-integration

pex/testing.py

@@ -333,8 +333,10 @@ def ensure_python_distribution(version):
     bootstrap_python_installer(pyenv_root)
 
   if not os.path.exists(interpreter_location):
-    env = {'PYENV_ROOT': pyenv_root,
-           'CONFIGURE_OPTS': '--enable-shared'}
+    env = os.environ.copy()
+    env['PYENV_ROOT'] = pyenv_root
+    if sys.platform.lower() == 'linux':
+      env['CONFIGURE_OPTS'] = '--enable-shared'
     subprocess.check_call([pyenv, 'install', '--keep', version], env=env)
     subprocess.check_call([pip, 'install', '-U', 'pip'])
     subprocess.check_call([pip, 'install', SETUPTOOLS_REQUIREMENT])

scripts/ci.sh

@@ -1,7 +1,11 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 set -euo pipefail
 
+if (( $# == 1 )); then
+  export TOXENV=$1
+fi
+
 if [[ "$TOXENV" == "pypy" ]]; then
   echo "pypy shard detected. invoking workaround for https://github.com/travis-ci/travis-ci/issues/9706"
   tox -e list-tests | grep ^"RUNNABLE" | grep -v "tests/test_integration.py" | awk -F'\t' '{print $NF}' | xargs -L1 tox -v

tests/test_interpreter.py

@@ -76,7 +76,8 @@ def test_interpreter_caching_include_site_extras(self, test_interpreter1):
   @pytest.mark.skipif(IS_PYPY)
   def test_interpreter_caching_path_extras(self):
     python, pip = ensure_python_distribution(self.TEST_INTERPRETER1_VERSION)
-    with temporary_dir() as path_extra:
+    with temporary_dir() as td:
+      path_extra = os.path.realpath(td)
       subprocess.check_call([pip,
                              'install',
                              '--target={}'.format(path_extra),