Adds automated build for OSX re #380

Signed-off-by: Ed Robinson <ed.robinson@reevoo.com>

.travis.yml

@@ -1,10 +1,18 @@
-sudo: required
 
-services:
-  - docker
+matrix:
+  include:
+  -  os: linux
+     sudo: required
+     services:
+       - docker
+  -  os: osx
 
 notifications:
   email: false
 
+install:
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install gpgme ; fi
+
 script:
-  - make check
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]];   then hack/travis_osx.sh ; fi
+  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then make check ; fi

hack/travis_osx.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+set -e
+
+export GOPATH=$(pwd)/_gopath
+_projectatomic="${GOPATH}/src/github.com/projectatomic"
+mkdir -vp ${_projectatomic}
+ln -vsf $(pwd) ${_projectatomic}/skopeo
+
+cd ${_projectatomic}/skopeo
+make validate-local test-unit-local binary-local BUILDTAGS=containers_image_ostree_stub