#! /bin/sh

set -e

(git branch | grep -q '* master') || {
  echo "Only release from the master branch."
  exit 1
}

init_branch=`git rev-parse --abbrev-ref HEAD`
git branch -D gh-pages
git checkout -b gh-pages
rake generate_preview
git commit -am 'deploy preview'
git push origin gh-pages --force
git checkout $init_branch