#!/bin/bash
# requires that you use "set :deploy_via, :remote_cache" in deploy.rb

while read oldrev newrev ref
do
        if [ "$ref" = "refs/heads/master" ] ; then
                echo "Master branch pushed, deploying to staging"
                # seams to be set to "." for hooks, unset to make things more normal
                unset GIT_DIR
                # deploy path, where "current", "releases", "shared" etc are
                DEPLOYDIR="/home/user/deploy/staging"
                # default path for :deploy_via :remote_cache is shared/cached-copy
                cd "$DEPLOYDIR/shared/cached-copy"
                # update cache to pushed revision, will be done by capistrano too
                git fetch origin && git fetch --tags origin && git reset --hard "$newrev"
                # load rvm
                source ~/.rvm/scripts/rvm
                rvm use 1.9.2
                # make sure we have a .bundle directory to make bundle exec happy.
                # lend the one from current deployed version
                cp -a "$DEPLOYDIR/current/.bundle" .
                # run capistrano
                # if you use deploy:migrations instead of deploy you should probably add
                # after "deploy:migrations", "deploy:cleanup"
                # to your deploy.rb
                bundle exec cap staging deploy:migrations
        fi
done