git post-update hook for building Rails app pushed over ssh into a bare VM

post-update

#!/usr/bin/sh
project_name="project-name-here"
project_root="${HOME}"

refname=${1}
rev=$(git rev-parse --short ${1})
this_release="${project_root}/${project_name}-${rev}"

mkdir -p ${this_release}

git archive ${refname} | tar -x -C ${this_release}

echo "${project_name}-${rev}" > "${this_release}/.ruby-gemset"

pushd ${this_release}
rvm gemset globalcache enable
rvm-shell -c "gem install bundler"
rvm-shell -c "bundle config set --local without 'development test'"
rvm-shell -c "bundle install"

cp --recursive "${project_root}/${project_name}/public/assets" "${this_release}/public/"
rvm-shell -c "bundle exec rake assets:precompile"
rvm-shell -c "rails assets:clean[5]"
popd

ln -sfn ${this_release} "${project_root}/${project_name}"

exit 0