rbenv install ruby 1.9.3-p327 on Ubuntu 12.04 LTS for chef bootstrap

rbenv.sh

# rbenv setup
export RBENV_ROOT=/usr/local/rbenv
export PATH="$RBENV_ROOT/bin:$PATH"
eval "$(rbenv init -)"

ubuntu12.04-rbenv.erb

#
# $ curl -s https://raw.github.com/gist/2251684/ubuntu12.04-rbenv.erb > ~/.chef/bootstrap/ubuntu12.04-rbenv.erb
# $ knife ec2 server create -x ubuntu -d ubuntu12.04-rbenv -i security.pem
#

bash -c '

# export rbenv to path
export RBENV_ROOT=/usr/local/rbenv
export PATH=/usr/local/rbenv/shims:/usr/local/rbenv/bin:$PATH

<%= "export http_proxy=\"#{knife_config[:bootstrap_proxy]}\"" if knife_config[:bootstrap_proxy] -%>

if [ ! -d /usr/local/rbenv ]; then

# Update, upgrade and install development tools:
apt-get update
apt-get -y upgrade
apt-get -y install build-essential git-core curl \
                   libssl-dev \
                   libyaml-dev \
                   libsqlite3-dev \
                   libreadline-dev \
                   zlib1g zlib1g-dev \
                   libmysqlclient-dev \
                   libcurl4-openssl-dev \
                   libxslt-dev libxml2-dev

# Install rbenv
git clone git://github.com/sstephenson/rbenv.git /usr/local/rbenv

# Add rbenv to the path:
curl -s https://raw.github.com/gist/2251684/rbenv.sh > /etc/profile.d/rbenv.sh

chmod +x /etc/profile.d/rbenv.sh
source   /etc/profile.d/rbenv.sh

# Install ruby-build:
pushd /tmp
  git clone git://github.com/sstephenson/ruby-build.git
  cd ruby-build
  ./install.sh
popd

# Install Ruby 1.9.3-p327:
rbenv install  1.9.3-p327
rbenv global   1.9.3-p327

# Rehash:
rbenv rehash

# Production install gems skipping ri and rdoc
echo "gem: --no-ri --no-rdoc" >> /root/.gemrc

cat << EOF > /usr/local/bin/rbenv-chef-client
#!/bin/bash
export RBENV_ROOT=/usr/local/rbenv
export PATH=/usr/local/rbenv/shims:/usr/local/rbenv/bin:$PATH
chef-client
rbenv rehash
EOF
chmod +x /usr/local/bin/rbenv-chef-client

fi

gem install ohai --no-rdoc --no-ri
gem install chef --no-rdoc --no-ri <%= bootstrap_version_string %>

# Rehash:
rbenv rehash

mkdir -p /etc/chef

(
cat <<'EOP'
<%= validation_key %>
EOP
) > /tmp/validation.pem
awk NF /tmp/validation.pem > /etc/chef/validation.pem
rm /tmp/validation.pem

<% if @chef_config[:encrypted_data_bag_secret] -%>
(
cat <<'EOP'
<%= encrypted_data_bag_secret %>
EOP
) > /tmp/encrypted_data_bag_secret
awk NF /tmp/encrypted_data_bag_secret > /etc/chef/encrypted_data_bag_secret
rm /tmp/encrypted_data_bag_secret
<% end -%>

(
cat <<'EOP'
<%= config_content %>
EOP
) > /etc/chef/client.rb

(
cat <<'EOP'
<%= { "run_list" => @run_list }.to_json %>
EOP
) > /etc/chef/first-boot.json

/usr/local/rbenv/shims/chef-client -j /etc/chef/first-boot.json -E _default

'