rbenv-install-system-wide.sh

#!/bin/bash

# Ubuntu/Debian rbenv system wide installation script
# Forked from https://gist.github.com/1237417

# Installs rbenv system wide on Debian/Ubuntu, also allows single user installs.

# Install pre-requirements
apt-get install build-essential git-core \
    bison openssl libssl-dev libreadline6 libreadline6-dev \
    curl zlib1g zlib1g-dev libssl-dev libyaml-dev libxml2-dev \
    autoconf libc6-dev ncurses-dev automake libtool

# Check if Git is installed
hash git 2>&- || { 
  echo >&2 "Error: Git not found.";
  exit 1;
}

# Check if /usr/local/rbenv already exists
if [[ -d "/usr/local/rbenv" ]]; then
  echo >&2  "Error: /usr/local/rbenv already exists. Aborting installation.";
  exit 1;
fi

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

# Check if clone succesful
if [ $? -gt 0 ]; then
  echo >&2  "Error: Git clone error! See above.";
  exit 1;
fi

# Add rbenv to the path
echo '# rbenv setup - only add RBENV PATH variables if no single user install found' > /etc/profile.d/rbenv.sh
echo 'if [[ ! -d "${HOME}/.rbenv" ]]; then' >> /etc/profile.d/rbenv.sh
echo '  export RBENV_ROOT=/usr/local/rbenv' >> /etc/profile.d/rbenv.sh
echo '  export PATH="$RBENV_ROOT/bin:$PATH"' >> /etc/profile.d/rbenv.sh
echo '  eval "$(rbenv init -)"' >> /etc/profile.d/rbenv.sh
echo 'fi'  >> /etc/profile.d/rbenv.sh

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

# Install ruby-build:
mkdir -p /usr/local/rbenv/plugins

# Check if /usr/local/rbenv/plugins/ruby-build already exists
if [[ -d "/usr/local/rbenv/plugins/ruby-build" ]]; then
  echo >&2  "Error: /usr/local/rbenv/plugins/ruby-build already exists. Aborting installation.";
  exit 1;
fi
git clone https://github.com/sstephenson/ruby-build.git /usr/local/rbenv/plugins/ruby-build

# Install rbenv-sudo
# Check if /usr/local/rbenv/plugins/rbenv-sudo already exists
if [[ -d "/usr/local/rbenv/plugins/rbenv-sudo" ]]; then
  echo >&2  "Error: /usr/local/rbenv/plugins/rbenv-sudo already exists. Aborting installation.";
  exit 1;
fi
git clone https://github.com/dcarley/rbenv-sudo.git /usr/local/rbenv/plugins/rbenv-sudo

echo '---------------------------------'
echo '    rbenv installed system wide to /usr/local/rbenv'
echo '    Remember to restart your shell for the changes to take effect!'
echo '---------------------------------'