Use rbenv and ruby-build to install Ruby.

install_ruby.sh

#!/bin/bash
#
# Ruby Installation Script for OpenProject
# https://www.openproject.org/docs/development/development-environment-ubuntu/
#
# This script installs Ruby using rbenv and ruby-build on Ubuntu.
# It assumes the user has administrative privileges and uses Bash shell.


# Install dependencies required for rbenv and Ruby
echo "Installing required packages..."
sudo apt-get update && sudo apt-get install -y \
  git-core curl zlib1g-dev build-essential \
  libssl-dev libreadline-dev libyaml-dev libsqlite3-dev \
  sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev \
  software-properties-common libffi-dev

# Clone rbenv repository into the home directory
echo "Cloning rbenv into ~/.rbenv..."
git clone https://github.com/rbenv/rbenv.git ~/.rbenv

# Add rbenv to PATH and initialize it on shell startup
echo "Setting up rbenv..."
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' | tee -a ~/.bashrc ~/.zshrc
echo 'eval "$(rbenv init -)"' | tee -a ~/.bashrc ~/.zshrc

source ~/.bashrc

# Clone ruby-build as a rbenv plugin
echo "Cloning ruby-build..."
git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build

# Install Ruby using rbenv
echo "Installing Ruby version 3.2.3..."
rbenv install 3.2.3
rbenv global 3.2.3
rbenv rehash

# Verify the Ruby installation
echo "Ruby installation complete. Verifying installation..."
ruby -v
echo "Installation script finished. Ruby version $(ruby -v) installed successfully."