One Command for Bumping Ruby Versions when using rbenv

bump

#/usr/bin/env bash

echo "---"

# Exit on error
set -o errexit

# Get the version from the .ruby-version file
target_ruby_version=$(cat .ruby-version)

# Get the full version from the local ruby
current_ruby_version=`ruby -e 'puts RUBY_VERSION'`

if [ "$target_ruby_version" != "$current_ruby_version" ]; then
  echo "Upgrading Ruby from $current_ruby_version to $target_ruby_version"

  # Make sure the latest Ruby versions are present and available
  arch -arm64 brew update && arch -arm64 brew upgrade ruby-build

  # Install the version specified in the .ruby-version file
  rbenv install --skip-existing $target_ruby_version

  if [ -f Gemfile.lock ]; then
    # Wipe out the Gemfile.lock file
    # Note: This is somewhat aggressive, but it helps expose issues sooner.
    #   With projects that have a more brittle set of Gems, it may be best to
    #   take a more forgiving approach.
    #
    # When using this, running `bundle update` below instead of `bundle install`
    #   as another way to try an aggressive update. Really only advised for
    #   projects that are obssessive about staying current on dependencies.
    rm Gemfile.lock
  fi
else
  echo "Ruby version is current at $current_ruby_version"
fi

echo "---"

# Update Bundler to the latest
bundle update --bundler

# Re-bundle and ensure linux is added
bundle install
bundle lock --add-platform x86_64-linux