Some RVM install time sugar

rvm_sugar.sh

#!/usr/bin/env bash

# ## Installing RVM as a User
#
#   bash < <( curl -s https://rvm.beginrescueend.com/install/rvm )
#   bash < <( curl -L http://bit.ly/rvm_sugar )
#   [[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm"
#
# ## Installing RVM System Wide (become the root user)
#
#   bash < <( curl -s https://rvm.beginrescueend.com/install/rvm )
#   bash < <( curl -L http://bit.ly/rvm_sugar )
#   [[ -s "/usr/local/rvm/scripts/rvm" ]] && . /usr/local/rvm/scripts/rvm
#
# ## Installing Rubies: An Example
#
#   rvm 1.9.2,1.8.7,jruby,rbx,ree install && rvm 1.9.2 --default
#

global_gems=( "bundler -v1.1.pre.5" awesome_print wirble interactive_editor powder )
default_gems=( chef vagrant homesick github gollum creole rdiscount )

echo "== loading in rvm environment"
if [[ -s "$HOME/.rvm/scripts/rvm" ]]; then
  source "$HOME/.rvm/scripts/rvm"
elif [[ -s "/usr/local/rvm/scripts/rvm" ]]; then
  source "/usr/local/rvm/scripts/rvm"
fi

rvmrc="$HOME/.rvmrc"
rvm_create_gemsets="rvm_gemset_create_on_use_flag"
if [[ ! -f "$rvmrc" ]] || ! grep -q "^${rvm_create_gemsets}=" "$rvmrc"; then
  echo "== ${rvmrc}: create gemsets automatically as needed"
  echo "${rvm_create_gemsets}=1" >> "$rvmrc"
fi

gemrc="$HOME/.gemrc"
if [[ ! -f "$gemrc" ]]; then
  echo "== ${gemrc}: skip ri/rdoc when installing gems"
  cat > "$gemrc" <<END_OF_GEMRC
---
gem: --no-ri --no-rdoc
END_OF_GEMRC
fi

aprc="$HOME/.aprc"
if [[ ! -f "$aprc" ]]; then
  echo "== ${aprc}: modify awesome_print colors to work with black background"
  cat > "$aprc" <<END_OF_APRC
AwesomePrint.defaults = {
  :indent => 2,
  :color => {
    :bigdecimal  => :cyan,
    :fixnum      => :cyan,
    :float       => :cyan
  }
}
END_OF_APRC
fi

irbrc="$HOME/.irbrc"
if [[ ! -f "$irbrc" ]]; then
  echo "== ${irbrc}: add history/load in awesome_print (irbrc start point)"
  cat > "$irbrc" <<END_OF_IRBRC
require "rubygems"
require "irb/ext/save-history"
require "ap"

IRB.conf[:SAVE_HISTORY] = 1000
IRB.conf[:HISTORY_FILE] = "#{ENV['HOME']}/.irb-save-history"

IRB::Irb.class_eval do
  def output_value
    ap @context.last_value
  end
end
END_OF_IRBRC
fi

global_dot_gems="${rvm_path}/gemsets/global.gems"
echo "== ${global_dot_gems}: adding global gems for new rubies..."
for gem in "${global_gems[@]}"; do
  if ! grep -q "^$gem" "$global_dot_gems"; then
    echo ">>>> adding \"${gem}\""
    echo "$gem" >> "$global_dot_gems"
  fi
done; unset gem
echo "== ${global_dot_gems}: closed."

default_dot_gems="${rvm_path}/gemsets/default.gems"
echo "== ${default_dot_gems}: adding default gems for new rubies..."
for gem in "${default_gems[@]}"; do
  if ! grep -q "^$gem" "$default_dot_gems"; then
    echo ">>>> adding \"${gem}\""
    echo "$gem" >> "$default_dot_gems"
  fi
done; unset gem
echo "== ${default_dot_gems}: closed."