Install libevent 1.4 with Homebrew on OS X

install-libevent1.sh

#!/bin/bash

# Enter the Homebrew root directory.
cd `brew --prefix`

# Clean out all previous libevent installs.
echo "Removing any existing installations..."
brew uninstall libevent
brew cleanup libevent

# Checkout the revision for 1.4.14b.
echo "Installing version 1.4.14b..." 
git checkout fc30989 Library/Formula/libevent.rb
brew install libevent

# Reset to keep the brew repo clean.
echo "Cleaning up..."
git checkout HEAD Library/Formula/libevent.rb

Paste this into your terminal to run the script ¹:

curl https://gist.github.com/berryp/9099803 | sh

^{1. Make sure you trust the source before blindly running code from a URL.}