jpennell

brew update
brew versions FORMULA
cd `brew --prefix`
git checkout HASH Library/Formula/FORMULA.rb  # use output of "brew versions"
brew install FORMULA
brew switch FORMULA VERSION
git checkout -- Library/Formula/FORMULA.rb    # reset formula

## Example: Using Subversion 1.6.17
#

jpennell

This is a general-purpose function to ask Yes/No questions in Bash, either with or without a default answer. It keeps repeating the question until it gets a valid answer.