Per-branch development database with Git and Ruby on Rails.

database.yml

<%
  DEFAULT_DB  = 'myapp_development'
  DB_BRANCHES = %w[ t79 ]
  branch = `git symbolic-ref HEAD 2> /dev/null`.chomp.split('/').last
  dev_db = DB_BRANCHES.include?(branch) ? branch.gsub(/[^a-zA-Z0-9_]/, '') : DEFAULT_DB
  puts "Using dev database: #{dev_db.inspect}"
%>
development:
  database: <%= dev_db %>