ERB template for git-branch aware database.yml (development/test only)

database.yml.erb

<%
  # if you need to work on a branch with a different schema, use
  # git config --bool branch.the-new-branch.database true
  
  # http://mislav.uniqpath.com/rails/branching-the-database-along-with-your-code/
  branch = `git symbolic-ref HEAD 2>/dev/null`.chomp.sub('refs/heads/', '')
  suffix = `git config --bool branch.#{branch}.database`.chomp == 'true' ? "_#{branch}" : ""
%>

common: &common
  adapter: mysql2
  encoding: utf8
  reconnect: false
  pool: 5
  username: root
  
development:
  <<: *common
  database: app_dev<%= suffix %>
  
test:
  <<: *common
  database: app_test<%= suffix %>