Database per branch - Rails

copy_db.sh

parent=$1
if [ -z $1 ]; then
  echo "Parent db is empty"
  echo "Using master"
  parent="development_master"
fi

repo=`git rev-parse --abbrev-ref HEAD`
db=$(echo "development_$repo" | tr "-" "_")
echo 'Creating dev db'
createdb -U user -p 5433 -h localhost -T $parent $db
echo 'Done!'

database.yml

<%
  branch = `git rev-parse --abbrev-ref HEAD`.strip rescue nil
  branch_spec = (branch.nil? ? "" : "_#{branch}").underscore.gsub(/[\.\/\-]/, '_')
%>

development:
  <<: *default
  database: app_development<%= branch_spec%>