Managing different chef environments using git branches

knife-config.staging.rb

log_level                :debug
log_location             STDOUT
validation_client_name   'channels-staging-validator'
validation_key           './.chef/channels-staging-validator.pem'
chef_server_url          'https://api.opscode.com/organizations/channels-staging'  
cache_options( :path => './.chef/channels-staging-checksums' )

knife.rb

# Default to 'QA' environment
validation_client_name   'channels-qa-validator'
validation_key           './.chef/channels-qa-validator.pem'
chef_server_url          'https://api.opscode.com/organizations/channels-qa'  
cache_options( :path => './.chef/channels-qa-checksums' )


log_level                :debug
log_location             STDOUT
node_name                'apsoto'
client_key               '/Users/asoto/.chef/apsoto.pem'
cache_type               'BasicFile'
cookbook_path           './cookbooks','./site-cookbooks'

# Read in any environment specific config
branch_cmd = %q{git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/\1/'}
branch = `#{branch_cmd}`.strip
environment_config = File.join(File.dirname(__FILE__), "knife-config.#{branch}.rb")

if File.exists?(environment_config)
  eval(IO.read(environment_config))
  Chef::Log.info("Loaded environment specific configuration from #{environment_config}")
else
  Chef::Log.info("No environment specific config file found for branch #{branch}")
end