Task to add 'parameters:' to an empty parameters file

deploy.rb

#task to add 'parameters:' to an empty parameters file 
task :fix_empty_parameters_yml 
do
  parameters_path = "app/config/parameters.yml" 
  run "LEN=$(cat #{shared_path}/#{parameters_path} | wc -c); if [ $LEN -eq 0 ] ; then echo \"parameters:\" > #{shared_path}/#{parameters_path} ; fi" 
end

#run the parameters fix task before composer kicks off 
before "symfony:composer:install", "fix_empty_parameters_yml"