migrations.rake
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	load File.expand_path("../set_rails_env.rake", __FILE__)

	namespace :deploy do

	desc 'Runs rake db:migrate if migrations are set'
	task :migrate => [:set_rails_env] do
	on primary fetch(:migration_role) do
	conditionally_migrate = fetch(:conditionally_migrate)
	info '[deploy:migrate] Checking changes in /db/migrate' if conditionally_migrate
	if conditionally_migrate && test("diff -q #{release_path}/db/migrate #{current_path}/db/migrate")
	info '[deploy:migrate] Skip `deploy:migrate` (nothing changed in db/migrate)'
	else
	info '[deploy:migrate] Run `rake db:migrate`'
	within release_path do
	with rails_env: fetch(:rails_env) do
	execute :rake, "db:migrate"
	end
	end
	end
	end
	end

	after 'deploy:updated', 'deploy:migrate'
	end

	namespace :load do
	task :defaults do
	set :conditionally_migrate, fetch(:conditionally_migrate, false)
	set :migration_role, fetch(:migration_role, :db)
	end
	end