config.rake

read_options = ->(env:) do
  path = File.join(Dir.getwd, "srv", env, "options.yml")
  Ryo.from(YAML.load_file(path))
end

task "config:build", :env do |task, args|
  options = read_options.call(**args)
  b = binding.tap { |b| Ryo.each(options) { |k,v| b.local_variable_set(k, v) } }
  glob = File.join(Dir.getwd, "srv", args[:env], "etc", "*.conf.erb")
  etc_files = Dir.glob(glob)
  etc_files.each do |file|
    File.binwrite File.join(File.dirname(file), File.basename(file, ".erb")),
                  ERB.new(File.binread(file), trim_mode: "-").result(b)
  end
end