One file, no destination env

lib/kamal/configuration/secrets.rb

@@ -1,29 +1,18 @@
 class Kamal::Configuration::Secrets
-  attr_reader :secret_file, :destination
+  attr_reader :secrets_file
 
   def initialize(destination: nil)
-    @destination = destination
-    @secret_file = (destination ? [ ".kamal/secrets.#{destination}", ".kamal/secrets" ] : [ ".kamal/secrets" ])
-      .find { |file| File.exist?(file) }
+    @secrets_file = [ *(".kamal/secrets.#{destination}" if destination), ".kamal/secrets" ].find { |f| File.exist?(f) }
   end
 
   def [](key)
-    @secrets ||= load
+    @secrets ||= secrets_file ? Dotenv.parse(*secrets_file) : {}
     @secrets.fetch(key)
   rescue KeyError
-    if secret_file
-      raise Kamal::ConfigurationError, "Secret '#{key}' not found in #{secret_file}"
+    if secrets_file
+      raise Kamal::ConfigurationError, "Secret '#{key}' not found in #{secrets_file}"
     else
-      raise Kamal::ConfigurationError, "Secret '#{key}' not found, no secret file provided"
+      raise Kamal::ConfigurationError, "Secret '#{key}' not found, no secret files provided"
     end
   end
-
-  private
-    def load
-      original_env = ENV.to_hash
-      ENV["KAMAL_DESTINATION"] = destination if destination
-      secret_file ? Dotenv.parse(*secret_file) : {}
-    ensure
-      ENV.replace(original_env)
-    end
 end