Join files to Rails.root at load time

lib/dotenv/rails.rb

@@ -18,7 +18,7 @@
 module Dotenv
   # Rails integration for using Dotenv to load ENV variables from a file
   class Rails < ::Rails::Railtie
-    delegate :files, :files=, :overwrite, :overwrite=, :autorestore, :autorestore=, :logger, :logger=, to: "config.dotenv"
+    delegate :files=, :overwrite, :overwrite=, :autorestore, :autorestore=, :logger, :logger=, to: "config.dotenv"
 
     def initialize
       super()
@@ -27,15 +27,20 @@ def initialize
         logger: Dotenv::ReplayLogger.new,
         overwrite: false,
         files: [
-          root.join(".env.#{env}.local"),
-          (root.join(".env.local") unless env.test?),
-          root.join(".env.#{env}"),
-          root.join(".env")
+          ".env.#{env}.local",
+          (".env.local" unless env.test?),
+          ".env.#{env}",
+          ".env"
         ].compact,
         autorestore: env.test?
       )
     end
 
+    # The list of files to load, joined with Rails.root
+    def files
+      config.dotenv.files.map { |file| root.join(file) }
+    end
+
     # Public: Load dotenv
     #
     # This will get called during the `before_configuration` callback, but you

spec/dotenv/rails_spec.rb

@@ -65,6 +65,17 @@
         ]
       )
     end
+
+    it "returns the relatives paths to Rails.root" do
+      expect(Dotenv::Rails.files.last).to eql(fixture_path(".env"))
+      allow(Rails).to receive(:root).and_return(Pathname.new("/tmp"))
+      expect(Dotenv::Rails.files.last.to_s).to eql("/tmp/.env")
+    end
+
+    it "returns absolute paths unchanged" do
+      Dotenv::Rails.files = ["/tmp/.env"]
+      expect(Dotenv::Rails.files).to eql([Pathname.new("/tmp/.env")])
+    end
   end
 
   it "watches other loaded files with Spring" do