1 files changed, 17 insertions, 0 deletions
diff --git a/lib/bundler/ruby_dsl.rb b/lib/bundler/ruby_dsl.rb
new file mode 100644
index 0000000000..a410b7f3d7
--- /dev/null
+++ b/lib/bundler/ruby_dsl.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+module Bundler
+  module RubyDsl
+    def ruby(*ruby_version)
+      options = ruby_version.last.is_a?(Hash) ? ruby_version.pop : {}
+      ruby_version.flatten!
+      raise GemfileError, "Please define :engine_version" if options[:engine] && options[:engine_version].nil?
+      raise GemfileError, "Please define :engine" if options[:engine_version] && options[:engine].nil?
+
+      if options[:engine] == "ruby" && options[:engine_version] &&
+          ruby_version != Array(options[:engine_version])
+        raise GemfileEvalError, "ruby_version must match the :engine_version for MRI"
+      end
+      @ruby_version = RubyVersion.new(ruby_version, options[:patchlevel], options[:engine], options[:engine_version])
+    end
+  end
+end