1 files changed, 25 insertions, 10 deletions
diff --git a/lib/rubygems/resolver/specification.rb b/lib/rubygems/resolver/specification.rb
index 44989d39ae..d2098ef0e2 100644
--- a/lib/rubygems/resolver/specification.rb
+++ b/lib/rubygems/resolver/specification.rb
@@ -1,11 +1,11 @@
 # frozen_string_literal: true
+
 ##
 # A Resolver::Specification contains a subset of the information
 # contained in a Gem::Specification.  Only the information necessary for
 # dependency resolution in the resolver is included.
 
 class Gem::Resolver::Specification
-
   ##
   # The dependencies of the gem for this specification
 
@@ -45,6 +45,16 @@ class Gem::Resolver::Specification
   attr_reader :version
 
   ##
+  # The required_ruby_version constraint for this specification.
+
+  attr_reader :required_ruby_version
+
+  ##
+  # The required_ruby_version constraint for this specification.
+
+  attr_reader :required_rubygems_version
+
+  ##
   # Sets default instance variables for the specification.
 
   def initialize
@@ -54,6 +64,8 @@ class Gem::Resolver::Specification
     @set          = nil
     @source       = nil
     @version      = nil
+    @required_ruby_version = Gem::Requirement.default
+    @required_rubygems_version = Gem::Requirement.default
   end
 
   ##
@@ -81,14 +93,10 @@ class Gem::Resolver::Specification
   # After installation #spec is updated to point to the just-installed
   # specification.
 
-  def install options = {}
-    require 'rubygems/installer'
+  def install(options = {})
+    require_relative "../installer"
 
-    destination = options[:install_dir] || Gem.dir
-
-    Gem.ensure_gem_subdirectories destination
-
-    gem = source.download spec, destination
+    gem = download options
 
     installer = Gem::Installer.at gem, options
 
@@ -97,15 +105,22 @@ class Gem::Resolver::Specification
     @spec = installer.install
   end
 
+  def download(options)
+    dir = options[:install_dir] || Gem.dir
+
+    Gem.ensure_gem_subdirectories dir
+
+    source.download spec, dir
+  end
+
   ##
   # Returns true if this specification is installable on this platform.
 
   def installable_platform?
-    Gem::Platform.match spec.platform
+    Gem::Platform.match_spec? spec
   end
 
   def local? # :nodoc:
     false
   end
 end
-