1 files changed, 50 insertions, 0 deletions
diff --git a/lib/bundler/match_metadata.rb b/lib/bundler/match_metadata.rb
new file mode 100644
index 0000000000..92aeb2e893
--- /dev/null
+++ b/lib/bundler/match_metadata.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+module Bundler
+  module MatchMetadata
+    def matches_current_metadata?
+      matches_current_ruby? && matches_current_rubygems?
+    end
+
+    def matches_current_ruby?
+      @required_ruby_version.satisfied_by?(Gem.ruby_version)
+    end
+
+    def matches_current_rubygems?
+      @required_rubygems_version.satisfied_by?(Gem.rubygems_version)
+    end
+
+    def matches_current_metadata_with_overrides?(overrides)
+      matches_current_ruby_with_overrides?(overrides) && matches_current_rubygems_with_overrides?(overrides)
+    end
+
+    def matches_current_ruby_with_overrides?(overrides)
+      effective_required_version(@required_ruby_version, :required_ruby_version, overrides).satisfied_by?(Gem.ruby_version)
+    end
+
+    def matches_current_rubygems_with_overrides?(overrides)
+      effective_required_version(@required_rubygems_version, :required_rubygems_version, overrides).satisfied_by?(Gem.rubygems_version)
+    end
+
+    def expanded_dependencies
+      runtime_dependencies + [
+        metadata_dependency("Ruby", @required_ruby_version),
+        metadata_dependency("RubyGems", @required_rubygems_version),
+      ].compact
+    end
+
+    def metadata_dependency(name, requirement)
+      return if requirement.nil? || requirement.none?
+
+      Gem::Dependency.new("#{name}\0", requirement)
+    end
+
+    private
+
+    def effective_required_version(requirement, field, overrides)
+      return requirement if overrides.nil? || overrides.empty?
+      override = Override.find_for(overrides, name, field)
+      override ? override.apply_to(requirement) : requirement
+    end
+  end
+end