Auto merge of #5071 - bundler:seg-use-gemdeps, r=indirect

[RubyGemsIntegration] Add a single method for #use_gemdeps

Closes #5040
\c @indirect

2 files changed, 36 insertions, 0 deletions

diff --git a/lib/bundler/gemdeps.rb b/lib/bundler/gemdeps.rb
new file mode 100644
index 0000000000..8595b8c7ea
--- /dev/null
+++ b/lib/bundler/gemdeps.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+module Bundler
+  class Gemdeps
+    def initialize(runtime)
+      @runtime = runtime
+    end
+
+    def requested_specs
+      @runtime.requested_specs
+    end
+
+    def specs
+      @runtime.specs
+    end
+
+    def dependencies
+      @runtime.dependencies
+    end
+
+    def current_dependencies
+      @runtime.current_dependencies
+    end
+
+    def requires
+      @runtime.requires
+    end
+  end
+end
diff --git a/lib/bundler/rubygems_integration.rb b/lib/bundler/rubygems_integration.rb
index 90da0b4645..488aa8b9a4 100644
--- a/lib/bundler/rubygems_integration.rb
+++ b/lib/bundler/rubygems_integration.rb
@@ -751,6 +751,14 @@ module Bundler
           end.map(&:to_spec)
         end
       end
+
+      def use_gemdeps(gemfile)
+        ENV["BUNDLE_GEMFILE"] ||= File.expand_path(gemfile)
+        runtime = Bundler.setup
+        Bundler.ui = nil
+        activated_spec_names = runtime.requested_specs.map(&:to_spec).sort_by(&:name)
+        [Gemdeps.new(runtime), activated_spec_names]
+      end
     end
   end