[rubygems/rubygems] Fix issue with extensions not compiling properly using inline gemfile

https://github.com/rubygems/rubygems/commit/fa6e6ea95c

lib/bundler/inline.rb

@@ -38,9 +38,8 @@ def gemfile(install = false, options = {}, &gemfile)
   Bundler.ui = ui
   raise ArgumentError, "Unknown options: #{opts.keys.join(", ")}" unless opts.empty?
 
-  begin
+  Bundler.with_unbundled_env do
     Bundler.instance_variable_set(:@bundle_path, Pathname.new(Gem.dir))
-    old_gemfile = ENV["BUNDLE_GEMFILE"]
     Bundler::SharedHelpers.set_env "BUNDLE_GEMFILE", "Gemfile"
 
     Bundler::Plugin.gemfile_install(&gemfile) if Bundler.feature_flag.plugins?
@@ -65,11 +64,9 @@ def gemfile(install = false, options = {}, &gemfile)
       runtime = Bundler::Runtime.new(nil, definition)
       runtime.setup.require
     end
-  ensure
-    if old_gemfile
-      ENV["BUNDLE_GEMFILE"] = old_gemfile
-    else
-      ENV["BUNDLE_GEMFILE"] = ""
-    end
+  end
+
+  if ENV["BUNDLE_GEMFILE"].nil?
+    ENV["BUNDLE_GEMFILE"] = ""
   end
 end

spec/bundler/runtime/inline_spec.rb

@@ -207,6 +207,116 @@ RSpec.describe "bundler/inline#gemfile" do
     expect(err).to be_empty
   end
 
+<<<<<<< HEAD:spec/bundler/runtime/inline_spec.rb
+=======
+  it "doesn't reinstall already installed gems" do
+    system_gems "rack-1.0.0"
+
+    script <<-RUBY
+      require '#{entrypoint}'
+      ui = Bundler::UI::Shell.new
+      ui.level = "confirm"
+
+      gemfile(true, ui: ui) do
+        source "#{file_uri_for(gem_repo1)}"
+        gem "activesupport"
+        gem "rack"
+      end
+    RUBY
+
+    expect(out).to include("Installing activesupport")
+    expect(out).not_to include("Installing rack")
+    expect(err).to be_empty
+  end
+
+  it "installs gems in later gemfile calls" do
+    system_gems "rack-1.0.0"
+
+    script <<-RUBY
+      require '#{entrypoint}'
+      ui = Bundler::UI::Shell.new
+      ui.level = "confirm"
+      gemfile(true, ui: ui) do
+        source "#{file_uri_for(gem_repo1)}"
+        gem "rack"
+      end
+
+      gemfile(true, ui: ui) do
+        source "#{file_uri_for(gem_repo1)}"
+        gem "activesupport"
+      end
+    RUBY
+
+    expect(out).to include("Installing activesupport")
+    expect(out).not_to include("Installing rack")
+    expect(err).to be_empty
+  end
+
+  it "doesn't reinstall already installed gems in later gemfile calls" do
+    system_gems "rack-1.0.0"
+
+    script <<-RUBY
+      require '#{entrypoint}'
+      ui = Bundler::UI::Shell.new
+      ui.level = "confirm"
+      gemfile(true, ui: ui) do
+        source "#{file_uri_for(gem_repo1)}"
+        gem "activesupport"
+      end
+
+      gemfile(true, ui: ui) do
+        source "#{file_uri_for(gem_repo1)}"
+        gem "rack"
+      end
+    RUBY
+
+    expect(out).to include("Installing activesupport")
+    expect(out).not_to include("Installing rack")
+    expect(err).to be_empty
+  end
+
+  it "installs gems with native extensions in later gemfile calls" do
+    system_gems "rack-1.0.0"
+
+    build_git "foo" do |s|
+      s.add_dependency "rake"
+      s.extensions << "Rakefile"
+      s.write "Rakefile", <<-RUBY
+        task :default do
+          path = File.expand_path("lib", __dir__)
+          FileUtils.mkdir_p(path)
+          File.open("\#{path}/foo.rb", "w") do |f|
+            f.puts "FOO = 'YES'"
+          end
+        end
+      RUBY
+    end
+
+    script <<-RUBY
+      require '#{entrypoint}'
+      ui = Bundler::UI::Shell.new
+      ui.level = "confirm"
+      gemfile(true, ui: ui) do
+        source "#{file_uri_for(gem_repo1)}"
+        gem "rack"
+      end
+
+      gemfile(true, ui: ui) do
+        source "#{file_uri_for(gem_repo1)}"
+        gem "foo", :git => "#{lib_path("foo-1.0")}"
+      end
+
+      require 'foo'
+      puts FOO
+      puts $:.grep(/ext/)
+    RUBY
+
+    expect(out).to include("YES")
+    expect(out).to include(Pathname.glob(default_bundle_path("bundler/gems/extensions/**/foo-1.0-*")).first.to_s)
+    expect(err).to be_empty
+  end
+
+>>>>>>> fa6e6ea95c2 (Fix issue with extensions not compiling properly using inline gemfile):bundler/spec/runtime/inline_spec.rb
   it "installs inline gems when a Gemfile.lock is present" do
     gemfile <<-G
       source "https://notaserver.com"