[rubygems/rubygems] bundle-gem learns to find Gemfile template correctly

Removes the symlink for gems.rb.tt and instead uses the singular
template file. Only the destination filename for the gemfile reads from
the `init_gems_rb` setting.

43ce0e1666

lib/bundler/cli/gem.rb

@@ -79,7 +79,7 @@ module Bundler
       ensure_safe_gem_name(name, constant_array)
 
       templates = {
-        "#{Bundler.preferred_gemfile_name}.tt" => Bundler.preferred_gemfile_name,
+        "Gemfile.tt" => Bundler.preferred_gemfile_name,
         "lib/newgem.rb.tt" => "lib/#{namespaced_path}.rb",
         "lib/newgem/version.rb.tt" => "lib/#{namespaced_path}/version.rb",
         "sig/newgem.rbs.tt" => "sig/#{namespaced_path}.rbs",

spec/bundler/commands/newgem_spec.rb

@@ -739,6 +739,30 @@ RSpec.describe "bundle gem" do
       end
     end
 
+    context "init_gems_rb setting to true" do
+      before do
+        bundle "config set init_gems_rb true"
+        bundle "gem #{gem_name}"
+      end
+
+      it "generates gems.rb instead of Gemfile" do
+        expect(bundled_app("#{gem_name}/gems.rb")).to exist
+        expect(bundled_app("#{gem_name}/Gemfile")).to_not exist
+      end
+    end
+
+    context "init_gems_rb setting to false" do
+      before do
+        bundle "config set init_gems_rb false"
+        bundle "gem #{gem_name}"
+      end
+
+      it "generates Gemfile instead of gems.rb" do
+        expect(bundled_app("#{gem_name}/gems.rb")).to_not exist
+        expect(bundled_app("#{gem_name}/Gemfile")).to exist
+      end
+    end
+
     context "gem.test setting set to rspec" do
       before do
         bundle "config set gem.test rspec"