Manually cherry-picked at rubygems/rubygems@80260b3

lib/bundler/cli.rb

@@ -575,6 +575,7 @@ def viz
     method_option :rubocop, :type => :boolean, :desc => "Add rubocop to the generated Rakefile and gemspec. Set a default with `bundle config set gem.rubocop true`."
     method_option :test, :type => :string, :lazy_default => Bundler.settings["gem.test"] || "", :aliases => "-t", :banner => "Use the specified test framework for your library",
                          :desc => "Generate a test directory for your library, either rspec, minitest or test-unit. Set a default with `bundle config set gem.test rspec`."
+    method_option :ci,   :type => :string, :desc => "Generate CI configuration, either Github Actions, Travis CI, Gitlab CI or Circle CI. Set a default with `bundle config set gem.ci (github|travis|gitlab|circle)`"
     def gem(name)
     end
 

lib/bundler/cli/gem.rb

@@ -84,8 +84,6 @@ def run
         config[:test] = test_framework
         config[:test_framework_version] = TEST_FRAMEWORK_VERSIONS[test_framework]
 
-        templates.merge!("travis.yml.tt" => ".travis.yml")
-
         case test_framework
         when "rspec"
           templates.merge!(
@@ -109,6 +107,25 @@ def run
         end
       end
 
+      if ci_template = ask_and_set_ci
+        config[:ci] = ci_template
+
+        case ci_template
+        when "github"
+          templates.merge!(".github/workflows/main.yml.tt" => ".github/workflows/main.yml")
+          config[:ci] = "github"
+        when "travis"
+          templates.merge!("travis.yml.tt" => ".travis.yml")
+          config[:ci] = "travis"
+        when "gitlab"
+          templates.merge!(".gitlab-ci.yml.tt" => ".gitlab-ci.yml")
+          config[:ci] = "gitlab"
+        when "circle"
+          templates.merge!(".circleci/config.yml.tt" => ".circleci/config.yml")
+          config[:ci] = "circleci"
+        end
+      end
+
       if ask_and_set(:mit, "Do you want to license your code permissively under the MIT license?",
         "This means that any other developer or company will be legally allowed to use your code " \
         "for free as long as they admit you created it. You can read more about the MIT license " \
@@ -247,6 +264,35 @@ def test_framework_hint
       end
     end
 
+    def ask_and_set_ci
+      ci_template = options[:ci] || Bundler.settings["gem.ci"]
+
+      if ci_template.nil?
+        Bundler.ui.confirm "Do you want to add Continuous Integration to your gem? " \
+        "Adding a CI service to your project helps ensure your project is well tested " \
+        "before shipping your gem to users. Bundler recommends several different services for testing "\
+        "your code. For more information about each service, see:\n" \
+        "* Travis CI:      https://travis-ci.org/\n" \
+        "* Github Actions: https://github.com/features/actions\n" \
+        "* Circle CI:      https://circleci.com/\n" \
+        "* Gitlab CI:      https://docs.gitlab.com/ee/ci/\n\n"
+
+        result = Bundler.ui.ask "Type 'github', 'travis', 'gitlab' or 'circle' to generate those test files now and " \
+          "in the future. github/travis/gitlab/circle/(none):"
+        if result =~ /github|travis|gitlab|circle/
+          ci_template = result
+        else
+          ci_template = false
+        end
+      end
+
+      if Bundler.settings["gem.ci"].nil?
+        Bundler.settings.set_global("gem.ci", ci_template)
+      end
+
+      ci_template
+    end
+
     def bundler_dependency_version
       v = Gem::Version.new(Bundler::VERSION)
       req = v.segments[0..1]

lib/bundler/templates/newgem/.circleci/config.yml.tt

@@ -0,0 +1,13 @@
+version: 2.1
+jobs:
+  build:
+    docker:
+      - image: ruby:<%= RUBY_VERSION %>
+    steps:
+      - checkout
+      - run:
+          name: Run tests
+          command: |
+            gem install bundler -v <%= Bundler::Version %>
+            bundle install
+            bundle exec rake test

lib/bundler/templates/newgem/.github/workflows/main.yml.tt

@@ -0,0 +1,18 @@
+name: Ruby
+
+on: [push,pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Ruby <%= ::Gem::Version.new(RUBY_VERSION).segments[0..1].join(".") %>
+      uses: actions/setup-ruby@v1
+      with:
+        ruby-version: <%= ::Gem::Version.new(RUBY_VERSION).segments[0..1].join(".") %>.x
+    - name: Build and test with Rake
+      run: |
+        gem install bundler -v <%= Bundler::VERSION %>
+        bundle install --jobs 4 --retry 3
+        bundle exec rake

lib/bundler/templates/newgem/.gitlab-ci.yml.tt

@@ -0,0 +1,9 @@
+image: ruby:<%= RUBY_VERSION %>
+
+before_script:
+  - gem install bundler -v <%= Bundler::VERSION %>
+  - bundle install
+
+example_job:
+  script:
+    - bundle exec rake

spec/bundler/commands/newgem_spec.rb

@@ -585,6 +585,94 @@ def create_temporary_dir(dir)
       it_behaves_like "test framework is present"
     end
 
+    context "--ci with no arugment" do
+      it "does not generate any CI config" do
+        bundle "gem #{gem_name}"
+
+        expect(bundled_app("#{gem_name}/.github/workflows/main.yml")).to_not exist
+        expect(bundled_app("#{gem_name}/.travis.yml")).to_not exist
+        expect(bundled_app("#{gem_name}/.gitlab-ci.yml")).to_not exist
+        expect(bundled_app("#{gem_name}/.circleci/config.yml")).to_not exist
+      end
+    end
+
+    context "--ci set to github" do
+      it "generates a Github Actions config file" do
+        bundle "gem #{gem_name} --ci=github"
+
+        expect(bundled_app("#{gem_name}/.github/workflows/main.yml")).to exist
+      end
+    end
+
+    context "--ci set to gitlab" do
+      it "generates a Gitlab Ci config file" do
+        bundle "gem #{gem_name} --ci=gitlab"
+
+        expect(bundled_app("#{gem_name}/.gitlab-ci.yml")).to exist
+      end
+    end
+
+    context "--ci set to circle" do
+      it "generates a Circle Ci config file" do
+        bundle "gem #{gem_name} --ci=circle"
+
+        expect(bundled_app("#{gem_name}/.circleci/config.yml")).to exist
+      end
+    end
+
+    context "--ci set to travis" do
+      it "generates a Travis Ci config file" do
+        bundle "gem #{gem_name} --ci=travis"
+
+        expect(bundled_app("#{gem_name}/.travis.yml")).to exist
+      end
+    end
+
+    context "gem.ci setting set to none" do
+      it "doesnt generate any CI config" do
+        expect(bundled_app("#{gem_name}/.github/workflows/main.yml")).to_not exist
+        expect(bundled_app("#{gem_name}/.travis.yml")).to_not exist
+        expect(bundled_app("#{gem_name}/.gitlab-ci.yml")).to_not exist
+        expect(bundled_app("#{gem_name}/.circleci/config.yml")).to_not exist
+      end
+    end
+
+    context "gem.ci setting set to github" do
+      it "generates a Github Actions config file" do
+        bundle "config set gem.ci github"
+        bundle "gem #{gem_name}"
+
+        expect(bundled_app("#{gem_name}/.github/workflows/main.yml")).to exist
+      end
+    end
+
+    context "gem.ci setting set to travis" do
+      it "generates a Travis config file" do
+        bundle "config set gem.ci travis"
+        bundle "gem #{gem_name}"
+
+        expect(bundled_app("#{gem_name}/.travis.yml")).to exist
+      end
+    end
+
+    context "gem.ci setting set to gitlab" do
+      it "generates a Gitlab config file" do
+        bundle "config set gem.ci gitlab"
+        bundle "gem #{gem_name}"
+
+        expect(bundled_app("#{gem_name}/.gitlab-ci.yml")).to exist
+      end
+    end
+
+    context "gem.ci setting set to circleci" do
+      it "generates a CircleCI config file" do
+        bundle "config set gem.ci circle"
+        bundle "gem #{gem_name}"
+
+        expect(bundled_app("#{gem_name}/.circleci/config.yml")).to exist
+      end
+    end
+
     context "gem.test setting set to test-unit" do
       before do
         bundle "config set gem.test test-unit"
@@ -875,8 +963,18 @@ def create_temporary_dir(dir)
       expect(bundled_app("foobar/Gemfile").read).to include('gem "rspec"')
     end
 
+    it "asks about CI service" do
+      global_config "BUNDLE_GEM__TEST" => "false", "BUNDLE_GEM__MIT" => "false", "BUNDLE_GEM__COC" => "false", "BUNDLE_GEM__RUBOCOP" => "false"
+
+      bundle! "gem foobar" do |input, _, _|
+        input.puts "github"
+      end
+
+      expect(bundled_app("foobar/.github/workflows/main.yml")).to exist
+    end
+
     it "asks about MIT license" do
-      global_config "BUNDLE_GEM__TEST" => "false", "BUNDLE_GEM__COC" => "false"
+      global_config "BUNDLE_GEM__TEST" => "false", "BUNDLE_GEM__COC" => "false", "BUNDLE_GEM__CI" => "false", "BUNDLE_GEM__RUBOCOP" => "false"
 
       bundle "config list"
 
@@ -888,7 +986,7 @@ def create_temporary_dir(dir)
     end
 
     it "asks about CoC" do
-      global_config "BUNDLE_GEM__MIT" => "false", "BUNDLE_GEM__TEST" => "false"
+      global_config "BUNDLE_GEM__MIT" => "false", "BUNDLE_GEM__TEST" => "false", "BUNDLE_GEM__CI" => "false", "BUNDLE_GEM__RUBOCOP" => "false"
 
       bundle! "gem foobar" do |input, _, _|
         input.puts "yes"