Merge #7627staging

7627: Add new option to `bundle gem` for choosing a CI sevice r=colby-swandale a=colby-swandale

### Context

At the moment, every gem created with `bundle gem` will have configuration generated for Travis CI regardless of if you want to or not. When this change was introduced, Travis CI was a clear recommendation for most open source projects to use for testing their projects with. But this is no longer true, there are now lots of different CI services and Travis CI is no longer the clear recommendation it once was.

### Changes

This PR introduces a new option to `bundle gem` for choosing a CI service or just not generating one at all.

```
Creating gem 'test'...
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:
* Travis CI:      https://travis-ci.org/
* Github Actions: https://github.com/features/actions
* Circle CI:      https://circleci.com/
* Gitlab CI:      https://docs.gitlab.com/ee/ci/

Type 'github', 'travis', 'gitlab' or 'circle' to generate those test files now and in the future. github/travis/gitlab/circle/(none):
```

I decided to add Github Actions, Gitlab, Circle CI along with Travis CI, which i think covers most services most people will typically go with.

Each service will generate it's own configuration which is ready to use out the box.
 

Co-authored-by: Colby Swandale <me@colby.fyi>
Co-authored-by: Andre Arko <andre@arko.net>

1 files changed, 41 insertions, 2 deletions

diff --git a/lib/bundler/cli/gem.rb b/lib/bundler/cli/gem.rb
index 3fd67d9a88..d5cfd91a86 100644
--- a/lib/bundler/cli/gem.rb
+++ b/lib/bundler/cli/gem.rb
@@ -84,8 +84,6 @@ module Bundler
         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 +107,18 @@ module Bundler
         end
       end
 
+      config[:ci] = ask_and_set_ci
+      case config[:ci]
+      when "github"
+        templates.merge!(".github/workflows/main.yml.tt" => ".github/workflows/main.yml")
+      when "travis"
+        templates.merge!("travis.yml.tt" => ".travis.yml")
+      when "gitlab"
+        templates.merge!(".gitlab-ci.yml.tt" => ".gitlab-ci.yml")
+      when "circle"
+        templates.merge!(".circleci/config.yml.tt" => ".circleci/config.yml")
+      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 " \
@@ -231,6 +241,35 @@ module Bundler
       test_framework
     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 set up automated testing for your gem? " \
+          "Continuous integration services make it easy to see if pull requests have passing tests " \
+          "before you merge them. Bundler supports these services:"\
+          "* Circle CI:      https://circleci.com/\n" \
+          "* Github Actions: https://github.com/features/actions\n" \
+          "* Gitlab CI:      https://docs.gitlab.com/ee/ci/\n" \
+          "* Travis CI:      https://travis-ci.org/\n" \
+          "\n"
+
+        result = Bundler.ui.ask "Enter a service name to generate a CI configuration 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]