Newly generated gems require Ruby 2.6.0

In 2021, Ruby 2.5 and older are EOL.
We can set the default required Ruby version to 2.6.0 to
encourage people to use newer Ruby.
If the command is executed with old Ruby, it falls back to 2.3.0.
It's still possible to create a gem for older Ruby just by changing
two lines of code (one in gemspec and another is in rubocop.yml).

1 files changed, 28 insertions, 3 deletions

diff --git a/lib/bundler/cli/gem.rb b/lib/bundler/cli/gem.rb
index a034aea324..e917ceb7d4 100644
--- a/lib/bundler/cli/gem.rb
+++ b/lib/bundler/cli/gem.rb
@@ -68,7 +68,7 @@ module Bundler
         :bundler_version  => bundler_dependency_version,
         :git              => use_git,
         :github_username  => github_username.empty? ? "[USERNAME]" : github_username,
-        :required_ruby_version => Gem.ruby_version < Gem::Version.new("2.4.a") ? "2.3.0" : "2.4.0",
+        :required_ruby_version => required_ruby_version,
       }
       ensure_safe_gem_name(name, constant_array)
 
@@ -166,11 +166,11 @@ module Bundler
       config[:linter] = ask_and_set_linter
       case config[:linter]
       when "rubocop"
-        config[:linter_version] = Gem.ruby_version < Gem::Version.new("2.4.a") ? "0.81.0" : "1.7"
+        config[:linter_version] = rubocop_version
         Bundler.ui.info "RuboCop enabled in config"
         templates.merge!("rubocop.yml.tt" => ".rubocop.yml")
       when "standard"
-        config[:linter_version] = Gem.ruby_version < Gem::Version.new("2.4.a") ? "0.2.5" : "1.0"
+        config[:linter_version] = standard_version
         Bundler.ui.info "Standard enabled in config"
         templates.merge!("standard.yml.tt" => ".standard.yml")
       end
@@ -403,5 +403,30 @@ module Bundler
     def open_editor(editor, file)
       thor.run(%(#{editor} "#{file}"))
     end
+
+    def required_ruby_version
+      if Gem.ruby_version < Gem::Version.new("2.4.a") then "2.3.0"
+      elsif Gem.ruby_version < Gem::Version.new("2.5.a") then "2.4.0"
+      elsif Gem.ruby_version < Gem::Version.new("2.6.a") then "2.5.0"
+      else
+        "2.6.0"
+      end
+    end
+
+    def rubocop_version
+      if Gem.ruby_version < Gem::Version.new("2.4.a") then "0.81.0"
+      elsif Gem.ruby_version < Gem::Version.new("2.5.a") then "1.12"
+      else
+        "1.21"
+      end
+    end
+
+    def standard_version
+      if Gem.ruby_version < Gem::Version.new("2.4.a") then "0.2.5"
+      elsif Gem.ruby_version < Gem::Version.new("2.5.a") then "1.0"
+      else
+        "1.3"
+      end
+    end
   end
 end