[ruby/rubygems] Add informational message when default_cli_command is unset.

https://github.com/ruby/rubygems/commit/9e44b5ebc4

2 files changed, 18 insertions, 0 deletions

diff --git a/lib/bundler/cli.rb b/lib/bundler/cli.rb
index d3c948c7ce..f5977863dd 100644
--- a/lib/bundler/cli.rb
+++ b/lib/bundler/cli.rb
@@ -131,6 +131,16 @@ module Bundler
     def self.default_command(meth = nil)
       return super if meth
 
+      unless Bundler.settings[:default_cli_command]
+        Bundler.ui.info <<-MSG
+          In the feature version of Bundler, running `bundle` without argument will no longer run `bundle install`.
+          Instead, the `cli_help` command will be displayed. Please use `bundle install` explicitly for scripts like CI/CD.
+          If you wish to use feature behavior now with `bundle config set default_cli_command cli_help --global`
+          or you can continue to use the old behavior with `bundle config set default_cli_command install_or_cli_help --global`.
+          This message will be removed after a default_cli_command value is set.
+        MSG
+      end
+
       Bundler.settings[:default_cli_command] || "install_or_cli_help"
     end
 
diff --git a/spec/bundler/bundler/cli_spec.rb b/spec/bundler/bundler/cli_spec.rb
index 33a23a75de..ac6b77ad74 100644
--- a/spec/bundler/bundler/cli_spec.rb
+++ b/spec/bundler/bundler/cli_spec.rb
@@ -90,6 +90,7 @@ RSpec.describe "bundle executable" do
     it "tries to installs by default but print help on missing Gemfile" do
       bundle "", raise_on_error: false
       expect(err).to include("Could not locate Gemfile")
+      expect(out).to include("In the feature version of Bundler")
 
       expect(out).to include("Bundler version #{Bundler::VERSION}").
         and include("\n\nBundler commands:\n\n").
@@ -97,6 +98,13 @@ RSpec.describe "bundle executable" do
         and include("\n\n  Utilities:\n").
         and include("\n\nOptions:\n")
     end
+
+    it "runs bundle install when default_cli_command set to install" do
+      bundle "config set default_cli_command install_or_cli_help"
+      bundle "", raise_on_error: false
+      expect(out).to_not include("In the feature version of Bundler")
+      expect(err).to include("Could not locate Gemfile")
+    end
   end
 
   context "when ENV['BUNDLE_GEMFILE'] is set to an empty string" do