https://git.ruby-lang.org/ruby.git/commit/?id=3ab1cfc325

From 3ab1cfc325811b862cb81d0360bf83216cd6f235 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Josef=20=C5=A0im=C3=A1nek?= <josef.simanek@g...>
Date: Sun, 14 Jun 2020 00:26:23 +0200
Subject: Add Gem.disable_system_update_message to disable gem update --system
 if needed.


diff --git a/lib/rubygems.rb b/lib/rubygems.rb
index c018492..d24c07d 100644
--- a/lib/rubygems.rb
+++ b/lib/rubygems.rb
@@ -1188,6 +1188,12 @@ An Array (#{env.inspect}) was passed in from #{caller[3]} https://github.com/ruby/ruby/blob/trunk/lib/rubygems.rb#L1188
   class << self
 
     ##
+    # RubyGems distributors (like operating system package managers) can
+    # disable RubyGems update by setting this to error message printed to
+    # end-users on gem update --system instead of actual update.
+    attr_accessor :disable_system_update_message
+
+    ##
     # Hash of loaded Gem::Specification keyed by name
 
     attr_reader :loaded_specs
diff --git a/lib/rubygems/commands/update_command.rb b/lib/rubygems/commands/update_command.rb
index ca407ee..052d9f9 100644
--- a/lib/rubygems/commands/update_command.rb
+++ b/lib/rubygems/commands/update_command.rb
@@ -262,6 +262,11 @@ command to remove old versions. https://github.com/ruby/ruby/blob/trunk/lib/rubygems/commands/update_command.rb#L262
   # Update RubyGems software to the latest version.
 
   def update_rubygems
+    if Gem.disable_system_update_message
+      alert_error Gem.disable_system_update_message
+      return
+    end
+
     check_update_arguments
 
     version, requirement = rubygems_target_version
diff --git a/test/rubygems/test_gem_commands_update_command.rb b/test/rubygems/test_gem_commands_update_command.rb
index efaa621..3b823a0 100644
--- a/test/rubygems/test_gem_commands_update_command.rb
+++ b/test/rubygems/test_gem_commands_update_command.rb
@@ -238,6 +238,23 @@ class TestGemCommandsUpdateCommand < Gem::TestCase https://github.com/ruby/ruby/blob/trunk/test/rubygems/test_gem_commands_update_command.rb#L238
                  @ui.error
   end
 
+  def test_execute_system_with_disabled_update
+    old_disable_system_update_message = Gem.disable_system_update_message
+    Gem.disable_system_update_message = "Please use package manager instead."
+
+    @cmd.options[:args] = []
+    @cmd.options[:system] = true
+
+    use_ui @ui do
+      @cmd.execute
+    end
+
+    assert_empty @ui.output
+    assert_equal "ERROR:  Please use package manager instead.\n", @ui.error
+  ensure
+    Gem.disable_system_update_message = old_disable_system_update_message
+  end
+
   # before:
   #   a1 -> c1.2
   # after:
-- 
cgit v0.10.2


--
ML: ruby-changes@q...
Info: http://www.atdot.net/~ko1/quickml/