[ruby/irb] Add irb_info command

https://github.com/ruby/irb/commit/a6fe58e916

1 files changed, 25 insertions, 0 deletions

diff --git a/lib/irb/cmd/info.rb b/lib/irb/cmd/info.rb
new file mode 100644
index 0000000000..ddf57b00b4
--- /dev/null
+++ b/lib/irb/cmd/info.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: false
+
+require_relative "nop"
+
+# :stopdoc:
+module IRB
+  module ExtendCommand
+    class Info < Nop
+      def execute
+        Class.new {
+          def inspect
+            <<~EOM.chomp
+              Ruby version: #{RUBY_VERSION}
+              IRB version: #{IRB.version}
+              InputMethod: #{IRB.CurrentContext.io.inspect}
+              .irbrc path: #{IRB.rc_file}
+            EOM
+          end
+          alias_method :to_s, :inspect
+        }.new
+      end
+    end
+  end
+end
+# :startdoc: