1 files changed, 0 insertions, 96 deletions
diff --git a/lib/irb/cmd/debug.rb b/lib/irb/cmd/debug.rb
deleted file mode 100644
index d43e060c67..0000000000
--- a/lib/irb/cmd/debug.rb
+++ /dev/null
@@ -1,96 +0,0 @@
-require_relative "nop"
-
-module IRB
-  # :stopdoc:
-
-  module ExtendCommand
-    class Debug < Nop
-      BINDING_IRB_FRAME_REGEXPS = [
-        '<internal:prelude>',
-        binding.method(:irb).source_location.first,
-      ].map { |file| /\A#{Regexp.escape(file)}:\d+:in `irb'\z/ }
-      IRB_DIR = File.expand_path('..', __dir__)
-
-      def execute(*args)
-        unless binding_irb?
-          puts "`debug` command is only available when IRB is started with binding.irb"
-          return
-        end
-
-        unless setup_debugger
-          puts <<~MSG
-            You need to install the debug gem before using this command.
-            If you use `bundle exec`, please add `gem "debug"` into your Gemfile.
-          MSG
-          return
-        end
-
-        # To make debugger commands like `next` or `continue` work without asking
-        # the user to quit IRB after that, we need to exit IRB first and then hit
-        # a TracePoint on #debug_break.
-        file, lineno = IRB::Irb.instance_method(:debug_break).source_location
-        DEBUGGER__::SESSION.add_line_breakpoint(file, lineno + 1, oneshot: true, hook_call: false)
-        # exit current Irb#run call
-        throw :IRB_EXIT
-      end
-
-      private
-
-      def binding_irb?
-        caller.any? do |frame|
-          BINDING_IRB_FRAME_REGEXPS.any? do |regexp|
-            frame.match?(regexp)
-          end
-        end
-      end
-
-      def setup_debugger
-        unless defined?(DEBUGGER__::SESSION)
-          begin
-            require "debug/session"
-          rescue LoadError # debug.gem is not written in Gemfile
-            return false unless load_bundled_debug_gem
-          end
-          DEBUGGER__.start(nonstop: true)
-        end
-
-        unless DEBUGGER__.respond_to?(:capture_frames_without_irb)
-          DEBUGGER__.singleton_class.send(:alias_method, :capture_frames_without_irb, :capture_frames)
-
-          def DEBUGGER__.capture_frames(*args)
-            frames = capture_frames_without_irb(*args)
-            frames.reject! do |frame|
-              frame.realpath&.start_with?(IRB_DIR) || frame.path == "<internal:prelude>"
-            end
-            frames
-          end
-        end
-
-        true
-      end
-
-      # This is used when debug.gem is not written in Gemfile. Even if it's not
-      # installed by `bundle install`, debug.gem is installed by default because
-      # it's a bundled gem. This method tries to activate and load that.
-      def load_bundled_debug_gem
-        # Discover latest debug.gem under GEM_PATH
-        debug_gem = Gem.paths.path.map { |path| Dir.glob("#{path}/gems/debug-*") }.flatten.select do |path|
-          File.basename(path).match?(/\Adebug-\d+\.\d+\.\d+\z/)
-        end.sort_by do |path|
-          Gem::Version.new(File.basename(path).delete_prefix('debug-'))
-        end.last
-        return false unless debug_gem
-
-        # Attempt to forcibly load the bundled gem
-        $LOAD_PATH << "#{debug_gem}/lib"
-        begin
-          require "debug/session"
-          puts "Loaded #{File.basename(debug_gem)}"
-          true
-        rescue LoadError
-          false
-        end
-      end
-    end
-  end
-end