Add initial support for Reline on Ruby 3.3

lib/pry/indent.rb

@@ -17,6 +17,9 @@ class UnparseableNestingError < StandardError; end
     # @return [String] String containing the spaces to be inserted before the next line.
     attr_reader :indent_level
 
+    # @return [String] String containing the spaces for the current line.
+    attr_reader :last_indent_level
+
     # @return [Array<String>] The stack of open tokens.
     attr_reader :stack
 
@@ -110,6 +113,7 @@ def initialize(pry_instance = Pry.new)
     def reset
       @stack = []
       @indent_level = String.new # rubocop:disable Style/EmptyLiteral
+      @last_indent_level = @indent_level
       @heredoc_queue = []
       @close_heredocs = {}
       @string_start = nil
@@ -164,11 +168,11 @@ def indent(input)
 
         output += line
 
+        @last_indent_level = prefix
         prefix = new_prefix
       end
 
       @indent_level = prefix
-
       output
     end
 

lib/pry/repl.rb

@@ -100,7 +100,7 @@ def read
       # Return nil for EOF, :no_more_input for error, or :control_c for <Ctrl-C>
       return val unless val.is_a?(String)
 
-      if pry.config.auto_indent
+      if pry.config.auto_indent && !reline_available?
         original_val = "#{indentation}#{val}"
         indented_val = @indent.indent(val)
 
@@ -179,7 +179,9 @@ def read_line(current_prompt)
           end
         end
 
-        if readline_available?
+        if reline_available?
+          input_reline(current_prompt)
+        elsif readline_available?
           set_readline_output
           input_readline(current_prompt, false) # false since we'll add it manually
         elsif coolline_available?
@@ -192,12 +194,43 @@ def read_line(current_prompt)
       end
     end
 
+    def input_reline(*args)
+      require 'prism'
+
+      Reline.output_modifier_proc = lambda do |text, _|
+        if pry.color
+          SyntaxHighlighter.highlight(text)
+        else
+          text
+        end
+      end
+
+      if pry.config.auto_indent
+        Reline.auto_indent_proc = lambda do |lines, _line_index, _byte_pointer, _newline|
+          pry_indentation = Pry::Indent.new
+          pry_indentation.indent(lines.join("\n"))
+          pry_indentation.last_indent_level.length
+        end
+      end
+
+      Pry::InputLock.for(:all).interruptible_region do
+        input.readmultiline(*args) do |multiline_input|
+          Pry.commands.find_command(multiline_input) ||
+            (Prism.parse_success?(multiline_input) && !Reline::IOGate.in_pasting?)
+        end
+      end
+    end
+
     def input_readline(*args)
       Pry::InputLock.for(:all).interruptible_region do
         input.readline(*args)
       end
     end
 
+    def reline_available?
+      defined?(Reline) && input == Reline
+    end
+
     def readline_available?
       defined?(Readline) && input == Readline
     end