This is a screen capture of IRB improved by Reline.

Reline is compatible with the API of Ruby's stdlib 'readline', GNU Readline and Editline by pure Ruby implementation.

It's compatible with the readline standard library.

See the document of readline stdlib or bin/example.

require "reline"

prompt = 'prompt> '
use_history = true

begin
  while true
    text = Reline.readmultiline(prompt, use_history) do |multiline_input|
      # Accept the input until `end` is entered
      multiline_input.split.last == "end"
    end

    puts 'You entered:'
    puts text
  end
# If you want to exit, type Ctrl-C
rescue Interrupt
  puts '^C'
  exit 0
end

$ ruby example.rb
prompt> aaa
prompt> bbb
prompt> end
You entered:
aaa
bbb
end

See also: test/reline/yamatanooroti/multiline_repl

You can modify the text color and text decorations in your terminal emulator. See doc/reline/face.md

Bug reports and pull requests are welcome on GitHub at https://github.com/ruby/reline.

Note Please make sure you have libvterm installed for yamatanooroti tests (integration tests).

If you use Homebrew, you can install it by running brew install libvterm.

WITH_VTERM=1 bundle install
WITH_VTERM=1 bundle exec rake test test_yamatanooroti

rake release
gh release create vX.Y.Z --generate-notes

The gem is available as open source under the terms of the Ruby License.

In developing Reline, we have used some of the rb-readline implementation, so this library includes copyright notice, list of conditions and the disclaimer under the 3-Clause BSD License. Reline would never have been developed without rb-readline. Thank you for the tremendous accomplishments.