This is a screen capture of IRB improved by Reline.
Reline
Reline is compatible with the API of Ruby's stdlib 'readline', GNU Readline and Editline by pure Ruby implementation.
Usage
Single line editing mode
It's compatible with the readline standard library.
See the document of readline stdlib or bin/example.
Multi-line editing mode
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
License
The gem is available as open source under the terms of the Ruby License.
Acknowledgments for rb-readline
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.