fancy_irb

Colors & Hash Rockets in IRB

Ruby

FancyIrb

Colorizes IRB prompts, errors, $stderr and $stdout
Uses “Hash Rockets” (#=>) to display IRB results

Version 2.0 for Modern IRB

Please note: Version 2.0 of this gem requires Ruby 3 and IRB 1.7+

Usage

require 'fancy_irb'
FancyIrb.start

You can pass an options hash as argument. These are the default values:

DEFAULT_OPTIONS = {
  :rocket_mode     => true,       # activate or deactivate #=> rocket
  :rocket_prompt   => '#=> ',     # prompt to use for the rocket
  :result_prompt   => '=> ',      # prompt to use for normal output
  :colorize => {                  # colors hash. Set to nil to deactivate colors
    :rocket_prompt => [:blue],
    :result_prompt => [:blue],
    :input_prompt  => nil,
    :irb_errors    => [:red, :clean],
    :stderr        => [:red, :bright],
    :stdout        => nil,
    :input         => nil,
   },
}

Rocket mode means: Instead of displaying the result on the next line, show it
on the same line (if there is enough space)

For more information on which colors can be used, see the paint documentation.

Troubleshooting

Windows Support

You will need ansicon or ConEmu or WSL.

Known Bugs

Not all methods dealing with input data are patched properly to work with the rocket,
the gem focuses on the commonly used ones, like gets or getc.

J-_-L

Inspired by the irb_rocket gem by genki.