EasyRepl
A Repl (Read Eval Print Loop) library.
Features
- Ease of use. Just pass a block to the start method to process the user's input.
- Command History
- Exit Command
- Reload Command
- Setup and Teardown lifecycle methods
- After Input and Before Input lifecylce methods
Usage
require 'easy_repl'
#start an echoing repl
EasyRepl.start
# > a
# a
# > b
# b
# > exit
#start a repl that reverses input
EasyRepl.start do |input|
puts input.reverse
end
# > abc
# cba
# > def
# fed
# > exit
#create a repl class with a life cycle
class MyRepl
include EasyRepl::Repl
def setup
puts "LOADING RESOURCES"
end
def before_input
puts "before_input"
end
def process_input(input)
puts input.reverse
end
def after_input
puts "after_input"
end
def teardown
puts "CLOSING RESOURCES"
end
end
MyRepl.new.start
# LOADING RESOURCES
# before_input
# > abc
# after_input
# cba
# before_input
# > reload
# after_input
# CLOSING RESOURCES
# LOADING RESOURCES
# before_input
# > exit
# after_input
# CLOSING RESOURCES
# rename the history file before starting the repl
EasyRepl.history_file = ".myrepl_history"
EasyRepl.startInstallation
Add this line to your application's Gemfile:
gem 'easy_repl'
And then execute:
$ bundle
Or install it yourself as:
$ gem install easy_repl
Contributing
- Fork it
- Create your feature branch (
git checkout -b my-new-feature) - Commit your changes (
git commit -am 'Add some feature') - Push to the branch (
git push origin my-new-feature) - Create new Pull Request