CommandTree

Builds trees of commands for the terminal, each node is either a group of commands or the command itself, every node is associated with a character to access it.

The previous Asciinema script is here: https://gist.github.com/emad-elsaid/b259894caa9a78863b582ecc7a31811a

Add this line to your application's Gemfile:

gem 'command_tree'

And then execute:

$ bundle

Or install it yourself as:

$ gem install command_tree

You start by creating a new tree

t = CommandTree::Tree.new

Then you register a command category (a node that contains a group of commands)

t.register 'a', 'Applications' # associate the character 'a' to a category called 'applications'

Then register commands inside that prefix

t.register 'ag','Google Chrome' do
  system 'google-chrome-stable'
end

the previous block will be assigned to 'g' inside 'a' which is the application's prefix, so you can execute it with 'ag' when you run that tree in terminal.

To run the tree call #show

t.show

it will print the toplevel categories and commands and wait for you to press a character to execute the command or print sub commands of a category node.

when the tree reachs a leaf it'll exit, if a command is the leaf it will execute it and exit the tree giving your code the control again.

There is another way to define a group of commands in a nested way using Tree#group method as follows

t = CommandTree::Tree.new
t.group 'a', 'Applications' do |g|
  g.register 'g','Google Chrome' do
    system 'google-chrome-stable'
  end
end
t.show

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/emad-elsaid/command_tree.

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