Climate

Yet another bloody CLI library for ruby, based on, and inspired by, the magnificence that is trollop, with more of a mind for building up a git-like CLI to access your application without enforcing a particular style of project structure.

Designed for both simple uses, as well as more complicated use cases

Easy

Useful for one-shot scripts

Climate.run do
  banner "Do something arbitrary to a file"

  opt :log, "Whether to log to stdout" :default => false
  arg :path "Path to input file"

  def run
    file = File.open(arguments[:path], 'r')
    puts("loaded #{file}") if options[:log]
  end
end

Medium

This style is more intended for embedding a CLI in to your existing application

class Parent < Climate::Command
  banner "App that does it all, yet without fuss"
  opt    :log, "Whether to log to stdout" :default => false
end

class Arbitrary < Climate::Command
  subcommand 'arbitrary', Parent
  banner "Do something arbitrary to a file"
  arg    :path "Path to input file"

  def run
    file = File.open(arguments[:path], 'r')
    puts("loaded #{file}") if options[:log]
  end
end

Climate.with_standard_exception_handling do
  Parent.run(ARGV)
end

ruby -rclimate example.rb --log /tmp/file

or

ruby -rclimate example.rb --help