A simple cli wrapper around the `cronex` gem.

cronex

#!/usr/bin/env ruby

if ARGV.size != 1
  puts "usage: cronex [cron line]"
  exit 1
end

require "bundler/inline"

gemfile do
  source "https://rubygems.org"
  gem "cronex"
end

begin
  puts Cronex::ExpressionDescriptor.new(ARGV.first).description
rescue => e
  puts "error: invalid cron line syntax"
  puts "message: #{e.message}"
  exit 2
end