Rakefile

require "bundler/gem_tasks"
require 'rspec/core/rake_task'

desc 'Compile racc parser.y'
task :compile => 'lib/exp/parser.rb'

desc 'Test'
task :test    => :spec

desc 'Run specs'
task :spec    => :compile

task :default => :spec

rule '.rb' => '.y' do |t|
  sh "racc -l -o #{t.name} #{t.source}"
end

RSpec::Core::RakeTask.new do |task|
  task.rspec_opts = ["-c", "-f documentation", "-r ./spec/helper.rb"]
  task.pattern    = 'spec/**/*_spec.rb'
end

desc "Open an interactive session preloaded with this gem's code"
task :console => :compile do
  if gem_available?("pry")
    sh "pry -I lib -r exp.rb"
  else
    sh "irb -rubygems -I lib -r exp.rb"
  end
end

# Determins if a gem is available at the current runtime
def gem_available?(name)
  Gem::Specification.find_by_name(name)
rescue Gem::LoadError
  false
rescue
  Gem.available?(name) #for backwards compatibility
end