gemfile-parser.rb

require 'bundler'

gemfile = Bundler::Dsl.new
gemfile.eval_gemfile(ENV['BUNDLE_GEMFILE'] || 'Gemfile')
dependencies = gemfile.dependencies
# specs = dependencies.map(&:to_spec)

dependencies.each do |d|
  begin
    spec = d.to_spec
  rescue Gem::MissingSpecError, Gem::MissingSpecVersionError
    next
  end
  puts spec.name
  puts spec.metadata
end

puts "-----------------"

Bundler.load.specs.each do |spec|
  puts spec.name
  puts spec.metadata
end