class ChefCLI::PolicyfileLock

def validate_cookbooks!
  cookbook_locks.each do |name, cookbook_lock|
    cookbook_lock.validate!
    cookbook_lock.refresh!
  end
  # Check that versions and dependencies are still valid. First we need to
  # refresh the dependency info for everything that has changed, then we
  # check that the new versions and dependencies are valid for the working
  # set of cookbooks. We can't do this in a single loop because the user
  # may have modified two cookbooks such that the versions and constraints
  # are only valid when both changes are considered together.
  cookbook_locks.each do |name, cookbook_lock|
    if cookbook_lock.updated?
      solution_dependencies.update_cookbook_dep(name, cookbook_lock.version, cookbook_lock.dependencies)
    end
  end
  cookbook_locks.each do |name, cookbook_lock|
    if cookbook_lock.updated?
      solution_dependencies.test_conflict!(cookbook_lock.name, cookbook_lock.version)
    end
  end
  true
end