class Bundler::Injector

def cross_check_for_errors(gemfile_path, original_deps, removed_deps, initial_gemfile)

Parameters:
  • initial_gemfile (Array) -- Contents of original Gemfile before any operation.
  • removed_deps (Array) -- Array of removed dependencies.
  • original_deps (Array) -- Array of original dependencies.
  • gemfile_path (Pathname) -- The Gemfile from which to remove dependencies. 
def cross_check_for_errors(gemfile_path, original_deps, removed_deps, initial_gemfile)
  # evaluate the new gemfile to look for any failure cases
  builder = Dsl.new
  builder.eval_gemfile(gemfile_path)
  # record gems which were removed but not requested
  extra_removed_gems = original_deps - builder.dependencies
  # if some extra gems were removed then raise error
  # and revert Gemfile to original
  unless extra_removed_gems.empty?
    SharedHelpers.write_to_gemfile(gemfile_path, initial_gemfile.join)
    raise InvalidOption, "Gems could not be removed. #{extra_removed_gems.join(", ")} would also have been removed. Bundler cannot continue."
  end
  # record gems which could not be removed due to some reasons
  errored_deps = builder.dependencies.select {|d| d.gemfile == gemfile_path } & removed_deps.select {|d| d.gemfile == gemfile_path }
  show_warning "#{errored_deps.map(&:name).join(", ")} could not be removed." unless errored_deps.empty?
  # return actual removed dependencies
  removed_deps - errored_deps
end