class Bundler::Dsl

def check_primary_source_safety(source)
  return unless source.rubygems_primary_remotes.any?
  if Bundler.settings[:disable_multisource]
    raise GemspecError, "Warning: this Gemfile contains multiple primary sources. " \
      "Each source after the first must include a block to indicate which gems " \
      "should come from that source. To downgrade this error to a warning, run " \
      "`bundle config --delete disable_multisource`"
  else
    Bundler.ui.warn "Warning: this Gemfile contains multiple primary sources. " \
      "Using `source` more than once without a block is a security risk, and " \
      "may result in installing unexpected gems. To resolve this warning, use " \
      "a block to indicate which gems should come from the secondary source. " \
      "To upgrade this warning to an error, run `bundle config " \
      "disable_multisource true`."
  end
end