module Gem::LocalRemoteOptions

def accept_uri_http
  OptionParser.accept URI::HTTP do |value|
    begin
      uri = URI.parse value
    rescue URI::InvalidURIError
      raise OptionParser::InvalidArgument, value
    end
    unless ['http', 'https', 'file'].include?(uri.scheme)
       raise OptionParser::InvalidArgument, value
    end
    value
  end
end

def add_bulk_threshold_option
  add_option(:"Local/Remote", '-B', '--bulk-threshold COUNT',
             "Threshold for switching to bulk",
             "synchronization (default #{Gem.configuration.bulk_threshold})") do
    |value, options|
    Gem.configuration.bulk_threshold = value.to_i
  end
end

def add_clear_sources_option
  add_option(:"Local/Remote", '--clear-sources',
             'Clear the gem sources') do |value, options|
    Gem.sources = nil
    options[:sources_cleared] = true
  end
end

def add_local_remote_options
  add_option(:"Local/Remote", '-l', '--local',
             'Restrict operations to the LOCAL domain') do |value, options|
    options[:domain] = :local
  end
  add_option(:"Local/Remote", '-r', '--remote',
    'Restrict operations to the REMOTE domain') do |value, options|
    options[:domain] = :remote
  end
  add_option(:"Local/Remote", '-b', '--both',
             'Allow LOCAL and REMOTE operations') do |value, options|
    options[:domain] = :both
  end
  add_bulk_threshold_option
  add_clear_sources_option
  add_source_option
  add_proxy_option
  add_update_sources_option
end

def add_proxy_option
  accept_uri_http
  add_option(:"Local/Remote", '-p', '--[no-]http-proxy [URL]', URI::HTTP,
             'Use HTTP proxy for remote operations') do |value, options|
    options[:http_proxy] = (value == false) ? :no_proxy : value
    Gem.configuration[:http_proxy] = options[:http_proxy]
  end
end

def add_source_option
  accept_uri_http
  add_option(:"Local/Remote", '--source URL', URI::HTTP,
             'Add URL as a remote source for gems') do |source, options|
    source << '/' if source !~ /\/\z/
    if options.delete :sources_cleared then
      Gem.sources = [source]
    else
      Gem.sources << source unless Gem.sources.include?(source)
    end
  end
end

def add_update_sources_option
  add_option(:Deprecated, '-u', '--[no-]update-sources',
             'Update local source cache') do |value, options|
    Gem.configuration.update_sources = value
  end
end

def both?
  options[:domain] == :both
end

def local?
  options[:domain] == :local || options[:domain] == :both
end

def remote?
  options[:domain] == :remote || options[:domain] == :both
end