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EDIT :: local_remote_options.rb

# frozen_string_literal: true
#--
# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
# All rights reserved.
# See LICENSE.txt for permissions.
#++

require "uri"
require_relative "../rubygems"

##
# Mixin methods for local and remote Gem::Command options.

module Gem::LocalRemoteOptions

##
  # Allows Gem::OptionParser to handle HTTP URIs.

def accept_uri_http
    Gem::OptionParser.accept URI::HTTP do |value|
      begin
        uri = URI.parse value
      rescue URI::InvalidURIError
        raise Gem::OptionParser::InvalidArgument, value
      end

valid_uri_schemes = ["http", "https", "file", "s3"]
      unless valid_uri_schemes.include?(uri.scheme)
        msg = "Invalid uri scheme for #{value}\nPreface URLs with one of #{valid_uri_schemes.map {|s| "#{s}://" }}"
        raise ArgumentError, msg
      end

value
    end
  end

##
  # Add local/remote options to the command line parser.

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

##
  # Add the --bulk-threshold option

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

##
  # Add the --clear-sources option

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

##
  # Add the --http-proxy option

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

##
  # Add the --source option

def add_source_option
    accept_uri_http

add_option(:"Local/Remote", "-s", "--source URL", URI::HTTP,
               "Append URL to list of remote gem sources") do |source, options|
      source << "/" if source !~ /\/\z/

if options.delete :sources_cleared
        Gem.sources = [source]
      else
        Gem.sources << source unless Gem.sources.include?(source)
      end
    end
  end

##
  # Add the --update-sources option

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

##
  # Is fetching of local and remote information enabled?

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

##
  # Is local fetching enabled?

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

##
  # Is remote fetching enabled?

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

end

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EDIT :: local_remote_options.rb