#!/usr/bin/ruby
  # Provide git credentials using Boxen's config.
  
  unless command = ARGV[0]
    this = File.basename $0
    abort "Usage: #{this} <get|store|erase>"
  end
  
  require "pathname"
  
  # It's a UTF-8, UTF-8, UTF-8 world.
  
  Encoding.default_external = Encoding::UTF_8 if RUBY_VERSION > "1.9"
  
  # Put us where we belong, in the root dir of our boxen repo.
  
  Dir.chdir Pathname.new(__FILE__).realpath + "../.."
  
  # Because we can be called from inside other Ruby processes, unset any
  # `BUNDLE_` environment variables.
  
  ENV.keys.select { |k| /^BUNDLE_/i }.each { |k| ENV.delete k }
  
  # Set up our local configuration, deps, and load path.
  
  load "config/basic.rb"
  require "boxen/config"
  
  config = Boxen::Config.load
  input  = $stdin.read
  attrs  = Hash[input.split($/).map { |l| l.split("=") }]
  # find GitHub or GitHub Enterprise host
  ghhost = URI(config.ghurl).host
  
  host_exp = Regexp.new "(^|\.)" + Regexp.escape(ghhost)
  if command == "get" && host_exp.match(attrs["host"])
    puts "username=#{config.token}"
    puts "password=x-oauth-basic"
  else
    require "open4"
  
    fallback   = ENV["BOXEN_GIT_CREDENTIAL_FALLBACK"]
    fallback ||= "#{config.homedir}/homebrew/bin/git-credential-osxkeychain"
  
    status = Open4.popen4 fallback, *ARGV do |pid, stdin, stdout, stderr|
      stdin.write input
      stdin.puts
  
      $stdout.write stdout.read
    end
  
    exit status.exitstatus
  end