my-boxen/script/boxen-git-credential

#!/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"

# 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