brew/Library/Homebrew/postinstall.rb

old_trap = trap("INT") { exit! 130 }

require "global"
require "debrew"
require "fcntl"
require "socket"

begin
  error_pipe = UNIXSocket.open(ENV["HOMEBREW_ERROR_PIPE"], &:recv_io)
  error_pipe.fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC)

  trap("INT", old_trap)

  formula = ARGV.resolved_formulae.first
  formula.extend(Debrew::Formula) if ARGV.debug?
  formula.post_install
rescue Exception => e
  Marshal.dump(e, error_pipe)
  error_pipe.close
  exit! 1
end