class Bundler::ProcessLock

def self.lock(bundle_path = Bundler.bundle_path)
  lock_file_path = File.join(bundle_path, "bundler.lock")
  has_lock = false
  File.open(lock_file_path, "w") do |f|
    f.flock(File::LOCK_EX)
    has_lock = true
    yield
    f.flock(File::LOCK_UN)
  end
rescue Errno::EACCES, Errno::ENOLCK, Errno::ENOTSUP, Errno::EPERM, Errno::EROFS
  # In the case the user does not have access to
  # create the lock file or is using NFS where
  # locks are not available we skip locking.
  yield
ensure
  FileUtils.rm_f(lock_file_path) if has_lock
end