module Gem

def self.freebsd_platform?
  RbConfig::CONFIG["host_os"].to_s.include?("bsd")
end

def URI(uri) # rubocop:disable Naming/MethodName
  Bundler::URI(uri)
end

def open_file_with_flock(path, &block)
  # read-write mode is used rather than read-only in order to support NFS
  mode = IO::RDWR | IO::APPEND | IO::CREAT | IO::BINARY
  mode |= IO::SHARE_DELETE if IO.const_defined?(:SHARE_DELETE)
  File.open(path, mode) do |io|
    begin
      io.flock(File::LOCK_EX)
    rescue Errno::ENOSYS, Errno::ENOTSUP
    end
    yield io
  end
end

def open_file_with_lock(path, &block)
  file_lock = "#{path}.lock"
  open_file_with_flock(file_lock, &block)
ensure
  FileUtils.rm_f file_lock
end