Homebrew formula to install DUNGEON 4.0

dungeon.rb

class Dungeon < Formula
  desc "the classic text adventure"
  homepage "https://github.com/GOFAI/dungeon"
  url "https://github.com/GOFAI/dungeon/archive/4.0.tar.gz"
  sha256 "be2217be9e23861f22c14c4395da272fca5fb08a1741f52fd393792908279bea"

  depends_on :fortran

  def install
    chdir "src" do
      # look for game files where homebrew installed them, not pwd
      inreplace "game.f" do |s|
        s.gsub! "FILE='dindx',STATUS='OLD',", "FILE='/usr/local/opt/dungeon/share/dindx',"
        s.gsub! "1      FORM='FORMATTED',ACCESS='SEQUENTIAL',ERR=1900)", "1     STATUS='OLD',FORM='FORMATTED',
        2       ACCESS='SEQUENTIAL',ERR=1900)"
        s.gsub! "FILE='dtext',STATUS='OLD',", "FILE='/usr/local/opt/dungeon/share/dtext',"
        s.gsub! "1      FORM='UNFORMATTED',ACCESS='DIRECT',", "1        STATUS='OLD',FORM='UNFORMATTED',ACCESS='DIRECT',"
      end
      system "make"
      bin.install "dungeon"
    end
    share.install "dindx"
    share.install "dtext"
    man.install "dungeon.txt"
    man.install "hints.txt"
  end
end