require 'formula'
require 'set'

class Simh < Formula
  homepage 'http://simh.trailing-edge.com/'
  url 'http://simh.trailing-edge.com/sources/simhv39-0.zip'
  sha1 '1de3938f0dcb51d55b0e53aea8ae9769ccc57bdb'
  version '3.9-0'

  head 'https://github.com/simh/simh.git'

  # After 3.9-0 the project moves to https://github.com/simh/simh
  # It doesn't actually fail, but the makefile queries llvm-gcc -v --help a lot
  # to determine what flags to throw.  It is simply not designed for clang.
  # Remove at the next revision that will support clang (see github site).
  fails_with :clang do
    build 421
    cause 'The program is closely tied to gcc & llvm-gcc in this revision.'
  end

  def install
    ENV.deparallelize unless build.head?
    inreplace 'makefile', 'GCC = gcc', "GCC = #{ENV.cc}"
    inreplace 'makefile', 'CFLAGS_O = -O2', "CFLAGS_O = #{ENV.cflags}"
    system "make USE_NETWORK=1 all"
    bin.install Dir['BIN/*']
    docs = Dir['**/*.txt']
    Set.new(docs.map {|f| File.dirname(f) }).each do |d|
      mkpath doc+d
    end
    docs.each do |f|
      cp f, doc+f
    end
    (share+'simh/vax').install Dir['VAX/*.{bin,exe}']
  end
end