require 'formula'

class Openssl < Formula
  homepage 'http://openssl.org'
  url 'https://www.openssl.org/source/openssl-1.0.1g.tar.gz'
  mirror 'http://mirrors.ibiblio.org/openssl/source/openssl-1.0.1g.tar.gz'
  sha256 '53cb818c3b90e507a8348f4f5eaedb05d8bfe5358aabb508b7263cc670c3e028'

  bottle do
    sha1 "d8c38bb2fe4dfd8930ea02f87d4b958a2a33b051" => :mavericks
    sha1 "536d1e6bd5e1321eb603b4ed1ad131ea86a2794c" => :mountain_lion
    sha1 "f12f352e67e5b131c1935040f8d2ca24107ebfca" => :lion
  end

  option :universal

  depends_on "makedepend" => :build

  keg_only :provided_by_osx,
    "The OpenSSL provided by OS X is too old for some software."

  def arch_args
    {
      :x86_64 => %w[darwin64-x86_64-cc enable-ec_nistp-64_gcc_128],
      :i386   => %w[darwin-i386-cc],
    }
  end

  def configure_args; %W[
      --prefix=#{prefix}
      --openssldir=#{openssldir}
      zlib-dynamic
      shared
      enable-cms
    ]
  end

  def install
    if build.universal?
      ENV.permit_arch_flags
      archs = Hardware::CPU.universal_archs
    elsif MacOS.prefer_64_bit?
      archs = [Hardware::CPU.arch_64_bit]
    else
      archs = [Hardware::CPU.arch_32_bit]
    end

    dirs = []

    archs.each do |arch|
      if build.universal?
        dir = "build-#{arch}"
        dirs << dir
        mkdir dir
        mkdir "#{dir}/engines"
        system "make", "clean"
      end

      ENV.deparallelize
      system "perl", "./Configure", *(configure_args + arch_args[arch])
      system "make", "depend"
      system "make"
      system "make", "test"

      if build.universal?
        cp Dir["*.?.?.?.dylib", "*.a", "apps/openssl"], dir
        cp Dir["engines/**/*.dylib"], "#{dir}/engines"
      end
    end

    system "make", "install", "MANDIR=#{man}", "MANSUFFIX=ssl"

    if build.universal?
      %w[libcrypto libssl].each do |libname|
        system "lipo", "-create", "#{dirs.first}/#{libname}.1.0.0.dylib",
                                  "#{dirs.last}/#{libname}.1.0.0.dylib",
                       "-output", "#{lib}/#{libname}.1.0.0.dylib"
        system "lipo", "-create", "#{dirs.first}/#{libname}.a",
                                  "#{dirs.last}/#{libname}.a",
                       "-output", "#{lib}/#{libname}.a"
      end

      Dir.glob("#{dirs.first}/engines/*.dylib") do |engine|
        libname = File.basename(engine)
        system "lipo", "-create", "#{dirs.first}/engines/#{libname}",
                                  "#{dirs.last}/engines/#{libname}",
                       "-output", "#{lib}/engines/#{libname}"
      end

      system "lipo", "-create", "#{dirs.first}/openssl",
                                "#{dirs.last}/openssl",
                     "-output", "#{bin}/openssl"
    end
  end

  def openssldir
    etc/"openssl"
  end

  def post_install
    keychains = %w[
      /Library/Keychains/System.keychain
      /System/Library/Keychains/SystemRootCertificates.keychain
    ]

    openssldir.mkpath
    (openssldir/"cert.pem").atomic_write `security find-certificate -a -p #{keychains.join(" ")}`
  end

  def caveats; <<-EOS.undent
    A CA file has been bootstrapped using certificates from the system
    keychain. To add additional certificates, place .pem files in
      #{openssldir}/certs

    and run
      #{opt_bin}/c_rehash
    EOS
  end

  test do
    (testpath/'testfile.txt').write("This is a test file")
    expected_checksum = "91b7b0b1e27bfbf7bc646946f35fa972c47c2d32"
    system "#{bin}/openssl", 'dgst', '-sha1', '-out', 'checksum.txt', 'testfile.txt'
    open("checksum.txt") do |f|
      checksum = f.read(100).split("=").last.strip
      assert_equal checksum, expected_checksum
    end
  end
end