class Graphviz < Formula
  desc "Graph visualization software from AT&T and Bell Labs"
  homepage "https://www.graphviz.org/"
  # versioned URLs are missing upstream as of 16 Dec 2017
  url "https://www.mirrorservice.org/sites/distfiles.macports.org/graphviz/graphviz-2.40.1.tar.gz"
  mirror "https://fossies.org/linux/misc/graphviz-2.40.1.tar.gz"
  sha256 "ca5218fade0204d59947126c38439f432853543b0818d9d728c589dfe7f3a421"
  version_scheme 1

  bottle do
    rebuild 2
    sha256 "554a0f729bf393301fb3fd796d771a63c51871d6aaf498a7af6c7f98a64979bd" => :mojave
    sha256 "769e9c92c5e08e803b54d2940df74aeb7202e5bc5019eb602d36116ea7cddcf3" => :high_sierra
    sha256 "4267fe0d22373837bc22dfca35e8a925ed660e3b403b76af791a30fc074130c9" => :sierra
  end

  head do
    url "https://gitlab.com/graphviz/graphviz.git"

    depends_on "autoconf" => :build
    depends_on "automake" => :build
    depends_on "libtool" => :build
  end

  depends_on "pkg-config" => :build
  depends_on "gd"
  depends_on "gts"
  depends_on "libpng"
  depends_on "libtool"

  def install
    # Only needed when using superenv, which causes qfrexp and qldexp to be
    # falsely detected as available. The problem is triggered by
    #   args << "-#{ENV["HOMEBREW_OPTIMIZATION_LEVEL"]}"
    # during argument refurbishment of cflags.
    # https://github.com/Homebrew/brew/blob/ab060c9/Library/Homebrew/shims/super/cc#L241
    # https://github.com/Homebrew/legacy-homebrew/issues/14566
    # Alternative fixes include using stdenv or using "xcrun make"
    inreplace "lib/sfio/features/sfio", "lib qfrexp\nlib qldexp\n", "" unless build.head?

    args = %W[
      --disable-debug
      --disable-dependency-tracking
      --prefix=#{prefix}
      --disable-php
      --disable-swig
      --with-quartz
      --without-freetype2
      --without-qt
      --without-x
      --with-gts
    ]

    if build.head?
      system "./autogen.sh", *args
    else
      system "./configure", *args
    end
    system "make", "install"

    (bin/"gvmap.sh").unlink
  end

  test do
    (testpath/"sample.dot").write <<~EOS
      digraph G {
        a -> b
      }
    EOS

    system "#{bin}/dot", "-Tpdf", "-o", "sample.pdf", "sample.dot"
  end
end