class Proj < Formula
  desc "Cartographic Projections Library"
  homepage "https://proj4.org/"
  url "https://download.osgeo.org/proj/proj-6.1.0.tar.gz"
  sha256 "676165c54319d2f03da4349cbd7344eb430b225fe867a90191d848dc64788008"

  bottle do
    sha256 "63be7d4fa4555300a5b64fa243f1b22597ae0622b0eaa88397919dd102dc83e1" => :mojave
    sha256 "baa0d9bbe0f5a22baaa29c4dfff3cadfbd070bb3072fc401217f7f9bf130d95f" => :high_sierra
    sha256 "df7076eda0eb6e27a90ccd3db0746ca42072154e20e1a054301af66ae32d1a34" => :sierra
  end

  head do
    url "https://github.com/OSGeo/proj.4.git"
    depends_on "autoconf" => :build
    depends_on "automake" => :build
    depends_on "libtool" => :build
  end

  depends_on "pkg-config" => :build

  conflicts_with "blast", :because => "both install a `libproj.a` library"

  skip_clean :la

  # The datum grid files are required to support datum shifting
  resource "datumgrid" do
    url "https://download.osgeo.org/proj/proj-datumgrid-1.8.zip"
    sha256 "b9838ae7e5f27ee732fb0bfed618f85b36e8bb56d7afb287d506338e9f33861e"
  end

  def install
    (buildpath/"nad").install resource("datumgrid")

    system "./autogen.sh" if build.head?
    system "./configure", "--disable-dependency-tracking",
                          "--prefix=#{prefix}"
    system "make", "install"
  end

  test do
    (testpath/"test").write <<~EOS
      45d15n 71d07w Boston, United States
      40d40n 73d58w New York, United States
      48d51n 2d20e Paris, France
      51d30n 7'w London, England
    EOS
    match = <<~EOS
      -4887590.49\t7317961.48 Boston, United States
      -5542524.55\t6982689.05 New York, United States
      171224.94\t5415352.81 Paris, France
      -8101.66\t5707500.23 London, England
    EOS

    output = shell_output("#{bin}/proj +proj=poly +ellps=clrk66 -r #{testpath}/test")
    assert_equal match, output
  end
end