class Fontforge < Formula
  desc "Command-line outline and bitmap font editor/converter"
  homepage "https://fontforge.github.io"
  url "https://github.com/fontforge/fontforge/archive/20161001.tar.gz"
  sha256 "103af2a6c8799390f20790e44064ea4f9ec6795255b7a065b3f9a352c2723c40"
  revision 1
  head "https://github.com/fontforge/fontforge.git"

  bottle do
    sha256 "72e15395857641863a4a1b93555fdc6d552f03405c795a6d676a1748f76c3d09" => :sierra
    sha256 "0b557d644c23b8d72b958f49f3fdc6ab5463a34d495774fd0123c0104c1d36f8" => :el_capitan
    sha256 "4eec14c891a70ea9d888011770df9a6e0d754c1bd4a1fb1f63a6955228676264" => :yosemite
  end

  option "with-giflib", "Build with GIF support"
  option "with-extra-tools", "Build with additional font tools"

  deprecated_option "with-gif" => "with-giflib"

  # Autotools are required to build from source in all releases.
  depends_on "autoconf" => :build
  depends_on "automake" => :build
  depends_on "pkg-config" => :build
  depends_on "libtool" => :run
  depends_on "gettext"
  depends_on "pango"
  depends_on "cairo"
  depends_on "fontconfig"
  depends_on "libpng" => :recommended
  depends_on "jpeg" => :recommended
  depends_on "libtiff" => :recommended
  depends_on "giflib" => :optional
  depends_on "libspiro" => :optional
  depends_on :python if MacOS.version <= :snow_leopard

  resource "gnulib" do
    url "git://git.savannah.gnu.org/gnulib.git",
        :revision => "29ea6d6fe2a699a32edbe29f44fe72e0c253fcee"
  end

  def install
    # Don't link libraries to libpython, but do link binaries that expect
    # to embed a python interpreter
    # https://github.com/fontforge/fontforge/issues/2353#issuecomment-121009759
    ENV["PYTHON_CFLAGS"] = `python-config --cflags`.chomp
    ENV["PYTHON_LIBS"] = "-undefined dynamic_lookup"
    python_libs = `python2.7-config --ldflags`.chomp
    inreplace "fontforgeexe/Makefile.am" do |s|
      oldflags = s.get_make_var "libfontforgeexe_la_LDFLAGS"
      s.change_make_var! "libfontforgeexe_la_LDFLAGS", "#{python_libs} #{oldflags}"
    end

    args = %W[
      --prefix=#{prefix}
      --disable-silent-rules
      --disable-dependency-tracking
      --with-pythonbinary=#{which "python2.7"}
      --without-x
    ]

    args << "--without-libpng" if build.without? "libpng"
    args << "--without-libjpeg" if build.without? "jpeg"
    args << "--without-libtiff" if build.without? "libtiff"
    args << "--without-giflib" if build.without? "giflib"
    args << "--without-libspiro" if build.without? "libspiro"

    # Fix linker error; see: https://trac.macports.org/ticket/25012
    ENV.append "LDFLAGS", "-lintl"

    # Reset ARCHFLAGS to match how we build
    ENV["ARCHFLAGS"] = "-arch #{MacOS.preferred_arch}"

    # Bootstrap in every build: https://github.com/fontforge/fontforge/issues/1806
    resource("gnulib").fetch
    system "./bootstrap",
           "--gnulib-srcdir=#{resource("gnulib").cached_download}",
           "--skip-git"
    system "./configure", *args
    system "make"
    system "make", "install"

    # The app here is not functional.
    # If you want GUI/App support, check the caveats to see how to get it.
    (pkgshare/"osx/FontForge.app").rmtree

    if build.with? "extra-tools"
      cd "contrib/fonttools" do
        system "make"
        bin.install Dir["*"].select { |f| File.executable? f }
      end
    end
  end

  def caveats; <<-EOS.undent
    This formula only installs the command line utilities.

    FontForge.app can be downloaded directly from the website:
      https://fontforge.github.io

    Alternatively, install with Homebrew-Cask:
      brew cask install fontforge
    EOS
  end

  test do
    system bin/"fontforge", "-version"
    system "python", "-c", "import fontforge"
  end
end