require 'formula'

class Fontforge < Formula
  homepage 'http://fontforge.sourceforge.net'
  url 'http://downloads.sourceforge.net/project/fontforge/fontforge-source/fontforge_full-20120731-b.tar.bz2'
  sha1 'b520f532b48e557c177dffa29120225066cc4e84'

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

  env :std

  option 'without-python', 'Build without Python'
  option 'with-x', 'Build with X'
  option 'with-cairo', 'Build with Cairo'
  option 'with-pango', 'Build with Pango'
  option 'with-libspiro', 'Build with Spiro spline support'

  depends_on 'gettext'
  depends_on :xcode # Because: #include </Developer/Headers/FlatCarbon/Files.h>

  depends_on :x11 if build.include? "with-x"
  depends_on 'cairo' if build.include? "with-cairo"
  depends_on 'pango' if build.include? "with-pango"
  depends_on 'libspiro' if build.include? "with-libspiro"

  fails_with :llvm do
    build 2336
    cause "Compiling cvexportdlg.c fails with error: initializer element is not constant"
  end

  def install
    # Reason: Designed for the 10.7 SDK because it uses FlatCarbon.
    #         MACOSX_DEPLOYMENT_TARGET fixes ensuing Python 10.7 vs 10.8 clash.
    # Discussed: https://github.com/mxcl/homebrew/pull/14097
    # Reported:  Not yet.
    if MacOS.version >= :mountain_lion
      ENV.macosxsdk("10.7")
      ENV.append "CFLAGS", "-isysroot #{MacOS.sdk_path(10.7)}"
      ENV["MACOSX_DEPLOYMENT_TARGET"] = "10.8"
    end

    args = ["--prefix=#{prefix}",
            "--enable-double",
            "--without-freetype-bytecode"]

    if build.include? "without-python"
      args << "--without-python"
    else
      python_prefix = `python-config --prefix`.strip
      python_version = `python-config --libs`.match('-lpython(\d+\.\d+)').captures.at(0)
      args << "--with-python-headers=#{python_prefix}/include/python#{python_version}"
      args << "--with-python-lib=-lpython#{python_version}"
      args << "--enable-pyextension"
    end

    # Fix linking to correct Python library
    ENV.prepend "LDFLAGS", "-L#{python_prefix}/lib" unless build.include? "without-python"
    # Fix linker error; see: http://trac.macports.org/ticket/25012
    ENV.append "LDFLAGS", "-lintl"
    # Reset ARCHFLAGS to match how we build
    ENV["ARCHFLAGS"] = MacOS.prefer_64_bit? ? "-arch x86_64" : "-arch i386"

    args << "--without-cairo" unless build.include? "with-cairo"
    args << "--without-pango" unless build.include? "with-pango"

    system "./configure", *args

    # Fix hard-coded install locations that don't respect the target bindir
    inreplace "Makefile" do |s|
      s.gsub! "/Applications", "$(prefix)"
      s.gsub! "ln -s /usr/local/bin/fontforge", "ln -s $(bindir)/fontforge"
    end

    # Fix install location of Python extension; see:
    # http://sourceforge.net/mailarchive/message.php?msg_id=26827938
    inreplace "Makefile" do |s|
      s.gsub! "python setup.py install --prefix=$(prefix) --root=$(DESTDIR)", "python setup.py install --prefix=$(prefix)"
    end

    # Fix hard-coded include file paths. Reported usptream:
    # http://sourceforge.net/mailarchive/forum.php?thread_name=C1A32103-A62D-468B-AD8A-A8E0E7126AA5%40smparkes.net&forum_name=fontforge-devel
    # https://trac.macports.org/ticket/33284
    if MacOS::Xcode.version >= '4.4'
      header_prefix = "#{MacOS.sdk_path(10.7)}/Developer"
    else
      header_prefix = MacOS::Xcode.prefix
    end
    inreplace %w(fontforge/macbinary.c fontforge/startui.c gutils/giomime.c) do |s|
      s.gsub! "/Developer", header_prefix
    end

    system "make"
    system "make install"
  end

  def which_python
    "python" + `python -c 'import sys;print(sys.version[:3])'`.strip
  end

  def test
    system "#{bin}/fontforge", "-version"
  end

  def caveats
    x_caveats = <<-EOS.undent
      fontforge is an X11 application.

      To install the Mac OS X wrapper application run:
        brew linkapps
      or:
        ln -s #{prefix}/FontForge.app /Applications
    EOS

    python_caveats = <<-EOS.undent

      To use the Python extension with non-homebrew Python, you need to amend your
      PYTHONPATH like so:
        export PYTHONPATH=#{HOMEBREW_PREFIX}/lib/#{which_python}/site-packages:$PYTHONPATH
    EOS

    s = ""
    s += x_caveats if build.include? "with-x"
    s += python_caveats unless build.include? "without-python"
    return s
  end
end