class Qwtpolar < Formula
  desc "Library for displaying values on a polar coordinate system"
  homepage "http://qwtpolar.sourceforge.net/"
  url "https://downloads.sf.net/project/qwtpolar/qwtpolar/1.1.0/qwtpolar-1.1.0.tar.bz2"
  sha256 "e45a1019b481f52a63483c536c5ef3225f1cced04abf45d7d0ff8e06d30e2355"

  option "with-examples", "Install source code for example apps"
  option "without-plugin", "Skip building the Qt Designer plugin"

  depends_on "qt"
  depends_on "qwt"

  # Update designer plugin linking back to qwtpolar framework/lib after install
  # See: https://sourceforge.net/p/qwtpolar/patches/2/
  patch :DATA

  def install
    cd "doc" do
      doc.install "html"
      man3.install Dir["man/man3/{q,Q}wt*"]
    end
    # Remove leftover doxygen files, so they don't get installed
    rm_r "doc"

    libexec.install Dir["examples/*"] if build.with? "examples"

    inreplace "qwtpolarconfig.pri" do |s|
      s.gsub! /^(\s*)QWT_POLAR_INSTALL_PREFIX\s*=\s*(.*)$/,
              "\\1QWT_POLAR_INSTALL_PREFIX=#{prefix}"
      s.sub! /\+(=\s*QwtPolarDesigner)/, "-\\1" if build.without? "plugin"
      # Don't build examples now, since linking flawed until qwtpolar installed
      s.sub! /\+(=\s*QwtPolarExamples)/, "-\\1"
    end

    args = %W[-config release -spec]
    # On Mavericks we want to target libc++, this requires a unsupported/macx-clang-libc++ flag
    if ENV.compiler == :clang && MacOS.version >= :mavericks
      args << "unsupported/macx-clang-libc++"
    else
      args << "macx-g++"
    end

    ENV["QMAKEFEATURES"] = "#{Formula["qwt"].opt_prefix}/features"
    system "qmake", *args
    system "make"
    system "make", "install"

    # symlink Qt Designer plugin (note: not removed on qwtpolar formula uninstall)
    ln_sf prefix/"plugins/designer/libqwt_polar_designer_plugin.dylib",
          Formula["qt"].opt_prefix/"plugins/designer/" if build.with? "plugin"
  end
end

__END__
diff --git a/designer/designer.pro b/designer/designer.pro
index 24770fd..3ff0761 100644
--- a/designer/designer.pro
+++ b/designer/designer.pro
@@ -75,6 +75,16 @@ contains(QWT_POLAR_CONFIG, QwtPolarDesigner) {

     target.path = $${QWT_POLAR_INSTALL_PLUGINS}
     INSTALLS += target
+
+    macx {
+        contains(QWT_POLAR_CONFIG, QwtPolarFramework) {
+            QWTP_LIB = qwtpolar.framework/Versions/$${QWT_POLAR_VER_MAJ}/qwtpolar
+        }
+        else {
+            QWTP_LIB = libqwtpolar.$${QWT_POLAR_VER_MAJ}.dylib
+        }
+        QMAKE_POST_LINK = install_name_tool -change $${QWTP_LIB} $${QWT_POLAR_INSTALL_LIBS}/$${QWTP_LIB} $(DESTDIR)$(TARGET)
+    }
 }
 else {
     TEMPLATE        = subdirs # do nothing