require 'formula' def which_python "python" + `python -c 'import sys;print(sys.version[:3])'`.strip end def site_package_dir "lib/#{which_python}/site-packages" end class Opencv < Formula homepage 'http://opencv.willowgarage.com/wiki/' url 'http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.4.1/OpenCV-2.4.1.tar.bz2' sha1 'bc6f23c62c8e3e0746f6f95067d54340d12aed56' depends_on 'cmake' => :build depends_on 'pkg-config' => :build depends_on 'libtiff' => :optional depends_on 'jasper' => :optional depends_on 'tbb' => :optional depends_on 'qt' if ARGV.include? '--with-qt' depends_on 'numpy' => :python # Can also depend on ffmpeg, but this pulls in a lot of extra stuff that # you don't need unless you're doing video analysis, and some of it isn't # in Homebrew anyway. def options [ ["--32-bit", "Build 32-bit only."], ["--with-qt", "Build qt backend."], ["--with-tbb", "Build with TBB support."] ] end def install args = std_cmake_args args << "-DOPENCV_EXTRA_C_FLAGS='-arch i386 -m32'" if ARGV.build_32_bit? args << "-DWITH_QT=ON" if ARGV.include? "--with-qt" args << "-DWITH_TBB=ON" if ARGV.include? "--with-tbb" # The CMake `FindPythonLibs` Module is dumber than a bag of hammers when # more than one python installation is available---for example, it clings # to the Header folder of the system Python Framework like a drowning # sailor. # # This code was cribbed from the VTK formula and uses the output to # `python-config` to do the job FindPythonLibs should be doing in the first # place. python_prefix = `python-config --prefix`.strip # Python is actually a library. The libpythonX.Y.dylib points to this lib, too. if File.exist? "#{python_prefix}/Python" # Python was compiled with --framework: args << "-DPYTHON_LIBRARY='#{python_prefix}/Python'" args << "-DPYTHON_INCLUDE_DIR='#{python_prefix}/Headers'" else python_lib = "#{python_prefix}/lib/lib#{which_python}" if File.exists? "#{python_lib}.a" args << "-DPYTHON_LIBRARY='#{python_lib}.a'" else args << "-DPYTHON_LIBRARY='#{python_lib}.dylib'" end args << "-DPYTHON_INCLUDE_DIR='#{python_prefix}/include/#{which_python}'" end args << "-DPYTHON_PACKAGES_PATH='#{lib}/#{which_python}/site-packages'" system 'cmake', '.', *args system "make" system "make install" end def caveats; <<-EOS.undent The OpenCV Python module will not work until you edit your PYTHONPATH like so: export PYTHONPATH="#{HOMEBREW_PREFIX}/#{site_package_dir}:$PYTHONPATH" To make this permanent, put it in your shell's profile (e.g. ~/.profile). EOS end end