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.org/' url 'http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.4.3/OpenCV-2.4.3.tar.bz2' sha1 '982be2c3e52dfc3e9d14692c60bc856b2b766be2' option '32-bit' option 'with-qt', 'Build the Qt4 backend to HighGUI' option 'with-tbb', 'Enable parallel code in OpenCV using Intel TBB' depends_on 'cmake' => :build depends_on 'pkg-config' => :build depends_on 'numpy' => :python depends_on 'eigen' => :optional depends_on 'libtiff' => :optional depends_on 'jasper' => :optional depends_on 'tbb' => :optional depends_on 'qt' if build.include? 'with-qt' depends_on :libpng # 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. Will depend on openexr if it's installed. def install args = std_cmake_args + %w[ -DWITH_CUDA=OFF -DBUILD_ZLIB=OFF -DBUILD_TIFF=OFF -DBUILD_PNG=OFF -DBUILD_JPEG=OFF -DBUILD_JASPER=OFF -DBUILD_TESTS=OFF -DBUILD_PERF_TESTS=OFF ] if build.build_32_bit? args << "-DCMAKE_OSX_ARCHITECTURES=i386" args << "-DOPENCV_EXTRA_C_FLAGS='-arch i386 -m32'" args << "-DOPENCV_EXTRA_CXX_FLAGS='-arch i386 -m32'" end args << '-DWITH_QT=ON' if build.include? 'with-qt' args << '-DWITH_TBB=ON' if build.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'" if !MacOS::CLT.installed? and python_prefix.start_with? '/System/Library' # For Xcode-only systems, the headers of system's python are inside of Xcode args << "-DPYTHON_INCLUDE_DIR='#{MacOS.sdk_path}/System/Library/Frameworks/Python.framework/Versions/2.7/Headers'" else args << "-DPYTHON_INCLUDE_DIR='#{python_prefix}/Headers'" end 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'" args << '..' mkdir 'macbuild' do system 'cmake', *args system "make" system "make install" end 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