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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/2.4.2/OpenCV-2.4.2.tar.bz2'
sha1 '96ff27b87e0f028d1d16201afebabec4e0c72367'
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'
# 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
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