opencv: migrate from homebrew/core

Formula/opencv.rb

@@ -0,0 +1,113 @@
+class Opencv < Formula
+  desc "Open source computer vision library"
+  homepage "http://opencv.org/"
+  url "https://github.com/opencv/opencv/archive/3.3.0.tar.gz"
+  sha256 "95029eb5578af3b20b8c7f8f6f59db1b827c2d5aaaa74b6becb1de647cbdda5a"
+  revision 2
+
+  option "without-python", "Build without python2 support"
+
+  depends_on "cmake" => :build
+  depends_on "pkg-config" => :build
+  depends_on "eigen"
+  depends_on "ffmpeg"
+  depends_on "jpeg"
+  depends_on "libpng"
+  depends_on "libtiff"
+  depends_on "openexr"
+  depends_on :python => :recommended if MacOS.version <= :snow_leopard
+  depends_on :python3 => :recommended
+  depends_on "numpy" if build.with?("python") || build.with?("python3")
+
+  needs :cxx11
+
+  resource "contrib" do
+    url "https://github.com/opencv/opencv_contrib/archive/3.3.0.tar.gz"
+    sha256 "e94acf39cd4854c3ef905e06516e5f74f26dddfa6477af89558fb40a57aeb444"
+  end
+
+  def install
+    ENV.cxx11
+
+    resource("contrib").stage buildpath/"opencv_contrib"
+
+    # Reset PYTHONPATH, workaround for https://github.com/Homebrew/homebrew-science/pull/4885
+    ENV.delete("PYTHONPATH")
+
+    args = std_cmake_args + %W[
+      -DCMAKE_OSX_DEPLOYMENT_TARGET=
+      -DBUILD_JASPER=OFF
+      -DBUILD_JPEG=ON
+      -DBUILD_OPENEXR=OFF
+      -DBUILD_PERF_TESTS=OFF
+      -DBUILD_PNG=OFF
+      -DBUILD_TESTS=OFF
+      -DBUILD_TIFF=OFF
+      -DBUILD_ZLIB=OFF
+      -DBUILD_opencv_java=OFF
+      -DOPENCV_ENABLE_NONFREE=ON
+      -DOPENCV_EXTRA_MODULES_PATH=#{buildpath}/opencv_contrib/modules
+      -DWITH_1394=OFF
+      -DWITH_CUDA=OFF
+      -DWITH_EIGEN=ON
+      -DWITH_FFMPEG=ON
+      -DWITH_GPHOTO2=OFF
+      -DWITH_GSTREAMER=OFF
+      -DWITH_JASPER=OFF
+      -DWITH_OPENEXR=ON
+      -DWITH_OPENGL=OFF
+      -DWITH_QT=OFF
+      -DWITH_TBB=OFF
+      -DWITH_VTK=OFF
+    ]
+
+    args << "-DBUILD_opencv_python2=" + (build.with?("python") ? "ON" : "OFF")
+    args << "-DBUILD_opencv_python3=" + (build.with?("python3") ? "ON" : "OFF")
+
+    if build.with? "python"
+      py_prefix = `python-config --prefix`.chomp
+      py_lib = "#{py_prefix}/lib"
+      args << "-DPYTHON2_EXECUTABLE=#{which "python"}"
+      args << "-DPYTHON2_LIBRARY=#{py_lib}/libpython2.7.dylib"
+      args << "-DPYTHON2_INCLUDE_DIR=#{py_prefix}/include/python2.7"
+    end
+
+    if build.with? "python3"
+      py3_config = `python3-config --configdir`.chomp
+      py3_include = `python3 -c "import distutils.sysconfig as s; print(s.get_python_inc())"`.chomp
+      py3_version = Language::Python.major_minor_version "python3"
+      args << "-DPYTHON3_EXECUTABLE=#{which "python3"}"
+      args << "-DPYTHON3_LIBRARY=#{py3_config}/libpython#{py3_version}.dylib"
+      args << "-DPYTHON3_INCLUDE_DIR=#{py3_include}"
+    end
+
+    if build.bottle?
+      args += %w[-DENABLE_SSSE3=OFF -DENABLE_SSE41=OFF -DENABLE_SSE42=OFF
+                 -DENABLE_AVX=OFF -DENABLE_AVX2=OFF]
+    end
+
+    mkdir "build" do
+      system "cmake", "..", *args
+      system "make"
+      system "make", "install"
+    end
+  end
+
+  test do
+    (testpath/"test.cpp").write <<-EOS.undent
+      #include <opencv/cv.h>
+      #include <iostream>
+      int main() {
+        std::cout << CV_VERSION << std::endl;
+        return 0;
+      }
+    EOS
+    system ENV.cxx, "test.cpp", "-I#{include}", "-L#{lib}", "-o", "test"
+    assert_equal `./test`.strip, version.to_s
+
+    Language::Python.each_python(build) do |python, _version|
+      assert_match version.to_s,
+                   shell_output("#{python} -c 'import cv2; print(cv2.__version__)'")
+    end
+  end
+end

tap_migrations.json

@@ -38,7 +38,6 @@
   "n98-magerun": "homebrew/php",
   "newick-utils": "homebrew/science",
   "nlopt": "homebrew/science",
-  "opencv": "homebrew/science",
   "openfst": "homebrew/science",
   "opengrm-ngram": "homebrew/science",
   "osxfuse": "caskroom/cask",