opencv: Split python module in separate package

mingw-w64-opencv/PKGBUILD

@@ -2,7 +2,8 @@
 
 _realname=opencv
 pkgbase=mingw-w64-${_realname}
-pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}"
+pkgname=("${MINGW_PACKAGE_PREFIX}-${_realname}"
+         "${MINGW_PACKAGE_PREFIX}-python-${_realname}")
 pkgver=4.6.0
 pkgrel=1
 pkgdesc="Open Source Computer Vision Library (mingw-w64)"
@@ -45,8 +46,7 @@ makedepends=("${MINGW_PACKAGE_PREFIX}-cc"
              "${MINGW_PACKAGE_PREFIX}-tiny-dnn"
              "${MINGW_PACKAGE_PREFIX}-vtk"
             )
-optdepends=("${MINGW_PACKAGE_PREFIX}-python-numpy: Python 3.x interface"
-            "${MINGW_PACKAGE_PREFIX}-qt5-base: for the HighGUI module"
+optdepends=("${MINGW_PACKAGE_PREFIX}-qt5-base: for the HighGUI module"
             "${MINGW_PACKAGE_PREFIX}-vtk: opencv_viz module"
             )
 source=("${_realname}-${pkgver}.tar.gz"::https://github.com/opencv/opencv/archive/${pkgver}.tar.gz
@@ -202,7 +202,7 @@ build() {
   ${MINGW_PREFIX}/bin/cmake --build .
 }
 
-package() {
+package_opencv() {
   cd "${srcdir}/build-${MSYSTEM}"
   DESTDIR=${pkgdir} ${MINGW_PREFIX}/bin/cmake --install .
 
@@ -211,4 +211,28 @@ package() {
     cp -r "${srcdir}"/${_realname}-${pkgver}/modules/${_module}/include/opencv2/${_module}/legacy \
       "${pkgdir}${MINGW_PREFIX}"/include/opencv4/opencv2/${_module}
   done
+
+  # Split Python bindings
+  rm -r "${pkgdir}${MINGW_PREFIX}"/lib/python3*
 }
+
+package_python-opencv() {
+  pkgdesc='Python bindings for OpenCV (mingw-w64)'
+  depends=("${MINGW_PACKAGE_PREFIX}-opencv"
+           "${MINGW_PACKAGE_PREFIX}-python-numpy")
+  unset optdepends
+
+  cd "${srcdir}/build-${MSYSTEM}"
+  DESTDIR=${pkgdir} ${MINGW_PREFIX}/bin/cmake --install modules/python3
+}
+
+# template start; name=mingw-w64-splitpkg-wrappers; version=1.0;
+# vim: set ft=bash :
+
+# generate wrappers
+for _name in "${pkgname[@]}"; do
+  _short="package_${_name#${MINGW_PACKAGE_PREFIX}-}"
+  _func="$(declare -f "${_short}")"
+  eval "${_func/#${_short}/package_${_name}}"
+done
+# template end;