allow not include extras with his 500 MB

opencv.spec

@@ -1,5 +1,6 @@
 %undefine __cmake_in_source_build
 %bcond_without  tests
+%bcond_without  extras
 %bcond_with     ffmpeg
 %bcond_without  gstreamer
 %bcond_with     eigen2
@@ -63,7 +64,9 @@ URL:            https://opencv.org
 #
 Source0:        %{name}-clean-%{version}.tar.gz
 Source1:        %{name}_contrib-clean-%{version}.tar.gz
+%{?with_extras:
 Source2:        %{name}_extra-clean-%{version}.tar.gz
+}
 Source3:        face_landmark_model.dat.xz
 # from https://github.com/opencv/ade/archive/v0.1.1f.zip
 Source4:        b624b995ec9c439cbc2e9e6ee940d3a2-v0.1.1f.zip
@@ -239,7 +242,7 @@ distribution, since the library maintains binary compatibility, and tries
 to provide decent performance and stability.
 
 %prep
-%setup -q -a1 -a2
+%setup -q -a1 %{?with_extras:-a2}
 %if 1
 # we don't use pre-built contribs except quirc
 pushd 3rdparty
@@ -331,7 +334,7 @@ install -pm 0644 %{SOURCE4} .cache/ade/
  -DWITH_OPENMP=ON \
  -DOPENCV_CONFIG_INSTALL_PATH=%{_lib}/cmake/OpenCV \
  -DOPENCV_GENERATE_PKGCONFIG=ON \
- -DOPENCV_TEST_DATA_PATH=opencv_extra-%{version}/testdata \
+%{?with_extras: -DOPENCV_TEST_DATA_PATH=opencv_extra-%{version}/testdata} \
  %{?with_gdcm: -DWITH_GDCM=ON } \
  %{?with_libmfx: -DWITH_MFX=ON } \
  %{?with_clp: -DWITH_CLP=ON } \