%global pkgvers 0
%global scdate0 20241220
%global schash0 3a1ad461ff9e75349a3ac3d8eafb44883db4d824
%global branch0 main
%global source0 https://github.com/facebookresearch/faiss.git

%global sshort0 %{expand:%%{lua:print(('%{schash0}'):sub(1,8))}}

%global vcu_maj 12
%global vcu_min 6

Name:           faiss
Version:        %(curl -s https://raw.githubusercontent.com/facebookresearch/faiss/main/CMakeLists.txt | grep VERSION | grep -v cmake | awk '{print $2}' | sed 's|.[a-z,A-Z]||')
Release:        %{scdate0}.%{pkgvers}.git%{sshort0}.cu%{vcu_maj}_%{vcu_min}%{?dist}
Summary:        Efficient similarity search and clustering
License:        MIT

URL:            https://github.com/facebookresearch/faiss

BuildRequires:  doxygen cmake gcc-c++ swig git
BuildRequires:  python3-setuptools python3-devel
BuildRequires:  python3-numpy openblas-devel openblas-openmp

%global have_cuda 1
%global have_cuda_gcc 1

%ifarch aarch64
%global gpu_target_arch "50;52;53;60;61;62;70;75;80;86;90"
%else
%global gpu_target_arch "50;52;60;61;70;75;80;86;90"
%endif

%bcond_without cuda
%if %{without cuda}
%global have_cuda 0
%endif

%if %{have_cuda}
%if %{have_cuda_gcc}
%if (0%{?fedora} > 34) || (0%{?rhel} > 8)
BuildRequires:  cuda-gcc-c++
%endif
%endif
BuildRequires:  cuda-nvcc-%{vcu_maj}-%{vcu_min}
BuildRequires:  cuda-nvtx-%{vcu_maj}-%{vcu_min}
BuildRequires:  cuda-cudart-devel-%{vcu_maj}-%{vcu_min}
BuildRequires:  cuda-nvml-devel-%{vcu_maj}-%{vcu_min}
BuildRequires:  cuda-nvrtc-devel-%{vcu_maj}-%{vcu_min}
BuildRequires:  cuda-driver-devel-%{vcu_maj}-%{vcu_min}
BuildRequires:  cuda-profiler-api-%{vcu_maj}-%{vcu_min}
BuildRequires:  libcublas-devel-%{vcu_maj}-%{vcu_min}
BuildRequires:  libcurand-devel-%{vcu_maj}-%{vcu_min}
%endif

%global __cmake_in_source_build 1

%description
Faiss is a library for efficient similarity search and clustering
of dense vectors. It contains algorithms that search in sets of
vectors of any size, up to ones that possibly do not fit in RAM.

%package        devel
Summary:        Development files for %{name}
Requires:       %{name} = %{version}-%{release}

%description    devel
This package contains development files for %{name}.

%package        python3
Summary:        Python files for %{name}
Requires:       %{name} = %{version}-%{release}

%description    python3
This package contains python files for %{name}.


%prep
%setup -T -c -n %{name}
git clone --depth 1 -n -b %{branch0} %{source0} .
git fetch --depth 1 origin %{schash0}
git reset --hard %{schash0}
git log --format=fuller
# fixes
sed -i 's|cublas.h|cublas_v2.h|' c_api/gpu/DeviceUtils_c.h
# cmake
sed -i 's|3.23.1|3.20.2|' CMakeLists.txt
# allow custom host compiler
sed -i '/CMAKE_CUDA_HOST_COMPILER/d' CMakeLists.txt
%if 0%{?rhel}
sed -i '/-doxygen/d' faiss/python/CMakeLists.txt
%endif


%build
mkdir build
pushd build
%global optflags %(echo %{optflags} -w -fpermissive)
%cmake .. -Wno-dev \
       -DCMAKE_SKIP_RPATH=ON \
       -DCMAKE_VERBOSE_MAKEFILE=OFF \
       -DCMAKE_BUILD_TYPE=RelWithDebInfo \
       -DCMAKE_INSTALL_LIBDIR=%{_lib} \
       -DFAISS_OPT_LEVEL="generic" \
       -DFAISS_ENABLE_PYTHON=ON \
       -DFAISS_ENABLE_C_API=ON \
       -DBUILD_TESTING=OFF \
       -DBLAS_LIBRARIES="openblaso" \
%if %{have_cuda}
       -DFAISS_ENABLE_GPU=ON \
%if %{have_cuda_gcc}
%if (0%{?fedora} > 34) || (0%{?rhel} > 8)
       -DCMAKE_CUDA_HOST_COMPILER="%{_bindir}/cuda-gcc" \
%endif
%endif
       -DCMAKE_CUDA_FLAGS="--compiler-options -fPIC -Wno-deprecated-gpu-targets -allow-unsupported-compiler" \
       -DCMAKE_CUDA_COMPILER="/usr/local/cuda-%{vcu_maj}.%{vcu_min}/bin/nvcc" \
       -DCMAKE_CUDA_ARCHITECTURES=%{gpu_target_arch}
%else
       -DFAISS_ENABLE_GPU=OFF
%endif
make %{?_smp_mflags}
popd


%install
pushd build
make install DESTDIR=%{buildroot}
popd
pushd build/faiss/python
%if 0%{?rhel} == 8
%global __os_install_post %(echo '%{__os_install_post}' | sed -e 's!/usr/lib[^[:space:]]*/brp-python-bytecompile[[:space:]].*$!!g')
%{__python3} setup.py install --root %{buildroot} --no-compile
%else
%{__python3} setup.py install --root %{buildroot}
%endif

popd
install -m755 build/c_api/*_c.so %{buildroot}/%{_libdir}/
install -m755 build/faiss/python/libfaiss_python_callbacks.so %{buildroot}/%{_libdir}/


%files
%doc README.md CONTRIBUTING.md
%doc demos
%doc tutorial
# % {_bindir}/*
%license LICENSE
%exclude %{_libdir}/libfaiss_python_callbacks.so
%{_libdir}/lib*.so*

%files devel
%{_includedir}/*
%{_datadir}/*

%files python3
%{python3_sitelib}/*
%{_libdir}/libfaiss_python_callbacks.so


%changelog
* Fri Mar 29 2019 Balint Cristian <cristian.balint@gmail.com>
- github upstream releases