%define kmod_name scoutfs
%define kmod_version @@VERSION@@
%define kmod_git_hash @@GITHASH@@
%define kmod_git_describe @@GITDESCRIBE@@
%define pkg_date %(date +%%Y%%m%%d)

# take kernel version or default to uname -r
%{!?kversion: %global kversion %(uname -r)}
%global kernel_version %{kversion}

%if 0%{?el7}
%global kernel_source() /usr/src/kernels/%{kernel_version}.$(arch)
%else
%global kernel_source() /usr/src/kernels/%{kernel_version}
%endif

%{!?_release: %global _release 0.%{pkg_date}git%{kmod_git_hash}}

%if 0%{?el7}
Name:           %{kmod_name}
%else
Name:           kmod-%{kmod_name}
%endif
Summary:        %{kmod_name} kernel module
Version:        %{kmod_version}
Release:        %{_release}%{?dist}
License:        GPLv2
Group:          System/Kernel
URL:            http://scoutfs.org/

%if 0%{?el7}
BuildRequires:  %{kernel_module_package_buildreqs}
%else
BuildRequires:  elfutils-libelf-devel
%endif
BuildRequires:  kernel-devel-uname-r = %{kernel_version}
BuildRequires:  git
BuildRequires:  module-init-tools

ExclusiveArch:  x86_64

Source:		%{kmod_name}-kmod-%{kmod_version}.tar

%if 0%{?el7}
# Build only for standard kernel variant(s); for debug packages, append "debug"
# after "default" (separated by space)
%kernel_module_package default
%endif

%global install_mod_dir extra/%{kmod_name}

%if ! 0%{?el7}
%global flavors_to_build x86_64
%endif

# el9 sanity: make sure we lock to the minor release we built for and block upgrades
%{lua:
  if string.match(rpm.expand("%{dist}"), "%.el9") then
    rpm.define("el9 1")
  end
}

%if 0%{?el9}
%define release_major_minor 9.%{lua: print(rpm.expand("%{dist}"):match("%.el9_(%d)"))}
Requires: system-release = %{release_major_minor}
%endif

%description
%{kmod_name} - kernel module


%prep
%setup -q -n %{kmod_name}-kmod-%{kmod_version}

set -- *
mkdir source
mv "$@" source/
mkdir obj


%build
echo "Building for kernel: %{kernel_version} flavors: '%{flavors_to_build}'"
for flavor in %flavors_to_build; do
    rm -rf obj/$flavor
    cp -r source obj/$flavor
    make RPM_GITHASH=%{kmod_git_hash} SCOUTFS_GIT_DESCRIBE=%{kmod_git_describe} SK_KSRC=%{kernel_source $flavor} -C obj/$flavor module
done

%install
export INSTALL_MOD_PATH=$RPM_BUILD_ROOT
export INSTALL_MOD_DIR=%{install_mod_dir}
mkdir -p %{install_mod_dir}
for flavor in %{flavors_to_build}; do
	export KSRC=%{kernel_source $flavor}
	export KVERSION=%{kversion}
	install -d $INSTALL_MOD_PATH/lib/modules/$KVERSION/%{install_mod_dir}
	cp $PWD/obj/$flavor/src/scoutfs.ko $INSTALL_MOD_PATH/lib/modules/$KVERSION/%{install_mod_dir}/
done

# mark modules executable so that strip-to-file can strip them
find %{buildroot} -type f -name \*.ko -exec %{__chmod} u+x \{\} \;

%if ! 0%{?el7}
%files
/lib/modules

%post
echo /lib/modules/%{kversion}/%{install_mod_dir}/scoutfs.ko | weak-modules --add-modules --no-initramfs
depmod -a
%endif

%clean
rm -rf %{buildroot}

%preun
# stash our modules for postun cleanup
SCOUTFS_RPM_NAME=$(rpm -q %{name} | grep "%{version}-%{release}")
rpm -ql $SCOUTFS_RPM_NAME | grep '\.ko$' > /var/run/%{name}-modules-%{version}-%{release} || true

%postun
cat /var/run/%{name}-modules-%{version}-%{release} | weak-modules --remove-modules --no-initramfs
rm /var/run/%{name}-modules-%{version}-%{release} || true