%{?!packager: %define packager Brian Behlendorf <behlendorf1@llnl.gov>}

%if ! 0%{?rhel}%{?fedora}%{?mageia}%{?suse_version}%{?openEuler}
%define not_rpm 1
%endif

# Exclude input files from mangling
%global __brp_mangle_shebangs_exclude_from ^/usr/src/.*$

%define module  zfs
%define mkconf  scripts/dkms.mkconf
# taken from https://github.com/openzfs/zfs/releases/tag/zfs-%{version}
%define kernel_min 3.10
%define kernel_max 6.7.999

Name:           %{module}-dkms
Version:        2.2.3
Release:        1%{?dist}
Summary:        Kernel module(s) (dkms)

Group:          System Environment/Kernel
License:        CDDL
URL:            https://github.com/openzfs/zfs
Source0:        https://github.com/openzfs/zfs/releases/download/zfs-%{version}/zfs-%{version}.tar.gz
BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
BuildArch:      noarch

Requires:       dkms >= 2.2.0.3
Requires(pre):  dkms >= 2.2.0.3
Requires(post): dkms >= 2.2.0.3
Requires(preun): dkms >= 2.2.0.3
Requires:       gcc, make, perl, diffutils
Requires(post): gcc, make, perl, diffutils
%if 0%{?rhel}%{?fedora}%{?mageia}%{?suse_version}%{?openEuler}
Requires:       kernel-devel >= %{kernel_min}, kernel-devel <= %{kernel_max}
Requires(post): kernel-devel >= %{kernel_min}, kernel-devel <= %{kernel_max}
Obsoletes:      spl-dkms <= %{version}
%endif
Provides:       %{module}-kmod = %{version}
AutoReqProv:    no

%if (0%{?fedora}%{?suse_version}%{?openEuler}) || (0%{?rhel} && 0%{?rhel} < 9)
# We don't directly use it, but if this isn't installed, rpmbuild as root can
# crash+corrupt rpmdb
# See issue #12071
BuildRequires:  ncompress
%endif

%description
This package contains the dkms ZFS kernel modules.

%prep
%setup -q -n %{module}-%{version}

%build
%{mkconf} -n %{module} -v %{version} -f dkms.conf

%install
if [ "$RPM_BUILD_ROOT" != "/" ]; then
    rm -rf $RPM_BUILD_ROOT
fi
mkdir -p $RPM_BUILD_ROOT/usr/src/
cp -rf ${RPM_BUILD_DIR}/%{module}-%{version} $RPM_BUILD_ROOT/usr/src/

%clean
if [ "$RPM_BUILD_ROOT" != "/" ]; then
    rm -rf $RPM_BUILD_ROOT
fi

%files
%defattr(-,root,root)
/usr/src/%{module}-%{version}

%pre
echo "Running pre installation script: $0. Parameters: $*"
# We don't want any other versions lingering around in dkms.
# Tests with 'dnf' showed that in case of reinstall, or upgrade
#  the preun scriptlet removed the version we are trying to install.
# Because of this, find all zfs dkms sources in /var/lib/dkms and
#  remove them, if we find a matching version in dkms.

dkms_root=/var/lib/dkms
if [ -d ${dkms_root}/%{module} ]; then
    cd ${dkms_root}/%{module}
    for x in [[:digit:]]*; do
        [ -d "$x" ] || continue
        otherver="$x"
        opath="${dkms_root}/%{module}/${otherver}"
        if [ "$otherver" != %{version} ]; then
            # This is a workaround for a broken 'dkms status', we caused in a previous version.
            # One day it might be not needed anymore, but it does not hurt to keep it.
            if dkms status -m %{module} -v "$otherver" 2>&1 | grep "${opath}/source/dkms.conf does not exist"
            then
                echo "ERROR: dkms status is broken!" >&2
                if [ -L "${opath}/source" -a ! -d "${opath}/source" ]
                then
                    echo "Trying to fix it by removing the symlink: ${opath}/source" >&2
                    echo "You should manually remove ${opath}" >&2
                    rm -f "${opath}/source" || echo "Removal failed!" >&2
                fi
            fi
            if [ `dkms status -m %{module} -v "$otherver" | grep -c %{module}` -gt 0 ]; then
                echo "Removing old %{module} dkms modules version $otherver from all kernels."
                dkms remove -m %{module} -v "$otherver" --all ||:
            fi
        fi
    done
    cd ${dkms_root}
fi

# Uninstall this version of zfs dkms modules before installation of the package.
if [ `dkms status -m %{module} -v %{version} | grep -c %{module}` -gt 0 ]; then
    echo "Removing %{module} dkms modules version %{version} from all kernels."
    dkms remove -m %{module} -v %{version} --all ||:
fi

%post
echo "Running post installation script: $0. Parameters: $*"
# Add the module to dkms, as reccommended in the dkms man page.
# This is generally rpm specfic.
# But this also may help, if we have a broken 'dkms status'.
# Because, if the sources are available and only the symlink pointing
#  to them is missing, this will resolve the situation
echo "Adding %{module} dkms modules version %{version} to dkms."
dkms add -m %{module} -v %{version} %{!?not_rpm:--rpm_safe_upgrade} ||:

# After installing the package, dkms install this zfs version for the current kernel.
# Force the overwriting of old modules to avoid diff warnings in dkms status.
# Or in case of a downgrade to overwrite newer versions.
# Or if some other backed up versions have been restored before.
echo "Installing %{module} dkms modules version %{version} for the current kernel."
dkms install --force -m %{module} -v %{version} ||:

%preun
dkms_root="/var/lib/dkms/%{module}/%{version}"
echo "Running pre uninstall script: $0. Parameters: $*"
# In case of upgrade we do nothing. See above comment in pre hook.
if [ "$1" = "1" -o "$1" = "upgrade" ] ; then
    echo "This is an upgrade. Skipping pre uninstall action."
    exit 0
fi

# Check if we uninstall the package. In that case remove the dkms modules.
# '0' is the value for the first parameter for rpm packages.
# 'remove' or 'purge' are the possible names for deb packages.
if [ "$1" = "0" -o "$1" = "remove" -o "$1" = "purge" ] ; then
    if [ `dkms status -m %{module} -v %{version} | grep -c %{module}` -gt 0 ]; then
        echo "Removing %{module} dkms modules version %{version} from all kernels."
        dkms remove -m %{module} -v %{version} --all %{!?not_rpm:--rpm_safe_upgrade} && exit 0
    fi
    # If removing the modules failed, it might be because of the broken 'dkms status'.
    if dkms status -m %{module} -v %{version} 2>&1 | grep "${dkms_root}/source/dkms.conf does not exist"
    then
        echo "ERROR: dkms status is broken!" >&2
        echo "You should manually remove ${dkms_root}" >&2
        echo "WARNING: installed modules in /lib/modules/`uname -r`/extra could not be removed automatically!" >&2
    fi
else
    echo "Script parameter $1 did not match any removal condition."
fi

exit 0