%define _disable_source_fetch 0
%define debug_package %{nil}
%define _build_id_links none

Name:           kernel-zen
Version:        7.1.9
Release:        1.zen1%{?dist}
Summary:        The Linux Kernel with Zen Patches (for Miri Linux)

License:        GPL-2.0-only
URL:            https://github.com/zen-kernel/zen-kernel
Source0:        https://github.com/zen-kernel/zen-kernel/archive/refs/tags/v7.1.9-zen1.tar.gz

BuildRequires:  gcc make bc bison flex openssl-devel elfutils-libelf-devel dwarves perl python3 tar xz findutils diffutils kmod hostname patch
Requires:       coreutils kmod bash

%description
The Linux kernel with Zen patches, optimized for desktop responsiveness and multimedia workloads, built for Miri Linux without systemd dependencies.

%package devel
Summary:        Development files for building modules for the Zen kernel
Requires:       gcc make bc bison flex openssl-devel elfutils-libelf-devel perl python3 findutils
%description devel
This package provides kernel headers and makefiles sufficient to build modules against the Zen kernel package.

%package headers
Summary:        Header files for the Linux kernel for use by C libraries
%description headers
Kernel-headers includes the C header files that specify the interface between the Linux kernel and userspace libraries and programs.

%prep
%setup -q -n zen-kernel-%{version}-zen1

# Prepare kernel config
make x86_64_defconfig

# Enable key options for Miri Linux (immutable root, containers, Wayland, sound, s6-rc devtmpfs)
scripts/config --enable CONFIG_OVERLAY_FS
scripts/config --enable CONFIG_BTRFS_FS
scripts/config --enable CONFIG_SQUASHFS
scripts/config --enable CONFIG_EROFS_FS
scripts/config --enable CONFIG_NAMESPACES
scripts/config --enable CONFIG_USER_NS
scripts/config --enable CONFIG_CGROUPS
scripts/config --enable CONFIG_MEMCG
scripts/config --enable CONFIG_BLK_CGROUP
scripts/config --enable CONFIG_SECCOMP
scripts/config --enable CONFIG_SECCOMP_FILTER
scripts/config --enable CONFIG_DEVTMPFS
scripts/config --enable CONFIG_DEVTMPFS_MOUNT
scripts/config --enable CONFIG_DRM
scripts/config --enable CONFIG_AGP
scripts/config --enable CONFIG_TMPFS_POSIX_ACL
scripts/config --enable CONFIG_TMPFS_XATTR
scripts/config --enable CONFIG_EFI_STUB
scripts/config --enable CONFIG_EFIVAR_FS

make olddefconfig

%build
make %{?_smp_mflags} bzImage modules

%install
rm -rf %{buildroot}

KVER=%{version}-zen1

# Create directories
mkdir -p %{buildroot}/boot
mkdir -p %{buildroot}/lib/modules/${KVER}

# Install kernel image
cp arch/x86/boot/bzImage %{buildroot}/boot/vmlinuz-${KVER}
chmod 755 %{buildroot}/boot/vmlinuz-${KVER}
cp System.map %{buildroot}/boot/System.map-${KVER}
cp .config %{buildroot}/boot/config-${KVER}

# Install modules
make %{?_smp_mflags} INSTALL_MOD_PATH=%{buildroot} modules_install

# Remove build and source symlinks for now or re-create for devel
rm -f %{buildroot}/lib/modules/${KVER}/build
rm -f %{buildroot}/lib/modules/${KVER}/source

# Install headers
make %{?_smp_mflags} INSTALL_HDR_PATH=%{buildroot}/usr headers_install

# Prepare devel package
mkdir -p %{buildroot}/usr/src/kernels/${KVER}
cp -a .config %{buildroot}/usr/src/kernels/${KVER}/.config
cp -a Module.symvers %{buildroot}/usr/src/kernels/${KVER}/Module.symvers 2>/dev/null || touch %{buildroot}/usr/src/kernels/${KVER}/Module.symvers
cp -a System.map %{buildroot}/usr/src/kernels/${KVER}/System.map
cp -a Makefile %{buildroot}/usr/src/kernels/${KVER}/Makefile
cp -a include %{buildroot}/usr/src/kernels/${KVER}/include
cp -a scripts %{buildroot}/usr/src/kernels/${KVER}/scripts
cp -a arch/x86/include %{buildroot}/usr/src/kernels/${KVER}/arch/x86/include 2>/dev/null || :
cp -a arch/x86/Makefile %{buildroot}/usr/src/kernels/${KVER}/arch/x86/Makefile 2>/dev/null || :

# Link /lib/modules/${KVER}/build to /usr/src/kernels/${KVER}
ln -s /usr/src/kernels/${KVER} %{buildroot}/lib/modules/${KVER}/build

# Clean unnecessary files in headers/devel
find %{buildroot}/usr/include -name '.install' -delete
find %{buildroot}/usr/include -name '..install.cmd' -delete

%post
/sbin/depmod -a %{version}-zen1 || :

%postun
/sbin/depmod -a %{version}-zen1 || :

%files
/boot/vmlinuz-%{version}-zen1
/boot/System.map-%{version}-zen1
/boot/config-%{version}-zen1
/lib/modules/%{version}-zen1/
%exclude /lib/modules/%{version}-zen1/build

%files devel
/usr/src/kernels/%{version}-zen1
/lib/modules/%{version}-zen1/build

%files headers
/usr/include/*

%changelog
* Sat Aug 23 2025 Miri Linux Team <dev@miri.linux> - 7.1.9-1.zen1
- Initial build of Linux 7.1.9-zen1 for Miri Linux without systemd