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# SPDX-License-Identifier: MIT
# SPDX-FileCopyrightText: 2021-2022 Alyssa Ross <hi@alyssa.is>
{ pkgs ? import <nixpkgs> {} }: pkgs.pkgsStatic.callPackage (
{ lib, stdenv, runCommand, writeReferencesToFile, s6-rc, tar2ext4
, busybox, cloud-hypervisor, cryptsetup, execline, jq, mdevd, s6
, s6-linux-utils, s6-portable-utils, socat, util-linuxMinimal, xorg
}:
let
inherit (lib) cleanSource cleanSourceWith concatMapStringsSep;
start-vm = import ../start-vm { pkgs = pkgs.pkgsStatic; };
pkgsGui = pkgs.pkgsMusl.extend (final: super: {
systemd = final.libudev-zero;
});
foot = pkgsGui.foot.override { allowPgo = false; };
packages = [
cloud-hypervisor execline jq mdevd s6 s6-linux-utils
s6-portable-utils s6-rc socat start-vm
(cryptsetup.override {
programs = {
cryptsetup = false;
cryptsetup-reencrypt = false;
integritysetup = false;
};
})
(busybox.override {
extraConfig = ''
CONFIG_FINDFS n
CONFIG_INIT n
'';
})
] ++ (with pkgsGui; [ foot westonLite ]);
kernel = pkgs.linux_latest.override {
structuredExtraConfig = with lib.kernel; {
VIRTIO = yes;
VIRTIO_PCI = yes;
VIRTIO_BLK = yes;
EXT4_FS = yes;
MODPROBE_PATH = freeform "/sbin/modprobe";
};
};
packagesSysroot = runCommand "packages-sysroot" {
nativeBuildInputs = [ xorg.lndir ];
} ''
mkdir -p $out/usr/bin
ln -s ${concatMapStringsSep " " (p: "${p}/bin/*") packages} $out/usr/bin
for pkg in ${lib.escapeShellArgs [ pkgsGui.mesa.drivers pkgsGui.dejavu_fonts ]}; do
lndir -silent "$pkg" "$out/usr"
done
ln -s ${kernel}/lib $out/lib
# TODO: this is a hack and we should just build the util-linux
# programs we want.
# https://lore.kernel.org/util-linux/87zgrl6ufb.fsf@alyssa.is/
ln -s ${util-linuxMinimal}/bin/{findfs,lsblk} $out/usr/bin
'';
packagesTar = runCommand "packages.tar" {} ''
cd ${packagesSysroot}
tar -cf $out --sort=name --mtime=@0 --verbatim-files-from \
-T ${writeReferencesToFile packagesSysroot} .
'';
in
stdenv.mkDerivation {
name = "spectrum-rootfs";
src = cleanSourceWith {
filter = name: _type: name != "${toString ./.}/build";
src = cleanSource ./.;
};
nativeBuildInputs = [ s6-rc tar2ext4 ];
MODULES_ALIAS = "${kernel}/lib/modules/${kernel.modDirVersion}/modules.alias";
MODULES_ORDER = "${kernel}/lib/modules/${kernel.modDirVersion}/modules.order";
PACKAGES_TAR = packagesTar;
postPatch = ''
mkdir $NIX_BUILD_TOP/empty
substituteInPlace Makefile --replace /var/empty $NIX_BUILD_TOP/empty
'';
installPhase = ''
cp build/rootfs.ext4 $out
'';
enableParallelBuilding = true;
passthru = { inherit kernel; };
meta = with lib; {
license = licenses.eupl12;
platforms = platforms.linux;
};
}
) {}
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