WIP: feat(linux-firmware): initial packaging of linux firmware

pkgs/linux-firmware/post-install.sh

@@ -0,0 +1,59 @@
+set -ex -uo pipefail
+
+_pick() {
+  local p="$1" f d; shift
+  for f; do
+    d="$out/$p/${f#$out/}"
+    mkdir -p "$(dirname "$d")"
+    mv $out/"$f" "$d"
+    rm -rf $out/"$f"
+  done
+}
+
+_package() {
+  local p="$1"
+  mkdir -p $out/$p/usr/lib/extension-release.d
+  cat << EOF > $out/$p/usr/lib/extension-release.d/extension-release.$p
+ID=patos
+IMAGE_ID=$p
+IMAGE_VERSION=$version
+VERSION_ID=patos
+EOF
+
+  mkfs.erofs --all-root -Efragments,dedupe,ztailpacking $out/$p.raw $out/$p
+  veritysetup format --root-hash-file $out/$p.roothash $out/$p.raw $out/$p.verity
+}
+
+# remove arm64 firmware https://bugs.archlinux.org/task/76583
+rm $out/usr/lib/firmware/mrvl/prestera/mvsw_prestera_fw_arm64-v4.1.img.zst
+
+_pick amd-ucode usr/lib/firmware/amd-ucode
+_package amd-ucode
+
+_pick linux-firmware-nfp usr/lib/firmware/netronome
+_package linux-firmware-nfp
+
+_pick linux-firmware-mellanox usr/lib/firmware/mellanox
+_package linux-firmware-mellanox
+
+_pick linux-firmware-marvell usr/lib/firmware/{libertas,mwl8k,mwlwifi,mrvl}
+_package linux-firmware-marvell
+
+_pick linux-firmware-qcom usr/lib/firmware/qcom
+_package linux-firmware-qcom
+
+_pick linux-firmware-liquidio usr/lib/firmware/liquidio
+_package linux-firmware-liquidio
+
+# _pick linux-firmware-qlogic usr/lib/firmware/{qlogic,qed,ql2???_*,c{b,t,t2}fw-*}
+# _package linux-firmware-qlogic
+
+# _pick linux-firmware-bnx2x usr/lib/firmware/bnx2x*
+# _package linux-firmware-bnx2x
+
+# and the rest is base firmware
+_pick linux-firmware usr/lib/firmware
+_package linux-firmware
+
+# clean up
+# rm -rf $out/usr