podman-build: Mount /mnt/gentoo as a volume

Using a bind-mount instead of an overlay should marginally increase
performance.

.gitignore

@@ -1,3 +1,5 @@
 /images
 /linux
 /output
+/.prepared
+/.host-tools

Makefile

@@ -0,0 +1,95 @@
+update.tar: output/update.tar.zstd
+
+.prepared: \
+		prepare.sh \
+		config-portage.sh \
+		setup-local-repo.sh \
+		$(shell find portage host-portage -type f) \
+		$(shell find patches/ebuilds -type f)
+	./prepare.sh
+	./config-portage.sh
+	./setup-local-repo.sh
+	touch .prepared
+
+prepare: .prepared
+
+.host-tools: \
+		build-host-tools.sh \
+		.prepared
+	./build-host-tools.sh
+	touch .host-tools
+
+host-tools: .host-tools
+
+images/rootfs.squashfs: \
+		build.sh \
+		build-rootfs.sh \
+		build-squashfs.sh \
+		linux/arch/arm64/boot/Image.gz \
+		.host-tools \
+		.prepared
+	./build.sh
+	./build-rootfs.sh
+	./build-squashfs.sh
+
+squashfs: images/rootfs.squashfs
+
+linux/arch/arm64/boot/Image.gz: \
+		build-kernel.sh \
+		linux.config \
+		.host-tools \
+		.prepared
+	./build-kernel.sh
+
+kernel: linux/arch/arm64/boot/Image.gz
+
+output/efi-part/EFI/BOOT/BOOTAA64.efi: \
+		build-grub.sh \
+		grub.cfg \
+		.host-tools \
+		.prepared
+	./build-grub.sh
+
+grub: output/efi-part/EFI/BOOT/BOOTAA64.efi
+
+output/efi-part/u-boot.bin: \
+		build-uboot.sh \
+		u-boot.config
+	./build-uboot.sh
+
+uboot: output/efi-part/u-boot.bin
+
+images/sdcard.img: \
+		genimage.cfg \
+		genimage.sh \
+		post-build.sh \
+		output/efi-part/u-boot.bin \
+		output/efi-part/EFI/BOOT/BOOTAA64.efi
+	./post-build.sh
+	./genimage.sh
+
+sdcard.img: images/sdcard.img
+
+images/firmware.img: images/sdcard.img
+
+output/update.tar.zstd: \
+		images/rootfs.squashfs \
+		images/firmware.img \
+		.host-tools \
+		.prepared
+	./build-update.sh
+
+clean:
+	git -C u-boot clean -fdx && git -C u-boot checkout -- .
+	rm -rf linux output images tmp
+	rm -f .prepared .host-tools
+
+.PHONY: \
+	grub \
+	host-tools \
+	kernel \
+	prepare \
+	sdcard.img \
+	squashfs \
+	uboot \
+	update.tar

build-kernel.sh

@@ -15,11 +15,11 @@ cd linux
     ../linux.config
 make -C /usr/src/linux O=${PWD} olddefconfig
 make -j$(nproc)
-kver=$(make kernelversion)
+kver=$(make -s kernelversion)
 make modules_install INSTALL_MOD_PATH=/mnt/gentoo
 cd -
 
-printf 'Installing Kernel ...\n'
+printf 'Installing Kernel %s ...\n' "${kver}"
 mkdir -p /mnt/gentoo/boot
 cp -au linux/arch/arm64/boot/Image.gz /mnt/gentoo/boot/vmlinuz-${kver}
 cp -au linux/.config /mnt/gentoo/boot/config-${kver}

build-rootfs.sh

@@ -5,10 +5,16 @@ set -e
 
 . ./config
 
-mkdir -p /mnt/gentoo/usr/bin
+mkdir -p \
+    /mnt/gentoo/usr/bin \
+    /mnt/gentoo/usr/lib \
+    /mnt/gentoo/usr/lib64 \
+    || exit
 [ -h /mnt/gentoo/bin ] || ln -s usr/bin /mnt/gentoo/bin
 [ -h /mnt/gentoo/sbin ] || ln -s usr/sbin /mnt/gentoo/sbin
 [ -h /mnt/gentoo/usr/sbin ] || ln -s bin /mnt/gentoo/usr/sbin
+[ -h /mnt/gentoo/lib ] || ln -s usr/lib /mnt/gentoo/lib
+[ -h /mnt/gentoo/lib64 ] || ln -s usr/lib64 /mnt/gentoo/lib64
 
 mkdir -p /mnt/gentoo/etc/portage
 ln -snf \
@@ -59,7 +65,10 @@ if [ -f /mnt/gentoo/etc/udev/hwdb.bin ]; then
     mv /mnt/gentoo/etc/udev/hwdb.bin /mnt/gentoo/usr/lib/udev/
 fi
 
+rm -f /mnt/gentoo/lib/tmpfiles.d/provision.conf
+
 systemctl preset-all --root=/mnt/gentoo
+rm -f /mnt/gentoo/lib/systemd/system/sysinit.target.wants/ldconfig.service
 
 systemd-sysusers --root=/mnt/gentoo
 if grep -q '^root:.*/bin/bash$' /mnt/gentoo/etc/passwd; then

build-uboot.sh

@@ -5,14 +5,8 @@ set -e
 
 . ./config
 
+./patch-uboot.sh
 cd u-boot
-if [ ! -f .patched ]; then
-    for x in ../patches/uboot/*.patch; do
-        printf 'Applying patch %s ...\n' "${x##*/}"
-        patch -p1 < "${x}"
-    done
-    : > .patched
-fi
 cat configs/rpi_4_defconfig ../u-boot.config > configs/yellow_defconfig
 make yellow_defconfig
 CROSS_COMPILE=${target}- make

patch-uboot.sh

@@ -0,0 +1,17 @@
+#!/bin/sh
+# vim: set sw=4 ts=4 sts=4 et :
+
+if [ -f u-boot/.patched ]; then
+    exit 0
+fi
+
+rc=0
+cd u-boot || exit
+for x in ../patches/uboot/*.patch; do
+    [ -f "${x}" ] || continue
+    printf 'Applying patch %s ...\n' "${x##*/}"
+    patch -p1 < "${x}" || rc=$?
+done
+if [ $rc -eq 0 ]; then
+    : > .patched
+fi

podman-build.sh

@@ -12,6 +12,7 @@ cid=$(podman run \
     -v packages:/var/cache/binpkgs \
     -v distfiles:/var/cache/distfiles \
     -v packages:/usr/${target}/var/cache/binpkgs \
+    -v /mnt/gentoo \
     -v ${PWD}:/tmp/build:rw,z \
     -w /tmp/build \
     -d \
@@ -20,7 +21,9 @@ cid=$(podman run \
     python -c 'from signal import *;signal(SIGTERM, lambda x, y: None);pause()'
 )
 
-podman exec -it ${cid} ./build-all.sh "${target}"
+./patch-uboot.sh
+
+podman exec -it ${cid} make
 
 podman stop ${cid}
 podman rm ${cid}