git-update

#!/bin/bash
# Update the kernel trees, firmware, portage config and the system.
# The same file runs on quark and axion; what differs is set under the case.

export PATH=/usr/lib/llvm/23/bin:$PATH

[[ $EUID == 0 ]] || { echo "git-update: run as root" >&2; exit 1; }

STAMP=$(date +%F-%T)
JOBS=$(nproc)
failed=()

fail() { failed+=("$1"); echo "!!! $1" >&2; }

# name:image:branch of each tree under /usr/src, in build order
KERNELS=(linux:tip:linus/master drm:drm:airlied/drm-next agd5f:agd5f:agd5f/drm-next)
PUSH_REMOTES=()
EMERGE_EXCLUDE=(--exclude yuzu)
WORLD_OPTS=(--keep-going --complete-graph y)
PUSH_PORTAGE=0
MESA=

case ${HOSTNAME%%.*} in
axion)
	KERNELS=(agd5f:agd5f:agd5f/drm-next linux:tip:linus/master)
	PUSH_REMOTES=(github gitlab freedesktop)
	EMERGE_EXCLUDE=(--exclude yuzu --exclude citron --exclude wine-proton)
	WORLD_OPTS=()
	PUSH_PORTAGE=1
	MESA=/home/fireburn/Mesa
	;;
esac

MESA_OLD_TAGS=(
	R300_DRIVER_0 before_upgrade_03_01_05 blended_fountain
	embedded-1-20030120 embedded-1-20030224 embedded-1-20030305
	embedded-1-20030324 embedded-1-20030417 embedded-1-20030502
	gliding_penguin jump_and_click kw-mesa-1 mesa-6_5-20060712
	mesa_20050504 mesa_20050526 mesa_20050610 mesa_20050715 mesa_20060201
	mesa_20060325 mesa_3_1 mesa_3_1_beta_3 mesa_3_2 mesa_3_2_1
	mesa_3_2_beta_1 mesa_3_3 mesa_3_4 mesa_3_4_1 mesa_3_4_2 mesa_3_5
	mesa_4_0 mesa_4_0_1 mesa_4_0_2 mesa_4_0_3 mesa_4_0_4 mesa_4_1
	mesa_5_0 mesa_5_0_1 mesa_6_3 mesa_6_3_1 mesa_6_3_1_1 mesa_6_3_2
	mesa_6_4 mesa_6_4_1 mesa_6_4_2 mesa_6_5 mesa_6_5_1 mesa_6_5_2
	mesa_texman_20060210 noisy_cube red_tinted_cube rotating_gears
	shimmering_gears start texman_0_1_20060325 texman_0_1_20060330
	texman_0_1_20060621 texman_0_1_20060705 texman_0_1_pre_ttm
	texmem_0_2_20060912 texmem_0_3_20060923 texmem_0_3_20060929
	the_perfect_frag trunk_20040329 unichrome-last-xinerama
	vtx-0-2-21112003-freeze vtx-0-2-24112003
)

# Commit whatever changed in a repo that is updated by hand, then push it.
syncRepo() {
	local dir=$1
	git -C "$dir" rev-parse --git-dir >/dev/null 2>&1 || { fail "$dir is not a git repo"; return; }
	cd "$dir" || return
	git pull --rebase --autostash || fail "$dir: pull"
	git add .
	git diff --cached --quiet || git commit -q -m "Git Update $STAMP"
	git push || fail "$dir: push"
}

updateKernel() {
	local dir=${1%%:*} img rest=${1#*:} branch rel d
	img=${rest%%:*}; branch=${rest#*:}

	cd /usr/src/$dir || { fail "$dir: no tree"; return; }
	# --empty=drop so local fixes that have landed upstream are dropped
	# rather than stopping the rebase on an empty commit
	if ! git rebase --empty=drop "$branch"; then
		git rebase --abort 2>/dev/null
		git cherry-pick --abort 2>/dev/null
		git am --abort 2>/dev/null
		# the reset discards local commits, so keep them reachable
		git branch -f "backup/git-update-$img" HEAD
		git reset --hard "$branch"
		echo "$dir: rebase failed, old head kept as backup/git-update-$img" >&2
	fi

	make LLVM=1 -j"$JOBS" || { fail "$dir: build failed, /boot not touched"; return; }
	make LLVM=1 -j"$JOBS" modules_install || { fail "$dir: modules_install"; return; }
	rel=$(make -s LLVM=1 kernelrelease)
	install -m 755 arch/x86/boot/bzImage /boot/bzImage-$img.efi.new &&
		mv -f /boot/bzImage-$img.efi.new /boot/bzImage-$img.efi ||
		{ fail "$dir: install to /boot"; return; }

	# only now that a new kernel is in place, drop the old module sets
	for d in /lib/modules/*-"$img"+; do
		[[ -d $d ]] || continue
		[[ ${d##*/} == "$rel" || ${d##*/} == $(uname -r) ]] && continue
		rm -rf "$d"
	done
}

pushAll() {
	local r
	for r in "$@"; do
		git remote | grep -qx "$r" || continue
		git push "$r" --all --force || fail "$PWD: push $r"
		git push "$r" --tags || fail "$PWD: push tags $r"
	done
}

rm -f /etc/portage/make.conf~

cp /usr/bin/git-update /usr/src/

cd /usr/src && git pull --rebase --autostash || fail "/usr/src: pull"

if git -C /lib/firmware rev-parse --git-dir >/dev/null 2>&1; then
	git -C /lib/firmware pull --rebase || fail "/lib/firmware: pull"
else
	fail "/lib/firmware is not a git repo"
fi

cd /usr/src/linux && git fetch --all --prune || fail "fetch"
((${#PUSH_REMOTES[@]})) && pushAll "${PUSH_REMOTES[@]}"

for k in "${KERNELS[@]}"; do
	updateKernel "$k"
done

for d in linux drm agd5f stable; do
	n=$d
	[[ $d == linux ]] && n=tip
	[[ -f /usr/src/$d/.config ]] && cp /usr/src/$d/.config /usr/src/dot_config_$n
done

syncRepo /usr/src
syncRepo /etc/portage

if [[ -d $MESA ]]; then
	cd "$MESA" || exit 1
	sudo -u fireburn git fetch --all --prune
	sudo -u fireburn git pull
	sudo -u fireburn git tag -d "${MESA_OLD_TAGS[@]}" >/dev/null 2>&1
	sudo -u fireburn git push github --all --force
	sudo -u fireburn git push github --tags
	sudo -u fireburn git push gitlab --all --force
	sudo -u fireburn git push gitlab --tags
fi

cd /usr/portage
git pull --rebase --autostash || fail "/usr/portage: pull"
emerge --sync --quiet || fail "emerge --sync"
if ((PUSH_PORTAGE)); then
	git push gitlab --all --force
	git push github --all --force
fi

emerge -vDuNt "${WORLD_OPTS[@]}" @world || fail "world update"
emerge -vDt "${WORLD_OPTS[@]}" @live-rebuild @preserved-rebuild "${EMERGE_EXCLUDE[@]}" ||
	fail "live-rebuild"
emerge --depclean -a
eclean-dist --destructive -q

if ((${#failed[@]})); then
	printf '\n%s\n' "git-update finished with problems:"
	printf '  %s\n' "${failed[@]}"
	exit 1
fi