akshara/akshara.hook

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#!/bin/bash
run_latehook() {
echo
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# Remove /new_root/.successful-update if exists
rm -f /new_root/.successful-update
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# Detect if update downloaded.
if [[ -d /new_root/.update_rootfs ]]; then
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# Available, rename old /usr and move new /usr to /.
mv /new_root/usr /new_root/.old.usr
mv /new_root/.update_rootfs/usr /new_root/usr
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# Same for /var/cache/pacman.
mv /new_root/var/cache/pacman /new_root/.old.pacmancache
mv /new_root/.update_rootfs/var/cache/pacman /new_root/var/cache
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# Same for /var/lib/pacman.
mv /new_root/var/lib/pacman /new_root/.old.var.lib.pacman
mv /new_root/.update_rootfs/var/lib/pacman /new_root/var/lib
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# Move to /etc stage.
touch /new_root/.etc-stage
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fi
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# Detect if /etc stage is active.
if [[ -f /new_root/.etc-stage ]]; then
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# Create new /etc.
rm -rf /new_root/.new_etc
cp -a /new_root/etc /new_root/.new_etc
(cd /new_root/etc && find . -type f -print0 | grep -Fxvz -f <(cd "/new_root/.update_rootfs/etc" && find . -type f) | xargs -0 rm -rf)
cp /new_root/.update_rootfs/etc/pacman.conf /new_root/.new_etc/pacman.conf
rm -rf /new_root/.new_etc/pacman.d
cp -a /new_root/.update_rootfs/etc/pacman.d /new_root/.new_etc/pacman.d
cp -an /new_root/.update_rootfs/etc/* /new_root/.new_etc
mv /new_root/etc /new_root/.old.etc || :
mv /new_root/.new_etc /new_root/etc
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mv /new_root/etc/systemd/system /new_root/.old.etc.systemd.system
mv /new_root/.update_rootfs/etc/systemd/system /new_root/etc/systemd
# Successful update.
rm -f /new_root/.etc-stage
mv /new_root/.update_rootfs /new_root/.old.update_rootfs
touch /new_root/.successful-update
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fi
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}