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#!/bin/bash -e
package=0
process_preset() {
if [[ -n "${pkgbase}" && -e $preset ]]; then
if ! cmp $preset > /dev/null 2>&1 <(sed "s|%PKGBASE%|${pkgbase}|g" /usr/share/mkinitcpio/hook.preset); then
if [[ ! -e $preset.pacsave ]]; then
# save the preset as pacsave
mv $preset $preset.pacsave && return 0
fi
else
# remove the preset
rm $preset && return 0
fi
fi
}
while read -r line; do
if [[ $line != */vmlinuz ]]; then
# triggers when it's a change to usr/lib/initcpio/*
package=1
continue
fi
if ! read -r pkgbase > /dev/null 2>&1 < "${line%/vmlinuz}/pkgbase"; then
# if the kernel has no pkgbase, we skip it
continue
fi
# remove the actual kernel and images for the package being removed
kernel="/boot/vmlinuz-${pkgbase}"
preset="/etc/mkinitcpio.d/${pkgbase}.preset"
initramfs="/boot/initramfs-${pkgbase}.img"
fallback_initramfs="/boot/initramfs-${pkgbase}-fallback.img"
if [[ -e $kernel ]]; then
# remove the installed kernel
rm $kernel
fi
process_preset "${pkgbase}" $preset
if [[ -e $initramfs ]]; then
# remove the main image
rm $initramfs
fi
if [[ -e $fallback_initramfs ]]; then
# remove the fallback image
rm $fallback_initramfs
fi
done
if (( package )) && compgen -G /etc/mkinitcpio.d/"*.preset" > /dev/null; then
shopt -s nullglob
for preset in /etc/mkinitcpio.d/*.preset; do
pkgbase=${preset##*/}
pkgbase=${pkgbase%.preset}
process_preset "${pkgbase}" $preset
done
shopt -u nullglob
fi
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