mkimage-profiles/features.in/syslinux/scripts.d/20-propagator-ramdisk-syslinux

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#!/bin/sh
# postprocess isolinux configuration
# when the image sizes are finally known
# NB: install2_size, live_size, rescue_size get defined here
cd "$WORKDIR"
[ -d "syslinux" ] || exit 0
# apply size census while looking for potential squashfs images
find -maxdepth 1 -type f -size +1M \
| sed 's,^\./,,' \
| while read image; do
size="$[ $(stat -c%s "$image") / 1024 + 1 ]"
sed -i "s,@${image}_size@,$size," syslinux/*.cfg
done