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Change img size calculation method

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This commit is contained in:
Aleksey Samoilov 2022-07-29 17:03:07 +04:00
parent 41ba6b4c2f
commit afcda1c828
1 changed files with 8 additions and 13 deletions
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21
build-rpi.sh
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@ -12,9 +12,6 @@ update-binfmts --enable
rootdir=$(pwd)
basedir=$(pwd)/artifacts/ubuntusway-rpi
# Free space on rootfs in MiB
free_space="500"
export packages="ubuntusway-minimal ubuntusway-desktop ubuntusway-standard"
export architecture="arm64"
export codename="jammy"
@ -198,22 +195,20 @@ EOF
chmod +x ubuntusway-$architecture/enable_zswap
LANG=C chroot ubuntusway-$architecture /enable_zswap
# Calculate the space to create the image.
root_size="$(du -s -B1K ubuntusway-$architecture | cut -f1)"
raw_size="$(($((free_space*1024))+root_size))"
# Calculate image size accounting for boot parition + 5%
boot_size="256"
root_size="$(du -cs --block-size=MB ubuntusway-$architecture | tail -n1 | cut -d'M' -f1)"
pad_size="$(( (root_size / 10) / 2 ))"
raw_size="$((boot_size + root_size + pad_size))"
# Create the disk and partition it
echo "Creating image file"
# Sometimes fallocate fails if the filesystem or location doesn't support it, fallback to slower dd in this case
if ! fallocate -l "$(echo ${raw_size}Ki | numfmt --from=iec-i --to=si --format=%.1f)" "${basedir}/${imagename}.img"
then
dd if=/dev/zero of="${basedir}/${imagename}.img" bs=1024 count=${raw_size}
fi
fallocate -l "${raw_size}"M "${basedir}/${imagename}.img"
parted "${imagename}.img" -s -- mklabel msdos
parted "${imagename}.img" -s -a optimal -- mkpart primary fat32 1 256
parted "${imagename}.img" -s -a optimal -- mkpart primary ext4 256 100%
parted "${imagename}.img" -s -a optimal -- mkpart primary fat32 1 "${boot_size}MB"
parted "${imagename}.img" -s -a optimal -- mkpart primary ext4 "${boot_size}MB" 100%
parted "${imagename}.img" -s set 1 boot on
# Set the partition variables