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Add support to configure IMAGE_SIZE (#89) 

* Add support to configure IMAGE_SIZE

Add support to define IMAGE_SIZE without changing the defaults; this is helpful for use with both larger (Alma) and smaller (Alpine) distros.

* Resolve review 

Put IMAGE_SIZE in quotes as requested
This commit is contained in:
Phil Jaenke 2023-11-22 17:25:29 -05:00 committed by GitHub
parent 4ed774fb6d
commit baf97d399a
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1 changed files with 8 additions and 3 deletions
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11
scripts/build-image
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@ -5,11 +5,16 @@ IMAGE="${1}"
set -ex
# Aim for a 4 GB card but with 5% unpartitioned as a margin
# Aim for a 4 GB image default but with 5% unpartitioned as a margin, and a minimum of 1 GB
# >>> (0.95 * 4000000000 // 512) * 512
# 3800000000.0
# 3800000000.0
IMAGE_SIZE=${IMAGE_SIZE:-3800000000}
if [ $IMAGE_SIZE -lt 1000000000 ]; then
echo "IMAGE_SIZE of 1GB or less unsupported!"
exit 1
fi
rm -f "${IMAGE}"
fallocate -v -l 3800000000 "${IMAGE}" # 3,800,000,000 bytes
fallocate -v -l "${IMAGE_SIZE}" "${IMAGE}" # 3,800,000,000 bytes
parted -s "${IMAGE}" mklabel msdos
parted -s "${IMAGE}" mkpart primary fat32 -- 4MiB 32MiB # 28 MiB (29,360,128 bytes)