31 lines
1.9 KiB
Bash
31 lines
1.9 KiB
Bash
#!/bin/sh
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set -eu
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export LC_ALL=C.UTF-8
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export SOURCE_DATE_EPOCH={{ SOURCE_DATE_EPOCH }}
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[ "$(id -u)" -eq 0 ]
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[ {{ MODE }} = "root" ]
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case {{ FORMAT }} in tar|squashfs|ext2|ext4) : ;; *) exit 1;; esac
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{{ CMD }} --mode={{ MODE }} --variant={{ VARIANT }} {{ DIST }} /tmp/mmdebstrap-{{ DIST }}-{{ VARIANT }}.{{ FORMAT }} {{ MIRROR }}
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# creating an ext4 image on a 9p filesystem produces different results compared
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# to creating it on a tmpfs or ext4 fs because 9p does not support discards and
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# even when running with -E nodiscard, the number of written bytes will differ
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# https://lore.kernel.org/linux-ext4/171484520952.2626447.2160419274451668597@localhost/T/#t
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mv /tmp/mmdebstrap-{{ DIST }}-{{ VARIANT }}.{{ FORMAT }} ./cache/mmdebstrap-{{ DIST }}-{{ VARIANT }}.{{ FORMAT }}
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if [ "{{ FORMAT }}" = tar ]; then
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printf 'ustar ' | cmp --bytes=6 --ignore-initial=257:0 ./cache/mmdebstrap-{{ DIST }}-{{ VARIANT }}.tar -
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elif [ "{{ FORMAT }}" = squashfs ]; then
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printf 'hsqs' | cmp --bytes=4 ./cache/mmdebstrap-{{ DIST }}-{{ VARIANT }}.squashfs -
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elif [ "{{ FORMAT }}" = ext2 ]; then
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printf '\123\357' | cmp --bytes=2 --ignore-initial=1080:0 ./cache/mmdebstrap-{{ DIST }}-{{ VARIANT }}.ext2 -
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printf '\000\000\000\000\000\000\000\000\000\000\000\000' | cmp --bytes=12 --ignore-initial=1116:0 ./cache/mmdebstrap-{{ DIST }}-{{ VARIANT }}.ext2 -
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elif [ "{{ FORMAT }}" = ext4 ]; then
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printf '\123\357' | cmp --bytes=2 --ignore-initial=1080:0 ./cache/mmdebstrap-{{ DIST }}-{{ VARIANT }}.ext4 -
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printf '\074\020\000\000\302\042\000\000\153\004\000\000' | cmp --bytes=12 --ignore-initial=1116:0 ./cache/mmdebstrap-{{ DIST }}-{{ VARIANT }}.ext4 -
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[ "$(/sbin/blkid --match-tag UUID --output value ./cache/mmdebstrap-{{ DIST }}-{{ VARIANT }}.ext4)" = "$(uuidgen --sha1 --namespace="$(uuidgen --sha1 --namespace='@dns' --name mister-muffin.de)" --name $SOURCE_DATE_EPOCH)" ]
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else
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echo "unknown format: {{ FORMAT }}" >&2
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exit 1
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fi
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