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Merge pull request #119657 from syncom/syncom/deterministic-efiimg

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Sandro 2021-06-26 21:50:20 +02:00 committed by GitHub
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1 changed files with 12 additions and 2 deletions
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14
nixos/modules/installer/cd-dvd/iso-image.nix
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@ -428,7 +428,8 @@ let
# Rewrite dates for everything in the FS
find . -exec touch --date=2000-01-01 {} +
usage_size=$(du -sb --apparent-size . | tr -cd '[:digit:]')
# Round up to the nearest multiple of 1MB, for more deterministic du output
usage_size=$(( $(du -s --block-size=1M --apparent-size . | tr -cd '[:digit:]') * 1024 * 1024 ))
# Make the image 110% as big as the files need to make up for FAT overhead
image_size=$(( ($usage_size * 110) / 100 ))
# Make the image fit blocks of 1M
@ -438,7 +439,16 @@ let
echo "Image size: $image_size"
truncate --size=$image_size "$out"
faketime "2000-01-01 00:00:00" mkfs.vfat -i 12345678 -n EFIBOOT "$out"
mcopy -psvm -i "$out" ./EFI ./boot ::
# Force a fixed order in mcopy for better determinism, and avoid file globbing
for d in $(find EFI boot -type d | sort); do
faketime "2000-01-01 00:00:00" mmd -i "$out" "::/$d"
done
for f in $(find EFI boot -type f | sort); do
mcopy -pvm -i "$out" "$f" "::/$f"
done
# Verify the FAT partition.
fsck.vfat -vn "$out"
''; # */