47 lines
1.5 KiB
Fish
Executable File
47 lines
1.5 KiB
Fish
Executable File
#!/bin/fish
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# get id and type of last snapshot
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set -l config "root"
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set -l snapshot (snapper -c $config --jsonout ls | jq -c ".$config | last")
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set -l id (echo $snapshot | jq ".number")
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if not contains (echo $snapshot | jq -r ".type") "pre" "post"
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echo "==> last snapshot type is neither 'pre' nor 'post'; no UKI creation"
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exit
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end
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# check if UKI already exists
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set -l ukis (ls /boot/EFI/Linux/ | grep "snap-pac-uki-[1-9][0-9]*\.efi" | grep -o '[1-9][0-9]*')
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if contains $id $ukis
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echo "==> UKI already exists; no UKI creation"
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exit
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end
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# prepare uki creation
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set -l buildpath "/tmp/snap-pac-uki/$id"
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mkdir -p $buildpath
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rm -rf "$buildpath/*"
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cd $buildpath
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sed "s/BUILD_ID=.*/BUILD_ID=\"Snapshot $id\"/" </usr/lib/os-release >./os-release
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grep options /boot/loader/entries/00-arch.conf | \
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string sub -s 9 | \
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sed ':a;N;$!ba;s/\n/ /g' | \
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sed "s/subvol=@/subvol=@snapshots\\/$id\\/snapshot/" >./kernel-parameters
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# create uki
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set -l ukipath "/boot/EFI/Linux/snap-pac-uki-$id.efi"
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objcopy \
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--add-section .osrel="./os-release" --change-section-vma .osrel=0x20000 \
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--add-section .cmdline="./kernel-parameters" --change-section-vma .cmdline=0x30000 \
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--add-section .splash="/usr/share/systemd/bootctl/splash-arch.bmp" --change-section-vma .splash=0x40000 \
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--add-section .linux="/boot/vmlinuz-linux" --change-section-vma .linux=0x2000000 \
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--add-section .initrd="/boot/initramfs-linux.img" --change-section-vma .initrd=0x3000000 \
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"/usr/lib/systemd/boot/efi/linuxx64.efi.stub" $ukipath
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echo "==> created UKI: $ukipath"
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