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chris
2026-07-03 20:14:10 +01:00
parent 1ad416c69e
commit 6bd0fa9d6e
3 changed files with 39 additions and 37 deletions
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hardware/filesystem.nix
+37 -37
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@@ -8,43 +8,43 @@ in
{
boot.initrd.supportedFilesystems = [ "btrfs" ];
boot.initrd.systemd.services.rollback-root = {
description = "Rollback btrfs root subvolume";
wantedBy = [ "initrd.target" ];
after = [ "systemd-cryptsetup@.service" ];
before = [ "sysroot.mount" ];
unitConfig.DefaultDependencies = "no";
serviceConfig.Type = "oneshot";
script = ''
mkdir -p /btrfs_tmp
mount ${rootDisk} /btrfs_tmp
# Ensure the old_roots directory exists
mkdir -p /btrfs_tmp/old_roots
if [[ -e /btrfs_tmp/root ]]; then
timestamp=$(date +%Y-%m-%d_%H-%M-%S)
mv /btrfs_tmp/root "/btrfs_tmp/old_roots/$timestamp"
fi
delete_subvolume_recursively() {
IFS=$'\n'
for i in $(btrfs subvolume list -o "$1" | cut -f 9 -d ' '); do
delete_subvolume_recursively "/btrfs_tmp/$i"
done
btrfs subvolume delete "$1"
}
for i in $(find /btrfs_tmp/old_roots/ -maxdepth 1 -mtime +7); do
# Don't delete the old_roots directory itself
if [[ "$i" == "/btrfs_tmp/old_roots/" ]]; then continue; fi
delete_subvolume_recursively "$i"
done
btrfs subvolume create /btrfs_tmp/root
umount /btrfs_tmp
'';
};
# boot.initrd.systemd.services.rollback-root = {
# description = "Rollback btrfs root subvolume";
# wantedBy = [ "initrd.target" ];
# after = [ "systemd-cryptsetup@.service" ];
# before = [ "sysroot.mount" ];
# unitConfig.DefaultDependencies = "no";
# serviceConfig.Type = "oneshot";
# script = ''
# mkdir -p /btrfs_tmp
# mount ${rootDisk} /btrfs_tmp
#
# # Ensure the old_roots directory exists
# mkdir -p /btrfs_tmp/old_roots
#
# if [[ -e /btrfs_tmp/root ]]; then
# timestamp=$(date +%Y-%m-%d_%H-%M-%S)
# mv /btrfs_tmp/root "/btrfs_tmp/old_roots/$timestamp"
# fi
#
# delete_subvolume_recursively() {
# IFS=$'\n'
# for i in $(btrfs subvolume list -o "$1" | cut -f 9 -d ' '); do
# delete_subvolume_recursively "/btrfs_tmp/$i"
# done
# btrfs subvolume delete "$1"
# }
#
# for i in $(find /btrfs_tmp/old_roots/ -maxdepth 1 -mtime +7); do
# # Don't delete the old_roots directory itself
# if [[ "$i" == "/btrfs_tmp/old_roots/" ]]; then continue; fi
# delete_subvolume_recursively "$i"
# done
#
# btrfs subvolume create /btrfs_tmp/root
# umount /btrfs_tmp
# '';
# };
# fileSystems."/" = {
# device = rootDisk;