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update flake lock, update btrfs wipe GLaDOS, replace SDDM with plasma launch on EDI and GLaDOS

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This commit is contained in:
Lillian Violet 2026-02-22 20:57:53 +01:00
parent c6d25885c1
commit 68a7950b5e
3 changed files with 61 additions and 32 deletions
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72
nixos/hosts/GLaDOS/configuration.nix
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@ -33,9 +33,8 @@
gparted
];
services.displayManager.sddm = {
services.displayManager.plasma-login-manager = {
enable = true;
wayland.enable = true;
};
services.displayManager.defaultSession = "plasma";
@ -76,32 +75,63 @@
# };
};
boot = {
# Nuke root AND home subvolumes on every boot
initrd.systemd.services.wipe-my-fs = {
requires = ["dev-mapper-nvme_crypted.device"];
after = ["dev-mapper-nvme_crypted.device"];
initrd.systemd.services.rollback = {
description = "Rollback BTRFS root subvolume to a pristine state";
unitConfig.DefaultDependencies = "no";
serviceConfig.Type = "oneshot";
wantedBy = ["initrd.target"];
after = ["systemd-cryptsetup@nvme_crypted.service"];
before = ["sysroot.mount"];
script = ''
echo "mounting btrfs volume to tmp..."
mkdir -p /btrfs_tmp
mount /dev/mapper/cryptroot /btrfs_tmp
mount /dev/mapper/nvme_crypted /btrfs_tmp
echo "mount successful!"
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 "$1"
}
if [[ -e /btrfs_tmp/root ]]; then
echo "copying root to backup..."
mkdir -p /btrfs_tmp/old_roots
timestamp=$(date --date="@$(stat -c %Y /btrfs_tmp/root)" "+%Y-%m-%-d_%H:%M:%S")
mv /btrfs_tmp/root "/btrfs_tmp/old_roots/$timestamp"
echo "copy complete!"
fi
# Nuke and recreate root
delete_subvolume_recursively /btrfs_tmp/root
btrfs subvolume create /btrfs_tmp/root
if [[ -e /btrfs_tmp/home ]]; then
echo "copying home to backup..."
mkdir -p /btrfs_tmp/old_homes
timestamp=$(date --date="@$(stat -c %Y /btrfs_tmp/home)" "+%Y-%m-%-d_%H:%M:%S")
mv /btrfs_tmp/home "/btrfs_tmp/old_homes/$timestamp"
"copy complete!"
fi
# Nuke and recreate home (wipes /home — but we restore via impermanence)
delete_subvolume_recursively /btrfs_tmp/home
btrfs subvolume create /btrfs_tmp/home
umount /btrfs_tmp
delete_subvolume_recursively() {
IFS=$'\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"
}
echo "recursively deleting root subvolumes older than five days..."
for i in $(find /btrfs_tmp/old_roots/ -maxdepth 1 -mtime +5); do
delete_subvolume_recursively "$i"
done
echo "subvolumes deleted!"
echo "recursively deleting home subvolumes older than five days..."
for i in $(find /btrfs_tmp/old_homes/ -maxdepth 1 -mtime +5); do
delete_subvolume_recursively "$i"
done
echo "subvolumes deleted!"
echo "creating new root and home subvolumes..."
btrfs subvolume create /btrfs_tmp/root
btrfs subvolume create /btrfs_tmp/home
echo "unmounting btrfs temporary mount..."
umount /btrfs_tmp
echo "disk clear complete!"
'';
};