Reorganize imports

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/configs/system/impermanence/scripts/start.sh

@@ -0,0 +1,19 @@
+echo "Starting impermanence mount with source: ${source}, target: ${target}, path: ${path}."
+
+source_current="${source}"
+target_current="${target}"
+
+IFS='/' read -ra path_parts <<< "${path}"
+unset "path_parts[-1]"
+
+for part in "${path_parts[@]}"; do
+  source_current="${source_current}/${part}"
+  target_current="${target_current}/${part}"
+
+  if [[ ! -d "${source_current}" ]]; then
+    break
+  fi
+
+  read -r mode owner group <<< "$(stat -c '%a %u %g' "${source_current}")"
+  install -d -m "${mode}" -o "${owner}" -g "${group}" "${target_current}"
+done

hosts/common/configs/system/impermanence/scripts/stop.sh

@@ -0,0 +1,38 @@
+echo "Stopping impermanence mount with source: ${source}, target: ${target}, path: ${path}."
+
+source_current="${source}"
+target_current="${target}"
+
+IFS='/' read -ra path_parts <<< "${path}"
+unset "path_parts[-1]"
+
+for part in "${path_parts[@]}"; do
+  source_current="${source_current}/${part}"
+  target_current="${target_current}/${part}"
+
+  if [[ ! -d "${target_current}" ]]; then
+    break
+  fi
+
+  if [[ -d "${source_current}" ]]; then
+    continue
+  fi
+
+  read -r mode owner group <<< "$(stat -c '%a %u %g' "${target_current}")"
+  install -d -m "${mode}" -o "${owner}" -g "${group}" "${source_current}"
+done
+
+source=$(realpath -m "${source}/${path}")
+target=$(realpath -m "${target}/${path}")
+
+if [[ ! -e "${target}" ]] || { [[ -d "${target}" ]] && [[ -z "$(ls -A "${target}")" ]]; } || { [[ -f "${target}" ]] && [[ ! -s "${target}" ]]; }; then
+  exit 0
+fi
+
+if [[ -e "${source}" ]]; then
+  >&2 echo "Error: Source ${source} already exists. Cannot move ${target} to ${source}."
+  exit 1
+fi
+
+echo "Moving target ${target} to source ${source}."
+mv "${target}" "${source}"

hosts/common/configs/system/impermanence/scripts/wipe.sh

@@ -0,0 +1,30 @@
+delete_subvolume_recursively() {
+  IFS=$'\n'
+  for i in $(btrfs subvolume list -o "$1" | cut -f 9- -d ' '); do
+    delete_subvolume_recursively "/mnt/btrfs/${i}"
+  done
+  btrfs subvolume delete "$1"
+}
+
+if [[ -z "$DEVICE" ]]; then
+  echo "Error: DEVICE variable is not set."
+  exit 1
+fi
+
+mkdir -p /mnt/btrfs
+mount "/dev/mapper/$DEVICE" /mnt/btrfs
+
+if [[ -e /mnt/btrfs/@ ]]; then
+  mkdir -p /mnt/btrfs/@.bak
+  timestamp=$(date --date="@$(stat -c %Y /mnt/btrfs/@)" "+%Y-%m-%d_%H:%M:%S")
+  mv /mnt/btrfs/@ "/mnt/btrfs/@.bak/${timestamp}"
+fi
+
+find /mnt/btrfs/@.bak/ -maxdepth 1 -mtime +14 | while IFS= read -r i; do
+  delete_subvolume_recursively "${i}"
+done
+
+btrfs subvolume create /mnt/btrfs/@
+
+umount /mnt/btrfs
+rmdir /mnt/btrfs