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nix/hosts/common/configs/system/impermanence/scripts/start.sh
2025-05-30 00:13:21 +01:00

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# shellcheck shell=bash
# shellcheck disable=SC2154
echo "Starting impermanence mount with source: $source, target: $target, path: $path, create: $create"
source_current="$source"
target_current="$target"
IFS='/' read -ra parts <<< "$path"
leaf="${parts[-1]}"
for part in "${parts[@]}"; do
source_current+="/$part"
target_current+="/$part"
if [[ -e "$source_current" ]]; then
read -r mode owner group <<< "$(stat -c '%a %u %g' "$source_current")"
if [[ -d "$source_current" ]]; then
install -d -m "$mode" -o "$owner" -g "$group" "$target_current"
continue
fi
if [[ "$part" != "$leaf" ]]; then
echo "Error: $source_current is not a directory, persistence for $path can not be applied."
exit 1
fi
install -m "$mode" -o "$owner" -g "$group" /dev/null "$target_current"
fi
if [[ "$create" == "none" ]]; then
break
fi
if [[ -e "$target_current" ]]; then
template="$target_current"
else
template="${source_current%/*}"
fi
read -r mode owner group <<< "$(stat -c '%a %u %g' "$template")"
if [[ "$part" == "$leaf" && "$create" == "file" ]]; then
install -m "$mode" -o "$owner" -g "$group" /dev/null "$source_current"
else
install -d -m "$mode" -o "$owner" -g "$group" "$source_current"
fi
done