Housekeeping

- Update README
- Run shellcheck on .sh files
- Add helper scripts
- Remove eirene vm variant
- Add post-install checklist

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

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

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