added stuff

nyx/homes/notashelf/programs/terminal/shell/bin/fs-diff/fs-diff.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+OLD_TRANSID=$(sudo btrfs subvolume find-new /mnt/root-blank 9999999)
+OLD_TRANSID=${OLD_TRANSID#transid marker was }
+
+sudo btrfs subvolume find-new "/mnt/root" "$OLD_TRANSID" |
+  sed '$d' |
+  cut -f17- -d' ' |
+  sort |
+  uniq |
+  while read -r path; do
+    path="/$path"
+    if [ -L "$path" ]; then
+      : # The path is a symbolic link, so is probably handled by NixOS already
+    elif [ -d "$path" ]; then
+      : # The path is a directory, ignore
+    else
+      echo "$path"
+    fi
+  done