purge-btrfs-snapshots.sh

purge-btrfs-snapshots.sh

#!/usr/bin/env bash
set -euo pipefail

echo "🚨 Purging ALL Btrfs snapshots (root + home)"
echo "--------------------------------------------"

# Sanity check
if [[ "$(findmnt -n -o FSTYPE /)" != "btrfs" ]]; then
  echo "❌ Root filesystem is not Btrfs. Aborting."
  exit 1
fi

echo "✔ Btrfs detected"
echo

echo "🔍 Locating snapshot subvolumes..."

SNAPSHOTS=$(sudo btrfs subvolume list / | awk '{print $NF}' | grep -E '(^|/)\\.snapshots/.*/snapshot$' || true)

if [[ -z "$SNAPSHOTS" ]]; then
  echo "✅ No snapshot subvolumes found."
else
  echo "$SNAPSHOTS"
  echo
  echo "🧨 Deleting snapshot subvolumes..."

  while read -r sv; do
    echo "Deleting subvolume: /$sv"
    sudo btrfs subvolume delete "/$sv" || true
  done <<< "$SNAPSHOTS"
fi

echo
echo "🧹 Removing leftover snapshot directories..."
sudo rm -rf /.snapshots /home/.snapshots || true

echo
echo "🔄 Syncing filesystem..."
sudo btrfs filesystem sync /

echo
echo "📦 Rebalancing (reclaiming space)..."
sudo btrfs filesystem balance start -dusage=50 /

echo
echo "📊 Final disk usage:"
sudo btrfs filesystem usage /

echo
echo "✅ Snapshot purge COMPLETE."