#!/usr/bin/env bash
# Run on the provisioning HOST (root) to install PiShrink and dependencies.
# Enables shrinking backups in flash-emmc-on-connect.sh when SHRINK_BACKUP=1.
# PiShrink: https://github.com/Drewsif/PiShrink

set -e
PISHRINK_URL="${PISHRINK_URL:-https://raw.githubusercontent.com/Drewsif/PiShrink/master/pishrink.sh}"

echo "Installing PiShrink dependencies..."
apt-get update
apt-get install -y wget parted gzip pigz xz-utils udev e2fsprogs

echo "Downloading PiShrink..."
wget -q -O /usr/local/bin/pishrink.sh "$PISHRINK_URL"
chmod +x /usr/local/bin/pishrink.sh

echo "PiShrink installed at /usr/local/bin/pishrink.sh"
echo "To shrink backups automatically, add to /opt/cm4-provisioning/env:"
echo "  SHRINK_BACKUP=1"
echo "  # optional: PISHRINK_COMPRESS=gz   or   PISHRINK_COMPRESS=xz"