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#!/bin/bash
set -euo pipefail
echo "--- Initializing Restic Backup Script ---"
# Source environment variables if the file exists
# This script expects RESTIC_ENV_FILE to be set in the environment
# The environment file includes rclone throttling settings to prevent timeouts
# shellcheck source=/dev/null
if [ -f "$RESTIC_ENV_FILE" ]; then
source "$RESTIC_ENV_FILE"
echo "Environment variables loaded from $RESTIC_ENV_FILE"
else
echo "Error: RESTIC_ENV_FILE not found. Please run setup.sh first." >&2
exit 1
fi
# Source common functions
# shellcheck source=/dev/null
source "$(dirname "$0")/common.sh"
# --- Pre-warm rclone connection ---
pre_warm_connection "Restic Backup"
# --- Exit Trap ---
# This will call notify with the script's final exit code upon termination.
trap 'notify "Restic Backup ($(whoami)@$(hostname))" "Restic backup script finished with exit code $?" $?' EXIT
# --- Main Backup Logic ---
echo "--- Starting Restic Backup at $(date) ---"
# Perform the Restic backup
echo "Starting Restic backup to repository: $RESTIC_REPOSITORY"
restic backup \
--repo "${RESTIC_REPOSITORY}" \
--files-from "${CONFIG_DIR}/paths" \
--exclude-file "${CONFIG_DIR}/excludes" \
--password-file "${RESTIC_PASSWORD_FILE}" \
--option rclone.timeout=20m \
--tag daily || {
echo "Error: Restic backup failed." >&2
notify "Restic Backup ($(whoami)@$(hostname))" "Backup phase failed!" 8
exit 1
}
# Prune old snapshots - only on specific hours to avoid conflicts
HOUR=$(date +%H)
# Only prune between 2-4 AM to reduce multi-device conflicts
if [ "$HOUR" -ge 2 ] && [ "$HOUR" -lt 4 ]; then
# Add random delay to stagger multiple devices
sleep "$(shuf -i 0-1800 -n 1)" # 0-30 minutes random delay
echo "Applying Restic retention policy and pruning old snapshots..."
restic forget \
--repo "${RESTIC_REPOSITORY}" \
--password-file "${RESTIC_PASSWORD_FILE}" \
--option rclone.timeout=20m \
--keep-daily 7 \
--keep-weekly 4 \
--keep-monthly 6 \
--keep-yearly 6 \
--prune || {
echo "Warning: Restic forget/prune failed (another device might be pruning)." >&2
notify "Restic Backup ($(whoami)@$(hostname))" "Prune phase failed!" 6
# Don't exit on prune failure - backup was successful
}
else
echo "Skipping prune - only running between 2-4 AM to avoid multi-device conflicts"
fi
echo "--- Restic Backup finished at $(date) ---"
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