#!/usr/bin/env bash
# Puts the stack back on the previous tag (GK_PREVIOUS_TAG) and swaps the two,
# so running it again rolls forward. See docs/deploy.md.
set -euo pipefail
STACK="${GK_STACK_DIR:-/home/greg/homelab/gregkilmer}"
ENV_FILE="$STACK/.env"
cur="$(grep -E '^GK_TAG=' "$ENV_FILE" | cut -d= -f2-)"
prev="$(grep -E '^GK_PREVIOUS_TAG=' "$ENV_FILE" | cut -d= -f2-)"
[ -n "$prev" ] || { echo "No GK_PREVIOUS_TAG in $ENV_FILE"; exit 1; }
sed -i "s|^GK_TAG=.*|GK_TAG=$prev|; s|^GK_PREVIOUS_TAG=.*|GK_PREVIOUS_TAG=$cur|" "$ENV_FILE"
docker compose --project-directory "$STACK" -f "$STACK/compose.yaml" up -d --wait --wait-timeout 120
echo "Now running $prev (previous: $cur)"