#!/bin/bash

INST_NAME="$1"
VERSION="$2"
if [ -z "$INST_NAME" ] || [ -z "$VERSION" ]; then
  echo "Usage: $0 <instance> <version>"
  exit 1
fi

set -eu

K8S_MANIFEST_D="/etc/kubernetes/manifests/"
K8S_MANIFEST_FILE="$K8S_MANIFEST_D/nextcloud-$INST_NAME.yml"
if [ ! -e "$K8S_MANIFEST_FILE" ]; then
  echo "could not find manifest file: $K8S_MANIFEST_FILE"
  exit 2
fi

TMP_D=$(mktemp -d -t nextcloud-upgrade.XXXXXXX)
function cleanup {
  rm -rf "$TMP_D"
}
trap cleanup EXIT

echo "*** Pre-Pulling the image"
echo ""
ctr -n k8s.io image pull "docker.io/library/nextcloud:$VERSION"
echo ""

echo "*** Patching manifest file"
echo ""
sed "s#image: \"nextcloud:.*\"#image: \"nextcloud:$VERSION\"#" "$K8S_MANIFEST_FILE" > "$TMP_D/upgraded.yml"
set +e
diff -u "$K8S_MANIFEST_FILE" "$TMP_D/upgraded.yml"
if [ $? -eq 0 ]; then
  echo "patching file failed?"
  exit 2
fi
cat "$TMP_D/upgraded.yml" > "$K8S_MANIFEST_FILE"
echo ""

exit 0