#!/bin/bash
HOWMANY="-$1"
if [ -z $1 ]; then
  HOWMANY="-1"
fi

BRANCH=$(git branch --show-current)
if [[ ! "${BRANCH}" =~ "r9s" ]]; then
  echo "Not a lookahead branch."
  exit 1
fi

echo "Fetching from upstream"
git fetch https://gitlab.com/redhat/centos-stream/release-engineering/pungi-centos.git centos-9-stream
echo "Formatting patch and applying..."
git format-patch --stdout ${HOWMANY} FETCH_HEAD | sed -e 's|centos/|rocky/|' | git apply
echo "!! DIFF OF CHANGES !!"
git --no-pager diff HEAD

echo "You may now commit and push."