#!/bin/bash

set -eu -o pipefail

BRANCH=$(git branch --show-current)

if ! [[ "${BRANCH}" =~ ^[0-9]+\.[0-9]+$ ]]
then
  echo ERROR: This is not a release branch!
  exit 1
fi

# The tail is a necessary workaround to remove the warning from the output.
NEW_VERSION="$(bump-my-version show new_version --increment release | tail -n -1)"
echo "Release ${NEW_VERSION}"

if ! [[ "${NEW_VERSION}" == "${BRANCH}"* ]]
then
  echo ERROR: Version does not match release branch
  exit 1
fi

towncrier build --yes --version "${NEW_VERSION}"
bump-my-version bump release --commit --message "Release {new_version}" --tag --tag-name "{new_version}" --tag-message "Release {new_version}" --allow-dirty
bump-my-version bump patch --commit

# Git push is not atomic by default!
git push --atomic origin "${BRANCH}" "${NEW_VERSION}"