#!/bin/sh
set -eu

DATE="$1"
VERSION="v$2"

if git show "$VERSION" 1>/dev/null 2>/dev/null; then
  echo 'Version "$VERSION" already exists.'
  exit 1
fi

if [ '$DATE' != "$(git log -1 --format=%cd --date=short HEAD)" ]; then
  echo 'Date "$DATE" is not up-to-date.'
  exit 1
fi

git tag "$VERSION"