release script: handle multiple releases on the same day

# - pushes master & the new tag to GitHub

# - creates a new Release on GitHub

# - [automated] a GitHub Action will create a Homebrew PR for the new release

#

# TODO: handle making multiple releases on the same date

set -e

binfile="bin/ruby-build"

new_version="$(date '+%Y%m%d')"

version_suffix=""

while git show-ref --verify --quiet -- "refs/tags/v${new_version}${version_suffix}"; do

  version_suffix=".$(( ${version_suffix#.} + 1 ))"

done

new_version="${new_version}${version_suffix}"

version_tag="v${new_version}"

previous_tag="$(git describe --tags HEAD --abbrev=0)"