drive-ops/bump-tag

#!/bin/bash

set -e

echo "Fetching any updates from server:"
git pull
echo ""

if [[ -f ./cosmos.conf ]]; then
  . ./cosmos.conf
fi
if [[ -z ${1} ]]; then
	deftag=$(basename "${PWD}")
else
	deftag="${1}"
fi
tagpfx=${tag:="${deftag}"}

last_tag=$(git tag -l "${tagpfx}-*" | sort | tail -1)
if [[ -n ${last_tag} ]]; then
  echo "Verifying last tag ${last_tag}:"
  (git tag -v "${last_tag}" | grep ^gpg:) || true
  # again to not mask exit status of git with grep
  git tag -v "${last_tag}" >/dev/null 2>&1
  echo ""

  echo "Differences between tag ${last_tag} and what you are about to sign:"
  this_branch=$(git rev-parse --abbrev-ref HEAD)
  env PAGER=cat git diff --color "${last_tag}..${this_branch}"

  iter=1
  ok=
  while test -z "$ok"; do
    this_tag=$(date "+${tagpfx}-%Y-%m-%d-v$(printf "%02d" ${iter})")
    iter=$(( iter + 1))
    case $( (
      echo "${this_tag}"
      echo "${last_tag}"
    ) | sort | tail -1) in
    "${last_tag}") ;;

    "${this_tag}")
      ok=yes
      ;;
    esac
  done

  if [ "${deftag}" != "${tagpfx}" ]; then
    echo -e "Using new tag \e[94m${this_tag}\e[0m according to pattern in cosmos.conf"
  else
    echo -e "Using new tag \e[94m${this_tag}\e[0m"
  fi

  echo -e "\e[1mONLY SIGN IF YOU APPROVE OF VERIFICATION AND DIFF ABOVE\e[0m"
else
  echo -e "\e[1mCOULD NOT FIND LAST TAG, ASSUMING NEW TAG\e[0m"
  iter=1
  this_tag=$(date "+${tagpfx}-%Y-%m-%d-v$(printf "%02d" ${iter})")
fi

# GITTAGEXTRA is for putting things like "-u 2117364A"
# shellcheck disable=SC2086
git tag ${GITTAGEXTRA} -s "${this_tag}" -m bump.

git push
git push --tags