loki/tools/image-tag

#!/usr/bin/env bash

set -o errexit
set -o nounset
set -o pipefail

WIP=$(git diff --quiet || echo '-WIP')
BRANCH=$(git rev-parse --abbrev-ref HEAD | sed 's#/#-#g')
# When 7 chars are not enough to be unique, git automatically uses more.
# We are forcing to 7 here, as we are doing for grafana/grafana as well.
SHA=$(git rev-parse --short=7 HEAD | head -c7)

# If this is a tag, use it,                      otherwise branch-hash
TAG=$(git describe --exact-match 2> /dev/null || echo "${BRANCH}-${SHA}")
echo ${TAG}${WIP}