#!/usr/bin/env sh

set -e

case $1 in
  "version")
    git describe --match 'v[0-9]*' --dirty='.m' --always --tags
    ;;
  "revision")
    echo "$(git rev-parse HEAD)$(if ! git diff --no-ext-diff --quiet --exit-code; then echo .m; fi)"
    ;;
  *)
    echo "usage: ./hack/git-meta <version|revision>"
    exit 1
    ;;
esac