#!/bin/sh
set -eu

description=$(git describe --tags --long --match 'v[0-9]*' --dirty)
case "$description" in
  *-dirty) echo 'Refusing to package a dirty tree' >&2; exit 1 ;;
esac
version=${description#v}
base=${version%%-[0-9]*}
app_version=$(sed -n 's/^appVersion:[[:space:]]*//p' Chart.yaml | tr -d '"')
test -n "$app_version" || { echo 'Chart.yaml appVersion is missing' >&2; exit 1; }
test "$base" = "$app_version" || {
  echo "Git release $base does not match Chart.yaml appVersion $app_version" >&2
  exit 1
}
case "$version" in
  *-0-g*) version=${version%%-0-g*} ;;
esac
printf '%s\n' "$version"