common


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#!/hint/bash

gen_rev() {
  printf 'REV:%s\n' "$(
    date -u -Iseconds \
    | sed 's@+00:00$@Z@'
  )"
}

git_dir="$1"

if [ ! -d "${git_dir}" ]; then
  >&2 printf 'invalid git dir: "%s"\n' "${git_dir}"
  exit 1
fi