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#!/hint/bash

alpine_keys=(
  'NICKNAME'
  'FN'
  'EMAIL'
  'FCC'
  'COMMENT'
)

keys=(
  'UID'
  "${alpine_keys[@]}"
  'REV'
)

find_vcs() {
  {
    find "${git_dir}" \
      -name '.git' \
      -prune \
      , \
      -type f \
      -name '*.vcs' \
      -printf '%p\n'
    git -C "${git_dir}" archive HEAD \
    | tar -t \
    | sed '
      /\.vcs$/!d
      s@^@'"${git_dir%/}"'/@
    '
  } \
  | sort -u
}

git_dir="$1"

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