homebrew-items() {
  local items
  local sed_extended_regex_flag
  local find_filter=$1
  local sed_filter=$2
  local grep_filter=$3

  # HOMEBREW_MACOS is set by brew.sh
  # shellcheck disable=SC2154
  if [[ -n "${HOMEBREW_MACOS}" ]]; then
    sed_extended_regex_flag="-E"
  else
    sed_extended_regex_flag="-r"
  fi

  # HOMEBREW_REPOSITORY is set by brew.sh
  # shellcheck disable=SC2154
  items="$( \
    find "${HOMEBREW_REPOSITORY}/Library/Taps" \
         -type d \( \
           -name "${find_filter}" -o \
           -name cmd -o \
           -name .github -o \
           -name lib -o \
           -name spec -o \
           -name vendor \
          \) \
         -prune -false -o -name '*\.rb' | \
    sed "${sed_extended_regex_flag}" \
      -e 's/\.rb//g' \
      -e 's_.*/Taps/(.*)/(home|linux)brew-_\1/_' \
      -e "${sed_filter}" \
  )"
  local shortnames
  shortnames="$(echo "${items}" | cut -d "/" -f 3)"
  echo -e "${items}\n${shortnames}" | \
    grep -v "${grep_filter}" | \
    sort -uf
}