brew/Library/Homebrew/shims/utils.sh

set +o posix

quiet_safe_cd() {
  cd "$1" &>/dev/null || { echo "Error: failed to cd to $1" >&2; exit 1; }
}

absdir() {
  quiet_safe_cd "${1%/*}/" && pwd -P
}

dirbasepath() {
  local dir="$1"
  local base="${2##*/}"
  echo "${dir}/${base}"
}

realpath() {
  local path="$1"
  local dir
  local dest

  dir="$(absdir "${path}")"
  path="$(dirbasepath "${dir}" "${path}")"

  while [[ -L "${path}" ]]
  do
    dest="$(readlink "${path}")"
    if [[ "${dest}" = "/"* ]]
    then
      path="${dest}"
    else
      path="${dir}/${dest}"
    fi
    dir="$(absdir "${path}")"
    path="$(dirbasepath "${dir}" "${path}")"
  done

  echo "${path}"
}

executable() {
  local file="$1"
  [[ -f "${file}" && -x "${file}" ]]
}

lowercase() {
  echo "$1" | tr "[:upper:]" "[:lower:]"
}

safe_exec() {
  local arg0="$1"
  if ! executable "${arg0}"
  then
    return
  fi
  # prevent fork-bombs
  if [[ "$(lowercase "${arg0}")" = "${SHIM_FILE}" || "$(realpath "${arg0}")" = "${SHIM_REAL}" ]]
  then
    return
  fi
  if [[ "${HOMEBREW}" = "print-path" ]]
  then
    local dir
    dir="$(quiet_safe_cd "${arg0%/*}/" && pwd)"
    local path
    path="$(dirbasepath "${dir}" "${arg0}")"
    echo "${path}"
    exit
  fi
  exec "$@"
}

try_exec_non_system() {
	local file="$1"
  shift

	IFS=$'\n'
	for path in $(type -aP "${file}")
	do
	  if [[ "${path}" != "/usr/bin/${file}" ]]
	  then
	    safe_exec "${path}" "$@"
	  fi
	done
	unset IFS
}


SHIM_FILE="${0##*/}"
SHIM_REAL="$(realpath "$0")"

if [[ "$1" = --homebrew=* ]]
then
  HOMEBREW="${1:11}"
  shift
fi