kickstart/lib/kickstart-root-dir

#!/bin/bash

_kickstart_readlink() {
  (
  TARGET_FILE=$1

  cd "$(dirname "$TARGET_FILE")"
  TARGET_FILE=$(basename "$TARGET_FILE")

  while [ -L "$TARGET_FILE" ]
  do
    TARGET_FILE=$(readlink "$TARGET_FILE")
    cd "$(dirname "$TARGET_FILE")"
    TARGET_FILE=$(basename "$TARGET_FILE")
  done

  PHYS_DIR=$(pwd -P)
  RESULT=$PHYS_DIR/$TARGET_FILE
  echo "$RESULT"
  )
}

path_to_kickstart=$(which kickstart)
if [[ $(uname) == "Darwin" ]]; then
  resolved_path_to_kickstart_bin=$(_kickstart_readlink "$path_to_kickstart")
else
  resolved_path_to_kickstart_bin=$(readlink -f "$path_to_kickstart")
fi
dirname "$(dirname "$resolved_path_to_kickstart_bin")"