#!/bin/bash

# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# This script generates the list of board overlays and variants.

# Load common constants.  This should be the first executable line.
# The path to common.sh should be relative to your script's location.
. "$(dirname "$0")/../common.sh"

get_default_board

# Flags
DEFINE_string board "$DEFAULT_BOARD" "The name of the board to set up."
DEFINE_string board_overlay "" "Location of the board overlay."
DEFINE_string variant "" "Board variant."

# Parse command line flags
FLAGS "$@" || exit 1
eval set -- "${FLAGS_ARGV}"

# Only now can we die on error.  shflags functions leak non-zero error codes,
# so will die prematurely if 'set -e' is specified before now.
set -e

if [ -z "$FLAGS_board" ] ; then
  error "--board required."
  exit 1
fi

if [[ $FLAGS_board =~ [_\ ] ]] ; then
  error "--board name must not contain an underscore (_) or a space ( )."
  exit 1
fi

if [[ $FLAGS_variant =~ [_\ ] ]] ; then
  error "--variant name must not contain an underscore (_) or a space ( )."
  exit 1
fi

#
# Check for chromeos-overlay.
#
CHROMEOS_OVERLAY="${SRC_ROOT}/private-overlays/chromeos-overlay"

if [ -d "${CHROMEOS_OVERLAY}" ]; then
  echo "${CHROMEOS_OVERLAY}"
fi

#
# Check if there are any board overlays.  There should be at least a top
# level board specific overlay.
#
PRIMARY_BOARD_OVERLAY="${SRC_ROOT}/overlays/overlay-${FLAGS_board}"

if [ -d "${PRIMARY_BOARD_OVERLAY}" ]; then
  echo "${PRIMARY_BOARD_OVERLAY}"

  #
  # Add the public variant overlay
  #
  if [ -n "$FLAGS_variant" ] ; then
    VARIANT_NAME="overlay-variant-${FLAGS_board}-${FLAGS_variant}"
    VARIANT_OVERLAY="${SRC_ROOT}/overlays/${VARIANT_NAME}"

    if [ ! -d "$VARIANT_OVERLAY" ] ; then
      error "Can't find variant overlay directory $VARIANT_OVERLAY"
      exit 1
    fi

    echo "${VARIANT_OVERLAY}"
  fi

  #
  # Add any private overlays and variant overlays for this board.
  #
  if [ -d "${SRC_ROOT}/private-overlays" ] ; then
    OVERLAY_NAME="overlay-${FLAGS_board}-private"
    PRIVATE_OVERLAY="${SRC_ROOT}/private-overlays/${OVERLAY_NAME}"

    if [ -d "${PRIVATE_OVERLAY}" ] ; then
      echo "${PRIVATE_OVERLAY}"
    fi

    #
    # Add the public and private variant overlays
    #
    if [ -n "$FLAGS_variant" ] ; then
      VARIANT_NAME="overlay-variant-${FLAGS_board}-${FLAGS_variant}-private"
      PRIVATE_VARIANT_OVERLAY="${SRC_ROOT}/private-overlays/${VARIANT_NAME}"

      if [ -d "${PRIVATE_VARIANT_OVERLAY}" ] ; then
        echo "${PRIVATE_VARIANT_OVERLAY}"
      fi
    fi
  fi
fi

#
# Finally, add in any user requested board overlays.
#
if [ -d "${FLAGS_board_overlay}" ] ; then
  echo "${FLAGS_board_overlay}"
fi