#!/bin/bash

######################################################
# Make sure script has been sourced
#

if [ "$0" = "$BASH_SOURCE" ]; then
	echo "####################################"
	echo " ERROR : YOU MUST SOURCE THE SCRIPT"
	echo "####################################"
	exit 1
fi

BUILD_DIR=$1

# Init env var
ROOT_DIR=`realpath $PWD`
META_DIR="meta-kineintercom"

if [ "a${DL_DIR}" = "a" ]; then
	DL_DIR="$ROOT_DIR/oe-downloads"
fi

if [ "a${SSTATE_DIR}" = "a" ]; then
	SSTATE_DIR="$ROOT_DIR/sstate-cache"
fi

# Use utf-8 encoding
if ! echo $LANG | grep -q "en_US.UTF-8"
then
	export LANG="en_US.UTF-8"
fi

if [ "a${DISTRO}" = "a" ]; then
	DISTRO="kineintercom"
fi

if [ "a${MACHINE}" = "a" ]; then
	MACHINE="raspberrypi"
fi

_TEMPLATECONF="${ROOT_DIR}/${META_DIR}/conf/template/"

######################################################
# Standard Openembedded init
#

echo -e "[source ${ROOT_DIR}/poky/oe-init-build-env]"
TEMPLATECONF=${_TEMPLATECONF} source ${ROOT_DIR}/poky/oe-init-build-env ${BUILD_DIR} > /dev/null 2> /dev/null

_FORMAT_PATTERN='::-::'

######################################################
# Choose target machine
#
conf_machine() {
	local choices=$(find ${ROOT_DIR}/${META_DIR}/conf/machine -name "*.conf" 2>/dev/null | sort | uniq)
	for ITEM in $choices
	do
		if [[ -z $(grep "#@DESCRIPTION" $ITEM) ]]; then
			echo ""
			echo "ERROR: No '#@DESCRIPTION' field available in $__CONFIG file:"
			echo "$ITEM"
			echo ""
			return 1
		fi
	done
	unset ITEM
	if [ $(echo $choices | wc -l) -eq 1 ]; then
		# return only file name (distro or machine)
		echo "$(echo $choices | sed 's|^.*/\(.µ\)\.conf|\1|')"
	else
		echo "$(echo $choices | xargs grep "#@DESCRIPTION" | sed 's|^.*/\(.*\)\.conf:#DESCRIPTION:[ \t]*\(.*$\)|\1'"${_FORMAT_PATTERN}"'\2|')"
	fi
}

######################################################
# Apply configuration to site.conf file
#

conf_siteconf() {
	_NCPU=$(grep '^processor' /proc/cpuinfo 2>/dev/null | wc -l)
	# Sanity check that we have a valid number, if not then fallback to a safe default
	[ "$_NCPU" -ge 1 ] 2>/dev/null || _NCPU=2

	cat > conf/site.conf <<EOF
#
# local.conf covers user settings, site.conf covers site specific information
# such as proxy server addresses and optionally any shared download location
#
# SITE_CONF_VERSION is increased each time build/conf/site.conf
# changes incompatibly
SCONF_VERSION = "1"

BB_NUMBER_THREADS = "${_NCPU}"
PARALLEL_MAKE = "-j ${_NCPU}"

# Where to place downloads
DL_DIR = "${DL_DIR}"
# Where to place shared-state files
SSTATE_DIR = "${SSTATE_DIR}"

# Machine Selection
MACHINE = "${MACHINE}"

# Default policy config
DISTRO = "${DISTRO}"

# Package Management configuration
PACKAGE_CLASSES = "package_deb"

# Additional image features
USER_CLASSES = "buildstats"

# Interactive shell configuration
PATCHRESOLVE = "noop"

EOF
}

######################################################
# Update bblayer.conf file
#
update_layerconf() {
	cp $1/conf/template/bblayers.conf.sample conf/bblayers.conf
}

######################################################
# Extract description for images provided 
#
list_images_descr() {
	list_images=$1
	if [ "z$ZSH_NAME" != "z" ]; then
		# zsh don't split strnig as expected
		eval "list_images=($list_images)"
	fi

	for l in $list_images;
	do
		local image=`echo $1 | sed -e 's#^./\([^/]*\).bb$#\1#'`
		if [ ! -z "$(grep "^SUMMARY[ \t]*=" $1)" ]; then
			local descr=`grep "^SUMMARY[ \t]*=" $1 | sed -e 's/^.*"\(.*\)["\]$/\1/'`
		else
			local descr=`grep "^DESCRIPTION[ \t]*=" $1 | sed -e 's/^.*"\(.*\)["\]$/\1/'`
		fi
		if [ -z "$descr" ] && [ "$2" == "ERR" ]; then
			echo ""
			echo "ERROR: No description available for image: $image"
			echo "$1"
			echo ""
			return 1
		else
			printf "    %-33s  -   $descr\n" $image
		fi
	done
}

######################################################
# alias function: list all images available 
#
list_images() {
	local metalayer=$1
	if [[ -z $metalayer ]] || ! [[ -e "$ROOT_DIR/$metalayer" ]]; then
		echo ""
		echo "ERROR: Cannot find layer '$metalayer' at $ROOT_DIR/ root."
		echo "Please use full meta layer path from baseline root:"
		echo "eg: 'stoe_list_images openembedded-core'"
		echo ""
		return 1
	fi
	local LIST=`find $ROOT_DIR/$metalayer/* -wholename "*/images/*.bb" | grep -v meta-skeleton | sort`
	echo ""
	echo "=========================================================="
	echo "Available images for '$metalayer' layer are:"
	echo ""
	list_images_descr "$LIST" "ERR"
	echo ""
}

echo "** DL_DIR: ${DL_DIR}"
echo "** SSTATE_DIR: ${SSTATE_DIR}"
echo "** DISTRO: ${DISTRO}"
echo "** MACHINE: ${MACHINE}"
touch conf/local.conf

if [ -f conf/site.conf ]; then
	echo "====> !!!! [WARNING] site.conf already exists. Nothing done ... !!!!"
else
	conf_siteconf
fi

update_layerconf ${ROOT_DIR}/${META_DIR}

list_images ${META_DIR}