#!/bin/bash

PACKER_LOG_FILE='./packer.log'
SOURCES="$(for FILE in *.pkr.hcl; do cat $FILE | awk 'BEGIN{f=0} {if($1 ~ /build/ && $2 ~ /{/){f=1};if(f == 1){if($1 ~ /sources/ && $2 ~ /=/ && $3 ~ /\[/){f=2;next}};if(f == 2){if($1 ~ /\]/) {f=0}};if(f == 2){print $0}}' | sed -E 's/"//g;s/,//g;s/sources\.//g'; done)"

SOURCE=''
NO_PAKER_INIT=''
NO_PKG_INSTALL=''

# Use $PATH to find packer
PACKER='packer'

# ------------------------------------------------------------------------------
Usage()
{
    cat <<EOF
Usage:

  $0 -s <source name> [option]
    source name:
EOF
    for SRC in $SOURCES; do
		echo -e "\t$SRC"
    done
cat <<EOF
    option:
      -n           - Do not run packer init;
      -p           - Do not packages install;
  Display this help and exit:
    $0 -h

EOF
}

# ------------------------------------------------------------------------------
CheckSource()
{
	local INSOURCE="$1"
	for SRC in $SOURCES; do
		[ "X$SRC" = "X$INSOURCE" ] && return 0
    done
	return 1
}

while getopts "s:hnp" OPTION; do
    case $OPTION in
        's') SOURCE="$OPTARG" ;;
        'n') NO_PAKER_INIT='Y' ;;
        'p') NO_PKG_INSTALL='Y' ;;
        'h') Usage; exit 0 ;;
    esac
done

shift $(($OPTIND-1))
OPTIND=1

[ -z "$SOURCE" ] && { Usage; exit 1; }

CheckSource "$SOURCE" || { echo "Unknown source: $SOURCE"; exit 1; }

if [ -z "$NO_PKG_INSTALL" ]; then
	if which dnf &>/dev/null; then
		sudo dnf install edk2-ovmf libvirt libvirt-daemon-kvm ansible-core libnsl
	fi
fi

[ -z "$NO_PAKER_INIT" ] && $PACKER init -upgrade . || exit 1

PACKER_LOG=1 $PACKER build  -only=$SOURCE . 2>$PACKER_LOG_FILE || exit 1