configure

#!/usr/bin/env bash
#This configure script is copied from spdk/configure

cd $(dirname $0)

set -e

trap 'echo -e "\n\nConfiguration failed\n\n" >&2' ERR

function usage()
{
	echo "'configure' configures IBOF to compile on CUSTOM FLAGS."
	echo ""
	echo "Usage: ./configure [OPTION]..."
	echo ""
	echo "Defaults for the options are specified in brackets."
	echo ""
	echo "General:"
	echo " -h, --help                Display this help and exit"
	echo ""
	echo "Specifying Configuration Variables:"
	echo "--with-DEPENDENCY[=path]   Use the given config parameter."    
	echo "--without-DEPENDENCY       Do not use this config parameter."
	echo ""
	echo "Valid dependencies are listed below."
	echo " mfs-raid                  Build IBOF with Meta FileSystem with RAID1 capability"
	echo " library-build             Build IBOF with library"
	echo " fpic                      Build IBOF with fpic option"	
	echo " gcov                      Build IBOF with gcov"	
    echo " fe-qos                    Build IBOF with FE QoS"
	echo ""
	echo "Address Sanitizer Setting:"
	echo "--with-asan                Build IBOF with ASAN"
	echo "--without-asan             Build IBOF without ASAN"
    #Just another example 
    #echo " mbr-mock                  Build IBOF with mock mbr."
	echo ""
}

# Load default values
# Convert config to sourcable configuration file
sed -r 's/CONFIG_([[:alnum:]_]+)=(.*)/CONFIG[\1]=\2/g' mk/IBOF_CONFIG > IBOF_CONFIG.sh
declare -A CONFIG
source IBOF_CONFIG.sh
rm IBOF_CONFIG.sh


function check_dir() {
	arg="$1"
	dir="${arg#*=}"
	if [ ! -d "$dir" ]; then
		echo "$arg: directory not found"
		exit 1
	fi
}

for i in "$@"; do
	case "$i" in
		-h|--help)
			usage
			exit 0
			;;
		--with-mfs-raid)
			CONFIG[MFS_RAID]=y
			;;
		--without-mfs-raid)
			CONFIG[MFS_RAID]=n
			;;
		--with-library-build)
			CONFIG[LIBRARY_BUILD]=y
			;;
 		--without-library-build)
			CONFIG[LIBRARY_BUILD]=n
			;;
 		--with-mockfs)
			CONFIG[USE_MOCK_FS]=y
			;;
 		--without-mockfs)
			CONFIG[USE_MOCK_FS]=n
			;;
		--with-gcov)
			CONFIG[GCOV]=y
			;;
		--without-gcov)
			CONFIG[GCOV]=n
			;;
		--with-fpic)
			CONFIG[FPIC]=y
			;;
		--without-fpic)
			CONFIG[FPIC]=n
			;;
        --with-fe-qos)
            CONFIG[FE_QOS]=y
            ;;
        --without-fe-qos)
            CONFIG[FE_QOS]=n
            ;;
		--with-asan)
			CONFIG[ASAN]=y
			;;
		--without-asan)
			CONFIG[ASAN]=n
			;;
		--)
			break
			;;
		*)
			echo "Unrecognized option $i"
			usage
			exit 1
	esac
done

# We are now ready to generate final configuration. But first do sanity
# check to see if all keys in CONFIG array have its reflection in CONFIG file.
if [ $(egrep -c "^\s*CONFIG_[[:alnum:]_]+=" mk/IBOF_CONFIG) -ne ${#CONFIG[@]} ]; then
	echo ""
	echo "BUG: Some configuration options are not present in CONFIG file. Please update this file."
	echo "Missing options in CONFIG (+) file and in current config (-): "
	diff -u --label "mk/IBOF_CONFIG file" --label "CONFIG[@]" \
		<(sed -r -e '/^\s*$/d; /^\s*#.*/d; s/(CONFIG_[[:alnum:]_]+)=.*/\1/g' mk/IBOF_CONFIG | sort) \
		<(printf "CONFIG_%s\n" ${!CONFIG[@]} | sort)
	exit 1
fi

echo -n "Creating mk/ibof_config.mk..."
cp -f mk/IBOF_CONFIG mk/ibof_config.mk
for key in ${!CONFIG[@]}; do
	sed -i.bak -r "s#^\s*CONFIG_${key}=.*#export CONFIG_${key}\?=${CONFIG[$key]}#g" mk/ibof_config.mk
done

config_h="mk/ibof_config.h"
rm -rf ${config_h}; touch ${config_h}
echo "#pragma once" >> ${config_h}
echo "" >> ${config_h}
python script/genconfig.py >> ${config_h}


# On FreeBSD sed -i 'SUFFIX' - SUFFIX is mandatory. So no way but to delete the backed file.
rm -f mk/ibof_config.mk.bak

if [[ "$OSTYPE" == "freebsd"* ]]; then
	echo "Type 'gmake' to build."
else
	echo "Type 'make' to build."
fi

exit 0