configure

#!/bin/bash
set -eu


print_usage() {
	echo "Usage: ${0##*/} [-h] -f FEEDS_FILE [-v VERSION] [-d PATH]" >&2
}

usage_fail() {
	echo "${0##*/}:" "$@" >&2
	print_usage
	exit 1
}

print_help() {
	print_usage
	cat >&2 <<EOF
Configuration script for Turris Updater Lists.

Options:
  -f PATH
    This is required argument. It specifies path to feeds.conf file. This
    file is used to generate appropriate repository index.
  -v VERSION
    This allows you to set Turris OS version printed on repository list
    inclusion. In default 'unknown' is used.
  -d PATH
    Optional output destination. In default './output' is used.
  -h
    Prints this help text and terminates execution.
EOF
}


feeds=""
tos_version="unknown"
destdir="$PWD/output"

while getopts ":hf:v:d:" OPT; do
	case "$OPT" in
		h)
			print_help
			exit 0
			;;
		f)
			[ -r "$OPTARG" ] \
				|| usage_fail "Feeds has to be valid path to feeds.conf file: $OPTARG"
			feeds="$(readlink -f "$OPTARG")"
			;;
		v)
			tos_version=""$OPTARG""
			;;
		d)
			destdir="$(readlink -f "$OPTARG")"
			;;
		\?)
			usage_fail "Illegal option: $OPTARG"
			;;
	esac
done
shift $((OPTIND-1))
[ "$#" -eq 0 ] || usage_fail "Unexpected argument:" "$1"

[ -n "$feeds" ] \
	|| usage_fail "-f argument has to be specified to set valid path to feeds.conf."


if [ "$(readlink -f "${0%/*}")" != "$PWD" ]; then
	# Create/update external Makefile
	cat > Makefile <<EOF
# This is external Makefile for turris-updater-lists.
SOURCE = ${0%/*}
MAKEARGS := --no-print-directory -C "\$(SOURCE)" O="\$(shell pwd)"
Q ?= @

.PHONY: all \$(MAKECMDGOALS)
all \$(MAKECMDGOALS):
	\$(Q)\$(MAKE) \$(MAKEARGS) \$@
EOF
fi

# Output configuration file
cat > .config.mk <<-EOF
	FEEDS ?= ${feeds}
	TOS_VERSION ?= ${tos_version}
	DESTDIR ?= ${destdir}
EOF