#!/bin/sh

set -eu

PPT_VERSION='@PPT_VERSION@'
PLATFORM=
MAINTAINER_NAME=
MAINTAINER_MAILBOX=

main()
{
	local date=

	while [ "x${PLATFORM}" = 'x' ]; do
		prompt 'Platform' PLATFORM
		if [ "x${PLATFORM#*[^a-z0-9-]}" != "x${PLATFORM}" ]; then
			printf 'Error: Platform name may consist only of %s\n' \
				'lowercase Latin letters, digits, and hypens' \
				>&2
			PLATFORM=''
		fi
	done
	prompt 'Maintainer name' MAINTAINER_NAME
	prompt 'Maintainer e-mail address' MAINTAINER_MAILBOX

	if [ "x${MAINTAINER_NAME#\"}" = "x${MAINTAINER_NAME}" ]; then
		if [ "x${MAINTAINER_NAME#*[()<>\[\]:;@\\,.]}" != \
				"x${MAINTAINER_NAME}" ]; then
			MAINTAINER_NAME="\"${MAINTAINER_NAME}\""
		fi
	fi
	if [ "x${MAINTAINER_MAILBOX#<}" = "x${MAINTAINER_MAILBOX}" ]; then
		MAINTAINER_MAILBOX="<${MAINTAINER_MAILBOX}>"
	fi

	date="$(LC_ALL='POSIX' date '+%a, %d %b %Y %H:%M:%S %z')"

	printf '2.0\n' >format

	cat >control <<-EOF
		Maintainer: ${MAINTAINER_NAME} ${MAINTAINER_MAILBOX}
		Build-Depends:
		 opkbuild (>= 4.2.1-3),
		 platconf-pkg-tools (>= ${PPT_VERSION%.*}),
		EOF

	cat >changelog <<-EOF
		config-${PLATFORM} (1) trunk

		  * Initial release.

		 -- ${MAINTAINER_NAME} ${MAINTAINER_MAILBOX}  ${date}
		EOF

	mkdir src src/build src/run

	cat >build <<-EOF
		#!/usr/bin/make -f

		include /usr/share/platconf-pkg-tools/build.mk
		EOF
	chmod 0755 build

	printf 'ppt_version=%d\n' ${PPT_VERSION%%.*} >ppt-version

	>copyright

	cat <<-EOF

Package generated.

Put build-time configuration files in either src/build/<package>_<upstream-ver>
or src/build/<package>, e.g.:
    src/build/busybox_1.30.1/config
    src/build/linux-libre-4.19/config

Put run-time configuration files in src/run/<package>, e.g.:
    src/run/lilo/etc/lilo.conf.in

Then run ppt-mkpkgs to generate metadata files for binary packages.
EOF
}

prompt()
{
	local msg="${1}"
	local var="${2}"

	printf '%s:\n> ' "${msg}"
	read -r "${var}"
}

main "${@}"