#!/bin/sh

# Copyright (C) 2015 Daniel Baumann <mail@daniel-baumann.ch>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

set -e

case "$(basename ${0})" in
	p*)
		MODE="progress-linux"
		;;

	b*)
		MODE="bfh"
		;;
esac

PROGRAM="${0}"

case "$(dpkg --print-architecture)" in
#	arm64)
#		CPUS="1"
#		export DEB_BUILD_OPTIONS=parallel=${CPUS}
#		;;

	*)
		CPUS="$(nproc)"
		export DEB_BUILD_OPTIONS=parallel=${CPUS}
		;;
esac

Parameters()
{
	LONG_OPTIONS="auto,build:,distribution:,interactive,nocheck,package:,tag:,upload,"
	OPTIONS="a,b:,d:,i,n,p:,t:,u,"

	PARAMETERS="$(getopt --longoptions ${LONG_OPTIONS} --name=${PROGRAM} --options ${OPTIONS} --shell sh -- ${@})"

	if [ "${?}" != "0" ]
	then
		echo "${PROGRAM}: getopt exit" >&2
		exit 1
	fi

	eval set -- "${PARAMETERS}"

	while true
	do
		case "${1}" in
			-a|--auto)
				AUTO="true"
				shift 1
				;;

			-b|--build)
				BUILD="${2}"
				shift 2
				;;

			-d|--distribution)
				DISTRIBUTION="${2}"
				shift 2
				;;

			-i|--interactive)
				INTERACTIVE="true"
				shift 1
				;;

			-n|--nocheck)
				NOCHECK="true"
				shift 1
				;;

			-p|--package)
				PACKAGE="$(echo ${2} | sed -e 's|/$||g')"
				shift 2
				;;

			-t|--tag)
				TAG="${2}"
				shift 2
				;;

			-u|--upload)
				UPLOAD="true"
				shift
				;;

			--)
				shift
				break
				;;

			*)
				echo "${PROGRAM}: getopt error" >&2
				exit 1
				;;
		esac
	done
}

Parameters "${@}"

if [ -z "${DISTRIBUTION}" ] || [ -z "${PACKAGE}" ]
then
	echo "Usage: ${PROGRAM} [-b|--build BUILD] -d|--distribution DISTRIBUTION -p|--package PACKAGE -t|--tag TAG[,TAG,...]" >&2
	exit 1
fi

INTERACTIVE="${INTERACTIVE:=false}"

if [ -e "${PACKAGE}" ]
then
	echo "${PACKAGE}: directory already exists"
	exit 1
fi

TAGS="$(echo ${TAG} | sed -e 's|,| |g')"

if [ -z "${BUILD}" ]
then
	case "$(dpkg --print-architecture)" in
		amd64) # FIXME
			BUILD="source,binary-arch,binary-indep"
			;;

		arm*|i386) # FIXME
			BUILD="binary-arch"
			;;
	esac
fi

TARGET="${PACKAGE}"

case "${MODE}" in
	progress-linux)
		REPOSITORY="https://git.progress-linux.org/packages/${DISTRIBUTION}/${PACKAGE}"
		BRANCH="progress-linux"
		SERVER="https://apt.progress-linux.org"
		;;

	bfh)
		REPOSITORY="https://git.bfh.science/packages/${DISTRIBUTION}/${PACKAGE}"
		BRANCH="bfh"
		SERVER="https://apt.bfh.science"
		;;
esac

for TAG in ${TAGS} HEAD
do
	# if no tag is specified, build head.
	# if a tag is specified, don't (additionally) build head
	if [ "${TAG}" = "HEAD" ]
	then
		if [ -z "${TAGS}" ]
		then
			TAG=""
		else
			continue
		fi
	fi

	for BUILD in $(echo ${BUILD} | sed -e 's|,| |g')
	do
		echo "################################################################################"
		echo "Building ${BUILD} ($(dpkg --print-architecture)) package: ${PACKAGE} ${VERSION}"
		echo "################################################################################"

		case "${BUILD}" in
			source)
				if [ -n "${TAG}" ]
				then
					GIT_BRANCH="${TAG}"
					git clone --branch ${GIT_BRANCH} "${REPOSITORY}" "${TARGET}"
				else
					GIT_BRANCH="${BRANCH}"
					#git clone --depth 1 --no-single-branch --branch ${GIT_BRANCH} "${REPOSITORY}" "${TARGET}"
					git clone --no-single-branch --branch ${GIT_BRANCH} "${REPOSITORY}" "${TARGET}"
				fi

				cd "${TARGET}"

				VERSION="$(dpkg-parsechangelog | awk '/^Version: / { print $2 }')"

				SOURCE_VERSION="$(echo ${VERSION} | awk -F: '{ print $2 }')"
				SOURCE_VERSION="${SOURCE_VERSION:-${VERSION}}"

				UPSTREAM_VERSION="$(echo ${SOURCE_VERSION} | awk -F- '{ $NF=""; print $0 }' | sed -e 's| |-|g' -e 's|-$||')"

				if [ -z "${UPSTREAM_VERSION}" ] && echo "${SOURCE_VERSION}" | grep -qs '+progress[0-9]*'
				then
					UPSTREAM_VERSION="$(echo ${SOURCE_VERSION} | awk -F\\+progress '{ print $1 }')"
				fi

				if [ -z "${UPSTREAM_VERSION}" ] && echo "${SOURCE_VERSION}" | grep -qs '+bfh[0-9]*'
				then
					UPSTREAM_VERSION="$(echo ${SOURCE_VERSION} | awk -F\\+bfh '{ print $1 }')"
				fi

				rm -rf .git
				mv debian ../
				cd "${OLDPWD}"

				mv "${TARGET}" "${TARGET}-${UPSTREAM_VERSION}"

				for DISTRIBUTION in engywuck fuchur
				do
					if [ ! -e "${TARGET}_${UPSTREAM_VERSION}.orig.tar.xz" ]
					then
						wget ${SERVER}/archive/$(echo ${DISTRIBUTION} | cut -d- -f 1)/${PACKAGE}/orig/${TARGET}_${UPSTREAM_VERSION}.orig.tar.xz || true
						if [ ! -e ${TARGET}_${UPSTREAM_VERSION}.orig.tar.xz ]
						then
							wget ${SERVER}/archive/$(echo ${DISTRIBUTION} | cut -d- -f 1)-backports/${PACKAGE}/orig/${TARGET}_${UPSTREAM_VERSION}.orig.tar.xz || true
							if [ ! -e ${TARGET}_${UPSTREAM_VERSION}.orig.tar.xz ]
							then
								wget ${SERVER}/archive/$(echo ${DISTRIBUTION} | cut -d- -f 1)-extras/${PACKAGE}/orig/${TARGET}_${UPSTREAM_VERSION}.orig.tar.xz || true
								if [ ! -e ${TARGET}_${UPSTREAM_VERSION}.orig.tar.xz ]
								then
									wget ${SERVER}/archive/$(echo ${DISTRIBUTION} | cut -d- -f 1)-backports-extras/${PACKAGE}/orig/${TARGET}_${UPSTREAM_VERSION}.orig.tar.xz || true
								fi
							fi
						fi
					fi
				done

				if [ ! -e "${TARGET}_${UPSTREAM_VERSION}.orig.tar.xz" ]
				then
					echo "Creating ${TARGET}_${UPSTREAM_VERSION}.orig.tar.xz ..."
					tar cfJ "${TARGET}_${UPSTREAM_VERSION}.orig.tar.xz" "${TARGET}-${UPSTREAM_VERSION}"
				else
					echo "Using existing ${TARGET}_${UPSTREAM_VERSION}.orig.tar.xz ..."
				fi

				mv debian "${TARGET}-${UPSTREAM_VERSION}"
				dpkg-source -b "${TARGET}-${UPSTREAM_VERSION}"

				rm -rf "${TARGET}-${UPSTREAM_VERSION}"

				# upload
				case "${UPLOAD}" in
					true)
						FILES="$(sed -e '1,/^Files:$/ d' ${TARGET}_${SOURCE_VERSION}.dsc | sed -e '/^[0-1a-zA-Z]/,$d' | awk '{ print $3 }')"

						rsync -aP "${FILES}" ${TARGET}_${SOURCE_VERSION}.dsc apt.progress-linux.org::upload
						rm -f "${FILES}" ${TARGET}_${SOURCE_VERSION}.dsc
						;;
				esac
				;;

			binary*)
				rm -f /tmp/control
				CONTROL="${REPOSITORY}/plain/debian/control"
				wget -q ${CONTROL} -O /tmp/control

				case "${BUILD}" in
					binary-arch)
						if ! grep -qs "^Architecture:.* any" /tmp/control && \
						   ! grep -qs "^Architecture:.* linux-any" /tmp/control && \
						   ! grep -qs "^Architecture:.* $(dpkg --print-architecture)" /tmp/control
						then
							echo "NO BINARY_ARCH, skipping."
							continue
						fi
						;;

					binary-indep)
						if ! grep -qs '^Architecture:.*all' /tmp/control
						then
							echo "NO BINARY_INDEP, skipping."
							continue
						fi
						;;
				esac

				if [ -n "${TAG}" ]
				then
					GIT_BRANCH="${TAG}"
					git clone --branch ${GIT_BRANCH} "${REPOSITORY}" "${TARGET}"
				else
					GIT_BRANCH="${BRANCH}"
					#git clone --depth 1 --no-single-branch --branch ${GIT_BRANCH} "${REPOSITORY}" "${TARGET}"
					git clone --no-single-branch --branch ${GIT_BRANCH} "${REPOSITORY}" "${TARGET}"
				fi

				cd "${TARGET}"

				rm -rf .git

				VERSION="$(dpkg-parsechangelog | awk '/^Version: / { print $2 }')"

				SOURCE_VERSION="$(echo ${VERSION} | awk -F: '{ print $2 }')"
				SOURCE_VERSION="${SOURCE_VERSION:-${VERSION}}"

				UPSTREAM_VERSION="$(echo ${SOURCE_VERSION} | awk -F- '{ $NF=""; print $0 }' | sed -e 's| |-|g' -e 's|-$||')"

				SOURCE="${TARGET}-$(echo ${SOURCE_VERSION} | sed -e 's|~|_|g' -e 's|+|.|g')"

				cd ..
				mv "${TARGET}" "${SOURCE}"
				cd "${SOURCE}"

				case "${NOCHECK}" in
					true)
						# disable tests
						for RULE in   dh_auto_test dh_auto_test-arch dh_auto_test-indep \
								override_dh_auto_test override_dh_auto_test-arch override_dh_auto_test-indep \
								execute_before_dh_auto_test execute_before_dh_auto_test-arch execute_before_dh_auto_test-indep \
								execute_after_dh_auto_test execute_after_dh_auto_test-arch execute_after_dh_auto_test-indep
						do
							if grep -qs "^${RULE}:" debian/rules
							then
								sed -i -e "s|^${RULE}:|disabled_${RULE}:|" debian/rules
							else
								echo "${RULE}:" >> debian/rules
							fi
						done
						;;
				esac

				case "${AUTO}" in
					true)
						case "${DISTRIBUTION}" in
							engywuck-backports)
								if grep -qs 'debhelper (>= 13' debian/control || \
								   grep -qs 'debhelper-compat (= 13' debian/control
								then
									sudo apt install -t engywuck-backports -y debhelper
								fi
								;;
						esac

						sudo apt build-dep -y .
						;;
				esac

				case "${INTERACTIVE}" in
					true)
						echo "${PROGRAM}: WAITING... "
						read waiting
						;;
				esac

				case "${BUILD}" in
					binary-any)
						dpkg-buildpackage -sa -us -uc
						;;

					binary-arch)
						dpkg-buildpackage -B -us -uc
						;;

					binary-indep)
						dpkg-buildpackage -A -us -uc
						;;
				esac

				cd "${OLDPWD}"

				rm -rf "${SOURCE}"

				# upload
				case "${UPLOAD}" in
					true)
						FILES="$(sed -e '1,/^Files:$/ d' ${TARGET}_${SOURCE_VERSION}_*.changes | sed -e '/^[0-1a-zA-Z]/,$d' | awk '{ print $5 }')"

						rsync -aP "${FILES}" ${TARGET}_${SOURCE_VERSION}_*.changes
						rm -f "${FILES}" ${TARGET}_${SOURCE_VERSION}_*.changes
						;;
				esac
				;;
		esac
	done
done