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#!/usr/bin/env bash
# set -x # uncomment for debug
# Builds packages from ABS recursively. It tries to find dependencies that
# aren't built or need update and then makepkg them in order.

# Copyright (C) 2011 Joshua Ismael Haase Hernández (xihh) <hahj87@gmail.com>
# Copyright (C) 2011 Nicolás Reynolds <fauno@parabola.nu>
# Copyright (C) 2013 Luke Shumaker <lukeshu@sbcglobal.net>
#
# License: GNU GPLv3+
#
# 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 Affero 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/>.

# TODO move __build to chroot

. libremessages
. "$(librelib conf.sh)"
load_files makepkg
load_files libretools
check_vars libretools FULLBUILDCMD || exit 1
# The following variables are actually optional
#check_vars libretools HOOKPKGBUILDMOD HOOKLOCALRELEASE || exit 1

## List packages on log that are on status
## usage: list_pkgs <status> <message>
#
## status: nonfree, built, failed, unstaged
list_pkgs() {
	msg="$2"
	local pkgs=($(grep "$1:" $build_dir/log)) && {
		msg "$2"
		printf '%s\n' "${pkgs[@]}" | cut -d: -f2
	}
}

## Check all build_dir, fails if one PKGBUILD is nonfree
check_nonfree() {
	find "$build_dir" -name PKGBUILD \
		-exec pkgbuild-check-nonfree {} +
	local s=$?
	pkgbuild-summarize-nonfree -q $s || return $s
}

# Removes a package from the buildorder
# $1 package name
# $2 buildorder file
remove_buildorder() {
	grep -Evw "${1}" ${2} > ${2}2
	mv -f ${2}2 ${2}

	return $?
}

successful_build() {

	if [[ "$RUN" != "$FULLBUILDCMD" ]]; then
		return 0 # Custom command or download sources
	fi

	if source .INFO && [[ -n "$repo" ]]; then

		if [[ ! -z "$HOOKLOCALRELEASE" ]]; then
			"$HOOKLOCALRELEASE" "$repo"
		fi

		msg "Updating pacman db and packages"
		sudo pacman -Sy || true

	fi

	echo "built:$(basename $PWD)" >>$build_dir/log
}

build_description() {
	list_pkgs "nonfree" "Those packages contain nonfree deps:"
	list_pkgs "built" "Those packages were built and staged:"
	list_pkgs "failed" "Those packages failed to build:"
	list_pkgs "unstaged" "Those packages couldn't be staged (missing reponame):"
}

__build() {
	pushd ${build_dir} >/dev/null

	build_packages=($(sort -gr $buildorder | cut -d: -f2)) # greater levels must be built first

	while [[ ${#build_packages[@]} -ge 1 ]]; do

		pushd "$build_dir/${build_packages[0]}" >/dev/null

		if [[ -n "${HOOKPKGBUILDMOD}" ]]; then
			${HOOKPKGBUILDMOD} || true
		fi

		eval "$RUN"; r=$?

		case $r in

			0) successful_build ;;

			*) error "There were errors while trying to build the package."
				echo "failed:$(basename $PWD)" >>$build_dir/log
				;;
		esac

		remove_buildorder "${build_packages[0]}" $buildorder || true

		# which is next package?
		build_packages=($(sort -gr $buildorder | cut -d: -f2))
		popd > /dev/null
	done

	popd >/dev/null
}

# End inmediately but print a useful message
trap_exit() {
	error "$@"
	warning "Leftover files left on $build_dir"
	mv .BUILDORDER BUILDORDER
	exit 1
}

# Trap signals from makepkg
set -E
trap 'trap_exit "(fullpkg-build) TERM signal caught. Exiting..."' TERM HUP QUIT
trap 'trap_exit "(fullpkg-build) Aborted by user! Exiting..."' INT
trap 'trap_exit "(fullpkg-build) An unknown error has occurred. Exiting..."' ERR

CLEANUP="false"
CHECKNONFREE="true"
RUN="$FULLBUILDCMD"
MESSAGE="$(_ 'Building packages')"

usage() {
	print "Usage: %s [OPTIONS] [BUILD_DIR]" "${0##*/}"
	print "Builds packages in BUILD_DIR, as set up by fullpkg-find"
	echo
	prose "Builds packages from BUILD_DIR; create BUILD_DIR using:"
	print '  $ fullpkg-find BUILD_DIR'
	echo
	prose "If no BUILD_DIR is specified, it uses the current directory."
	echo
	print "Options:"
	flag "-c" "Clean BUILD_DIR on successful build"
	flag "-N" "Don't check for freedom issues." #Also made by fullpkg-find
	flag "-r $(_ CMD)" "Use CMD instead of \${FULLBUILDCMD}"
	flag "-g" "Get sources for building packages on BUILD_DIR"
	flag "-h" "Show this message"
}

while getopts 'hNr:g' arg; do
	case $arg in
		h) usage; exit 0 ;;
		c) CLEAN ;;
		N) CHECKNONFREE="false" ;;
		r) RUN="$OPTARG"
			MESSAGE="$(_ 'Executing custom action')";;
		g) RUN='makepkg -g > /dev/null'
			MESSAGE="$(_ 'Downloading packages')";;
	esac
done

shift $(( OPTIND - 1 ))
build_dir="${1:-`pwd`}"
buildorder="${build_dir}/BUILDORDER"

if [[ ! -e "$buildorder" ]]; then
	error "This is not a build_dir. Make one using fullpkg."
	usage
	exit 1
else
	# backup BUILDORDER
	cp "$buildorder" "$build_dir/.BUILDORDER"
fi

if "$CHECKNONFREE"; then
	check_nonfree
fi

msg "$MESSAGE"
__build

if [[ "$RUN" != "$FULLBUILDCMD" ]]; then
	# Used for downloading or custom command
	mv "$build_dir/.BUILDORDER" "$buildorder"
	exit 0
elif "$CLEANUP"; then
	find "$build_dir" -mindepth 1 -delete
fi

build_description

plain "Test packages on and if they work fine librerelease."

exit 0