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#!/bin/bash
# Librerelease
# Uploads packages into [staging]

# Copyright 2010 Nicolás Reynolds
# Copyright 2013 Luke Shumaker
# For just the create_signature() function:
#   Copyright (c) 2006-2013 Pacman Development Team <pacman-dev@archlinux.org>
#   Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
#   Copyright (c) 2005 by Aurelien Foret <orelien@chez.com>
#   Copyright (c) 2006 by Miklos Vajna <vmiklos@frugalware.org>
#   Copyright (c) 2005 by Christian Hamar <krics@linuxforum.hu>
#   Copyright (c) 2006 by Alex Smith <alex@alex-smith.me.uk>
#   Copyright (c) 2006 by Andras Voroskoi <voroskoi@frugalware.org>
#   Copyright (c) 2006-2013 Pacman Development Team <pacman-dev@archlinux.org>
#   Copyright (c) 2002-2006 by Judd Vinet <jvinet@zeroflux.org>
#   Copyright (c) 2005 by Aurelien Foret <orelien@chez.com>
#   Copyright (c) 2006 by Miklos Vajna <vmiklos@frugalware.org>
#   Copyright (c) 2005 by Christian Hamar <krics@linuxforum.hu>
#   Copyright (c) 2006 by Alex Smith <alex@alex-smith.me.uk>
#   Copyright (c) 2006 by Andras Voroskoi <voroskoi@frugalware.org>
#
# This file is part of Parabola.
#
# Parabola 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.
#
# Parabola 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 Parabola. If not, see <http://www.gnu.org/licenses/>.

. libremessages
. $(librelib conf.sh)

function usage {
	print "Usage: %s [OPTIONS]" "${0##*/}"
	echo
	print 'This script uploads packages on $WORKDIR/stagging'
	print "to parabola server."
	echo
	print "Options:"
	print '  -c            Clean packages on $WORKDIR/staging'
	print "  -l            Only list packages but not upload them"
	print "  -n            Dry-run; don't actually do anything"
	print "  -h            Show this message"
}

function list_packages {
	find "$WORKDIR/staging/" -mindepth 1 -type d -not -empty -printf '%f\n' |
	while read -r repo; do
		msg2 "$repo"
		find "${WORKDIR}/staging/${repo}" -type f -printf "%f\n"
	done
}

# This function is taken almost verbatim from makepkg
create_signature() {
	local ret=0
	local filename="$1"
	msg "$(gettext "Signing package...")"

	local SIGNWITHKEY=""
	if [[ -n $GPGKEY ]]; then
		SIGNWITHKEY="-u ${GPGKEY}"
	fi
	# The signature will be generated directly in ascii-friendly format
	gpg --detach-sign --use-agent ${SIGNWITHKEY} "$filename" &>/dev/null || ret=$?


	if (( ! ret )); then
		msg2 "$(gettext "Created signature file %s.")" "$filename.sig"
	else
		error "$(gettext "Failed to sign package file.")"
		return $ret
	fi
}

function sign_packages {
	if [ -z "${GPG_AGENT_INFO}" ]; then
		warning "It's better to use gpg-agent to sign packages in batches"
	fi

	for package in $(find "${WORKDIR}/staging/" -type f -iname '*.pkg.tar.?z'); do
		if [ -f "${package}.sig" ]; then
			msg2 "Package signature found, verifying..."

			# Verify that the signature is correct, else remove for re-signing
			if ! gpg --quiet --verify "${package}.sig" >/dev/null 2>&1; then
				error "Failed! Re-signing..."
				rm -f "${package}.sig"
			fi
		fi

		if ! [ -f "${package}.sig" ]; then
			create_signature "$package" || return 2
		fi
	done
}

# Remove everything that's not a package or a signature
function clean_non_packages {
	find $WORKDIR/staging/ -type f \
		\! -iname "*.pkg.tar.?z" -a \! -iname "*.pkg.tar.?z.sig" \
		-delete
}

# Clean everything if not on dry-run mode
function clean {
	if [[ -n "${dryrun}" ]]; then
		:
	else
		msg "Removing files from local staging directory"
		# use '-exec rm' instead of '-delete' to be verbose
		find "${WORKDIR}/staging" -type f -exec rm -fv {} +
	fi
}

function main {
	if [ -w / ]; then
		error "This program should be run as regular user"
		return 1
	fi

	# Parse options
	local dryrun=""
	local mode="release_packages"
	while getopts 'clnh' arg; do
		case $arg in
			c) mode=clean ;;
			l) mode=list_packages ;;
			n) dryrun="--dry-run" ;;
			h) mode=usage ;;
			*) usage >/dev/stderr; return 1 ;;
		esac
	done
	shift $(($OPTIND - 1))
	if [[ $# != 0 ]]; then
		usage >/dev/stderr
		return 1
	fi

	if [[ $mode == usage ]]; then
		usage
		return 0
	fi

	load_files makepkg
	check_vars makepkg GPGKEY
	load_files libretools
	check_vars libretools WORKDIR REPODEST || return 1
	# The following variables are actually optional
	#check_vars libretools HOOKPRERELEASE HOOKPOSTRELEASE || return 1

	"$mode"
}

function release_packages {
	if [[ -n $HOOKPRERELEASE ]]; then
		msg "Running HOOKPRERELEASE..."
		bash -c "${HOOKPRERELEASE}"
	fi

	clean_non_packages
	sign_packages || return 1

	# Make the permissions of the packages 644 otherwise the user will get access
	# denied error when they try to download (rsync --no-perms doesn't seem to
	# work).
	find ${WORKDIR}/staging -type f -exec chmod 644 {} \;
	find ${WORKDIR}/staging -type d -exec chmod 755 {} \;

	msg "%s to upload" $(du -h -d 0 ${WORKDIR}/staging | tr "\t" " " | cut -d" " -f1)
	msg "Uploading packages..."
	if ! rsync --recursive \
		${dryrun} \
		--no-group \
		--no-perms \
		--copy-links \
		--hard-links \
		--partial \
		--prune-empty-dirs \
		--human-readable \
		--progress \
		-e "ssh " \
		${WORKDIR}/staging \
		${REPODEST}/
	then
		error "Sync failed, try again"
		return 1
	fi

	clean

	msg "Running db-update on repos"
	ssh ${REPODEST%%:*} dbscripts/db-update

	if [[ -n $HOOKPOSTRELEASE ]]; then
		msg "Running HOOKPOSTRELEASE..."
		bash -c "${HOOKPOSTRELEASE}"
	fi

	return 0
}

main "$@"