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#! /bin/sh
#
# opkhelper
# src/oh-copyconfig
# Copy build-time or run-time platform configuration files.
#
# Copyright (C) 2012 Patrick "P. J." McDermott
#
# 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/>.

print_usage()
{
	printf 'Usage: %s\n' "$1"
}

error()
{
	printf 'oh-copyconfig: Error:  %s\n' "${1}" >&2
	exit 1
}

if [ ! -f ../config ]; then
	printf 'oh-copyconfig: No config files to copy.\n'
	exit 0
fi

if [ -z "${OH_PLATFORM}" ]; then
	error 'No target platform defined'
fi

if [ ${#} -ne 0 ]; then
	print_usage ${0} >&2
	exit 1
fi

while read -r type src dest; do
	if [ -z "${type}" -o -z "${src}" -o -z "${dest}" ]; then
		error 'Invalid syntax in config list'
	fi
	case "${type}" in
		runtime)
			# The destiest dest that ever dest.
			full_dest="dest${dest}"
			;;
		buildtime)
			# A less desty dest.
			full_dest="${dest}"
			;;
		*)
			error "Invalid config type \"${type}\""
			;;
	esac
	# Make sure the destination directory exists.
	mkdir -p "$(dirname "${full_dest}")"
	# Find the config package files.
	if [ -d "/usr/share/config/${OH_PLATFORM}/${OH_SRCPKG}-${OH_PKGVER}" ]; then
		full_src="/usr/share/config/${OH_PLATFORM}/${OH_SRCPKG}-${OH_PKGVER}/${src}"
	elif [ -d "/usr/share/config/${OH_PLATFORM}/${OH_SRCPKG}" ]; then
		full_src="/usr/share/config/${OH_PLATFORM}/${OH_SRCPKG}/${src}"
	else
		# This shouldn't happen unless the package maintainer neglected to add
		# the config package to the package's Build-Depends field.
		error 'No platform config directory found'
	fi
	# Copy the config file(s).
	printf 'oh-copyconfig: Copying "%s" to "%s"...\n' "${src}" "${dest}"
	mkdir -p "$(dirname "${full_dest}")"
	cp -p "${full_src}" "${full_dest}" || error "Cannot copy \"${src}\""
done < ../config