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# Functions for handling packages and their dependencies
#
# Copyright (C) 2013, 2014 Patrick "P. J." McDermott
#
# This file is part of the ProteanOS Development Kit.
#
# The ProteanOS Development Kit 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.
#
# The ProteanOS Development Kit 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 the ProteanOS Development Kit. If not, see
# <http://www.gnu.org/licenses/>.
resolve_deps()
{
local new_pkgs="${1}"
local deps="${2}"
local all_deps=
local new_deps=
local pkg=
all_deps=''
new_pkgs="${new_pkgs} "
while [ "x${new_pkgs}" != 'x' ]; do
all_deps="${all_deps}${new_pkgs}"
new_deps=''
for pkg in ${new_pkgs}; do
case "${pkg}" in
*[!a-z0-9+.-]*) continue;;
esac
new_deps="${new_deps} $(printf '%s' "${deps}" | \
sed -n "s/^${pkg}: *//p")"
done
new_deps="$(printf '%s\n' ${new_deps} | sort -u)"
new_pkgs=''
for pkg in ${new_deps}; do
if [ "x${all_deps# ${pkg} }" = "x${all_deps}" ]; then
new_pkgs="${new_pkgs}${pkg} "
fi
done
done
printf '%s\n' "${all_deps% }"
}
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