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# ProteanOS Development Kit
# lib/feed.sh
# Functions for handling feed index files
#
# Copyright (C) 2013 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/>.
[ "x${_FEED_SM+set}" = 'xset' ] && return 0
_FEED_SM=1
use fd
use control
feed_dep_fields=
feed_pkg_cb=
feed_deps_cb=
feed_fname_cb=
feed_pkgs=
feed_pkg_include=
feed_pkg=
feed_deps=
feed_download()
{
local feed_index="${1}"
wget -q -O - "${feed_index}"
return 0
}
feed_find_pkgs()
{
local feed_idx="${1}"
local dep_fields="${2}"
local pkg_cb="${3}"
local deps_cb="${4}"
local fname_cb="${5}"
feed_dep_fields=" $(printf '%s ' ${dep_fields})"
feed_pkg_cb="${pkg_cb}"
feed_deps_cb="${deps_cb}"
feed_fname_cb="${fname_cb}"
feed_pkgs=''
feed_pkg_include='false'
feed_pkg=''
feed_deps=''
parse_control "${feed_idx}" feed_field_cb feed_para_cb 'Package'
printf '%s\n' "${feed_pkgs# }"
return 0
}
feed_field_cb()
{
local name="${1}"
local value="${2}"
if [ "x${name}" = 'xPackage' ]; then
feed_pkg="${value}"
elif [ "x${name}" = 'xFilename' ]; then
${feed_fname_cb} "${feed_pkg}" "${value}"
elif [ "x${feed_dep_fields#* ${name} }" != "x${feed_dep_fields}" ]; then
feed_deps="${feed_deps}${value}, "
fi
if ${feed_pkg_cb} ${name} ${value}; then
feed_pkg_include='true'
fi
return 0
}
feed_para_cb()
{
local new_deps=
local dep=
if ${feed_pkg_include}; then
feed_pkgs="${feed_pkgs} ${feed_pkg}"
fi
new_deps=''
IFS=','
for dep in ${feed_deps%, }; do
unset IFS
# Trim off versions and disjunctions.
dep="${dep%%(*}"
dep="${dep%%|*}"
# Trim whitespace.
# XXX: This doesn't actually trim multiple spaces.
dep="${dep##[ ${HT}${LF}]}"
dep="${dep%%[ ${HT}${LF}]}"
new_deps="${new_deps} ${dep}"
done
unset IFS
${feed_deps_cb} "${feed_pkg}" "${new_deps# }"
feed_pkg_include='false'
feed_pkg=''
feed_deps=''
return 0
}
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