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#!/bin/bash
# blacklist-diffs - locates the upstream repo in which each blacklist entry exists;
# and identifies blacklist entries which do not exist upstream
#
# Copyright (C) 2023 bill-auger <bill-auger@programmer.net>
#
# SPDX-License-Identifier: AGPL-3.0-or-later
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
#
#
# TODO: determine which non-existing packages should exist on a per-arch basis,
# perhaps with a cross-arch compare filter, or per-arch supplemental blacklists
# (eg: blacklist.txt (all arches) , blacklist-armv7h.txt (armv7h only) , ...)
## constants ##
readonly DEBUG=0
readonly BLACKLIST=/usr/share/doc/your-freedom/blacklist.txt
readonly ARCH_MIRROR=http://mirror.cyberbits.eu/archlinux
readonly ARCH_REPOS=( community{,-testing} core extra testing multilib{,-testing} )
readonly TEMP_DB_NAME=blacklist-diffs
readonly BLACKLIST_ERR_MSG="this script requires the 'your-freedom' package"
readonly UNPRIVILEGED_ERR_MSG="this script requires super-user privileges"
readonly CBLUE='\033[0;36m'
readonly CRED='\033[0;31m'
readonly CYELLOW='\033[0;33m'
readonly CEND='\033[0m'
BlacklistedPkgs=( $(sed 's|:.*||' ${BLACKLIST}) )
DbTempdirs=() # Init()
## helpers ##
DBG() # (log_fmt [fmt_args]*)
{
local log_fmt=$1
local fmt_args=( "${@:2}" )
(( DEBUG )) && printf "${CYELLOW}${log_fmt}${CEND}\n" "${fmt_args[@]}" >&2 || :
}
Log() # (log_fmt [fmt_args]*)
{
local log_fmt=$1
local fmt_args=( "${@:2}" )
printf "${CBLUE}${log_fmt}${CEND}\n" "${fmt_args[@]}" >&2
}
LogError() # (log_fmt [fmt_args]*)
{
local log_fmt=$1
local fmt_args=( "${@:2}" )
printf "${CRED}ERROR: ${log_fmt}${CEND}\n" "${fmt_args[@]}" >&2
}
Exit() # (log_fmt [fmt_args]*)
{
LogError "$@" ; exit 1 ;
}
PacmanOpts() # (db_tempdir)
{
local db_tempdir=$1
echo "--dbpath=${db_tempdir} --config=${db_tempdir}/pacman.conf"
}
## business ##
Init() # (upstream_arch mirror_url repos*)
{
local upstream_arch=$1
local mirror_url=$2
local repos=( ${@:3} )
# Setup the temporary directory
local db_tempdir="$(mktemp --tmpdir -d "${TEMP_DB_NAME}-${upstream_arch}.XXXXXXXXXX")"
DbTempdirs+=( ${db_tempdir} )
# populate the temporary package database
Log "updating database ...."
cd ${db_tempdir}
printf "[options]\nArchitecture = ${upstream_arch}\n" > pacman.conf
for repo in ${repos[@]}
do printf "[${repo}]\nServer = ${mirror_url}/\$repo/os/\$arch\n" >> pacman.conf
done
sudo pacman $(PacmanOpts ${db_tempdir}) -Sy &> /dev/null
echo ${db_tempdir}
DBG "Init() db_tempdir=${db_tempdir}=$(printf "\n\t%s" $(ls ${db_tempdir}))"
}
Compare() # (db_tempdir)
{
local db_tempdir=$1
local upstream_arch=$(sed "s|.*/${TEMP_DB_NAME}-\([^\.]*\)\..*|\1|" <<<${db_tempdir})
local upstream_pkgs=( $(pacman $(PacmanOpts ${db_tempdir}) -Ss | cut -d ' ' -f 1) )
local blacklisted_pkg upstream_pkg
DBG "Compare() db_tempdir=${db_tempdir}"
DBG "Compare() PacmanOpts=$(PacmanOpts ${db_tempdir})"
DBG "Compare() upstream_arch=${upstream_arch}"
DBG "Compare() upstream_pkgs=${upstream_pkgs[*]:0:4}"
DBG "Compare() n_blacklisted_pkgs=${#BlacklistedPkgs[*]}"
DBG "Compare() n_upstream_pkgs=${#upstream_pkgs[*]}"
Log "comparing (${#BlacklistedPkgs[*]}) blacklisted packages to (${#upstream_pkgs[*]}) ${upstream_arch} packages ...."
for blacklisted_pkg in ${BlacklistedPkgs[*]}
do upstream_pkg="$(grep ^[^/]*/${blacklisted_pkg}$ <(printf "%s\n" ${upstream_pkgs[*]}) || \
echo '<NONE>' | cut -d ' ' -f 1 )"
echo "${upstream_pkg} ${blacklisted_pkg}"
done | sort | column -t
}
trap "for tmpdir in ${DbTempdirs[*]} ; do rm -rf -- ${tmpdir} ; done ;" EXIT
[[ -f "${BLACKLIST}" ]] || Exit "${BLACKLIST_ERR_MSG}"
(( ${#BlacklistedPkgs[*]} )) || Exit "${BLACKLIST_ERR_MSG}"
sudo pacman -Ss pacman &> /dev/null || Exit "${UNPRIVILEGED_ERR_MSG}"
Compare $(Init x86_64 ${ARCH_MIRROR} ${ARCH_REPOS[*]})
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