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#!/bin/bash
#
# sogrep - find shared library links in an Arch Linux repository.
#
# Copyright (c) 2019 by Eli Schwartz <eschwartz@archlinux.org>
#
# 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 2 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 <https://www.gnu.org/licenses/>.
#
m4_include(lib/common.sh)
# globals
: ${SOLINKS_MIRROR:="https://mirror.pkgbuild.com"}
: ${SOCACHE_DIR:="${XDG_CACHE_HOME:-${HOME}/.cache}/sogrep"}
m4_include(lib/valid-repos.sh)
arches=('x86_64')
# options
REFRESH=0
VERBOSE=0
source /usr/share/makepkg/util/parseopts.sh
source /usr/share/makepkg/util/util.sh
recache() {
local repo arch verbosity=-s
(( VERBOSE )) && verbosity=--progress-bar
for repo in "${_repos[@]}"; do
for arch in "${arches[@]}"; do
# delete extracted tarballs from previous sogrep versions
rm -rf "${SOCACHE_DIR}/${arch}/${repo}"
# fetch repo links database if newer than our cached copy
local dbpath=${SOCACHE_DIR}/${arch}/${repo}.links.tar.gz
mkdir -p "${dbpath%/*}"
(( VERBOSE )) && echo "Fetching ${repo}.links.tar.gz..."
curl -LR "${verbosity}" -o "${dbpath}" -z "${dbpath}" \
"${SOLINKS_MIRROR}/${repo}/os/${arch}/${repo}.links.tar.gz"
done
done
}
is_outdated_cache() {
local repo arch
# links databases are generated at about the same time every day; we should
# attempt to check for new database files if any of them are over a day old
for repo in "${_repos[@]}"; do
for arch in "${arches[@]}"; do
local dbpath=${SOCACHE_DIR}/${arch}/${repo}.links.tar.gz
if [[ ! -f ${dbpath} ]] || [[ $(find "${dbpath}" -mtime +0) ]]; then
return 0
fi
done
done
return 1
}
search() {
local repo=$1 arch lib=$2 srepos=("${_repos[@]}")
if [[ $repo != all ]]; then
if ! in_array "${repo}" "${_repos[@]}"; then
echo "${BASH_SOURCE[0]##*/}: unrecognized repo '$repo'"
echo "Try '${BASH_SOURCE[0]##*/} --help' for more information."
exit 1
fi
srepos=("${repo}")
fi
setup_workdir
for arch in "${arches[@]}"; do
for repo in "${srepos[@]}"; do
local prefix=
(( VERBOSE && ${#srepos[@]} > 1 )) && prefix=${repo}/
local db=${SOCACHE_DIR}/${arch}/${repo}.links.tar.gz
if [[ -f ${db} ]]; then
local extracted=${WORKDIR}/${arch}/${repo}
mkdir -p "${extracted}"
bsdtar -C "${extracted}" -xf "${db}"
while read -rd '' pkg; do
read -r match
pkg=${pkg#${extracted}/}
pkg="${prefix}${pkg%-*-*/links}"
if (( VERBOSE )); then
printf '%-35s %s\n' "${pkg}" "${match}"
else
printf '%s\n' "${pkg}"
fi
done < <(grep -rZ "${lib}" "${extracted}") | sort -u
fi
done
done | resort
}
usage() {
cat <<- _EOF_
Usage: ${BASH_SOURCE[0]##*/} [OPTIONS] REPO LIBNAME
Check the soname links database for Arch Linux repositories containing
packages linked to a given shared library. If the repository specified
is "all", then all repositories will be searched, otherwise only the
named repository will be searched.
If the links database does not exist, it will be downloaded first.
OPTIONS
-v, --verbose Show matched links in addition to pkgname
-r, --refresh Refresh the links databases
-h, --help Show this help text
_EOF_
}
# utility function to resort with multiple repos + no-verbose
resort() { sort -u; }
if (( $# == 0 )); then
echo "error: No arguments passed."
echo "Try '${BASH_SOURCE[0]##*/} --help' for more information."
exit 1
fi
OPT_SHORT='vrh'
OPT_LONG=('verbose' 'refresh' 'help')
if ! parseopts "$OPT_SHORT" "${OPT_LONG[@]}" -- "$@"; then
exit 1
fi
set -- "${OPTRET[@]}"
while :; do
case $1 in
-v|--verbose)
resort() { cat; }
VERBOSE=1
;;
-r|--refresh)
REFRESH=1
;;
-h|--help)
usage
exit 0
;;
--)
shift; break
;;
esac
shift
done
if ! (( ( REFRESH && $# == 0 ) || $# == 2 )); then
echo "error: Incorrect number of arguments passed."
echo "Try '${BASH_SOURCE[0]##*/} --help' for more information."
exit 1
fi
# trigger a refresh if requested explicitly or the cached dbs might be outdated
if (( REFRESH )) || [[ ! -d ${SOCACHE_DIR} ]] || is_outdated_cache; then
recache
(( $# == 2 )) || exit 0
fi
search "$@"
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