#!/bin/bash # # sogrep - find shared library links in an Arch Linux repository. # # Copyright (c) 2019 by Eli Schwartz <eschwartz@archlinux.org> # # SPDX-License-Identifier: GPL-3.0-or-later m4_include(lib/common.sh) # globals fallback_mirror='https://geo.mirror.pkgbuild.com' : ${SOCACHE_DIR:="${XDG_CACHE_HOME:-${HOME}/.cache}/sogrep"} m4_include(lib/valid-repos.sh) arches=('x86_64') # options REFRESH=0 VERBOSE=0 source /usr/share/makepkg/util/parseopts.sh source /usr/share/makepkg/util/util.sh recache() { local repo arch fallback_linksdburl linksdburl mirror verbosity=-s (( VERBOSE )) && verbosity=--progress-bar for repo in "${_repos[@]}"; do if [[ -n "$SOLINKS_MIRROR" ]]; then mirror="$SOLINKS_MIRROR" elif ! mirror="$(set -o pipefail; pacman-conf --repo "$repo" Server 2>/dev/null | head -n1)"; then mirror="$fallback_mirror" fi for arch in "${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 ${repo}.links.tar.gz..." if [[ "$mirror" == *"/${repo}/os/${arch}" ]]; then linksdburl="${mirror}/${repo}.links.tar.gz" else linksdburl="${mirror}/${repo}/os/${arch}/${repo}.links.tar.gz" fi fallback_linksdburl="${fallback_mirror}/${repo}/os/${arch}/${repo}.links.tar.gz" if curl -fLR "${verbosity}" -o "${dbpath}" -z "${dbpath}" "$linksdburl"; then : elif [[ "$linksdburl" != "$fallback_linksdburl" ]] \ && curl -fLR "${verbosity}" -o "${dbpath}" -z "${dbpath}" "$fallback_linksdburl"; then : else echo "error: failed to download links database for repo ${repo}" exit 1 fi done done } is_outdated_cache() { local repo arch # links databases are generated at about the same time every day; we should # attempt to check for new database files if any of them are over a day old for repo in "${_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 (( $# == 2 )) || exit 0 fi search "$@"