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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>
#
# 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
(( $# == 2 )) || exit 0
fi
search "$@"
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