#!/usr/bin/env bash # libredbdiff # # Copyright (C) 2014 Esteban Carnevale # Copyright (C) 2014, 2017 Luke Shumaker # # License: GNU GPLv3+ # # 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 . set -euE -o pipefail . "$(librelib messages)" . "$(librelib conf)" setup_traps declare -r name="Libredbdiff" declare -r cmd="${0##*/}" declare -r conffile_prbl="$statedir/pacman.conf.parabola" declare -r conffile_arch="$statedir/pacman.conf.archlinux" declare -r dbpath_prbl="$statedir/pacman.parabola" declare -r dbpath_arch="$statedir/pacman.archlinux" declare -r mirrorlist_prbl="$statedir/mirrorlist.parabola" declare -r mirrorlist_arch="$statedir/mirrorlist.archlinux" declare -r field_pkgname_prbl=30 declare -r field_pkgname_arch=30 declare -r field_pkgname_total="$((field_pkgname_prbl + field_pkgname_arch))" declare -r printf_format="%s %-${field_pkgname_prbl}s%-${field_pkgname_arch}s %s | %s\n" declare -r printf_format_noarch="%s %-${field_pkgname_total}s %s\n" enablerepo() { local repo="$1" local conffile_arg="$2" msg2 "Enabling repo %q in %q" "$repo" "$conffile_arg" sed -i "s/\#\[$repo\]/[$repo]/" "$conffile_arg" sed -i "\/\[$repo\]/,+1 s/#Include/Include/" "$conffile_arg" } createdir() { local dir=$1 if ! [[ -d "$dir" ]] ; then msg "Creating directory %q" "$dir" mkdir -- "$dir" || die "Failed to create directory %q. Exiting." "$dir" fi } # {{ A -lt B }} is like [ A -lt B ], but for pacman version numbers {{() { [[ $# = 4 ]] || panic [[ $4 = '}}' ]] || panic local a=$1 local op=$2 local b=$3 local cmp cmp="$(vercmp "$a" "$b")" || die "vercmp failed" [ "$cmp" "$op" 0 ] } # Globals: # - pkgname : the Parabola pkgname # - ver_prbl : a map of pkgname->arch_pkgver # - ver_arch : a map of pkgname->prbl_pkgver # - provides : a map of pkgname->provides compare_pkgs() { if [[ -n "${ver_arch[$pkgname]:-}" ]]; then if {{ "${ver_prbl[$pkgname]}" -lt "${ver_arch[$pkgname]}" }}; then printf "$printf_format" \ '=' \ "$pkgname" \ "" \ "${ver_prbl[$pkgname]}" \ "${ver_arch[$pkgname]}" fi elif [[ -n "${provides[$pkgname]:-}" ]]; then local _provides provide read -r -a _provides <<<"${provides[$pkgname]}" for provide in "${_provides[@]}"; do if [[ -n "${ver_arch[$provide]:-}" ]]; then if {{ "${ver_prbl[$pkgname]}" -lt "${ver_arch[$provide]}" }}; then printf "$printf_format" \ 'p' \ "$pkgname" \ "$provide" \ "${ver_prbl[$pkgname]}" \ "${ver_arch[$provide]}" fi fi done else printf "$printf_format_noarch" \ 'o' \ "$pkgname" \ "${ver_prbl[$pkgname]}" fi } # Globals: # - prbl_packages_tmp # - ver_prbl # - ver_arch (transitively through compare_pkgs) # - provides print_cmp() { local repo="$1" < "$prbl_packages_tmp" \ awk -F/ -v repo="$repo" '$1 == repo {print $2}' | while read -r pkgname _pkgver _provides ; do ver_prbl["$pkgname"]="$_pkgver" provides["$pkgname"]="$_provides" compare_pkgs done } usage() { print "Usage: sudo %q" "$cmd" print " or: %q -n [REPO]" "$cmd" print " or: %q -h" "$cmd" print 'Show packages that need to be updated from Arch repositories.' echo prose "Compares packages in Parabola repositories. Packages from all configured Parabola repositories are compared. A Parabola repository name can be specified as argument to compare only packages in that repository." echo prose "The default mode of operation requires root, and downloads or updates all necessary files for comparison, but does not compare them. After that mode has been run, run the tool again without root with the the \`-n\` flag to not download anything, but to compare the already downloaded files." echo prose "In the compare mode (if the \`-n\` flag is given), by default it will iterate over each of the configured repositories, prefixing each section with a line in the format \`[REPO]\`. However, if a REPO is specified on the command line, it scan for packages only in that repository, and no \`[REPO]\` line will be printed." echo print 'Options:' flag '-n' "Don't update anything, just compare already downloaded files." flag '-h' 'Show this message' echo prose "In the compare mode the output is in the format:" echo print '\t[repo]' print '\tpkgline' print '\tpkgline' print '\t...' print '\t[repo]' print '\tpkgline' print '\tpkgline' print '\t...' echo prose "That is, the output is organized by Parabola repository, and within each repository section, there is one line for each package in that Parabola repo that seems to be behind the equivalent package in Arch." echo print "The line-format for packages is:" printf "\t$printf_format" \ status parabola_pkgname '[arch_pkgname]' parabola_pkgver arch_pkgver echo print "Where 'status' is one of the characters:" flag '=' "An Arch package with the same pkgname as a Parabola package was found, and Arch has a higher pkgver than Parabola. In this case, arch_pkgname is not present (as it is the same as the parabola_pkgname)." flag 'p' "An Arch package with a pkgname that is provide'd by a Parabola package was found, and the pkgver of the Arch package is higher than the pkgver of the parabola package." flag 'o' "It appears that this Parabola package is not a replacement for an Arch package." } main() { local args arg mode=update badargs=false args="$(getopt -n "$cmd" -o nh -l noupdate,help -- "$@")" || badargs=true eval "set -- $args" while [[ $# -gt 0 ]]; do arg=$1 shift case "$arg" in -n|--noupdate) mode=compare ;; -h|--help) usage return 0 ;; --) break ;; esac done if $badargs; then usage >&2 return 2 fi case $mode in update) if [[ $# -gt 0 ]]; then print "%s: found non-flag arguments; a repo list may only be specified with the -n flag: %s" "$cmd" "$*" >&2 usage >&2 return 2 fi main_update ;; compare) if [[ $# -gt 1 ]]; then print "%s: found too many non-flag arguments; only one repo may be specified: %s" "$cmd" "$*" >&2 usage >&2 return 2 fi if [[ $# = 1 ]]; then if ! in_array "$1" "${repos[@]}"; then die "The specified Parabola repo \"%s\" cannot be compared. It's not in the list of repos in the configuration variable \"repos\"." "$1" fi fi main_compare "$@" ;; esac } main_update() { if [[ $EUID != 0 ]]; then error "Must run as root to initialize or update %s databases." "$cmd" usage >&2 exit 1 fi load_conf libredbdiff.conf statedir mirror_prbl mirror_arch || exit createdir "$statedir" { msg "Generating %s %q" Parabola pacman.conf cp -T /usr/share/pacman/defaults/pacman.conf.x86_64 "$conffile_prbl" sed -r \ -e "s|/etc/pacman\.d/mirrorlist$|$mirrorlist_prbl|" \ -e "s|^#?DBPath\s*=.*|DBPath = $dbpath_prbl|" \ -e "s|^#?Architecture\s*=.*|Architecture = x86_64|" \ -i "$conffile_prbl" local repo for repo in multilib {libre,pcr,nonprism}{,-multilib}; do enablerepo "$repo" "$conffile_prbl" done msg "Generating %s %q" Arch pacman.conf wget -q \ -O "$conffile_arch" \ "https://git.archlinux.org/svntogit/packages.git/plain/pacman/repos/core-x86_64/pacman.conf.x86_64" || die "Failed to download %q. Exiting." "$conffile_arch" sed -r \ -e "s|/etc/pacman\.d/mirrorlist$|$mirrorlist_arch|" \ -e "s|^#?DBPath\s*=.*|DBPath = $dbpath_arch|" \ -e "s|^#?Architecture\s*=.*|Architecture = x86_64|" \ -i "$conffile_arch" enablerepo multilib "$conffile_arch" printf 'Server = %s\n' "$mirror_prbl" > "$mirrorlist_prbl" printf 'Server = %s\n' "$mirror_arch" > "$mirrorlist_arch" } createdir "$dbpath_prbl" { msg "Synchronizing %s pacman databases for %s" "$name" "Parabola" pacman --config "$conffile_prbl" -Sy || die "Failed to synchronize pacman database for %s. Exiting." Parabola } createdir "$dbpath_arch" { msg "Synchronizing %s pacman databases for %s" "$name" "Arch" pacman --config "$conffile_arch" -Sy || die "Failed to synchronize pacman database for %s. Exiting." Arch } msg "%s pacman databases are updated. %s is ready. Run %q -n to print results." \ "$name" "$name" "$cmd" } main_compare() { load_conf libredbdiff.conf statedir repos || exit if ! [[ -f "$conffile_prbl" && \ -f "$conffile_arch" && \ -f "$dbpath_prbl/sync/libre.db" && \ -f "$dbpath_arch/sync/core.db" ]] then error "You must run %q with out arguments as root to initialize." "$cmd" usage >&2 exit 1 fi local tmpdir tmpdir="$(mktemp --tmpdir -d "$cmd.XXXXXXXXXX")" || die "Could not create temporary working directory" trap "rm -rf -- $(printf %q "$tmpdir")" RETURN local arch_packages_tmp="$tmpdir/arch-packages" local prbl_packages_tmp="$tmpdir/parabola-packages" unset provides ver_prbl ver_arch declare -gA provides ver_prbl ver_arch expac --config "$conffile_arch" -S '%n %v' \ > "$arch_packages_tmp" || \ die "expac command to get %s package data has failed. Exiting." Arch local pkgname pkgver while read -r pkgname pkgver; do ver_arch["$pkgname"]="$pkgver" done < "$arch_packages_tmp" expac --config "$conffile_prbl" -S '%r/%n %v %S' \ > "$prbl_packages_tmp" || \ die "expac command to get %s package data has failed. Exiting." Parabola if [[ $# == 1 ]]; then print_cmp "$1" else for repo in "${repos[@]}" ; do echo "[$repo]" print_cmp "$repo" done fi } main "$@"