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path: root/contrib/paclog-pkglist.sh.in
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#!/bin/bash
#
# paclog-pkglist - Parse a log file into a list of currently installed packages
#
# Copyright (C) 2011 Dave Reisner <dave@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 <http://www.gnu.org/licenses/>.

declare -r myname='paclog-pkglist'
declare -r myver='@PACKAGE_VERSION@'

export TEXTDOMAIN='pacman'
export TEXTDOMAINDIR='/usr/share/locale'
declare logfile=${1:-@localstatedir@/log/pacman.log}

usage() {
        printf "%s (pacman) v%s\n" "${myname}" "${myver}"
        echo
        echo "Parse a log file into a list of currently installed packages"
        echo
        printf "Usage: %s [path to pacman log]\n" "${myname}"
        echo
        printf "Example: %s @localstatedir@/log/pacman.log\n" "${myname}"
        echo
        echo 'Defaults to: @localstatedir@/log/pacman.log'
}

version() {
        printf "%s %s\n" "$myname" "$myver"
        echo 'Copyright (C) 2011 Dave Reisner <dave@archlinux.org>'
}

if [[ $1 ]]; then
        if [[ $1 = -@(h|-help) ]]; then
                usage
                exit 0
        elif [[ $1 = -@(V|-version) ]]; then
                version
                exit 0
        elif [[ ! -e $logfile ]]; then
                printf $"target not found: %s\n" "$1"
                exit 1
        fi
fi

<"$logfile" awk '
{
        if ($3 ~ /^\[.*\]$/) {
                # new style with caller name
                action  = $4
                pkgname = $5
                pkgver  = $6
                upgver  = $8
                nfields = NF
        } else {
                action  = $3
                pkgname = $4
                pkgver  = $5
                upgver  = $7
                nfields = (NF + 1)    # compensate for missing caller field
        }
}

nfields == 6 && action == "installed" {
        gsub(/[()]/, "", pkgver)
        pkg[pkgname] = pkgver
        next
}

nfields == 8 && (action == "upgraded" || action == "downgraded") {
        sub(/\)/, "", upgver)
        pkg[pkgname] = upgver
        next
}

nfields == 6 && action == "removed" {
        pkg[pkgname] = -1
}

END {
        for (i in pkg) {
                if (pkg[i] != -1) {
                        printf "%s %s\n",i,pkg[i]
                }
        }
}' | sort

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