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#!/bin/awk -f
#
# 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/>.

BEGIN {
  if (ARGC < 2) {
    printf "usage:   log2pkglist <pacman log>\n"
    printf "example: log2pkglist /var/log/pacman.log\n"
    exit
  }
}

{
  action  = $3
  pkgname = $4
  pkgver  = $5
  upgver  = $7
}

NF == 5 && action == "installed" {
  gsub(/[()]/, "", pkgver)
  pkg[pkgname] = pkgver
  next
}

NF == 7 && action == "upgraded" {
  sub(/\)/, "", upgver)
  pkg[pkgname] = upgver
  next
}

NF == 5 && action == "removed" {
  pkg[pkgname] = -1
}

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