contrib/pacscripts.in

   1 #!/bin/bash
   2 #
   3 #   pacscripts : tries to print out the {pre,post}_{install,remove,upgrade}
   4 #   scripts of a given package
   5 #
   6 #   Copyright (c) 2009 Giulio "giulivo" Fidente <giulivo.navigante@gmail.com>
   7 #   Copyright (c) 2009 Xavier Chantry <shiningxc@gmail.com>
   8 #
   9 #   This program is free software; you can redistribute it and/or modify
  10 #   it under the terms of the GNU General Public License as published by
  11 #   the Free Software Foundation; either version 2 of the License, or
  12 #   (at your option) any later version.
  13 #
  14 #   This program is distributed in the hope that it will be useful,
  15 #   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 #   GNU General Public License for more details.
  18 #
  19 #   You should have received a copy of the GNU General Public License
  20 #   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 #
  22
  23 # bash options
  24 set -o nounset
  25 set -o errexit
  26
  27 progname=$(basename $0)
  28 progver="0.4"
  29
  30 conf="@sysconfdir@/pacman.conf"
  31
  32 if [ ! -r "$conf" ]; then
  33         echo "ERROR: unable to read $conf"
  34         exit 1
  35 fi
  36
  37 eval $(awk '/DBPath/ {print $1$2$3}' "$conf")
  38 eval $(awk '/CacheDir/ {print $1$2$3}' "$conf")
  39 pac_db="${DBPath:-@localstatedir@/lib/pacman}/local"
  40 pac_cache="${CacheDir:-@localstatedir@/cache/pacman/pkg}"
  41
  42 error() {
  43         local mesg=$1; shift
  44         printf "==> $(gettext "ERROR:") ${mesg}\n" "$@" >&2
  45 }
  46
  47 usage() {
  48         echo "This program prints out the {pre,post}_{install,remove,upgrade} scripts"
  49         echo "of a given package."
  50         echo "Usage: $progname pkgname|pkgfile"
  51         echo
  52         echo " OPTIONS:"
  53         echo "  -h, --help                 Print this help message"
  54         echo "  -v, --version              Print program name and version"
  55         echo
  56         echo "Example: $progname gconf-editor"
  57         echo "Example: $progname gconf-editor-2.24.1-1-x86_64.pkg.tar.gz"
  58 }
  59
  60 spacman() {
  61         if [ $EUID -eq 0 ]; then
  62                 pacman "$@"
  63         else
  64                 if ! type -p sudo; then
  65                         error "Cannot find the sudo binary! Is sudo installed?"
  66                         error "Otherwise try to run the program as root"
  67                         exit 1
  68                 else
  69                         sudo pacman "$@"
  70                 fi
  71         fi
  72 }
  73
  74 print_db() {
  75         pkg=$(pacman -Q "$1")
  76         pkg=${pkg/ /-}
  77         if [ -f $pac_db/$pkg*/install ]; then
  78                 cat $pac_db/$pkg*/install
  79                 echo
  80                 return 0
  81         else
  82                 error "Package $1 does not include any .INSTALL script"
  83                 return 1
  84         fi
  85 }
  86
  87 print_pkg() {
  88         if ! bsdtar -xOf "$1" .INSTALL 2>/dev/null; then
  89                 error "Package $1 does not include any .INSTALL script"
  90                 return 1
  91         fi
  92         echo
  93 }
  94
  95 print_scriptlet() {
  96         if [ -f "$1" ]; then
  97                 if bsdtar tf "$1" .PKGINFO &>/dev/null; then
  98                         print_pkg "$1"
  99                         return
 100                 fi
 101         fi
 102         if pacman -Q "$1" &>/dev/null; then
 103                 print_db "$1"
 104                 return
 105         fi
 106         if ! pacman -Si $1 &>/dev/null; then
 107                 error "Package $1 not found"
 108                 return 1
 109         fi
 110         url=$(spacman -Sdp $1 | tail -n1)
 111         filename=$(basename $url)
 112         if [ ! -f "$pac_cache/$filename" ]; then
 113                 if ! spacman -Sdw --noconfirm $1 >&2; then
 114                         error "Failed to download $1"
 115                         return 1
 116                 fi
 117                 echo >&2
 118         fi
 119         print_pkg "$pac_cache/$filename"
 120         return
 121 }
 122
 123 if [ $# -ne 1 ] ; then
 124         usage
 125         exit 1
 126 fi
 127
 128 case "$1" in
 129         --help|-h) usage; exit 0 ;;
 130         --version|-v) echo "$progname version $progver"; exit 0 ;;
 131         *) print_scriptlet $1 ;;
 132 esac