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 declare -r myname='pacscripts'
  28 declare -r myver='@PACKAGE_VERSION@'
  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: $myname 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: $myname gconf-editor"
  57         echo "Example: $myname gconf-editor-2.24.1-1-x86_64.pkg.tar.gz"
  58 }
  59
  60 version() {
  61         printf "%s %s\n" "$myname" "$myver"
  62         echo 'Copyright (c) 2009 Giulio "giulivo" Fidente <giulivo.navigante@gmail.com>'
  63         echo 'Copyright (c) 2009 Xavier Chantry <shiningxc@gmail.com>'
  64 }
  65
  66 spacman() {
  67         if [ $EUID -eq 0 ]; then
  68                 pacman "$@"
  69         else
  70                 if ! type -p sudo; then
  71                         error "Cannot find the sudo binary! Is sudo installed?"
  72                         error "Otherwise try to run the program as root"
  73                         exit 1
  74                 else
  75                         sudo pacman "$@"
  76                 fi
  77         fi
  78 }
  79
  80 print_db() {
  81         pkg=$(pacman -Q "$1")
  82         pkg=${pkg/ /-}
  83         if [ -f $pac_db/$pkg*/install ]; then
  84                 cat $pac_db/$pkg*/install
  85                 echo
  86                 return 0
  87         else
  88                 error "Package $1 does not include any .INSTALL script"
  89                 return 1
  90         fi
  91 }
  92
  93 print_pkg() {
  94         if ! bsdtar -xOf "$1" .INSTALL 2>/dev/null; then
  95                 error "Package $1 does not include any .INSTALL script"
  96                 return 1
  97         fi
  98         echo
  99 }
 100
 101 print_scriptlet() {
 102         if [ -f "$1" ]; then
 103                 if bsdtar tf "$1" .PKGINFO &>/dev/null; then
 104                         print_pkg "$1"
 105                         return
 106                 fi
 107         fi
 108         if pacman -Q "$1" &>/dev/null; then
 109                 print_db "$1"
 110                 return
 111         fi
 112         if ! pacman -Si $1 &>/dev/null; then
 113                 error "Package $1 not found"
 114                 return 1
 115         fi
 116         url=$(spacman -Sdp $1 | tail -n1)
 117         filename=$(basename $url)
 118         if [ ! -f "$pac_cache/$filename" ]; then
 119                 if ! spacman -Sdw --noconfirm $1 >&2; then
 120                         error "Failed to download $1"
 121                         return 1
 122                 fi
 123                 echo >&2
 124         fi
 125         print_pkg "$pac_cache/$filename"
 126         return
 127 }
 128
 129 if [ $# -ne 1 ] ; then
 130         usage
 131         exit 1
 132 fi
 133
 134 case "$1" in
 135         --help|-h) usage; exit 0 ;;
 136         --version|-V) version; exit 0 ;;
 137         *) print_scriptlet $1 ;;
 138 esac