contrib/updpkgsums.sh.in

   1 #!/bin/bash
   2 #
   3 # updpkgsums - update source checksums in-place in PKGBUILDs
   4 #
   5 # Copyright (C) 2012 Dave Reisner <dreisner@archlinux.org>
   6 #
   7 # This program is free software; you can redistribute it and/or
   8 # modify it under the terms of the GNU General Public License
   9 # as published by the Free Software Foundation; either version 2
  10 # of the License, or (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 shopt -s extglob
  21
  22 declare -r myname='updpkgsums'
  23 declare -r myver='@PACKAGE_VERSION@'
  24
  25 usage() {
  26         printf 'usage: %s [buildfile]\n\n' "$myname"
  27         printf '    -h, --help        display this help message and exit\n'
  28         printf '    -V, --version     display version information and exit\n\n'
  29         printf '%s will perform an in place update the checksums in the\n' "$myname"
  30         printf 'path specified by [buildfile], defaulting to PKGBUILD in the current\n'
  31         printf 'working directory.\n'
  32 }
  33
  34 version() {
  35         printf "%s %s\n" "$myname" "$myver"
  36         echo 'Copyright (C) 2012 Dave Reisner <dreisner@archlinux.org>'
  37 }
  38
  39 case $1 in
  40         -h|--help) usage; exit ;;
  41         -V|--version) version; exit ;;
  42 esac
  43
  44 buildfile=${1:-PKGBUILD}
  45 if [[ ! -f $buildfile ]]; then
  46         printf '==> ERROR: %s not found or is not a file\n' "$buildfile"
  47         exit 1
  48 fi
  49
  50 # Resolve any symlinks to avoid replacing the symlink with a file. But, we
  51 # have to do this portably -- readlink's flags are inconsistent across OSes.
  52 while [[ -L $buildfile ]]; do
  53         buildfile=$(readlink "$buildfile")
  54         if [[ $buildfile = */* ]]; then
  55                 cd "${buildfile%/*}"
  56                 buildfile=${buildfile##*/}
  57         fi
  58 done
  59
  60 # cd into the directory with the build file. This avoids creating random src/
  61 # directories scattered about the filesystem, and avoids cases where we might
  62 # not be able to write in the $PWD.
  63 if [[ $buildfile = */* ]]; then
  64         cd "${buildfile%/*}"
  65         buildfile=${buildfile##*/}
  66 fi
  67
  68 # Check $PWD/ for permission to unlink the $buildfile and write a new one
  69 if [[ ! -w . ]]; then
  70         printf $'==> ERROR: No write permission in `%s\'\n' "$PWD"
  71         exit 1
  72 fi
  73
  74 {
  75         # Generate the new sums and try to unlink the file before writing stdin back
  76         # into it. This final precaution shouldn't fail based on the previous checks,
  77         # but it's better to be extra careful before unlinking files.
  78         newsums=$(makepkg -g -p "$buildfile") && rm -f "$buildfile" &&
  79         exec awk -v newsums="$newsums" '
  80         /^[[:blank:]]*(md|sha)[[:digit:]]+sums=/,/\)[[:blank:]]*(#.*)?$/ {
  81                 if (!w) {
  82                         print newsums
  83                         w++
  84                 }
  85                 next
  86         }
  87
  88         1
  89         END { if (!w) print newsums }
  90         ' > "$buildfile"
  91 } < "$buildfile"
  92
  93 # vim: set ts=2 sw=2 noet: