bpakk

   1 #!/bin/sh
   2
   3 #==============================================================================
   4 # bpakk
   5 # File ID: 2a4e251e-7b6f-11df-b25f-00219bfade9b
   6 #
   7 # Pack stdin with gzip and encapsulate it in base64.
   8 #
   9 # Author: Øyvind A. Holm <sunny@sunbase.org>
  10 # License: GNU General Public License version 2 or later.
  11 #==============================================================================
  12
  13 progname=bpakk
  14 VERSION=0.0.0
  15
  16 std_w=8
  17
  18 opt_decode=0
  19 opt_help=0
  20 opt_quiet=0
  21 opt_verbose=0
  22 opt_w=$std_w
  23
  24 while test -n "$1"; do
  25         case "$1" in
  26         -d|--decode) opt_decode=1; shift ;;
  27         -h|--help) opt_help=1; shift ;;
  28         -q|--quiet) opt_quiet=$(($opt_quiet + 1)); shift ;;
  29         -v|--verbose) opt_verbose=$(($opt_verbose + 1)); shift ;;
  30         -w) opt_w="$2"; shift 2 ;;
  31         --version) echo $progname $VERSION; exit 0 ;;
  32         --) shift; break ;;
  33         *)
  34                 if printf '%s\n' "$1" | grep -q ^-; then
  35                         echo "$progname: $1: Unknown option" >&2
  36                         exit 1
  37                 else
  38                         break
  39                 fi
  40         break ;;
  41         esac
  42 done
  43 opt_verbose=$(($opt_verbose - $opt_quiet))
  44
  45 if test "$opt_help" = "1"; then
  46         test $opt_verbose -gt 0 && { echo; echo $progname $VERSION; }
  47         cat <<END
  48
  49 Pack stdin with gzip and encapsulate it in base64.
  50
  51 Usage: $progname [options]
  52
  53 Options:
  54
  55   -d, --decode
  56     Decode gzipped base64.
  57   -h, --help
  58     Show this help.
  59   -q, --quiet
  60     Be more quiet. Can be repeated to increase silence.
  61   -v, --verbose
  62     Increase level of verbosity. Can be repeated.
  63   -w SIZE
  64     Create base64 using SIZE character chunks. To get one long chunk,
  65     use 0. Default: $std_w.
  66   --version
  67     Print version information.
  68
  69 END
  70         exit 0
  71 fi
  72
  73 if [ "$opt_decode" = "1" ]; then
  74         base64 -di | gunzip --stdout --force
  75         exit
  76 fi
  77
  78 gzip -9 | base64 -w $opt_w | tr '\n' ' ' | sed 's/ $//'
  79 echo
  80
  81 # vim: set ts=8 sw=8 sts=8 noet fo+=w tw=79 fenc=UTF-8 :