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_size=8
  17
  18 opt_decode=0
  19 opt_help=0
  20 opt_quiet=0
  21 opt_size=$std_size
  22 opt_verbose=0
  23 opt_wrap=0
  24
  25 while test -n "$1"; do
  26         case "$1" in
  27         -d|--decode) opt_decode=1; shift ;;
  28         -h|--help) opt_help=1; shift ;;
  29         -q|--quiet) opt_quiet=$(($opt_quiet + 1)); shift ;;
  30         -s|--size) opt_size="$2"; shift 2 ;;
  31         -v|--verbose) opt_verbose=$(($opt_verbose + 1)); shift ;;
  32         -w|--wrap) opt_wrap="$2"; shift 2 ;;
  33         --version) echo $progname $VERSION; exit 0 ;;
  34         --) shift; break ;;
  35         *)
  36                 if printf '%s\n' "$1" | grep -q ^-; then
  37                         echo "$progname: $1: Unknown option" >&2
  38                         exit 1
  39                 else
  40                         break
  41                 fi
  42         break ;;
  43         esac
  44 done
  45 opt_verbose=$(($opt_verbose - $opt_quiet))
  46
  47 if test "$opt_help" = "1"; then
  48         test $opt_verbose -gt 0 && { echo; echo $progname $VERSION; }
  49         cat <<END
  50
  51 Pack stdin with gzip and encapsulate it in base64.
  52
  53 Usage: $progname [options]
  54
  55 Options:
  56
  57   -d, --decode
  58     Decode gzipped base64.
  59   -h, --help
  60     Show this help.
  61   -q, --quiet
  62     Be more quiet. Can be repeated to increase silence.
  63   -s SIZE, --size SIZE
  64     Create base64 using SIZE character chunks. To get one long chunk,
  65     use 0. Default: $std_size.
  66   -v, --verbose
  67     Increase level of verbosity. Can be repeated.
  68   -w WIDTH, --wrap WIDTH
  69     Wrap lines to WIDTH length. If "-" is specified, use terminal size.
  70   --version
  71     Print version information.
  72
  73 END
  74         exit 0
  75 fi
  76
  77 if [ "$opt_decode" = "1" ]; then
  78         base64 -di | gunzip --stdout --force
  79         exit
  80 fi
  81
  82 (gzip -9 | base64 -w $opt_size | tr '\n' ' ' | sed 's/ $//'; echo) \
  83 | if [ "$opt_wrap" = "0" ]; then
  84         cat
  85 else
  86         [ "$opt_wrap" = "-" ] && opt_wrap=$(tput cols)
  87         fold -s -w $opt_wrap
  88 fi
  89
  90 # vim: set ts=8 sw=8 sts=8 noet fo+=w tw=79 fenc=UTF-8 :