shar.sh

   1 #!/bin/sh
   2 # Modified version of https://shiz.me/junk/code/fun/shar.sh
   3 # The generated shell archive is automatically extracted to a
   4 # temporary directory and the first archive member is executed.
   5 set -e
   6
   7 if test $# -lt 2 ; then
   8         echo "usage: $0 <output> <files>"
   9         exit 1
  10 fi
  11
  12 save() {
  13         for i ; do
  14                 printf "%s\n" "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/"
  15         done
  16         echo " "
  17 }
  18
  19 octal_mode() {
  20         local mode
  21
  22         mode="$(ls -ld "$1" | awk '{ print $1 }' | tr '[A-Z]' '-' | cut -c2-)"
  23         for i in 1 2 3 ; do
  24                 i=0
  25                 case "$mode" in r??*) i=$((i + 4)) ;; esac
  26                 case "$mode" in ?w?*) i=$((i + 2)) ;; esac
  27                 case "$mode" in ??-*) ;; ???*) i=$((i + 1)) ;; esac
  28                 printf "%d" "$i"
  29                 mode=$(echo "$mode" | cut -c4-)
  30         done
  31 }
  32
  33 out=$1
  34 tmpout=$1.tmp
  35 exe=$2
  36 shift
  37
  38 rm -f "$tmpout"
  39 for f ; do
  40         if test -f "$f" ; then
  41                 cat "$f" >> "$tmpout"
  42         fi
  43 done
  44 trap 'rm "$tmpout"' EXIT
  45
  46 clear=
  47
  48 for f ; do
  49         if test -z "$clear" ; then
  50                 set --
  51                 clear=1
  52         fi
  53
  54         mode=$(octal_mode "$f")
  55         if test -f "$f" ; then
  56                 size=$(wc -c "$f" | awk '{ print $1 }')
  57                 echo "adding: $f (mode $mode, $size bytes)"
  58                 set -- "$@" "f+$mode+$size:$f"
  59         elif test -d "$f" ; then
  60                 echo "adding directory: $f (mode $mode)"
  61                 set -- "$@" "d+$mode:$f"
  62         else
  63                 echo "can't add unknown file type $f" >&2
  64         fi
  65 done
  66
  67 cat >"$out"<<HEADER
  68 #!/bin/sh
  69 set -e
  70
  71 outdir="\$(mktemp -d -p "\${TMPDIR:-/tmp}" .unshar-XXXXXX)"
  72 if test \$? -ne 0 -o ! -d "\$outdir" ; then
  73         echo "failed to create temporary directory"
  74         exit 1
  75 fi
  76 trap 'rm -rf "\$outdir"' EXIT INT QUIT TERM HUP
  77 argc=\$#
  78
  79 self="\$0"
  80 set -- $(save "$@") "\$@"
  81
  82 exec 3<"\$self"
  83 while read -r l ; do
  84         test "\$l" = "exit 0;" && break
  85 done <&3
  86
  87 while test \$# -gt \$argc ; do
  88         file="\$1"
  89         shift
  90         meta="\${file%%:*}"
  91         fn="\${file#*:}"
  92         type="\${meta%%+*}"
  93         meta="\${meta#*+}"
  94         mode="\${meta%%+*}"
  95         size="\${meta#*+}"
  96         base="\${fn%/*}"
  97
  98         case "\$type" in
  99         f)
 100                 echo "unpacking: \$fn (mode \$mode, \$size bytes)"
 101                 test "\$base" != "\$fn" && mkdir -p "\$outdir/\$base"
 102                 dd of="\$outdir/\$fn" bs="\$size" count=1 >/dev/null <&3
 103                 ;;
 104         d)
 105                 echo "creating: \$fn (mode \$mode)"
 106                 mkdir -p "\$outdir/\$fn"
 107                 ;;
 108         esac
 109         chmod "\$mode" "\$outdir/\$fn" || :
 110 done >/dev/null 2>&1
 111
 112 PATH="\$outdir:\$PATH" "\$outdir/$exe" "\$@"
 113 exit \$?
 114
 115 exit 0;
 116 HEADER
 117
 118 cat "$tmpout" >> "$out"
 119 chmod +x "$out"
 120