tools/update-packaging/unwrap_full_update.sh

   1 #!/bin/sh
   2 #
   3 # This tool unpacks a full update package generated by make_full_update.sh
   4 # Author: Darin Fisher
   5 #
   6
   7 # -----------------------------------------------------------------------------
   8 # By default just assume that these tools exist on our path
   9 MAR=${MAR:-mar}
  10 BZIP2=${BZIP2:-bzip2}
  11
  12 # -----------------------------------------------------------------------------
  13 #
  14 print_usage() {
  15   echo "Usage: $(basename $0) [OPTIONS] ARCHIVE"
  16 }
  17
  18 if [ $# = 0 ]; then
  19   print_usage
  20   exit 1
  21 fi
  22
  23 if [ $1 = -h ]; then
  24   print_usage
  25   echo ""
  26   echo "The contents of ARCHIVE will be unpacked into the current directory."
  27   echo ""
  28   echo "Options:"
  29   echo "  -h  show this help text"
  30   echo ""
  31   exit 1
  32 fi
  33
  34 # -----------------------------------------------------------------------------
  35
  36 archive="$1"
  37
  38 # Generate a list of all files in the archive.
  39 files=($($MAR -t "$archive" | cut -d'   ' -f3))
  40
  41 # Extract the files, creating subdirectories.  The resulting files are bzip2
  42 # compressed, so we need to walk the list of files, and decompress them.
  43 $MAR -x "$archive"
  44
  45 num_files=${#files[*]}
  46
  47 # Skip first "file" since it is actually the column header string "NAME" that
  48 # does not correspond to an actual file in the archive.
  49 for ((i=1; $i<$num_files; i=$i+1)); do
  50   eval "f=${files[$i]}"
  51
  52   echo "  decompressing $f"
  53
  54   mv -f "$f" "$f.bz2"
  55   $BZIP2 -d "$f.bz2"
  56 done