buildroot/_pkg/_remove_targz2

   1 #! /bin/bash
   2
   3 export LC_COLLATE=C
   4 #get params: / targz / targz --root / targz --root dir /
   5 [ -z "$1" ] && exit 1
   6
   7 ROOT=
   8 [ "$2" = "--root" ] && ROOT=/
   9 [ ! -z "$3" ] && ROOT="$3"
  10 [ -z "$ROOT" ] && ROOT="."
  11
  12 [ ! -d "$ROOT" ] && echo "No such directory" && exit 1
  13
  14 OPWD=`pwd -P`
  15 cd "$ROOT"
  16 [ "$?" != 0 ] && echo "Cannot change to directory" && exit 1
  17 ROOT=`pwd -P`
  18 cd "$OPWD"
  19 [ "$?" != 0 ] && echo "Cannot change to original directory" && exit 1
  20
  21 #setup tempfiles
  22 tempfile1=`mktemp --suffix=-tmp1 2> /dev/null`
  23 tempfile2=`mktemp --suffix=-tmp2 2> /dev/null`
  24 tempfile3=`mktemp --suffix=-tmp3 2> /dev/null`
  25 trap "rm -f $tempfile1 $tempfile2 $tempfile3" 0 1 2 5 15
  26
  27 #remove multiple slashes and slash from the end (to zero if ROOT=/)
  28 ROOT=`echo -n "$ROOT" | sed -e 's%/\+$%%' -e 's%/\+%/%g'`
  29
  30 #cat list of directories to keep
  31 [ -d "$ROOT"/var/lib/instpkg/local ] && removedb=1
  32 keepdirs=`cat "$ROOT"/var/lib/instpkg/local/*/keepdirs 2> /dev/null | cut -d ' ' -f 4-`
  33 #put root to prefix
  34 [ ! -z "$keepdirs" ] && keepdirs=`echo "$keepdirs" | sed "s%.*%$ROOT/&/%"`
  35
  36 #list tar and add root dir and grep dirs
  37 tar tzf "$1" | sed "s%.*%$ROOT/&%" | tee $tempfile1 | grep "/$" > $tempfile2
  38
  39 #grep files or links
  40 grep -v "/$" $tempfile1 > $tempfile3
  41
  42 #rm files or links
  43 cat $tempfile3 | tr '\n' '\0' | xargs -0 -r rm 2> /dev/null
  44
  45 #rm dirs
  46 if [ "$removedb" = 1 ]; then
  47     tac $tempfile2 | grep -vFx "$keepdirs" | tr '\n' '\0' | xargs -0 -r rmdir 2> /dev/null
  48 else
  49     tac $tempfile2 | tr '\n' '\0' | xargs -0 -r rmdir 2> /dev/null
  50 fi