common/environment/setup/vsed.sh

   1 # Helper function for calling sed on files and checking if the
   2 # file is actually changed
   3 #
   4 # NOTE: this will not check if the input is valid, you can problably
   5 # make it execute arbirtrary commands via passing '; cmd' to a vsed
   6 # call.
   7
   8 vsed() {
   9         local files=() regexes=() OPTIND OPTSTRING="ie:" has_inline=
  10
  11         eval set -- "$(getopt -s bash "$OPTSTRING" "$@")";
  12
  13         while getopts "$OPTSTRING" opt; do
  14                 case $opt in
  15                         i) has_inline=1 ;;
  16                         e) regexes+=("$OPTARG") ;;
  17                         *) ;;
  18                 esac
  19         done
  20
  21         if ! [ "$has_inline" ]; then
  22                 msg_red "$pkgver: vsed: you must specify -i.\n"
  23                 return 1
  24         fi
  25
  26         shift $(($OPTIND - 1))
  27
  28         if [ ${#regexes[@]} -eq 0 ] && [ $# -ge 2 ]; then
  29                 regexes+=("$1")
  30                 shift
  31         fi
  32
  33         if [ ${#regexes[@]} -eq 0 ]; then
  34                 msg_red "$pkgver: vsed: no regexes specified.\n"
  35                 return 1
  36         fi
  37
  38         for i; do
  39                 files+=("$i")
  40         done
  41
  42         if [ ${#files[@]} -eq 0 ]; then
  43                 msg_red "$pkgver: vsed: no files specified.\n"
  44                 return 1
  45         fi
  46
  47         for f in "${files[@]}"; do
  48                 olddigest="$($XBPS_DIGEST_CMD "$f")"
  49                 olddigest="${olddigest%% *}"
  50
  51                 for rx in "${regexes[@]}"; do
  52                         sed -i "$f" -e "$rx" || {
  53                                 msg_red "$pkgver: vsed: sed call failed with regex \"$rx\" on file \"$f\"\n"
  54                                 return 1
  55                         }
  56
  57                         newdigest="$($XBPS_DIGEST_CMD "$f")"
  58                         newdigest="${newdigest%% *}"
  59
  60                         msgfunc=msg_warn
  61                         if [ -n "$XBPS_STRICT" ]; then
  62                                 msgfunc=msg_error
  63                         fi
  64
  65                         if [ "$olddigest" = "$newdigest" ]; then
  66                                 $msgfunc "$pkgver: vsed: regex \"$rx\" didn't change file \"$f\"\n"
  67                         fi
  68                         olddigest="${newdigest}"
  69                 done
  70         done
  71 }