mdw@git.distorted.org.uk Git - distorted-bits/blob - expand-list

   1 #! /bin/sh
   2 ###
   3 ### Expand a list of symbolic references to other lists.
   4
   5 expand () {
   6   slaves=""
   7   for i in "$@"; do
   8     case "$i" in
   9       :*)
  10         name=${i#:}
  11         eval found=\${set_$name+t}\${set_$name-nil} set=\${set_$name}
  12         case "$found" in
  13           nil) echo >&2 "$0: no such set \`$name'"; exit 1 ;;
  14         esac
  15         slaves="$slaves $set"
  16         ;;
  17       *)
  18         slaves="$slaves $i"
  19         ;;
  20     esac
  21   done
  22   echo $slaves
  23 }
  24
  25 defset () {
  26   setname=$1; shift
  27   eval set_$setname='$(expand "$@")'
  28 }
  29
  30 case $# in
  31   0 | 1)
  32     echo >&2 "Usage: $0 FILE ITEM|:LIST ..."
  33     exit 1
  34     ;;
  35 esac
  36
  37 . "$1"; shift
  38 expand "$@"
  39