util/install-symlink.in

   1 #!/bin/sh
   2 #
   3 # install-symlink source destination destdir
   4 #
   5
   6 SYMLINKS=symlinks
   7 LN_S="@LN_S@"
   8 RM="@RM@"
   9 FORCE_RELATIVE=NO
  10 FORCE_ABSOLUTE=NO
  11
  12 while echo $1 | grep -q -- ^- ;
  13 do
  14         case $1 in
  15                 --relative)
  16                         FORCE_RELATIVE=YES
  17                         ;;
  18                 --absolute)
  19                         FORCE_ABSOLUTE=YES
  20                         ;;
  21                 --debian)
  22                         FORCE_ABSOLUTE=NO
  23                         FORCE_RELATIVE=NO
  24                         ;;
  25                 --symlinks=*)
  26                         SYMLINKS=$(echo $1 | sed -e 's/--symlinks=//')
  27                         ;;
  28                 *)
  29                         echo "Unknown option $1"
  30                         exit 1
  31                         ;;
  32         esac
  33         shift;
  34 done
  35
  36
  37 FIX_SYMLINK="$SYMLINKS -c"
  38
  39 SRC="$1"
  40 DEST="$2"
  41 DESTDIR="$3"
  42
  43 if ! echo $SRC | grep -q ^/ ; then
  44         echo $SRC: Source pathname must be absolute
  45         exit 1
  46 fi
  47
  48 if ! echo $DEST | grep -q ^/ ; then
  49         echo $DEST: Destination pathname must be absolute
  50         exit 1
  51 fi
  52
  53 if ! test -e "$DESTDIR$SRC" ; then
  54         echo $DESTDIR$SRC: file or directory does not exist
  55         exit 1
  56 fi
  57
  58 $RM -f "$DESTDIR$DEST"
  59
  60 if test "$LN_S" != "ln -s" ; then
  61         $LN_S "$DESTDIR$SRC" "$DESTDIR$DEST"
  62         exit 0
  63 fi
  64
  65 if test $(dirname "$SRC") = $(dirname "$DEST") ; then
  66         $LN_S "$(basename "$SRC")" "$DESTDIR$DEST"
  67         exit 0
  68 fi
  69
  70 TOP_SRC=$(echo $SRC | awk -F/ '{print $2}')
  71 TOP_DEST=$(echo $DEST | awk -F/ '{print $2}')
  72
  73 if test $FORCE_RELATIVE = YES ; then
  74         TOP_SRC=FORCE
  75         TOP_DEST=FORCE
  76 fi
  77
  78 if test $FORCE_ABSOLUTE = YES ; then
  79         TOP_SRC=FORCE
  80         TOP_DEST=FORCE_ABSOLUTE
  81 fi
  82
  83 if test $TOP_SRC != $TOP_DEST ; then
  84         $LN_S "$SRC" "$DESTDIR$DEST"
  85 else
  86         $LN_S "$DESTDIR$SRC" "$DESTDIR$DEST"
  87         $FIX_SYMLINK "$DESTDIR$DEST"
  88 fi
  89