sim/common/lineno.sh

   1 #!/bin/sh
   2 # Replace $LINENO on the fly.
   3 # Copyright (C) 2023 Free Software Foundation, Inc.
   4 #
   5 # This file is part of the GNU simulators.
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 3 of the License, or
  10 # (at your option) any later version.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 # Since $LINENO is not reliable in shells/subshells, generate it on the fly.
  21
  22 if [ $# -lt 2 ]; then
  23   cat <<EOF >&2
  24 Usage: $0 <script> <tempfile> [script args]
  25
  26 Rewrite the $LINENO usage in <script> with the line number.  The temp script is
  27 written to <tempfile>, and then removed when done.
  28 EOF
  29   exit 1
  30 fi
  31
  32 input=$1
  33 shift
  34 output=$1
  35 shift
  36
  37 ${AWK:-awk} '{
  38   gsub("[$]LINENO", NR + 1)
  39   gsub("\"[$]0\"", "\"" FILENAME "\"")
  40   print
  41 }' "${input}" >"${output}"
  42 ${SHELL} "${output}" "$@"
  43
  44 rm -f "${output}"