#!/usr/bin/env bash
#
# make_mlyacclib - Generates Isabelle-friendly version of ML-Yacc's library.
#
# This code is based on that used in src/Tools/Metis to adapt Metis for
# use in Isabelle.

MLYACCDIR=./ml-yacc
MLYACCLIB_FILES="base.sig join.sml lrtable.sml stream.sml parser2.sml"

echo "Cleaning"
rm -f ml_yacc_lib.ML
echo "Generating ml_yacc_lib.ML"
(
  cat <<EOF

(******************************************************************)
(* GENERATED FILE -- DO NOT EDIT -- GENERATED FILE -- DO NOT EDIT *)
(* GENERATED FILE -- DO NOT EDIT -- GENERATED FILE -- DO NOT EDIT *)
(* GENERATED FILE -- DO NOT EDIT -- GENERATED FILE -- DO NOT EDIT *)
(******************************************************************)

(*
  This file is generated from the contents of ML-Yacc's lib directory.
  ML-Yacc's COPYRIGHT-file contents follow:

EOF
  perl -pe 'print "  ";' ml-yacc/COPYRIGHT
  echo "*)"

for FILE in $MLYACCLIB_FILES
do
  echo
  echo "(**** Original file: $FILE ****)"
  echo
  echo -e "  $FILE" >&2
  perl -p -e 's/\bref\b/Unsynchronized.ref/g;' \
          -e 's/Unsafe\.(.*)/\1/g;' \
          -e 's/\bconcat\b/String.concat/g;' \
          -e 's/(?<!List\.)foldr\b/List.foldr/g;' \
          -e 's/\bfoldl\b/List.foldl/g;' \
          -e 's/val print = fn s => TextIO\.output\(TextIO\.stdOut,s\)$//g;' \
          -e 's/\bprint\b/TextIO.print/g;' \
          $MLYACCDIR/lib/$FILE
  done

  cat <<EOF
;
EOF

) | expand -t8 > ml_yacc_lib.ML