#!/bin/sh
# Copyright (c) 2013,2014,2015,2017,2018 Ingo Schwarze <schwarze@openbsd.org>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

if [ `id -u` -eq 0 ]; then
  echo "$0: do not run me as root"
  exit 1
fi

if [ $# -eq 0 ]; then
  echo "usage: $0 [-h|-u] manual_source_file ..."
  exit 1
fi

if [ "X$1" = "X-h" ]; then
  shift
  export PATH="/usr/local/heirloom-doctools/bin:$PATH"
  EQN="neqn"
  ROFF="nroff"
  MOPT="-Ios=BSD -Tascii $MOPT"
  COLPIPE="col -b"
elif [ "X$1" = "X-u" ]; then
  shift
  ROFF="groff -ket -ww -Tutf8 -P -c"
  MOPT="-Ios=OpenBSD -Wall -Tutf8 $MOPT"
  COLPIPE="cat"
else
  ROFF="groff -ket -ww -mtty-char -Tascii -P -c"
  MOPT="-Ios=OpenBSD -Wall -Tascii $MOPT"
  COLPIPE="cat"
fi

while [ -n "$1" ]; do
  file=$1
  shift
  echo " ========== $file ========== "
  $ROFF -mandoc $file | $COLPIPE 2> /tmp/roff.err > /tmp/roff.out
  ${MANDOC:=mandoc} $MOPT $file | $COLPIPE \
    2> /tmp/mandoc.err > /tmp/mandoc.out
  for i in roff mandoc; do
    [ -s /tmp/$i.err ] && echo "$i errors:" && cat /tmp/$i.err
  done
  diff -au $DIFFOPT /tmp/roff.out /tmp/mandoc.out 2>&1
done

exit 0