#!/bin/sh
# Copyright 2006-2019 Free Software Foundation, Inc.
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License,
# or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# Original author: Karl Berry.
# 
# Test texinfo.tex changes by running various manuals through with an
# old version, saving the .ps result from dvips, doing the same with a
# new version, and comparing.  Idea from Stepan Kasal.
# 
# Another option is to run the manuals all the way through using
# texi2dvi, which tests in another way.

tsrc=`cd \`dirname $0\` && pwd`/../..
PATH=$tsrc/util:$PATH

tdoc=$tsrc/doc
default_manuals="$tdoc/texinfo.texi $tdoc/info.texi $tdoc/info-stnd.texi"

olddir=$tsrc/../gnulib/config
newdir=$tdoc
tempdir=$tsrc/@tests/test
full=false
manuals=

while test $# -gt 0; do
  case $1 in
  --f*) full=true;;
  --o*) shift; olddir="$1";;
  --n*) shift; newdir="$1";;
  --t*) shift; tempdir="$1";;
  -*) echo "$0: unknown option \`$1'." >&2; exit 1;;
  *) manuals="$manuals $1";;
  esac
  shift
done

test -z "$manuals" && manuals=$default_manuals
initial_dir=`pwd`

cd $tempdir || exit 1
rm -f *

run_tex() \
{
  TEXINPUTS=.:$mandir: tex $manual \
  || { echo "$0: tex $manual failed." >&2; exit 1; }
}

for manual in $manuals; do
  mandir=`dirname $manual`
  test $mandir = . && mandir=$initial_dir
  manual_base=`basename "$manual" | sed 's/\.[^.]*$//'`
  
  rm -rf $manual_base.* texinfo.tex
  ln -s $newdir/texinfo.tex texinfo.tex

  if $full; then
    # instead of comparing, do full test of just the new texinfo.tex.
    echo "$0: testing $manual_base... (tex)"
    texi2dvi $manual || { echo "texi2dvi $manual failed." >&2; exit 1; }
    echo "$0: testing $manual_base... (pdf)"
    texi2dvi --pdf $manual \
    || { echo "texi2dvi --pdf $manual failed." >&2; exit 1; }
   
  else
    echo "$0: testing $manual_base... (new)"
    run_tex
    dvips $manual_base -o || exit 1
    mv $manual_base.ps new.$manual_base.ps

    echo "$0: testing $manual_base... (old)"
    rm -rf $manual_base.* texinfo.tex
    ln -s $olddir/texinfo.tex texinfo.tex
    run_tex
    dvips $manual_base -o || exit 1
    mv $manual_base.ps old.$manual_base.ps

    diff -U0 old.$manual_base.ps new.$manual_base.ps
  fi
done