#!/bin/sh -x

# Generate HTML documentation from GCC Texinfo docs.
# This version is for GCC 3.1 and later versions.

# Run this from /tmp.
CVSROOT=/cvs/gcc
export CVSROOT

PATH=/usr/local/bin:$PATH

WWWBASE=/www/gcc/htdocs
WWWBASE_PREFORMATTED=/www/gcc/htdocs-preformatted
WWWPREPROCESS='/www/gcc/bin/preprocess -r'

# Process options -rrelease and -ddirectory
RELEASE=""
SUBDIR=""

while [ $# -gt 0 ]; do
  case $1 in
    -r*)
      if [ -n "$RELEASE" ]; then
        echo "Multiple releases specified" >&2
	exit 1
      fi
      RELEASE="${1#-r}"
      if [ -z "$RELEASE" ]; then
	shift
	RELEASE="$1"
	if [ -z "$RELEASE" ]; then
	  echo "No release specified with -r" >&2
	  exit 1
	fi
      fi
      ;;
    -d*)
      if [ -n "$SUBDIR" ]; then
        echo "Multiple subdirectories specified" >&2
	exit 1
      fi
      SUBDIR="${1#-d}"
      if [ -z "$SUBDIR" ]; then
	shift
	SUBDIR="$1"
	if [ -z "$SUBDIR" ]; then
	  echo "No subdirectory specified with -d" >&2
	  exit 1
	fi
      fi
      ;;
    *)
      echo "Unknown argument \"$1\"" >&2
      exit 1
      ;;
  esac
  shift
done

if [ -n "$RELEASE" ] && [ -z "$SUBDIR" ]; then
  echo "Release specified without subdirectory" >&2
  exit 1
fi

if [ -z "$SUBDIR" ]; then
  DOCSDIR=$WWWBASE/onlinedocs
else
  DOCSDIR=$WWWBASE/onlinedocs/$SUBDIR
fi

if [ ! -d $DOCSDIR ]; then
  mkdir $DOCSDIR
fi

if [ -z "$RELEASE" ]; then
  RELEASE=HEAD
fi

WORKDIR=/tmp/gcc-doc-update.$$

/bin/rm -rf $WORKDIR
/bin/mkdir $WORKDIR
cd $WORKDIR

# Find all the texi files in the repository, except those in directories
# we do not care about (texinfo, etc).
find $CVSROOT/gcc -name \*.texi,v -print | fgrep -v -f/home/gccadmin/scripts/doc_exclude | sed -e s#$CVSROOT/##g -e s#,v##g -e s#Attic/##g > FILES


# Checkout all the texi files.
cvs -Q co -r$RELEASE `cat FILES` gcc/gcc/doc/install.texi2html gcc/gcc/doc/include/texinfo.tex

# The directory to pass to -I; this is the one with texinfo.tex
# and fdl.texi.
includedir=gcc/gcc/doc/include

MANUALS="cpp cppinternals gcc gccint gcj g77 gnat-style gnat_rm libiberty porting"

# Now convert the relevant files from texi to HTML and PostScript.
for file in $MANUALS; do
  filename=`find . -name ${file}.texi`
  if [ "${filename}" ]; then
    makeinfo --html -I ${includedir} -I `dirname ${filename}` ${filename}
    texi2dvi -I ${includedir} ${filename} </dev/null && dvips -o ${file}.ps ${file}.dvi
    mkdir -p $DOCSDIR/$file
  fi
done

# Then build a gzipped copy of each of the resulting .html and .ps files
for file in */*.html *.ps; do
  cat $file | gzip --best > $file.gz
done

# On the 15th of the month, wipe all the old files from the
# web server.
today=`date +%d`
if test $today = 15; then
  find $DOCSDIR -type f -maxdepth 1 -print | grep -v index.html | xargs rm
  for m in $MANUALS; do
    rm $DOCSDIR/$m/*.html
  done
fi

# And copy the resulting html files to the web server
for file in */*.html *.ps; do
  cat $DOCSDIR/$file | 
    sed -e '/^<meta name=generator/d' \
        -e '/^%DVIPSSource:/d' > file1
  cat $file |
    sed -e '/^<meta name=generator/d' \
        -e '/^%DVIPSSource:/d' > file2
  if cmp -s file1 file2; then
    :
  else
    cp $file $DOCSDIR/$file
    cp $file.gz $DOCSDIR/$file.gz
  fi
done

news_file=g77/News.html
bugs_file=g77/Trouble.html

cd $DOCSDIR

rm -f g77_news.html
rm -f g77_bugs.html
rm -f g77_news.html.gz
rm -f g77_bugs.html.gz
ln $news_file g77_news.html
ln $bugs_file g77_bugs.html
ln ${news_file}.gz g77_news.html.gz
ln ${bugs_file}.gz g77_bugs.html.gz

# Finally, generate the installation documentation (but only for CVS HEAD).
if [ "$RELEASE" = "HEAD" ]; then
  SOURCEDIR=$WORKDIR/gcc/gcc/doc
  DESTDIR=$WWWBASE_PREFORMATTED/install
  export SOURCEDIR
  export DESTDIR
  $WORKDIR/gcc/gcc/doc/install.texi2html

  # Preprocess the entire web site, not just the install docs!
  echo "Invoking $WWWPREPROCESS"
  $WWWPREPROCESS |grep -v '^  Warning: Keeping'
fi

# Clean up behind us.

rm -rf $WORKDIR