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#!/bin/sh

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

set -e

# Run this from /tmp.
SVNROOT=${SVNROOT:-"file:///svn/gcc"}
export SVNROOT

PATH=/usr/local/bin:$PATH

MANUALS="cpp
  cppinternals
  fastjar
  gcc
  gccint
  gcj
  gfortran
  gfc-internals
  gnat_ug_unx
  gnat_ug_vms
  gnat_ug_vxw
  gnat_ug_wnt
  gnat_ugn_unw
  gnat-style
  gnat_rm
  libgomp
  libiberty
  porting"

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=trunk
fi

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

rm -rf $WORKDIR
mkdir $WORKDIR
cd $WORKDIR
if [ "$RELEASE" = "trunk" ]; then
  svn -q export $SVNROOT/$RELEASE gcc
else
  svn -q export $SVNROOT/tags/$RELEASE gcc
fi

# Remove all unwanted files.  This is needed (a) to build the Ada
# generator programs with the installed library, not the new one and
# (b) to avoid packaging all the sources instead of only documentation
# sources.
find gcc -type f \( -name '*.texi' \
  -o -path gcc/gcc/doc/install.texi2html \
  -o -path gcc/gcc/doc/include/texinfo.tex \
  -o -path gcc/gcc/ada/xgnatugn.adb \
  -o -path gcc/gcc/ada/ug_words \
  -o -path gcc/gcc/BASE-VER \
  -o -path gcc/gcc/DEV-PHASE \
  -o -print0 \) | xargs -0 rm -f

# Build a tarball of the sources.
tar cf docs-sources.tar gcc

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

# Generate gnat_ugn_unw

if [ -f gcc/gcc/ada/xgnatugn.adb ]; then
   gnatmake -q gcc/gcc/ada/xgnatugn
   ./xgnatugn unw gcc/gcc/ada/gnat_ugn.texi \
     gcc/gcc/ada/ug_words gnat_ugn_unw.texi
fi

# Generate gcc-vers.texi.
(
   echo "@set version-GCC $(cat gcc/gcc/BASE-VER)"
   if [ "$(cat gcc/gcc/DEV-PHASE)" = "experimental" ]; then
      echo "@set DEVELOPMENT"
   else
      echo "@clear DEVELOPMENT"
   fi
   echo "@set srcdir $WORKDIR/gcc/gcc"
   echo "@set VERSION_PACKAGE (GCC)"
   echo "@set BUGURL @uref{http://gcc.gnu.org/bugs/}"
) > $includedir/gcc-vers.texi

# Now convert the relevant files from texi to HTML, PDF and PostScript.
for file in $MANUALS; do
  filename=`find . -name ${file}.texi`
  if [ "${filename}" ]; then
    makeinfo --html -I ${includedir} -I `dirname ${filename}` -o ${file} ${filename}
    tar cf ${file}-html.tar ${file}/*.html
    texi2dvi -I ${includedir} -o ${file}.dvi ${filename} </dev/null >/dev/null && dvips -o ${file}.ps ${file}.dvi
    texi2pdf -I ${includedir} -o ${file}.pdf ${filename} </dev/null
    mkdir -p $DOCSDIR/$file
  fi
done

# Then build a gzipped copy of each of the resulting .html, .ps and .tar files
for file in */*.html *.ps *.pdf *.tar; 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 -f $DOCSDIR/$m/*.html $DOCSDIR/$m/*.html.gz
  done
fi

# And copy the resulting files to the web server
for file in */*.html *.ps *.pdf *.tar; do
  if [ -f $DOCSDIR/$file ]; then
    cat $DOCSDIR/$file | 
      sed -e '/^<meta name=generator/d' \
          -e '/^%DVIPSSource:/d' > file1
  fi
  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

cd $DOCSDIR

# Finally, generate the installation documentation
if [ "$RELEASE" = "trunk" ]; then
  SOURCEDIR=$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