#!/bin/bash

# Runs doxygen and massages the output files.
# Copyright (C) 2001, 2002, 2003, 2004, 2008, 2009 
# Free Software Foundation, Inc.
#
# Synopsis:  run_doxygen --mode=[html|man|xml] --host_alias=<alias> \
#                        v3srcdir  v3builddir
#
# Originally hacked together by Phil Edwards <pme@gcc.gnu.org>


# We can check now that the version of doxygen is >= this variable.
DOXYVER=1.5.1

find_doxygen() {
    local -r v_required=`echo $DOXYVER |  \
                awk -F. '{if(NF<3)$3=0;print ($1*100+$2)*100+$3}'`
    local testing_version doxygen maybedoxy v_found
    # thank you goat book
    set `IFS=:; X="$PATH:/usr/local/bin:/bin:/usr/bin"; echo $X`
    for dir
    do
      # AC_EXEEXT could come in useful here
      maybedoxy="$dir/doxygen"
      test -f "$maybedoxy" && testing_version=`$maybedoxy --version`
      if test -n "$testing_version"; then
       v_found=`echo $testing_version |  \
                awk -F. '{if(NF<3)$3=0;print ($1*100+$2)*100+$3}'`
       if test $v_found -ge $v_required; then
         doxygen="$maybedoxy"
         break
       fi
      fi
    done
    if test -z "$doxygen"; then
        echo run_doxygen error:  Could not find Doxygen $DOXYVER in path. 1>&2
        print_usage
    fi
    # We need to use other tools from the same package/version.
    echo :: Using Doxygen tools from ${dir}.
    PATH=$dir:$PATH
    hash -r
}

print_usage() {
    cat 1>&2 <<EOF
Usage:  run_doxygen --mode=MODE --host_alias=BUILD_ALIAS [<options>]
                    <v3-src-dir> <v3-build-dir>
      MODE is one of:
          html           Generate user-level HTML library documentation.
          man            Generate user-level man pages.
          xml            Generate user-level XML pages.

      BUILD_ALIAS is the GCC build alias set at configure time.

Note:  Requires Doxygen ${DOXYVER} or later; get it at
       ftp://ftp.stack.nl/pub/users/dimitri/doxygen-${DOXYVER}.src.tar.gz

EOF
    exit 1
}

parse_options() {
  for o
  do
    # Blatantly ripped from autoconf, er, I mean, "gratefully standing
    # on the shoulders of those giants who have gone before us."
    case "$o" in
      -*=*) arg=`echo "$o" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
      *) arg= ;;
    esac

    case "$o" in
      --mode=*)
        mode=$arg ;;
      --host_alias=*)
        host_alias=$arg ;;
      --mode | --host_alias | --help | -h)
        print_usage ;;
      *)
        # this turned out to be a mess, maybe change to --srcdir=, etc
        if test $srcdir = unset; then
          srcdir=$o
        elif test $outdir = unset; then
          builddir=${o}
          outdir=${o}/doc/doxygen
        else
          echo run_doxygen error:  Too many arguments 1>&2
          exit 1
        fi
        ;;
      esac
  done
}


# script begins here
mode=unset
host_alias=unset
srcdir=unset
outdir=unset
do_html=false
do_man=false 
do_xml=false 
enabled_sections=
generate_tagfile=
DATEtext=`date '+%Y-%m-%d'`

# Show how this script is called.
echo run_doxygen $*

parse_options $*
find_doxygen

if test $srcdir = unset || test $outdir = unset || test $mode = unset || test $host_alias = unset; then
    # this could be better
    echo run_doxygen error:  You have not given enough information...! 1>&2
    print_usage
fi

case x"$mode" in
    xhtml)
      do_html=true
      enabled_sections=maint
      generate_tagfile="$outdir/html/libstdc++.tag"
      ;;
    xman)
      do_man=true
      ;;
    xxml)
      do_xml=true
      enabled_sections=maint
      ;;
    *)
      echo run_doxygen error:  $mode is an invalid mode 1>&2
      exit 1 ;;
esac

mkdir -p $outdir
chmod u+w $outdir

# work around a stupid doxygen bug
if $do_man; then
    mkdir -p $outdir/man/man3/ext
    chmod -R u+w $outdir/man/man3/ext
fi

if $do_xml; then
    mkdir -p $outdir/xml
fi

(
  set -e
  cd $builddir
  sed -e "s=@outdir@=${outdir}=g" \
      -e "s=@srcdir@=${srcdir}=g" \
      -e "s=@builddir@=${builddir}=g" \
      -e "s=@host_alias@=${host_alias}=g" \
      -e "s=@enabled_sections@=${enabled_sections}=" \
      -e "s=@do_html@=${do_html}=" \
      -e "s=@do_man@=${do_man}=" \
     -e "s=@do_xml@=${do_xml}=" \
      -e "s=@generate_tagfile@=${generate_tagfile}=" \
      ${srcdir}/doc/doxygen/user.cfg.in > ${outdir}/${mode}.cfg
  echo :: NOTE that this may take some time...
  echo doxygen ${outdir}/${mode}.cfg
  doxygen ${outdir}/${mode}.cfg
  echo :: Finished, exit code was $?
)
ret=$?
test $ret -ne 0 && exit $ret

if $do_html; then
  cd ${outdir}/html

  #doxytag -t libstdc++.tag . > /dev/null 2>&1
  sed -e '/<path>/d' libstdc++.tag > TEMP
  mv TEMP libstdc++.tag

  sed -e "s=@DATE@=${DATEtext}=" \
      ${srcdir}/doc/doxygen/mainpage.html > index.html

  # The following bit of line noise changes annoying
  #   std::foo < typename _Ugly1, typename _Ugly2, .... _DefaultUgly17 >
  # to user-friendly
  #   std::foo
  # in the major "Compound List" page.
  sed -e 's=\(::[[:alnum:]_]*\)&lt; .* &gt;=\1=' annotated.html > annstrip.html
  mv annstrip.html annotated.html

  # Work around a bug in doxygen 1.3.
#  for f in class*html struct*html; do
  for f in class*html; do
      sed '1,10s!^<title> Template!<title>Template !' $f > TEMP
      mv TEMP $f
  done

  cp ${srcdir}/doc/doxygen/tables.html tables.html
  echo ::
  echo :: HTML pages begin with
  echo :: ${outdir}/html/index.html
fi

# Mess with the man pages.  We don't need documentation of the internal
# headers, since the man pages for those contain nothing useful anyhow.  The
# man pages for doxygen modules need to be renamed (or deleted).  And the
# generated #include lines need to be changed from the internal names to the
# standard ones (e.g., "#include <stl_tempbuf.h>" -> "#include <memory>").
if $do_man; then
echo ::
echo :: Fixing up the man pages...
cd $outdir/man/man3

# here's the other end of the "stupid doxygen bug" mentioned above
rm -rf ext

# File names with embedded spaces (EVIL!) need to be....?  renamed or removed?
find . -name "* *" -print0 | xargs -0r rm        # requires GNU tools

# Cleanups before tr1* files get killed.
mv tr1_random_distributions.3 random_distributions.3
mv tr1_random_distributions_continuous.3 random_distributions_continuous.3
mv tr1_random_distributions_discrete.3 random_distributions_discrete.3
mv tr1_random_generators.3 random_generators.3

# man pages are for functions/types/other entities, not source files
# directly.  who the heck would type "man foo.h" anyhow?
find . -name "[a-z]*" -a ! -name "std_*" -print | xargs rm
rm -f *.h.3 *.hpp.3 *config* *.cc.3 *.tcc.3 *_t.3
#rm ext_*.3 tr1_*.3 debug_*.3

# this is used to examine what we would have deleted, for debugging
#mkdir trash
#find . -name "[a-z]*" -a ! -name "std_*" -print | xargs -i mv {} trash
#mv *.h.3 *config* *.cc.3 *.tcc.3 *_t.3  trash

# Standardize the displayed header names.  If anyone who knows perl cares
# enough to rewrite all this, feel free.  This only gets run once a century,
# and I'm off getting coffee then anyhow, so I didn't care enough to make
# this super-fast.
g++ ${srcdir}/doc/doxygen/stdheader.cc -o ./stdheader
problematic=`egrep -l '#include <.*_.*>' [a-z]*.3`
for f in $problematic; do
    # this is also slow, but safe and easy to debug
    oldh=`sed -n '/fC#include </s/.*<\(.*\)>.*/\1/p' $f`
    newh=`echo $oldh | ./stdheader`
    sed "s=${oldh}=${newh}=" $f > TEMP
    mv TEMP $f
done
rm stdheader

# Some of the pages for generated modules have text that confuses certain
# implementations of man(1), e.g., Linux's.  We need to have another top-level
# *roff tag to /stop/ the .SH NAME entry.
problematic=`egrep --files-without-match '^\.SH SYNOPSIS' [A-Z]*.3`
#problematic='Containers.3 Sequences.3 Assoc_containers.3 Iterator_types.3'

for f in $problematic; do
    sed '/^\.SH NAME/{
n
a\
\
.SH SYNOPSIS
    }' $f > TEMP
    mv TEMP $f
done

# Also, break this (generated) line up.  It's ugly as sin.
problematic=`grep -l '[^^]Definition at line' *.3`
for f in $problematic; do
    sed 's/Definition at line/\
.PP\
&/'  $f > TEMP
    mv TEMP $f
done

cp ${srcdir}/doc/doxygen/Intro.3 C++Intro.3

# Why didn't I do this at the start?  Were rabid weasels eating my brain?
# Who the fsck would "man std_vector" when the class isn't named that?

# First, deal with nested namespaces.
for f in *__detail_*; do
    newname=`echo $f | sed 's/__detail_/__detail::/'`
    mv $f $newname
done
for f in *__parallel_*; do
    newname=`echo $f | sed 's/__parallel_/__parallel::/'`
    mv $f $newname
done

# Then, clean up other top-level namespaces.
for f in std_tr1_*; do
    newname=`echo $f | sed 's/^std_tr1_/std::tr1::/'`
    mv $f $newname
done
for f in std_*; do
    newname=`echo $f | sed 's/^std_/std::/'`
    mv $f $newname
done
for f in __gnu_cxx_*; do
    newname=`echo $f | sed 's/^__gnu_cxx_/__gnu_cxx::/'`
    mv $f $newname
done
for f in __gnu_debug_*; do
    newname=`echo $f | sed 's/^__gnu_debug_/__gnu_debug::/'`
    mv $f $newname
done
for f in __gnu_parallel_*; do
    newname=`echo $f | sed 's/^__gnu_parallel_/__gnu_parallel::/'`
    mv $f $newname
done
for f in __atomic0_*; do
    newname=`echo $f | sed 's/^__atomic0_/std::__atomic0::/'`
    mv $f $newname
done
for f in __atomic2_*; do
    newname=`echo $f | sed 's/^__atomic2_/std::__atomic2::/'`
    mv $f $newname
done
for f in __cxxabiv1_*; do
    newname=`echo $f | sed 's/^__cxxabiv1_/abi::/'`
    mv $f $newname
done

# Generic removal bits, where there are things in the generated man
# pages that need to be killed.
for f in *_libstdc__-v3_*; do
    rm $f 
done

for f in *_src_*; do
    rm $f 
done


# Also, for some reason, typedefs don't get their own man pages.  Sigh.
for f in ios streambuf istream ostream iostream stringbuf \
         istringstream ostringstream stringstream filebuf ifstream \
         ofstream fstream string;
do
    echo ".so man3/std::basic_${f}.3" > std::${f}.3
    echo ".so man3/std::basic_${f}.3" > std::w${f}.3
done

echo ::
echo :: Man pages in ${outdir}/man
fi

# all done
echo ::

exit 0