#!/bin/sh

# Runs doxygen and massages the output files.
#
# Synopsis:  run_doxygen --mode=[user|maint]  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=1.2.10
doxygen=

find_doxygen() {
    v_required=`echo $DOXYVER |  \
                awk -F. '{if(NF<3)$3=0;print ($1*100+$2)*100+$3}'`
    testing_version=
    # thank you goat book
    set `IFS=:; X="$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
}

print_usage() {
    cat 1>&2 <<EOF
Usage:  run_doxygen --mode=MODE [<options>] <src-dir> <output-dir>
      MODE is one of:
          maint          Generate maintainers' documentation (lots more;
                             exposes non-public members, etc).
          user           Generate user-level library documentation.

      more options when i think of them

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 ;;
      --mode | --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 $outdir = unset; then
          outdir=${o}/docs/doxygen
        else
          echo run_doxygen error:  Too many arguments 1>&2
          exit 1
        fi
        ;;
      esac
  done
}


# script begins here
mode=unset
srcdir=unset
outdir=unset

parse_options $*
find_doxygen

if test $srcdir = unset || test $outdir = unset || test $mode = 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
    xuser | xmaint)  ;;  # ochen khorosho
    *)
      echo run_doxygen error:  $mode is an invalid mode 1>&2
      exit 1 ;;
esac

rm -rf $outdir
mkdir -p $outdir
chmod u+w $outdir
(
  set -e
  cd $srcdir
  sed -e "s=@outdir@=${outdir}=" \
      -e "s=@srcdir@=${srcdir}=" \
      docs/doxygen/${mode}.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 $?
)

# 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>").
cd $outdir/man/man3 && {
echo :: Fixing up the man pages...

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

# can leave SGIextensions.3 alone, it's an okay name
mv s20_3_1_base.3           Intro_functors.3
mv s20_3_2_arithmetic.3     Arithmetic_functors.3
mv s20_3_3_comparisons.3    Comparison_functors.3
mv s20_3_4_logical.3        Logical_functors.3
mv s20_3_5_negators.3       Negation_functors.3
mv s20_3_6_binder.3         Binder_functors.3
mv s20_3_7_adaptors.3       Func_ptr_functors.3
mv s20_3_8_memadaptors.3    Member_ptr_functors.3
mv std.3                    Namespace_Std.3

# man pages are for functions/types/other entities, not source files directly
find . -name "[a-z]*" -a ! -name "std_*" -print | xargs rm
rm -f *.h.3 *config* *.cc.3 *.tcc.3

# 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}/docs/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 '/#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 Allocators.3'
for f in $problematic; do
    sed '/^\.SH NAME/{
n
a\
\
.SH SYNOPSIS
    }' $f > TEMP
    mv TEMP $f
done

cp ${srcdir}/docs/doxygen/Intro.3 .

}

# all done
echo ::
echo :: Doxygen output begins with
echo :: ${outdir}/html_${mode}/index.html
echo ::
echo :: Man pages in ${outdir}/man
echo ::

exit 0

# vim:ts=4:et: