#!/bin/bash -
# podwrapper.sh
# Copyright (C) 2010-2011 Red Hat Inc.
# @configure_input@
#
# 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 2 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, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

# Wrapper script around POD utilities which can include files in the
# POD and controls HTML generation.

unset CDPATH

set -e
#set -x

PACKAGE_NAME="@PACKAGE_NAME@"
PACKAGE_VERSION="@PACKAGE_VERSION@"
POD2MAN="@POD2MAN@"
POD2TEXT="@POD2TEXT@"
POD2HTML="@POD2HTML@"
POD2_STDERR_OPTION="@POD2_STDERR_OPTION@"
POD2_UTF8_OPTION="@POD2_UTF8_OPTION@"

# This script could be run with any current directory, so if a source
# or build path is required it must be relative to the following
# absolute paths:
abs_top_srcdir="@abs_top_srcdir@"
abs_top_builddir="@abs_top_builddir@"

if [ -z "$abs_top_srcdir" ]; then
    echo "*** podwrapper.sh: error: abs_top_srcdir not defined"
    echo "probably this is a very old version of autoconf and you need to"
    echo "upgrade to a recent version"
    exit 1
fi

if [ -z "$abs_top_builddir" ]; then
    echo "*** podwrapper.sh: error: abs_top_builddir not defined"
    echo "probably this is a very old version of autoconf and you need to"
    echo "upgrade to a recent version"
    exit 1
fi

declare -a inserts
declare -a pattern
declare -a indent
nr_inserts=0

TEMP=`getopt \
        -o '' \
        --long section:,name:,man:,text:,html:,insert:,verbatim: \
        -n podwrapper.sh -- "$@"`
if [ $? != 0 ]; then
    echo "podwrapper.sh: problem parsing the command line arguments"
    exit 1
fi
eval set -- "$TEMP"

while true; do
    case "$1" in
        --section)
            section="$2"
            shift 2;;
        --name)
            name="$2"
            shift 2;;
        --man)
            [ -z "$man_output" ] || {
                echo "podwrapper.sh: --text option specified more than once"
                exit 1
            }
            man_output="$2"
            shift 2;;
        --text)
            [ -z "$text_output" ] || {
                echo "podwrapper.sh: --text option specified more than once"
                exit 1
            }
            text_output="$2"
            shift 2;;
        --html)
            [ -z "$html_output" ] || {
                echo "podwrapper.sh: --html option specified more than once"
                exit 1
            }
            html_output="$2"
            shift 2;;
        --insert)
            inserts[$nr_inserts]=`echo "$2" | awk -F: '{print $1}'`
            pattern[$nr_inserts]=`echo "$2" | awk -F: '{print $2}'`
            indent[$nr_inserts]=no
            ((++nr_inserts))
            shift 2;;
        --verbatim)
            inserts[$nr_inserts]=`echo "$2" | awk -F: '{print $1}'`
            pattern[$nr_inserts]=`echo "$2" | awk -F: '{print $2}'`
            indent[$nr_inserts]=yes
            ((++nr_inserts))
            shift 2;;
        --)
            shift; break;;
        *)
            echo "podwrapper.sh: internal error in option parsing"
            exit 1;;
    esac
done

# The remaining argument is the input POD file.
if [ $# -ne 1 ]; then
    echo "podwrapper.sh [--options] input.pod"
    exit 1
fi
input="$1"

#echo "input=$input"
#echo "man_output=$man_output"
#echo "text_output=$text_output"
#echo "html_output=$html_output"
#for i in `seq 0 $(($nr_inserts-1))`; do
#    echo "insert $i: ${inserts[$i]} (pattern: ${pattern[$i]} indent: ${indent[$i]})"
#done

# Should be at least one sort of output.
[ -z "$man_output" -a -z "$text_output" -a -z "$html_output" ] && {
    echo "podwrapper.sh: no output specified"
    exit 1
}

# If name and section are not set, make some sensible defaults.
[ -z "$section" ] && section=1
[ -z "$name" ] && name=$(basename "$input" .pod)

# Perform the insertions to produce a temporary POD file.
tmpdir="$(mktemp -d)"
trap "rm -rf $tmpdir; exit $?" EXIT

if [ $nr_inserts -gt 0 ]; then
    cmd="sed"

    for i in `seq 0 $(($nr_inserts-1))`; do
        if [ "${indent[$i]}" = "yes" ]; then
            sed 's/^/ /' < "${inserts[$i]}" > $tmpdir/$i
        else
            cp "${inserts[$i]}" $tmpdir/$i
        fi

        cmd="$cmd -e /${pattern[$i]}/r$tmpdir/$i -e s/${pattern[$i]}//"
    done

    $cmd < "$input" > $tmpdir/full.pod
else
    cp "$input" $tmpdir/full.pod
fi

# Now generate the final output format(s).
if [ -n "$man_output" ]; then
    "$POD2MAN" "$POD2_STDERR_OPTION" "$POD2_UTF8_OPTION" \
        --section "$section" -c "Virtualization Support" --name "$name" \
        --release "$PACKAGE_NAME-$PACKAGE_VERSION" \
        < $tmpdir/full.pod > "$man_output".tmp
    mv "$man_output".tmp "$man_output"
fi

if [ -n "$text_output" ]; then
    "$POD2TEXT" "$POD2_STDERR_OPTION" "$POD2_UTF8_OPTION" \
        < $tmpdir/full.pod > "$text_output".tmp
    mv "$text_output".tmp "$text_output"
fi

if [ -n "$html_output" ]; then
    "$POD2HTML" \
        --css "pod.css" --htmldir "$abs_top_builddir/html" \
        < $tmpdir/full.pod > "$html_output".tmp
    mv "$html_output".tmp "$html_output"

    # Fix up some of the mess in the HTML output, mainly to make links
    # between man pages work properly.

    # Rewrite <em>manpage(n)</em> to <a href=...>manpage(n)</a> if
    # there is a linkable manual page.
    sed_cmd="sed"
    for f in $(cd "$abs_top_builddir/html" && ls -1 *.html); do
        b=$(basename $f .html)
        m=$(echo $b | sed 's/\(.*\)\.\([1-9]\)$/\1(\2)/')
        sed_cmd="$sed_cmd -e 's,<em>$m</em>,<a href=$f>$m</a>,g'"
    done
    echo $sed_cmd
    eval $sed_cmd < "$html_output" > "$html_output".tmp
    mv "$html_output".tmp "$html_output"

    # Fix links like L<guestfs-foo(3)>
    sed 's,<a href="#\([a-z]\+\)">guestfs-\1(\([1-9]\)),<a href="guestfs-\1.\2.html">guestfs-\1(\2),g' < "$html_output" > "$html_output".tmp
    mv "$html_output".tmp "$html_output"
fi