#!/bin/bash

#

# manual_removeCrossReferences.sh -- This function looks inside

# texinfo source files, from section level on, and removes all cross

# referece definitions related to a documentation entry. Use this

# function in coordination with manual_removeEntry function, in order

# to keep cross reference information, inside the documentation

# manual, syncronized.

#

# Copyright (C) 2009, 2010 Alain Reguera Delgado

# 

# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307

# USA.

# 

# ----------------------------------------------------------------------

# $Id$

# ----------------------------------------------------------------------

function manual_removeCrossReferences {

    local -a PATTERN

    local -a REPLACE

    # Build the node string using global entry (ENTRY) variable being

    # processed currently.

    local NODE=$(echo "$ENTRY" \

        | cut -d / -f10- \

        | tr '/' ' ' \

        | sed -r "s/(${MANUALS_FILE[7]}|\.texi)$//")

    # Define regular expression patterns for texinfo cross reference

    # commands.

    PATTERN[0]="@(pxref|xref|ref)\{(${NODE})\}"

    PATTERN[1]="^(\* ${NODE}:(.*)?:(.*)?)$"

    # Define replacement string for missing entries. It is convenient

    # to keep missing entries in documentation for documentation team

    # to know. Removing the missing cross reference may intorudce

    # confussion. Imagine that! you are spending lots of hours in an

    # article and suddenly one of your cross refereces disappears with

    # no visible reason, with the next working copy update you

    # perform. That's frustrating. Instead, when centos-art.sh script

    # finds a missing cross reference it removes the link and remark

    # the issue for you to act on it.

    REPLACE[0]='--- @strong{'`gettext "Removed"`'}(\1:\2) ---'

    REPLACE[1]='@comment --- '`gettext "Removed"`'(\1) ---'

    # Sanitate all missing cross references, related to entry, in

    # section texinfo files. Missing cross references, related to

    # entry, in chapter texinfo files are already handled by

    # manual_updateMenu, and manual_updateNode functions. If we don't

    # sanitate missing cross refereces before info file is created,

    # errors are displayed since makeinfo don't produce info output

    # with broken cross refereces.

    sed -r -i \

        -e "s!${PATTERN[0]}!${REPLACE[0]}!Mg" \

        -e "s!${PATTERN[1]}!${REPLACE[1]}!g" \

        $(find ${MANUALS_DIR[2]} -mindepth 3 -name '*.texi')

}