Blame Functions/Help/help_renameCrossReferences.sh

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#!/bin/bash
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#
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# help_renameCrossReferences.sh -- This function replaces a node
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# pattern with a node replacement and updates cross-reference
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# definitions to reflect the changes.
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#
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# Copyright (C) 2009-2011 Alain Reguera Delgado
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# 
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 2 of the
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# License, or (at your option) any later version.
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# 
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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# USA.
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# 
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# ----------------------------------------------------------------------
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# $Id$
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# ----------------------------------------------------------------------
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function help_renameCrossReferences {
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    local NODE=''
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    local COUNT=1
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    local ENTRIES=''
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    local NODE_SRC=''
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    local NODE_DST=''
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    # Define node pattern for source documenation entry.
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    NODE_SRC=$(echo "$ENTRY" \
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        | cut -d / -f8- \
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        | tr '/' ' ' \
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        | sed -r \
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            -e "s/(chapter-intro\.texi|\.texi)$//" \
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            -e 's! !( |\\n)!g')
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    # Define node replacement for target documentation entry.
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    NODE_DST=$(echo "$FLAG_TO" \
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        | cut -d / -f8- \
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        | tr '/' ' ' \
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        | sed -r \
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            -e "s/(chapter-intro\.texi|\.texi)$//")
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    # Sanitate node replacement for target documentation entry to make
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    # use of regular expression positional markers, so the word
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    # separator character found by node pattern could be used.
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    for NODE in $NODE_DST;do
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        if [[ $COUNT -eq 1 ]];then 
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            NODE_DST="${NODE}\\${COUNT}"
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        else
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            NODE_DST="${NODE_DST}$(echo "${NODE}\\${COUNT}")"
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        fi
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        COUNT=$(($COUNT + 1))
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    done
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    # Remove last positional marker from node replacement.
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    NODE_DST=$(echo $NODE_DST | sed -r 's!\\[[:digit:]]$!!')
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    # Define list of entries to process.
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    ENTRIES=$(cli_getFilesList "${MANUAL_BASEDIR}" '.*\.texi')
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    # Set action preamble.
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    cli_printActionPreamble "$ENTRIES" '' ''
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    # Update node-related cross-references. The node-related cross
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    # reference definition, long ones specially, could require more
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    # than one line to be set. By default, GNU sed does not matches 
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    # newline characters in the pattern space, so we need to make use
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    # of `label' feature and the `N' command in order to build a
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    # pattern space that includes the newline character in it. Here we
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    # use the `a' letter to name the label we use, followed by N
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    # command to add a newline to the pattern space, the s command to
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    # make the pattern replacement using the `g' flag to make it
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    # global and finaly the command `b' to branch label named `a'.
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    sed -r -i ":a;N;s!${NODE_SRC}!${NODE_DST}!g;ba" ${ENTRIES}
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    # At this point, source documentation entry has been renamed from
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    # source to target documentation entry, but they are still
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    # commented. So, restore target documentation entries.
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    help_restoreCrossReferences "${FLAG_TO}"
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}