Blame Scripts/Functions/Help/Texinfo/texinfo_renameCrossReferences.sh

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#!/bin/bash
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#
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# texinfo_renameCrossReferences.sh -- This function renames menu,
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# nodes and cross references related to chapters and sections that
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# have been renamed previously.
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#
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# Copyright (C) 2009, 2010, 2011 The CentOS Project
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or (at
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# 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., 675 Mass Ave, Cambridge, MA 02139, USA.
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#
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# ----------------------------------------------------------------------
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# $Id$
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# ----------------------------------------------------------------------
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function texinfo_renameCrossReferences {
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    local -a PATTERN
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    local -a REPLACE
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    # Build source and target node definitions.
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    local NODE_SRC="$(texinfo_getEntryNode "$MANUAL_ENTRY_SRC")"
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    local NODE_DST="$(texinfo_getEntryNode "$MANUAL_ENTRY_DST")"
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    # Define regular expression pattern and its replacement for node
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    # definitions that have been previously removed.
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    PATTERN[0]="--- @strong\{`gettext "Removed"`\}\((pxref|xref|ref):\<${NODE_SRC}\>(.*)\) ---"
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    REPLACE[0]="\@\1{${NODE_DST}\2}"
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    # Define regular expression pattern and its replacement for menu
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    # definitions that have been previously removed.
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    PATTERN[1]="^@comment --- `gettext "Removed"`\(\* \<${NODE_SRC}\>(.*)\) ---$"
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    REPLACE[1]="* ${NODE_DST}\1"
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    # Define list of entries to process. This is, all the texinfo
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    # source files the documentation manual is made of.
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    local MANUAL_ENTRIES=$(cli_getFilesList ${MANUAL_BASEDIR_L10N} \
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        --pattern=".+\.${MANUAL_EXTENSION}")
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    # Update node cross references. The node-related cross reference
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    # definition, long ones specially, could require more than one
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    # line to be set. By default, GNU sed does not matches newline
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    # characters in the pattern space, so we need to make use of
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    # `label' feature and the `N' command in order to build a pattern
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    # space that includes the newline character in it. Here we use the
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    # `a' letter to name the label we use, followed by N command to
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    # add a newline to the pattern space, the s command to make the
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    # pattern replacement using the `g' flag to make it global and
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    # finaly the command `b' to branch label named `a'.
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    #
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    # Inside the pattern space, the `\<' and `\>' are used to restrict
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    # the match pattern to a word boundary. The word boundary
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    # restriction applied here is required to avoid undesired
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    # replacements when we replace singular words with their plurals.
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    # For example, if we need to change the node `Manual' to its
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    # plular (i.e., `Manuals'), and no boundary restriction is used in
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    # the pattern space to do that, we might end up having nodes like
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    # `Manualsssss' which probably doesn't exist. This is because this
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    # sed command might be applied to the same file more than once;
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    # and each time it is applied, a new `Manuals' replaces the
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    # previous `Manuals' replacement to form `Manualss', `Manualsss',
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    # and so on for each interaction. Using word boundaries
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    # restrictions prevent such issue from happening.
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    sed -r -i ":a;N;s!${PATTERN[0]}!${REPLACE[0]}!g;ba" ${MANUAL_ENTRIES}
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    # Update menu cross references. Menu cross reference definitions
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    # hardly appear in more than one line, so there is no need to
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    # complicate the replacement command.
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    sed -r -i "s!${PATTERN[1]}!${REPLACE[1]}!" ${MANUAL_ENTRIES}
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}