Blame Scripts/Functions/Help/help.sh

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#!/bin/bash
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#
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# help.sh -- This function provides documentation features to
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# centos-art.sh script. Here we initialize documentation variables and
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# call help_getArguments functions.
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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 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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# $Id$
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# ----------------------------------------------------------------------
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function help {
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    local ACTIONNAM=''
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    local ACTIONVAL=''
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    local -a ACTIONVALS
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    # Define manuals base directory. This is the place where
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    # documentation manuals base directory structures are stored and
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    # organized in.
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    MANUAL_BASEDIR="${HOME}/artwork/trunk/Manual"
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    # Define file name for documentation manual. This is the file used
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    # to initiate the structure of documentation manual.
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    MANUAL_NAME=repository
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    # Define base name for documentation manual files (without
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    # extension). This is the main file name used to build texinfo
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    # related files (.info, .pdf, .xml, etc.).
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    MANUAL_BASEFILE="${MANUAL_BASEDIR}/${MANUAL_NAME}"
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    # Interpret option arguments passed through command-line.
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    help_getOptions
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    # Redefine positional parameters using ARGUMENTS. At this point,
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    # option arguments have been removed from ARGUMENTS variable and
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    # only non-option arguments remain in it. 
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    eval set -- "$ARGUMENTS"
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    # Store remaining arguments into an array. This way it is possible
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    # to find out which is the last argument in the list.  When
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    # copying files inside the repository, the last argument in the
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    # list is considered the target location and all other arguments
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    # are considered source the locations. Similary, when renaming
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    # files, only two arguments can be passed.
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    for ACTIONVAL in "$@";do
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        ACTIONVALS[((++${#ACTIONVALS[*]}))]="$ACTIONVAL"
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    done
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    # Enforce conditions against remaining non-option arguments before
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    # processing them.
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    if [[ ${ACTIONNAM} == ${FUNCNAM}_copyEntry ]];then
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        # When a documentation entry is copied, we need to determine
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        # what location to use as target.  To solve this, the last
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        # argument passed to centos-art script is taken as target
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        # location. All other arguments previously defined are
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        # considered source locations. Notice that more than one
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        # source location can be specified, but just one target
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        # location can exist.
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        local -a ENTRY_SRC
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        local ENTRY_DST=''
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        local COUNT=0
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        # Define list of source locations using remaining arguments.
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        while [[ ${COUNT} -lt $((${#ACTIONVALS[*]} - 1)) ]];do
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            ENTRY_SRC[((++${#ENTRY_SRC[*]}))]=${ACTIONVALS[$COUNT]}
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            COUNT=$(($COUNT + 1))
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        done
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        # Define target location.
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        ENTRY_DST=$(cli_checkRepoDirTarget "${ACTIONVALS[((${#ACTIONVALS[*]} - 1))]}")
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        # Define target documentation entry.
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        ENTRY_DST=$(help_getEntry "$ENTRY_DST")
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        # Redefine arguments to store source locations only.
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        ARGUMENTS=${ENTRY_SRC[@]}
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    elif [[ ${ACTIONNAM} == ${FUNCNAM}_renameEntry ]];then
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        # When documentation entry is renamed, we need to restrict the
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        # number of arguments to two arguments only.  More than two
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        # arguments are useless since the renaming action works with
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        # two arguments only. This is, the source location and the
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        # target location.
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        local ENTRY_SRC=''
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        local ENTRY_DST=''
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        # Verify number of arguments passed to centos-art.sh script.
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        if [[ ${#ACTIONVALS[*]} -gt 2 ]];then
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            cli_printMessage "`gettext "Only two arguments are accepted."`" 'AsErrorLine'
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            cli_printMessage "${FUNCDIRNAME}" 'AsToKnowMoreLine'
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        elif [[ ${#ACTIONVALS[*]} -lt 2 ]];then
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            cli_printMessage "`gettext "Two arguments are required."`" 'AsErrorLine'
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            cli_printMessage "${FUNCDIRNAME}" 'AsToKnowMoreLine'
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        fi
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        # Define source location. 
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        ENTRY_SRC=${ACTIONVALS[0]}
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        # Define target location.
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        ENTRY_DST=$(cli_checkRepoDirTarget "${ACTIONVALS[1]}")
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        # Define target documentation entry.
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        ENTRY_DST=$(help_getEntry "${ACTIONVALS[1]}")
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        # Redefine arguments to store source locations only.
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        ARGUMENTS=$ENTRY_SRC
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    else
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        # Redefine arguments to store all arguments.
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        ARGUMENTS=$@
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    fi
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    # Define action name. It does matter what option be passed to
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    # centos-art, there are many different actions to perform based on
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    # the option passed (e.g., `--edit', `--read', `--search', etc.).
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    # In that sake, we defined action name inside help_getArguments,
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    # at the moment of interpreting options.
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    # Define action value. As convenction, we use non-option arguments
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    # to define the action value (ACTIONVAL) variable.
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    for ACTIONVAL in $ARGUMENTS;do
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        # Check action value passed through the command-line using
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        # source directory definition as reference.
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        cli_checkRepoDirSource
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        # Define documentation entry.
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        ENTRY=$(help_getEntry)
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        # Define documentation entry directory. This is the directory
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        # where the entry file is stored.
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        ENTRY_DIR=$(dirname ${ENTRY} | sed -r 's!\.texi$!!')
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        # Define documentation entry file (without extension).
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        ENTRY_FILE=$(basename ${ENTRY} | sed -r 's!\.texi$!!')
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        # Define directory to store documentation entries.  At this
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        # point, we need to take a desition about documentation
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        # design, in order to answer the question: How do we assign
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        # chapters, sections and subsections automatically, based on
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        # the repository structure?  and also, how such design could
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        # be adapted to changes in the repository structure?
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        #
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        # One solution would be: represent the repository's directory
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        # structure as sections inside a chapter named `Directories'
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        # or something similar. Subsections and subsubsections will
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        # not have their own files, they all will be written inside
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        # the same section file that represents the repository
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        # documentation entry.
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        MANUAL_CHAPTER_DIR=$(echo $ENTRY | cut -d / -f-7)
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        # Define chapter name for the documentation entry we are
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        # working with.
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        MANUAL_CHAPTER_NAME=$(basename "$MANUAL_CHAPTER_DIR")
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        # Set action preable.
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        cli_printActionPreamble "${MANUAL_BASEFILE}.texi" '' ''
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        # Syncronize changes between repository and working copy. At
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        # this point, changes in the repository are merged in the
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        # working copy and changes in the working copy committed up to
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        # repository.
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        cli_syncroRepoChanges ${MANUAL_CHAPTER_DIR}
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        # Execute action name.
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        if [[ $ACTIONNAM =~ "^${FUNCNAM}_[A-Za-z]+$" ]];then
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            eval $ACTIONNAM
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        else
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            cli_printMessage "`gettext "A valid action is required."`" 'AsErrorLine'
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            cli_printMessage "${FUNCDIRNAM}" 'AsToKnowMoreLine'
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        fi
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        # Commit changes from working copy to central repository only.
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        # At this point, changes in the repository are not merged in
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        # the working copy, but chages in the working copy do are
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        # committed up to repository.
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        cli_commitRepoChanges ${MANUAL_CHAPTER_DIR}
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    done
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}