Blame Scripts/Functions/Help/help.sh

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#!/bin/bash
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#
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# help.sh -- This function initializes the interface used by
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# centos-art.sh script to perform documentation tasks through
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# different documentation backends.
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#
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# Copyright (C) 2009, 2010, 2011 The CentOS Artwork SIG
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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
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# (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., 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 help {
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    # Initialize action name with an empty value.
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    local ACTIONNAM=''
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    # Initialize search option (`--search'). This option is used to
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    # look for documentation inside documentation backends.
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    local FLAG_SEARCH=""
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    # Initialize the backend flag (`--backend'). This option sets the
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    # documentation backed used to perform documentation actions.
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    local FLAG_BACKEND='texinfo'
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    # Initialize manual's language.
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    local MANUAL_L10N=$(cli_getCurrentLocale)
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    # Initialize manuals's top-level directory. This is the place
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    # where the manual will be stored in. To provide flexibility, the
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    # current directory where the `centos-art.sh' script was called
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    # from is used as manual's top-level directory.  Notice that this
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    # relaxation is required because we need to create/maintain
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    # manuals both under `trunk/Manuals/' and `branches/Manuals/'
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    # directories.
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    local MANUAL_TLDIR=${PWD}
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    # Verify manual's top-level directory. To prevent messing the
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    # things up, we need to restrict the possible locations
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    # documentation manuals can be created inside the working copy.
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    # When manual's top-level location is other but the ones
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    # permitted, use `trunk/Manuals' directory structure as default
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    # location to store documentation manuals.
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    if [[ ! $MANUAL_TLDIR =~ "^${HOME}/artwork/(trunk/Manuals|branches/Manuals/[[:alnum:]-]+)" ]];then
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        MANUAL_TLDIR="${HOME}/artwork/trunk/Manuals"
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    fi
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    # Initialize arrays related to documentation entries. Arrays
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    # defined here contain all the information needed to process
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    # documentation entries written in texinfo format.
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    local -a MANUAL_SLFN
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    local -a MANUAL_DIRN
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    local -a MANUAL_CHAN
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    local -a MANUAL_SECN
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    # Initialize counter of non-option arguments.
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    local MANUAL_DOCENTRY_COUNT=0
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    local MANUAL_DOCENTRY_ID=0
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    # Interpret option arguments passed through the command-line.
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    ${FUNCNAM}_getOptions
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    # Redefine arrays related to documentation entries using
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    # non-option arguments passed through the command-line. At this
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    # point all options have been removed from ARGUMENTS and
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    # non-option arguments remain. Evaluate ARGUMENTS to retrive the
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    # information related documentation entries from there.
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    ${FUNCNAM}_getEntries
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    # Initialize backend functionalities. At this point we load all
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    # functionalities required into the centos-art.sh's execution
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    # environment and make them available, this way, to perform
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    # backend-specific documentation tasks.
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    cli_exportFunctions "${FUNCDIR}/${FUNCDIRNAM}/$(cli_getRepoName \
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        ${FLAG_BACKEND} -d)" "${FLAG_BACKEND}"
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    # Execute backend-specific documentation tasks for each
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    # documentation entry specified in the command-line, individually.
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    # Notice that we've stored all documentation entries passed as
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    # non-option arguments in array variables in order to process them
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    # now, one by one.  This is particularily useful when we need to
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    # reach items in the array beyond the current iteration cycle. For
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    # example, when we perform actions that require source and target
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    # locations (e.g., copying and renaming): we use the current value
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    # as source location and the second value in the array as target
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    # location; both defined from the first iteration cycle.
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    while [[ $MANUAL_DOCENTRY_ID -lt $MANUAL_DOCENTRY_COUNT ]];do
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        # Define name used by manual's main definition file.
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        MANUAL_NAME=${MANUAL_SLFN[${MANUAL_DOCENTRY_ID}]}
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        # Define absolute path to directory holding language-specific
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        # directories.
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        MANUAL_BASEDIR="${MANUAL_TLDIR}/${MANUAL_DIRN[${MANUAL_DOCENTRY_ID}]}"
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        # Define absolute path to directory holding language-specific
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        # texinfo source files.
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        MANUAL_BASEDIR_L10N="${MANUAL_BASEDIR}/${MANUAL_L10N}"
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        # Define absolute path to changed directories inside the
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        # manual. For example, when a section entry is edited, copied
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        # or renamed inside  the same manual there is only one
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        # aboslute path to changed directory to look for changes, the
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        # one holding the section entry.  However, when a manual entry
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        # is renamed, there are two different locations to look for
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        # changes, the source manual removed and the target manual
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        # added.
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        MANUAL_CHANGED_DIRS="${MANUAL_BASEDIR_L10N}"
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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. Notice that, because we are processing
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        # non-option arguments one by one, there is no need to
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        # sycronize changes to the same manual time after time
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        # (assuming all documentation entries passed as non-option
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        # arguments refer the same manual directory name).
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        if [[ ${MANUAL_DOCENTRY_ID} -eq 0 \
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            || ( ( ${MANUAL_DOCENTRY_ID} -gt 0 ) && ( \
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            ${MANUAL_DIRN[${MANUAL_DOCENTRY_ID}]} != ${MANUAL_DIRN[((${MANUAL_DOCENTRY_ID} - 1))]} ) ) ]];then
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            cli_syncroRepoChanges ${MANUAL_CHANGED_DIRS}
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        fi
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        # Define absolute path to base file. This is the main file
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        # name (without extension) we use as reference to build output
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        # files in different formats (.info, .pdf, .xml, etc.).
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        MANUAL_BASEFILE="${MANUAL_BASEDIR_L10N}/${MANUAL_NAME}"
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        # Define chapter name.
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        MANUAL_CHAPTER_NAME=${MANUAL_CHAN[${MANUAL_DOCENTRY_ID}]}
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        # Define section name.
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        MANUAL_SECTION_NAME=${MANUAL_SECN[${MANUAL_DOCENTRY_ID}]}
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        # Execute backend-specific documentation tasks.
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        ${FLAG_BACKEND}
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        # Increment documentation entry counter id.
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        MANUAL_DOCENTRY_ID=$(($MANUAL_DOCENTRY_ID + 1))
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    done
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    # Rebuild output files to propagate recent changes.
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    ${FLAG_BACKEND}_updateOutputFiles
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    # Commit changes from working copy to central repository only.  At
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    # this point, changes in the repository are not merged in the
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    # working copy, but chages in the working copy do are committed up
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    # to repository.
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    cli_commitRepoChanges ${MANUAL_CHANGED_DIRS}
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}