Blame Scripts/tcar_getPathComponent.sh

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#!/bin/bash
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######################################################################
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#
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#   tcar_getPathComponent.sh -- This function standardizes the way
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#   directory structures are organized inside the working copy of
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#   CentOS Artwork Repository. You can use this function to retrieve
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#   information from paths (e.g., releases, architectures and theme
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#   artistic motifs) or the patterns used to build the paths.
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#
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#   Written by:
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#   * Alain Reguera Delgado <al@centos.org.cu>, 2009-2013
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#
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# Copyright (C) 2009-2013 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 (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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function tcar_getPathComponent {
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    # Define short options.
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    local ARGSS=''
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    # Define long options.
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    local ARGSL='release,release-major,release-minor,release-pattern,architecture,architecture-pattern,motif,motif-name,motif-version,motif-pattern,repo-dir'
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    # Define release pattern.
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    local VERSION="(([[:digit:]]+)(\.([[:digit:]]+))?)"
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    # Define architecture pattern. Make it match the architectures the
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    # CentOS distribution is able to be installed on.
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    local ARCHITECTURE="(i386|x86_64)"
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    # Define regular expression pattern that match the theme artistic
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    # motif component inside the path strings.
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    local THEME_MOTIF="Themes/Motifs/(([[:alnum:]]+)/(${VERSION}))"
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    # Initialize arguments with an empty value and set it as local
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    # variable to this function scope. Doing this is very important to
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    # avoid any clash with higher execution environments.
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    local TCAR_MODULE_ARGUMENT=''
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    # Process all arguments currently available in this function
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    # environment. If either ARGSS or ARGSL local variables have been
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    # defined, argument processing goes through getopt for validation.
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    tcar_setModuleArguments "${@}"
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    # Redefine positional parameters using TCAR_MODULE_ARGUMENT variable.
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    eval set -- "${TCAR_MODULE_ARGUMENT}"
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    # Define location we want to apply verifications to.
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    local LOCATION=$(echo ${@} | sed -r 's!^.*--[[:space:]](.+)$!\1!')
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    # Look for options passed through positional parameters.
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    while true;do
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        case "${1}" in
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            --release )
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                echo "${LOCATION}" | egrep "${VERSION}" | sed -r "s!.*/${VERSION}/.*!\1!"
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                shift 1
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                break
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                ;;
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            --release-major )
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                echo "${LOCATION}" | egrep "${VERSION}" | sed -r "s!.*/${VERSION}/.*!\2!"
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                shift 1
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                break
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                ;;
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            --release-minor )
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                echo "${LOCATION}" | egrep "${VERSION}" | sed -r "s!.*/${VERSION}/.*!\4!"
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                shift 1
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                break
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                ;;
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            --release-pattern )
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                echo "${VERSION}"
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                shift 1
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                break
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                ;;
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            --architecture )
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                echo "${LOCATION}" | egrep "${ARCHITECTURE}" | sed -r "s!${ARCHITECTURE}!\1!"
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                shift 1
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                break
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                ;;
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            --architecture-pattern )
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                echo "${ARCHITECTURE}"
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                shift 1
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                break
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                ;;
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            --motif )
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                echo "${LOCATION}" | egrep "${THEME_MOTIF}" | sed -r "s!.*${THEME_MOTIF}.*!\1!"
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                shift 1
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                break
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                ;;
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            --motif-name )
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                echo "${LOCATION}" | egrep "${THEME_MOTIF}" | sed -r "s!.*${THEME_MOTIF}.*!\2!"
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                shift 1
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                break
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                ;;
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            --motif-version )
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                echo "${LOCATION}" | egrep "${THEME_MOTIF}" | sed -r "s!.*${THEME_MOTIF}.*!\3!"
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                shift 1
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                break
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                ;;
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            --motif-pattern )
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                echo "${THEME_MOTIF}"
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                shift 1
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                break
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                ;;
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            --repo-dir )
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                echo "${LOCATION}" | sed "s,${TCAR_USER_WRKDIR}/,,"
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                shift 1
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                break
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                ;;
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        esac
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    done
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}