Blame tcar-scripts/tcar.sh

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#!/bin/bash
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######################################################################
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#
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#   tcar.sh -- The CentOS Artwork Repository automation tool.
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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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######################################################################
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# Identity
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######################################################################
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declare -xr TCAR_SCRIPT_PACKAGE="tcar"
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declare -xr TCAR_SCRIPT_VERSION="$(rpm -q --qf "%{VERSION}" ${TCAR_SCRIPT_PACKAGE})"
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######################################################################
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# Paths
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######################################################################
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# Base directory where repository files are installed in.
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declare -xr TCAR_BASEDIR=/usr/share/tcar
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# Base directory where final content is produced in. This value is
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# also known as the "workplace" and should be customized later by the
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# user, using the prepare module of tcar script.
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declare -xr TCAR_WORKDIR=/tmp
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# Base directory where automation scripts are installed in.
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declare -xr TCAR_SCRIPT_BASEDIR=${TCAR_BASEDIR}/Scripts
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# Directory to store temporal files.
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declare -xr TCAR_SCRIPT_TEMPDIR=$(mktemp -p /tmp -d ${TCAR_SCRIPT_PACKAGE}-XXXXXX)
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# Configuration files in order of reading preference. The last file in
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# the list overlaps options set in previous files in the list. Use
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# colon character to separate files in the list.
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declare -xr TCAR_SCRIPT_CONFIG=${HOME}/.tcar.conf
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# Base directory where man pages are searched at.
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declare -xr TCAR_SCRIPT_MANUALS=/usr/share/man
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# Base directory where automation script modules are installed in.
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declare -xr TCAR_SCRIPT_MODULES_BASEDIR=${TCAR_SCRIPT_BASEDIR}/Modules
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# Default text editor.
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declare -x  TCAR_SCRIPT_EDITOR=/usr/bin/vim
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######################################################################
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# Internationalization
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######################################################################
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# Set the script language information using the LC format. This format
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# shows both language and country information (e.g., `es_ES').
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declare -xr TCAR_SCRIPT_LANG_LC=$(echo ${LANG} | cut -d'.' -f1)
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# Set the script language information using the LL format. This format
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# shows only the language information (e.g., `es').
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declare -xr TCAR_SCRIPT_LANG_LL=$(echo ${TCAR_SCRIPT_LANG_LC} | cut -d'_' -f1)
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# Set the script language information using the CC format. This format
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# shows only the country information (e.g., `ES').
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declare -xr TCAR_SCRIPT_LANG_CC=$(echo ${TCAR_SCRIPT_LANG_LC} | cut -d'_' -f2)
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# Set function environments required by GNU gettext system.
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. gettext.sh
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# Set the script text domain. This information is used by gettext
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# system to retrieve translated strings from machine object (MO) files
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# with this name. This variable is reset each time a new module is
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# loaded, so the correct files can be used.
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declare -x TEXTDOMAIN="${TCAR_SCRIPT_PACKAGE}"
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# Set the script text domain directory. This information is used by
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# gettext system to know where the machine objects are stored in. This
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# variable is reset each time a new module is loaded, so the correct
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# files can be used.
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declare -xr TEXTDOMAINDIR=/usr/share/locale
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######################################################################
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# Global Flags
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######################################################################
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# Set filter flag (-f|--filter).  This flag is mainly used to reduce
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# the number of files to process and is interpreted as egrep-posix
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# regular expression.  By default, when this flag is not provided, all
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# paths in the working copy will match, except files inside hidden
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# directories like `.svn' and `.git' that will be omitted.
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declare -x  TCAR_FLAG_FILTER='[[:alnum:]_/-]+'
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# Set verbosity flag (-q|--quiet). This flag controls whether
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# tcar.sh script prints messages or not. By default, all
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# messages are suppressed except those directed to standard error.
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declare -x  TCAR_FLAG_QUIET='false'
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# Set affirmative flag (-y|--yes). This flag controls whether
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# tcar.sh script does or does not pass confirmation request
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# points. By default, it doesn't.
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declare -x  TCAR_FLAG_YES='false'
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# Set debugger flag (-d|--debug). This flag controls whether
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# tcar.sh script does or does not print debugging information.
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# The tcar.sh script prints debug information to standard
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# output.
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declare -x  TCAR_FLAG_DEBUG='false'
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######################################################################
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# Global Functions
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######################################################################
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# Export script's environment functions.
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for SCRIPT_FILE in $(ls ${TCAR_SCRIPT_BASEDIR}/tcar_*.sh);do
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    if [[ -x ${SCRIPT_FILE} ]];then
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        . ${SCRIPT_FILE}
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        export -f $(grep '^function ' ${SCRIPT_FILE} | cut -d' ' -f2)
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    else
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        echo "${SCRIPT_FILE} `gettext "has not execution rights."`"
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        exit 1
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    fi
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done
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######################################################################
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# Signals
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######################################################################
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# Trap signals in order to terminate the script execution correctly
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# (e.g., removing all temporal files before leaving).  Trapping the
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# exit signal seems to be enough by now, since it is always present as
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# part of the script execution flow. Each time the tcar.sh
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# script is executed it will inevitably end with an EXIT signal at
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# some point of its execution, even if it is interrupted in the middle
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# of its execution (e.g., through `Ctrl+C').
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trap tcar_terminateScriptExecution 0
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######################################################################
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# Parse Command-line Arguments
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######################################################################
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declare -x TCAR_MODULE_NAME=''
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declare -x TCAR_MODULE_ARGUMENT=''
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declare -x TCAR_SCRIPT_ARGUMENT=''
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# Retrieve module's name using the first argument of tcar.sh
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# script as reference.
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if [[ ! ${1} =~ '^-' ]];then
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    TCAR_MODULE_NAME="${1}"; shift 1
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else
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    TCAR_MODULE_NAME=""
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fi
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# Initialize tcar.sh script specific options. The way tcar.sh script
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# retrieves its options isn't as sophisticated (e.g., it doesn't
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# provide valid-option verifications) as it is provided by getopt
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# command. I cannot use getopt here because it is already used when
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# loading module-specific options. Using more than one invocation of
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# getopt in the same script is not possible (e.g., one of the
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# invocations may enter in conflict with the other one when different
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# option definitions are expected in the command-line.)
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while true; do
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    # Store non-option arguments passed to tcar.sh script.
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    if [[ ! ${1} =~ '^-' ]];then
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        TCAR_SCRIPT_ARGUMENT="${1} ${TCAR_SCRIPT_ARGUMENT}"
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        shift 1
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        if [[ $# -gt 0 ]];then
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            continue
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        else
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            break
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        fi
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    fi
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    case "${1}" in
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        --help* )
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            if [[ -z ${TCAR_MODULE_NAME} ]];then
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                # Print tcar.sh script's help. Consider that the
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                # --help option can receive an argument by using the
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                # equal sign (e.g.,
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                # --help=tcar_setModuleEnvironment.sh).  However, it
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                # is not possible to use spaces instead of equal sign
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                # because that would confuse other options from being
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                # parsed.
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                tcar_printHelp "${1}"
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                exit 0
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            else
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                # Store the argument for further processing inside the
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                # module environment that will be executed later.
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                TCAR_MODULE_ARGUMENT="-g ${1} ${TCAR_MODULE_ARGUMENT}"
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                shift 1
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            fi
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            ;;
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        --version )
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            # Print tcar.sh script's version.
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            if [[ -z ${TCAR_MODULE_NAME} ]];then
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                tcar_printVersion
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                exit 0
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            else
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                TCAR_MODULE_ARGUMENT="-g ${1} ${TCAR_MODULE_ARGUMENT}"
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                shift 1
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            fi
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            ;;
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        --quiet )
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            TCAR_FLAG_QUIET='true'
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            shift 1
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            ;;
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        --yes )
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            TCAR_FLAG_YES='true'
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            shift 1
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            ;;
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        --debug )
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            TCAR_FLAG_DEBUG='true'
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            shift 1
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            ;;
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        * ) 
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            # Store module-specific option arguments. This is, all
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            # arguments not considered part of tcar.sh script
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            # itself. The module-specific option arguments are passed,
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            # later, to getopt for option processing, inside the
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            # module-specific environments.
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            TCAR_MODULE_ARGUMENT="-g ${1} ${TCAR_MODULE_ARGUMENT}"
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            shift 1
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            if [[ $# -gt 0 ]];then
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                continue
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            else
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                break
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            fi
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            ;;
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    esac
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done
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# Initiate module-specific environment.
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tcar_setModuleEnvironment -m "${TCAR_MODULE_NAME}" ${TCAR_MODULE_ARGUMENT} ${TCAR_SCRIPT_ARGUMENT}
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# At this point everything has been done without errors. So, exit
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# tcar.sh script successfully.
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exit 0