Blame Scripts/Functions/cli.sh

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#!/bin/bash
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#
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# cli.sh -- This function initiates centos-art command-line interface.
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# Variables defined in this function are accesible by all other
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# functions. The cli function is the first script executed by
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# centos-art command-line onces invoked.
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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 cli {
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    # Initialize global variables.
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    local FUNCNAM=''
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    local FUNCDIR=''
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    local FUNCDIRNAM=''
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    local FUNCSCRIPT=''
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    local FUNCCONFIG=''
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    local ARGUMENTS=''
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    # Initialize default value to filter flag. The filter flag
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    # (--filter) is used mainly to reduce the number of files to
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    # process. The value of this variable is interpreted as
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    # egrep-posix regular expression.  By default, everything matches.
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    local FLAG_FILTER='.+'
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    # Initialize default value to verbosity flag. The verbosity flag
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    # (--quiet) controls whether centos-art.sh script prints messages
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    # or not. By default, all messages are printed out.
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    local FLAG_QUIET='false'
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    # Initialize default value to answer flag. The answer flag
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    # (--answer-yes) controls whether centos-art.sh script does or
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    # does not pass confirmation request points. By default, it
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    # doesn't.
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    local FLAG_ANSWER='false'
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    # Initialize default value to don't commit changes flag. The don't
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    # commit changes flag (--dont-commit-changes) controls whether
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    # centos-art.sh script syncronizes changes between the central
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    # repository and the working copy. By default, it does.
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    local FLAG_DONT_COMMIT_CHANGES='false'
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    # Redefine ARGUMENTS variable using current positional parameters. 
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    cli_doParseArgumentsReDef "$@"
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    # Define function directory (FUNCDIR). The directory path where
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    # functionalities are stored inside the repository.
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    FUNCDIR=${CLI_BASEDIR}/Functions
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    # Check function name. The function name is critical for
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    # centos-art.sh script to do something coherent. If it is not
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    # provided, execute the help functionality and end script
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    # execution.
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    if [[ "$1" == '' ]];then
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        exec ${CLI_BASEDIR}/centos-art.sh help
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        exit
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    fi
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    # Define function name (FUNCNAM) variable from first command-line
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    # argument.  As convenction we use the first argument to determine
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    # the exact name of functionality to call.
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    FUNCNAM=$(cli_getRepoName "$1" 'f')
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    # Define function directory. 
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    FUNCDIRNAM=$(cli_getRepoName "$FUNCNAM" 'd')
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    # Define function file name.
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    FUNCSCRIPT=${FUNCDIR}/${FUNCDIRNAM}/${FUNCNAM}.sh
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    # Check function script execution rights.
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    cli_checkFiles $FUNCSCRIPT 'x'
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    # Define function configuration directory. The function
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    # configuration directory is used to store functionality's
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    # related files.
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    FUNCCONFIG=${FUNCDIR}/${FUNCDIRNAM}/Config
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    # Remove the first argument passed to centos-art.sh command-line
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    # in order to build optional arguments inside functionalities. We
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    # start counting from second argument (inclusive) on.
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    shift 1
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    # Redefine ARGUMENTS using current positional parameters.
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    cli_doParseArgumentsReDef "$@"
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    # Define default text editors used by centos-art.sh script.
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    if [[ ! "$EDITOR" =~ '/usr/bin/(vim|emacs|nano)' ]];then
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        EDITOR='/usr/bin/vim'
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    fi
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    # Check text editor execution rights.
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    cli_checkFiles $EDITOR 'x'
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    # Go for function initialization. Keep the cli_getFunctions
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    # function calling after all variables and arguments definitions.
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    cli_getFunctions
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}