Blame Scripts/Functions/cli_checkFiles.sh

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#!/bin/bash
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#
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# cli_checkFiles.sh -- This function standardizes the way file
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# conditional expressions are applied inside centos-art.sh script.
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# Here is where we answer questions like: is the file a regular file
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# or a directory?  or, is it a symbolic link? or even, does it have
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# execution rights, etc.  If the verification fails somehow at any
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# point, an error message is output and centos-art.sh script ends its
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# execution. 
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#
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# More than one file can be passed to this function, so we want to
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# process them all as specified by the options. Since we are using
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# getopt output it is possible to determine where options and
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# non-option arguments are in the list of arguments  (e.g., options
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# are on the left side of ` -- ' and non-options on the rigth side of
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# ` -- '). Non-options are the files we want to verify and options how
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# we want to verify them.
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#
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# Another issue to consider, when more than one file is passed to this
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# function, is that we cannot shift positional parameters as we
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# frequently do whe just one argument is passsed, doing so would
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# annulate the validation for the second and later files passed to the
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# function. So, in order to provide verification to all files passed
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# to the function, the verification loop must be set individual for
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# each option in this function.
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#
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# Assuming no option be passed to the function, a general verification
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# is performed to determine whether or not the file exists without
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# considering the file type just its existence.
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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 (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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# $Id$
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# ----------------------------------------------------------------------
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function cli_checkFiles {
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    # Define short options.
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    local ARGSS='d,r,h,n,x,w'
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    # Define long options.
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    local ARGSL='directory,regular-file,symbolic-link,execution,versioned,working-copy'
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    # Initialize arguments with an empty value and set it as local
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    # variable to this function scope.
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    local ARGUMENTS=''
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    # Initialize file variable as local to avoid conflicts outside
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    # this function scope. In the file variable will set the file path
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    # we'r going to verify.
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    local FILE=''
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    # Redefine ARGUMENTS variable using current positional parameters. 
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    cli_parseArgumentsReDef "$@"
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    # Redefine ARGUMENTS variable using getopt output.
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    cli_parseArguments
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    # Redefine positional parameters using ARGUMENTS variable.
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    eval set -- "$ARGUMENTS"
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    # Define list of files we want to apply verifications to.
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    local FILES=$(echo $@ | sed -r 's!^.*--[[:space:]](.+)$!\1!')
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    # Verify files in the list. It is required at least one.
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    if [[ $FILES =~ '--$' ]];then
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        cli_printMessage "You need to provide one file at least." --as-error-line 
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    fi
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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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            -d|--directory )
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                for FILE in $(echo $FILES);do
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                    if [[ ! -d $FILE ]];then
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                        cli_printMessage "`eval_gettext "The directory \\\"\\\$FILE\\\" does not exist."`" --as-error-line
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                    fi
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                done
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                shift 1
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                ;;
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            -f|--regular-file )
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                for FILE in $(echo $FILES);do
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                    if [[ ! -f $FILE ]];then
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                        cli_printMessage "`eval_gettext "The file \\\"\\\$FILE\\\" is not a regular file."`" --as-error-line
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                    fi
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                done
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                shift 1
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                ;;
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            -h|--symbolic-link )
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                for FILE in $(echo $FILES);do
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                    if [[ ! -h $FILE ]];then
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                        cli_printMessage "`eval_gettext "The file \\\"\\\$FILE\\\" is not a symbolic link."`" --as-error-line
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                    fi
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                done
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                shift 1
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                ;;
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            -n|--versioned )
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                for FILE in $(echo $FILES);do
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                    if [[ $(cli_isVersioned $FILE) == 'false' ]];then
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                        cli_printMessage "`eval_gettext "The path \\\"\\\$FILE\\\" is not versioned."`" --as-error-line
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                    fi
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                done
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                shift 1
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                ;;
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            -x|--execution )
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                for FILE in $(echo $FILES);do
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                    if [[ ! -x $FILE ]];then
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                        cli_printMessage "`eval_gettext "The file \\\"\\\$FILE\\\" is not executable."`" --as-error-line
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                    fi
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                done
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                shift 1
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                ;;
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            -w|--working-copy )
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                for FILE in $(echo $FILES);do
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                    if [[ ! $FILE =~ "^${CLI_WRKCOPY}/.+$" ]];then
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                        cli_printMessage "`eval_gettext "The path \\\"\\\$FILE\\\" does not exist inside the working copy."`" --as-error-line
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                    fi
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                done
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                shift 1
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                ;;
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            -- )
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                for FILE in $(echo $FILES);do
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                    if [[ ! -a $FILE ]];then
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                        cli_printMessage "`eval_gettext "The path \\\"\\\$FILE\\\" does not exist."`" --as-error-line
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                    fi
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                done
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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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}