#!/bin/bash

#************************************************************#
## 					$_PGR.sh 				    	         #
## 				written by Amjad khan			             #
##			Email: khan.amjadull@gmail.com		             #
##			Phone: +91-9900497591				 	         #
##			                                	 	         #
## #
## #
#************************************************************#

##************ Define some functions ******##

##----------------- Version? --------------##
## Give the version information and exit   ##
## Command line options -v or --version	   ##
## Exit status is 0						   ##
##-----------------------------------------##
function version()
{
	VER=$(echo '$Revision$' | sed -e 's/.*: //; s/ .*//; s/\$Revision\$/0.0/')
	YEAR=$(date +%Y)
	
	cat <<- ___VERSION_INFO___
	$MY_PRG ###utility### $VER
	Written by Amjad khan

	Copyright (C) $YEAR - GRAPES PVT LTD
	All rights reserved.
	___VERSION_INFO___

	exit 0
}


##----------------- Help ----------------##
## Give the help information and exit	 ##
## Command line options -h or --help	 ##
## Exit status is 0						 ##
##---------------------------------------##
function Help()
 {
	cat <<- ___HELP_MESSAGE___
	Usage: $MY_PRG [OPTION]... [FILE]...


	Examples: 
	  $MY_PRG			# Comments

	## ---<description>---

	Mandatory arguments to long options are mandatory for short options too.

	## ---<explanation for args>---
  
  
	  -h, --help	display this help and exit
	  -v, --version	output version information and exit

	## ---<extra info>---

	Report bugs to <khan.amjadull@gmail.com>.
	___HELP_MESSAGE___

	exit 0
}


##----------------- Cleanup ----------------##
## Clean up temporary files					##
## Exit status is 0							##
##------------------------------------------##
function cleanup_tmpfiles {
	rm -rf $_TMP
}



##--------- Syntax error :( ---------##
## Help to try Help					 ##
##-----------------------------------##
function try_help {		# Direct the user to get some help		
	echo "Try \`$MY_PRG --help' for more information" && exit 1		
}																	


##---------------- Getopts ------------------##
## Utility very similar to perl getopts      ##
## Can handle long options and set variables ##
##-------------------------------------------##
function Getopts(){

	declare  shorts
	declare  longs
	declare  same
	declare -a args
	local index

	until [ "$1" = "--" ] ; do

		if echo $1 |grep -q -P '^\S\|\S+:$'; then
			shorts=(${shorts[@]} ${1%|*}:)
			longs=(${longs[@]} ${1#*|})
			same=(${same[@]} $1);
	
		elif echo $1 |grep -q -P '^\S\|\S+$'; then
			shorts=(${shorts[@]} ${1%|*})
			longs=(${longs[@]} ${1#*|})
			same=(${same[@]} $1);
	
		elif echo $1 |grep -q -P '^\S+\|\S:$'; then
			longs=(${longs[@]} ${1%|*}:)
			shorts=(${shorts[@]} ${1#*|})
			same=(${same[@]} $1);
	
		elif echo $1 |grep -q -P '^\S+\|\S$'; then
			longs=(${longs[@]} ${1%|*})
			shortss=(${shorts[@]} ${1#*|})
			same=(${same[@]} $1);

		elif echo $1 |grep -q -P '^\S:?$';then
			shorts=(${shorts[@]} $1);
	
		elif echo $1 |grep -q -P '^\S\S+:?$'; then
			longs=(${longs[@]} $1);
	
		fi
		shift;
	done

	shift;

	shorts=${shorts[@]}			

	longs=${longs[@]}

	regex=${longs// /\|}
	regex=${regex//:/\\S*}

	same=${same[@]//:/}

	for option in "$@";do
		if echo $option|grep -q -P '^--';then

			echo $option|grep -q -P "^--($regex)\b"

			[ "$?" = "1" ] && echo "$MY_PRG: unrecognized option '$option'" && return 1;
		fi	
	done;

	regex=$(echo ${same}|sed -e 's: :/;s/\\<:g;s:|:\\>/:g;s:^:\\<:')
	
	args=($(getopt -l ${longs// /,} -o ${shorts// /,} -n $MY_PRG -s bash -- $@))
	
	[ "$?" = 1 ] && return 1;

	let index=0;

	while [ "${args[$index]}" != "--" ];do

		if [ ! -z "${args[$index]%%\'*}" ];then

	    	option=$(echo opt${args[$index]}|sed -e "s/$regex/;s/-\+/_/g")
	    	eval $option=1;
		else
			eval $option=${args[$index]//\'/}
	    fi

		let index+=1
	done	    
}


##---------------- main --------------------##

##-------------------------------------------##
function main(){
true;
}
#*********************************************#

## Some script wide variables
MY_PRG=`basename $0`
_DATE=`date +%y%m%d%H%M`

## Some global variables
declare _TMP;	## Holds temporary files for cleanup

## Valid command line options
Getopts \
	'h|help'\
	'v|version'\
	-- $@

[ "$?" = "1" ] && try_help;

[ ! -z $opt_help ] && Help;

[ ! -z $opt_version ] && version;

time main;
exit;
###################################################
## $Log$
###################################################