shell require dependency script

shell_require.sh

#!/bin/env bash
# shell require dependency script
#
# Usage:
#     require mvn git ...
#
# Author  : Chen, Hao (@haoch)
# Date    : Oct 24th, 2013

require(){
    success=true
    for i in $*
    do  
        echo -e -n "require $i - ".
        (which $i 1>/dev/null 2>/dev/null && echo -e "yes - `which $i`") || (echo "no - not found"&&exit -1) || success=false
    done

    if [ $success = false ];then
        echo -e "ERROR - some required dependencies are not found"                                                                                                             
        exit -1
    else
        echo -e "all required dependencies are found"
    fi  
}