functions.sh

function is_in_array {                          
    # Return 0 if element is found, 1 if not    
    if [[ $# -lt 2 ]]; then                     
        echo "Usage: $FUNCNAME string array" >&2
    else                                        
        local element=${1} i=""                 
        shift                                   
        declare -a list=$@                      
        for i in ${list[@]}; do                 
            if [[ $i == $element ]]; then       
                return 0                        
            fi                                  
        done                                    
    fi                                          
    return 1                                    
}                                               
                                                
function check_settings {                                           
    # Receive an array of vars and fails if one is unset            
    local required_settings=$@                                      
    local setting="" return_code=0                                  
    for setting in ${required_settings[@]}; do                      
        if [[ -z "${!setting}" ]]; then                             
            echo "Error! ${setting} must be specified!" >&2
            return_code=1                                           
        fi                                                          
    done                                                            
    return ${return_code}                                           
}