framework.bash

#!/bin/bash                                                                                                                  
                                                                                                                             
log() { echo $(date): $* ; }              #logs date and message to stdout
die() { log $* 1>&2 ; usage ; exit 1 ; }  #logs error message to stderr and exits
                                          
usage() {                                 #logs usage info to stderr
cat <<EOF 1>&2                                                                                                               
Usage: $0 [OPTION]...                                                                                                        
  -a          this option adds bunnies                                                                                       
                                                                                                                             
EOF                                                                                                                          
}                                                                                                                            
                                                                                                                             
log "We're going to doSomething"                                                                                             
doSomething || die "doSomething failed"                                                                                      
doSomethingElse || die "doSomethingElse failed"