BASH Script template

scripttemplate.sh

###
###  Usage: blah [<options>]
###
###   Description of the script
###
###  Options:
###   -f --flag
###      Description of the flag
###   -o --option <arg>
###      Description of the option and argument
###  Examples:
###    blah
###    blah --option <blah>
###

# Quick usage printout
if [ $# -eq 0 ]; then
  echo "Usage: `basename $0` flag option"
  exit 65
fi

# Defaults
FLAG=0
OPTION=""

# Command-line options
while /bin/true; do
  CURRARG=$1
  case $CURRARG in
    "--flag" | "-f")
      FLAG=1
      ;;  
    "--option" | "-o")
      OPTION="$2"
      shift
      ;;  
    "-"*)
      echo "Error: Unrecognized option $CURRARG"
      grep "^###" $0 | sed -e 's/^###//'
      exit 1
      ;;  
    *)  
      break
      ;;  
  esac
  shift
done

# Main script body