Collin Donnell

I wrote myself this small template as a starting place for when I’m writing shell scripts. I just wanted something basic with enough structure to remind me how I like to do things. I thought maybe it would be helpful for other people who don’t write shell scripts too often but want to them to be nice when they do.

#!/usr/bin/env bash

# Uncomment for error handling
# set -e  # Exit immediately if a command exits with non-zero status
# trap 'echo "Error on line $LINENO"; exit 1' ERR
# trap 'echo "Script interrupted."; exit 130' INT

show_usage() {
  echo "Usage: $0 ..."
}

process_item() {
  local item="$1"
  echo "Processing '$item'"
}

main() {
  if [ $# -eq 0 ]; then
    show_usage
    exit 1
  fi

  # Your code here
  for var in "$@"; do
    process_item "$var"
  done
}

main "$@"