Getopts - Bash Execution Replay

getopts reads short command-line flags one at a time. Scripts use it to turn options into named variables.

Program

Play the script to watch -v -t docs update verbose and target.

getopts.sh

#!/usr/bin/env bash

set -- -v -t docs
verbose=false
target="build"
while getopts "vt:" opt; do
  case "$opt" in
    v) verbose=true ;;
    t) target="$OPTARG" ;;
  esac
done
echo "$verbose:$target"

getopts `getopts` parses short flags such as `-v` and options with values such as `-t docs`.

OPTARG `OPTARG` holds the value attached to the current option.