kubectl plugin to list failed pods

kubectl-failed

#!/bin/bash

usage() {
	echo "Usage: $0 [-A|-n <namespace>]"
	echo "    -A : act on all namespaces"
	echo "    -n <namespace>: pods for namespace <namespace>"
}

all=0
namespace=

while getopts "hAn:" OPTION; do
	case "$OPTION" in
		h)
			usage
			exit 0
			;;
		A)
			all=1
			;;
		n)
			namespace="$OPTARG"
			;;
		*)
			echo "Error: bad arguments" >&2
			exit 1
			;;
	esac
done
shift $((OPTIND - 1))

args="-o wide"

if [[ $all -eq 1 ]]; then
	args="$args -A"
elif [[ -n $namespace ]]; then
	args="$args -n $namespace"
fi

# shellcheck disable=SC2086 # we want splitting for $args
kubectl get pod --field-selector 'status.phase==Failed' $args