Refactor runner iteration into a function

}

find_name() {

	iter_configs && return

	case $? in

		1)

			echo >&2 "No free config slots found with ${NAME}"

			;;

		2)

			echo >&2 "Config already exists: ${RUNNER_CONFIG}"

			echo >&2 "(with name: ${NAME})"

			;;

	esac

	exit 1

}

# Iterate through runners until MAX_INDEX is reached or a runner is missing,

# eval-ing any code from arguments on each one.

#

# After return the values set by set_name will be for the most recent runner 

# tried: either the runner specified by MAX_INDEX, the first missing runner, or 

# any runner that causes eval-ed code to error or return.

#

# Unless eval-ed code causes it to be otherwise: returns 0 if a non-existant 

# runner config is tried; returns 1 if MAX_INDEX is passed; returns 2 if NAME 

# has no formatting mark for an index and the runner it refers to exists.

iter_configs() {

	local index=0

	[[ -v NAME ]] || NAME=$DEFAULT_NAME

	if [[ $(printf "${NAME}" 1) = $(printf "${NAME}" 2) ]]; then

		# No formatting marks in NAME

		set_name

		if [[ -e ${RUNNER_CONFIG} ]]; then

			echo >&2 "Config already exists: ${RUNNER_CONFIG}"

			echo >&2 "(with name: ${NAME})"

			exit 1

		fi

		return

		[[ -e ${RUNNER_CONFIG} ]] && return 2 || return 0

	fi

	while let "++index <= ${MAX_INDEX-99}" && set_name $index; do

		[[ -e ${RUNNER_CONFIG} ]] || return 0

		eval "$*"

	done

	echo >&2 "No free config slots found with ${NAME}"

	exit 1

	return 1

}

container_new() {