#!/usr/bin/bash

# Dependencies:  Dialog.  eg 'dnf install dialog'

AWK_EXE=$(/usr/bin/which awk)
DIALOG_EXE=$(/usr/bin/which dialog)
GREP_EXE=$(/usr/bin/which grep)
HOSTNAME_EXE=$(/usr/bin/which hostname)
PODMAN_EXE=$(/usr/bin/which podman)
SORT_EXE=$(/usr/bin/which sort)
SUDO_EXE=$(/usr/bin/which sudo)

# get a formatted container/image list for the dialog box
CONTAINERS=$( ${SUDO_EXE} ${PODMAN_EXE} ps \
				| ${GREP_EXE} -v "CONTAINER ID" \
				| ${AWK_EXE} '{ printf ("%s %s\n", $12 , $2)}' \
				| ${SORT_EXE} \
				| ${AWK_EXE} '{printf ("%s %s ", $1, $2)}'
			)

exec 3>&1
ID=$( ${DIALOG_EXE} --title "Attach to a container" \
		--menu "Choose a container" 19 60 10 $CONTAINERS \
		2>&1 1>&3 
	)
retval=$?
exec 3>&-

THIS_HOST=$(${HOSTNAME_EXE} -s)

if [ $retval -eq 0 ]; then
	clear
	echo -e "------------------------------------------------------------------------------"
	echo "Spawning new shell in ${ID} ('exit' or ^d to return to ${THIS_HOST})."
	echo -e "------------------------------------------------------------------------------\n"
	${SUDO_EXE} ${PODMAN_EXE} exec -it ${ID} bash
	echo -e "\n------------------------------------------------------------------------------"
	echo -e "Welcome back to ${THIS_HOST}"
	echo -e "------------------------------------------------------------------------------\n"
fi