fingertip-containerized

#!/bin/bash

set -ue

DISTRO=fedora:32
FINGERTIPDIR=$(realpath $(dirname "$0"))

if command -v podman > /dev/null; then
	BACKEND=podman
elif command -v docker > /dev/null; then
	BACKEND=docker
else
	echo "Neither podman or docker were found, sorry"
fi

EXTRA_OPTS=""
if [[ -n "${FINGERTIP_DEBUG+x}" ]] && [[ "$FINGERTIP_DEBUG" == 1 ]]; then
	EXTRA_OPTS="-e FINGERTIP_DEBUG=1"
fi

mkdir -p ~/.cache/fingertip

MARKER=$FINGERTIPDIR/.$BACKEND-build-marker
if [[ ! -e "$MARKER" ||  -n "$(find "$FINGERTIPDIR"/* -newer "$MARKER")" ]]
then
	echo "Trying to run $DISTRO with $BACKEND for starters..."
	if ! $BACKEND run -it $DISTRO true; then
		echo "$($BACKEND run -it $DISTRO true) fails, fix this"
		exit 1
	fi
	echo "Building a fingertip image for $BACKEND..."
	pushd "$FINGERTIPDIR"
	$BACKEND build -t fingertip .
	popd
	touch "$MARKER"
fi

echo "Trying a limited version of fingertip inside $BACKEND..."

# --device /dev/kvm didn't work out, so --privileged
exec $BACKEND run \
	--rm \
	--tmpfs /tmp:rw,size=6G \
	--volume "$(pwd):/cwd:z" \
	--volume "$FINGERTIPDIR:/containerized-fingertip:z" \
	--volume ~/.cache/fingertip:/user-home/.cache/fingertip:z \
	--label=false \
	--privileged \
	--userns=keep-id --user $(id -u):$(id -g) \
	$EXTRA_OPTS \
	-it fingertip \
	/usr/bin/python3 /containerized-fingertip "$@"