docker-build-and-run

#! /bin/bash
set -euf -o pipefail

path_to_abs() {
	case "$1" in
	./*) echo "$PWD/${1#./}" ;;
	/*)  echo "$1" ;;
	*)   echo "$PWD/${1}" ;;
	esac
}

D="$(dirname "$0")"
src_root="$(path_to_abs "$(dirname "$D")")"

show() {
	for i in "$@"; do
		i="${i/\'/\'\\\'\'/}"
		>&2 printf "'%s' " "$i"
	done
	>&2 printf "\n"
}

run() {
	>&2 printf "run: "
	show "$@"
	"$@"
}

pre_args=()
for i in "$@"; do
	if [ "$i" = "--" ]; then
		shift
		break
	fi
	pre_args+=("$i")
	shift
done

d_build() {
	docker build "$@" "$D"
}

dbus_vol=()
if [ -n "${DBUS_SESSION_BUS_ADDRESS:-}" ]; then
	dbus_vol+=(--env DBUS_SESSION_BUS_ADDRESS="$DBUS_SESSION_BUS_ADDRESS")
	case "$DBUS_SESSION_BUS_ADDRESS" in
	unix:path)
		dbus_path="${DBUS_SESSION_BUS_ADDRESS#unix:path=}"
		dbus_vol=(--volume "$dbus_path:$dbus_path")
		;;
	unix:abstract)
		;;
	*)
		>&2 echo "WARN: unrecognized DBUS_SESSION_BUS_ADDRESS=$DBUS_SESSION_BUS_ADDRESS"
		;;
	esac
fi

run d_build
run exec docker run \
	--user "$(id -u):$(id -g)" \
	--rm \
	--init \
	--volume "$HOME/.cargo:/cargo" \
	--env CARGO_HOME=/cargo \
	--volume "$(rustc --print sysroot):/rust:ro" \
	--volume "$src_root:/checkout:ro" \
	--volume "$src_root/target:/checkout/target" \
	${dbus_vol[@]+"${dbus_vol[@]}"} \
	--volume /run/dbus/system_bus_socket:/run/dbus/system_bus_socket \
	--workdir /checkout \
	${pre_args[@]+"${pre_args[@]}"} \
	"$(d_build -q)" \
	"$@"