Add run script and readme

README.md

@@ -0,0 +1,19 @@
+# *osu!lazer* in docker
+
+## How to use
+
+Place `run.sh` in a directory of your choice. On first run, the directories
+`data` and `import` will be created.
+
+To import a beatmap, place it in the `import` directory, open a graphical file
+manager and drag-and-drop the file into *osu!*.
+
+## Known Bugs
+
+ * *osu!* shows `Couldn’t list input devices. Is libasound2-dev installed?` at
+   startup. Fixing this requires installing `libasound2-dev` in the runtime
+   container and mounting `/dev/snd` in the container. This is not done as this
+   container is intended to be used with PulseAudio (which works).
+
+<small>This is not an official product by ppy Pty Ltd. *osu!* is a registered
+trademark by ppy Pty Ltd.</small>

run.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+function set_latency_offset() {
+	if [ $# != 1 ]; then
+		return 1
+	fi
+	echo "Set latency offset to $1 µs" >&2
+	pactl set-port-latency-offset alsa_card.pci-0000_00_1b.0 analog-output-headphones $1
+}
+
+set_latency_offset -40000
+trap "set_latency_offset 0" SIGINT SIGTERM EXIT
+
+BASEDIR="$(dirname $(realpath -s $0))"
+
+mkdir -p "$BASEDIR/data" "$BASEDIR/import"
+
+docker run \
+	--rm \
+	-it \
+	--name osu \
+	-e DISPLAY \
+	-e PULSE_SERVER=/run/user/$(id -u)/pulse/native \
+	-e PULSE_COOKIE=/run/pulse/cookie \
+	--device /dev/dri \
+	--group-add $(getent group video|cut -d: -f3) \
+	--group-add $(getent group audio|cut -d: -f3) \
+	-v /tmp/.X11-unix:/tmp/.X11-unix \
+	-v /run/user/$(id -u)/pulse/native:/run/user/$(id -u)/pulse/native \
+	-v "$HOME/.config/pulse/cookie:/run/pulse/cookie" \
+	-v "$BASEDIR/data/:/home/osu/osu/" \
+	-v "$BASEDIR/import/:$BASEDIR/import/" \
+	r.sbruder.de/osu \
+	$@