mpd2mqtt

Dockerfile

# https://docs.docker.com/get-started/part2/#define-a-container-with-a-dockerfile

# Use an official Python runtime as a parent image
FROM python:3-alpine

# Set the working directory to /app
WORKDIR /app

# Copy the current directory contents into the container at /app
ADD . /app

# Install any needed packages specified in requirements.txt
RUN pip install -r requirements.txt

# Run app.py when the container launches
CMD ["./mpd2mqtt.py"]

mpd2mqtt.py

#!/usr/bin/env python3

# DEBUG
import os
DEBUG = "DEBUG" in os.environ
print("Debugging: {} {}".format(DEBUG, "(You might want to set DEBUG.)" if not DEBUG else ""))

# connect to Sentry (pip3 install raven)
if not DEBUG:
    if "SENTRY_DSN" in os.environ:
        import raven
        raven = raven.Client(os.environ["SENTRY_DSN"])
        print("Connected to Sentry.")
    else:
        raven = None
        print("Didn't connect to Sentry. You might want to set SENTRY_DSN.")
else:
        raven = None
        print("Didn't connect to Sentry because DEBUG is set.")

def handle_status(playing):
    title = playing.get("title")
    artist = playing.get("artist")
    album = playing.get("album")
    if not artist and not album and title:
        if " - " in title:
            artist = title.split(" - ")[0]
            title = title.split(" - ")[1]
    if DEBUG:
        print("------------------------")
        print("Currently playing: {}".format(playing))
        print("Title: {}".format(title))
        print("Artist: {}".format(artist))
        print("Album: {}".format(album))
    mqtt.publish("music/title", title)
    mqtt.publish("music/artist", artist)
    mqtt.publish("music/album", album)
    mqtt.publish("music/source", "mpd")

def quit():
    print("Exiting...")
    mqtt.loop_stop(force=False)
    mpd.close()
    mpd.disconnect()

try:
    # connect to mpd (apt install python3-mpd)

    from mpd import MPDClient
    mpd = MPDClient()
    mpd.idletimeout = None
    mpd.connect("mpd", 6600)
    print("Connected to mpd: version {}".format(mpd.mpd_version))

    # connect to mqtt (pip3 install paho-mqtt)

    import paho.mqtt.client
    mqtt = paho.mqtt.client.Client()
    mqtt.connect("mqttserver")
    mqtt.loop_start()
    print("Connected to mqtt.")

    # SIGTERM
    import signal
    signal.signal(signal.SIGTERM, quit)

    try:
        while True:
            playing = mpd.currentsong()
            handle_status(playing)
            mpd.idle()
    except KeyboardInterrupt:
        quit()

except Exception as exc:
    if raven:
        raven.captureException()
    raise

requirements.txt

python-mpd2==0.5.5
paho-mqtt==1.3.0
raven==6.1.0