liquidsoap: reload playlist manually using external connection

radio.liq

settings.server.telnet.set(true)
settings.server.telnet.port.set(1234)
settings.server.telnet.bind_addr.set("0.0.0.0")

host   = "localhost"
port   = 8000
passwd = "passwd"
mount  = "/stream.mp3"

p           = playlist("radio.m3u", reload_mode="manual")
silence     = blank()
radio       = fallback(track_sensitive = false, [p, silence])
radio       = normalize(radio)

def reload_playlist(_) =
  log("Reloading playlist...")
  p.reload()
  "Reloading playlist..."
end

server.register("reload_playlist", reload_playlist)

output.icecast(
  %mp3(bitrate=128, samplerate=44100, stereo=true),
  host=host,
  port=port,
  password=passwd,
  mount=mount,
  name="radio",
  description="radio desc",
  genre="Various",
  url="http://radio.localhost",
  public=true,
  radio
)

radio.m3u

#EXTM3U

#EXTINF:120, Sample Video 1
a.mp4

#EXTINF:120, Sample Audio 1
a.mp3

to reaload playlist from bash:

echo "reload_playlist" | nc localhost 1234

to install netcat:

apt-get install netcat-traditional