liquidsoap controller script

s.bash

#!/bin/bash -e
#
# s -- stream controller
#
# Usage:
#
#  s PLAYLIST    -- Switch to the specified playlist file. Starts liquidsoap if it isn't running.
#  s             -- Skip to a random track from the current playlist.
#  s stop        -- Shutdown liquidsoap
#

# Load environment variables:
#
# $LIQUIDSOAP
# $BASE_DIR
# $STREAM
# PIDFILE
source ./env

PLAYLIST="${BASE_DIR}/$1"

start_liquidsoap() {
	if [ -f $PIDFILE ] && ps -p $(cat $PIDFILE) &> /dev/null; then
		return
	fi
	echo "Liquidsoap does not appear to be running. Starting it..."
	$LIQUIDSOAP $LIQUIDSOAP_ARGS
	sleep 1
}

rebuild_playlist() {
  if [ -e $PLAYLIST ]; then
    name=$(basename -- "$1")
    name="${name%.*}"
    echo "Switching to [${name}] music..."
    unlink $STREAM
    ln -s $PLAYLIST $STREAM
    sleep 2
    skip
  else
    echo "File not found: $1"
  fi
}

skip() {
  echo 'Frog_Hat_Radio.skip'| nc -N localhost 1234 || echo "Could not contact liquidsoap. Is it running?"
  sleep 1
}

if [ "$1" = "stop" ]; then
	echo "Shutting down..."
	if [ -f $PIDFILE ]; then
		kill $(cat $PIDFILE)
	fi
else
	start_liquidsoap
	if [ "$1" ]; then
	  rebuild_playlist $1
	else
	  skip
	fi
fi