Hack:addrandom

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Use this bit of code to randomly add songs to what is currently playing. Anyone know how to adjust for weighted playlists?

• Code

!/bin/bash  
#evildick:04:24:2006  
mpddb=/var/lib/mpd/database  
addrandom() {  
tempfile=`tempfile 2>/dev/null` || tempfile=/tmp/temp$$  
trap "rm -f $tempfile" 0 1 2 5 15  
tempfile1=`tempfile 2>/dev/null` || tempfile1=/tmp/temp1$$  
trap "rm -f $tempfile1" 0 1 2 5 15  
sed 's/ /^/g' $mpddb > $tempfile  
getdbfile="$(cat $tempfile | grep file | cut -c 7-)"  
dbfile=($getdbfile)  
num_dbfile=${#dbfile[*]}  
echo "${dbfile[$((RANDOM%num_dbfile))]}" > $tempfile  
sed 's/\^/ /g' $tempfile > $tempfile1  
mpc add "$(cat $tempfile1)"  
}  
addrandom 

---

I made a similar script, the main difference is in how we select the songs (array vs. text file + tools), but I made mine so you can pass an integer argument to it and have it add that number of songs. But I have nothing for weighted playlists.

• Code

!/bin/bash  
# gunnihinn @ 19.11.2007  
hjalp ()  
{  
    echo "Usage: addRandom [OPTION]... [INTEGER]..."  
    echo "Adds INTEGER numer of randomly selected songs"  
    echo "to the current mpd playlist."  
    echo " "  
    echo "  -h,  --help            Display this help"  
}  
# Make sure the input argument is an integer.   
# Set number $num of songs to be added.  
if [ $# -eq 0 ]; then  
    hjalp  
    exit  
elif [ $1 = "--help" -o $1 = "-h" ]; then  
    hjalp  
    exit  
else  
    if [ `echo $1 | grep [^0-9]` ]; then  
	echo "Error: Argument not an integer. Exiting."  
	exit  
    else  
	num=$1  
    fi  
fi  
# Get all song file names in database.   
# We borrow a file in /tmp  
mpc listall > /tmp/songs.tmp  
numSongs=`wc -l /tmp/songs.tmp | sed "s/ \/tmp\/songs.tmp//"`   
if [ $numSongs -eq 0 ]; then  
    echo "Error: No songs in database."   
    rm /tmp/songs.tmp  
    exit  
fi  
# Add all songs if $num is too big  
if [ $num -gt $numSongs ]; then  
    num=$numsongs  
fi  
for (( i = 1; i <= $num; i++ ))  
do  
    songnr=`expr 1 + $RANDOM % $numSongs`  
    song=`cat /tmp/songs.tmp | head -n $songnr | tail -n 1`  
    # Don't add the same song twice, fix number of songs  
    mpc add $song && sed -i "\^$song^d" /tmp/songs.tmp && numSongs=`expr $numSongs - 1`  
done  
# Make it squeaky clean  
rm /tmp/songs.tmp 

---

I have a couple of oneliners.

The first one outputs single random song from mpd database:

• Code

!/bin/bash  
mpc listall | sed -n $[RANDOM % $(mpc stats | grep Songs | awk '{print $2}')+1]p 

The second one adds single random song from mpd database to playlist:

• Code

mpc_add_random: aliased to ~/bin/mpc_random | xargs -I{} mpc add {} 

Then you can add multiple random songs with something like this:

• Code

for i in `seq 100` ; do mpc_add_random ; done