This file is indexed.

/usr/bin/mprev is in mpdtoys 0.25.

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The actual contents of the file can be viewed below.

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#!/usr/bin/perl
use strict;
use warnings;
use Audio::MPD q{0.19.0};

=head1 NAME

mprev - reverse the mpd playlist

=head1 SYNOPSIS

mprev [host]

=head1 DESCRIPTION

B<mprev> reverses mpd's playlist. That's all. The currently playing
song doesn't change. The song you heard last will be the next song to
play.

If the hostname is omitted, the MPD_HOST environment variable will be used.

=head1 AUTHOR

Copyright 2007 Joey Hess <joey@kitenet.net>

Licensed under the GNU GPL version 2 or higher.

http://kitenet.net/~joey/code/mpdtoys

=cut

if (@ARGV) {
	$ENV{MPD_HOST}=shift;
}

my $mpd=Audio::MPD->new(conntype => "reuse");
my $pl=$mpd->playlist;
my $current=$mpd->current;
if (! $current) {
	die "playlist seems to be empty\n";
}
my $pos=$mpd->current->pos;
my $id=$mpd->current->id;
my $past=0;
my @list=$pl->as_items;
foreach my $song (reverse @list) {
	if ($past) {
		$pl->moveid($song->id, $#list);
	}
	elsif ($id eq $song->id) {
		$past=1;
	}
	else {
		$pl->moveid($song->id, $pos++);
	}
}