#!/home/ben/software/install/bin/perl

# Delete old .xvpics directories containing misleading file names. The
# files are some kind of thumbnail format, but they are given names
# ending in .jpeg etc., which they don't actually contain those kinds
# of files.

use warnings;
use strict;
use utf8;
use FindBin '$Bin';

# Use "locate" to find the directories.

my @xvpicsdirs = `locate ".xvpics" | grep -v ".xvpics/" `;

for my $dir (@xvpicsdirs) {
    chomp $dir;
    # If we run this twice, the directories are all gone.
    if (! -d $dir) {
	next;
    }
    print "$dir\n";
    chdir $dir;

    my @files = <$dir/*>;
    for my $file (@files) {
	# Carefully delete only files which are thumbnail files.
	if ($file =~ /\.jpe?g$|\.gif$|\.png$/) {
	    unlink $file or die $!;
	}
	else {
	    print "Cannot remove $file\n";
	}
    }
    # If the above file deletion fails, due to non-thumbnail files in
    # the directory, the following won't accidentally delete the good
    # files, but instead print a directory not empty error, which is
    # what we want - we don't want to destroy the contents if the
    # directory contains anything useful.
    system ("rmdir $dir");
}