in reply to
Better way?
This looks like a perl based rsync(1) kind of thing.
Unless I'm horribly wrong here, this is really not that ugly.
About the only thing ugly is the memory usage for the
various lists. That could get big, if the file lists are
long.
Yours is pretty easily understood code,
and unless it runs many many times a second,
should not be a huge problem.
But if you wanted to trim up the memory usage,
perhaps looking at
processing the lists sequentially, and storing
only exceptions would be better/faster/more elegant.
# assuming %existing_files is a hash of existing
# filenames and descriptions
# and we recieve the new list of files on stdin
while (<STDIN>) {
chomp;
if ($existing_files{$_}) {
delete $existing_files{$_};
}
else {
$existing_files{$}="Newly Added file $_";
}
}
# at this point %existing_files contains the files that
# should be deleted, and the newly added ones,
# with the description used to differentiate them
foreach (sort keys %existing_files} {
if ($existing{$_} =~ /^Newly/ ) {
print "Added $_;";
}
else {
print "Delete $_";
}
}
}
--
Jay "Yohimbe" Thorne, alpha geek for
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