safe move/copy with incrementing filenames?

[Paul Archer]

So, I'm working on some DAM (digital asset management) scripts, and I want
to make sure that I don't overwrite any files when I move or copy them.
I was about to start working on a move method that would add a number to
the destination filename if the name already exists. (IE
mv('pma_20090720_1234.jpg', 'archive/2009/07') might create an
'archive/2009/07/pma_20090720_1234-1.jpg if pma_20090720_1234.jpg exists.)

Question: is there already a module that can do that?

Paul

 

[pharrington]

So, I'm working on some DAM (digital asset management) scripts, and I want
to make sure that I don't overwrite any files when I move or copy them.
I was about to start working on a move method that would add a number to
the destination filename if the name already exists. (IE
mv('pma_20090720_1234.jpg', 'archive/2009/07') might create an
'archive/2009/07/pma_20090720_1234-1.jpg if pma_20090720_1234.jpg exists.)

Question: is there already a module that can do that?

Paul

I've just been doing this:

def unique(filename)
count = 0
unique_name = filename
while File.exists?(unique_name)
count += 1
unique_name = "#{File.join(
File.dirname(filename),
File.basename(filename, ".*"))}_#{count}#{File.extname
(filename)}"
end
unique_name
end

there's probably a better way though