truncate file names (using perl's rename)
cjwatson at ubuntu.com
Wed May 11 09:15:13 UTC 2005
On Wed, May 11, 2005 at 03:12:03PM +0900, toyfactory wrote:
> I'm sorry if this is not Ubuntu specific but...
> I'm trying to figure out an easy way to truncate filenames to a specific
> length while retaining the extension. I've been playing with regular
> expressions in Perl but, although I think I've figured out a way to do
> it, I've not quite got it working properly from the command line. In
> the meantime I discovered there's a rename command included with Perl.
> Can anyone save me an afternoon of unproductive Googling and head
> scratching and just tell me how to do it? For example:
> using 'rename <complicated regex here> *.txt'
You don't have to use a pure regex with rename; you only have to set $_
somehow. A single regex is often the hard way. For example, to truncate
the base of the filename to 13 characters as above, try:
rename 'my ($base, $ext) = /(.*)\.(.*)/;
$_ = substr($base, 0, 13) . ".$ext";' *.txt
Colin Watson [cjwatson at ubuntu.com]
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