[Gllug] sed question: hyperlinking URLs

[Joel Bernstein]

On Wed, Jan 24, 2007 at 03:47:01PM +0000, J F wrote:
> I'm trying to write a sed command to pick out URLs in a file and turn them into an HTML hyperlink. I've come with this thus far:

Does it *have* to be sed? You can adapt the perl regex below to sed
format but it's nice to have a slightly terser format with character
class escapes. 

Does this do what you need?
jbernstein at bandicoot 16:03 ~ $ cat /tmp/foo
Visit www.google.com.
foo www.foo.com
jbernstein at bandicoot 16:03 ~ $ perl -ple
's{(www\.[\w\d]+\.[\w\.]*\w)}{<a href="$1">$1</a>}g' /tmp/foo
Visit <a href="www.google.com">www.google.com</a>.
foo <a href="www.foo.com">www.foo.com</a>

I can't see anything wrong with that for what you requested. 
I dare say somebody will manage to golf the regex down a little - the
key feature is the final \w (word character) to ensure you don't match
the trailing "."

/joel
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