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+3 A:

You could use a negative lookahead to do this:

"^/hg/(?!hgwebdir.cgi)(.*)"

http://www.regular-expressions.info/tutorial.html is a great tutorial for regular expressions. =)

Jens 2010-03-17 09:23:25

Thank you very much.

Tommy Jakobsen 2010-03-17 09:25:17

When looking up syntax for regexps, though, be sure to get your information for the correct regexp dialect! There are regexps in perl, java, .NET and many other languages/programs, and there are many small but significant differences. For example, the last time I needed a negative lookahead it was in vim, and the expression looked a lot different from what Jens wrote here.

Carl Smotricz 2010-03-17 09:31:07

@Carl: The site I linked covers some of the quirks of different regex implementations. Not vim, though =)

Jens 2010-03-17 09:40:58

To be sure, I wasn't contradicting you! I was just slapping an obligatory "here be dragons" sticker on the topic. I've occasionally been bitten by using the regexp syntax I'd learned from a different environment than the target, and wanted to save Tommy that same pain.

Carl Smotricz 2010-03-17 09:48:47

@Carl, good point. I had guessed that the rewrite module in question wouldn't support look-arounds. But after looking it up, I saw it did support look-aheads (not look-behind), so I added the link to Jens' answer.

Bart Kiers 2010-03-17 09:54:43

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RegEx, matching if not containing...

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