[clug] Help with a python regexp?

[Francis Whittle]

Or, of course, I could be entirely wrong.

(?<!exchange.idl) is likely your winner :)

On Sun, 2009-02-22 at 08:51 +1100, Francis Whittle wrote:
> The way I'd do it in Perl would be to match a parenthesised exchange.idl
> at the beginning of the line and discard if the parenthesis match, well,
> matched.
> 
>         if(m/^(exchange.idl)?.*warning[: ].*/ && $1 eq ''){
>           #do stuff
>         }
> 
> You'd then be able to just add in exclusions to the paren match....
> Now I've done barely any python ever but if it does regular expressions
> in a Perl or POSIX way (doesn't it do the later?) it should be much
> similar.
> 
> If you want to stick to only the regexp, you'd need some way of matching
> _not_ the first bit.  This is tricky as exclusions are defined one
> character at a time.
> 
> On Fri, 2009-02-20 at 21:08 +1100, Brad Hards wrote:
> > Hi,
> > 
> > I've been playing with buildbot (http://buildbot.net:80/trac), and I've run 
> > into a problem. 
> > 
> > A bit of background first. One of the thing that happens with the compile step 
> > is that it extracts the warnings messages from the rest of stdout.
> > So given this:
> > http://colo1.frogmouth.net:8010/builders/full-centos52/builds/109/steps/compile/logs/stdio
> > it pulls out:
> > http://colo1.frogmouth.net:8010/builders/full-centos52/builds/109/steps/compile/logs/warnings
> > 
> > The method to do that looks like this:
> > 
> >     def createSummary(self, log):
> >         self.warnCount = 0
> > 
> >         if not self.warningPattern:
> >             return
> > 
> >         wre = self.warningPattern
> >         if isinstance(wre, str):
> >             wre = re.compile(wre)
> > 
> >         # Check if each line in the output from this command matched our
> >         # warnings regular expressions. If did, bump the warnings count and
> >         # add the line to the collection of lines with warnings
> >         warnings = []
> >         for line in log.getText().split("\n"):
> >             if wre.match(line):
> >                 warnings.append(line)
> >                 self.warnCount += 1
> > 
> > The warningPattern is (by default) is
> >     warningPattern = '.*warning[: ].*'
> > 
> > The problem is that I can't fix some of the warnings. Basically, all those 
> > lines that start with "exchange.idl" are hiding the real compile warnings.
> > 
> > I don't want to hide the lines in a normal build (e.g. by piping 
> > to /dev/null), only filtering on the buildbot. Hacking the method is a 
> > possibility, but I'd prefer to just have a better regexp.
> > 
> > So how to I match a line containing "warning:", as long as it doesn't start 
> > with "exchange.idl"?
> > 
> > All help much appreciated
> > 
> > Brad
>