Re: [Haskell-cafe] Maintaining lambdabot

On Fri, Mar 15, 2013 at 4:31 PM, Jason Dagit wrote:

On Fri, Mar 15, 2013 at 3:30 PM, James Cook wrote:

...

On Mar 15, 2013, at 2:45 PM, Jason Dagit wrote:

...

I haven't been following the thread closely. Is there also a github? If so, where? Some of us figured out a bug fix for the quotes plugin and I'll send a pull request if I get a chance.

Yep, there is[1]. I'm not sure what the specific bug is that you are referring to, but it's possible it doesn't exist anymore - a large part of the quotes plugin has been rewritten (actually outsourced to a fortune-mod clone written in Haskell called "misfortune"). If it still does, then of course I'd be happy to accept a fix :)

[1] https://github.com/mokus0/lambdabot

Awesome.

I believe the bug is still there. The type for the quote db is: type Key = P.ByteString type Quotes = M.Map Key [P.ByteString]

Which leaves the possibility that a key exists but there are no quotes. This is problematic for the current version of random. I glanced at your new version and it wasn't clear to me if it's still a problem (I suspect it is). One bandaid for this is to change the lines below:

https://github.com/mokus0/lambdabot/blob/master/src/Lambdabot/Plugin/Quote.h...

https://github.com/mokus0/lambdabot/blob/master/src/Lambdabot/Plugin/Quote.h...

In both cases "Just qs" could be changed to "Just qs@(_:_)" and then empty lists would fall through to the default case.

The other fix is to prune out degenerate entries (where key maps to the empty list). I believe that would be fixed in the serialization function: moduleSerialize = Just mapListPackedSerial

Changing that to something like: moduleSerialize = Just mapListPackedSerialSansEmpties where mapListPackedSerialSansEmpties = mapListPackedSerial { serialize = (serialize mapListPackedSerial) . Map.filter (not.null) }

Perhaps that should be added to the Serial module as an alternative to mapListPackedSerial.

I haven't tested any of the above code (or even tried to compile it).

I was going to start making these changes and I noticed that it doesn't currently build with ghc 7.4.1 w/Haskell Platform: https://travis-ci.org/dagit/lambdabot/builds/5541375 Do you know if the constraints on: regex-posix-0.95.1 regex-compat-0.95.1 Need to be what they are? Could we relax them without breaking anything? Jason