sinkAppendFile usefule?

[angerman]

While experimenting with conduit, I found sinkFile, but had more use for an actual singAppendFile. Would a PR with that make sense?

sinkAppendFile :: MonadResource m
               => FilePath
               -> Consumer ByteString m ()
sinkAppendFile fp = sinkIOHandle (IO.openBinaryFile fp IO.AppendMode)

Another thing I noticed was that while I emitted bytestrings ending in a newline, somehow
the first line in my output file ended up being blank. Has anyone else observed this?

[snoyberg]

Yeah, that can definitely make sense, PR welcome.

I've never observed the newline behavior you describe, if you put together a repro, I can take a look.