[darcs patch] filepath: normalise trailing dot

[Conrad Parker]

On 17 February 2010 01:50, Neil Mitchell <ndmitchell at gmail.com> wrote:
> Hi Conrad,
>
> Your proposal seems sensible (+1). Although in the past some people
> complained about normalising away .'s being a bug in some corner
> cases, so if anyone can find one of them I withdraw my support.
>
> Creating a trac ticket is important so that the patch doesn't get lost.

Hi,

apologies for the high latency, here is a trac ticket:

http://hackage.haskell.org/trac/ghc/ticket/3975

Conrad.

>
> Thanks, Neil
>
> On Thu, Feb 11, 2010 at 8:22 AM, Conrad Parker <conrad at metadecks.org> wrote:
>> Hi,
>>
>> the attached darcs patch modifies the behaviour of normalise to handle
>> trailing dots in a path. The previous behaviour yielded this:
>>
>> Prelude System.FilePath> normalise "../."
>> "../."
>> Prelude System.FilePath> normalise ".././"
>> ".././"
>> Prelude System.FilePath> normalise ".././.."
>> "../.."
>>
>> This patch modifies dropDots such that the check for (".":[]) only
>> occurs once for the path, after which a driver function dropDots' is
>> used which skips this check. Hence "." can be removed from the end of
>> a longer path, but a path of just "." is unchanged.
>>
>> (my trac account is pending verification, I'll reply with a trac
>> ticket # later if needed)
>>
>> cheers,
>>
>> Conrad.
>>
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>
>