Proposal: System.FilePath: current directory should be ".", not ""

[Neil Mitchell]

I agree with the idea behind this proposal, but am pretty sure it will
break quite a few filepath things that I maintain. So +1, but also +1
for a really strong release announcement and version bump.

The problem with filepaths is that they lack much structure, and are
very system dependent - meaning every change will break something. A
lovely abstract type would be wonderful, but no one has yet released
such a library on hackage...

Thanks, Neil


2009/11/4 Duncan Coutts <duncan.coutts at googlemail.com>:
> On Wed, 2009-11-04 at 10:00 +0000, Simon Marlow wrote:
>
>> I've amended the patch as suggested above, it turned out to be not too
>> hard.
>
> [..]
>
>> Neil's comprehensive test suite still passes with the new patch.
>>
>> Ticket, with new patch attached:
>>
>>    http://hackage.haskell.org/trac/ghc/ticket/2034
>>
>> The discussion deadline has long passed, so I propose we have another 2
>> weeks (18 November).
>
> I support this new proposal.
>
>
> To summarise for people who have not been paying full attention:
>
> Currently:
>        takeDirectory "Main.hs"  =  ""
>
> Proposed:
>        takeDirectory "Main.hs"  =  "./"
>
> The purpose being that one can always take the directory and get a valid
> path to use with a file system function, eg createDirectory.
>
>
> Unchanged behaviour:
>
>        "./" </> "Main.hs"  =  "./Main.hs"
>
> It was initially proposed that </> eat "./" on the left hand side but
> the current proposal leaves the behaviour of </> unchanged.
>
> Duncan
>
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