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

[Edward Kmett]

+1

On Thu, Nov 5, 2009 at 3:36 PM, Neil Mitchell <ndmitchell at gmail.com> wrote:

> 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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> >
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