You're right -- many parts of system-fileio (the parts based on "directory") are broken due to this. I'll need to update it to call the posix/win32 functions directly.
IMO, the GHC behavior in <=7.0 is ugly, but the behavior in 7.2 is fundamentally wrong. Different OSes have different definitions of a "file path". A Windows path is a sequence of Unicode characters. A Linux/BSD path is a sequence of bytes. I'm not certain what OSX does, but I believe it uses bytes also. In GHC <= 7.0, the String type was used for both sorts of paths, with interpretation of the contents being OS-dependent. This sort of works, because it's possible to represent both byte- and text-based paths in String. GHC 7.2 assumes Linux/BSD paths are text, which 1) silently breaks all existing code and 2) makes it impossible to fix within the given API. On Tue, Nov 1, 2011 at 08:48, Felipe Almeida Lessa <felipe.le...@gmail.com> wrote: > On Tue, Nov 1, 2011 at 5:16 AM, Ganesh Sittampalam <gan...@earth.li> wrote: >> I'm just investigating what we can do about a problem with darcs' >> handling of non-ASCII filenames on GHC 7.2. >> >> The issue is apparently that as of GHC 7.2, getDirectoryContents now >> tries to decode filenames in the current locale, rather than converting >> a stream of bytes into characters: http://bugs.darcs.net/issue2095 >> >> I found an old thread on the subject: >> http://www.haskell.org/pipermail/haskell-cafe/2009-June/062795.html and >> some GHC tickets (e.g. http://hackage.haskell.org/trac/ghc/ticket/3300) >> >> Can anyone point me at the rationale and details of the change and/or >> suggest workarounds? > > You could try using system-fileio [1], but by reading its source code > I guess that it may have the same bug (since it tries to decode what > the directory package gives). I'm CCing John Millikin, its > maintainer. > > Cheers, > > [1] > http://hackage.haskell.org/packages/archive/system-fileio/0.3.2.1/doc/html/Filesystem.html#v:listDirectory > > -- > Felipe. > _______________________________________________ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
