How do I chdir in an exec?

[Nicholas Clark]

On Sun, Mar 08, 2009 at 09:10:46PM -0400, David Golden wrote:
> On Sun, Mar 8, 2009 at 4:21 PM, Michael G Schwern <schwern at pobox.com> wrote:
> > A simple solution to this problem would seem to be allowing exec (or a new
> > option) to return a filehandle in place of a command to run.
> >
> >  exec => sub {
> >      ...derive $sub_module, $command and $file...
> >
> >      chdir "ext/$sub_module";
> >      open my $fh, "-|", $command, $file;
> >      chdir "../..";
> >
> >      return $fh;
> >  }
> >
> > This gives the user complete control over the running of the test without
> > having to bail out to a separate script.
> 
> Unfortunately, not portable.  See perlport and open.

I think the solution to the portability issue is to subclass
TAP::Parser::Iterator::Process and provide setup() and teardown() methods to
do the directory changing.


As to the file handle proposal - that seems a useful addition to me, because
it's cleanly defined, and extensible in ways we've not yet thought of.
What am I missing?

Nicholas Clark