Re: [RFC 1/4 v2] Implement a basic remote helper for svn in C.

> > Generally I like your prefered solution.
> > I think there's one problem:
> > The pipe needs to be created before the fork, so that the fd can be
> > inherited. 
> The relevant pipe already exists at that point: the remote helper's
> stdin.
> 
> In other words, it could work like this (just like the existing demo
> code, except adding a conditional based on the "capabilities"
> response):
> 
>         0. transport-helper.c invokes the remote helper.  This requires
>            a pipe used to send commands to the remote helper
>            (helper->in) and a pipe used to receive responses from the
>            remote helper (helper->out)
> 
>         1. transport-helper.c sends the "capabilities" command to decide
>            what to do.  The remote helper replies that it would like
>            some feedback from fast-import.
> 
>         2. transport-helper.c forks and execs git fast-import with input
>            redirected from helper->out and the cat-blob fd redirected
>            to helper->in