Re: [PATCH 2/4] Git.pm: Allow pipes to be closed prior to calling command_close_bidi_pipe

> From: Michal Nazarewicz <mina86@mina86.com>
> 
> The command_close_bidi_pipe() function will insist on closing both
> input and output pipes returned by command_bidi_pipe().  With this
> change it is possible to close one of the pipes in advance and
> pass undef as an argument.
> 
> This allows for something like:
> 
>   my ($pid, $in, $out, $ctx) = command_bidi_pipe(...);
>   print $out "write data";
>   close $out;
>   # ... do stuff with $in
>   command_close_bidi_pipe($pid, $in, undef, $ctx);