How to pipe two Proc::Asyncs

[AlexDaniel]

The docs on Proc have a nice example:

my $p1 = run 'echo', 'Hello, world', :out;
my $p2 = run 'cat', '-n', :in($p1.out), :out;
say $p2.out.get;

We should provide the same thing for Proc::Async.

See also: https://irclog.perlgeek.de/perl6/2017-09-25#i_15213849

[zoffixznet]

This seems to work:

my $proc1 = Proc::Async.new: "cal"; my $proc2 = Proc::Async.new: «perl6 -e "slurp.uc.put"»; $proc2.bind-stdin: $proc1.stdout: :bin; await $proc1.start, $proc2.start

The .bind-stdin, .bind-stdout (and .bind-stderr) methods don't appear to be documented, but are featured in master roast.

[AlexDaniel]

I think this was resolved in db2e07b.

There's a separate issue for undecumented .bind-* methods: #1470