!fd stdin

[mcandre]

Expose stdin, just like stdin and stderr, through to CloudABI YAML configuration files, so that REPL programs can be built with CloudABI.

Workaround for UNIX hosts:

%TAG ! tag:nuxi.nl,2015:cloudabi/
---
console_out: !fd stdout
console_err: !fd stderr
console_in: !file
    path: /dev/tty

[EdSchouten]

Maybe we want to add cloudabi-run -f <configuration> <executable> as an alternative syntax to launch processes? When using -f, we could permit the use of !fd stdin. Feel free to send a pull request!

[mcandre]

-f <path> is a more natural syntax than <, and provides for more portable shell snippets (some non-bash shells may use different redirection syntaxes).