Streaming stdout output does not play nice with the REPL

[caspervonb]

Start something that will write to stdout/stderr in a repl

$ deno
> setInterval(() => console.log(Math.random()), 1000);

And try to edit a line, not a good experience.

Problem is that rustyline does not give us any control of any kind of writer or access to the line buffer. So we can't do anything about it until kkawakam/rustyline#235 or a variant of it lands. Or we move away from rustyline, linefeed seems to handle this well.

[birkskyum]

This appear to be working just fine

➜ deno
Deno 1.36.3
exit using ctrl+d, ctrl+c, or close()
REPL is running with all permissions allowed.
To specify permissions, run `deno repl` with allow flags.
> setInterval(() => console.log(Math.random()), 1000);
1
> 0.7224430744736088
0.19093274494890866
0.3606157099202092
0.6114824936877588
0.26164013246656026
0.25243730793420793
0.6515413097477727
0.4563109364906546
0.30761606834885136
0.43871716136527295
0.7809966770570556
0.12405176850940203
0.05730388617238513
0.2977045017123099
0.10976879229705316
0.36901057434579365
0.4395197867030154
0.16751027296918908

[bartlomieju]

@birkskyum try writing some input when the interval is running - you'll see that the input is getting interleaved with the output.