Stream: ideas

Topic: LSP watch on imported Str/bytes

view this post on Zulip Dan G Knutson (Oct 12 2026 at 15:34):

I noticed that the LSP doesn't live-update if you make changes to an imported non-Roc file. For example, if I've got something (for an Advent of Code problem) like:

import "./input.txt" as puzzle_input : Str

Ok(parsed_input) =
    puzzle_input.trim().split_on("\n")
        .map_try(U64.from_str)

and then I edit input.txt to make it fail to parse, then the LSP only notices the change if I restart the LSP. The same goes for if the LSP was started when parsing was failing and then an edit to input.txt fixes the problem.

For advent of code, this is kind of silly (an error means the parsing is wrong). But in the long term, I'd like to handle assets in games like this, so it'd be really useful to have the LSP watch imported non-Roc files. Is this an appropriate GitHub issue?

view this post on Zulip Anton (Oct 12 2026 at 16:28):

Yeah, that would be nice to have :)

view this post on Zulip Dan G Knutson (Oct 12 2026 at 19:37):

issue created here:
https://github.com/roc-lang/roc/issues/12252

Last updated: Oct 15 2026 at 17:56 UTC