🐛 Parse error for jsonc files

[unional]

VS Code version

1.90.2

Extension version

2.3.0

Biome version

1.8.3

Operating system

• [ ] Windows
• [X] macOS
• [ ] Linux

Description

It seems like the extension is trying to parse jsonc files as json files.

Steps to reproduce

update biome from 1.7.3 to 1.8.3

Expected behavior

should work

Does this issue occur when using the CLI directly?

No

Logs

`Biome Trace` is empty

[ematipico]

It's very difficult to triage the issue without information.

Can you please at least share the contents of the file? Can you check if you can replicate the issue in the playground?

[unional]

Hi, since this is related to extension, probably can't repro it in the playground.

I think any repo using biome with jsonc file should able to repro it. e.g. https://github.com/repobuddy/repobuddy/tree/biome-jsonc

pnpm i and open a jsonc file should be sufficient.

[nhedger]

What does your editor detect the file as? Are you sure that you don't have some kind of mapping that tells VS Code that the .jsonc extension is a JSON file? I can't reproduce the issue when opening the recommended.jsonc file from your repo.

[unional]

What does your editor detect the file as? Are you sure that you don't have some kind of mapping that tells VS Code that the .jsonc extension is a JSON file? I can't reproduce the issue when opening the recommended.jsonc file from your repo.

That's strange. Are you on MacOS, and the extension shows that it is using biome 1.8.3?

I don't have setting that map jsonc to json. It is detected as jsonc

[unional]

I confirmed the issue also occurs in linux (wsl, ubuntu) and Windows 11.

I can repro it to other repo using biome. Only need to update it to 1.8.3 and reload vscode.

[ematipico]

I am sorry @unional, I tried it myself and I can't replicate the issue. So it's possible is something in your internal settings (probably in settings.json). Please provide a minimal reproduction.

[unional]

It is really weird. Another repo in the same system, same biome 1.8.3. And that works fine.

Will need to look deeper on what's causing it.

Pasting an image here for reference:

[ematipico]

I am going to close this, as we can't replicate it.

Again, I advise you to check your settings.json (project, workspace and user).

Feel free to open it again once you manage to provide a reproduction and some logs from the Daemon (instructions are attached to the template when you create the issue)

[unional]

I found out what the problem is.

biome parses json as jsonc by default.

Since that would causes false positives, my presets disable that by default:

{
  "json": {
    // `biome` treat `json` as `jsonc` by default.
    // That causes false positives and should be avoided.
    "parser": {
      "allowComments": false,
      "allowTrailingCommas": false
  }
}

https://github.com/repobuddy/repobuddy/blob/main/packages/biome/recommended.jsonc#L16-L20

Now the problem is, biome is not parsing json as jsonc by default. It is actually using the same parser to parse json and jsonc.

i.e. by doing "allowComments": false at the top level, I actually also turn off comment support for jsonc files.

IMO this is a bug.

As for why you don't get the error, it is because my top level biome.json is doing extends like this:

{
  "extends": ["@repobuddy/biome/recommended"]
}

You need to run pnpm install first to hook up the node_modules.

[ematipico]

Biome doesn't parse JSON files as JSONC files. Did you read this somewhere in our docs? However, some files get a particular treatment, which we document here: https://biomejs.dev/guides/configure-biome/#well-known-files

As for why you don't get the error, it is because my top level biome.json is doing extends like this

And that's why it's important to provide a reproduction.

Can you please provide a minimal reproduction? It's possible it is a bug, I haven't understood yet what's the issue and where it is.

[unional]

https://github.com/repobuddy/repobuddy/tree/biome-jsonc

here is the minimal repro. The top level biome.jsonc only has:

{
    "$schema": "./node_modules/@biomejs/biome/configuration_schema.json",
    "json": {
        // `biome` treat `json` as `jsonc` by default.
        // That causes false positives and should be avoided.
        "parser": {
            "allowComments": false,
            "allowTrailingCommas": false
        }
    }
}

and it fails by itself:

[ematipico]

That's not a minimal reproduction, that's a project. The reason why we ask for a minimal reproduction is because we can remove all the noise from a project, and make sure that there aren't other factors at play.

[unional]

https://github.com/cyberuni/biome-jsonc

[nhedger]

I can reproduce the issue seen in the screenshot using the reproduction repo, however I'm moving this to the main repo as it's not an issue with the extension.