deno lint doesn't try to read CSS files, it's only meant for JS/TS/JSX/TSX files.

Could you please paste an output from your terminal?

@bartlomieju Yeah sure, here it is

➜  project git:(6ef580b) deno lint .
error: The module's source code could not be parsed: Expected ';', '}' or <eof> at file:///Users/viktor/repos/project/packages/ui/globals.css:5:13

  @layer base {
              ~

Maybe that's happening because the deno.jsonc file at this package exports the globals.css file. When i delete it, this stops happening.

Can you please paste the contents of deno.jsonc file?

Something that could maybe be causing problems here is that, this package includes both a deno.jsonc file and a package.json file. I included the deno.jsonc just because without it deno could not find the types of the package being imported. (I have another issue related to that tho, #26306 )

{
  "name": "@project/ui",
  "exports": {
    "./lib/utils.ts": "./src/lib/utils.ts",
    "./hooks/use-toast.ts": "./src/hooks/use-toast.ts",
    "./components/alert-dialog.tsx": "./src/components/alert-dialog.tsx",
    "./components/avatar.tsx": "./src/components/avatar.tsx",
    "./components/badge.tsx": "./src/components/badge.tsx",
    "./components/button.tsx": "./src/components/button.tsx",
    "./components/command.tsx": "./src/components/command.tsx",
    "./components/dialog.tsx": "./src/components/dialog.tsx",
    "./components/drawer.tsx": "./src/components/drawer.tsx",
    "./components/form.tsx": "./src/components/form.tsx",
    "./components/input.tsx": "./src/components/input.tsx",
    "./components/label.tsx": "./src/components/label.tsx",
    "./components/separator.tsx": "./src/components/separator.tsx",
    "./components/spinner.tsx": "./src/components/spinner.tsx",
    "./components/switch.tsx": "./src/components/switch.tsx",
    "./components/table.tsx": "./src/components/table.tsx",
    "./components/tabs.tsx": "./src/components/tabs.tsx",
    "./components/toast.tsx": "./src/components/toast.tsx",
    "./components/toaster.tsx": "./src/components/toaster.tsx",
    "./components/tooltip.tsx": "./src/components/tooltip.tsx",
    "./postcss.config.mjs": "./postcss.config.mjs",
    "./tailwind.config.ts": "./tailwind.config.ts",
    "./globals.css": "./globals.css"
  }
}

As a workaround, disabling the no-slow-types rule might fix the issue:

// deno.jsonc
{
  "lint": {
    "rules": {
      "exclude": ["no-slow-types"]
    }
  },
  // ...
}

Probably what's happening here is that lint rule is analyzing all the exports of the package.

As a workaround, disabling the no-slow-types rule might fix the issue:

// deno.jsonc
{
  "lint": {
    "rules": {
      "exclude": ["no-slow-types"]
    }
  },
  // ...
}

Probably what's happening here is that lint rule is analyzing all the exports of the package.

Still happens with no-slow-types disabled

This is also a bug with deno fmt. I have a workspace setup where I have this fmt config:

  "fmt": {
    "include": ["*.ts", "*.tsx"],
    "exclude": ["*.d.ts", "./server/*"],
    "lineWidth": 120
  },

This still tries to process JS, CSS and even JSON files. However, when I also exclude the directory which contains those files (my Next JS build directory), it works fine. The include statement just shouldn't work with those files to begin with.

I was able to reproduce it with these three files:

// deno.json
{
    "name": "@project/ui",
    "exports": {
        "./main.ts": "./main.ts",
        "./globals.css": "./globals.css"
    }
}

// main.ts

// globals.css
body {
    color: "red";
}

Run deno lint:

error: The module's source code could not be parsed: Expected ';', '}' or <eof> at file:///Users/ib/dev/scratch_lint_css/globals.css:1:6

  body {
       ~

Indeed adding lint.exclude doesn't make the problem go away. Removing main.ts from "exports" makes the error go away.

I'll dig into this

Found one more problem that might be a separate issue. Running deno lint <some file> in the project from the above comment always triggers this error, even though it should only lint one specific file.