Fail on declaration files which have no declare keyword

[zanminkian]

Your Environment

• Prettier version: 3.4.2
• node version: 22.11.0
• package manager: pnpm@9
• IDE: VScode

Describe the bug

This plugin will throw errors when the source code base contains a file below.

// foo1.d.ts
module "foo1" {
  const name: string;
  export default name;
}

To Reproduce

1. git clone [email protected]:zanminkian/bug-report.git and then checkout to branch prettier-plugin-sort-imports-bug
2. Read the README.md
3. pnpm i
4. ./node_modules/.bin/prettier ./src/foo1.d.ts -w: Failed!

Expected behavior

No errors

Screenshots, code sample, etc

See the repo.

Configuration File (cat .prettierrc, prettier.config.js, .prettier.js)

See the repo.

Error log

See the repo.

Contribute to @ianvs/prettier-plugin-sort-imports

• I'm willing to fix this bug 🥇

[zanminkian]

Repo to reproduce: https://github.com/zanminkian/bug-report/tree/prettier-plugin-sort-imports-bug

[fbartho]

I'm unfamiliar with a prettier.config that looks like this!

https://github.com/zanminkian/bug-report/blob/prettier-plugin-sort-imports-bug/prettier.config.js

What's going on here? At the minimum, I believe you want to specify our typescript version flag?

[fbartho]

(I'm mostly surprised by createRequire, I haven't used or tested that!)

[zanminkian]

I copied the config from my private project. I have updated the prettier.config.js:

export default {
  plugins: ["@ianvs/prettier-plugin-sort-imports"],
  // importOrderParserPlugins: ["typescript", "jsx", "decorators-legacy"],
};

It still fail. If I remove the plugins, all the things work well without errors. So I believe this is a bug belong to @ianvs/prettier-plugin-sort-imports.

[zanminkian]

BTW: running npx tsc in the reproduced repo works well. So a declaration file (*.d.ts) without declare keyword in it is valid for typescript.