[@rollup/plugin-typescript] Plugin resolves asset filename to relative path

[tscpp]

• Rollup Plugin Name: @rollup/plugin-typescript
• Rollup Plugin Version: 8.3.1
• Rollup Version: 2.70.1
• Operating System (or Browser): Windows 11/Chrome
• Node Version: 16.13.1
• Link to reproduction: https://replit.com/@EliasSkogevall/rollup-plugin-typescript-repl-2

Expected Behavior

I except the JavaScript build files to be generated to dist/ and the Typescript declaration files to be generated to types/.

Actual Behavior

The plugin tries to outsmart me by resolving a relative path to the declaration output using the tsconfig's directory. However, this is a problem because:

1. the declarations will not end up where I told it to.
2. the asset output filename will be relative, which is not allowed.

Additional Information

Instead of resolving the path at all, as the error suggests ("must be strings that are neither absolute nor relative paths"), pass the output directory path as is.

./src/main.ts → ./dist/main.js...
[!] (plugin typescript) Error: The "fileName" or "name" properties of emitted files must be strings that are neither absolute nor relative paths, received "../types/main.d.ts".
Error: The "fileName" or "name" properties of emitted files must be strings that are neither absolute nor relative paths, received "../types/main.d.ts".
    at error (C:\Users\elias\Desktop\tscpp\rollup-plugin-typescript-repl\node_modules\rollup\dist\shared\rollup.js:198:30)
    at FileEmitter.emitFile (C:\Users\elias\Desktop\tscpp\rollup-plugin-typescript-repl\node_modules\rollup\dist\shared\rollup.js:15513:24)
    at C:\Users\elias\Desktop\tscpp\rollup-plugin-typescript-repl\node_modules\@rollup\plugin-typescript\dist\index.js:816:26
    at Array.forEach (<anonymous>)
    at C:\Users\elias\Desktop\tscpp\rollup-plugin-typescript-repl\node_modules\@rollup\plugin-typescript\dist\index.js:808:37
    at Array.forEach (<anonymous>)
    at Object.generateBundle (C:\Users\elias\Desktop\tscpp\rollup-plugin-typescript-repl\node_modules\@rollup\plugin-typescript\dist\index.js:806:37)
    at C:\Users\elias\Desktop\tscpp\rollup-plugin-typescript-repl\node_modules\rollup\dist\shared\rollup.js:22779:37

import typescript from '@rollup/plugin-typescript';

export default {
  input: './src/main.ts',
  output: {
    file: './dist/main.js',
    format: 'cjs',
  },
  plugins: [
    typescript({
      declaration: true,
      declarationDir: './types',
    }),
  ],
};

[tscpp]

As a workaround, you can specify declarationDir to the same same directory as the tsconfig and append /types.

typescript({
  tsconfig: 'src/mod1/tsconfig.json',
  declaration: true,
  // Output will be located at 'types/'
  declarationDir: 'src/mod1/types',
})

[stale]

Hey folks. This issue hasn't received any traction for 60 days, so we're going to close this for housekeeping. If this is still an ongoing issue, please do consider contributing a Pull Request to resolve it. Further discussion is always welcome even with the issue closed. If anything actionable is posted in the comments, we'll consider reopening it. ⓘ