Limited Source map generation

[pjebs]

Description

This is related to #19186 (as an alternative solution to that proposal).
Source Maps are too large for analysis in production during production. (I know it's not the normal way)

Vite should have an option to generate a very limited source map.
The ability for it to record ONLY the original filename of files in a limited set of directories. (No line numbers, character positions etc).

The intention is to analyse stack traces.

Suggested solution

Limited Source maps

Alternative

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[pjebs]

I'm not talkign about ignoreList etc: https://developer.chrome.com/docs/devtools/x-google-ignore-list to hide it during debugging in the browser.

I'm talking about reducing the filesize of the sourcemap file itself by REMOVING that information.

One solution from source map:

1. Remove sourceContent key
2. Remove sources for irrelevant files
3. Remove line number and position mapping data (if not possible, make it all line 0, character 0 for each source file)

[hi-ogawa]

There was a related discussion about avoid generating source maps for node_modules #17923 (comment).

I think this is somewhat possible from a plugin by manipulating mappings for selected files. Here is an example to force empty mappings for some files https://stackblitz.com/edit/vitejs-vite-xxt3g3ph?file=vite.config.ts (it should be tested locally as stackblitz's browser source map seems not working).

export default defineConfig({
  build: {
    sourcemap: true,
  },
  plugins: [
    {
      name: 'remove-source-map',
      enforce: 'post',
      transform(code, id, options) {
        if (id.endsWith('b.js')) {
          return { code, map: { mappings: '' } };
        }
      },
    },
  ],
});