Special loader for vite(st) environments

[pi0]

While this is not a direct purpose of jiti, when it is used in testing environments (unbuild dist in stub mode) we might need to detect vite environment and bypass transforms.

[pi0]

/cc @antfu If you have any ideas.

[antfu]

I image that we could have a magic comment in the stub file, and then with a Vite plugin to transform it back to a redirect. For example:

// @jiti-stub /path/to/source.ts

module.exports = jiti()('/path/to/source.ts')

export const jitiStubPlugin() {
	return {
      name: 'jiti:stub',
      transform(code, id) {
        if (!code.includes('@jiti-stub')) return
        const match = /REGEX/.match(code)
        return `export * from "${match[1]}"`
      }
    }
}

[pi0]

Do you think would it be possible to magically making jiti+vite working together out of the box without custom user/framework plugins?

[antfu]

I can't think of one at this moment (without changes in Vite core, which is unlikely to happen)

[pi0]

Can we detect vite environment in a reliable way or having an export condition by default in vite? This way i was thinking jiti instead can change it's internal behavior for vite(st) compatibility.

[justin-schroeder]

FWIW — Im able to get the tests to run fine in vitest using this little unplugin resolver i wrote (main issue was the file:// protocol doesnt seem to work in vite): https://github.com/justin-schroeder/unplugin-file-url

It works fine — the remaining issue is (in the context of a monorepo at least) making changes in stubbed packageA does not trigger vitest to re-run in the context of packageB/teststhat depend on the stubbedpackageA`