Node Package Importer can't find ESM entry point if args are provided

[jamesnw]

Currently, it appears that an entryPoint is only found if argv has exactly 2 arguments.

I'm observing this in a Vite project, with the css key in vite.config.ts setting up the package importer using the legacy API-

css: {
    preprocessorOptions: {
      scss: {
        includePaths: [path.resolve('./src/sass/')],
        pkgImporter: new NodePackageImporter(),
      },
    },
  },

Running yarn vite works, but yarn vite dev fails with the The Node package importer cannot determine an entry point because require.main.filename is not defined. error. Stepping through sass.dart.js in the debugger, I can see that the value of process.argv contains 3 values, and so if (process.argv case [_, String path]) does not match.

We have worked around this issue by providing "." as an entry point to the NodePackageImporter.

[ntkme]

I think it's as easy as

-  } else if (process.argv case [_, String path]) {
+  } else if (process.argv case [_, String path, ...]) {