bundleSource emits a bundle when entrypoint does not exist

[kriskowal]

The following program should throw an error because bogus.js does not exist. Instead, it generates a bundle.

import '@endo/init';
import bundleSource from '@endo/bundle-source';
(async () => {
  const bundle = await bundleSource(new URL('bogus.js', import.meta.url).pathname);
  console.log(bundle);
})();

[warner]

BTW the "empty" bundle this creates has only a compartment-map.json, no other components. The map has a .compartments with all the packages cited as dependencies of the the package that would have contained the (bogus) entry point. It also has a broken entry for the missing file:

        "microtime": {
          "compartment": "microtime-v3.1.0",
          "module": "./index"
        },
        "semver": {
          "compartment": "semver-v6.3.0",
          "module": "./semver.js"
        },
        "./bogus.js": {
          "deferredError": "Cannot find file for internal module \"./bogus.js\" (with candidates \"./bogus.js\") in package file:///home/node/agoric-sdk/packages/SwingSet/"
        }

The broken bundle has bundle.endoZipBase64.length === 11320, in case you're testing and looking to distinguish between functional bundles and broken ones.

[kriskowal]

Coming soon to a release and integration near you.