Support `import.meta.url` and `require.resolve`

[naugtur]

Use-cases

The goal of this is to collect requirements for the feature

import.meta.url

• resolving relative paths to non-code files of the same package (data or reading version from package.json)
• creating a require function and shimming paths

const require = createRequire(import.meta.url);
__dirname = fileURLToPath(import.meta.url);

• workers, loaders etc. - situations where code files URLs need to be known

const LOADER = new URL('shared-worker-loader.js', import.meta.url);

require.resolve

• resetting require cache

delete require.cache[require.resolve('../src/sha3.js')];

Requirements

import.meta

running from live filesystem (loadLocation)

running form bundle/archive

require.resolve require.cache

running from live filesystem (loadLocation)

running form bundle/archive

Work

• [ ] #1141
• [ ] #1144

[kriskowal]

See: https://github.com/endojs/endo/issues/291

[kriskowal]

I’ll note that import.meta.resolve is now specified to be synchronous, which we can support because we know where all the dependency packages are before we run JS.