prefetch-yarn-deps: Fix parsing of scoped packages

}

const downloadPkg = (pkg, verbose) => {

	const [ name, spec ] = pkg.key.split('@', 2);

	if (spec.startsWith('file:')) {

		console.info(`ignoring relative file:path dependency "${spec}"`)

	const fileMarker = '@file:'

	const split = pkg.key.split(fileMarker)

	if (split.length == 2) {

		console.info(`ignoring lockfile entry "${split[0]}" which points at path "${split[1]}"`)

		return

	} else if (split.length > 2) {

		throw new Error(`The lockfile entry key "${pkg.key}" contains "${fileMarker}" more than once. Processing is not implemented.`)

	}

	if (pkg.resolved === undefined) {

		throw new Error(`The lockfile entry with key "${pkg.key}" cannot be downloaded because it is missing the "resolved" attribute, which should contain the URL to download from. The lockfile might be invalid.`)

	}

	const [ url, hash ] = pkg.resolved.split('#')

{ testers, fetchYarnDeps, ... }:

{

  file = testers.invalidateFetcherByDrvHash fetchYarnDeps {

    yarnLock = ./file.lock;

    sha256 = "sha256-BPuyQVCbdpFL/iRhmarwWAmWO2NodlVCOY9JU+4pfa4=";

  };

  simple = testers.invalidateFetcherByDrvHash fetchYarnDeps {

    yarnLock = ./simple.lock;

    sha256 = "sha256-FRrt8BixleILmFB2ZV8RgPNLqgS+dlH5nWoPgeaaNQ8=";

# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.

# yarn lockfile v1

"@org/somepack@file:vendor/orgpacks/somepack/assets":

  version "1.0.0"

"otherpack@file:vendor/otherpack":

  version "1.0.0"