prefetch-npm-deps: instrument some logging

use anyhow::{anyhow, bail, Context};

use lock::UrlOrString;

use log::{debug, info};

use rayon::prelude::*;

use serde_json::{Map, Value};

use std::{

    force_git_deps: bool,

    force_empty_cache: bool,

) -> anyhow::Result<Vec<Package>> {

    debug!("parsing lockfile with contents:\n{content}");

    let mut packages = lock::packages(content)

        .context("failed to extract packages from lockfile")?

        .into_par_iter()

        let path = dir.path().join("package");

        info!("recursively parsing lockfile for {} at {path:?}", pkg.name);

        let lockfile_contents = fs::read_to_string(path.join("package-lock.json"));

        let package_json_path = path.join("package.json");