Re-Archive feature request

[cgmartin]

Thanks for sharing your work. It has proven to be very useful for speeding up my CI pipeline.

Some background - My development CI process currently works like this:

1. npm-cache install npm                  # Install (hopefully from cache)
2. npm update                             # Update any new dependencies from last cache
3. npm-cache install --forceRefresh npm   # Re-archive the dependencies

In my package.json some of my internal project dependency versions are set to "latest" (it's continuous delivery-related decision...). Since the cache is keyed to a hash of the package.json file itself and not the latest versions of each dependencies, I need to run an update after the initial install to pick up any changes from the first cache.

It would be great if I could do this all in one shot. Something like an: npm-cache update npm, where upon a cache-hit, it extracts, runs update, then re-archives (otherwise on cache-miss, just install as normal).

Or instead/additionally, a new command like npm-cache rearchive npm would be helpful in speeding up my step 3 (I don't need to actually run an install again, only need to cache it).

I might be missing an undocumented feature, but wanted to ask about this regardless. Thanks again!