make poetry install work offline in a hermetic/network-isolated build environment

[harshitbansal184507]

Hi,

I've been trying to make poetry install work offline in a hermetic/network-isolated build environment and hit a wall. Tried three things:

1)Pre-populated Poetry's artifact cache with correct paths, but Poetry still makes a network call before checking the cache for PyPI packages.
2)Rewrote poetry.lock with file:// URLs, failed because requests doesn't support file:// scheme.
3)Injected real HTTPS URLs into poetry.lock and pre-populated cache, tested live with network blocked, _download_link in executor.py still went straight to network and ignored the cache completely.

Am I missing something or there is no support around offline installs ?

[radoering]

As far as I know, we have never tried to support offline installs.

I assume we would prefer to avoid unnecessary network requests if someone were to take the time to check whether they are necessary or could be avoided with a pre-populated cache, since they are likely to slow down the installation.