Module migrate 

Code for migrating between Lockfile versions

Lock file versions are stored as the first line in the lockfile, of the form: # Lockfile vN where N is 1 or more digits.

Enums

LockfileVersion

All the lockfile versions

Functions

convert_lockfilev2_to_v3

convert_lockfilev3_to_v4

fix_up_v1_package_names