This patch adds validation to the version pasing logic (parseVersion) to
not allow packages to be registered which apt wouldn't accept anyway.
It then propogates validation errors through CompareVersions, the way
in which parseVersion gets called, so that appropriate decisions can be
made.
New packages with invalid versions are not accepted.
For any pre-exisiting packages with invalid versions, as much care is
taken as possible to log warnings, and not use those packages.
This PR is loosely bnased on one by by Aaron Foster
<afoster@cloudflare.com> though it has largely been written at this
point.
Signed off with internal and external emails for clarity, but commit
is under personal email where we typically do open source contributions
from.
Signed-off-by: Phil Dibowitz <pdibowitz@cloudflare.com>
Signed-off-by: Phil Dibowitz <pdibowitz@ipom.com>
When performing an *aptly snapshot pull*, users might list dependency
versions that can potentially match multiple packages in the source
snapshot. However, the current implementation of the 'snapshot pull'
command only allows one package to be pulled from a snapshot at a time
for a given dependency.
The newly implemented all-matches flag allows users to pull all the
matching packages from a source snapshot, provided that they satisfy the
version requirements indicated by the dependencies.
The all-matches flag defaults to false and only produces the described
behaviour when it is explicitly set to true.