This allows us to later increase the pool for well-formed versions without requiring
moving the catalog's data.json into a new folder, which would require re-syncing
the entire catalog.
It's now back to returning 10000 for "1.0.0", as it was before
the recent changes to allow for wrapped package version numbers
and prerelease versions. Given that there are other constants
in the cost function used in the constraint solver, this gives
us much more confidence that we haven't fundamentally changed
the behavior of `meteor add` or `meteor update` in 0.9.3.
The semver library's compare functions already did the right thing,
but our `PackageVersion.versionMagnitude` did not. It now almost
correctly works for prerelease versions with a few caveats described
in a [* XXX!] comment.
While at it, add many tests which caught a separate bug due to
adding a number to a string for versions such as "1.2.3_50".
(That version would have been chosen over "5.0.0"!)
Drop the "at-least" constraint type entirely. It was not user-accessible
and was only used in the form ">=0.0.0" to represent a constraint with
no version constraint at all. This type of constraint is now called
"any-reasonable".
The definition of "any-reasonable" is:
- Any version that is not a pre-release (has no dash)
- Or a pre-release version that is explicitly mentioned in a TOP-LEVEL
constraint passed to the constraint solver
For example, constraints from .meteor/packages, constraints from the
release, and constraints from the command line of "meteor add" end up
being top-level.
Why only top-level-constrained pre-release versions, and not versions we
find explicitly desired by some other desired version while walking the
graph?
The constraint solver assumes that adding a constraint to the resolver
state can't make previously impossible choices now possible. If
pre-releases mentioned anywhere worked, then applying the constraints
"any reasonable" followed by "1.2.3-rc1" would result in "1.2.3-rc1"
ruled first impossible and then possible again. That's no good, so we
have to fix the meaning based on something at the start. (We could try
to apply our prerelease-avoidance tactics solely in the cost functions,
but then it becomes a much less strict rule.)
At the very least, this change should allow you to run meteor on a
preview branch like cordova-hcp without getting a conflict between the
prerelease package on the branch/release and the lack of an explicit
constraint in .meteor/packages on that package, because we are
reintepreting the .meteor/packages constraint as meaning "anything
reasonable" and the in-the-release version counts as reasonable.
They are still used internally by the constraint solver (to implement
update --breaking) but cannot be externally specified.
Also, stop supporting "@none", whatever that was.
