David M. Lloyd created MRESOLVER-334:
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Summary: Maven Resolver's GenericVersionScheme diverges from the
spec
Key: MRESOLVER-334
URL: https://issues.apache.org/jira/browse/MRESOLVER-334
Project: Maven Resolver
Issue Type: Bug
Components: Resolver
Affects Versions: 1.9.5
Reporter: David M. Lloyd
The [specification for version
resolution|https://maven.apache.org/pom.html#version-order-specification]
indicates these two facts which disagree with the implementation in
{{GenericVersionScheme}}:
* "The Maven coordinate is split in tokens between dots ('{{.}}'), hyphens
('{{-}}') and transitions between digits and characters." - in
{{GenericVersion}}, the underscore ('{{_}}') is also treated as a separator.
* In the examples area, it says that while "{{1-sp.1}}" {{>}} "{{1-ga.1}}", at
the same time "{{1-sp-1}}" {{<}} "{{1-ga-1}}" {{=}} "{{1-1}}" due to "trailing
'null' values at each hyphen". But in addition to being untrue in the actual
implementation, this relation is clearly nonsensical because it would place
{{sp}} before {{ga}}, which would have a tremendous negative impact on the
existing artifact ecosystem if it were carried out in the implementation.
* Also in the example area, we have "{{1.foo}}" {{=}} "{{1-foo}}" {{<}}
"{{1-1}}" {{<}} "{{1.1}}", whereas in practice it is (rightly) "{{1.foo}}"
{{=}} "{{1-foo}}" {{<}} "{{1-1}}" {{=}} "{{1.1}}".
In my opinion all of these things are spec errors so I'd be happy to see the
spec page be updated and this bug consequently closed as "out of date",
especially since the implementation behavior has been in the wild for some time.
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