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https://issues.apache.org/jira/browse/MRESOLVER-336?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17806848#comment-17806848
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Tamas Cservenak edited comment on MRESOLVER-336 at 1/15/24 2:24 PM:
--------------------------------------------------------------------

These two cases (as this issue is about two issues: original description is 
about "ga" qualifier, while 1st comment is about "foo" string) are such a 
corner cases, that we agree that those are more "undefined" (than 
"undocumented"), and both can be circumvented if you use documented versioning 
scheme, so basically I am keen to close this issue as "won't fix", as none of 
the examples fit under "normal" versioning schemes (they are more like 
stretching those).

For start:
* please do not start versions with qualifier or strings, make them start with 
number
* stick with documented (and recommended) qualifiers, IF must, but ideally 
avoid them.


was (Author: cstamas):
These two cases (as this issue is about two issues: original description is 
about "ga" qualifier, while 1st comment is about "foo" string) are such a 
corner cases, that we agree that those are more "undefined" (than 
"undocumented"), and both can be circumvented if you use documented versioning 
scheme, so basically I am keen to close this issue as "won't fix", as none of 
the examples fit under "normal" versioning schemes (they are more like 
stretching those).

For start:
* please do not start versions with qualifier or strings, make them start with 
number
* stick with documented (and recommended) qualifiers, IF must, ideally avoid 
them.

> Unexpected handling of qualifiers in GenericVersionScheme
> ---------------------------------------------------------
>
>                 Key: MRESOLVER-336
>                 URL: https://issues.apache.org/jira/browse/MRESOLVER-336
>             Project: Maven Resolver
>          Issue Type: Bug
>          Components: Resolver
>    Affects Versions: 1.9.5
>            Reporter: David M. Lloyd
>            Assignee: Tamas Cservenak
>            Priority: Major
>             Fix For: 2.0.0
>
>
> Given the following:
> {code}
> $ jbang --main=org.eclipse.aether.util.version.GenericVersionScheme 
> org.apache.maven.resolver:maven-resolver-util:1.9.5 0.0.0.ga.ga.foo foo
> Display parameters as parsed by Maven Resolver (in canonical form and as a 
> list of tokens) and comparison result:
> 1. 0.0.0.ga.ga.foo -> 0.0.0.ga.ga.foo; tokens: [0, 0, 0, foo]
>    0.0.0.ga.ga.foo == foo
> 2. foo -> foo; tokens: [foo]
> {code}
> This is expected iff zero-prefixed qualifiers are considered equal to the 
> bare qualifier, which does seem to be the case *mostly*. However, we also 
> have this:
> {code}
> $ jbang --main=org.eclipse.aether.util.version.GenericVersionScheme 
> org.apache.maven.resolver:maven-resolver-util:1.9.5 ga.ga.foo foo
> Display parameters as parsed by Maven Resolver (in canonical form and as a 
> list of tokens) and comparison result:
> 1. ga.ga.foo -> ga.ga.foo; tokens: [0, 0, foo]
>    ga.ga.foo < foo
> 2. foo -> foo; tokens: [foo]
> {code}
> In this case we have "zero"-valued qualifiers but no leading numerical 
> segment, which unexpectedly changes the parsing rules. I would expect 
> {{ga.ga.foo == foo}} as above. Is this a bug? Is there an explanation for 
> this behavior? The spec doesn't seem to directly address this.



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