David M. Lloyd created MNG-6964:
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Summary: Maven version sorting is internally inconsistent
Key: MNG-6964
URL: https://issues.apache.org/jira/browse/MNG-6964
Project: Maven
Issue Type: Bug
Components: core
Affects Versions: 3.6.3
Reporter: David M. Lloyd
There's a bug where version sorting is inconsistent. This manifests like this:
{code}
$ java -jar ~/local/apache-maven/lib/maven-artifact-3.6.3.jar 1-0.alpha 1
Display parameters as parsed by Maven (in canonical form) and comparison result:
1. 1-0.alpha == 1-0.alpha
1-0.alpha == 1
2. 1 == 1
$ java -jar ~/local/apache-maven/lib/maven-artifact-3.6.3.jar 1-0.beta 1
Display parameters as parsed by Maven (in canonical form) and comparison result:
1. 1-0.beta == 1-0.beta
1-0.beta == 1
2. 1 == 1
$ java -jar ~/local/apache-maven/lib/maven-artifact-3.6.3.jar 1-0.beta 1-0.alpha
Display parameters as parsed by Maven (in canonical form) and comparison result:
1. 1-0.beta == 1-0.beta
1-0.beta > 1-0.alpha
2. 1-0.alpha == 1-0.alpha
{code}
Thus there is no correct total order: {{1-0.beta > 1.0.alpha}} even though both
{{1-0.beta}} and {{1.0.alpha}} are equal to {{1}}.
I think this is likely due to a logical bug where any dot-separated segments
following a zero or release ({{ga}} or {{final}}) is simply truncated in
certain circumstances:
{code}
$ java -jar ~/local/apache-maven/lib/maven-artifact-3.6.3.jar 1-0.x 1-0
Display parameters as parsed by Maven (in canonical form) and comparison result:
1. 1-0.x == 1-0.x
1-0.x == 1-0
2. 1-0 == 1
{code}
but
{code}
$ java -jar ~/local/apache-maven/lib/maven-artifact-3.6.3.jar 1-0.x-1 1-0-1
Display parameters as parsed by Maven (in canonical form) and comparison result:
1. 1-0.x-1 == 1-0.x-1
1-0.x-1 > 1-0-1
2. 1-0-1 == 1-1
{code}
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