display-parent-updates does not show updates correctly

[hetzijzo]

From version 2.14.0 the display-parent-updates does not show newer parent versions anymore.

Given I have a project which has a newer parent version in our maven repository.
When I run mvn org.codehaus.mojo:versions-maven-plugin:2.14.0:display-parent-updates
Then I expect to see The parent project has a newer version

But instead I see The parent project is the latest version

Running with a plugin version of 2.13.0 it gives the correct result.

[andrzejj0]

Please check with 2.14.2 as this is the newest release of the plugin.

If the problem occurs there as well, please provide an example project (pom.xml) which reproduces the issue.

[hetzijzo]

Creating a project with start.spring.io and downgrade the parent version from 2.7.7 to 2.7.6

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.7.6</version>
    <relativePath/> <!-- lookup parent from repository -->
  </parent>
  <groupId>com.example</groupId>
  <artifactId>demo</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>demo</name>
  <description>Demo project for Spring Boot</description>
  <properties>
    <java.version>11</java.version>
  </properties>
  <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter</artifactId>
    </dependency>

    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
    </dependency>
  </dependencies>

  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>

</project>

Test Result 2.14.2
Now run the command mvn org.codehaus.mojo:versions-maven-plugin:2.14.2:display-parent-updates.
This will give us the following result:

$ mvn org.codehaus.mojo:versions-maven-plugin:2.14.2:display-parent-updates
[INFO] Scanning for projects...
[INFO]
[INFO] --------------------------< com.example:demo >--------------------------
[INFO] Building demo 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- versions-maven-plugin:2.14.2:display-parent-updates (default-cli) @ demo ---
[INFO] The parent project is the latest version:
[INFO]   org.springframework.boot:spring-boot-starter-parent ......... 2.7.6
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  1.674 s
[INFO] Finished at: 2023-01-02T16:09:15+01:00
[INFO] ------------------------------------------------------------------------

Test Result 2.13.0
Using the same starting point with the above pom.xml. Now run the command mvn org.codehaus.mojo:versions-maven-plugin:2.13.0:display-parent-updates.
This will give us the following result:

$ mvn org.codehaus.mojo:versions-maven-plugin:2.13.0:display-parent-updates
[INFO] Scanning for projects...
[versions-demo.zip](https://github.com/mojohaus/versions/files/10332345/versions-demo.zip)

[INFO]
[INFO] --------------------------< com.example:demo >--------------------------
[INFO] Building demo 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- versions-maven-plugin:2.13.0:display-parent-updates (default-cli) @ demo ---
[INFO] The parent project has a newer version:
[INFO]   org.springframework.boot:spring-boot-starter-parent  2.7.6 -> 3.0.1
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  2.030 s
[INFO] Finished at: 2023-01-02T16:12:34+01:00
[INFO] ------------------------------------------------------------------------

[andrzejj0]

Thanks, confirmed.

[andrzejj0]

Polishing...

[andrzejj0]

Thanks for the report.

Running a bespoke test with the org.springframework.boot:spring-boot-starter-parent:2.7.6 as parent yields with the patch:

The parent project has a newer version:
  org.springframework.boot:spring-boot-starter-parent  2.7.6 -> 3.0.1