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https://issues.apache.org/jira/browse/MNG-6801?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16976636#comment-16976636
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Gabriel Belingueres commented on MNG-6801:
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[~liana.lupsa1]: I updated the stackoverflow question with a groovy script that
preserves properties order. HTH.
I looked into the issue and fixing it will require some changes in the code
generated by modello, like making readers an writers provide Factory Methods
for the Model parts or extending the maven Model generation to add new methods
for things stored as a java.util.Properties. I think this requires extensive
discussion in the dev mailing list.
> MavenXpp3Writer doesn't retain structure
> ----------------------------------------
>
> Key: MNG-6801
> URL: https://issues.apache.org/jira/browse/MNG-6801
> Project: Maven
> Issue Type: Bug
> Components: Plugins and Lifecycle
> Reporter: Liana Lupsa
> Priority: Major
>
> Context:
> We are using pipeline-utility-steps-plugin which is a jenkins plugin which
> uses the following classes:
>
> [https://github.com/jenkinsci/pipeline-utility-steps-plugin/blob/master/src/main/java/org/jenkinsci/plugins/pipeline/utility/steps/maven/ReadMavenPomStep.java].
>
> [https://github.com/jenkinsci/pipeline-utility-steps-plugin/blob/master/src/main/java/org/jenkinsci/plugins/pipeline/utility/steps/maven/WriteMavenPomStep.java#L32]
> In our Jenkins file we have a stage that overwrites the version in the pom
> with the computed version and for this we need pipeline-utility-steps-plugin.
> The problem is that the tags in the pom.xml are never retained in the same
> order. The elements in the pom file are completelly rearranged.
> For consistency reasons and idempotency we need to retain the structure and
> simply update one line.
> Status:
> After evaluating the plugin code we noticed that it uses:
>
> [https://github.com/jenkinsci/pipeline-utility-steps-plugin/blob/master/src/main/java/org/jenkinsci/plugins/pipeline/utility/steps/maven/WriteMavenPomStep.java#L32]
> and imports:
> import org.apache.maven.model.io.xpp3.MavenXpp3Writer;
> with
> [https://maven.apache.org/ref/3.3.9/maven-model/apidocs/src-html/org/apache/maven/model/io/xpp3/MavenXpp3Writer.html]
> which uses
> XmlSerializer serializer = new MXSerializer();
>
> [https://github.com/sonatype/plexus-utils/blob/master/src/main/java/org/codehaus/plexus/util/xml/pull/MXSerializer.java]
> We think that maven XmlSerializer causes this problem.
> Example of the pom.xml changes:
> first build trigger:
> run 1:
> <properties>
> <javax.version>3.1.0</javax.version>
> <mockito.version>1.10.19</mockito.version>
> <hamcrest.version>2.1</hamcrest.version>
> <openam.version>6.5.1</openam.version>
> <lombok.version>1.18.6</lombok.version>
> <junit.version>4.12</junit.version>
> </properties>
> run 2:
> <properties>
> <mockito.version>1.10.19</mockito.version>
> <javax.version>3.1.0</javax.version>
> <hamcrest.version>2.1</hamcrest.version>
> <openam.version>6.5.1</openam.version>
> <lombok.version>1.18.6</lombok.version>
> <junit.version>4.12</junit.version>
> </properties>
> and run 3:
> <properties>
> <javax.version>3.1.0</javax.version>
> <mockito.version>1.10.19</mockito.version>
> <hamcrest.version>2.1</hamcrest.version>
> <openam.version>6.5.1</openam.version>
> <lombok.version>1.18.6</lombok.version>
> <junit.version>4.12</junit.version>
> </properties>
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