Paul Pazderski created MNG-6983:
-----------------------------------
Summary: Plugin not executed when using pluginManagement and
variable in groupId
Key: MNG-6983
URL: https://issues.apache.org/jira/browse/MNG-6983
Project: Maven
Issue Type: Bug
Components: core, Plugins and Lifecycle
Affects Versions: 3.6.3
Reporter: Paul Pazderski
Attachments: pluginNotExecuted.zip
I have a project build with maven where some maven plugins are not executed
without any warning or error shown in output.
I was could reproduce the issue with a minimal example. (see attachment)
The expected result of this example is to get the one source file compiled if
you invoke {{mvn compile}}.
If I run this example using Maven 3.6.3 the following output appears:
{noformat}
[INFO] Scanning for projects...
[INFO]
[INFO] -------------------------< org.example:child >--------------------------
[INFO] Building child 0.0.1-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ child ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory
[...]\pluginNotExecuted\src\main\resources
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ child ---
[INFO] No sources to compile
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.644 s
[INFO] Finished at: [...]
[INFO] ------------------------------------------------------------------------
{noformat}
Notice that there is no execution of the build-helper-maven-plugin (and as
consequence no source compiled) and no indication why it is missing.
>From what I've found the problem seem to be the usage of variable in the
>plugins groupId. If you replace either the variable in parent- or child-pom
>with the actual value the build shows a warning
{noformat}
[WARNING]
[WARNING] Some problems were encountered while building the effective model for
org.example:child:jar:0.0.1-SNAPSHOT
[WARNING] 'build.plugins.plugin.version' for
org.codehaus.mojo:build-helper-maven-plugin is missing. @ line 16, column 21
[WARNING]
[WARNING] It is highly recommended to fix these problems because they threaten
the stability of your build.
[WARNING]
[WARNING] For this reason, future Maven versions might no longer support
building such malformed projects.
[WARNING]
{noformat}
If you replace both variables with the actual value everything works as
expected.
I investigated the problem further and will provide more details with a pull
request for a possible fix.
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