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faq.md

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Frequently Asked Question (FAQ)

Generated properties are not usable inside the pom / properties don't get exposed by the plugin

Since version 2.1.4 there is a switch to control if you want the plugin to expose the generated properties to your pom as well. This switch is set to false by default to ensure that properties of reactor builds can't be overwritten by accident. Thus if you need this feature set <injectAllReactorProjects>true</injectAllReactorProjects> inside the plugin's config.

If the properties are empty for some reason verify with the maven-antrun-plugin if they are correctly exposed. Example:

<plugin>
  <artifactId>maven-antrun-plugin</artifactId>
  <version>1.8</version>
  <executions>
    <execution>
      <phase>package</phase>
      <configuration>
        <target>
          <echo>Git-Infos: ${git.commit.id}</echo>
        </target>
      </configuration>
      <goals>
        <goal>run</goal>
      </goals>
    </execution>
  </executions>
</plugin>

If you are using the Maven build with Maven's Plugin Prefix Resolution (e.g. mvn somePrefix:goal) please note that this currently seems to be not supported by Maven. Instead of using the Plugin Prefix Resolution add an execution tag that calls the desired goal of the plugin within a normal Maven life cycle (e.g. mvn clean package).

Generated properties are not being used in install and/or deploy

If you try to use generated properties like ${git.commit.id} alongside with your artifact finalName you will soon notice that those properties are not being used in install and/or deploy. This specific behaviour is basically not intended / not supported by maven-install-plugin and/or maven-deploy-plugin (https://issues.apache.org/jira/browse/MINSTALL-1 / https://issues.apache.org/jira/browse/MDEPLOY-93). The naming format in the remote repo seems to be always $artifactId-$version-$classifier by default and thus any generated property will not end up inside the artifact being installed/deployed. If you for whatever reason still want to have something special you may want to checkout a full workaround that uses a specific configuration of install-file / deploy-file.

As a general note also ensure to use mvn clean deploy instead of mvn deploy:deploy (or you run into https://issues.apache.org/jira/browse/MNG-6260) and ensure to set <injectAllReactorProjects>true</injectAllReactorProjects> inside the plugin's config.