Injecting a variable into pom.xml from Jenkinsfile - maven

Question

I am trying to configure SCM for my maven release plugin. However, the issue is: the pom.xml in my archetype, I dont want to hardcode a single scm variable but rather a parametrized version. In my jenkinsfile, we have a proprietary tool that fills the scm url, so I want to substitute that url into my pom.xml once I setup the project from my archetype. See code snippet below.
<developerConnection>scm:git:${myVariable}</developerConnection>
In my Jenkinsfile, I pull out this value like this (this works correctly):
node {
stage 'Checkout'
checkout scm
def myVariable= sh(returnStdout: true, script: 'git config remote.origin.url').trim()
So, to recap, I want to know how the value from Jenkins can get substituted into the pom.xml?
Right now, I am getting this error:
[INFO] fetch url: ${myVariable}
[INFO] push url: ${myVariable}
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 5.755 s
[INFO] Finished at: 2017-07-17T16:21:00+00:00
[INFO] Final Memory: 20M/784M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-release-plugin:2.5.3:prepare (default-cli) on project newSeedService: An error is occurred in the checkin process: Exception while executing SCM command. JGit checkin failure! ${myVariable}: not found. -> [Help 1]
Thank you

Answer 1

if you want to isolate these properties from the project POM, you can use properties file, you will have to use Properties Maven plugin, and run it's read-project-properties goal in the initialize phase of the Maven lifecycle. The example from the plugin page is reproduced here:
<project>
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>properties-maven-plugin</artifactId>
<version>1.0-alpha-2</version>
<executions>
<execution>
<phase>initialize</phase>
<goals>
<goal>read-project-properties</goal>
</goals>
<configuration>
<files>
<file>etc/config/dev.properties</file>
</files>
</configuration>
</execution>
</executions>
</plugin>
</plugins>