Generate variable value from command output

[Swanthe Lindgren]

I try to extract the project.version from my maven project pom file using the help plug-in and assign it to a variable so I can use it to push my docker image.

- step:
  script: # Modify the commands below to build your repository.
    - POM_VERSION='mvn help:evaluate -Dexpression=project.version -q -DforceStdout'
    - echo "version ${POM_VERSION}"

But all I get in my log is

version mvn help:evaluate -Dexpression=project.version -q -DforceStdout

When I expected to get

version 1.0.4

How can I get the command output assigned to a variable?

[Swanthe Lindgren]

Think I finally found it by trail and error

export POM_VERSION=$(mvn help:evaluate -Dexpression=project.version -q -DforceStdout)

echo "version $POM_VERSION"

version 1.0.4