How to extract POM version in jobs

Deployments
1

Deploying to AWS Elastic Beanstalk (or a PaaS provider that accepts versioning of artifacts) require something like the following:

  deploy:
    docker:
      - image: circleci/python:2.7
    steps:
      - attach_workspace:
          at: /tmp/workspace
      - run: sudo pip install awscli
      - run: aws s3 cp /tmp/workspace/myapp-0.0.1-SNAPSHOT.jar s3://my-bucket --region us-east-1
      - run: aws elasticbeanstalk create-application-version --application-name myapp --version-label 0.0.1-SNAPSHOT --source-bundle S3Bucket="my-bucket",S3Key="myapp-0.0.1-SNAPSHOT.jar"

The question is, how can I pass the version information (namely 0.0.1-SNAPSHOT in this instance) from one job to another? This information is embedded in the pom.xml on the source code?

It does not appear there is a clean way to ask maven nicely for the project.version variable

2

If this data is available in the first job, have a look at workspaces. Workspaces are a way of declaring that a specified directory is to be preserved across a workflow. I would assume, then, that you could persist information in a text file, and then restore it in each job that you want to use it in.