How to pass shell commnds as variables in Jenkins

Question

I have a command that retrieves my most recent git commit hash.

git rev-parse HEAD

Is it possible to pass this as an environment variable to a Jenkins pipeline stage?

I've tried to do this,

environment {
    CURRENT_COMMIT_HASH=`git rev-parse HEAD`
}

but when I echo it in a later stage

stage ('Issues Report') {
    steps {
        sh '''
        echo "${CURRENT_COMMIT_HASH}"
        '''
        }   
    }

It comes out blank.

+ echo

it should return may be try adding the stage for git command then assign it to variable. https://www.jenkins.io/doc/pipeline/tour/environment/ — Vijay Daswani, Aug 27 '21 at 23:29
Why are people so obsessed by multi-line strings in an `sh` step? I've seen them in almost every Jenkins pipeline question with a single `sh` line lately. — Gerold Broser, Aug 28 '21 at 11:44
When looking at the accepted answer: Isn't the question about the other way round: _Assigning shell commands' output to a Jenkins environment variable_? — Gerold Broser, Aug 28 '21 at 12:06

score 4 · Accepted Answer · answered Aug 27 '21 at 23:29

This should work

stage ('Stage-Name') {
    environment {
        current_hash = """${sh(
        returnStdout: true,
        script: "git rev-parse HEAD"
        )}"""
    steps {
        sh '''
        echo "My current commit hash is $current_hash"
        '''
        }
      }

How to pass shell commnds as variables in Jenkins

1 Answers1