Jenkins pipeline branch name returns null

Question

I\'m trying to get the name of my branch for a jenkins groovy script. I cannot get the current branch name. I try the following:

stage(\'Check out code\')
ch         


        

Answer 1

git.exe checkout -f 33b531b2f1caaf8b64d968e437306f39d2dba1da

That would make the git repo enter a detached HEAD mode, which, by its very nature, has no branch.

From Jenkinsfile:

The checkout step will checkout code from source control; scm is a special variable which instructs the checkout step to clone the specific revision which triggered this Pipeline run.

So the ${env.BRANCH_NAME} is null.

As mentioned in "Jenkins Workflow Checkout Accessing BRANCH_NAME and GIT_COMMIT", you can get the SHA1 you just checked out with the groovy syntax (to be adapted in a Jenkins pipeline DSL):

sh 'git rev-parse HEAD > commit'
def commit = readFile('commit').trim()