How to catch branch name in Jenkinsfile

Question

I am using Jenkins for CI-CD on docker environment. I have 3 environments and branches according to the environment. Say, develop, qa, prod.

I am using Jenkins pipeline for building and pushing the image to DTR.

I just want to check how can I get the branch name in jenkinsfile so that I can have a condition on the basis of branch name to push the Docker image dependent upon branch name like:

if(env.BRANCH_NAME==develop){

Below is my Jenkinsfile:

pipeline { agent { label "master" } stages { stage('Build') { steps { echo '..........................Building Jar..........................' echo 'Pulling................................................' + env.BRANCH_NAME sh 'npm install' } } stage('Build-Image') { steps { echo '..........................Building Image..........................' sh 'sudo docker build -t some_org_dev/some_repo:v0.1 --build-arg PORT=9007 --build-arg ENVIRONMENT=develop .' } } stage('Tag-Image') { steps { if(env.BRANCH_NAME==develop){ echo '..........................Taging Image..........................' sh 'sudo docker login some_org_dev/some_repo -u username -p password' sh 'sudo docker tag some_org_dev/some_repo:v0.1 some_org/some_repo/service-portal:v0.1' }else if(env.BRANCH_NAME==qa){ echo '..........................Taging Image..........................' sh 'sudo docker login some_org_qa/some_repo -u username -p password' sh 'sudo docker tag some_org_qa/some_repo:v0.1 some_org/some_repo/service-portal:v0.1' } } stage('Push-Image') { steps { if(env.BRANCH_NAME==develop){ echo '..........................Pushing Image..........................' sh 'sudo docker push some_org_dev/some_repo:v0.1 some_org/some_repo/service-portal:v0.1' } }else if(env.BRANCH_NAME==qa){ echo '..........................Pushing Image..........................' sh 'sudo docker push some_org_qa/some_repo:v0.1 some_org/some_repo/service-portal:v0.1' } } } }

Sam · Accepted Answer · 2018-07-17 07:50:13Z

2

I believe you are missing quotes, Is the error your getting an undefined var? Try:

if (env.BRANCH_NAME== 'develop') {\\code here}

answered Jul 17, 2018 at 7:50

Sam

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8 Comments

Anand Deshmukh Over a year ago

I am getting null at echo 'Pulling................................................' + env.BRANCH_NAME in stage('Build') {

Sam Over a year ago

could you try echo('Pulling................................................' + env.BRANCH_NAME) for me

Anand Deshmukh Over a year ago

Same problem is here. . getting null

Sam Over a year ago

Have you done checkout scm? if not can you try above this command?

Anand Deshmukh Over a year ago

I have added checkout scm but still i am getting null. On the other hand if I do echo 'Pulling Job name......' + env.JOB_NAME I am getting the name of the job but branch is still null

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John Jones · Accepted Answer · 2018-10-12 23:42:20Z

On a multibranch-pipeline, I'm using something like the following:

pipeline { agent { label "jenkins" } stages { stage("A Stage") { when { expression { GIT_BRANCH ==~ /(develop)/ } } steps { sh 'deploy' } } } }

You might need to poke around with sh 'env' if you aren't using multibranch.

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