jenkinsfile not passing env to sh - jenkins

Question

I am trying to set environment variable in Jenkinsfile following way,
pipeline {
agent { label 'slave1' }
stages {
stage ('Build') {
steps {
script {
BUILD_VERSION = sh (
script: 'python get_firmware_version.py',
returnStdout: true
).trim()
}
echo "${BUILD_VERSION}"
withCredentials([file(credentialsId: 'image-sign', variable: 'IMAGE_SIGN')]) {
dir('firmware/') {
echo "${BUILD_VERSION}"
sh '''
echo "Building"
echo "${BUILD_VERSION}"
echo "${env.BUILD_VERSION}"
'''
}
}
}
}
}
post {
failure {
script {
echo "Pipeline Failed"
}
}
}
}
But its failing with following error Bad substitution
[Pipeline] echo
0_2_0
[Pipeline] sh
+ echo Building
Building
/home/jenkins/jenkins_slave/workspace/Firmware/Branch/firmware#tmp/durable-54e04481/script.sh: 3: /home/jenkins/jenkins_slave/workspace/Firmware/Branch/firmware#tmp/durable-54e04481/script.sh: Bad substitution
Why I can't set ENV Var and use it in sh step ?

Answer 1

This is Jenkins thing I think. When you use the sh block with '; it will not have access to things like environment variables. Try using the " instead. That should work
sh """
echo "Building"
echo "${env.BUILD_VERSION}"
echo "${env}"
"""
Jenkins should recognise the shell block and escape the " within the """ automatically.
pipeline {
agent { label 'slave1' }
stages {
stage ('Build') {
steps {
script {
BUILD_VERSION = sh (
script: 'python get_firmware_version.py',
returnStdout: true
).trim()
}
echo "${BUILD_VERSION}"
withCredentials([file(credentialsId: 'image-sign', variable: 'IMAGE_SIGN')]) {
dir('firmware/') {
echo "${BUILD_VERSION}"
sh """
echo "Building"
echo "${BUILD_VERSION}"
echo "${env.BUILD_VERSION}"
"""
}
}
}
}
}
post {
failure {
script {
echo "Pipeline Failed"
}
}
}
}
My test case
pipeline {
agent {
node {
label 'devops-jenkins-slave'
}
}
options {
timestamps()
}
stages {
stage('Setup'){
steps {
dir("${WORKSPACE}/"){
script {
BUILD_VERSION = "1"
}
sh """
echo "${BUILD_VERSION}"
"""
}
}
}
}
post {
always {
dir("${WORKSPACE}/"){
deleteDir()
}
}
}
}
Result
Running in Durability level: MAX_SURVIVABILITY
[Pipeline] node
Running on devops-jenkins-slave in /home/jenkins/workspace/Samples/Test
[Pipeline] {
[Pipeline] timestamps
[Pipeline] {
[Pipeline] stage
[Pipeline] { (Setup)
[Pipeline] dir
22:09:55 Running in /home/jenkins/workspace/Samples/Test
[Pipeline] {
[Pipeline] script
[Pipeline] {
[Pipeline] }
[Pipeline] // script
[Pipeline] sh
22:09:56 [Test] Running shell script
22:09:56 + echo 1
22:09:56 1
[Pipeline] }
[Pipeline] // dir
[Pipeline] }
[Pipeline] // stage
[Pipeline] stage
[Pipeline] { (Declarative: Post Actions)
[Pipeline] dir
22:09:56 Running in /home/jenkins/workspace/Samples/Test
[Pipeline] {
[Pipeline] deleteDir
[Pipeline] }
[Pipeline] // dir
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // timestamps
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
Finished: SUCCESS