jenkins pipeline nodeJs - node.js

Question

My JenkinsFile script started throwing npm not found error. (it is working for maven but failing at npm)
pipeline {
environment {
JENKINS='true'
}
agent any
stages{
stage('change permissions') {
steps {
sh "chmod 777 ./mvnw "
}
}
stage('clean') {
steps {
sh './mvnw clean install'
}
}
stage('yarn install') {
steps{
sh 'npm install -g yarn'
sh 'yarn install'
}
}
stage('yarn webpack:build') {
steps {
sh 'yarn webpack:build'
}
}
stage('backend tests') {
steps {
sh './mvnw test'
}
}
stage('frontend tests') {
steps {
sh 'yarn test'
}
}
}
}
To fix that
I am trying to setup NodeJs on my jenkins node. I installed the nodejs plugin and wrote the script
pipeline {
agent any
stages {
stage('Build') {
steps {
nodejs(nodeJSInstallationName: 'Node 6.x', configId: '<config-file-provider-id>') {
sh 'npm config ls'
}
}
}
}
}
as shown in the https://wiki.jenkins.io/display/JENKINS/NodeJS+Plugin
I also setup nodejs on global tools config
I also tried the solution in the installing node on jenkins 2.0 using the pipeline plugin
and it throws
Expected to find ‘someKey "someValue"’ # line 4, column 7.
node {
error.
but I am still getting npm not found error on jenkins. I am new to jenkins so any help is appreciated.
Thanks in advance
I was able to fix the issues. Followed the following link and was able to fix the issue. https://medium.com/#gustavo.guss/jenkins-starting-with-pipeline-doing-a-node-js-test-72c6057b67d4

Answer 1

Its a puzzle. ;)
Has a little reference trick.
You need to configure your jenkins to see your nodejs config name.
At Global Tool Configuration, you need define your node config name. It has reference to your Jenkinsfile reference.
Look an Jenkingsfile adapted example with reference:
pipeline {
agent any
tools {nodejs "node"}
stages {
stage('Cloning Git') {
steps {
git 'https://github.com/xxxx'
}
}
stage('Install dependencies') {
steps {
sh 'npm i -save express'
}
}
stage('Test') {
steps {
sh 'node server.js'
}
}
}
}
Complete case to study: Post at Medium by Gustavo Apolinario
Hope it helps!

Answer 2

If you need different version of Node.js and npm, you can install NodeJS plugin for Jenkins.
Go to Manage Jenkins -> Global tools configuration and find NodeJS section.
Select the version you need and name it as you prefer. You can also add npm packages that needs to be installed globally.
In a declarative pipeline, just reference the correct version of node.js to use:
stage('Review node and npm installations') {
steps {
nodejs(nodeJSInstallationName: 'node13') {
sh 'npm -v' //substitute with your code
sh 'node -v'
}
}
}
Full example here: https://pillsfromtheweb.blogspot.com/2020/05/how-to-use-different-nodejs-versions-on.html