Jenkins Pipeline "yarn install" command not found - jenkins

Question

This is my first Jenkins script, it currently operates well on Linux but I migrate to MacOS (High Sierra) with the result of getting shell script error.
Node and yarn packages are installed on local Jenkins user. I can't figure out why this error just happens, could anyone give me a hand on this?
Here is my Jenkins file:
node {
stage('Check out') {
checkout scm
}
stage('Prepare') {
sh "yarn install"
}
stage('Test') {
sh "yarn test"
}
stage('Sonar') {
if (env.BRANCH_NAME == 'dev') {
def scannerHome = tool 'sonar scanner';
withSonarQubeEnv('sonar') {
sh "${scannerHome}/bin/sonar-scanner"
}
}
}
}
And full log:
14:43:11 Connecting to https://api.github.com using hariklee/******
Obtained Jenkinsfile from 6c639bd70ac86cbe6a49ac0b58bcc10e3c64a375
Running in Durability level: MAX_SURVIVABILITY
[Pipeline] node
Running on Jenkins in
/Users/Shared/Jenkins/Home/workspace/wingman_423_ci_cd-7PSSGRAMBTXUQRESYCNVODXU7IZJLJLPHQOE3KYEPCSAAYAFFD4A
[Pipeline] {
[Pipeline] stage
[Pipeline] { (Check out)
[Pipeline] checkout
git rev-parse --is-inside-work-tree # timeout=10
Fetching changes from the remote Git repository
git config remote.origin.url https://github.com/wingman-xyz/app.git # timeout=10
Fetching without tags
Fetching upstream changes from https://github.com/wingman-xyz/app.git
git --version # timeout=10
using GIT_ASKPASS to set credentials
git fetch --no-tags --progress https://github.com/wingman-xyz/app.git +refs/heads/423_ci_cd:refs/remotes/origin/423_ci_cd
Checking out Revision 6c639bd70ac86cbe6a49ac0b58bcc10e3c64a375 (423_ci_cd)
git config core.sparsecheckout # timeout=10
git checkout -f 6c639bd70ac86cbe6a49ac0b58bcc10e3c64a375
Commit message: "jenkins test"
First time build. Skipping changelog.
[Pipeline] }
[Pipeline] // stage
[Pipeline] stage
[Pipeline] { (Prepare)
[Pipeline] sh
[wingman_423_ci_cd-7PSSGRAMBTXUQRESYCNVODXU7IZJLJLPHQOE3KYEPCSAAYAFFD4A] Running shell script
yarn install
/Users/Shared/Jenkins/Home/workspace/wingman_423_ci_cd-7PSSGRAMBTXUQRESYCNVODXU7IZJLJLPHQOE3KYEPCSAAYAFFD4A#tmp/durable-cf573520/script.sh: line 2: yarn: command not found
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
GitHub has been notified of this commit’s build result
ERROR: script returned exit code 127
Finished: FAILURE

Answer 1

There is no yarn command in your PATH variable.
Do npm install -g yarn before
stage('Prepare') {
sh "npm install -g yarn"
sh "yarn install"
}
If you get an error about not found npm command then you will have to add npm explicitly to your PATH using withEnv() {}
withEnv(['PATH+NODE=/something=/path/to/node/bin']) {
stage('Prepare') {
sh "npm install -g yarn"
sh "yarn install"
}
}