I have a list of long running Gradle tasks on different sub projects in my project. I would like to run these in parallel using Jenkins declarative pipeline.
I was hoping something like this might work:
projects = [":a", ":b", ":c"]
pipeline {
stage("Deploy"){
parallel {
for(project in projects){
stage(project ) {
when {
expression {
someConditionalFunction(project)
}
}
steps {
sh "./gradlew ${project}:someLongrunningGradleTask"
}
}
}
}
}
}
Needless to say that gives a compile error since it was expecting stage instead of for. Any ideas on how to overcome this? Thanks
I was trying to reduce duplicated code in my existing Jenkinsfile using declarative pipeline syntax. Finally I was able to wrap my head around the difference between scripted and declarative syntax.
It is possible to use scripted pipeline syntax in a declarative pipeline by wrapping it with a script {} block.
Check out my example below: you will see that all three parallel stages finish at the same time after waking up from the sleep command.
def jobs = ["JobA", "JobB", "JobC"]
def parallelStagesMap = jobs.collectEntries {
["${it}" : generateStage(it)]
}
def generateStage(job) {
return {
stage("stage: ${job}") {
echo "This is ${job}."
sh script: "sleep 15"
}
}
}
pipeline {
agent any
stages {
stage('non-parallel stage') {
steps {
echo 'This stage will be executed first.'
}
}
stage('parallel stage') {
steps {
script {
parallel parallelStagesMap
}
}
}
}
}
Parallel wants a map
structure. You are doing this a little inside-out. Build your map and then just pass it to parallel, rather than trying to iterate inside parallel.
Option 2 on this page shows you a way to do something similar to what you are trying.
At this link you can find a complex way I did this similar to a matrix/multi-config job:
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