Jenkins Pipeline Syntax: Difference between revisions
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=Declarative Pipeline= | =Declarative Pipeline= | ||
{{External|https://www.jenkins.io/doc/book/pipeline/syntax/#declarative-pipeline}} | |||
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Revision as of 02:17, 23 February 2021
External
- https://jenkins.io/doc/book/pipeline/syntax/
- https://jenkins.io/doc/pipeline/steps/
- https://jenkins.io/doc/pipeline/steps/core/
Internal
Scripted Pipeline
node('some-worker-label') {
echo 'Pipeline logic starts'
stage('Build') {
// ...
}
stage('Test') {
// ...
}
stage('Deploy') {
// ...
}
Parallel Stages
stage("tests") {
parallel(
"unit tests": {
// run unit tests
},
"coverage tests": {
// run coverage tests
}
)
}
Declarative Pipeline
pipeline {
agent any
options {
skipStagesAfterUnstable()
}
stages {
stage('Build') {
steps {
sh 'make'
}
}
stage('Test'){
steps {
sh 'make check'
junit 'reports/**/*.xml'
}
}
stage('Deploy') {
steps {
sh 'make publish'
}
}
}
}
Declarative Pipeline Directives
environment
See:
parameters
See:
Environment Variables
Parameters
Pipeline Steps
node
Allocates an executor or a node, typically a worker, and run the enclosed code in the context of the workspace of that worker. Node may take a label name, computer name or an expression.
The labels are declared on workers when they are defined in the master configuration, in their respective "clouds".
sh
Shell Script.
The metacharacter $ must be escaped: \${LOGDIR}, unless it refers to a variable form the Groovy context.
Example:
stage.sh """
LOGDIR=${fileName}-logs
mkdir -p \${LOGDIR}/something
""".stripIndent()
ws
Allocate workspace.
build
This is how a main pipeline launches in execution a subordinate pipeline.
This is how we may be able to return the result: https://support.cloudbees.com/hc/en-us/articles/218554077-How-to-set-current-build-result-in-Pipeline
junit
Jenkins understands the JUnit test report XML format (which is also used by TestNG). To use this feature, set up the build to run tests, which will generate their test reports into a local agent directory, then specify the path to the test reports in Ant glob syntax to the JUnit plugin pipeline step junit
stage.junit **/target/*-report/TEST-*.xml
Jenkins uses this step to ingest the test results, process them and provide historical test result trends, a web UI for viewing test reports, tracking failures, etc.
Basic Steps
These basic steps are used invoking on stage.. In a Jenkinsfile, and inside a stage, invoke on this. or simply invoking directly, without qualifying.
dir
Change current directory.
pwd
Return the current directory path as a string.
echo
echo "pod memory limit: ${params.POD_MEMORY_LIMIT_Gi}"
echo """
Run Configuration:
something: ${SOMETHING}
something else: ${SOMETHING_ELSE}
"""
error
readFile
Read a file from the workspace.
def versionFile = readFile("${stage.WORKSPACE}/terraform/my-module/VERSION")
stash
input
In its basic form, renders a "Proceed"/"Abort" input box with a custom message. Selecting "Proceed" passes the control to the next step in the pipeline. Selecting "Abort" throws a org.jenkinsci.plugins.workflow.steps.FlowInterruptedException, which produces "gray" pipelines.
input(
id: 'Proceed1',
message: 'If the manual test is successful, select \'Proceed\'. Otherwise, you can abort the pipeline.'
)
timeout
Upon timeout, an org.jenkinsci.plugins.workflow.steps.FlowInterruptedException is thrown from the closure that is being executed, and not from the timeout() invocation. The code shown below prints "A", "B", "D":
timeout(time: 5, unit: 'SECONDS') {
echo "A"
try {
echo "B"
doSometing(); // this step takes a very long time and will time out
echo "C"
}
catch(org.jenkinsci.plugins.workflow.steps.FlowInterruptedException e) {
// if this exception propagates up without being caught, the pipeline gets aborted
echo "D"
}
}
writeFile
withEnv
Core
archiveArtifacts
Archives the build artifacts (for example, distribution zip files or jar files) so that they can be downloaded later. Archived files will be accessible from the Jenkins webpage. Normally, Jenkins keeps artifacts for a build as long as a build log itself is kept. Note that the Maven job type automatically archives any produced Maven artifacts. Any artifacts configured here will be archived on top of that. Automatic artifact archiving can be disabled under the advanced Maven options.
fingerprint
Obtaining the Current Pipeline Build Number
def buildNumber = currentBuild.rawBuild.getNumber()
FlowInterruptedException
throw new FlowInterruptedException(Result.ABORTED)
String branch="..."
String projectName = JOB_NAME.substring(0, JOB_NAME.size() - JOB_BASE_NAME.size() - 1)
WorkflowMultiBranchProject project = Jenkins.instance.getItemByFullName("${projectName}")
if (project == null) {
...
}
WorkflowJob job = project.getBranch(branch)
if (job == null) {
...
}
WorkflowRun run = job.getLastSuccessfulBuild()
if (run == null) {
...
}
List<Run.Artifact> artifacts = run.getArtifacts()
...
Passing an Environment Variable from Downstream Build to Upstream Build
Upstream build:
...
def result = build(job: jobName, parameters: params, quietPeriod: 0, propagate: true, wait: true);
result.getBuildVariables()["SOME_VAR"]
...
Downstream build:
env.SOME_VAR = "something"