I am working on a pipeline script in Jenkins to build the project based on a commit message. From Jenkins' forum, I noticed that we can use SCM skip plugin. I installed the plugin and added the below stage as the forum suggests:
scmSkip(deleteBuild: true, skipPattern:'.*\\[ci skip\\].*')
When I commit a change with the following commit message:
git commit -m "[ci skip] Updated Audit Test Data Files with scan status"
The build is not skipped. It progresses with the other stages.
In console logs, I see the message
SCM Skip: Changelog is empty!
How do I construct the scmSkip call to skip the build when a commit message including "[ci skip]" is found? Are there alternatives that are easier to implement?
Thanks,
Karthik P.
It's probably because you didn't checkout first the repository
Be sure you aren't skipping the scm default checkout (via skipDefaultCheckout true) on the node where the build is running.
pipeline {
options {
skipDefaultCheckout false
}
stages {
stage('Check for Skip') {
steps {
scmSkip(deleteBuild: true, skipPattern:'.*\\[ci skip\\].*')
}
}
...
Related
This is my Jenkinsfile:
pipeline {
agent { docker { image 'node:10.16' } }
stages {
stage('PR To Dev') {
when {
changeRequest target: 'dev'
}
steps {
sh 'npm install'
sh 'npm run lint'
}
}
}
}
I'm trying to run linting upon every PR made (on Github). This pipeline works and runs as intended when I make the initial PR to the dev branch. However, subsequent commits to the open PR are ignored by Jenkins, which defeats the usefulness of the initial lint check. How can I configure Jenkins to lint upon any updates to a branch that has an open PR to the dev (or any arbitrary) branch?
Achieving this goal is possible. It depends greatly on the plugin that you are using to integrate GitHub with Jenkins, and how you configure GitHub to use Jenkins' webhooks.
On the GitHub end, you can configure to trigger the webhook on different events. Default config is Push events (to any branch, whether on PR or not), All events (these can have many false positives), and the option to Select individual events (find your right balance between events coverage and false positives)
On the Jenkins end, some plugins will offer more customization options to discard unnecessary triggers, for example to avoid triggering a project on PR updates of the title or description (instead of code), etc.
I, personally, use the Generic Webhook Plugin on the Jenkins end and then I analyze the json of the webhook to determine whether to run a job or not
I have created a jenkins pipeline job called "pipelinejob" with the below script:
pipeline {
agent any
stages {
stage ('Setup'){
steps{
//echo "${BRANCH_NAME}"
echo "${env.BRANCH_NAME}"
//echo "${GIT_BRANCH}"
echo "${env.GIT_BRANCH}"
}
}
}
}
Under General, I have selected "GitHub project" and inserted my company's github in the form:
https://github.mycompany.com/MYPROJECTNAME/MY_REPOSITORY_NAME/
Under Build Triggers, i have checked "GitHub hook trigger for GITScm polling
I have created a simple job called "simplejob" with same configuration as 1) and 2)
In my company's Github, i have created a webhook like "jenkins_url/jenkins/github-webhook/"
I commit a change in "mybranch" in "MY_REPOSITORY_NAME"
My simple job "simplejob" is triggered and built successfully
My pipeline job "pipelinejob" is not triggered
In Jenkins log i see the below:
Sep 12, 2019 2:42:45 PM INFO org.jenkinsci.plugins.github.webhook.subscriber.DefaultPushGHEventSubscriber$1 run
Poked simplejob
Nothing regarding my "pipelinejob".
Could you please point me to the right directions as to what to check next?
P.S. I have manually executed my "pipelinejob" successfully
I wasted two days of work on this, as none of the previous solutions worked for me. :-(
Eventually I found the solution on another forum:
The problem is that if you use a Jenkinsfile that is stored in GitHub, along with your project sources, then this trigger must be configured in the Jenkinsfile itself, not in the Jenkins or project configuration.
So add a triggers {} block like this to your Jenkinsfile:
pipeline {
agent any
triggers {
githubPush()
}
stages {
...
}
}
Then...
Push your Jenkinsfile into GitHub
Run one build manually, to let Jenkins know about your will to use this trigger.
You'll notice that the "GitHub hook trigger for GITScm polling" checkbox will be checked at last!
Restart Jenkins.
The next push should trigger an automated build at last!
On the left side-pane of your pipeline job, click GitHub Hook log. If it says 'Polling has not run yet', you will need to manually trigger the pipeline job once before Jenkins registers it to poke on receiving hooks.
Henceforth, the job should automatically trigger on GitHub push events.
I found an answer to this question with scripted pipeline file. We need to declare the Github push event trigger in Jenkins file as follows.
properties([pipelineTriggers([githubPush()])])
node {
git url: 'https://github.com/sebin-vincent/Treasure_Hunt.git',branch: 'master'
stage ('Compile Stage') {
echo "compiling"
echo "compilation completed"
}
stage ('Testing Stage') {
echo "testing completed"
echo "testing completed"
}
stage("Deploy") {
echo "deployment completed"
}
}
}
The declaration should be in the first line.
git url: The URL on which pipeline should be triggered.
branch: The branch on which pipeline should be triggered. When you specify the branch as master and make changes to other branches like develop or QA, that won't trigger the pipeline.
Hope this could help someone who comes here for an answer for the same problem with Jenkins scripted pipeline :-(.
The thing is whenever you create a pipeline job for git push which is to be triggered by github-webhook, first you need to build the pipeline job manually for one time. If it builds successfully, then Jenkins registers it to poke on receiving hooks. And from the next git push, your pipeline job will trigger automatically.
Note: Also make sure that the pipeline job built manually for the first time should be built successfully, otherwise Jenkins will not poke it. If it fails to build, you can never trigger the job again.
I am using Jenkins 2.89.2 and my project has Jenkinsfile which defines all build pipeline and steps. I have searched online for triggering build when push to github repo and all of them mentioned an options Build when a change was pushed to Github in jenkins configuration page. But in my jenkins configuration page I couldn't find this options. Below is an screenshot. It only has one options Periodically if not otherwise run. I have installed github related plugins but still I couldn't find that option. Is there any other configuration I can change?
Below is my Jenkinsfile:
pipeline {
agent {
label 'master'
}
tools {
maven 'maven-3.5.2'
jdk 'jdk9'
}
stages {
stage ('Checkout SCM') {
steps {
echo 'Checkout from Git...'
checkout scm
}
}
stage ('Build') {
steps {
echo 'Building '
}
}
}
}
After some searching I think I find the solution. The trigger option can be defined in jenkinsfile as below:
pipelineTriggers([
[$class: "GitHubPushTrigger"]
])
You basically have to create a HOOK from jenkins to gitHub, which is located under the Build Triggers option
This option should be available to you since you have the Git Plugin installed.
P.S. the solution you have mentioned will work only for Declarative Pipeline and will not work if you plan to switch to scripted pipeline
Jenkins declarative pipelines offer a post directive to execute code after the stages have finished. Is there a similar thing to run code before the stages are running, and most importantly, before the SCM checkout?
For example something along the lines of:
pre {
always {
rm -rf ./*
}
}
This would then clean the workspace of my build before the source code is checked out.
pre is a cool feature idea, but doesn't exist yet. skipDefaultCheckout and checkout scm (which is the same as the default checkout) are the keys:
pipeline {
agent { label 'docker' }
options {
skipDefaultCheckout true
}
stages {
stage('clean_workspace_and_checkout_source') {
steps {
deleteDir()
checkout scm
}
}
stage('build') {
steps {
echo 'i build therefore i am'
}
}
}
}
For the moment there are no pre-build steps but for the purpose you are looking for, it can be done in the pipeline job configurarion and also multibranch pipeline jobs, when you define where is your jenkinsfile, choose Additional Behaviours -> Wipe out repository & force clone.
Delete the contents of the workspace before building, ensuring a fully fresh workspace.
If you do not really want to delete everything and save some network usage, you can just use this other option: Additional Behaviours -> Clean before checkout.
Clean up the workspace before every checkout by deleting all untracked files and directories, including those which are specified in .gitignore. It also resets all tracked files to their versioned state. This ensures that the workspace is in the same state as if you cloned and checked out in a brand-new empty directory, and ensures that your build is not affected by the files generated by the previous build.
This one will not delete the workspace but just reset the repository to the original state and pull new changes if there are some.
I use "Prepare an environment for the run / Script Content"
We are using the pipeline plugin with multibranch configuration for our CD.
We have checked in the Jenkinsfile which works off git.
git url: "$url",credentialsId:'$credentials'
The job works fine, but does not auto trigger when a change is pushed to github.
I have set up the GIT web hooks correctly.
Interestingly, when I go into a branch of the multibranch job and I click "View Configuration", I see that the "Build when a change is pushed to Github" is unchecked. There is no way to check it since I can not modify the configuration of the job (since it takes from parent) and the same option is not there in parent.
Any ideas how to fix this?
For declarative pipelines try:
pipeline {
...
triggers {
githubPush()
}
...
}
For me this enables the checkbox "GitHub hook trigger for GITScm polling", but polling is not actually required. This requires the GitHub plugin.
I found a way to check the checkbox "Build when a change is pushed to Github".
This line did the trick:
properties([pipelineTriggers([[$class: 'GitHubPushTrigger'], pollSCM('H/15 * * * *')])])
I think the polling is needed to make it work. Would be nice if no polling is needed.
Here's a Jenkinsfile example with this implemented:
#!/usr/bin/env groovy
node ('master'){
stage('Build and Test') {
properties([pipelineTriggers([[$class: 'GitHubPushTrigger'], pollSCM('H/15 * * * *')])])
checkout scm
env.PATH = "${tool 'Maven 3'}/bin:${env.PATH}"
sh 'mvn clean package'
}
}
For declarative pipelines, try this:
pipeline {
agent any
triggers {
pollSCM('') //Empty quotes tells it to build on a push
}
}
If you use Stash for example you can register a Post-Receive WebHook where you have to insert your URL form Jenkins like : http://jenkinsHost:9090/git/notifyCommit?url=ssh://git#gitHost:1234/test.git
In your jenkins Job you have to set at least the Build trigger "Poll SCM".
And set a polling time of e.g 5 mins.
This enables also the automatic branch indexing for your multibranch project configuration.
Resorting to polling adds latency - time that it takes for a build to start and hence finish giving back a result.
It seemed to me that the basic plugins have a low level of abstraction, so I switched to the Github Organization Folder plugin, which depends on all of them and sets up an organization hook for triggering builds branches and/or pull requests.
Before I start, I would like to emphasize that I had no previous experience with Jenkins so far, so there might be a bunch of better solutions out there.
What I wanted to achieve in a nutshell:
After every push made to a Bitbucket repo(test2), on every branch,
pull and build another Bitbucket repo(test1), from an identical
branch name and right after that, build test2 using test1 as a
dependency.
How I managed to achieve that?
I started a new job with type 'Multibranch Pipeline'
I added the following Jenkinsfile to test2:
pipeline {
agent any
stages {
stage('build') {
steps {
dir('test1') {
git branch: BRANCH_NAME, url: 'git#bitbucket.org:user/test1.git', credentialsId: 'credentials_id'
}
sh('build_process')
}
}
}
}
I come across the issue that you can't set up a Bitbucket hook for pipelines
I added Bitbucket Branch Source Plugin to Jenkins
I selected Bitbucket at 'Branch Sources' when setting up the job
I added credentials and put a checkmark to Auto-register webhook
Under 'Scan Multibranch Pipeline Triggers' I put a checkmark to Periodically if not otherwise run, with an interval of 1 min
I added a webhook to my Bitbucket repo
I updated all my plugins, restarted Jenkins and it's ready to go
Other plugins I have installed: Bitbucket Plugin, Pipeline plugin. Hope this helps for somebody, I did manage to solve it this way after hours of struggling without the Bitbucket Branch Source Plugin.
node{
stage('Build and Test') {
properties([pipelineTriggers([[$class: 'GitHubPushTrigger'], pollSCM('* * * * *')])])
checkout([$class: 'GitSCM', branches: [[name: '*/master']], doGenerateSubmoduleConfigurations: false, extensions: [], submoduleCfg: [], userRemoteConfigs: [[credentialsId: 'xxx-xxx-xxxx[your credentails Id]', url: 'https://github.com/git']]])
echo 'Build and Test has been done'
}
}