Is it possible to trigger a GitHub webhooks build - from another repo?

[Danijel DOMAZET]

Hi, 

My repo_main "depends" on several other repos. It internally uses a script to git clone repo_a, repo_b and repo_c into subdirs. 

This poses a problem when using webhooks to trigger Jenkins builds from GitHub. 

The question is: is there a way to trigger a build in repo_main when there has been a push in either repo_a, repo_b, or repo_c? 

Any help most appreciated... 

Thanks, Danijel.

- Confidential -

[gma...@gmail.com]

Hi,

You can do it from Jenkins itself.

 

For example, in our case we want the exact opposite, so we have in our pipeline:

 

stage('Setup') {
    when {
        beforeAgent true
        anyOf {
            triggeredBy 'UpstreamCause'
            triggeredBy 'UserIdCause'
        }
    }
    steps {

 

The above tells Jenkins to run the steps only if the build has been triggered by an upstream job or by a user.

 

To get what you want, you need a similar thing in repo_a, repo_b and repo_c that triggers the repo_main when webhook arrives:

 

stage('Setup') {
    when {
        beforeAgent true
        anyOf {
            triggeredBy 'SomethingGitHubTrigger' // look on internet for the exact name, I don’t know
            triggeredBy 'UserIdCause'
        }
    }
    steps {

build([
    job:
        "Your repo_main job",
    wait: false,
    propagate: false
])

 

And then everytime someone pushed on repo_a/b/c then the repo_main build is triggered on cascade.

 

I hope that helps.

Cheers,

Gianluca.

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[Danijel DOMAZET]

Thanks, that really helped. 

I managed to easily trigger another job from the main one using build([job...

 

But, somehow I cannot get GitHub to trigger the repo_main... the webhook is sent, but not received by the repo_main.

I tried triggeredBy 'GitHubPushTrigger' but still nothing. 

What am I doing wrong? 

Thanks.