Run pipeline only when new commits for a specific tag

[Stefano Tranquillini]

Hi all,

i've a pipeline that runs for my code, now, I work with Bitbucket and I found a way to start the pipeline via the webhook, the problem is that it builds every push, which I don't want.
What I would like is that it build everythime the tag "develop" is pushed to the remote and there are new commits.
The BitBucket webhook is raised every push, so I need to modify the pipe in order to avoid building if there are no new commits in that speciic tag.

node{
    properties([disableConcurrentBuilds(), buildDiscarder(logRotator(artifactDaysToKeepStr: '', artifactNumToKeepStr: '', daysToKeepStr: '', numToKeepStr: '10')), parameters([string(defaultValue: '...', description: '', name: 'CUSTOMER_ID'), string(defaultValue: 'Develop', description: '', name: 'BUILD_ID'), string(defaultValue: '...', description: '', name: 'CUSTOMER_KEY')])], pipelineTriggers([[$class: 'BitBucketTrigger']])

stage('checkout'){
            checkout([$class: 'GitSCM', branches: [[name: '*/tags/develop']], doGenerateSubmoduleConfigurations: false, extensions: [[$class: 'SubmoduleOption', disableSubmodules: false, parentCredentials: true, recursiveSubmodules: true, reference: '', trackingSubmodules: false]], submoduleCfg: [], userRemoteConfigs: [[credentialsId: '.....', refspec: '+refs/tags/*:refs/remotes/origin/tags/*', url: 'REMOTEURL']]])
        }

        stage('setup'){
....

}
}

How can I write an If for the checkout to say: exit if there are new commits or keep going if there's a new commit compared to last build??

PS: if i will have tags with version, so develop-1 develop-2, and I'll change the branch to '*/tags/develop*' which branch will be built?

[Cuong Tran]

Tags are mostly read-only, so I'm not sure what you're trying to do with "detect new commits" in specific tag.  You can probably say "trigger builds for any new tag that matches tags/develop/*" and your tags have to be "develop/v1", "develop/v2", etc.

[Stefano Tranquillini]

i move the tag to the commit i want. the fact is that i can use the tag. but if i trigger the pipeline every commit it will build even if the tag. commit is it changed. right? 

if i've v1 v2 etc. which build will jenkins do? all?

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Stefano - Sent with my thumbs