Thanks Jeremy. Our developers already have control of their projects' 
branches' Jenkinsfiles so they can define whatever triggers/schedule they 
want. If I were going to hack this, I'd probably prefer to do the opposite 
of what you're recommending. Since git scanning is a wheel already invented 
many times, I'd rather NOT "Suppress Automatic SCM Triggering", but modify 
our pipelines (Declarative Jenkinsfile + loaded groovy file(s)) to check 
the "build cause" and act accordingly. Ultimately, we're likely to need 
this kind of sophistication anyway, since some build causes ( e.g. Branch 
Discovery, PR, commit, etc) may need special behavior. Ultimately 
ultimately, we'll have more build capacity and will be able to support 
per-commit builds, so perhaps some of this is temporary.

We're using Bitbucket On Prem, FWIW, and soon I will be implementing 
various Jenkins-Bitbucket integrations. Currently we're still just using 
Jenkins git plugin as BranchSource for our multibranch pipeline jobs. 
Perhaps once I switch us over to using the Bitbucket Server Integration 
plugin <https://plugins.jenkins.io/atlassian-bitbucket-server-integration/>, 
a more elegant solution to this fine control over Automatic SCM Triggering 
will become clear.

Cheers.

On Thursday, September 17, 2020 at 9:12:17 AM UTC-7 jeremy....@riftio.com 
wrote:

> You could leave the Automatic triggering suppressed and write a tool to 
> scan your GIT repo looking for new branches and trigger the build via an 
> API call when a new branch is found. Sounds like you might need such a tool 
> anyway so that developers could schedule builds. 
>
> On Thursday, September 17, 2020 at 12:59:27 AM UTC-4 timb...@gmail.com 
> wrote:
>
>> 1. I have a multibranch pipeline job that takes 30min to run, has a lot 
>> of branches, and my company is still at the earlier stages of devops 
>> transformation, so with our current infrastructure we do not want to 
>> trigger a build every commit.
>>
>> 2. Our job pipeline uses parameters heavily, so I would also like to 
>> automatically build each branch on branch creation/detection. 
>>
>> How do I achieve the above 2 requirements?
>>
>> Using git scm/plugin/branchsource, if I set (or clear) "Suppress 
>> Automatic SCM triggering", I get only one of the two requirements 
>> fulfilled: setting it suppresses ALL automatic triggering, not providing 2. 
>> Clearing it satisfies 2, automatically triggering a build on branch 
>> discovery, but also builds every commit which we don't want.
>>
>> In my research I have found the basic branch build strategies plugin 
>> <https://github.com/jenkinsci/basic-branch-build-strategies-plugin/blob/master/docs/user.adoc>,
>>  
>> and while it provides some great sophisticated control over what branches 
>> build when, in terms of ensuring the job is built on branch creation, it 
>> seems to only provide added suppression.
>>
>> Any suggestions would be welcome. Thanks.
>>
>

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