I wrote a large library file full of Groovy methods.  I have a big stack of 
Jenkinsfiles, similar to Randy Beckworth, although mine are generally named 
"<purpose>/<environment>.Jenkinsfile" (as you can see, Jenkins isn't very 
particular about naming).  The Jenkinsfiles are generally very short, just 
long enough to call one of the library methods with a set of parameters.  
We have 50-80 Jenkins jobs, and each of those has its own Jenkins file.  
The initial set-up was tedious, but now that it's all in place it works 
very well.  Not sure if you could call a Python library, or if you'll end 
up using Groovy to call Python scripts.  My Groovy calls a lot of shell 
scripts - it's ugly, but works surprisingly well so you can make that work 
if you have to.

I think there are plugins and/or programmatic methods of generating jobs to 
avoid doing a lot of that tedious work yourself, but I also think you'd 
have to be looking at a very big setup (thousands of jobs) before it would 
be worth the investment of time to understand those plugins/methods.

Learning Jenkins' version of Groovy is a bit of a trip: it has a lot of its 
own methods, and I've found some weird edge cases where Jenkins' Groovy 
doesn't behave the same as standard Groovy.  All that said - it's 
definitely been worth the work.

On Monday, 1 June 2020 11:37:46 UTC-4, Al Silver wrote:
>
> I've used Jenkins a little but not in the traditional method of CI/CD. I'm 
> using Jenkins as a Web UI to run individual python scripts for networking 
> devices... Users would log into Jenkins and then select any one of numerous 
> Freestyle projects (with parameters) to run (there could be 100 or 
> more...).    The job executes a shell which runs a pytest script that logs 
> into (via ssh) multiple networking devices and performs some actions... 
> pretty straightforward and it works ok but has some limitations.  With that 
> said, I think I'll have more flexibility and power building and maintaining 
> these jobs as pipelines and treating them as code.  My question is I guess 
> I would need to convert my pipelines into Jenkinsfiles?  However, most of 
> the docs I read show a single Jenkinsfile (named "Jenkinsfile") I would 
> need one for each job (a 100 or so).  I must be missing something here or 
> not understanding.  Can someone point in the right direction for what I'm 
> trying to accomplish?
>
> Thx
> Al
>

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