Support lightweight checkout for pipeline jobs

[francoisferrand]

Add the lightweight property to cpsScm, to allow lightweight checkout
to retrieve the pipeline script.

[dalbertom]

hey @daspilker I was wondering if this is needed as part of JENKINS-46463.

I tried the snippet mentioned in the ticket

pipelineJob(String name) {
  definition {
    cpsScmFlowDefinition {
      scm { ... }
      scriptPath(String value)
      lightweight(boolean value)
    }
  }
}

but since my definition already has a cpsScm block I'm not sure if I should have both or just cpsScmFlowDefinition. The scm block with git didn't seem to work in cpsScmFlowDefinition (I got a "ERROR: (controlCreate.groovy, line 1212) No signature of method: javaposse.jobdsl.plugin.structs.DescribableListContext.git() is applicable for argument types")

Should lightweight be documented in https://jenkinsci.github.io/job-dsl-plugin ?

Thanks!

[dalbertom]

I was able to get it to work via configure:

pipelineJob(jobname) {
  description(jobDescription)                                                                                
  definition {                                                                                               
    cpsScm {                                                                                                 
      scm {                                                                                                  
        git {                                                                                                
        ...
        }                                                                                                    
      }                                                                                                      
      scriptPath("$jenkinsfile")                                                                             
    }                                                                                                        
  }                                                                                                          
  configure { node ->                                                                                        
    node/definition << {                                                                                     
      lightweight(true)
    }                                                                                                        
  }                                                                                                          
}                                                                                                            

[jiff-infrastructure]

Can one of the admins verify this patch?