Create a child job from a parent "seed" job with Job DSL

Question

I am an IT student and I need help with my school project.

I am trying to build a freeStyleJob that takes 2 parameters : a GitHub Repository and a Display Name to create a child job that automatically executes tests on that repository. The parent parameters should be set in stone in the childs' environment. Everything must be defined in a single job_dsl.groovy file.

The child job is at root while the parent is inside the Tools folder.

The problem I am facing is creating a "template" for that child job.

Here is my current job_dsl.groovy file :

def seedTemplate = { seedTemplate ->
    freeStyleJob("seed_template") {
    properties {
        githubProjectUrl('https://github.com/"$GITHUB_NAME"')
    }
    triggers {
        cron("H/1 * * * *")
        githubPush()
    }
    wrappers {
        preBuildCleanup {
            deleteDirectories()
                cleanupParameter('CLEANUP')
                }
        }
    steps {
        shell('ls')
        shell('make')
    }       //steps
    }       //freeStyle
}       //seedTemplate

freeStyleJob('/Tools/SEED') {
    parameters {
        stringParam("GITHUB_NAME",
                    null,
                    "GitHub repository owner/repo_name (e.g.: \"EpitechIT31000/chocolatine\")")
        stringParam("DISPLAY_NAME",
                    null,
                    "Display name for the job")
    }
    steps {
        dsl {
            external("seedTemplate")
        }       //dsl
     }      //steps
}       //freeStyle

I am uncertain about the dsl step although I think it might be my best chance of success. I found what I believe to be 2 useful dsl methods in the documentation: "external" and "text".

• External reads a DSL script present in the same workspace as the freeStyleJob, but how can I define a child job with the correct environment (defined in the parent parameters) without the job being created at the same time as the parent job ?
• Text generate the job based on a string, but it seems too redundant and barbarian to be helpful as I CANNOT use another file that the job_dsl.groovy

When I execute the groovy file, only the SEED freeStyleJob is generated and it runs successfully, but I get the following error when I run the child job :

Building in workspace /var/jenkins_home/workspace/Tools/SEED
ERROR: no Job DSL script(s) found at seed_template.groovy

Thank you to everyone who took the time to read my (stupid ?) question.