// add-jenkins-param.groovy
// Adds a parameter to all jobs on a Jenkins instance.
// The parameter is then exposed as an environment variable.

import hudson.model.*

key   = 'GEM_SOURCE'
value = 'http://rubygems.delivery.puppetlabs.net'

for(job in Hudson.instance.items) {
    println("[ " + job.name + " ] setting " + key + "=" + value)

    newParam = new StringParameterDefinition(key, value)
    paramDef = job.getProperty(ParametersDefinitionProperty.class)

    if (paramDef == null) {
        newArrList = new ArrayList<ParameterDefinition>(1)
        newArrList.add(newParam)
        newParamDef = new ParametersDefinitionProperty(newArrList)
        job.addProperty(newParamDef)
      }
    else {
        // Parameters exist! We should check if this one exists already!
        // TODO: contains() isn't working for what we need. Walk the
        // params to see if the param already exists.
        if (!paramDef.parameterDefinitions.contains(newParam)) {
            paramDef.parameterDefinitions.add(newParam)
        }
    }
    job.save()
    println()
}