Pipeline pass parameters to downstream jobs

Question

I'm using Jenkins v2.1 with the integrated delivery pipeline feature (https://jenkins.io/solutions/pipeline/) to orchestrate two existing builds (build and deploy).

In my parameterized build I have 3 user parameters setup, which also needs to be selectable in the pipeline.

The pipeline script is as follows:

node: {
    stage 'build'
    build job: 'build', parameters: [[$class: 'StringParameterValue', name: 'target', value: target], [$class: 'ListSubversionTagsParameterValue', name: 'release', tag: release], [$class: 'BooleanParameterValue', name: 'update_composer', value: update_composer]]

    stage 'deploy'
    build job: 'deploy', parameters: [[$class: 'StringParameterValue', name: 'target', value: target]]
}

This works correctly except for the BooleanParameterValue. When I build the pipeline the following error is thrown:

java.lang.ClassCastException: hudson.model.BooleanParameterValue.value expects boolean but received class java.lang.String

How can I resolve this typecasting error? Or even better, is there a less cumbersome way in which I can just pass ALL the pipeline parameters to the downstream job.

Answer 1

Assuming

value: update_composer

was the issue, try

value: Boolean.valueOf(update_composer)

is there a less cumbersome way in which I can just pass ALL the pipeline parameters to the downstream job

Not that I know of, at least not without using Jenkins API calls and disabling the Groovy sandbox.

Answer 2

In addition to Jesse Glick answer, if you want to pass string parameter then use:

build job: 'your-job-name', 
    parameters: [
        string(name: 'passed_build_number_param', value: String.valueOf(BUILD_NUMBER)),
        string(name: 'complex_param', value: 'prefix-' + String.valueOf(BUILD_NUMBER))
    ]

Answer 3

like Jesse Jesse Glick and abguy said you can enumerate string into Boolean type:

Boolean.valueOf(string_variable)

or the opposite Boolean into string:

String.valueOf(boolean_variable)

in my case I had to to downstream Boolean parameter to another job. So for this you will need the use the class BooleanParameterValue :

build job: 'downstream_job_name', parameters:
[
[$class: 'BooleanParameterValue', name: 'parameter_name', value: false],
], wait: true

Answer 4

Jenkins "boolean" parameters are really just a shortcut for the "choice parameter" type with the choices hardcoded to the strings "true" and "false", and with a checkbox to set the string variable. But in the end, it is just that: a string variable, with nothing to do with a true boolean. That's why you need to convert the string to a boolean if you don't want to do a string comparison like:

if (myBoolean == "true")