How to check if build parameter is available in Jenkinsfile

Question

I have a pipeline script that should work with and without parameters. So I have to check if the parameter is available.

I tried if(getBinding().hasVariable(\"mypa

Answer 1

The problem: Avoiding null parameters or not configured one's in your pipeline job

Solution: You've got 2 options in order to set default configuration to variables in declarative pipelines

Option 1. Using jenkins ability to set parameters scope fallback , this affect your pipeline configuration on job in jenkins (if your configure things in your declarative pipeline it will override your configuration in job parameters).

parameters{    
  booleanParam(defaultValue: false, description: 'some description', name: 'SOME_FLAG')
}

Option 2. Securing your variables yourself, check if variable is not null and then assign the variable in the pipeline , this functionality doesn't affect your job configuration and it's better in my opinion:

some_flag = params.SOME_FLAG != null ? params.SOME_FLAG.toBoolean() : false