How to use file parameter in jenkins

Question

I am executing parameterised build in jenkins to count no. of lines in file which has 1 file parameter. Its file location is pqr. The name of the script file is

Answer 1

There is a workaround for this issue https://github.com/janvrany/jenkinsci-unstashParam-library and in a pipeline script you do:

library "jenkinsci-unstashParam-library"
node {
  def file_in_workspace = unstashParam "file"
  sh "cat ${file_in_workspace}"
}