Jenkins pipeline date helper functions

This is how you can calculate days between two dates in Jenkins pipeline. @NonCPS annotation is useful when you have methods which use objects that aren’t serializable

import java.text.SimpleDateFormat

stages {
    stage("Calculate days") {
      steps {
        script {
          def daysRemaining = getRemainingDays("2020-06-25")
        }
      }
    }
  }
}

@NonCPS
def getRemainingDays(previousDate){
  def currentDate = new Date()
  String currentTimeFormat= currentDate.format("yyyy-MM-dd")
  def oldDate = new SimpleDateFormat("yyyy-MM-dd").parse(previousDate)
  return currentTimeFormat-oldDate
}

Calculate if date is greater than 14 days

import java.time.LocalDate
import java.time.format.DateTimeFormatter

stages {
    stage("Check if date is older than 14 days") {
      steps {
        script {
          if (checkIfOtherThan("2020-06-25")){
            println "Date is greater than 14 days"
          }
        }
      }
    }
  }
}

@NonCPS
def checkIfOlderThan(previousDate){
  def dateFormat = DateTimeFormatter.ofPattern("yyyy-MM-dd")
  def currentDate = LocalDate.now().format(dateFormat);
  def projectpreviousDate = LocalDate.parse(previousDate,  dateFormat)
  if (LocalDate.parse(currentDate, dateFormat).minusDays(14) > projectpreviousDate) {
    return true;
  }
  return false;
}