Define global environment variables from inside a stage

Question

I have env vars defined in my environment directive at the top of the pipeline:

environment {
    var1 = 'sdfsdfdsf'
    var2 = 'sssssss'
}

But there are some that I need to dynamically set or override in the stages. But if I use an environment{} directive in a stage the vars won't be accessible to other stages. Initially I thought I could define them all with default values in the top environment directive and overwrite them in the pipeline but this is the behavior I observed:

1. Define var in environment block
2. Try to overwrite in script{} block like: script {env.var1 = 'new value'}
3. The env is not overwritten

How can I change the envs?

Answer 1

You can do it as follow:

1. Define var in stage environment { env.var1 = 'value' }

2. you can access same var in other stages and change value in environment { env.var1 = 'value2' }

    pipeline {
     agent any
     environment { 
        var1 = 'value'
     }
   
     stages {
        stage('Initialize') {
          steps {
           script {
           echo ("value : " + env.var1)
            }
          }
       }
   
       stage('build') {
         environment { 
           var1 = 'value2'
          }
          steps {
           script {
             echo ("value : " + env.var1)
           }
         }
       }
     }
   }