访问Groovy中的Jenkins全局属性

Question

At this moment I defined a environment variable called GLOBAL_VAR with the value 'test' under Manage Jenkins -> Configure System -> Global Properties. I have a shell script when a project is being build containing

echo "The value of the global variable is ${GLOBAL_VAR}"

If executed, the result is what I expected:

The value of the global variable is test

Now my problem is that I want to access this variable in a Groovy script which is used to create a drop-down menu in the parameterized build properties of Jenkins. This drop-down menu contains values also used in the shell script(s) executed when a build is performed. So the drop down items should be created when someone clicks "Build with Parameters" in Jenkins itself eg before any build is started .

I don't want to change the shell script code and the drop-down Groovy script every time I want to change these values. Moreover, I want to use the same values in different build jobs which means I need to change them all every time I need to change a variable.

The Dynamic Choice Parameter creating the drop-down menu contains only the following Groovy expression to generate the choices:

 def list = ["Option 1", "Option 2", "Option 3", "Option 4"]

And I want to add the value of my GLOBAL_VAR to this list.

Does anyone know how to access the Jenkins environment variables in Groovy? Or does anyone know a different way to manage variables I want to use both within the Dynamic Choice Parameter (drop-down menu) and in the shell scripts executed when building?

Answer 1

in "Execute Groovy script" you can access global (and build) variables by:

def env = System.getenv()
println(env['GLOBAL_VAR'])

Answer 2

Here is an example of some working code:

import jenkins.model.*
nodes = Jenkins.instance.globalNodeProperties
nodes.getAll(hudson.slaves.EnvironmentVariablesNodeProperty.class)
envVars = nodes[0].envVars
envVars['MY_GLOBAL_PROPERTY']

Sources of my solution:

https://gist.github.com/johnyzed/2af71090419af2b20c5a

http://pghalliday.com/jenkins/groovy/sonar/chef/configuration/management/2014/09/21/some-useful-jenkins-groovy-scripts.html

Note to the "hard core" moderator that deleted my previous answer: I have spent quite a few hours searching on the Internet before finding the right solution, you shouldn't delete posts without knowing what is it really talking about. I find such behavior rather discouraging :(

Answer 3

Does anyone know how to access the Jenkins environment variables in groovy?

I can provide an example from a Jenkins job we use. The job is parameterized and provides the user with the ability to set many values, one of which is "InstallVersion" (default value is -1). Additionally, we set up an environment variable called "JENKINS_TRUNK_LABEL". I won't go into specifics about this job, but, here's how we refer to "JENKINS_TRUNK_LABEL" within a Groovy script.

if (InstallVersion == "-1")
{
  InstallVersion = "$JENKINS_TRUNK_LABEL"
}

Answer 4

You can use:

import jenkins.model.*
instance = Jenkins.getInstance()
globalNodeProperties = instance.getGlobalNodeProperties()
envVarsNodePropertyList = globalNodeProperties.getAll(hudson.slaves.EnvironmentVariablesNodeProperty.class)

newEnvVarsNodeProperty = null
envVars = null

if ( envVarsNodePropertyList == null || envVarsNodePropertyList.size() == 0 ) {
  newEnvVarsNodeProperty = new hudson.slaves.EnvironmentVariablesNodeProperty();
  globalNodeProperties.add(newEnvVarsNodeProperty)
  envVars = newEnvVarsNodeProperty.getEnvVars()
} else {
  envVars = envVarsNodePropertyList.get(0).getEnvVars()

}

envVars.put("FOO", "foo")
instance.save()

The solution was found here