Jenkins inject environment variable

Question

In a Jenkins job I\'m doing a couple of actions that reside in the pre-step build, such as executing a shell script. With the use of the Jenkins plugin \"EnvInject\" I want

Answer 1

I had a similar requirement in my project, except my project was Maven. To use a variable value from jenkins to my java code, I used -DargLine="-DEnv=$Environment" inside "Build->Advanced->JVM Options". From my java code, I fetched the value of "Env" using System.getProperty(). FYI "Environment" is my Jenkins Variable, and "Env" is variable which is storing the value passed from jenkins into its variable(Environment) and fetched in java code using System.getProperty().

Answer 2

My solution:

Create a "Build a free-style software project".

1. Jenkins > New Item > Build a free-style software project
2. Add 1st step: Execute shell @ Build, and echo key=value pairs to a .properties file
3. Add 2nd step: Inject environment variables, use the .properties file as defined in step 2
4. Add 3rd step: Invoke top-level Maven targets

All custom environment variables are accessible with the key as defined in step #2. This was the only way I found to inject environment variables from shell to java.