Need help to read a json file using groovy and Jenkins - jenkins

Question

I am facing some issues reading a JSON file.
I am using Jenkins Active Choice Parameter to read value from a JSON file via groovy script. This is how my JSON file look.
{
"smoke": "Test1.js",
"default": "Test2.js"
}
I want my groovy script to print out smoke and default. Below is what my groovy code look like.
import groovy.json.JsonSlurper
def inputFile = new File(".\TestSuitesJ.json")
def InputJSON = new JsonSlurper().parseText(inputFile)
InputJson.each
{
return[
key
]
}
Above code is not working for me. Can someone please suggest a better groovy way?

Answer 1

Anyone in similar situation as me trying to import a JSON file at runtime. I used Active Choice parameter to solve my problem. There is an option to write groovy script in Active Choice Parameter plugin of Jenkins. There i have written below code to import a JSON file to achieve desired results.
import groovy.json.JsonSlurper
def inputFile = new File('.//TestSuitesJ.json')
def inputJSON = new JsonSlurper().parse(inputFile)
def keys = inputJSON.keySet() as List
Thanks #sensei to help me learn groovy.

Answer 2

You really should read the groovy dev kit page, and this in particular.
Because in your case parseText() returns a LazyMap instance, the it variable you're getting in your each closure represents a Map.Entry instance. So you could println it.key to get what you want.
A more groovy way would be:
inputJson.each { k, v ->
println k
}
In which case groovy passes your closure the key (k) and the value (v) for every element in the map.