Reading .json file from Workspace in Jenkins with Groovy script - jenkins

Question

I want to read a .json file in the stage Prepare Artifacts, which is there in workspace.
How can I read the workspace file path in the staging groovy and run the code?
The below code I used:
checkout scm: [
$class: 'GitSCM',
branches: [[name: "FETCH_HEAD"]],
extensions: [
[$class: 'RelativeTargetDirectory',
relativeTargetDir: repo2],
[$class: 'WipeWorkspace'],
[$class: 'CloneOption',
depth: 1,
noTags: true,
reference: '',
shallow: true,
honorRefspec: true],
[$class: 'CheckoutOption',
timeout: 30]],
gitTool: 'Default',
submoduleCfg: [],
userRemoteConfigs: [
[credentialsId: 'JENKINS_LOGIN',
]
]
]
def releasePackages = readJSON file: "./BuildAutomation/Jenkins/Pipeline//files/release_package.json"
println releasePackages
}
}
}
stage('Prepare Variable') {
steps {
script{
for(file in releasePackages[buildMod]['India']) {
bat("xcopy ..\\CALReleaseOutput\\${file} ..\\${IndiaReleaseOutputFolder}\\${file} /I /E /Y")
}
for(file in releasePackages[buildMod]['Russia']) {
bat("xcopy ..\\CALReleaseOutput\\${file} ..\\${RussiaReleaseOutputFolder}\\${file} /I /E /Y")
}
zip archive: false, dir: "..\\${b2bReleaseOutputFolder}", glob: '', zipFile: "..\\CALReleaseOutput_${tagFoldername}_B2B.zip"
}
}
}
}
}
}
}
When I run above one, I got error message as below
Console Output

Answer 1

If you are going to use variables between stages you have to define them as Global variables. Hence try defining releasePackages outside the pipeline. Following is an example.
def releasePackages
pipeline {
agent any
stages {
stage('SetVariable') {
steps {
script {
releasePackages = readJSON file: "./BuildAutomation/Jenkins/Pipeline//files/release_package.json"
echo "$releasePackages"
}
}
}
stage('UseVariable') {
steps {
echo "$releasePackages"
}
}
}
}