def call(String chartPath, String appName, String version) {
    container('helm') {
        sh "sed -i 's/^version:.*/version: ${version}/' ${chartPath}/Chart.yaml"
        sh "sed -i 's/^image:.*/image: localhost:31050/my-docker-repo/${appName}:${version}/' ${chartPath}/values.yaml"
        sh "helm package ${chartPath}"
        echo "Helm chart packaged successfully: ${chartPath}"
    }
}