corrected how environment variables are read

vars/addHelmRepo.groovy

@@ -1,4 +1,6 @@
-def call(String repoName, String repoUrl) {
+def call(String repoName) {
+    def repoUrl = env.NEXUS_URL
+
     container('helm') {
         sh "helm repo add ${repoName} ${repoUrl}"
         sh 'helm repo update'

vars/deployHelm.groovy

@@ -1,4 +1,7 @@
-def call(String releaseName, String chartRepo, String chartName, String version, String kubeApi, String kubeToken, String image, Map values = [:]) {
+def call(String releaseName, String chartRepo, String chartName, String version, String image, Map values = [:]) {
+    def kubeApi =  env.KUBERNETES_API
+    def kubeToken = env.KUBERNETES_TOKEN
+
     container('helm') {
         def helmCommand = "helm install ${releaseName} ${chartRepo}/${chartName} --version ${version} --kube-apiserver ${kubeApi} --kube-token ${kubeToken} --kube-insecure-skip-tls-verify --set image=${image}"
 

vars/dockerBuildAndPush.groovy

@@ -1,6 +1,9 @@
-def call(String dockerRepo, String imageName, String dockerfilePath, String buildContext, String nexusUser, String nexusPass) {
+def call(String imageName, String dockerfilePath, String buildContext, String nexusUser) {
+    def dockerRepo = env.NEXUS_DOCKER_URL
+    def nexusPass = env.NEXUS_DOCKER_PASS
+
     container('docker') {
-        sh "dockerd --insecure-registry http://$NEXUS_DOCKER_URL &"
+        sh "dockerd --insecure-registry http://${dockerRepo} &"
         echo "Started Docker daemon"
         sh "docker build -t ${imageName} -f ${dockerfilePath} ${buildContext}"
         echo "Docker image ${imageName} built"

vars/uploadHelmChart.groovy

@@ -1,4 +1,6 @@
-def call(String chartFile, String nexusUrl, String nexusUser, String nexusPass) {
+def call(String chartFile, String nexusUser, String nexusPass) {
+    def nexusUrl = env.NEXUS_URL
+
     container('maven') {
         sh "curl -u ${nexusUser}:${nexusPass} --upload-file ${chartFile} ${nexusUrl}"
         echo "Helm chart uploaded: ${chartFile} -> ${nexusUrl}"