Экранирование $

Jenkinsfile

@@ -18,17 +18,23 @@ pipeline {
         stage('Extract VERSION') {
             steps {
                 script {
+                    def versionFile = "src/main/resources/META-INF/ncore-product/${env.PRODUCT_GROUP}/version.properties"
+
+                    if (!fileExists(versionFile)) {
+                        error "Version file not found: ${versionFile}"
+                    }
+
                     env.VERSION = sh(
                         script: """
                             set -e
-                            VERSION=\$(sed -n 's/^version=//p' ${versionFile})
+                            VERSION=\\\$(sed -n 's/^version=//p' ${versionFile})
 
-                            if [[ ! "\$VERSION" =~ ^[0-9]+(\\.[0-9]+)*(-[A-Za-z]+)?$ ]]; then
-                                echo "Invalid version format: \$VERSION" >&2
+                            if [[ ! "\\\$VERSION" =~ ^[0-9]+(\\\\.[0-9]+)*(-[A-Za-z]+)?$ ]]; then
+                                echo "Invalid version format: \\\$VERSION" >&2
                                 exit 1
                             fi
 
-                            echo "\$VERSION"
+                            echo "\\\$VERSION"
                         """,
                         returnStdout: true
                     ).trim()